WO2022254531A1 - Wireless communication node and wireless communication method - Google Patents

Abstract

This wireless communication node transmits a plurality of synchronization signals having different configurations, and sets at least one of the plurality of synchronization signals on the basis of the function or connection state of the wireless communication node.

Description

Wireless communication node and wireless communication method

The present disclosure relates to wireless communication nodes and wireless communication methods compatible with flexible networks and mesh networks.

The 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with

In 6G, there are various use cases such as higher required performance, ultra-coverage extension/ultra-long-distance communication, super-large capacity, super-reliable communication, user centric no cell, flexible network, mesh network/sidelink, etc. It is assumed (Non-Patent Document 1).

Regarding the initial access of wireless communication nodes (which may include terminals (User Equipment, UE), wireless base stations (gNB, etc., which may be also known as other names), and communication devices that constitute Integrated Access and Backhaul (IAB)), such A design that considers the characteristics of 6G is inevitable.

In flexible networks and mesh networks, flexible arrangement of network functions is expected along with various network topologies.

For this reason, wireless communication nodes such as terminals need to quickly and reliably establish synchronization with various entities (which may be read as wireless communication nodes) that provide different functions.

Therefore, the following disclosure is made in view of such circumstances, and aims to provide a wireless communication node and a wireless communication method that can quickly and reliably establish synchronization with various entities that provide different functions. do.

One aspect of the present disclosure is a transmitting unit (control signal/reference signal processing unit 140) that transmits a plurality of synchronization signals having different configurations, and based on the function or connection state of a wireless communication node, It is a wireless communication node (NW node 100) including a control unit (control unit 170) that sets at least one of them.

One aspect of the present disclosure includes a transmission/reception unit (radio signal transmission/reception unit 110) that transmits and receives a radio signal, and a control unit (control unit 170) that sets transmission timing and reception timing of the radio signal. , a wireless communication node (NW node 100) that assumes that the reception timings of all the wireless signals in the wireless communication nodes match, and sets the transmission timings according to the reception timings.

One aspect of the present disclosure includes transmitting a plurality of synchronization signals having different configurations, and setting at least one of the plurality of synchronization signals based on the function or connection state of a wireless communication node. A wireless communication method comprising:

One aspect of the present disclosure includes the steps of transmitting and receiving radio signals, and setting transmission timings and reception timings of the radio signals, wherein the setting step includes receiving timings of all the radio signals in a radio communication node. match, and the transmission timing is set according to the reception timing.

FIG. 1 is an overall schematic configuration diagram of a radio communication system 10. As shown in FIG. FIG. 2 is a functional block configuration diagram of NW node 100 and UE 200. As shown in FIG. FIG. 3 is a diagram illustrating a timing example (option 1) of a transmission signal according to operation example 1; FIG. 4 is a diagram illustrating a timing example (option 2) of a transmission signal according to operation example 1; FIG. 5 is a diagram illustrating a timing example (option 3 (part 1)) of a transmission signal according to operation example 1. In FIG. FIG. 6 is a diagram illustrating a timing example (option 3 (part 1)) of a transmission signal according to operation example 1. In FIG. FIG. 7 is a diagram illustrating a configuration example of a radio link between nodes including (a node corresponding to) a gNB according to operation example 1. FIG. FIG. 8 is a diagram illustrating a timing example (including a propagation delay difference) of a transmission signal according to Operation Example 1. FIG. FIG. 9 is a diagram illustrating an example (option 1) of transmission timings of radio signals according to operation example 2. In FIG. FIG. 10 is a diagram illustrating an example (option 2) of transmission timings of radio signals according to operation example 2. In FIG. FIG. 11 is a diagram illustrating an example (option 3) of transmission timings of radio signals according to operation example 2. In FIG. FIG. 12 is a diagram showing an example of the hardware configuration of the NW node 100 and UE200.

Hereinafter, embodiments will be described based on the drawings. The same or similar reference numerals are given to the same functions and configurations, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Radio Communication System FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment. In this embodiment, the radio communication system 10 is a radio communication system that follows a scheme called Beyond 5G, 5G Evolution, or 6G, which succeeds 5G New Radio (NR).

As shown in FIG. 1, the wireless communication system 10 may be composed of multiple wireless communication nodes. Specifically, the wireless communication system 10 may be configured by a plurality of network nodes 100 (hereinafter NW nodes 100) and terminals 200 (User Equipment 200, hereinafter UE 200). Note that the radio communication system 10 may include a core network (not shown) connected to an external network or the like, and part (or all) of the radio access network configured by the core network and/or radio communication nodes is It may simply be expressed as a "network".

The NW node 100 and UE 200 are a type of wireless communication node capable of wireless communication. Note that the NW node 100 and the UE 200 are both wireless communication nodes and need not be clearly distinguished. That is, NW node 100 and UE 200 may function as network nodes or UEs (or both) depending on the type of communication, applications being executed, state of communication, location, and the like.

A wireless communication node may be called by another name that means a device that performs wireless communication (mobile communication), such as a node, network entity, network device, or communication device, in addition to NW node and user device.

Also, the function of such a wireless communication node may be provided while being mounted on various mobile objects. For example, as shown in FIG. 1, wireless communication nodes may be mounted on aircraft 40, drones 50, vehicles 60, and the like.

The aircraft 40 is a vehicle that flies through the air carrying people and objects, and may include balloons, airships, gliders, airplanes, helicopters, and the like. The altitude at which the aircraft 40 can fly is not particularly limited, but an altitude of up to 10,000 m may be assumed.

The drone 50 flies in the air like the aircraft 40, but may be interpreted as an unmanned aircraft that flies remotely or automatically. However, the drone 50 does not necessarily have to be unmanned, remotely operated, or automatically controlled. Also, in general, the flying altitude of the drone 50 may be lower than that of the aircraft 40 . Drones 50 may also be referred to as Unmanned Aerial Vehicles (UAVs).

The vehicle 60 may be interpreted as a vehicle that travels on land by power, such as an automobile. Vehicles 60 may include vehicles that run on tracks, such as trains. Note that the wireless communication node may be mounted not only on land but also on ships on the sea.

Also, the wireless communication node may be mounted on a geostationary satellite (GEO: Geostationary Orbit), a low earth orbit satellite (LEO: Low Earth Orbit), or a high-altitude pseudosatellite (HAPS: High-Altitude Platform Station). It should be noted that the HAPS can reside in a fixed location at an altitude of about 20 km and may form a large cell radius (eg, 50 km or more) coverage area over land.

In this way, the wireless communication system 10 can support coverage extension including non-terrestrial networks.

Also, the wireless communication node may function as a wireless relay device interposed between other wireless communication nodes. A radio relay device may be called a relay or repeater, and integrates radio access to terminals (User Equipment, UE) and radio backhaul between radio communication nodes such as radio base stations (e.g., gNB). may be a component of an integrated access and backhaul (IAB).

The radio communication system 10 may support the same frequency band as NR, and may use the same bandwidth (BW) and subcarrier spacing (SCS). Additionally, the wireless communication system 10 may support even higher frequency bands. Specifically, the wireless communication system 10 may support high frequency bands such as millimeter waves above 10 GHz. Also, a bandwidth of about several 100 MHz may be applied.

Also, the wireless communication system 10 may support functions related to eMBB (enhanced Mobile Broadband), URLLC (Ultra-Reliable and Low Latency Communications), and mass connections (mMTC: massive Machine Type Communication), similar to NR. Also, similar to NR, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform-Spread (DFT-S-OFDM) with larger Sub-Carrier Spacing (SCS) may be applied.

Furthermore, in order to realize ultra-high-speed and large-capacity communication, FTN (Faster-than-Nyquist) signals, which compress and transmit signals in a non-orthogonal manner using a sampling rate larger than the frequency bandwidth in the time domain, may be used. good.

Note that the time domain may also be referred to as the time direction, time component, time domain, symbol period, symbol time, or the like. A symbol period may also be called a symbol length, a time direction, a time domain, or the like. The frequency domain may also be called frequency direction, frequency component, frequency domain, resource block, resource block group, subcarrier, BWP (Bandwidth part), subchannel, common frequency resource, and so on.

Also, like NR, the radio communication system 10 uses Massive MIMO (mMIMO), multiple component carriers (CC ), and dual connectivity (DC) in which communication is performed simultaneously between the UE and each of a plurality of wireless communication nodes.

As shown in FIG. 1, in a wireless communication system 10, each wireless communication node is connected to a plurality of wireless communication nodes at the same time to form a mesh network (mesh network) capable of forming various connection paths (communication paths). may be

In addition, as described above, the functions (or roles) and types provided by each wireless communication node may be flexibly changed according to the situation, etc., and flexible network functions can be realized in combination with various network topologies. Arrangements may be implemented. Such networks may be referred to as flexible networks.

For example, in the radio access technology (RAT) adopted in the wireless communication system 10, distributed network advancement in the spatial domain, that is, communication in the shortest possible distance and line-of-sight environment (path with little loss), and as many communications as possible It may be possible to create paths and allow more room for path selection (increase redundancy).

In order to realize such a flexible network or mesh network, distributed antenna deployment that deploys a large number of antenna devices in a distributed manner, placement of reflectors (RIS: Reconfigurable Intelligent Surface) for the purpose of improving wireless performance, terminal ( A cooperative transmission/reception technique among wireless communication nodes may be applied.

(2) Functional Block Configuration of Radio Communication System Next, the functional block configuration of the radio communication system 10 will be described. Specifically, the functional block configuration of the NW node 100 will be described. FIG. 2 is a functional block configuration diagram of NW node 100 and UE 200. As shown in FIG.

As shown in FIG. 2, the NW node 100 includes a radio signal transmission/reception unit 110, an amplifier unit 120, a modulation/demodulation unit 130, a control signal/reference signal processing unit 140, an encoding/decoding unit 150, a data transmission/reception unit 160, and a control unit 170. Prepare.

Note that FIG. 2 only shows main functional blocks related to the description of the embodiment, and that the NW node 100 (UE 200) has other functional blocks (for example, a power supply unit, etc.). . Also, FIG. 3 shows the functional block configuration of the NW node 100, and please refer to FIG. 12 for the hardware configuration.

The radio signal transmitting/receiving unit 110 transmits/receives radio signals according to the 6G RAT. In this embodiment, the radio signal transmitting/receiving unit 110 may constitute a transmitting/receiving unit.

The radio signal transmitting/receiving unit 110 controls radio (RF) signals transmitted from multiple antenna elements to generate beams with higher directivity. Aggregation (CA) and dual connectivity (DC) in which communication is performed simultaneously between two NW nodes 100 (or UE 200) may be supported.

The amplifier unit 120 is configured by a PA (Power Amplifier)/LNA (Low Noise Amplifier) or the like. Amplifier section 120 amplifies the signal output from modem section 130 to a predetermined power level. Further, amplifier section 120 amplifies the RF signal output from radio signal transmission/reception section 110 .

The modulation/demodulation unit 130 executes data modulation/demodulation, transmission power setting, resource block allocation, etc. for each specific communication destination (UE 200).

The control signal/reference signal processing unit 140 executes processing related to various control signals that the NW node 100 transmits and receives. Specifically, the control signal/reference signal processing unit 140 receives various control signals transmitted from the UE 200 via the control channel, for example, radio resource control layer (RRC) control signals. Also, the control signal/reference signal processing unit 140 transmits various control signals to the UE 200 via the control channel.

The control signal may include downlink control information (DCI) and uplink control information (UCI).

DCI is interpreted as control information transmitted in the downlink (DL) including at least one of scheduling information, data modulation and channel coding rate information necessary for each UE 200 (or NW node 100) to demodulate data. may be

UCI includes uplink (UL) including at least one of ACK/NACK of hybrid ARQ (HARQ: Hybrid automatic repeat request), scheduling request (SR) from UE 200 (or NW node 100) and Channel State Information (CSI) may be interpreted as control information to be sent in

Furthermore, the control signal/reference signal processing unit 140 can perform processing using reference signals (RS) such as Demodulation Reference Signal and Phase Tracking Reference Signal (PTRS).

A DMRS is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.

In addition to DMRS and PTRS, reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS) for position information, and the like. .

Channels include control channels and data channels. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), and PBCH (Physical Broadcast Channel).

Data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). A signal may include a channel and a reference signal.

Although the names of the reference signals and channels are based on NR, they may be called by other names with the same meaning, and the names of the layers described later may also be called by other names with the same meaning. .

Also, the control signal may include a synchronization signal used for establishing synchronization between wireless communication nodes. The control signal/reference signal processing unit 140 can transmit a plurality of synchronization signals having different configurations. In this embodiment, the control signal/reference signal processing unit 140 may constitute a transmitting unit.

In the wireless communication system 10, different configurations (or types) of synchronization signals, that is, multiple types of synchronization signals may be used according to the functions, roles, operating states, positions, usage environments, etc. of wireless communication nodes. Alternatively, the synchronization signal may be the same regardless of the functions of the wireless communication node. Also, whether to use a plurality of synchronization signals properly or to use one synchronization signal may be instructed by the network. A configuration example of the synchronization signal will be described later.

Also, the control signal/reference signal processing unit 140 can receive synchronization signal information regarding such multiple types of synchronization signals. In this embodiment, the control signal/reference signal processing unit 140 may constitute a receiving unit.

Specifically, the control signal/reference signal processing unit 140 receives from a radio communication node equivalent to a radio base station (gNB) information necessary to establish synchronization with the radio communication node or other radio communication nodes. may receive. The information may include, for example, the time and/or frequency domain to which the synchronization signal is assigned, the signal sequence (number of bits, etc.), modulation scheme, coding rule, and the like.

The encoding/decoding unit 150 performs data division/concatenation, channel coding/decoding, etc. for each specific communication destination (UE 200).

Specifically, the encoding/decoding unit 150 divides the data output from the data transmission/reception unit 160 into pieces of a predetermined size, and performs channel coding on the divided data. In addition, encoding/decoding section 150 decodes the data output from modem section 130 and concatenates the decoded data.

The data transmission/reception unit 160 executes transmission/reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmission/reception unit 160 performs PDU/SDU in multiple layers (medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), etc.). Assemble/disassemble etc.

The control unit 170 controls each functional block that configures the NW node 100. In particular, in this embodiment, the control unit 170 executes control related to synchronization of the NW node 100. FIG.

Specifically, the control unit 170 can perform control necessary for the NW node 100 to establish synchronization with other wireless communication nodes. Establishing synchronization may mean that communication can be performed with a wireless communication node as a connection destination (communication destination) via a specific control channel or data channel. In other words, it may be interpreted as a state in which control data or user data can be transmitted or received in a specific time domain and/or frequency domain.

As described above, the wireless communication system 10 uses a plurality of synchronization signals, and the control unit 170 sets at least one of the plurality of synchronization signals based on the function or connection state of the wireless communication node. You can Here, the function of the wireless communication node may be the function of the own node (may include the role) or the function of the wireless communication node of the connection destination (which may not be connected yet). Also, the connection state may mean whether or not a connection is possible with a radio communication node equivalent to a radio base station (gNB), the number of radio communication nodes to be connected, the configuration of communication paths, the speed (delay), and the like.

Considering that a flexible network and/or a mesh network are configured in the wireless communication system 10, the control unit 170 may make the transmission timing of the synchronization signal different from the transmission timing of the synchronization signal in other wireless communication nodes. That is, the control unit 170 may apply individual synchronization signal transmission timing for each wireless communication node.

The control unit 170 sets at least one of a plurality of synchronization signals based on the synchronization signal information received via the control signal/reference signal processing unit 140, and determines the transmission timing of the synchronization signal from its own node. You can As described above, synchronization signal information transmitted from a radio communication node or the like equivalent to a radio base station (gNB) includes information necessary for setting the synchronization signal. The control unit 170 may set the synchronization signal based on the time domain and/or frequency domain information included in the synchronization signal information, and transmit the set synchronization signal at a predetermined transmission timing.

Also, the control unit 170 can set the transmission timing and reception timing of not only the synchronization signal but also the radio signal in which the control data or user data is coded and modulated. That is, the control unit 170 may set the transmission timing of the radio signal from its own node and the reception timing of the radio signal from the other node.

Specifically, the control unit 170 may assume that all wireless communication nodes in the wireless communication system 10 match (match) the transmission timings. In this case, the reception timing may be determined according to the transmission timing (the timing may be determined according to the propagation delay difference between nodes).

Alternatively, the control unit 170 may assume that all wireless communication nodes in the wireless communication system 10 match (match) the reception timings. In this case, the transmission timing may be determined according to the reception timing.

In addition, the control unit 170 assumes that the reception timings of all radio signals (which may be replaced with radio links, channels, etc.) in the radio communication node (the own node or another radio communication node that serves as a reference for establishing synchronization) are the same. Then, the transmission timing may be set according to the reception timing. The method of determining the transmission/reception timing of radio signals (radio link, channel) will be further described later.

Also, the function related to synchronization of the NW node 100 described above may be provided in the UE 200 as well.

(3) Operation of Radio Communication System Next, the operation of the radio communication system 10 will be described. Specifically, an operation example regarding synchronization between wireless communication nodes in the wireless communication system 10 will be described.

(3.1) Overview of operation Below, in a flexible network or a mesh network, etc., when one terminal (UE 200) is connected to a plurality of wireless communication nodes (hereinafter abbreviated as nodes as appropriate) with different functions, An example of operation that enables synchronization of

Specifically, the following operation example will be explained.

(Operation example 1): Method for establishing synchronization between nodes A wireless communication node may operate according to any of the following methods.

　　　・(i) Use a synchronous signal.

・(ii) A radio communication node (hereinafter referred to as gNB) equivalent to a radio base station (gNB) notifies other radio communication nodes (which may include UE 200) of information on synchronization between nodes (each if the node has the means to communicate directly or indirectly with the NB-equivalent wireless communication node).

　　　・(iii)Use a synchronization source implemented in the node, such as a global positioning system (GNSS).

　　　・(iv) A combination of (i) to (iii) above.

(Operation example 2): Method for determining radio signal (radio link) transmission/reception timing in each node A radio communication node may operate according to any of the following methods.

　　　・(i) All nodes match the transmission timing (they may be matched by the same method as for the synchronization signal). As for reception, it depends on the timing of transmission (the timing corresponds to the propagation delay difference between nodes).

　　　・(ii)Regarding transmission, it depends on the reception timing. As for reception, all nodes match the reception timing, or each node matches the reception timing.

　　　・(iii) The transmitting node determines the transmission timing (for example, the reception timing of the synchronization signal). As for reception, it depends on the timing of transmission (the timing corresponds to the propagation delay difference between nodes).

　　　・(iv) Both sending and receiving are asynchronous.

(3.2) Operation example 1
In this operation example, the configuration of the synchronization signal may be any of the following.

· All nodes transmit synchronization signals with the same configuration.

That is, all nodes may transmit synchronization signals composed of the same signal. For example, signals having the same frequency/time component, signal sequence/signal generation method, etc. as the synchronization signal may be used.

Also, the synchronization signal may contain information and/or settings specific to the node on the transmitting side. For example, identification information (ID) of the node may be included.

・A wireless communication node transmits synchronization signals with different configurations depending on the role, function, type (wireless base station/relay device/terminal, etc.) of the node, connection status (connection to the wireless base station), etc. .

For example, at least one of the frequency/time component of the synchronization signal, the signal sequence/signal generation method, etc. may be different. In other words, the synchronization signals (Sync 1, Sync 2 in Fig. 1) with at least part of the configuration (the sequence number for management may not be included) are different depending on the role of the node. good.

Also, the synchronization signal may contain information and/or settings specific to the node on the transmitting side. For example, identification information (ID), role, function, type, etc. of the node may be included.

The type of synchronization signal may be determined by the own node according to the role/function/type of the node, the connection state, and the presence or absence of the synchronization source signal (for example, whether or not the GNSS function is installed, or whether or not there is a radio link with the gNB). and may be determined by another node (eg, the connected node or gNB).

In addition, the transmission timing of radio signals (radio links) from nodes may be the same for all nodes, or may be different.

FIG. 3 shows a timing example (option 1) of a transmission signal according to operation example 1. FIG. 4 shows a timing example (option 2) of a transmission signal according to operation example 1. FIG.

In the case of (option 1), all nodes may transmit transmission signals at the same timing. In this case, any of the following transmission timing synchronization methods may be applied.

　　· Information about transmission timing (for example, propagation delay or information necessary to calculate propagation delay (Timing Advance (TA), Round-Trip Time (RTT), etc.) is notified.

This information may be notified from a reference node such as a node related to a radio link to be synchronized (it may be a connection destination node) or a gNB. Alternatively, other available means implemented in the node may be used, such as GNSS.

In the case of (option 2), each node may transmit a transmission signal at individual timing for each node.

In this case, each node determines the transmission timing of its own synchronization signal based on the reception timing of the synchronization signal received from the upper node, and determines the timing of the transmission signal according to the transmission timing of the synchronization signal. good.

For example, all nodes may transmit at the same temporal position (system frame number, slot or symbol, which may correspond to the same or (albeit with propagation delay) same) transmission timing will be delayed by the propagation delay between

Alternatively, each node may independently (individually) determine the transmission timing of the synchronization signal.

As for the transmission timing of the transmission signal, the transmission timing of the synchronization signal may be intentionally different (shifted) for each node.

FIG. 5 shows a timing example of a transmission signal (option 3 (1)) according to operation example 1. FIG. FIG. 6 shows a timing example (option 3 (1)) of a transmission signal according to operation example 1. FIG.

Specifically, FIG. 5 corresponds to option 1 shown in FIG. 3, and FIG. 6 corresponds to option 2 shown in FIG. In the timing examples shown in FIGS. 5 and 6, an offset in the time direction is added.

In the case of (option 3), half duplex communication is assumed for each node, and each node may avoid transmitting a synchronization signal at the same time it receives a synchronization signal.
A different transmission timing may be set for each node. The setting of the transmission timing may be notified from the connection destination node of the radio link to be synchronized, the gNB, or the like.

Also, multiple transmission timings may be set for a node. For example, both transmission timing common to all nodes and transmission timing individual to each node may be set.

Furthermore, each node may set multiple reception windows in order to monitor transmission timings of multiple synchronization signals. As the reception window, for example, a configuration similar to a measurement window that can be set for each carrier (which may also be called a subcarrier) called NR SSB based RRM Measurement Timing Configuration (SMTC) may be applied.

Also, as a method of dispersing the transmission and reception timings of each node, the DL/UL frequencies may be switched according to the connection state of the node or the number of connection hops from the reference node (eg, gNB). .

For example, between node A and node B, frequency A is assigned to DL (node B reception) and frequency B is assigned to UL (node B transmission). On the other hand, between Node B and Node C, frequency B may be assigned to DL (Node B transmission) and frequency A may be assigned to UL (Node B reception).

In addition, each node may independently determine the timing and conditions for transmission of the synchronization signal, or the start and/or stop of transmission of the synchronization signal may be explicitly specified by another node (connection destination node, gNB, etc.). (or implicitly) may be dictated.

When each node makes an individual decision, it may be based on the timing at which it receives information on transmission of a synchronization signal (or a radio signal (or radio link)) and the transmission of the synchronization signal becomes possible.

Alternatively, conditions for transmitting the synchronization signal may be defined. For example, whether or not to transmit the synchronization signal may be determined according to the synchronization accuracy of the own node (whether or not it is synchronized with the gNB or GNSS).

Also, the priority of the synchronization signal may be set. For example, synchronization signals transmitted by nodes that have a direct or indirect connection with a gNB or have a synchronization source such as GNSS may be set with high priority. For example, when the local node synchronizes with a synchronization signal having a high priority as a reference, the local node may also transmit the synchronization signal. In such a case, the synchronization signal may contain information regarding the priority.

Also, when a synchronization signal is not used, (the node corresponding to) the gNB may notify other nodes (which may include the UE 200) of information on synchronization between nodes (synchronization signal information). The notification of the information may be broadcast by system information (SIB), or may be realized by signaling such as RRC.

FIG. 7 shows a configuration example of a radio link between nodes including (a node corresponding to) a gNB according to Operation Example 1. Note that Nodes 1 to 3 (wireless communication nodes) shown in FIG. 7 may correspond to the NW node 100 or may correspond to the UE 200.

As shown in FIG. 7, when Nodes 1 to 3 each have a radio link with gNB, that is, a means of communication, gNB notifies each node of information on propagation delay difference when synchronizing between nodes. You can Each node has a radio link with the gNB (see dotted line) and establishes synchronization between each node (see solid line).

FIG. 8 shows a timing example (including a propagation delay difference) of transmission signals according to Operation Example 1. FIG. The gNB (which may be another node) may, for example, derive the propagation delay from the TA (eg, it may be the difference of TA/2 for each node).

Alternatively, the gNB may derive the propagation delay from the reception timing difference of signals to which TA is not applied (such as PRACH).

It may be assumed that the information about the propagation delay difference to be notified can take both positive and negative values. For example, it could be a positive value for Node 1 and a negative value for Node 2.

Also, either node may establish synchronization with the other node, or both nodes may establish synchronization.

Note that the notification of information related to such communication may be triggered by the gNB (for example, the received power of the gNB is equal, nodes are close to each other, etc.), or may be triggered by each node (for example, in advance may also probe for the presence of other nodes and request notification upon detection).

Also, after synchronization is established, each node may operate as follows.

　　· Execute all or part of the connection destination node and initial access.

　Initial access, for example, may be interpreted as sending and receiving messages according to the random access (RA) procedure. A node performing an initial access (connecting node) may transmit a PRACH or a PRACH-like channel or signal.

In addition, the connection destination node may notify information regarding transmission timing and/or reception timing of the wireless link, identification information of the own node (for example, network identifier), and the like.

The connecting node may establish a connection in the RRC layer with the destination node or a higher node than the destination node.

Also, the connection node may notify the connection destination node of its own node information (eg, identification information, node type, etc.). The connection destination node may add the identification information of the connection node to the list of nodes connected to the own node.

Also, the connecting node may start monitoring specific resources (for example, control signals) transmitted by the connecting node. The monitored information may be notified to the destination node and/or other nodes, for example, together with a signal regarding synchronization.

(3.3) Operation example 2
In this operation example, the transmission timing of the radio signal (which may be a radio link or channel; the same shall apply hereinafter) may be operated as follows.

Specifically, transmission timings for upper nodes (e.g., gNB (or gNB-based nodes) and lower nodes (e.g., nodes that are not gNBs or gNB-based nodes, UEs, etc.) are determined according to one of the following: good.

FIG. 9 shows an example of radio signal transmission timing (option 1) according to operation example 2. FIG. FIG. 10 shows an example (option 2) of transmission timings of radio signals according to operation example 2. FIG. FIG. 11 shows an example (option 3) of transmission timing of radio signals according to operation example 2. FIG.

As shown in FIG. 9, in (Option 1), all nodes match the transmission timing (the method of matching may be the same as for the synchronization signal). On the other hand, for reception, each node may have different transmission timings (timings may correspond to propagation delay differences between nodes).

As shown in FIG. 10, in (option 2), contrary to option 1, the transmission may differ for each node according to the reception timing. In this case, the information about the transmission timing may be notified from the upper node or the lower node.

On the other hand, for reception, the reception timing of all nodes may be matched, or the reception timing may be matched individually for each node. When the reception timing is adjusted individually for each node, the reception timings of all wireless links may be matched within the node. Alternatively, the reception timing may be changed for each wireless link.

As shown in FIG. 11, in (option 3), for transmission, the node on the transmitting side may determine the timing (for example, the reception timing of the synchronization signal). On the other hand, for reception, each node may have different transmission timings (timings may correspond to propagation delay differences between nodes).

Alternatively, as option 4, the timing of transmission and reception may be asynchronous without any coordination or control. In other words, timing synchronization may be corrected for each communication without synchronizing the system and nodes.

Also, different options may be selected from the options described above according to the function/role of the connecting node and/or the own node, connection method/signal/channel type, and the like.

In addition, depending on the timing of transmission and reception within a node, resource collisions between transmission and reception signals may occur. may be notified and exchanged.

(4) Functions and Effects According to the above-described embodiment, the following functions and effects are obtained. Specifically, the radio communication node (the node corresponding to the gNB, NW node 100 or UE 200) sets at least one of the plurality of synchronization signals based on the function or connection state of the radio communication node. good.

Also, the wireless communication nodes may assume that all wireless communication nodes in the wireless communication system 10 match (match) their transmission or reception timings.

According to such a wireless communication node, in a flexible network, a mesh network, etc., various wireless communication nodes with different functions are provided even when flexible network function arrangement is assumed in combination with various network topologies. can quickly and reliably establish synchronization with

Also, the wireless communication node may make the transmission timing of the synchronization signal different from the transmission timing of the synchronization signal in other wireless communication nodes. As a result, collision of synchronization signals between nodes can be avoided, and synchronization between wireless communication nodes can be established more reliably.

The wireless communication node may set at least one of the plurality of synchronization signals based on the received synchronization signal information, and determine the transmission timing of the synchronization signal from its own node. Therefore, synchronization between wireless communication nodes can be established more reliably by a rational method in which a plurality of wireless communication nodes cooperate.

(5) Other Embodiments Although the embodiments have been described above, it is obvious to those skilled in the art that the present invention is not limited to the description of the embodiments, and that various modifications and improvements are possible.

For example, although the term "wireless communication node (NW node)" is used in the above-described embodiments, it may be replaced with other similar terms such as network device, as described above.

Although the terms of downlink (DL) and uplink (UL) were used in the above-described embodiment, they may be called by other terms. For example, terms such as forward ring, reverse link, access link, and backhaul may be interchanged or associated. Alternatively, terms such as first link, second link, first direction, second direction, etc. may simply be used.

Also, in the above description, configure, activate, update, indicate, enable, specify, and select may be read interchangeably. good. Similarly, link, associate, correspond, and map may be read interchangeably to allocate, assign, monitor. , map, may also be read interchangeably.

Furthermore, specific, dedicated, UE-specific, and UE-specific may be read interchangeably. Similarly, common, shared, group-common, UE common, and UE shared may be read interchangeably.

Also, the block configuration diagram (FIG. 2) used to describe the above-described embodiment shows blocks for each function. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

Furthermore, the NW node 100 and the UE 200 (applicable device) described above may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 12 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 12, the device may be configured as a computing device including 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.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.

Each functional block of the device (see FIG. 2) is realized by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .

A processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.

Also, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. Further, the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store programs (program code), software modules, etc. capable of executing a method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like. Storage 1003 may also be referred to as an auxiliary storage device. The recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD). may consist of

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside. The output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

In addition, the device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc. A part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

In addition, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may include physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof, and RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)) , IEEE 802.16 (WiMAX®), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth®, other suitable systems, and/or next-generation systems enhanced therefrom. may be applied to Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

A specific operation that is performed by a base station in the present disclosure may be performed by its upper node in some cases. In a network consisting of one or more network nodes with a base station, various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc., but not limited to). Although the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals (information, etc.) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.

The determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of

The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indexed.

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various designations assigned to these various channels and information elements are in no way restrictive designations. is not.

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " Terms such as "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.

The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.

In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal" may be used interchangeably. .

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.

Also, the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same). For example, communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the mobile station may have the functions that the base station has. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels (or sidelinks).

Similarly, mobile stations in the present disclosure may be read as base stations. In this case, the base station may have the functions that the mobile station has.
A radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.

A slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a unit of time based on numerology.

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

If one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.

In addition, long TTI (for example, normal TTI, subframe, etc.) may be read as TTI having a time length exceeding 1 ms, and short TTI (for example, shortened TTI, etc.) is less than the TTI length of long TTI and 1 ms. A TTI having a TTI length greater than or equal to this value may be read as a replacement.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of neurology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on neumerology.

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.

In addition, a resource block may be composed of one or more resource elements (Resource Element: RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A Bandwidth Part (BWP) (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be configured in one carrier for a UE.

At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.

The terms "connected," "coupled," or any variation thereof mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being "connected" or "coupled." Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in this disclosure, two elements are defined using at least one of one or more wires, cables and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions, and the like.

The reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.

The term "based on" as used in this disclosure does not mean "based only on" unless otherwise specified. In other words, the phrase "based on" means both "based only on" and "based at least on."

"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.

Any reference to elements using the "first," "second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.

Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

In this disclosure, if articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

The terms "determining" and "determining" used in this disclosure may encompass a wide variety of actions. "Judgement" and "determination" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "determination" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment" or "decision" has been made. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean that "A and B are different from C". Terms such as "separate," "coupled," etc. may also be interpreted in the same manner as "different."

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

10 Wireless Communication System 40 Aircraft 50 Drone 60 Vehicle 100 NW Node 110 Radio Signal Transceiver 120 Amplifier 130 Modem 140 Control Signal/Reference Signal Processor 150 Coding/Decoding 160 Data Transceiver 170 Control 200 UE
1001 Processor 1002 Memory 1003 Storage 1004 Communication Device 1005 Input Device 1006 Output Device 1007 Bus

Claims (6)

1. a transmission unit that transmits a plurality of synchronization signals having different configurations;
   A wireless communication node, comprising: a control unit that sets at least one of the plurality of synchronization signals based on the function or connection state of the wireless communication node.
2. The wireless communication node according to claim 1, wherein the control unit makes the transmission timing of the synchronization signal different from the transmission timing of the synchronization signal in other wireless communication nodes.
3. A receiving unit for receiving synchronization signal information related to the synchronization signal,
   2. The wireless communication node according to claim 1, wherein the control unit sets at least one of the plurality of synchronization signals based on the synchronization signal information, and determines transmission timing of the synchronization signal.
4. a transmitting/receiving unit for transmitting/receiving radio signals;
   A control unit that sets transmission timing and reception timing of the radio signal,
   A radio communication node in which the control unit assumes that reception timings of all the radio signals in the radio communication node match, and sets the transmission timing according to the reception timings.
5. transmitting a plurality of synchronization signals having different configurations;
   setting at least one of the plurality of synchronization signals based on the function or connection state of a wireless communication node.
6. transmitting and receiving radio signals;
   setting the transmission timing and reception timing of the radio signal;
   The wireless communication method, wherein, in the setting step, the transmission timing is set according to the reception timing on the assumption that the reception timings of all the wireless signals in wireless communication nodes are the same.

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