Terminal and base station

Abstract

In one aspect of the present invention, a base station includes an index generation unit configured to generate an index indicating a time-domain location of a synchronization signal block where a synchronization signal or a physical broadcast channel is placed; and a transmission unit configured to transmit a portion of the index using one or more synchronization signals—a primary synchronization signal, a secondary synchronization signal, and a tertiary synchronization signal—and transmit a remaining portion of the index using the physical broadcast channel.

Description

1 / 28 TERMINAL AND BASE STATION Technical field

[001] The present invention relates to a base station and a method for transmitting a synchronization signal. Fundamentals of the technique

[002] As initial access to a carrier provided by a base station (eNB: Evolved B Node) in Long Term Evolution (LTE), a user equipment (UE: user equipment) detects synchronization signals (SS) called a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) and then demodulates a physical broadcast channel (PBCH).

[003] Figure 1 is a diagram illustrating a frame structure for initial access in LTE. In LTE, two sets of PSS and SSS are multiplexed into a 10 ms radio frame, and a PBCH is multiplexed along with one of the two sets. The PSS is typically used for symbol timing synchronization and local ID detection. The SSS is typically used for radio frame synchronization and cell group ID detection. When synchronization is established and a cell ID is identified using the PSS and SSS, a PBCH from a carrier corresponding to the cell ID can be decoded. The PBCH includes basic information such as a system bandwidth, a system frame number (SFN), and so on. When the PSS, SSS, and PBCH are detected, a system information block (SIB) can subsequently be received and a location of a time resource for random access can be obtained (see Unpatented Document 1). [PRIOR TECHNICAL DOCUMENT] [UNPATENTED DOCUMENT] [Unpatented Document 1] 3 GPP TS 36.212 V14.1.1 (2016-12) Petition 870190072698, dated 07 / 29 / 2019, pages 132 / 163 2 / 28 Dissemination of the invention [PROBLEM(S) TO BE SOLVED BY THE INVENTION]

[004] In the Third Generation Partnership Project (3GPP), a next-generation system called 5G, which follows LTE and LTE-Advanced, is currently under discussion.

[005] In LTE, a single-beam operation, in which a beam direction is fixed during initial access, is supported. In a next-generation system, it is expected that a single-beam operation, in which a PSS, an SSS, and a PBCH are repeatedly transmitted in the time domain without changing the beam direction, as well as a multi-beam operation (also referred to as beam scanning), in which a PSS, an SSS, and a PBCH are repeatedly transmitted changing the beam direction, will be supported. For a user equipment device to receive a SIB and obtain a location of a time resource for random access after detecting a PSS, an SSS, and a PBCH, the user equipment needs to identify, for the PSS, the SSS, and the PBCH that were detected, the number of PSS, SSS, and PBCH that were transmitted within a repetition period.For this reason, a base station needs to provide the user equipment with an index (hereinafter referred to as an SS block index) indicating a location in the time domain of a resource (hereinafter referred to as an SS block) where the PSS, SSS, and PBCH are placed.

[006] In LTE, the information needed for SIB reception and random access can be transmitted on a PBCH. In a next-generation system, as the amount of information such as an SFN and the number of cell IDs can increase, providing an SS block index on the PBCH can cause a shortening of the PBCH payload size. On the other hand, providing an SS block index using PSS and SSS can increase the payload. Petition 870190072698, dated 07 / 29 / 2019, pages 133 / 163 3 / 28 of the user equipment's workload is affected because the user equipment needs to detect a combination of a cell ID and the SS block index at once.

[007] It is an object of the present invention to provide an SS block index to a user equipment device while avoiding the lack of a payload size of a PBCH and reducing a workload of the user equipment device during initial access. [METHODS FOR SOLVING THE PROBLEM(S)]

[008] In one aspect of the present invention, there is provision for a base station, including:

[009] an index generation unit configured to generate an index indicating a time domain location of a synchronization signal block where a synchronization signal or a physical broadcast channel is placed; and

[0010] a transmission unit configured to transmit a portion of the index using one or more synchronization signals from among a primary synchronization signal, a secondary synchronization signal, and a tertiary synchronization signal and transmit a remaining portion of the index using the physical broadcast channel. [ADVANTAGEOUS EFFECT OF THE INVENTION]

[0011] According to the present invention, it is possible to provide an SS block index for a user equipment device while avoiding a shortening of a payload size of a PBCH and reducing a workload of the user equipment device during initial access. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a diagram illustrating a frame structure for initial access in LTE. Petition 870190072698, dated 07 / 29 / 2019, pages 134 / 163 4 / 28

[0013] Figure 2 is a diagram illustrating an exemplary configuration of a radio communication system according to an embodiment of the present invention.

[0014] Figure 3A is a diagram illustrating a first exemplary frame structure for initial access assuming that a multi-beam operation is supported.

[0015] Figure 3B is a diagram illustrating a second exemplary frame structure for initial access assuming that a multi-beam operation is supported.

[0016] Figure 4 is a sequence diagram illustrating a communication procedure in a radio communication system according to an embodiment of the present invention.

[0017] Figure 5A is a diagram illustrating a first exemplary (1-1) SS block structure.

[0018] Figure 5B is a diagram illustrating a first exemplary structure (1-2) of SS blocks.

[0019] Figure 5C is a diagram illustrating an exemplary first provisioning scheme for an SS block.

[0020] Figure 6A is a diagram illustrating a second exemplary (2-1) SS block structure.

[0021] Figure 6B is a diagram illustrating a second exemplary (2-2) SS block structure.

[0022] Figure 6C is a diagram illustrating a second exemplary (2-3) SS block structure.

[0023] Figure 6D is a diagram illustrating a second exemplary (2-4) SS block structure.

[0024] Figure 6E is a diagram illustrating a second structure Petition 870190072698, dated 07 / 29 / 2019, pages 135 / 163 5 / 28 copy (2-5) of SS blocks.

[0025] Figure 6F is a diagram illustrating a second exemplary provisioning scheme for an SS block.

[0026] Figure 7 is a block diagram illustrating a functional configuration of a base station according to an embodiment of the present invention.

[0027] Figure 8 is a block diagram illustrating a functional configuration of a user equipment device according to an embodiment of the present invention.

[0028] Figure 9 is an exemplary hardware configuration of a base station or user equipment device according to an embodiment of the present invention. Detailed description of preferred options

[0029] Hereafter, embodiments of the invention will be described with reference to the accompanying drawings. The embodiments described below are merely examples and embodiments of the invention are not limited to the following embodiments. Although the embodiments are described using the terms defined in LTE, for example, the invention is not limited to LTE, but may also be applied to other systems. In the descriptive report and the accompanying claims, LTE is used in a broad sense including not only a communication system corresponding to Version 8 or 9 of 3GPP, but also a communication system corresponding to Version 10, 11, 12 or 13 of 3GPP and a fifth-generation communication system corresponding to Version 14 or later of 3GPP. <CONFIGURAÇÃO DE SISTEMA>

[0030] Figure 2 is a conceptual diagram of an exemplary configuration of a radio communication system according to an embodiment of Petition 870190072698, dated 07 / 29 / 2019, pages 136 / 163 6 / 28 present invention. As illustrated in Figure 2, the radio communication system according to the embodiment of the present invention includes an eNB base station and a UE user equipment device. While a single eNB base station and a single UE user equipment device are illustrated in Figure 2, a plurality of eNB base stations or a plurality of UE user equipment devices may be included.

[0031] The eNB base station can accommodate one or more (e.g., three) cells (also called sectors). When the eNB base station accommodates a plurality of cells, the entire coverage area of ​​the eNB base station can be divided into a plurality of small areas, and in each small area, a communication service can be provided through a base station subsystem (e.g., a small internal base station remote radio terminal (RRH)). The term cell or sector refers to a portion or the entire coverage area in which the base station and / or the base station subsystem provides a communication service. Furthermore, the terms base station, eNB, cell, and sector may be used interchangeably in this descriptive report. In some cases, the eNB base station is also referred to as a fixed station, a Node, an eNode (ENB), a gNode (GNB), an access point, a femto cell, a small cell, or similar.

[0032] In some cases, the UE user equipment device is 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, a handset, a user agent, a mobile client, a client, or any other term suitable by Petition 870190072698, dated 07 / 29 / 2019, pages 137 / 163 7 / 28 experts in the technique.

[0033] Next, the initial access between the user equipment and the base station is described below.

[0034] The user equipment device needs to perform a cell search to communicate with the base station. The signals used for cell search are called synchronization signals (SS), which include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). In addition, a newly defined synchronization signal (hereinafter referred to as a tertiary synchronization signal (TSS)) may also be used. A sequence to identify a local ID is used for the PSS and a sequence to identify a cell group ID is used for the SSS. A cell ID can be identified by a combination of the local ID and the cell group ID. In the embodiment of the present invention, the combination of the local ID and the cell group ID is used to identify a cell ID; however, another ID may be used alternatively.For example, a cell ID can be identified only by the sequence used for the PSS or the sequence used for the SSS. Each of the sequences used for the PSS and SSS can be formed by a Zadoff-Chu sequence or similar. Similarly, the sequence used for the TSS can be formed by a Zadoff-Chu sequence or similar.

[0035] Basic information that the UE user equipment device must read after cell scanning is referred to as broadcast information, which includes a Master Information Block (MIB) including a system bandwidth, a system frame number, and so on, and a System Information Block (SIB) including other types of system information. The MIB can be transmitted on a PBCH and the SIB can be transmitted on a shared physical downlink channel (PDSCH). Petition 870190072698, dated 07 / 29 / 2019, pages 138 / 163 8 / 28

[0036] The PSS, SSS, TSS, and PBCH are placed in an SS block at a predetermined resource location. In other words, an SS block is a resource that includes the PSS, SSS, TSS, and PBCH. In the radio communication system according to the embodiment of the present invention, it is assumed that in addition to single-beam operation, multi-beam operation is supported during initial access.

[0037] Figures 3A and 3B are diagrams illustrating an exemplary frame structure for initial access assuming that a repetitive transmission is performed in the time domain. In these examples, it is assumed that a multi-beam operation is applied. When the multi-beam operation is applied, SS blocks are repeatedly placed in the time domain, changing the beam direction. It should be noted that SS blocks can be repeatedly placed in the time domain even if a single-beam operation instead of the multi-beam operation is applied. A group of SS blocks continuously placed in the time domain is referred to as an SS burst. The SS burst can be transmitted periodically or aperiodically.

[0038] An SS block index indicating a time-domain location of an SS block (e.g., a location of the first SS block symbol in the SS burst) is assigned to the SS block. Figure 3A illustrates an example where SS block indices are assigned on a burst-by-SS basis. For example, indices starting from zero are sequentially assigned to L SS blocks in an SS burst, and then the same indices starting from zero are also sequentially assigned to SS blocks in a subsequent SS burst. Figure 3B illustrates an example where a series of SS bursts that is a group of SS bursts is defined and SS block indices are assigned on a burst-by-SS series basis. For example, indices Petition 870190072698, dated 07 / 29 / 2019, pages 139 / 163 9 / 28 starting from zero are sequentially assigned to L SS blocks in an SS burst, and then indices starting from L are sequentially assigned to SS blocks in a subsequent SS burst.

[0039] When an operation using an SS burst is supported, the user equipment device can detect an SS block with an SS block index of zero or an SS block with an SS block index of one. In either of the frame structures of Figures 3A and 3B, the user equipment device can use the SS block index to identify the time domain location of the detected SS block within the radio frame. <PROCEDIMENTO DE COMUNICAÇÃO NO SISTEMA DE COMUNICAÇÃO DE RÁDIO>

[0040] Next, an example is described in which a base station transmits a portion of an SS block index using one or more SS from a PSS, an SSS, and a TSS, and transmits the remaining portion of the SS block index using a PBCH.

[0041] Figure 4 is a sequence diagram illustrating a communication procedure in a radio communications system according to an embodiment of the present invention.

[0042] The base station generates an SS block index to be assigned to an SS block and, within the SS block, transmits at least one of a PSS, an SSS, and a TSS including a portion of the SS block index and transmits a PBCH including the remaining portion of the SS block index (S101). When the SS block index portion is included in the PSS or SSS, a remaining sequence of the PSS or SSS may be used. For example, nine hundred and sixty-one sequences may be generated as an SSS in LTE; however, the SSS is used as a sequence to identify one of the one hundred and sixty-eight group IDs. Petition 870190072698, dated 07 / 29 / 2019, pp. 140 / 163 10 / 28 of cells. In other words, for an SSS in LTE, (nine hundred and sixty-one minus one hundred and sixty-eight) remaining sequences are available. Similarly, for a PSS, remaining sequences are available. As a sequence indicating the SS block index portion, these remaining sequences can be used. Furthermore, the fact that remaining sequences are available for both the PSS and the SSS means that the resources for both the PSS and the SSS are available. Within the available resources, a new sequence can be defined to indicate the SS block index portion.

[0043] When the SS block index portion is transmitted using PSS, the sequence indicating the SS block index portion and a local ID to identify a cell ID are multiplexed in the code domain, frequency domain, or time domain. Similarly, when the SS block index portion is transmitted using SSS, the sequence indicating the SS block index portion and a cell group ID to identify a cell ID are multiplexed in the code domain, frequency domain, or time domain. When the SS block index portion is transmitted using TSS, a new sequence indicating the SS block index portion can be defined. The sequence indicating the SS block index portion can be transmitted using PSS, SSS, TSS, or any combination thereof. The sequence indicating the remaining SS block index portion is transmitted using PBCH.

[0044] For example, two hundred and forty SS block indices can be expressed as a first sequence that can represent twenty types of information and a second sequence that can represent twelve types of information. For example, the first sequence is transmitted using PBCH and the second sequence is transmitted using one or more SS of the PSS, the SSS, and the TSS. In other words, the second sequence can be included in the PSS, the SSS, or the Petition 870190072698, dated 07 / 29 / 2019, pages 141 / 163 11 / 28 Furthermore, it is possible to express the second sequence as a combination of a third sequence that can represent two types of information and a fourth sequence that can represent six types of information, including the third sequence in one of the PSS, the SSS, and the TSS, and including the fourth sequence in another of the PSS, the SSS and the TSS. It is also possible to express the second sequence as a combination of a fifth sequence that can represent two types of information, a sixth sequence that can represent two types of information, and a seventh sequence that can represent three types of information, and including the fifth sequence, sixth sequence, and seventh sequence in the PSS, SSS, and TSS, respectively.

[0045] The user equipment device detects the SS block index portion included in one or more PSS SS, the SSS, and the TSS at the time of cell ID detection using the PSS and SSS. The user equipment device also detects the remaining SS block index portion at the time of PBCH detection. The user equipment device detects the SS block index by combining the SS block index portion included in one or more PSS SS, the SSS, and the TSS and the remaining SS block index portion included in the PBCH (S103). As a result, the user equipment device can use the SS block index to identify the time-domain location of the SS block within the radio frame.

[0046] Next, the user equipment device can receive a SIB or similar and initiate random access (S105). <PRIMEIRO ESQUEMA DE PROVISIONAMENTO EXEMPLAR DO ÍNDICE DE BLOCO DE SS>

[0047] Figures 5A-5C are diagrams illustrating early exemplary SS block structures and early exemplary provisioning schemes for an SS block index. Figure 5A illustrates an example. Petition 870190072698, dated 07 / 29 / 2019, pages 142 / 163 12 / 28 (exemplary structure 1-1) in which sets of SS blocks including PSS, SSS, or PBCH are placed with a predetermined spacing in the time domain. Figure 5B illustrates an example (exemplary structure 1-2) in which a set of SS blocks including a PSS, an SSS, and a PBCH is placed continuously in the time domain. An example is described below with reference to the case (exemplary provisioning scheme 1-1 in Figure 5C) where a sequence indicating a portion of an SS block index is included in an SSS.

[0048] It is assumed that a base station can transmit one or more SS blocks, and generate an SS sequence to be transmitted in an SS block, including information to identify a cell group ID and a sequence indicating a portion of an SS block index.

[0049] The user equipment device can identify the information to identify the cell group ID and the SS block index portion of an SSS sequence included in a detected SS block. Additionally, the user equipment device can identify the remaining SS block index portion by decoding a PBCH.

[0050] The base station can scramble the sequence indicating the SS block index portion using the sequence to identify the cell group ID. Correspondingly, the user equipment device can detect the cell group ID and then detect the SS block index portion. Alternatively, the base station can scramble the sequence to identify the cell group ID using the sequence indicating the SS block index portion. Correspondingly, the user equipment device can detect the SS block index portion and then detect the cell group ID.

[0051] A similar procedure can be applied to the case (scheme) Petition 870190072698, dated 07 / 29 / 2019, pp. 143 / 163 13 / 28 of exemplary provisioning 1-2 in Figure 5C) where a sequence indicating a portion of an SS block index is included in a PSS. Furthermore, a similar procedure can also be applied to the case (exemplary provisioning scheme 1-3 in Figure 5C) where a sequence indicating a portion of an SS block index is included in both a PSS and an SSS. <SEGUNDO ESQUEMA DE PROVISIONAMENTO EXEMPLAR DO ÍNDICE DE BLOCO DE SS>

[0052] Figures 6A-6F are diagrams illustrating exemplary second SS block structures and exemplary second provisioning schemes of an SS block index. Figure 6A illustrates an example (exemplary structure 2-1) where sets of SS blocks including PSS, SSS, TSS, or PBCH are placed with a predetermined spacing in the time domain. Figure 6B illustrates an example (exemplary structure 2-2) where a set of SS blocks including a PSS, an SSS, a TSS, and a PBCH are placed continuously in the time domain. Figure 6C illustrates an example (exemplary structure 2-3) where sets of SS blocks are placed with a predetermined spacing in the time domain and a set of SS blocks is placed continuously in the time domain. Figures 6D and 6E illustrate examples (exemplary structures 2-4 and 2-5) where frequency multiplexing is used in part of a PSS / SSS / TSS / PBCH.An example is described below with reference to the case (exemplary provisioning scheme 2-1 in Figure 6F) where a sequence indicating a portion of an SS block index is included in a TSS.

[0053] It is assumed that a base station can transmit one or more SS blocks, and generate a TSS sequence to be transmitted in an SS block, including a sequence indicating a portion of an SS block index.

[0054] The user equipment device can identify the portion of Petition 870190072698, dated 07 / 29 / 2019, pages 144 / 163 14 / 28 SS block index from a TSS sequence included in a detected SS block. Additionally, the user equipment device can identify the remaining portion of the SS block index by decoding a PBCH.

[0055] The base station can scramble the sequence indicating the SS block index portion using the sequence to identify a local ID or a cell group ID. Correspondingly, the user equipment device can detect the local ID or cell group ID, and then detect the SS block index portion. Alternatively, the base station can scramble the sequence to identify the local ID or cell group ID using the sequence indicating the SS block index portion. Correspondingly, the user equipment device can detect the SS block index portion, and then detect the local ID or cell group ID.

[0056] A similar procedure can be applied to the case (exemplary provisioning scheme 2-2 in Figure 6F) where a sequence indicating a portion of an SS block index is included in both a PSS and a TSS. Furthermore, a similar procedure can also be applied to the case (exemplary provisioning scheme 2-3 in Figure 6F) where a sequence indicating a portion of an SS block index is included in both an SSS and a TSS. Additionally, a similar procedure can also be applied to the case (exemplary provisioning scheme 2-4 in Figure 6F) where a sequence indicating a portion of an SS block index is included in a PSS, an SSS, and a TSS.

[0057] It should be noted that an exemplary structure of a PSS, an SSS, a TSS, and a PBCH to provide an SS block index is not limited to Figures 5A-5B and 6A-6E; clearly, the PSS, the SSS, the TSS, and the PBCH can be placed anywhere in one or more SS blocks. Petition 870190072698, dated 07 / 29 / 2019, pp. 145 / 163 15 / 28<CONFIGURAÇÃO DA ESTAÇÃO BASE>

[0058] Figure 7 is a block diagram illustrating a functional configuration of a base station 10 according to an embodiment of the present invention. The base station 10 includes an SS block index generation unit 101, a PSS sequence generation unit 103, an SSS sequence generation unit 105, a TSS sequence generation unit 107, a PBCH generation unit 109, and a transmission unit 111. The names of these functional units in Figure 7 are merely examples, and these functional units may be named differently. For example, when a portion of an SS block index is transmitted using a PSS and a remaining portion of the SS block index is transmitted using a PBCH, the SS block index generation unit 101, the PSS sequence generation unit 103, and the PBCH generation unit 109 may be collectively referred to as an SS block index generation unit.

[0059] The SS 101 block index generation unit generates an SS block index to be assigned to an SS block.

[0060] The PSS 103 sequence generation unit combines a sequence indicating a portion of an SS block index and a sequence to identify a local ID to generate a PSS sequence when the SS block index portion is transmitted using a PSS.

[0061] The SSS 105 sequence generation unit combines a sequence indicating a portion of an SS block index with a sequence to identify a cell group ID to generate an SSS sequence when the SS block index portion is transmitted using an SSS.

[0062] The TSS 107 sequence generation unit generates a TSS sequence indicating a portion of an SS block index when the SS block index portion is transmitted using a TSS. When a TSS is not used, Petition 870190072698, dated 07 / 29 / 2019, pages 146 / 163 16 / 28 the TSS 107 sequence generation unit does not need to be included in base station 10.

[0063] The PBCH 109 generation unit generates a sequence indicating a remaining portion of the SS block index and introduces the sequence to a PBCH payload.

[0064] Transmission unit 111 transmits the generated PSS sequence, the generated SSS sequence, the generated TSS sequence, the PBCH, or any combination thereof in the SS block. <CONFIGURAÇÃO DO APARELHO DE EQUIPAMENTO DE USUÁRIO>

[0065] Figure 8 is a block diagram illustrating a functional configuration of a user equipment apparatus 20 according to an embodiment of the present invention. The user equipment apparatus 20 includes a receiving unit 201, a PSS sequence estimation unit 203, an SSS sequence estimation unit 205, a TSS sequence estimation unit 207, a PBCH receiving processing unit 209, and an SS block estimation unit 211. The names of these functional units in Figure 8 are only examples, and these functional units may be named differently.

[0066] Receiving unit 201 receives a signal transmitted from a base station.

[0067] The PSS sequence estimation unit 203 detects the timing of a PSS reception based on the signal received by the reception unit 201. The PSS sequence estimation unit 203 detects a local ID and also detects a portion of an SS block index when the portion of the SS block index is included in a PSS sequence.

[0068] The SSS 205 sequence estimation unit detects a cell group ID based on the signal received by the 201 receiving unit and Petition 870190072698, dated 07 / 29 / 2019, pages 147 / 163 17 / 28 also detects a portion of an SS block index when that portion of the SS block index is included in an SSS sequence.

[0069] The TSS 207 sequence estimation unit detects a portion of an SS block index when the SS block index portion is included in a TSS sequence. When a TSS is not used, the TSS 207 sequence estimation unit does not need to be included in the user equipment device 20.

[0070] The PBCH 209 reception processing unit decodes a PBCH from a carrier matching the cell ID identified by a combination of the local ID and the cell group ID. Then, the PBCH 209 reception processing unit detects a remaining portion of the SS block index.

[0071] The SS 211 block index estimation unit estimates the SS block index by combining the portion of the SS block index detected by the PSS 203 sequence estimation unit, the SSS 205 sequence estimation unit, or the TSS 207 sequence estimation unit and the remaining portion of the SS block index detected by the PBCH 209 reception processing unit. <CONFIGURAÇÃO DE HARDWARE >

[0072] The block diagrams used to describe the aforementioned embodiment illustrate blocks of functional units. The functional blocks (components) are implemented by an arbitrary combination of hardware and / or software. A means of implementing each functional block is not particularly limited. That is, each functional block can be implemented by a device in which a plurality of elements are physically and / or logically coupled or by a plurality of devices that are physically and / or logically separated from each other and are connected directly and / or Petition 870190072698, dated 07 / 29 / 2019, pages 148 / 163 18 / 28 indirectly (for example, in a wired and / or wireless way).

[0073] For example, base station 10, user equipment device 20, or the like according to the embodiment of the invention may function as a computer that executes a method of transmitting a synchronization signal according to this embodiment. Figure 9 is a diagram illustrating an example of a hardware configuration of base station 10 or user equipment device 20 according to this embodiment. Each of the base station 10 and user equipment device 20 may be physically configured as a computing device including, for example, a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0074] In the following description, the term device may be replaced with, for example, a circuit, an apparatus, or a unit. The hardware configuration of base station 10 or user equipment apparatus 20 may include one or a plurality of devices illustrated in Figure 9 or may not include some of the devices.

[0075] Each function of the base station 10 and the user equipment device 20 can be implemented by the following process: predetermined software (program) is read into the hardware such as the processor 1001 or the memory 1002, and the processor 1001 executes an operation to control the communication of the communication device 1004 and the reading and / or writing of data to and / or from the memory 1002 and the storage 1003.

[0076] Processor 1001 operates, for example, an operating system to control the overall operation of the computer. Processor 1001 may be a central processing unit (CPU) including, for example, an interface with peripheral devices, a control device, a device Petition 870190072698, dated 07 / 29 / 2019, pp. 149 / 163 19 / 28 arithmetic and a register. For example, the SS 101 block index generation unit, the PSS 103 sequence generation unit, the SSS 105 sequence generation unit, the TSS 107 sequence generation unit, the PBCH 109 generation unit, the PSS 203 sequence estimation unit, the SSS 205 sequence estimation unit, the TSS 207 sequence estimation unit, the PBCH 209 reception processing unit, the SS 211 block index estimation unit, and so on, can be implemented in the 1001 processor.

[0077] Processor 1001 reads a program (program code), a software module, and / or data from storage 1003 and / or communication device 1004 into memory 1002 and executes various types of processes according to the program, software module, or data. A program that causes a computer to perform at least some of the operations described in the embodiment can be used. For example, the SS 101 block index generation unit in base station 10 can be implemented by a control program that is stored in memory 1002 and executed by processor 1001. The other functional blocks can be implemented similarly. In the embodiment, the various processes mentioned above are performed by one processor 1001. However, the processes can be performed simultaneously or sequentially by two or more processors 1001. Processor 1001 can be mounted on one or more chips.The program can be transmitted over the network via a telecommunications line.

[0078] Memory 1002 is a computer-readable recording medium and may include, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), and a random access memory (RAM). Petition 870190072698, dated 07 / 29 / 2019, pages 150 / 163 20 / 28 Memory 1002 can also be referred to as, for example, a register, a cache, or main memory (main storage device). Memory 1002 can store, for example, an executable program (program code) and a software module that can execute a method of transmitting a synchronization signal according to the embodiment of the invention.

[0079] Storage 1003 is a computer-readable recording medium and may include, for example, at least one of 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 versatile disc, or a Blu-ray disc (trademark)), a smart card, a flash memory (e.g., a card, a rod, or a key drive), a floppy disk (trademark), and a magnetic strip. Storage 1003 may also be referred to as an auxiliary storage device. The aforementioned storage medium may be, for example, a database, a server, and other suitable media, including memory 1002 and / or storage 1003.

[0080] The communication device 1004 is hardware (a transmitting and receiving device) for communicating with a computer over a wired and / or wireless network and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. For example, the transmitting unit 111, the receiving unit 201 and the like can be implemented by the communication device 1004.

[0081] Input device 1005 is an input unit (for example, a keyboard, a mouse, a microphone, a switch, a button, or a sensor) that receives input from the outside. Output device Petition 870190072698, dated 07 / 29 / 2019, pages 151 / 163 21 / 28 1006 is an output unit (e.g., a screen, a speaker, or an LED lamp) that performs an output process to the outside. Input device 1005 and output device 1006 can be integrated into a single device (e.g., a touch-sensitive panel).

[0082] Devices such as processor 1001 and / or memory 1002 are connected to each other via bus 1007 for information communication. Bus 1007 may be a single bus or devices may be connected to each other via different buses.

[0083] Each of the base station 10 and user equipment device 20 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). Some or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware components. <EFEITOS DAS MODALIDADES>

[0084] According to one embodiment of the present invention, it is possible to provide an SS block index to a user equipment device, avoiding a shortening of a PBCH payload size and reducing the user equipment device's workload during initial access. Specifically, since the SS block index is transmitted using a PSS, an SSS, or a TSS, in addition to the PBCH, a shortening of the PBCH payload size can be avoided. Furthermore, as only a portion of the SS block index is transmitted using the PSS, the SSS, or the TSS, the sequence range to be detected by the user equipment can be limited and, consequently, the user equipment's workload during initial access can be reduced. It should be noted that the TSS can Petition 870190072698, dated 07 / 29 / 2019, pages 152 / 163 22 / 28 is not necessary because the TSS occupies additional resources. Even if the TSS is used, according to one embodiment of the present invention, the number of resources for the TSS can be reduced. In this way, the workload of the user equipment device for detecting SS and the amount of information to be transmitted in the PBCH can be optimized.

[0085] Furthermore, when a PSS, an SSS, a TSS, and a PBCH are multiplexed into an SS sequence as illustrated in Figures 5B and 6B-6D, a user equipment device that can decode the PBCH in an SS burst at an early stage in a series of SS bursts can immediately proceed with receiving SIB or similar signals. <EXPLICAÇÃO SUPLEMENTAR>

[0086] Each aspect / modality described in the descriptive report can be applied to systems that utilize Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G, 5G, Future Radio Access (FRA), WCDMA (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), and other suitable systems and / or next-generation systems that have enhanced functionality based on these systems.

[0087] The terms system and network used in the descriptive report are used interchangeably.

[0088] In the descriptive report, a specific operation performed by the base station may be performed by a higher-level node of the base station. In a network having one or a plurality of network nodes including the base station, it is clearly understood that various operations performed for communication with the user equipment device may be performed by the base station and / or a network node (e.g., including MME or an S-GW without limitation). Petition 870190072698, dated 07 / 29 / 2019, pages 153 / 163 23 / 28 other than the base station. The number of network nodes other than the base station is not limited to one, and a plurality of other network nodes (e.g., an MME and an S-GW) can be combined with each other.

[0089] Information or similar may be transmitted from an upper layer (or a lower layer) to a lower layer (or an upper layer). Information or similar may be introduced or transmitted through a plurality of network nodes.

[0090] Input or output information or similar information may be stored in a specific location (e.g., memory) or may be managed in a management table. Input or output information or similar information may be overwritten, updated, or edited. Output information or similar information may be erased. Input information or similar information may be transmitted to another device.

[0091] Information transmission is not limited to the aspects / modalities described in the descriptive report and may be performed by other means. For example, information transmission may be performed by physical layer signaling (e.g., downlink control information (DCI) or uplink control information (UCI)), upper layer signaling (e.g., radio resource control (RRC) signaling, medium access control (MAC) signaling, or broadcast information (a master information block (MIB) and a system information block (SIB))), other signaling, or a combination thereof. RRC signaling may also be referred to as an RRC message and may be, for example, an RRC connection configuration message or an RRC connection reconfiguration message.

[0092] The determination can be made based on a value (0 or 1) Petition 870190072698, dated 07 / 29 / 2019, pages 154 / 163 24 / 28 represented by 1 bit, can be based on a true or false value (Boolean: true or false), or it can be based on a numerical value (for example, comparison with a predetermined value).

[0093] Regardless of whether the software is called software, firmware, middleware, microcode, hardware description language, or some other name, software is broadly interpreted to include an instruction, a set of instructions, code, a code segment, program code, a program, a subprogram, a software module, an application, a software application, a software package, a routine, a subroutine, an object, an executable file, an execution thread, a procedure, a function, or the like.

[0094] Software, an instruction, or the like may be transmitted or received through a transmission medium. For example, when software is transmitted from a site, server, or other remote source using a wired technology such as a coaxial cable, a fiber optic cable, a twisted pair, and a digital subscriber line (DSL) and / or a wireless technology such as infrared, radio, and microwave, the wired technology and / or the wireless technology is included in the definition of a transmission medium.

[0095] The information, signal, and similar elements described in the descriptive report may be represented using any of several technologies. For example, the data, instruction, command, information, signal, bit, symbol, chip, and similar elements mentioned throughout the description may be represented by a voltage, a current, an electromagnetic wave, a magnetic field, or a magnetic particle, an optical field or a photon, or any combination thereof.

[0096] The terms described in the descriptive report and / or terms necessary to understand the descriptive report may be replaced by terms that Petition 870190072698, dated 07 / 29 / 2019, pages 155 / 163 25 / 28 have the same or similar meanings. For example, a channel and / or a symbol can be a signal. A signal can be a message. A component carrier (CC) can be referred to as a carrier frequency, a cell, or similar.

[0097] The information, parameter, or similar described in the descriptive report may be represented by an absolute value, may be represented by a relative value of a predetermined value, or may be represented by another piece of corresponding information. For example, a radio feature may be indicated using an index.

[0098] The names used for the parameters described above are not limited in any respect. Furthermore, a numerical or similar expression in which the parameters are used may differ from the numerical expression explicitly disclosed in the descriptive report. Since various channels (e.g., a PUCCH and a PDCCH) and information elements (e.g., TPC) may be identified with any suitable names, various names allocated to the various channels and information elements are not limited in any respect.

[0099] The terms determine and decide used in the descriptive report include various operations. The terms determine and decide may include, for example, determination and decision to calculate, compute, process, derive, investigate, search (e.g., looking up a table, a database, or another data structure), and the operations of determination. In addition, the terms determine and decide may include determination and decision to receive (e.g., receiving information), transmit (e.g., transmitting information), input, output, and access (e.g., accessing data in memory). The terms determine and decide may include determination and decision to resolve, select, choose, Petition 870190072698, dated 07 / 29 / 2019, pages 156 / 163 26 / 28 establish and compare operations. That is, the terms determine and decide can include determination and decision for any operation.

[00100] The term "based on" used in the descriptive report does not mean "only based on," unless otherwise indicated. In other words, the term "based on" means "based only on" and "at least based on."

[00101] When reference is made to elements in which the terms first, second, and the like are used in the descriptive report, the number or order of the elements is not generally limited. These terms may be used in the descriptive report as a method of conveniently distinguishing two or more elements from one another. Consequently, reference to first and second elements does not imply that only two elements are employed or that the first element precedes the second element in some ways.

[00102] The terms include and include and their modifications are intended to be inclusive, similarly to the term comprise, provided they are used in the descriptive report or claims. Furthermore, the term or used in the descriptive report or claims does not mean exclusive OR.

[00103] In each aspect / modality described in the descriptive report, for example, the order of processes in the procedure, the sequence, and the flowchart may be altered unless a contradiction arises. For example, for the method described in the descriptive report, elements of various steps are presented in the order exemplified. However, the invention is not limited to the specific order presented.

[00104] The aspects / modalities described in the descriptive report may be used individually, may be combined, or may be Petition 870190072698, dated 07 / 29 / 2019, pp. 157 / 163 27 / 28 switched during execution. Furthermore, the transmission of predetermined information (e.g., transmission of being X) is not limited to being executed explicitly, but can be performed implicitly (e.g., the transmission of predetermined information is not executed).

[00105] The invention has been described in detail above. It will be evident to those skilled in the art that the invention is not limited to the embodiments described in the descriptive report. Various modifications and alterations may be made without departing from the scope and spirit of the invention described in the claims. Therefore, the embodiments described in the descriptive report are illustrative and do not limit the invention.

[00106] This international patent application is based on and claims the benefit of priority of Japanese Patent Application No. 2017019141, filed on February 3, 2017, the entire content of which is incorporated herein by reference. [NOTATION DESCRIPTION] base station 101 SS block index generation unit 103 PSS sequence generation unit 105 SSS sequence generation unit 107 TSS sequence generation unit 109 PBCH generation unit 111 transmission unit user equipment device 201 reception unit 203 PSS sequence estimation unit 205 SSS sequence estimation unit 207 TSS sequence estimation unit Petition 870190072698, dated 07 / 29 / 2019, pages 158 / 163 28 / 28 209 PBCH receiving processing unit 211 SS block index estimation unit 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device 1007 bus Petition 870190072698, dated 07 / 29 / 2019, pages 159 / 163

Claims

1 / 1 CLAIMS 1. Terminal (20) characterized in that it comprises: a receiving unit (201) that receives at least one of a known sequence and broadcast information in a synchronization signal block where a synchronization signal and a physical broadcast channel are placed; and a control unit (211) that determines a portion of an index of the synchronization signal block based on the known sequence and determines a remaining portion of the index of the synchronization signal block based on the broadcast information.

2. Terminal, according to claim 1, characterized in that the known sequence is one of a plurality of sequences transmitted in the synchronization signal block.

3. Terminal, according to claim 1 or 2, characterized in that the control unit synchronizes with a base station using a known sequence.

4. Base station (10) characterized in that it comprises: a control unit (101, 103, 105, 107, 109) which includes in broadcast information a portion of an index of a synchronization signal block where a synchronization signal and a physical broadcast channel are placed; and a transmission unit (111) which transmits at least one of a known sequence and the broadcast information in the synchronization signal block, wherein the known sequence is used to determine a remaining portion of the index of the synchronization signal block. Petition 870250049404, dated 12 / 06 / 2025, page 13 / 13

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