WO2016209022A1 - Method for transmitting alarm message in v2x communication, and apparatus for same - Google Patents

Abstract

Disclosed is a method for transmitting and receiving an alarm in V2X communication in order to prevent waste of electric power and wireless resources. The method for transmitting and receiving an alarm of the present application transmits an alarm message by using a resource associated with the geographical location of an event, thereby enabling a receiving end to determine whether to receive the message.

Description

Alarm message transmission method in V2X communication and device therefor

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an alarm message in a V2X communication including a vehicle-to-vehicle (V2V).

With the development of Intelligent Transportation Systems (ITS), various information such as real-time traffic information and / or safety warnings are being studied for the exchange of vehicles between vehicles. For example, vehicle communications for Proximity Service (ProSe) and Public Warning System are being studied. The communication interface to the vehicle may be collectively referred to as Vehicle-to-X (V2X). V2X communication may be classified into vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure entity (V2I) communication. V2V communication may refer to communication between a vehicle and a vehicle. V2P may refer to communication between a vehicle and a device possessed by an individual (eg, a handheld terminal of a pedestrian or cyclist). In addition, V2I communication may refer to communication between a vehicle and a roadside unit (RSU). An RSU may refer to a traffic infrastructure entity. For example, the RSU may be an entity that sends a speed announcement. The vehicle, RSU, and handheld device may have a transceiver for V2X communication.

As described above, V2X communication may be used to notify a warning about various events such as safety. For example, information about an event that occurred in a vehicle or a road may be known to other vehicles or pedestrians through V2X communication. For example, information about a traffic accident, a change in road conditions, or a warning about an accident's risk may be communicated to other vehicles or pedestrians. For example, pedestrians adjacent to or crossing the road may be informed of the vehicle's access. For example, information about such an event may be broadcast by a vehicle, pedestrian, or RSU to surrounding vehicles, pedestrians, or RSUs. However, other vehicles or pedestrians approaching the place where the event occurred may not be able to obtain the broadcasted information. Thus, information about the event may be broadcast repeatedly. However, in this case, not only the resource overhead due to repetitive broadcasting is increased, but also the power consumption can be increased. In addition, since the receiving end may not know when broadcasting will occur, the communication device of the vehicle or the pedestrian may be kept in a wake-up state. In this case, the power consumption of the receiving end may be increased. Accordingly, there is a need for a V2X communication method capable of ensuring reception of information on an event and at the same time reducing power consumption.

The present invention was devised to solve the above-mentioned problems, and it is intended to provide a method of increasing power reception while increasing the possibility of receiving information on an event through V2X communication. In particular, the present invention provides a method for notifying other devices of the occurrence of an event by using an alarm message in addition to a message including actual information on the event.

An object of the present invention is to provide a method and apparatus for transmitting an alarm message in V2X communication.

In one embodiment for achieving the above technical problem, an alarm transmission method for an event of a terminal in a wireless communication system, information on the mapping relationship between a plurality of regions and a plurality of transmission resource regions Receiving; Obtaining location information; And in response to the occurrence of an event, transmitting an alarm message indicating the occurrence of the event, wherein the alarm message is transmitted using a transmission resource region determined based on the information on the mapping relationship and the location information. Can be.

In addition, as another embodiment for achieving the above technical problem, an alarm reception method for an event of a terminal in a wireless communication system, for a mapping relationship between a plurality of regions and a plurality of transmission resource regions. Receiving information; Obtaining location information; And receiving an alarm message indicating an occurrence of an event, wherein the alarm message may be received using a transmission resource region determined based on the information on the mapping relationship and the location information.

According to embodiments of the present invention, it is possible to provide a method and apparatus for transmitting an alarm message more efficiently in V2X communication.

In addition, according to embodiments of the present invention, it is possible to provide a method and apparatus for transmitting an alarm message that can reduce power consumption while ensuring reception of an alarm message.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide an embodiment of the present invention and together with the description, illustrate the technical idea of the present invention.

1 illustrates a system structure of an LTE system that is an example of a wireless communication system.

2 shows a control plane of a wireless protocol.

3 shows a user plane of a wireless protocol.

4 is a diagram illustrating a structure of a type 1 radio frame.

5 is a diagram illustrating a structure of a type 2 radio frame.

6 is a diagram illustrating a resource grid in a downlink slot.

7 illustrates a structure of a downlink subframe.

8 is a diagram illustrating a structure of an uplink subframe.

9 shows a simplified D2D communication network.

10 shows a simplified V2X communication network.

11 illustrates a radio resource according to an example.

12A illustrates mapping of radio resources and regions according to an example.

12B illustrates mapping of radio resources and regions according to another example.

12C illustrates mapping of radio resources and regions according to another example.

13 is a flowchart of a method of transmitting an alarm message, according to an exemplary embodiment.

14 is a schematic diagram of devices according to an embodiment of the present invention.

The following embodiments combine the components and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, some components and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.

In the present specification, embodiments of the present invention will be described based on the relationship between data transmission and reception between vehicles. In the following description, the vehicle may mean, for example, a vehicle including a terminal, and may be referred to as a terminal. In the following description, a road side unit (RSU) may mean an infrastructure connectable to a base station, a relay, or a network. Here, the base station has a meaning as a terminal node of the network that directly communicates with the terminal. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases. In addition, in the following description, a pedestrian includes a pedestrian moving on a bicycle and may mean a pedestrian carrying a terminal.

That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. A 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like. The repeater may be replaced by terms such as relay node (RN) and relay station (RS). In addition, the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.

Specific terms used in the following description are provided to help the understanding of the present invention, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present invention.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.

The following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used in various radio access systems. CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. LTE-A (Advanced) is the evolution of 3GPP LTE. WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on 3GPP LTE and 3GPP LTE-A systems, but the technical spirit of the present invention is not limited thereto.

LTE  System structure

A system structure of an LTE system, which is an example of a wireless communication system to which the present invention can be applied, will be described with reference to FIG. 1. The LTE system is a mobile communication system evolved from the UMTS system. As shown in FIG. 1, the LTE system structure can be broadly classified into an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC). The E-UTRAN is composed of a UE (User Equipment, UE) and an eNB (Evolved NodeB, eNB), and is called a Uu interface between the UE and the eNB, and an X2 interface between the eNB and the eNB. The EPC consists of a Mobility Management Entity (MME) that handles the control plane and a Serving Gateway (S-GW) that handles the user plane. The S1-MME interface is used between the eNB and the MME. The eNB and the S-GW are called S1-U interfaces, and they are collectively called S1 interfaces.

The radio interface protocol (Radio Interface Protocol) is defined in the Uu interface, which is a radio section, and consists of a physical layer, a data link layer, and a network layer horizontally. Is divided into a user plane for user data transmission and a control plane for signaling (control signal) transmission. This air interface protocol is based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems. Layer 1), Layer 2 (L2) including Medium Access Control (MAC) / Radio Link Control (RLC) / Packet Data Convergence Protocol (PDCP) layer, and Layer 3 (L3) including Radio Resource Control (RRC) layer. Third layer). They exist in pairs at the UE and the E-UTRAN, and are responsible for data transmission of the Uu interface.

Description of each layer of the wireless protocol shown in FIG. 2 and FIG. 3 is as follows. 2 is a diagram illustrating a control plane of a radio protocol, and FIG. 3 is a diagram illustrating a user plane of a radio protocol.

A physical layer (PHY) layer, which is a first layer, provides an information transfer service to a higher layer by using a physical channel. The PHY layer is connected to the upper Medium Access Control (MAC) layer through a transport channel, and data between the MAC layer and the PHY layer moves through this transport channel. At this time, the transport channel is largely divided into a dedicated transport channel and a common transport channel according to whether the channel is shared. Then, data is transferred between different PHY layers, that is, between PHY layers of a transmitting side and a receiving side through a physical channel using radio resources.

There are several layers in the second layer. First, the media access control (MAC) layer serves to map various logical channels to various transport channels, and also plays a role of logical channel multiplexing to map multiple logical channels to one transport channel. . The MAC layer is connected to a Radio Link Control (RLC) layer, which is a higher layer, by a logical channel, and the logical channel is a control channel that transmits information on the control plane according to the type of information to be transmitted. It is divided into (Control Channel) and Traffic Channel that transmits user plane information.

The RLC layer of the second layer performs segmentation and concatenation of data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in a wireless section. In addition, in order to guarantee various QoS required by each radio bearer (RB), TM (Transparent Mode), UM (Un-acknowledged Mode), and AM (Acknowledged Mode, Response mode). In particular, the AM RLC performs a retransmission function through an Automatic Repeat and Request (ARQ) function for reliable data transmission.

The Packet Data Convergence Protocol (PDCP) layer of the second layer is an IP containing relatively large and unnecessary control information for efficient transmission in a low bandwidth wireless section when transmitting IP packets such as IPv4 or IPv6. Performs Header Compression which reduces the packet header size. This transmits only the necessary information in the header portion of the data, thereby increasing the transmission efficiency of the radio section. In addition, in the LTE system, the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent third-party data interception and integrity protection (Integrity protection) to prevent third-party data manipulation.

The radio resource control (RRC) layer located at the top of the third layer is defined only in the control plane, and the configuration, re-configuration, and release of radio bearers (RBs) are performed. It is responsible for controlling logical channels, transport channels and physical channels. Here, the radio bearer (RB) refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the terminal and the UTRAN, and in general, the establishment of the RB means a radio protocol required to provide a specific service. The process of defining the characteristics of the layer and the channel and setting each specific parameter and operation method. RB is divided into SRB (Signaling RB) and DRB (Data RB). SRB is used as a channel for transmitting RRC messages in the control plane, and DRB is used as a channel for transmitting user data in the user plane.

LTE Of LTE -A resource structure / channel

A structure of a downlink radio frame will be described with reference to FIGS. 4 and 5.

In a cellular OFDM wireless packet communication system, uplink / downlink data packet transmission is performed in subframe units, and one subframe is defined as a predetermined time interval including a plurality of OFDM symbols. The 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).

4 is a diagram illustrating a structure of a type 1 radio frame. The downlink radio frame consists of 10 subframes, and one subframe consists of two slots in the time domain. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). For example, one subframe may have a length of 1 ms and one slot may have a length of 0.5 ms. One slot includes a plurality of OFDM symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain. In the 3GPP LTE system, since OFDMA is used in downlink, an OFDM symbol represents one symbol period. An OFDM symbol may also be referred to as an SC-FDMA symbol or symbol period. The resource block (RB) is a resource allocation unit and may include a plurality of consecutive subcarriers in one slot.

5 is a diagram illustrating a structure of a type 2 radio frame. Type 2 radio frames consist of two half frames, each of which has five subframes, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). One subframe consists of two slots. DwPTS is used for initial cell search, synchronization or channel estimation at the terminal. UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal. The guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink. On the other hand, one subframe consists of two slots regardless of the radio frame type.

The structure of the radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of symbols included in the slot may be variously changed.

6 is a diagram illustrating a resource grid in a downlink slot. One downlink slot includes seven OFDM symbols in the time domain, and one resource block (RB) is shown to include twelve subcarriers in the frequency domain, but the present invention is not limited thereto. For example, one slot includes seven OFDM symbols in the case of a general cyclic prefix (CP), but one slot may include six OFDM symbols in the case of an extended-CP (CP). Each element on the resource grid is called a resource element. One resource block includes 12x7 resource elements. The number of NDLs of resource blocks included in a downlink slot depends on a downlink transmission bandwidth. The structure of the uplink slot may be the same as the structure of the downlink slot.

7 illustrates a structure of a downlink subframe. Up to three OFDM symbols in front of the first slot in one subframe correspond to a control region to which a control channel is allocated. The remaining OFDM symbols correspond to data regions to which a physical downlink shared channel (PDSCH) is allocated. The downlink control channels used in the 3GPP LTE system include, for example, a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), and a physical HARQ indicator channel. (PHICH: Physical Hybrid automatic repeat request Indicator CHannel). The PCFICH is transmitted in the first OFDM symbol of a subframe and includes information on the number of OFDM symbols used for control channel transmission in the subframe. The PHICH includes a HARQ Acknowledgment (ACK) / NACK (Negative ACK) signal as a response to uplink transmission. Control information transmitted through the PDCCH is referred to as downlink control information (DCI). DCI includes uplink or downlink scheduling information or an uplink transmit power control command for a certain terminal group. The PDCCH includes a resource allocation and transmission format of a DL shared channel (DL-SCH), resource allocation information of an uplink shared channel (UL-SCH), paging information of a paging channel (PCH), system information on a DL-SCH, and PD- Resource allocation of upper layer control messages, such as random access responses transmitted on the SCH, sets of transmit power control commands for individual terminals in any terminal group, transmit power control information, Voice over IP (VoIP) Activation may be included. A plurality of PDCCHs may be transmitted in the control region. The terminal may monitor the plurality of PDCCHs. The PDCCH is transmitted in an aggregation of one or more consecutive control channel elements (CCEs). CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on the state of a radio channel. The CCE corresponds to a plurality of resource element groups. The PDCCH format and the number of available bits are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs. The base station determines the PDCCH format according to the DCI transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information. The CRC is masked with an identifier called Radio Network Temporary Identifier (RNTI) according to the owner or purpose of the PDCCH. If the PDCCH is for a specific terminal, the cell-RNTI (C-RNTI) identifier of the terminal may be masked to the CRC. Or, if the PDCCH is for a paging message, a paging indicator identifier, eg, Paging-RNTI (P-RNTI), may be masked in the CRC. If the PDCCH is for system information (more specifically, System Information Block (SIB)), the system information identifier and system information RNTI (SI-RNTI) may be masked to the CRC. Random Access-RNTI (RA-RNTI) may be masked to the CRC to indicate a random access response that is a response to transmission of a random access preamble of the terminal.

8 is a diagram illustrating a structure of an uplink subframe. The uplink subframe may be divided into a control region and a data region in the frequency domain. A physical uplink control channel (PUCCH) including uplink control information is allocated to the control region. A physical uplink shared channel (PUSCH) including user data is allocated to the data area. In order to maintain a single carrier characteristic, one UE does not simultaneously transmit a PUCCH and a PUSCH. PUCCH for one UE is allocated to an RB pair in a subframe. Resource blocks belonging to a resource block pair occupy different subcarriers for two slots. This is called a resource block pair allocated to the PUCCH is frequency-hopped at the slot boundary. For example, in a D2D communication system, terminals may transmit and receive data to each other using an uplink data resource or a data resource corresponding thereto.

Hereinafter, various embodiments in which a terminal performs device to device communication (hereinafter, may be referred to as D2D communication or D2D direct communication) will be described. Although 3GPP LTE / LTE-A is described as an example for description, D2D communication may be applied to and used in other communication systems (IEEE 802.16, WiMAX, etc.).

D2D  Communication type

The D2D communication may be classified into a network coordinated D2D communication type and an autonomous D2D communication type according to whether D2D communication is performed through control of a network. The network cooperative D2D communication type may be further classified into a type in which only D2D transmits data (data only in D2D) and a type in which a network performs connection control only (Connection control only in network) according to the degree of network involvement. For convenience of explanation, hereinafter, a type in which only D2D transmits data will be referred to as a 'network-intensive D2D communication type', and a type in which a network performs only connection control will be referred to as a 'distributed D2D communication type'.

In the network centralized D2D communication type, only data is exchanged between D2D terminals, and connection control and radio resource allocation between the D2D terminals are performed by a network. D2D terminals may transmit and receive data or specific control information by using a radio resource allocated by a network. For example, HARQ ACK / NACK feedback or channel state information (CSI) for data reception between D2D terminals may be transmitted to other D2D terminals through a network rather than directly exchanged between the D2D terminals. Specifically, when the network establishes a D2D link between the D2D terminals and allocates radio resources to the established D2D link, the transmitting D2D terminal and the receiving D2D terminal may perform D2D communication using the allocated radio resources. That is, in the network centralized D2D communication type, D2D communication between D2D terminals is controlled by a network, and the D2D terminals may perform D2D communication using radio resources allocated by the network.

The network in the distributed D2D communication type plays a more limited role than the network in the network centralized D2D communication type. In the distributed D2D communication type, the network performs access control between the D2D terminals, but the radio resource allocation (grant message) between the D2D terminals may be occupied by the D2D terminals by themselves without competition. For example, HARQ ACK / NACK feedback or channel state information for data reception between D2D terminals for data reception between D2D terminals may be directly exchanged between D2D terminals without passing through a network.

As in the above-described example, D2D communication may be classified into a network-intensive D2D communication type and a distributed D2D communication type according to the degree of D2D communication intervention of the network. At this time, a common feature of the network-centralized D2D communication type and the distributed D2D communication type is that D2D access control can be performed by a network.

Specifically, a network in a network cooperative D2D communication type may establish a connection between D2D terminals by establishing a D2D link between D2D terminals to perform D2D communication. In setting the D2D link between the D2D terminals, the network may assign a physical D2D link identifier (LID) to the configured D2D link. The physical D2D link ID may be used as an identifier for identifying each of a plurality of D2D links between the plurality of D2D terminals.

In the autonomous D2D communication type, unlike the network centralized and distributed D2D communication types, D2D terminals can freely perform D2D communication without the help of a network. That is, in the autonomous D2D communication type, the D2D UE performs access control and occupation of radio resources by itself, unlike in the network-intensive and distributed D2D communication. If necessary, the network may provide the D2D user equipment with D2D channel information that can be used in the corresponding cell.

D2D  Setting up a communication link

For convenience of description herein, a terminal capable of performing or performing D2D communication, which is direct communication between terminals, will be referred to as a D2D terminal. In addition, in the following description, "UE" may refer to a D2D terminal. When it is necessary to distinguish between a transmitting end and a receiving end, a D2D terminal that transmits or intends to transmit data to another D2D terminal using a radio resource assigned to a D2D link during D2D communication is called a transmitting D2D terminal (D2D TX UE), A terminal that receives or intends to receive data from a transmitting D2D terminal will be referred to as a receiving D2D terminal (D2D RX UE). When there are a plurality of receiving D2D terminals to receive or intend to receive data from the transmitting D2D terminal, the plurality of receiving D2D terminals may be distinguished through a first to N prefix. Furthermore, for convenience of explanation, hereinafter, arbitrary nodes of the network end such as a base station, a D2D server, and an access / session management server for access control between D2D terminals or allocating radio resources to the D2D link will be referred to as 'networks'. Let's do it.

In order to transmit data to other D2D devices via D2D communication, the D2D device needs to check the existence of D2D devices located in the periphery where data can be transmitted and received, and for this purpose, D2D peer discovery (D2D peer discovery). ). The D2D UE performs D2D discovery within a discovery interval, and all D2D UEs may share the discovery interval. The D2D UE may receive D2D discovery signals transmitted by other D2D UEs by monitoring logical channels of the discovery area within the discovery period. The D2D terminals receiving the transmission signal of another D2D terminal prepare a list of adjacent D2D terminals using the received signal. In addition, it broadcasts its own information (ie, identifier) within the search interval, and other D2D UEs can receive the broadcast D2D discovery signal to know that the D2D UE exists within a range capable of performing D2D communication. .

Information broadcasting for D2D discovery may be performed periodically. In addition, such broadcast timing may be predetermined by the protocol and known to the D2D terminals. In addition, the D2D UE may transmit / broadcast a signal during a portion of the discovery period, and each D2D UE may monitor signals that are potentially transmitted by other D2D UEs in the remainder of the D2D discovery period.

For example, the D2D discovery signal may be a beacon signal. In addition, the D2D search periods may include a plurality of symbols (eg, OFDM symbols). The D2D UE may transmit / broadcast the D2D discovery signal by selecting at least one symbol within the D2D discovery period. In addition, the D2D user equipment may transmit a signal corresponding to one tone in a symbol selected by the D2D user equipment.

After the D2D UEs discover each other through a D2D discovery process, the D2D UEs may perform a connection establishment process and transmit traffic to another D2D UE.

9 shows a simplified D2D communication network.

In FIG. 9, D2D communication between UEs UE1 and UE2 supporting D2D communication is performed. In general, a user equipment (UE) refers to a terminal of a user, but when a network equipment such as an evolved Node B (eNB) transmits and receives a signal according to a communication scheme between the terminals (UE 1 and UE 2), the eNB may also be a kind of user equipment. May be considered a UE.

UE1 may operate to select a resource unit corresponding to a specific resource in a resource pool, which means a set of resources, and transmit a D2D signal using the resource unit. UE2, which is a reception terminal, may configure a resource pool through which UE1 can transmit a signal, and detect a signal of UE1 in the corresponding pool. For example, when UE1 is in the connection range of the base station, the resource pool may inform the base station. Also, for example, when UE1 is outside the connection range of the base station, another terminal may inform UE1 of the resource pool or UE1 may determine the resource pool based on the predetermined resource. In general, a resource pool is composed of a plurality of resource units, and each terminal may select one or a plurality of resource units and use it for transmitting its own D2D signal.

In the above-described D2D communication, the term D2D may be replaced with sidelinks.

10 shows a simplified V2X communication network.

V2X communication may be classified into vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure entity (V2I) communication. V2V communication may refer to communication between the vehicle 1001 and the vehicle 1002. Traffic information and the like may be shared between the vehicle 1001 and the vehicle 1002 through V2V communication. V2P may refer to communication between the vehicle 1001 and a device carried by the pedestrian 1003 (eg, a handheld terminal of a pedestrian or bicyclist). Since the pedestrian 1003 may also move along sidewalks adjacent to the road, information on dangers on the road may be shared through V2P communication. In addition, V2I communication may refer to communication between the vehicle 1001 and a roadside unit (RSU) 1004. The RSU 1004 may refer to a traffic infrastructure entity. For example, RSU 1004 may be an entity that sends a speed notification. The handheld devices of the vehicles 1001, 1002, the RSU 1004, and the pedestrian 1003 may be equipped with a transceiver for V2X communication. V2X communication may be implemented using a technology similar to device-to-device (D2D) communication of the communication standard of the 3rd generation partnership project (3GPP). In addition, V2X communication may be implemented using a dedicated short-range communications (DSRC) technology of the Institute of Electrical and Electronics Engineers (IEEE).

Hereinafter, a method of transmitting an alarm message through V2X communication according to an embodiment of the present application will be described. In the following description, the following description will focus on V2V communication, but the following embodiments may be applied to V2I and / or V2P communication. In addition, the following embodiments are described based on the communication standards of 3GPP, but may also be implemented by techniques corresponding to the communication standards of IEEE. In addition, in the following description, the terms transmission and broadcasting may be interchanged. In addition, in the following description, a vehicle or a pedestrian may mean a vehicle or a pedestrian carrying user equipment. In the following description, a vehicle or a pedestrian may be used as a term meaning the terminal itself.

As described above, for the purpose of warning or safety, an alarm message via V2X communication may be transmitted. For example, information about a situation where a vehicle and a pedestrian are expected to collide, a failure or an accident of the vehicle may be alerted to the pedestrian as an event. For example, a vehicle may broadcast its location periodically. Adjacent pedestrians may determine the risk by receiving the location of the vehicle. However, as described above, there is a need for a method capable of reducing power consumption while increasing the reception probability of a vehicle or a terminal.

Hereinafter, in order to solve the above-described problem, a method of transmitting an alarm message for a specific event will be described. In the following description, an alarm message may mean a message or a specific signal for an alarm for warning a specific event. Hereinafter, the message or the specific signal for the alarm may be referred to as an alarm message. In the following description, a vehicle or a pedestrian may broadcast information about an event that has occurred. In addition, the vehicle, the road side unit (RSU), or the base station that has recognized the event may broadcast information about the event. In the following description, a device that broadcasts information on an event may be referred to as a broadcasting unit (BU). Thus, the broadcasting unit may be a vehicle, pedestrian, RSU or base station. For example, when the broadcasting unit is an RSU or a base station, information on an event may be broadcast using downlink resources. In addition, for example, when the broadcasting unit is a vehicle and / or a pedestrian, information on the event may be broadcast using uplink resources.

For example, the vehicle may send an alarm message to inform pedestrians of a dangerous situation. In this case, the pedestrian may respond to a dangerous situation by receiving an alarm message and receiving a message about an actual event that is subsequently transmitted. Thus, the alarm message may be an indicator indicating the transmission of a message for a later event. For example, the pedestrian may be aware of information about when to send an alarm message. In this case, the pedestrian (that is, the terminal of the pedestrian) transitions to the wake-up mode at the time when the alarm message is transmitted, attempts to receive the alarm message, and if it is determined that no valid alarm message is received, It may transition to sleep mode. The pedestrian can prevent power consumption by using the information at the time of transmission of the alarm message. In addition, the alarm message may be transmitted before the message about the actual event is transmitted, and may be transmitted in a form that can be easily decoded. Therefore, the pedestrian can decode the alarm message and recognize that an event has occurred. For example, the pedestrian may have successfully received the alarm message but could not receive or decode the message for the actual event. In this case, the pedestrian may request the base station or a nearby RSU to send a message about the actual event. In order to propagate a message about an event, the vehicle in which the event occurred may transmit information about the event to a base station or a neighboring RSU. In this case, the vehicle may transmit information about the event, along with its location information.

For example, an event may have occurred in a plurality of vehicles. Each vehicle may also transmit alarm messages using different types of signals. In this case, different resources may be allocated to each vehicle in order to transmit an alarm message of each vehicle. When an event occurs in a plurality of vehicles, too many radio resources may be allocated to the vehicles. In addition, the pedestrian may have to attempt to receive too many alarm messages.

Accordingly, in order to solve the above problem, a series of vehicles may transmit an alarm message using the same signal using the same resource. As described above, the alarm message can be received at the transmission timing of the alarm message, and the occurrence of the event can be recognized. You can then receive a message about the actual event. In this case, resources to which a message about an actual event is transmitted may be configured differently from vehicle to vehicle.

As discussed above, if an alarm message is not received on a given resource, the pedestrian may wait in sleep mode until the next alarm message is sent. In addition, as described above, after the pedestrian reads the alarm message, the pedestrian may request a message for the actual event from the base station or the RSU. In this case, when the pedestrian requests a message about an actual event, the pedestrian may transmit his location together. In addition, as described above, the vehicle in which the event occurs may transmit information about the event to a base station or an RSU around the vehicle, and the vehicle may transmit its location information together with the information about the event.

In the above-described embodiments, the alarm message may be configured to determine whether the receiving end (eg, a pedestrian) is valid for the receiving end as the alarm message itself. For example, the location of the vehicle transmitting the alarm message may be a criterion for validity determination. For example, an alarm message transmitted by a pedestrian and a vehicle having a predetermined distance or more may be determined to be invalid for the pedestrian. For example, the receiving end may determine whether to receive a message for the actual event based on its location and the location of the event corresponding to the alarm message.

For example, an event may occur in many vehicles far away from pedestrians. In this case, the vehicles may all transmit the same signal using the same resource, and thus a signal having a high power may be formed. Accordingly, a pedestrian far from where an event occurs may receive a signal and may mistake it for an event occurring in an adjacent location based on the received power. Therefore, alarm messages using different resources may be transmitted according to locations. That is, resources for transmitting an alarm message may be set according to the occurrence position of the event. For example, regions may be distinguished by using alarm messages using different sequences and / or signals according to regions. For example, a sequence for distinguishing regions may be generated using codewords. In addition, the sequence for identifying the region may mean information about the region of the alarm message. For example, the sequence may be in the form of a reference signal. For example, a DeModulation Reference Signal (DMRS) may be used as a sequence for identifying regions.

11 illustrates a radio resource according to an example.

As shown in FIG. 11, a radio resource may be divided into a plurality of resource regions on a frequency and / or time axis. For example, there may be a mapping relationship in the resource region and region where the alarm message is sent. For example, different frequency and / or time resources may be mapped to different regions. For example, when an alarm message is transmitted in a specific region, an alarm message may be transmitted using resources mapped to the specific region. For example, when an event occurs in a specific region, the vehicle may transmit an alarm message using resources mapped to the specific region. For example, an event may occur in a vehicle at a location matching the resource R5. In this case, the vehicle may use the resource R5 to transmit an event message associated with the event. In addition, an event may occur in a plurality of vehicles in the region mapped to the resource R5. In this case, vehicles in the region matched with R5 may transmit the same signal using the same resource. In addition, as described above, events occurring in different regions may be transmitted on the same resource and may be classified by a sequence. Thus, there may be a mapping relationship between resources and / or sequences and locations (regions). The above-described mapping relationship may be determined based on Global Positioning System (GPS) information. For example, the vehicle may recognize its location based on the GPS information or the signal from the base station, and transmit an alarm message through a resource region corresponding to the location. In addition, the receiving pedestrian may also determine its location based on GPS information, signals from the base station or RSU. In addition, the location information of the vehicle and / or pedestrian may be determined from reference signals transmitted from the base station and / or the RSU. For example, the alarm message may be sent using a transmission resource corresponding to the location where the event occurred. In addition, the receiving end may determine whether to receive the message for the actual event based on the transmission resource of the alarm message, its location, and / or the mapping relationship between the resource and the region.

In addition, a transmission resource of an alarm message and / or data may be determined based on a measurement of a UE-type RSU (UE-type RSU). Information of the terminal type RSU may be delivered to a receiving vehicle or a pedestrian through a DMRS sequence or an RSU discovery message.

As illustrated in FIG. 11, when resources for transmitting an alarm message are allocated differently for each region, the actual region may be divided into large regions. Also, within a large area, a large area may be divided into small areas. For example, resources for the transmission of alarm messages in small areas may be divided into resources as shown in FIG. 11. For example, as shown in FIG. 12A, when divided into nine resource regions, nine resource regions may be allocated to one large region, and each of the resource regions may be allocated to a small region. For example, a large area may be one large area formed by tying up an area where N (N is a natural number) base stations cover together.

In the above-described embodiments, as shown in FIG. 12A, a large area or a small area may be divided according to latitude and / or longitude. Alternatively, a large area or a small area may be determined based on the base station. For example, a large area or a small area may be a reference signal received power range (RSRP) range or arrival time range such as Common Reference Signal (CRS) / Channel State Information-Reference Signal (CSI-RS) / Positioning Reference Signal (PRS). It may be classified based on an interval time range. In this case, the mapping relationship between the resource and the region may be set according to the coverage of the base station as shown in FIG. 12B.

When an alarm message is transmitted using a mapping relationship between a transmission resource and a region, at least a portion of each region may overlap each other. For example, the event may have occurred at or near the boundary of each region. In this case, even though the pedestrian at the boundary of the area is actually an event occurring close to him, since the separated areas are different, the pedestrian may decide not to receive an alarm message corresponding to the event. Therefore, by setting the regions so that some of the regions overlap each other, it is possible to allow pedestrians located at the boundary of the region to receive alarm messages of the adjacent regions. In addition, in receiving an alarm message, the receiving end (eg, a pedestrian) may receive not only an alarm message on a resource corresponding to an area to which it belongs, but also an alarm message on a resource corresponding to an area adjacent to the area to which it belongs. have.

As described above, when some of the regions overlap each other, an event may occur in the overlapped region. In this case, the event-encounter vehicle may transmit an alarm message using resources corresponding to all the regions overlapped with the region where the event occurred. In addition, overlapping divisions of regions may apply only to pedestrians. For example, overlapping regions and resource mappings may only be aware of pedestrians. In addition, the vehicle may be divided such that regions do not overlap each other. For example, as illustrated in FIG. 12C, the region a and the region b may be configured not to overlap each other, and the region c and the region d may be configured as regions overlapping each other. For example, region c may be configured to include all of region a and a portion of region b, and region d may be configured to include all of region b and a portion of region a. Also, region a and region c may be mapped to the same resource for transmission of an alarm message. In addition, zone b and zone d may be mapped to the same resource for transmission of an alarm message. For example, when an event occurs in region b, the transmitter (eg, a vehicle) may transmit an alarm message using a resource mapped to region b. In addition, the receiving end (eg, a vehicle or a pedestrian) receiving the alarm message may determine that the event has occurred in the area d, which is wider than the area b. Therefore, the overlapped region settings may be set differently for the vehicle and the pedestrian or differently for the transmitter and the receiver.

The above-described method of mapping an area and a resource may be applied to a plurality of base stations (or terminals or RSUs) broadcasting information of different areas. For example, the base station may inform the terminal (eg, a pedestrian or a vehicle) which resource a message generated in a particular region can be transmitted using. The base station may transmit information on the mapping relationship between regions and resources to the terminal. For example, the base station may transmit information on a mapping relationship between resources and regions through RRC (Radio Resource Control) signaling. However, the mapping relationship between resources and regions may be preset.

For example, the base station may transmit (alarm) messages generated in a plurality of regions to terminals in the coverage area of the base station using resources corresponding to each region. Also, each terminal attempts to receive a message only from a resource corresponding to a message generated in an area coming into a communication area based on its location, and stops receiving a message from a resource corresponding to the other area to reduce power consumption. It can also be reduced. Also, for example, the terminal may attempt to receive a message only from resources mapped to an area corresponding to its location and / or resources mapped to an area adjacent to an area corresponding to its location.

In addition, as described above, each base station may broadcast not only its own region but also information generated in the adjacent region using resources corresponding to the neighboring region. For example, a terminal of a vehicle moving at a high speed may move to an adjacent cell within a short time. Therefore, not only the alarm message transmitting cell of the vehicle but also the base station of the adjacent cell may also broadcast the alarm message.

As described above, regions may be classified based on coordinates such as latitude and / or longitude, but may be determined by regions covered by specific cells, as shown in FIG. 12B. When each region is divided based on the coverage of the cell, the base station may inform the UE which message generated in which cell is transmitted from which resource. In addition, each region may be determined based on signal measurements of base stations, such as RSRP. For example, a region may be determined based on whether the RSRP for a particular cell belongs to a certain region. Even when the terminal determines its own location and / or resources to which it will attempt to receive, the location and / or location of the terminal based on coordinates such as latitude and / or longitude, coverage of each cell, and / or measurements such as RSRP Receive resources of the terminal may be determined. For example, the receiving terminal may determine whether the terminal is adjacent to the center of the serving cell based on the RSRP. If the terminal is determined to be adjacent to the center of the serving cell, the terminal may receive only information generated in its serving cell. In addition, when the terminal is determined to be adjacent to the adjacent cell of the serving cell based on the RSRP, the terminal may receive both the message generated in the serving cell and the neighbor cell of the serving cell. For example, the terminal may determine whether to receive a message generated in the neighbor cell area based on its location, the location of the serving cell, and the location of the neighbor cell.

As described above, at the transmission timing of the alarm message, the terminal of the pedestrian may transition to the wake-up mode to receive and decode the alarm message. In addition, the terminal may recognize events in each region based on the alarm message. In this case, the receiving terminal may receive only an alarm message received from a resource mapped to an area and / or an adjacent area corresponding to its location. Accordingly, unnecessary false alarms can be prevented by not receiving an alarm message for an event occurring in a region other than the region (and / or neighboring region) to which it belongs. Also, for example, when the alarm message is transmitted in an area to which it does not belong, the terminal may transition to the sleep mode. If the alarm message is a message associated with a region associated with the terminal (region of the terminal or an adjacent region), the terminal may receive and decode a message about the actual event that is subsequently transmitted. In addition, the terminal may read the alarm message and request the base station or the RSU to transmit a message for the actual event. As described above, the vehicle in which the event occurs may transmit information about the event to a base station or an RSU around the vehicle, and the vehicle may transmit its location information together with the information about the event. For example, the vehicle may transmit the number of the region associated with its location or the number of resources mapped to the region. The number is exemplary, and the location information may be transmitted in the form of a bitmap indicating the area corresponding to the location of the vehicle.

In addition, the transmission resource of the alarm message may be determined based on the level of the alarm message. For example, an alarm message for pedestrians and an alarm message for vehicles may be assigned to different classes. In addition, an alarm message for a pedestrian and an alarm message for a vehicle may be transmitted using different resources. For example, referring to FIG. 11, resources R1, R2, and R3 may be allocated as resources to which an alarm message for essential information that a pedestrian must receive is transmitted. In addition, resources R4, R5, R6, R7, R8, and R9 may be allocated as resources to which a message about information (eg, optional information) that is not essential to pedestrians is transmitted. In this case, the vehicle transmitting the alarm message may transmit the alarm message using resources according to the class of the event that occurred to the vehicle. For example, when an event occurring in the vehicle is essential information for a pedestrian, the vehicle may transmit an alarm message for the event using one or more of resources R1, R2, and R3.

For example, the pedestrian may wake up at the timing of transmission of the alarm message, receive the alarm message, and recognize the occurrence of the event. In this case, in order to receive only essential information, the receiving pedestrian may attempt to receive only resources for which an alarm message for essential information is transmitted. For example, when an alarm message is received from a resource corresponding to the optional information, the terminal may transition to a sleep mode. In addition, when an alarm message is received from a resource corresponding to essential information, the terminal may receive a message about essential information transmitted subsequently. In addition, the terminal may request the base station or the RSU to transmit a message for the actual event after receiving the alarm message. In addition, the vehicle where the event occurs may transmit a message about the actual event to the base station or the neighboring RSU. In this case, the vehicle may simultaneously transmit its location information while transmitting a message about the event.

The rating for the event may be predetermined. In addition, the class of the event may be determined based on Radio Resource Control (RRC) signaling from the base station or RSU. In addition, the level of the message for the event may be determined differently depending on whether the receiving end is a vehicle or a pedestrian.

In addition, the alarm message may include information on the operation required by the message for the actual event. For example, the alarm message may be differentiated according to whether or not the receiving vehicle is to slow down. Also, for example, alarm messages may be classified according to whether a pedestrian should stop or avoid in another direction.

In the above embodiments, the alarm message is transmitted on the physical player, but the message in the alarm message may be linked to a layer higher than the physical layer. For example, the message in the alarm message may be defined in a layer above the application layer or the Radio Access Network (RAN) protocol. In this case, after receiving the alarm message at the receiving end, to determine whether to receive a message for the corresponding event, it must decode up to the upper layer. The receiving end may consume more power to decode the higher layer. Therefore, the upper layer may instruct the physical layer or the MAC (Medium Access Control) layer of the alarm message requiring the reception of the event message among the alarm messages.

For example, the alarm message may be defined to have a value of one of 00, 01, 10, or 11 on the physical layer or MAC layer. For example, 00 is associated with a message from the upper tier, “Dangerous vehicles exist in the alleys adjacent to the receiving pedestrians,” and 01 is associated with a message from the upper tier, “Dangerous vehicle exists in the crosswalks adjacent to the receiving pedestrians.” 10 may be associated with a message of a higher layer, "a faulty vehicle exists around the receiving pedestrian," and 11 may be associated with a "accident vehicle exists around the receiving pedestrian." In this case, depending on the situation of the receiving end, it may be determined whether to receive a message for the actual event. For example, a pedestrian receiving end may receive only messages about actual events about dangerous situations far away from pedestrian crossings. Thus, in the above example, the receiving end only needs to read the message "There is a dangerous vehicle in the alley adjacent to the receiving pedestrian" corresponding to "00". In this case, the upper layer may instruct to decode the alarm message to the upper layer only when the indicator on the physical layer or the MAC layer is "00". Accordingly, the filtering of the alarm message may be performed without decoding the actual message of the upper layer.

In the above embodiment, although the upper layer decoding of the alarm message is indicated by the higher layer, the RSU may indicate an alarm message requiring decoding at the receiving end. For example, when the RSU recognizes an adjacent dangerous vehicle, it may broadcast an alarm message for the dangerous vehicle. In this case, the RSU may broadcast a signal instructing the receiving end to necessarily receive alarm messages associated with the dangerous vehicle. Adjacent pedestrians / vehicles that receive a signal from the RSU may receive the alarm message without filtering the message about the dangerous vehicle. In addition, the RSU may instruct an alarm message for an event determined to be unnecessary in the alarm message. For example, if the event occurred at a distance greater than a predetermined distance from the RSU, the RSU may broadcast a signal indicating that reception of an alarm message for that event is unnecessary. The pedestrian / vehicle receiving the corresponding signal may filter the alarm message corresponding to the event indicated by the RSU among the alarm messages. For example, the RSU may transmit information for filtering an alarm message to a receiver using information on a physical layer or a MAC layer.

Meanwhile, the message for the actual event transmitted subsequent to the alarm message may be transmitted through the physical sidelink control channel (PSCCH) and / or the physical sidelink shared channel (PSSCH) used in the aforementioned LTE D2D. For example, the scheduling information of the message for the actual event may be transmitted through the PSCCH, and the actual data may be transmitted through the PSSCH. Also, for example, an alarm message may be sent over the PSCCH.

In the above embodiments, the terminal of the receiving pedestrian receiving the information on the event may inform the pedestrian a message through a warning sound or a notification to the pedestrian. For example, the terminal of the pedestrian receiving the alarm message may generate a warning or notification for notifying that there may be a danger in the vicinity.

In addition, in the above-described embodiments, the message for the event transmitted subsequent to the alarm message may include a context for the event. The message for the event may include any information related to the type, time, place, and / or other event of the event.

13 is a flowchart of a method of transmitting an alarm message, according to an exemplary embodiment.

As shown in FIG. 13, the broadcasting unit BU may broadcast an alarm message indicating the occurrence of an event (S1301). The broadcasting unit may be a vehicle, pedestrian, RSU, or base station. The broadcasting unit may resend or relay the alarm message. The user device UE may refer to a pedestrian or a vehicle. For example, the alarm message may be broadcast using an uplink resource or a downlink resource.

Meanwhile, although not shown in FIG. 13, a broadcasting unit (eg, a vehicle that has encountered an event) may determine its location based on a signal from a GPS and / or a base station. The broadcasting unit may also determine the transmission resource of the alarm message based on its location. The mapping relationship between the transmission resource and the region may be preset or may be received from the base station.

Although not shown in FIG. 13, the user device may determine whether to receive an event message. Thus, if the user device determines not to receive an event message, it may maintain a sleep mode.

In addition, although not shown in FIG. 13, the broadcasting of the alarm message (S1301) may be performed as a response to the alarm message transmission request from the user device. In addition, an event broadcasting unit may transmit its location to a base station or an RSU.

Also, the broadcasting unit may broadcast a message for an event including substantial information about the event (S1302). The message about the event includes information about the event and may be broadcast using a predetermined resource. The predetermined resource may be mapped according to the geographic location as described above. The predetermined resource, as described above, may also be determined based on the coverage of the cell or the grade of the event. In addition, a message for the event may be broadcast according to a transmission resource determined based on the information in the alarm message. In addition, the user device may determine whether to receive a message for a subsequent actual event based on the received resource of the alarm message.

1 to 13, an alarm message may be called a first message, and a message about an actual event may be called a second message. In addition, the user device may determine whether to receive or decode an alarm message and / or an event message or filter the alarm message and / or the event message based on a received resource or signaling from the base station. Although all the above-described embodiments are not described with reference to FIG. 13 for convenience of description, it will be apparent to those skilled in the art that the above-described embodiments can be combined.

FIG. 14 is a diagram for schematically describing a configuration of devices to which the embodiments of the present invention described with reference to FIGS. 1 to 13 may be applied as an embodiment of the present invention.

In FIG. 14, the first device 1400 and the second device 1450 may include radio frequency units (RF units) 1410 and 1460, processors 1420 and 1470, and optionally memories 1430 and 1480. have. The first device 1400 and the second device 1450 may be a terminal, a vehicle, a pedestrian, an RSU, a base station, and / or an infrastructure configuring V2X communication.

Each Radio Frequency (RF) unit 1430, 1460 may include a transmitter 1411, 1461 and a receiver 1412, 1462, respectively. Each RF unit 1430, 1460 may be a transceiver. The transmitter 1411 and receiver 1412 of the first device 1400 are configured to transmit and receive signals with the second device 4250 and other terminals, and the processor 1420 is a transmitter 1411 and receiver 1412. May be configured to control a process of transmitting and receiving a signal with other devices. Meanwhile, the first device 1400 and / or the second device 1450 may be a base station.

In addition, the processor 1420 may perform various processing on a signal to be transmitted, transmit the same to the transmitter 1411, and may perform processing on a signal received by the receiver 1412. If necessary, the processor 1420 may store information included in the exchanged message in the memory 1430.

Having the above-described structure, the first device 1400 can perform the method of the various embodiments of the present invention described above. For example, each signal and / or message may be transmitted and received using a transmitter and / or receiver of an RF unit, and each operation may be performed under the control of a processor.

Although not shown in FIG. 14, the first device 1400 may include various additional components according to the device application type. For example, when the first device 1400 is for intelligent metering, the first device 1400 may include an additional configuration for measuring power, and the like, and the power measuring operation may be performed by the processor 1420. It may be controlled, or may be controlled by a separately configured processor (not shown).

For example, the second device 1450 may be a base station. In this case, the transmitter 1541 and the receiver 1462 of the base station are configured to transmit and receive signals with other base stations, servers, and devices, and the processor 1470 is functionally connected to the transmitter 1541 and the receiver 1462. The transmitter 1462 and the receiver 1462 may be configured to control a process of transmitting and receiving a signal with other devices. In addition, the processor 1470 may perform various processing on the signal to be transmitted, transmit the same to the transmitter 1541, and may perform processing on the signal received by the receiver 1462. If necessary, the processor 1470 may store information included in the exchanged message in the memory 1430. With this structure, the base station 1450 can perform the method of the various embodiments described above.

In FIG. 14, the processors 1420 and 1470 of the first device 1410 and the second device 1450 respectively indicate an operation (for example, control) in the first device 1410 and the second device 1450. , Coordination, management, etc.). Respective processors 1420 and 1470 may be connected to memories 1430 and 1480 that store program codes and data. The memories 1430 and 1480 are connected to the processors 1420 and 1470 to store operating systems, applications, and general files.

The processors 1420 and 1470 of the present invention may also be referred to as a controller, a microcontroller, a microprocessor, a microcomputer, or the like. The processors 1420 and 1470 may be implemented by hardware or firmware, software, or a combination thereof. When implementing embodiments of the present invention using hardware, application specific integrated circuits (ASICs) or digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) configured to perform the present invention. Field programmable gate arrays (FPGAs) may be provided in the processors 1420 and 1470.

Meanwhile, when implementing embodiments of the present invention using firmware or software, the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention. Firmware or software configured to be may be provided in the processor or stored in a memory to be driven by the processor.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Embodiments of the present invention as described above may be applied to various mobile communication systems.

Claims (14)

1. An alarm transmission method for an event of a terminal in a wireless communication system,

   Receiving information about a mapping relationship between the plurality of regions and the plurality of transmission resource regions;

   Obtaining location information; And

   In response to the occurrence of an event, transmitting an alarm message indicating the occurrence of the event,

   And the alarm message is transmitted using a transmission resource region determined based on the information on the mapping relationship and the location information.
2. The method of claim 1,

   And the location information is obtained based on at least one of a Global Positioning System (GPS) and signaling from a base station.
3. The method of claim 1,

   And the plurality of regions are divided based on latitude and longitude.
4. The method of claim 1,

   And the plurality of zones are divided based on coverage of a plurality of cells.
5. The method of claim 1,

   Subsequent to the alarm message, transmitting a message for the event comprising information about at least one of the type, time, and location of the event.
6. The method of claim 1,

   And the alarm message is sent on a physical layer.
7. The method of claim 1,

   The terminal is mounted on a pedestrian or a vehicle, alarm transmission method.
8. An alarm receiving method for an event of a terminal in a wireless communication system,

   Receiving information about a mapping relationship between the plurality of regions and the plurality of transmission resource regions;

   Obtaining location information; And

   Receiving an alarm message indicating the occurrence of an event,

   And the alarm message is received using a transmission resource region determined based on the information on the mapping relationship and the location information.
9. The method of claim 8,

   And the location information is obtained based on at least one of a global positioning system (GPS) and signaling from a base station.
10. The method of claim 8,

    Determining whether to receive a message for an event including information about the event, which is transmitted subsequent to the alarm message, based on the transmission resource region and the location information on which the alarm message was received; ,

    And the information on the event includes information on at least one of the type, time, and place of the event.
11. The method of claim 8,

    And the plurality of zones are classified based on latitude and longitude.
12. The method of claim 8,

    And the plurality of zones are divided based on coverage of a plurality of cells.
13. A terminal for transmitting an alarm for an event in a wireless communication system,

    A transceiver configured to transmit and receive a wireless signal; And

    A processor configured to control the transceiver, the processor comprising:

    Receive information on a mapping relationship between a plurality of regions and a plurality of transmission resource regions,

    Obtain location information,

    In response to the occurrence of an event, further configured to transmit an alarm message indicating the occurrence of the event,

    The alarm message is transmitted using a transmission resource region determined based on the information on the mapping relationship and the location information.
14. A terminal for receiving an alarm for an event in a wireless communication system,

    A transceiver configured to transmit and receive a wireless signal; And

    A processor configured to control the transceiver, the processor comprising:

    Receive information on a mapping relationship between a plurality of regions and a plurality of transmission resource regions,

    Obtain location information,

    Is further configured to receive an alarm message indicating the occurrence of the event,

    The alarm message is received using a transmission resource region determined based on the information on the mapping relationship and the location information.

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