Terminal and communication method executed by a terminal

Abstract

User equipment in a radiocommunication system includes the user equipment and a base station, the user equipment including: a transmitting unit that transmits a first maximum bandwidth, which is the maximum bandwidth available to the user equipment for communication, to the base station; and a receiving unit that receives, from the base station, a center frequency or frequencies at both ends of a band having a bandwidth that is equal to or less than the first maximum bandwidth, within a band having a second maximum bandwidth that is the maximum bandwidth available to the base station for communication.

Description

1 / 47 TERMINAL AND COMMUNICATION METHOD EXECUTED BY A TERMINAL FIELD OF TECHNIQUE

[001] The present invention relates to a user device and a base station in a radio communication system. BACKGROUND OF THE TECHNIQUE

[002] Currently, in a 3rd Generation Partnership Project (3GPP), a next-generation system, which corresponds to a successor to Long Term Evolution (LTE) - Advanced as one of the fourth-generation radiocommunication systems and is called 5G, was examined. In 5G, for example, the following use cases, such as an extended mobile broadband (eMBB), a massive machine-type communication (mMTC) and an ultra-reliability and low-latency communication (URLLC) are assumed. LIST OF REFERENCES NON-PATENT DOCUMENT Non-patent document 1: 3GPP TS 36.104 V14.0.0 (2016-06) Non-patent document 2 3GPP TS 36.331 V13.2.0 (2016-06) Non-patent document 3 3GPP TS 36.101 V14.0.0 (2016-06) SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[003] In the 5G radio communication system where several use cases as described above are assumed, in each of a downlink (DL) and an uplink (UL), it is preferable to use an arbitrary bandwidth of a width from a narrow band (e.g., 1 RB (180 KHz) of LTE) to an ultra-wide bandwidth (e.g., a 5 GHz bandwidth).

[004] However, in existing LTE (including LTE-Advanced), as a channel bandwidth, six standard bandwidths are defined including 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz (Document No. Petition 870240092730, dated 10 / 30 / 2024, page 12 / 61 2 / 47 Patent 1), and any channel bandwidth between the channel bandwidths is used in each cell. Furthermore, user equipment, which resides in a given cell, uses a channel bandwidth that is used in the cell. In this situation, in a case where a wide bandwidth band (e.g., 800 MHz) is allocated to a service provider and an operation is performed using the band, for example, it is considered that the band is divided into 40 carriers having a bandwidth of 20 MHz, and carrier aggregation (CA) with a maximum of 40 CCs is performed.However, in a case where the CA with the maximum 40 CCs is defined, it is considered necessary for the user equipment to notify the base station of the capacity related to a combination of bands related to many combinations for the user equipment to perform the CA corresponding to the capacity of the user equipment, and there is a possibility that the system capacity will decrease due to an increase in the amount of signaling.

[005] In order to avoid the occurrence of the problem described above, in 5G, it is preferable that the user equipment can flexibly use a band (for example, a band that is allocated to the service provider and is supported by the base station) with a bandwidth provided in a radio communication system according to the capacity of the user equipment, even if it does not run CA.

[006] The present invention was made in consideration of the circumstances described above, and the object is to provide a technology capable of enabling a user's equipment to flexibly use a band with a bandwidth provided in a radio communication system according to the capacity of the user's equipment. WAYS TO SOLVE THE PROBLEM Petition 870240092730, dated 10 / 30 / 2024, page 13 / 61 3 / 47

[007] According to a technology that is described, user equipment is provided in a radiocommunication system including the user equipment and a base station. The user equipment includes: a transmitting unit that transmits a first maximum bandwidth, which is the maximum bandwidth available to the user equipment in a communication, to the base station; and a receiving unit that receives, from the base station, a center frequency or frequencies at both ends of a band having a bandwidth that is equal to or less than the first maximum bandwidth, in a band having a second maximum bandwidth that is the maximum bandwidth available to the base station in a communication. EFFECT OF THE INVENTION

[008] D According to the technology described, it is possible to provide a technology capable of enabling a user's equipment to flexibly use a band with a bandwidth provided in a radio communication system according to the capacity of the user's equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[009] Fig. 1 is a configuration diagram of a radio communication system, according to an embodiment of the invention; Fig. 2 is a view illustrating an overview of the maximum available bandwidth used in a radio communication system according to the embodiment of the invention; Fig. 3 is a sequence diagram illustrating a complete flow of an operation in the radio communication system according to the embodiment of the invention; Fig. 4 is a view illustrating an example of a specification form corresponding to the Method 1 Example of giving a notification. Petition 870240092730, dated 10 / 30 / 2024, p. 14 / 61 4 / 47 of the maximum available bandwidth supported by a base station 20; Fig. 5 is a view illustrating an example of a specification form corresponding to the Example of Method 1 for giving a notification of the maximum available bandwidth supported by base station 20; Fig. 6 is a view illustrating an example of a specification form corresponding to the Example of Method 1 for giving a notification of the maximum available bandwidth supported by base station 20; Fig. 7 is a view illustrating an example of a specification form corresponding to the Method 2 Example of giving a notification of the maximum available bandwidth supported by base station 20; Fig. 8 is a view illustrating an example of a specification form corresponding to the Method 2 Example of giving a notification of the maximum available bandwidth supported by base station 20; Fig. 9 is a view illustrating an example of a specification form corresponding to the Method 2 Example of giving a notification of the maximum available bandwidth supported by base station 20; Fig. 10 is a view illustrating an example of a specification form corresponding to the Example of Method 3 for giving a notification of the maximum available bandwidth supported by base station 20; Fig. 11 is a view illustrating an example of a specification form corresponding to the Method 3 Example of giving a notification of the maximum available bandwidth supported by base station 20; Fig. 12 is a view illustrating an example of a specification form corresponding to the Example of Method 3 for giving a notification of the maximum available bandwidth supported by base station 20; Fig. 13 is a view illustrating Example 1 of EU capacity related to maximum available bandwidth; Petition 870240092730, dated 10 / 30 / 2024, p. 15 / 61 S / ^7 Fig. 14 is a view illustrating Example 2 of EU capacity related to maximum available bandwidth; Fig. 15 is a view illustrating Example 3 of EU capacity related to maximum available bandwidth; Fig. 16 is a view illustrating Example 1 of resource allocation; Fig. 17 is a view illustrating Example 2 of resource allocation; Fig. 18 is a view illustrating an example of a center frequency and sub-band configuration; Fig. 19 is a view illustrating an example of a synchronization signal; Fig. 20 is a view illustrating an example of the synchronization signal; Fig. 21 is a view illustrating an example of the synchronization signal; Fig. 22 is a view illustrating an example of a functional configuration of a user equipment 10; Fig. 23 is a view illustrating an example of a functional configuration of base station 20; and Fig. 24 is a view illustrating an example of a hardware configuration of user equipment 10 and base station 20. METHOD(S) FOR CARRYING OUT THE INVENTION

[010] Hereafter, an embodiment (this embodiment) of the invention will be described with reference to the accompanying drawings. In addition, the following embodiment is merely illustrative, and an embodiment to which the invention applies is not limited to the following embodiment.

[011] A base station 20 and a user equipment 10 in a radiocommunication system of this modality may perform an operation based on an LTE communication mode (including LTE-Advanced and 5G, which is a successor), provided that the inconsistency of a technology described in this modality does not occur. Thus, an existing technology defined in LTE may Petition 870240092730, dated 10 / 30 / 2024, page 16 / 61 6 / 47 to be used appropriately when radio communication is operating. However, the existing technology is not limited to LTE. Furthermore, the invention is also applicable to a communication mode other than LTE.

[012] Furthermore, in the following modality, terms such as P-BCH, MIB and SIB2, which are used in LTE, are used. However, the terms are only illustrative, and the terms may be called by other names, such as a channel and a signal that have the same function. (Complete System Configuration)

[013] Fig. 1 illustrates a configuration diagram of a radiocommunication system, according to this embodiment. As illustrated in Fig. 1, the radiocommunication system according to this embodiment includes a user equipment 10 and a base station 20. In Fig. 1, the user equipment 10 and the base station 20 are illustrated one by one. However, this is only illustrative, and the user equipment 10 and the base station 20 may, respectively, be provided in a plural number. Furthermore, the base station 20 may include one or more remote radio headers (RRH). (Bandwidth Overview)

[014] A description will be given of an overview of the issues relating to a bandwidth that is used in the radiocommunication system according to this modality with reference to Fig. 2.

[015] As described above, in LTE, only six standards are defined as a channel bandwidth and therefore the channel bandwidth that is supported on each user equipment and the base station is limited to the six standards. By using existing radio transmission and reception technology, it is possible to support a bandwidth other than the six standards in LTE as a channel bandwidth on the user equipment and the base station, but the channel bandwidth defined in LTE includes six standards. Petition 870240092730, dated 10 / 30 / 2024, page 17 / 61 7 / 47 Therefore, in LTE, the channel bandwidth supported on each user device and base station is limited to six standards.

[016] On the other hand, in the radiocommunication system according to this modality, a channel bandwidth of a limited standard similar to LTE is not provided, and each of the 10 user equipment and the 20 base station is configured to support a bandwidth from a narrow bandwidth to an ultra-wide bandwidth (e.g., 5 GHz). Here, for example, the narrow bandwidth is a minimum programming unit of the radiocommunication system in this modality. For example, the minimum programming unit may be 180 kHz, which is a bandwidth of 1 resource block (RB) in LTE.

[017] In this mode, a maximum available bandwidth, which is available to user equipment 10 and base station 20 in a communication, is used. User equipment 10 and base station 20 can perform a communication using a band with a bandwidth equal to or less than the maximum available bandwidth.

[018] The maximum available bandwidth may be referred to as a transmission bandwidth configuration. Additionally, a bandwidth in which a guard band is added on both sides of the maximum available bandwidth may be referred to as channel bandwidth. Furthermore, the maximum available bandwidth may be referred to as channel bandwidth. Additionally, the maximum available bandwidth may be replaced by any term such as transmission bandwidth, reception bandwidth, transmission and reception bandwidth, maximum bandwidth, maximum transmission bandwidth and maximum reception bandwidth, maximum transmission and reception bandwidth, and system bandwidth. Furthermore, the Petition 870240092730, dated 10 / 30 / 2024, page 18 / 61 8 / 47 maximum available bandwidth can be replaced by any name other than the terms described above.

[019] Fig. 2 illustrates an example of the use of the maximum available bandwidth in the radiocommunication system, according to this modality. Furthermore, the maximum available bandwidth illustrated in Fig. 2 can be interpreted as a maximum available bandwidth of a DL, a maximum available bandwidth of a UL, or a maximum available bandwidth that is common to both the DL and the UL (for example, in a TDD case).

[020] In the example in Fig. 2, base station 20 supports a maximum available bandwidth of XMHz (X is a predetermined number). For example, a value of the maximum available bandwidth is any value in the range 1 < x < 5000 (MHz). In this case, 1 is the minimum value and 5000 is the maximum value. The minimum and maximum values ​​can be determined in advance according to the specifications.

[021] Furthermore, in the example in Fig. 2, a user device 10 (A) supports a maximum available bandwidth of 100 MHz, a user device 10 (B) supports a maximum available bandwidth of 200 MHz and a user device 10 (C) supports a maximum available bandwidth of 400 MHz.

[022] Each user equipment 10 performs communication with base station 20 using a bandwidth within a range of the maximum available bandwidth of user equipment 10. For example, user equipment 10 (C) may perform communication with base station 20 using a bandwidth (e.g., 400 MHz, 200 MHz, and the like) that is equal to or less than 400 MHz according to the resource allocation of base station 20.

[023] As described above, the maximum available bandwidth can Petition 870240092730, dated 10 / 30 / 2024, page 19 / 61 9 / 47 can be defined for an arbitrary bandwidth and granularity, for example, a unit of 1 RB (e.g., 180 kHz), a unit of 1 MHz, or a channel sweep (100 kHz). Additionally, other values ​​can be defined as the granularity.

[024] Furthermore, in the radiocommunication system according to this modality, with respect to the number (X) of FFT points, an arbitrary integer can be taken in a predetermined range such as 1 < X < N (for example, N is 524288). Furthermore, a spectrum mask is defined as a function of a bandwidth X, and the user equipment 10 can calculate and apply the spectrum mask from a bandwidth that is used using the function.

[025] From here on, an example of operation and similar radiocommunication systems according to this modality will be described in more detail. Complete Operation Flow

[026] A description will be given of an example of an entire flow of an operation in the radio communication system according to this mode with reference to a sequence diagram in Fig. 3.

[027] In the Sl stage, base station 20 notifies user equipment 10 of a maximum available bandwidth that is supported by base station 20. In this mode, the notification is performed through system information broadcasting. However, the notification can be performed using an individual channel for each user equipment. Furthermore, in the Sl stage, the notification of the maximum available bandwidth can be performed in relation to each of the maximum available bandwidths of the DL and one maximum available bandwidth of the UL, or in relation to any of the maximum available bandwidths of the DL and the maximum bandwidth Petition 870240092730, dated 10 / 30 / 2024, page 20 / 61 10 / 47 available from the UL. Furthermore, in a case where the maximum available bandwidth from the UL and the maximum available bandwidth from the DL are the same, notification of the maximum available bandwidth can be performed without discrimination between the UL and the DL.

[028] As an example, user equipment 10, which receives the maximum available bandwidth supported by base station 20 from base station 20, can determine whether or not to reside in a cell of base station 20. For example, in a case where base station 20 only supports a maximum available bandwidth that is less than the bandwidth required for a communication, user equipment 10 is considered to be able to make a determination as not being resident in the cell. Furthermore, as will be described later, even in this case, user equipment 10 can perform a communication in a state of being resident in the cell.Furthermore, in a case where a band (frequency) not supported by user equipment 10 is present in a band that has the maximum available bandwidth supported by base station 20, user equipment 10, which receives the maximum available bandwidth supported by base station 20 from base station 20, can give a notification of the band (frequency) in step S2. In this case, base station 20 can allocate a resource, except for the band not supported by user equipment 10.

[029] Furthermore, in this mode, as will be described later, when user equipment 10 is notified of a central frequency from base station 20, user equipment 10 can capture a range of resources, for example, by the central frequency and maximum available bandwidth of user equipment 10. Therefore, the SI step may not be performed. Petition 870240092730, dated 10 / 30 / 2024, p. 21 / 61 11 / 47

[030] In step S2, user equipment 10 reports capacity information (UE capacity) of the maximum available bandwidth supported by user equipment 10 to base station 20. Reporting of the maximum available bandwidth in step S2 can be performed in relation to each of the maximum available bandwidths of the DL and the maximum available bandwidth of the UL, or it can be performed in relation to either the maximum available bandwidth of the DL and the maximum available bandwidth of the UL. Furthermore, in a case where the maximum available bandwidth is the same between UL and DL, the capacity information report of the maximum available bandwidth (which is common to UL and DL) can be performed without discrimination between UL and DL.

[031] In step S3, for example, base station 20 performs the configuration of a sub-band and a center frequency to be described later based on the maximum available bandwidth supported by base station 20 and the maximum available bandwidth supported by user equipment 10, and gives an instruction to (allocate) a resource in a sub-band, which is used by user equipment 10 in a communication, to user equipment 10. For example, the instruction is executed by a downlink control physical channel (PDCCH). In step S4, user equipment 10 performs a communication with base station 20 using the resource given in the base station 20 instruction (e.g., performs data transmission or data reception).

[032] Note that the resource used in the information notification in steps S1, S2 and S3 may be a resource that is determined in advance, a dispute-based resource that is arbitrarily selected, a resource that is allocated to user equipment 10 through certain signaling, or a resource different from these resources. Petition 870240092730, dated 10 / 30 / 2024, page 22 / 61 12 / 47

[033] Next, an example of content processing for each of the S1, S2 and S3 stages in more detail.

[034] (Step Sl: Dissemination of the Maximum Available Bandwidth from Base Station 20)

[035] As described above, in step Sl, base station 20 transmits a value of the maximum available bandwidth supported by base station 20 by broadcast. As an example, base station 20 transmits a value of the maximum available bandwidth of the DL with a P-BCH (MIB) and transmits a value of the maximum available bandwidth of the UL with a SIB2. Examples of a method for providing a notification (expression method) of the maximum available bandwidth include the following three examples in this mode. <Exemplo 1 da Notificação de Largura de Banda Máxima Disponível>

[036] In Example 1, the maximum available bandwidth is expressed by an integer value in a unit of 1 RB. For example, the integer value is a value in a range of 1 to 10000 (RBs). As an example, in a case where a bandwidth of 1 RB is 180 KHz and the maximum available bandwidth is 180 MHz, the value of the maximum available bandwidth in Example 1 becomes 1000. <Exemplo 2 da Notificação de Largura de Banda Máxima Disponível>

[037] In Example 2, the maximum available bandwidth is expressed by an integer value in a unit of 25 RBs. That is, when the integer value is defined as N, a relationship of maximum available bandwidth = 25 x N [RBs] is established. Furthermore, for example, N is a value where the maximum available bandwidth is in the range of 25 to 1600 (RBs). That is, for example, a relationship of 1 < N < 64 is established. <Exemplo 3 da Notificação de Largura de Banda Máxima Disponível>

[038] In Example 3, the maximum available bandwidth is expressed by Petition 870240092730, dated 10 / 30 / 2024, p. 23 / 61 13 / 47 is a power of 2 (integer value) with 25 RBs defined as a reference. That is, when the integer value is defined as N, a relationship of the maximum available bandwidth = 25 χ 2ΛN [RBs] is established. Furthermore, for example, a range of N is 0 < N < 63. <Exemplo de Especificação >

[039] Figs. 4 to 6 are examples of the descriptive report (excerpts) of 3GPP corresponding to Example 1. Figs. 4 to 6 are based on Non-Patent Document 2 (3GPP TS 36.331), and an altered portion of Non-Patent Document 2 is expressed by an underline. This is also true of Figures 7 to 12.

[040] Fig. 4 illustrates a MIB for notification of the maximum available DL bandwidth. Bandwidth-dl in the MIB represents the maximum available DL bandwidth. Bandwidth-dl is an integer value in a unit of 1 RB in a range of 1 to 10000.

[041] Figs. 5 and 6 illustrate a SIB2 for notification of the maximum available UL bandwidth. Bandwidth-ul in the SIB2 represents the maximum available UL bandwidth. Bandwidth-ul is an integer value in a unit of 1 RB in a range of 1 to 10000.

[042] Figs. 7 to 9 are examples of the 3GPP descriptive report (excerpts) corresponding to Example 2. Fig. 7 illustrates a MIB for notification of the maximum available DL bandwidth. Bandwidth-dl in the MIB represents the maximum available DL bandwidth. Bandwidth-dl is an integer value in a unit of 25 RBs in a range of 1 to 64.

[043] Figs. 8 and 9 illustrate a SIB2 for notification of the maximum available UL bandwidth. Bandwidth-ul in the SIB2 represents the maximum available UL bandwidth. Bandwidth-ul is an integer value in a unit of 25 RBs in a range of 1 to 64. Petition 870240092730, dated 10 / 30 / 2024, p. 24 / 61 14 / 47

[044] Figs. 10 to 12 are examples of a 3GPP specification (excerpts) corresponding to Example 3. Fig. 10 illustrates a MIB for notification of the maximum available DL bandwidth. Bandwidth-dl in the MIB represents the maximum available DL bandwidth. Bandwidth-dl is an integer value in a range of 0 to 63. When the integer value is set to N, the maximum available bandwidth is 25 X 2ΛN [RBs].

[045] Figs. 11 and 12 illustrate a SIB2 for notification of the maximum available bandwidth of the UL. Bandwidth-ul in the SIB2 represents the maximum available bandwidth of the UL. Bandwidth-ul is an integer value in a range of 0 to 63. When the integer value is set to N, the maximum available bandwidth is 25 X 2ΛN [RBs].

[046] (Step S2: Maximum Available Bandwidth Capacity Report from User Equipment 10 to Base Station 20)

[047] As described above, in step S2, user equipment 10 reports capacity information (UE capacity) of the maximum available bandwidth supported by user equipment 10 to base station 20.

[048] As a method of expressing the maximum available bandwidth in a case of reporting the maximum available bandwidth supported by user equipment 10 to base station 20, any method from Example 1 (a value in a unit of 1 RB), Example 2 (a value in a unit of 25 RB) and Example 3 (a value of a power of 2 with 25 RBs defined as a reference) may be used, or a method different from Example 1 to Example 3 may be used.

[049] Figs. 13 to 15 are views that illustrate examples of the maximum available bandwidth supported by user equipment 10. The example illustrated in Fig. 13 corresponds to a case where the maximum bandwidth Petition 870240092730, dated 10 / 30 / 2024, p. 25 / 61 The available bandwidth of the UL and DL is the same in each case. In this case, for example, since there is a maximum available bandwidth that is common to both the UL and the DL, user equipment 10 can report a maximum available bandwidth to base station 20 as capacity information. Furthermore, even in this case, user equipment 10 can report each of the maximum available bandwidths of the UL and the maximum available bandwidth of the DL to base station 20.

[050] Note that Fig. 13 illustrates a case where the center frequency is the same in UL and DL. However, even in a case where the center frequency is different between UL and DL, if the maximum available bandwidth is the same in UL and DL, the above-described method of describing capacity information can be applied.

[051] The example illustrated in Fig. 14 corresponds to a case where the maximum available bandwidths of UL and DL are different from each other. In this case, for example, user equipment 10 reports each of the maximum available bandwidths of UL and the maximum available bandwidth of DL to base station 20. Note that Fig. 14 illustrates a case where the center frequency is the same in UL and DL.

[052] The example illustrated in Fig. 15 corresponds to a case where the maximum available bandwidths of UL and DL are different from each other. In this case, for example, user equipment 10 reports each of the maximum available bandwidths of UL and the maximum available bandwidth of DL to base station 20. Fig. 15 illustrates a case where the center frequency is different between UL and DL.

[053] (Step S3: Resource Allocation for User Equipment 10)

[054] As described above, in step S3, a resource (e.g., a time and frequency resource) is used by User Equipment 10. Petition 870240092730, dated 10 / 30 / 2024, page 26 / 61 In a communication, 16 / 47 is allocated from base station 20 to user equipment 10. More specifically, a UL resource is allocated to perform UL data transmission by user equipment 10, and a DL resource is allocated to perform DL data transmission by user equipment 10. Note that in a TDD case, a resource can be allocated to user equipment 10 without discrimination between UL and DL. From here on, with respect to the following operation, basically the same operation is performed on both UL and DL, and thus the description will be made using a communication term without discrimination, unless otherwise indicated. That is, the following operation can be interpreted as an operation related to UL or an operation related to DL, unless otherwise indicated.In a case of UL-related operation, the maximum available bandwidth of base station 20 is the receive bandwidth of base station 20, and the maximum available bandwidth of user equipment 10 is the transmit bandwidth of user equipment 10. In a case of DL-related operation, the maximum available bandwidth of base station 20 is the transmit bandwidth of base station 20, and the maximum available bandwidth of user equipment 10 is the receive bandwidth of user equipment 10.

[055] An example of resource allocation in this mode will be described with reference to Figs. 16 and 17. In the example illustrated in Fig. 16, the maximum available bandwidth supported by base station 20 is 800 MHz, the maximum available bandwidth supported by user equipment 10 (A) is 100 MHz, and the maximum available bandwidth supported by user equipment 10 (B) is 200 MHz. That is, the maximum available bandwidth of base station 20 is equal to or greater than the maximum available bandwidth of user equipment 10. Petition 870240092730, dated 10 / 30 / 2024, p. 27 / 61 XljM

[056] In this case, base station 20 allocates a partial band (resource) of a band with the maximum available bandwidth (800 MHz) supported by base station 20 to each user equipment. For example, base station 20 may assign a partial band (e.g., a band indicated by C in Fig. 16) of the band with the maximum available bandwidth (100 MHz), which is supported by user equipment 10 (A), in the band having the maximum available bandwidth (800 MHz) to user equipment 10 (A).

[057] In the example illustrated in Fig. 17, the maximum available bandwidth supported by base station 20 is 400 MHz, and the maximum available bandwidth supported by user equipment 10 is 800 MHz. That is, the maximum available bandwidth of base station 20 is less than the maximum available bandwidth of user equipment 10.

[058] In this case, base station 20 can allocate a partial band (resource) in the band having the maximum available bandwidth (400 MHz) supported by base station 20 for user equipment 10, or it can allocate the entire band having the maximum available bandwidth (400 MHz) supported by base station 20 for user equipment 10. <Exemplo Detalhado da Operação de Alocação de Recursos>

[059] Hereafter, a detailed example description of a resource allocation operation will be given in a case where the maximum available bandwidth of base station 20 is greater than the maximum available bandwidth of user equipment 10 (e.g., Fig. 16). The following operation is primarily focused on a specific user equipment 10. However, the following operation is true for each of a plurality of user equipment under base station 20 according to the user equipment's capacity.

[060] In the case where the maximum available bandwidth of the station Petition 870240092730, dated 10 / 30 / 2024, page 28 / 61 18 / 47 base 20 is greater than the maximum available bandwidth of user equipment 10, the base 20 station divides a band having the maximum available bandwidth of the base 20 station into a plurality of sub-bands based on the maximum available bandwidth (which is captured by the capacity information) of user equipment 10. Furthermore, a center frequency is determined in a sub-band. That is, the center frequency is fixed in resources within the same sub-band.

[061] Fig. 18 illustrates an example of sub-band splitting. Figure 18 illustrates an example in which the maximum available bandwidth of base station 20 is 800 MHz and the maximum available bandwidth of user equipment 10 is 200 MHz. As illustrated in Figure 18, a band having a width of 800 MHz indicated by A is split into four pieces (800 4200) as indicated by B. Furthermore, for example, with respect to user equipment whose maximum available bandwidth is 400 MHz, a band having a width of 800 MHz indicated by A is split into two bands having a width of 400 MHz. Note that splitting also includes management (retention) of information from the split bands (information indicating Sub-B #1 to Sub-B #4 in the example of Figure 18).

[062] Furthermore, as indicated by C in Fig. 18, a physical resource block (PRB) index is applied to each sub-band. As an example, the PRB index in the sub-band is applied in such a way that a numerical value (number) of the index increases one by one from a PRB on a low-frequency side, as illustrated in Fig. 18. For example, 12 (or 16) subcarriers are defined as 1 RB, and an index is applied to the PRB in ascending order from a PRB on a low-frequency side towards a PRB on a high-frequency side in a sub-band. An index application rule is picked up by user equipment 10 and base station 20. Petition 870240092730, dated 10 / 30 / 2024, page 29 / 61 19 / 47

[063] Furthermore, base station 20 obtains the center frequency of each of the sub-bands of a band with the maximum available bandwidth supported by base station 20 and the maximum available bandwidth supported by user equipment 10. For example, in a case where the center frequency of the band supported by base station 20 is 28 GHz, the maximum available bandwidth supported by base station 20 is 800 MHz, and the maximum available bandwidth supported by equipment 10 is 200 MHz, the number of sub-bands is four and the center frequency can be calculated as 27700 MHz, 27900 MHz, 28100 MHz and 28300 MHz on a low-frequency side.

[064] More generally, in a case where the center frequency of a band supported by base station 20 is CF, the maximum available bandwidth supported by base station 20 is BSBW, and the maximum available bandwidth supported by user equipment 10 is UEBW, the number of subbands is BSBW 4 - UEBW. Note that in this example, BSBW is assumed to be a numerical value that is divisible by UEBW without a remainder. In a case where BSBW is not divisible by UEBW, it is preferable to round down the remainder (a number that is less than 1) that is not divisible in order to introduce the maximum available bandwidth of base station 200. However, the remainder (number less than 1) that is not divisible can be rounded down.

[065] Furthermore, as an example, when the number of sub-bands (BSBW 4- UEBW) is defined as N, and a sub-band index is defined as i (i is applied to the sub-bands in such a way that i starts from 0 on a low frequency side, increments one by one; 0 < i < N -1), the center frequency of the sub-bands with index i is calculated by an expression of CF - ((N / 2 - i) x UEBW) + UEBW / 2.

[066] Next, an example of a relationship will be described. Petition 870240092730, dated 10 / 30 / 2024, page 30 / 61 20 / 47 between a synchronization signal and a sub-band in a case where the center frequency is determined by dividing a band based on the maximum available bandwidth of the base station 20 and the maximum available bandwidth of the user equipment 10 as described above with reference to Fig. 19.

[067] Fig. 19 illustrates an example where base station 20 transmits a synchronization signal with a predetermined bandwidth at two frequency positions in a band that has the maximum available bandwidth of base station 20. In Fig. 19, the synchronization signals at the two frequency positions are indicated by SS #1 and SS #2. In addition, base station 20 can transmit a physical broadcast channel (P-BCH; a channel with which MIB and similar are transmitted) with a bandwidth equal to a predetermined bandwidth in which a synchronization signal is transmitted. Furthermore, the number of synchronization signals can be 1 or 3 or higher.

[068] For example, user equipment 10 knows the predetermined bandwidth (e.g., 6 RBs) through which the synchronization signal is transmitted in advance, and searches for a signal with the bandwidth in a frequency direction to detect SS #1 or SS #2 that is transmitted by base station 20. Accordingly, user equipment 10 can be synchronized with base station 20 by SS #1 or SS #2. Here, synchronization is timing synchronization in a time direction, and a radio frame boundary, a sub-frame, a slot, and the like is considered as timing that is acquired with the synchronization signal. That is, the synchronization signal becomes a timing reference.

[069] In addition, user equipment 10 detects SS #1 (or SS #2) to be synchronous with base station 20, and then user equipment 10 Petition 870240092730, dated 10 / 30 / 2024, page 31 / 61 21 / 47 notifies base station 20 of capacity information regarding the maximum available bandwidth. Base station 20 can identify the synchronization of user equipment 10 by SS #1 (or SS #2), for example, by a frequency of a channel that is used to transmit the capacity information. However, the above description is only illustrative, and base station 20 can capture the synchronization of user equipment 10 with SS #1 (or SS #2) using another method.

[070] As illustrated in Fig. 19, the base station 20 divides a bandwidth (800 MHz) into four sub-bands based on the capacity information of the user equipment 10.

[071] In this mode, a synchronization signal and a sub-band that is synchronizable with the synchronization signal are associated with each other. In the example illustrated in Fig. 19, for instance, SS #1 is associated with a subband #1 and a subband #2, and SS #2 is associated with a subband #3 and a subband #4.

[072] Base station 20 manages (maintains) a matching relationship between a synchronization signal and a sub-band that is synchronizable with the synchronization signal. Base station 20 notifies user equipment 10 of a sub-band that is synchronizable with the synchronization signal using the synchronization signal, a P-BCH that is transmitted in the same band as the synchronization signal, or a different channel from these channels. In addition, base station 20 may notify user equipment 10 of a center frequency of a synchronization signal different from the synchronization signal, and a sub-band that is synchronizable with the synchronization signal.

[073] For example, in the example in Fig. 19, in a case where user equipment 10 is synchronized with SS #1, user equipment 10 receives sub-bands #1 and #2 which are synchronizable with SS #1 and / or Petition 870240092730, dated 10 / 30 / 2024, page 32 / 61 22 / 47 is a central frequency of SS #2 and sub-bands #3 and #4 that are synchronizable with SS #2 from base station 20 via SS #1 or P-BCH.

[074] Furthermore, for example, in a case where user equipment 10 is synchronized with SS #2, user equipment 10 receives sub-bands #3 and #4 which are synchronizable with SS #2 and / or a center frequency of SS #1 and sub-bands #1 and #2 which are synchronizable with SS #1 from base station 20 via SS #2 or P-BCH.

[075] As a notification content of sub-bands (sub-bands #1 and #2, or sub-bands #3 and #4) from base station 20 to user equipment 10, for example, any of a center frequency of each sub-band, frequencies at both ends of the sub-band, a frequency position at both ends of a band (for example, a band of sub-band #1 + sub-band #2 for SS1 #1) that is covered with a synchronization signal can be used. In addition, a different method from the methods described above can be used.

[076] Furthermore, for example, in a case where user equipment 10 is synchronized with SS #1, and user equipment 10 receives a resource allocation in sub-band #1 from base station 20, user equipment 10 detects that a frequency position of the resource is within a range covered by SS #1, and can perform data communication using the resource while using synchronization with SS #1. Additionally, in a case where user equipment 10 is synchronized with SS #1, and receives a resource allocation in sub-band #4 from base station 20, user equipment 10 detects SS #2 and a center frequency of SS #2, and can perform data communication using the resource in sub-band #4 using synchronization with SS #2.

[077] Description will be given of another example of a relationship between a Petition 870240092730, dated 10 / 30 / 2024, page 33 / 61 23 / 47 synchronization signal and a sub-band in a case where the center frequency is determined by dividing a band based on the maximum available bandwidth of the base station 20 and the maximum available bandwidth of the user equipment 10 with reference to Fig. 20.

[078] Fig. 20 illustrates an example where four synchronization signals (SS #1 to SS #4) are transmitted from base station 20. Note that, in this example, the number of synchronization signals is 4, and the number may be greater or less than 4. In the example illustrated in Fig. 20, each band of the four synchronization signals is set within a band of any sub-band. Specifically, one band of SS #1 is set in a band of sub-band #1, one band of SS #2 is set in a band of sub-band #2, one band of SS #3 is set in a band of sub-band #3, and one band of SS #4 is set in a band of sub-band #4. Furthermore, as is the case in Fig. 19, base station 20 transmits P-BCH in a band in which a synchronization signal is transmitted. An example of operation of a case illustrated in Fig. 20 is as follows.

[079] For example, user equipment 10 detects SS #1 through cell search, and is synchronized with base station 20. Furthermore, user equipment 10 notifies base station 20 of the maximum available bandwidth capacity information of user equipment 10. Base station 20 can identify the synchronization of user equipment 10 by SS #1, for example, by a channel frequency that is used for capacity information notification. However, the above description is only illustrative, and base station 20 may capture the synchronization of user equipment 10 by SS #1 using another method.

[080] As illustrated in Fig. 20, base station 20 divides a bandwidth (800 MHz) into four sub-bands based on capacity information. Petition 870240092730, dated 10 / 30 / 2024, page 34 / 61 24 / 47 from user equipment 10. Additionally, base station 20 determines the configuration of sub-band #1, including SS #1, for user equipment 10. Note that, in a case where sub-band #1 is defined for user equipment 10, resource allocation for communication with user equipment 10 is performed by a resource in sub-band #1.

[081] In this example, base station 20 notifies user equipment 10 of positions ((A) and (B) in Fig. 20) at both ends of subband #1 on a frequency axis in order to configure subband #1 including SS #1 for user equipment 10. For example, the notification can be performed with P-BCH or other channels.

[082] More specifically, base station 20 notifies user equipment 10 of an absolute frequency value at both ends, or a frequency number at both ends as information indicating the positions of the two ends of sub-band #1 on the frequency axis. For example, the frequency number is the absolute number of the E-UTRA radio frequency channel (EARFCN) (Non-patent document 3), and a physical frequency can be calculated from the number.

[083] User equipment 10, which receives the positions of both ends of sub-band #1 on the frequency axis, can pick up a center frequency of sub-band #1. In addition, when receiving a notification of a PRB index from base station 20 as resource allocation information, user equipment 10 can pick up that the PRB index indicates a PRB in sub-band #1.

[084] As a configuration of sub-band #1 for user equipment 10, this is just one example to notify user equipment 10 of positions at both ends using the absolute value of the frequencies or the frequency number. As another method, base station 20 can Petition 870240092730, dated 10 / 30 / 2024, page 35 / 61 25 / 47 notify user equipment 10 of a shift (a difference in the frequency axis) of the center frequency of SS #1 relative to the positions at both ends. Note that user equipment 10 is synchronized by SS #1, and thus user equipment 10 picks up the center frequency of SS #1.

[085] For example, when the center frequency of SS #1 is set as SCF, the frequency indicated by (A) in Fig. 20 is set as AF, and the frequency indicated by (B) is set as BF, base station 20 notifies user equipment 10 of (AF - SCF) and (BF - SCF) as the offset. Accordingly, user equipment 10, which captures SCF, can capture AF and BF, and can capture the center frequency of sub-band #1 as (AF + BF) / 2.

[086] Note that the example described above is only illustrative. For example, in a case where user equipment 10 is synchronized with SS #2, user equipment 10 receives information indicating positions at both ends of sub-band #2 of base station 20. This is true for SS #3 and SS #4.

[087] As indicated by B in Fig. 18, in addition to the method of determining the center frequency by dividing a band, base station 20 can determine an arbitrary frequency in a band having the maximum available bandwidth supported by base station 20 as the center frequency for user equipment 10, and base station 20 can determine a maximum available bandwidth, which has the center frequency, of user equipment 10 in a capacity range of the maximum available bandwidth supported by user equipment 10, and base station 20 can notify user equipment 10 of the center frequency and the maximum available bandwidth that are determined. Note that base station 20 can notify user equipment 10 of the information (an absolute value of a Petition 870240092730, dated 10 / 30 / 2024, pp. 36 / 61 26 / 47 frequency, a frequency number and the like) indicating positions at both ends of a band corresponding to the center frequency and the maximum available bandwidth that are determined. An example of the maximum available bandwidth is indicated by D in Fig. 18. The maximum available bandwidth that is determined can be called a sub-band. Furthermore, the example indicated by D in Fig. 18 represents an example where the center frequency of the band that has the maximum available bandwidth supported by base station 20 is determined as a center frequency for user equipment 10. Additionally, in the example case, a PRB index is applied as indicated by E in Fig. 18.

[088] Next, a description will be given of an example of a relationship between a synchronization signal and a sub-band in a case where base station 20 determines an arbitrary center frequency and the maximum available bandwidth (sub-band), and notifies user equipment 10 of the center frequency and the maximum available bandwidth. In this case, base station 20 notifies user equipment 10 of a center frequency of a synchronization signal that becomes a timing reference in the case of conducting communication in a band range that has a maximum available bandwidth including the determined center frequency. Notification of the center frequency of the synchronization signal can be performed simultaneously with the notification of a sub-band, or independently of the notification of the sub-band. Furthermore, as a notification channel, P-BCH or other channels can be used.

[089] For example, in a case where a center frequency of a synchronization signal that is currently in use is the same as the notified center frequency of the synchronization signal, user equipment 10, which receives a notification of the synchronization signal center frequency, retains the Petition 870240092730, dated 10 / 30 / 2024, pp. 37 / 61 27 / 47 synchronization with the synchronization signal. In a case where the center frequency of the synchronization signal currently in use is different from the notified center frequency of the synchronization signal, user equipment 10 switches synchronization to synchronization with the synchronization signal having the notified center frequency.

[090] A specific example will be described with reference to Fig. 21. As is the case in Fig. 19, also in the example of Fig. 21, base station 20 transmits SS #1, SS #2 and a P-BCH corresponding to SS #1 and SS #2 in a predetermined bandwidth. In addition, a sub-band, which is synchronizable with each synchronization signal, is set to be the same between Fig. 21 and Fig. 19.

[091] For example, in a case where base station 20, which receives capacity information from user equipment 10, determines a band corresponding to sub-band #1 + sub-band #2 in Fig. 21 as a band (sub-band) for user equipment 10, base station 20 sets SS #1 for user equipment 10 as a timing reference and notifies user equipment 10 of a center frequency of SS #1. The notification of the center frequency of SS #1 can be performed simultaneously with, or independently of, the notification of sub-band #1 + sub-band #2. Furthermore, even in a case where base station 20 determines a band indicated by A in Fig. 21 as a band (sub-band) for user equipment 10, base station 20 sets SS #1 for user equipment 10 as a timing reference and notifies user equipment 10 of a center frequency of SS #1.

[092] Furthermore, for example, in a case where base station 20 determines a band corresponding to sub-band #3 + sub-band #4 in Fig. 21 as a band (sub-band) for user equipment 10, the station Petition 870240092730, dated 10 / 30 / 2024, pp. 38 / 61 28 / 47 base 20 defines SS #2 for user equipment 10 as a timing reference and notifies user equipment 10 of the center frequency of SS #2. Notification of the center frequency of SS #2 can be performed simultaneously with, or independently of, notification of sub-band #3 + sub-band #4. Furthermore, even in a case where base station 20 determines a band indicated by B in Fig. 21 as a band (sub-band) for user equipment 10, base station 20 defines SS #2 for user equipment 10 as a timing reference and notifies user equipment 10 of a center frequency of SS #2.

[093] As described above, even in a case where base station 20 defines an arbitrary band (sub-band) for the user equipment based on the capacity information from user equipment 10, the method described with reference to Fig. 20 is also applicable to the case. For example, as illustrated in Fig. 20, in a case where four synchronization signals are transmitted, user equipment 10 detects SS #1 through cell search and is synchronized with base station 20. Furthermore, user equipment 10 notifies base station 20 of the capacity information regarding the maximum available bandwidth of user equipment 10.

[094] Base station 20 determines, for example, to configure a band, which corresponds to sub-band #1 + sub-band #2 including SS #1 in Fig. 20, for user equipment 10 based on the capability information of user equipment 10. Furthermore, base station 20 notifies user equipment 10 of the positions of both ends of sub-band #1 + sub-band #2 on a frequency axis in order to configure sub-band #1 + sub-band #2 including SS #1 for user equipment 10. For example, the notification can be carried out with P-BCH or other channels. Additionally, a notification content can be an absolute value of Petition 870240092730, dated 10 / 30 / 2024, pp. 39 / 61 29 / 47 a frequency, a frequency number, or an offset, as described above.

[095] In case B of Fig. 18 (in a case of determining a center frequency by sub-banding), the assignment (allocation) of a resource to user equipment 10 from base station 20 can be performed by notifying a center frequency (or frequencies at both ends) of a sub-band and a PRB index in the sub-band from base station 20 to user equipment 10. For example, the notification can be performed using a PDCCH. User equipment 10, which receives the center frequency (or frequencies at both ends) of the sub-band and the PRB index in the sub-band, can pick up an RB, which is indicated by the PRB index, from the center frequency (or frequencies at both ends) and the maximum available bandwidth of user equipment 10, and can perform data communication (transmission or reception) using the RB.Furthermore, base station 20 can notify user equipment 10 of the center frequency (or frequencies at both ends) of the sub-band, using an RRC message, a MAC control element, or other signals. Then, at a stage where user equipment 10 performs data communication, base station 20 can notify user equipment 10 of a PRB index for resource assignment with the PDCCH.

[096] In a case of D in Fig. 18 (in a case of determining an arbitrary band (sub-band)), resource assignment (allocation) from base station 20 to user equipment 10 can be performed by notifying a maximum available bandwidth of the sub-band, the center frequency (or frequencies at both ends) of the sub-band, and a PRB index in the sub-band from base station 20 to the equipment. Petition 870240092730, dated 10 / 30 / 2024, pp. 40 / 61 30 / 47 of user 10. For example, notification can be performed using PDCCH. User equipment 10, which receives the notification, can capture an RB, indicated by the PRB index, from the center frequency (or frequencies at both ends) and the maximum available bandwidth, and can perform data communication (transmission or reception) using the RB. Additionally, base station 20 can notify user equipment 10 of the maximum available bandwidth of the sub-band and the center frequency (or frequencies at both ends) of the sub-band, using an RRC message or a MAC control element. Then, at a stage where user equipment 10 performs data communication, base station 20 can notify user equipment 10 of a PRB index for resource allocation with PDCCH.When base station 20 notifies user equipment 10 of the maximum available bandwidth of the sub-band, and the center frequency (or frequencies at both ends) of the sub-band using the RRC message or the MAC control element, notification of the maximum available bandwidth of the sub-band and notification of the center frequency (or frequencies at both ends) of the sub-band can be performed simultaneously, or can be performed at different notification times.

[097] Furthermore, in a case where base station 20 notifies user equipment 10 of the frequencies at both ends of the subband, the maximum available bandwidth may not be notified. The reason for this is that the maximum available bandwidth can be calculated from the frequencies at both ends.

[098] In any of the cases of center frequency designation (or frequencies at both ends) with the PDCCH, or a case of center frequency designation (or frequencies at both ends) Petition 870240092730, dated 10 / 30 / 2024, pp. 41 / 61 31 / 47 with the RRC message or the MAC control element, in a case where the center frequency used in user equipment 10 is changed, user equipment 10 performs retuning to the center frequency after the change.

[099] Each of the central frequencies and the frequencies at both ends, which are reported from base station 20 to user equipment 10, may be an absolute value of a frequency, a frequency number, or other pieces of information indicating the frequency. <Com relação a DL e UL>

[100] As described above, the processing contents in relation to the center frequency, the maximum available bandwidth and similar in the column of<Exemplo Detalhado de Operação de Alocação de Recursos> (hereinafter referred to as the detailed example) can be applied to DL and can be applied to UL. Furthermore, the processing content described in the detailed example can be applied to both DL and UL, or it can be applied to DL only or UL only.

[101] In a case where the radio communication system of this mode is operated in TDD, the designation of the center frequency (or frequencies at both ends) of base station 20 for user equipment 10 can be applied only to the DL, and a center frequency (or frequencies at both ends) of the DL can be used for the center frequency (frequencies at both ends) of the UL. Furthermore, in a case where the radio communication system of this mode is operated in TDD, the designation of the center frequency (or frequencies at both ends) of base station 20 for user equipment 10 can be applied only to the UL, and the center frequency (or frequencies at both ends) of the UL can be used in relation to the center frequency (the Petition 870240092730, dated 10 / 30 / 2024, pp. 42 / 61 32 / 47 frequencies at both ends) of the DL.

[102] Furthermore, for example, in a case where the radio communication system of this mode is operated in FDD, a center frequency interval Δ (e.g., the center frequency in the DL - the center frequency in the UL) between the DL and the UL can be determined in advance. In this case, when the center frequency designation (referred to as DLCF) of the DL is received from base station 20, user equipment 10 can determine DLCF - Δ as the center frequency of the UL without designation of the UL center frequency. Furthermore, when the center frequency designation (referred to as ULCF) of the UL is received from base station 20, user equipment 10 can determine ULCF + Δ as the center frequency of the DL without designation of the DL center frequency.

[103] In the case described above, with respect to the unassigned center frequency of the UL or DL, base station 20 picks up the UL or DL ​​center frequency in the same way as user equipment 10. When assigning a resource with respect to user equipment 10 in a sub-band to which the unassigned center frequency of the UL or DL ​​belongs, base station 20 can give a notification of the UL or DL ​​PRB index without designating the center frequency.

[104] In any of the cases described above, with respect to the maximum available bandwidth, user equipment 10 may use the maximum available bandwidth of the same. Furthermore, in a case where a maximum available bandwidth of UL is assigned from base station 20, user equipment 10 may use the bandwidth as a maximum available bandwidth of DL. Furthermore, in a case where the maximum available bandwidth of DL is assigned from base station 20, user equipment 10 may use the bandwidth Petition 870240092730, dated 10 / 30 / 2024, pp. 43 / 61 33 / 47 as the maximum available bandwidth from UL.

[105] As described above, according to this embodiment, user equipment 10 can flexibly use a band (e.g., 800 MHz in Fig. 18) with a bandwidth that is provided in the radio communication system without performing the CA according to the capacity of user equipment 10 (e.g., B and D in Fig. 18 and similar). (Device Configuration)

[106] A description will be given of an example of a functional configuration of user equipment 10 and base station 20 that perform the operation of this mode as described above. <Equipamento de Usuário 10>

[107] Fig. 22 is a view illustrating an example of a functional configuration of the user equipment 10. As illustrated in Fig. 22, the user equipment 10 includes a signal transmission unit 101, a signal reception unit 102, and a resource control unit 103. The functional configuration illustrated in Fig. 22 is for illustrative purposes only. A functional classification or name of the functional units may be arbitrarily defined provided that operation according to this mode can be performed. For example, the resource control unit 103 may be divided into a reception side and a transmission side, the resource control unit 103 on the transmission side may be included in the signal transmission unit 101, and the resource control unit 103 on the reception side may be included in the signal reception unit 102.

[108] Signal transmission unit 101 is configured to convert data, which must be transmitted from user equipment 100, into a signal that is transmitted wirelessly, and to wirelessly transmit the signal. Signal reception unit 102 is configured to wirelessly receive various signals and to Petition 870240092730, dated 10 / 30 / 2024, pp. 44 / 61 34 / 47 acquire data from the signals that are received. In addition, the signal transmission unit 101 and the signal reception unit 102 include the synchronous operation function and the function of performing center frequency retuning as described above with reference to Fig. 19 to Fig. 21 and similar.

[109] Resource control unit 103 creates capacity information of the maximum available bandwidth of user equipment 10 and transports the capacity information to signal transmission unit 101. In addition, the capacity information is transmitted by signal transmission unit 101. Furthermore, resource control unit 103 specifies a resource block that is used in a communication based on the center frequency (the frequencies at both ends), the resource block index and the like, which are received from the base station 20 through signal reception unit 102, and instructs signal transmission unit 101 or signal reception unit 102 to perform a communication using the resource block.Furthermore, resource control unit 103 can determine whether or not it resides in a cell of base station 20 based on the maximum available bandwidth, which is received from base station 20 through signal receiving unit 102 of base station 20. Additionally, resource control unit 103 can retain a center frequency range between the DL and UL, and upon receiving a center frequency from either DL or UL, resource control unit 103 can determine a center frequency on the other side based on the range.

[110] In addition, the signal transmission unit 101 can be configured to transmit a first maximum bandwidth (maximum available bandwidth), which is the maximum bandwidth that is available to the user equipment 10 in a communication, to the base station 20, and the signal reception unit 102 can be configured to receive, from Petition 870240092730, dated 10 / 30 / 2024, pp. 45 / 61 35 / 47 base station 20, a center frequency or frequencies at both ends of a band with a bandwidth that is equal to or less than the first maximum bandwidth, in a band with a second maximum bandwidth that is the maximum bandwidth available to base station 20 in a communication. That is, a center frequency or frequencies at both ends in a band having the second maximum bandwidth are received from base station 20.

[111] In addition, the signal receiving unit 102 can be configured to receive information, which designates a resource in a band with a bandwidth equal to or less than the first maximum bandwidth, from the base station 20 in combination with the center frequency or frequencies at both ends or separately from the center frequency or frequencies at both ends and the signal transmitting unit 101 and / or the signal receiving unit 102 can be configured to perform data communication using the resource. <Estação base 200>

[112] Fig. 23 is a view illustrating an example of a functional configuration of base station 20. As illustrated in Fig. 23, base station 20 includes a signal transmission unit 201, a signal reception unit 202, a resource control unit 203, and a resource allocation unit 204. The functional configuration illustrated in Fig. 23 is for illustrative purposes only. A functional classification or name of the functional units may be arbitrarily defined provided that operation according to this mode can be performed.

[113] Signal transmission unit 201 is configured to convert data, which must be transmitted from base station 20, into a signal that must be transmitted wirelessly, and to wirelessly transmit the signal. The receiving unit Petition 870240092730, dated 10 / 30 / 2024, pp. 46 / 61 Signal unit 202 (36 / 47) is configured to wirelessly receive multiple signals and to acquire data from a received signal. Additionally, signal transmission unit 201 and signal reception unit 202 are capable of communication between multiple user devices while switching on a central frequency relative to the user devices. Furthermore, signal transmission unit 201 includes the synchronous operation function described in Figs. 19 to 21 and similar figures.

[114] Resource control unit 203 is configured to split a band with the maximum available bandwidth of base station 20, and to determine a center frequency in a band that has the maximum available bandwidth of user equipment 10 based on the band having the maximum available bandwidth and the maximum available bandwidth of user equipment 10.

[115] In addition, the signal receiving unit 201 is configured to receive the maximum available bandwidth from user equipment 10 as capacity information, and the signal transmitting unit 202 is configured to transmit the center frequency or frequencies at both ends, which are determined by the resource control unit 203, of the band to user equipment 10.

[116] Resource allocation unit 204 is configured to determine a resource that is used in a communication on user equipment 10 and to carry a resource block index and similar that indicate the resource to signal transmission unit 201. Signal transmission unit 201 transmits the index and similar to user equipment 10. <Configuração de Hardware>

[117] The block diagrams (Fig. 22 and Fig. 23) that are used in Petition 870240092730, dated 10 / 30 / 2024, pp. 47 / 61 37 / 47 Description of the embodiment illustrates blocks of a function unit. The function blocks (constituent units) are realized by an arbitrary combination of hardware and / or software. Furthermore, means of realizing the respective function blocks are not particularly limited. That is, the respective function blocks can be realized by a device in which a plurality of elements are physically and / or logically combined. In addition, two or more devices, which are physically and / or logically separated from each other, can be directly and / or indirectly (e.g., wired and / or wirelessly) connected, and the respective function blocks can be realized by a plurality of the devices.

[118] Furthermore, for example, user equipment 10 and base station 20 of this embodiment can function as a computer that performs processing according to this embodiment. Fig. 24 is a view illustrating an example of a hardware configuration of user equipment 10 and base station 20 according to this embodiment. User equipment 10 and base station 20 can be configured as a computer device that physically includes a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[119] Furthermore, in the following description, a device term may be replaced by a circuit, a unit, and the like. The hardware configuration of the user equipment 10 and the base station 20 may include the respective devices, which are indicated by reference numbers 1001 to 1006 in the drawing, one by one or in a plural number, or may not include a portion of the devices.

[120] Their respective functions in user equipment 10 and base station 20 are performed because of the hardware, such as processor 1001 and the Petition 870240092730, dated 10 / 30 / 2024, pp. 48 / 61 38 / 47 memory 1002 to read predetermined software (program) in order to allow the processor 1001 to perform an arithmetic operation and controlling communication through the communication device 1004 and reading and / or inputting data into memory 1002 and storage 1003.

[121] For example, the 1001 processor allows an operating system to operate in order to control the entire computer. The 1001 processor may consist of a central processing unit (CPU) which includes an interface with a peripheral device, a control device, an arithmetic operation device, a register and the like.

[122] In addition, the processor 1001 reads a program (program code), a software module or data from storage 1003 and / or the communication device 1004 into memory 1002, and performs various types of processing according to the program, the software module or the data. As the program, a program is used that allows the computer to perform at least a part of the operations described in the modality. For example, the signal transmission unit 101, the signal reception unit 102, and the resource control unit 103 of user equipment 10 can be implemented by a control program that is stored in memory 1002 and operated by processor 1001. Furthermore, the signal transmission unit 201, the signal reception unit 202, the resource control unit 203, and the resource allocation unit 204 of base station 20 can be implemented by a control program that is stored in memory 1002 and operated by processor 1001.The various types of processing described above are designed to be performed by a 1001 processor, but can be performed simultaneously or sequentially by two or more 1001 processors. The 1001 processor... Petition 870240092730, dated 10 / 30 / 2024, pp. 49 / 61 39 / 47 can be assembled by one or more chips. Furthermore, the program can be transmitted over a network via an electrical communication line.

[123] Memory 1002 is a computer-readable recording medium and may consist, for example, of at least a Read-Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a random access memory (RAM) and the like. Memory 1002 may be referred to as a register, a cache, a main memory (main storage device) and the like. Memory 1002 may hold a program (program code), a software module, and the like which may be executed to perform processing according to the embodiment of the invention.

[124] Storage 1003 is a computer-readable recording medium and may consist of at least one of, for example, an optical disc such as a compact disc ROM (CD-ROM), a hard disk drive, a floppy disk, a magneto-optical disc (e.g., a compact disc, a digital multipurpose disc and a Blu-ray disc (trademark)), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk (trademark), a magnetic strip and the like. Storage 1003 may be referred to as an auxiliary storage device. For example, the storage medium described above may be a database including memory 1002 and / or storage 1003, a server and other suitable media.

[125] The 1004 communication device is hardware (transmission and reception device) that performs communication between computers via a wire and / or a radio network, and may be referred to as, for example, a network device, a network controller, a network card, a communication module and the like. For example, the transmission unit Petition 870240092730, dated 10 / 30 / 2024, pages 50 / 61 The 40 / 47 signal transmission unit 101 and the signal reception unit 102 of the user equipment 10 can be implemented by the communication device 1004. Furthermore, the signal transmission unit 201 and the signal reception unit 202 of the base station 20 can be implemented by the communication device 1004.

[126] Input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. Output device 1006 is an output device (e.g., a monitor, a speaker, an LED lamp, and the like) that performs the output to the outside. Furthermore, input device 1005 and output device 1006 may have an integral configuration (e.g., a touch panel).

[127] Furthermore, the respective devices, including the processor 1001, the memory 1002, and the like, are connected to each other via a bus 1007 for information communication. The bus 1007 can be configured as a single bus or it can be configured as a bus that is different between devices.

[128] In addition, user equipment 100 and base station 200 may include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field-programmable gate array (FPGA), or part or all of the respective function blocks may be implemented by the hardware. For example, processor 1001 may be assembled from at least one piece of hardware. (Summary of the Modality)

[129] As described above, according to this embodiment, user equipment is provided in a radiocommunication system including the user equipment and a base station. The user equipment includes: Petition 870240092730, dated 10 / 30 / 2024, pp. 51 / 61 41 / 47 a transmitting unit that transmits a first maximum bandwidth, which is the maximum bandwidth available to the user equipment in a communication, to the base station; and a receiving unit that receives, from the base station, a center frequency or frequencies at both ends of a band having a bandwidth that is equal to or less than the first maximum bandwidth, in a band having a second maximum bandwidth that is the maximum bandwidth available to the base station in a communication.

[130] According to this configuration, the user equipment can flexibly use a band that has a bandwidth that is provided in a radio communication system according to the capacity of the user equipment.

[131] The receiving unit may receive information, which designates a resource in a band having a bandwidth equal to or less than the first maximum bandwidth, from the base station in combination with the center frequency or frequencies at both ends or separately from the center frequency or frequencies at both ends and the transmitting unit or the receiving unit may perform data communication using the resource. According to this configuration, the user equipment may perform data communication using a resource in a band (sub-band) to which the center frequency belongs.

[132] The information, which is received from the base station by the receiving unit and designates the resource, can be an index that is applied to a block of resources in a band having a bandwidth equal to or less than the first maximum bandwidth. According to this configuration, it is possible to give a notification of a resource, for example, in a quantity of information. Petition 870240092730, dated 10 / 30 / 2024, pp. 52 / 61 42 / 47 smaller.

[133] The receiving unit can receive an integer value, which indicates the second maximum bandwidth, from the base station. According to this configuration, the user equipment can capture the second maximum bandwidth. Furthermore, an integer value is used and, therefore, it is possible to express the second maximum bandwidth in a fine granularity.

[134] In addition, according to this modality, a base station is provided in a radio communication system including user equipment and the base station.The base station includes: a receiving unit that receives a first maximum bandwidth, which is the maximum bandwidth available to the user equipment in a communication, from the user equipment; a resource control unit that determines a center frequency and frequencies at both ends of a band having a bandwidth equal to or less than the first maximum bandwidth based on a band with a maximum bandwidth that is the maximum bandwidth available to the base station in a communication and the first maximum bandwidth that is received by the receiving unit; and a transmitting unit that transmits the center frequency or the frequencies at both ends, which are determined by the resource control unit, to the user equipment.

[135] According to this configuration, the user equipment can flexibly use a band that has a bandwidth that is provided in a radio communication system according to the capacity of the user equipment. (Supplement to the Modality)

[136] Above, the embodiment of the invention has been described. However, the invention described is not limited to the embodiment, and should be understood Petition 870240092730, dated 10 / 30 / 2024, pp. 53 / 61 43 / 47 Those skilled in the art may find that various examples of modification, variation, alternative, substitution, and the like can be made. The description has been made using a specific numerical example for the understanding of the invention, but the numerical values ​​are only illustrative and arbitrary appropriate values ​​may be used unless otherwise indicated. The classification of items in the description above is not essential to the invention, and details described in two or more items may be used in combination as needed. Furthermore, details described in any item may be applied to details described in a different item (provided that inconsistency does not occur). The boundary of the functional units in the functional block diagram or in the processing units cannot be said to correspond to a boundary of physical components.Operations on a plurality of functional units can be physically performed with one component, or an operation on a single functional unit can be physically performed with a plurality of components. In the procedure described in this embodiment, a processing order can be altered as long as no inconsistency occurs. User equipment 10 and base station 20 were described using functional block diagrams for convenience in explaining the processing, but the devices can be implemented by hardware, software, or a combination thereof.Software that operates via the processor supplied to the user equipment 10 according to the embodiment of the invention, and the software that operates via the processor supplied to the base station 20 according to the embodiment of the invention may be stored respectively in a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk drive (HDD), a removable disk, a CD-ROM, a database, a server or other storage media. Petition 870240092730, dated 10 / 30 / 2024, pp. 54 / 61 44 / 47 appropriate.

[137] Information notification may be performed by other methods, without limitation to the aspect and modality described in this descriptive report. For example, information notification may be performed by physical layer signaling (e.g., downlink control information (DCI), and uplink control information (UCI)), upper layer signaling (e.g., radio resource control (RRC) signaling, medium access control (MAC) and broadcast information (main information block (MIB) and system information block (SIB))), other signals, or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, and examples thereof include an RRC connection configuration message, an RRC connection reconfiguration message, and the like.

[138] The aspect and modality that are described in this descriptive report can be applied to long-term evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G, 5G, future radio access (FRA), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, ultra-mobile broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, ultra-wideband (UWB), Bluetooth (registered trademark), other systems that use a suitable system and / or a next-generation system that is extended based on the systems.

[139] In the procedure, sequence, flowchart, and similar items in appearance and manner that are described in this descriptive report, their order may be altered, provided that no inconsistency occurs. For example, with regard to the method described in this descriptive report, elements of various steps are suggested in an exemplary order, and there is no limitation to the specific order that is suggested. Petition 870240092730, dated 10 / 30 / 2024, pp. 55 / 61 45 / 47

[140] In this descriptive report, a specific operation that is performed by base station 20 can be performed by a higher node (upper node) according to the circumstances. In a network including one or a plurality of network nodes including base station 20, it is evident that several operations that are performed for communication with a user device 10 can be performed by base station 20 and / or another network node (for example, MME, S-GW, and similar are considered, but there is no limitation to this) in addition to base station 20. In the description above, a case is exemplified where another network node different from base station 20 is one, but a combination (e.g., MME and S-GW) of a plurality of other network nodes is also possible.

[141] The aspects and modality described in this descriptive report may be used alone or in combination with each other, or may be switched and used according to the execution.

[142] User equipment 10 may be referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, an apparatus, a user agent, a mobile client, a client, or some other terms suitable to those skilled in the art.

[143] Base station 20 may be referred to as a B Node (NB), an enhanced B Node (eNB), or various other terms suitable to those skilled in the art.

[144] The term determine as used in this descriptive report may include several operations. For example, the term determine may include relating to judgment, calculation, computation, processing, derivation, investigation, query (e.g., query, in a table, a database of Petition 870240092730, dated 10 / 30 / 2024, pp. 56 / 61 46 / 47 data or other data structures), or verification as determined and similar. Furthermore, determining can include relating to receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, or access (e.g., accessing data in a memory) as determined, and similar. Additionally, determining can include the matter of resolving, selecting, choosing, establishing, comparing, or similar as determining. That is, determining includes relating to any operation as determined.

[145] The description of based on this descriptive report does not represent only based on unless otherwise indicated. In other words, the description of on the basis of represents both only based on and at least based on.

[146] In cases where include, including, and a modification thereof are used in this descriptive report and the appended claims, these terms are understood to be comprehensive terms similar to including (comprising). Furthermore, a term (or) that is used in this descriptive report and the appended claims is not intended to be used as an exclusive logical sum.

[147] In the entirety of the present description, for example, in a case where articles such as a, an and the are added in the translation, the articles are intended to include a plural form provided that the opposite intention is not clearly indicated from the context.

[148] Previously, the invention was described in detail, but it is evident to those skilled in the art that the invention is not limited to the embodiment described above in this descriptive report. The invention can be carried out in a variation aspect and in a modification aspect without departing from the essence or scope of the invention as determined by the description of the claims. Petition 870240092730, dated 10 / 30 / 2024, pp. 57 / 61 attached. Consequently, the description in this descriptive report is made for illustrative purposes only and has no limiting significance with respect to the invention.

[149] This application is based on and claims priority to Japanese patent application No. 2016-192357 filed on September 29, 2016, and Japanese patent application No. 2016-203120 filed on October 14, 2016, and the entire contents of Japanese patent application ηρ2016-192357 and Japanese patent application nQ2016-203120 are incorporated herein by reference. EXPLANATIONS OF LETTERS OR NUMBERS User Equipment Base station 101 Signal transmission unit 102 Signal reception unit 103 Resource control unit 201 Signal transmission unit 202 Signal reception unit 203 Resource control unit 204 Resource allocation unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input Device 1006 Output Device Petition 870240092730, dated 10 / 30 / 2024, pp. 58 / 61

Claims

1 / 2 CLAIMS 1. Terminal (10) characterized in that it comprises: a transmission unit (101) configured to transmit, to a base station (20), capacity information of a maximum bandwidth that the terminal (10) supports;and a receiving unit (102) configured to receive, from the base station (20), information designating a downlink bandwidth portion that the terminal (10) uses, the designated downlink bandwidth portion comprising a plurality of sub-bands, wherein the receiving unit (102) is configured to receive, from the base station (20), a frequency of a synchronization signal corresponding to the designated downlink bandwidth portion, the plurality of sub-bands of the designated downlink bandwidth portion being synchronizable with said synchronization signal, and wherein a bandwidth of the downlink bandwidth portion is configurable in resource block units.

2. Terminal (10), according to claim 1, characterized in that the information designating the bandwidth portion includes a location in the frequency domain and a bandwidth of the bandwidth portion.

3. Terminal (10), according to claim 1 or 2, characterized in that the receiving unit (102) is configured to receive information designating a portion of the uplink bandwidth that the terminal (10) uses.

4. Terminal (10), according to claim 1, characterized in that the terminal (10) is configured to use the bandwidth in resource block units as a bandwidth of the downlink bandwidth. Petition 870260064434, dated 06 / 30 / 2026, page 12 / 15 2 / 2 5. A communication method executed by a terminal (10) characterized in that it comprises: transmitting, to a base station (20), capacity information of a maximum bandwidth that the terminal (10) supports; and receiving, from the base station (20), information designating a portion of the downlink bandwidth that the terminal (10) uses, the designated downlink bandwidth portion comprising a plurality of sub-bands, the method further comprising receiving, from the base station (20), a frequency of a synchronization signal corresponding to the designated downlink bandwidth portion, the plurality of sub-bands of the designated downlink bandwidth portion being synchronizable with said synchronization signal, and wherein a bandwidth of the downlink bandwidth portion is configurable in resource block units. Petition 870260064434, dated 06 / 30 / 2026, p. 13 / 15

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