KR20200116852A - Apparatus and method for handling service policy in wireless communication system - Google Patents

Abstract

The present disclosure relates to a 5^th generation (5G) or pre-5G communication system to support a higher data transmission rate than that of 4^th generation (4G) communication system such as a long term evolution (LTE). The present disclosure is for processing policy and parameter information for providing a service in a wireless communication system. According to the present disclosure, an operation method of a base station may comprise the processes of: acquiring information on the mapping of quality of service related to direct communication between a first system and a second system; and switching between the quality of service of the first system and the quality of service of the second system by using the mapping information.

Description

Device and method for handling service policy in wireless communication system {APPARATUS AND METHOD FOR HANDLING SERVICE POLICY IN WIRELESS COMMUNICATION SYSTEM}

The present disclosure generally relates to a wireless communication system, and more particularly, to an apparatus and method for processing policy and parameter information for providing a service in a wireless communication system.

Efforts are being made to develop an improved 5G communication system or a pre-5G communication system in order to meet the increasing demand for wireless data traffic after the commercialization of 4G communication systems. For this reason, the 5G communication system or the pre-5G communication system is called a communication system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE).

In order to achieve a high data rate, the 5G communication system is being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Giga (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, in 5G communication systems, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, in order to improve the network of the system, in 5G communication system, advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation And other technologies are being developed. In addition, in 5G systems, advanced coding modulation (ACM) methods such as Hybrid FSK and QAM Modulation (FQAM) and SWSC (Sliding Window Superposition Coding), advanced access technologies such as Filter Bank Multi Carrier (FBMC), NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) have been developed.

The 5G system is considering supporting various services compared to the existing 4G system. For example, the most representative services are enhanced mobile broad band (eMBB), ultra-reliable and low latency communication (URLLC), and massive machine type. communication, mMTC), and next-generation broadcast service (evolved multimedia broadcast/multicast service, eMBMS). In addition, a system providing a URLLC service may be referred to as a URLLC system, and a system providing an eMBB service may be referred to as an eMBB system. Here, the terms service and system may be used interchangeably.

On the other hand, the Internet is evolving from a human-centered network in which humans generate and consume information, to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection with cloud servers, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between objects, machine to machine , M2M), and MTC (Machine Type Communication) technologies are being studied. In the IoT environment, intelligent IT (Internet Technology) services that create new value in human life by collecting and analyzing data generated from connected objects can be provided. IoT is the field of smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliance, advanced medical service, etc. through the convergence and combination of existing IT (information technology) technology and various industries. Can be applied to.

Accordingly, various attempts have been made to apply a 5G communication system to an IoT network. For example, technologies such as sensor network, machine to machine (M2M), and MTC (Machine Type Communication) are implemented by techniques such as beamforming, MIMO, and array antenna, which are 5G communication technologies. will be. As the big data processing technology described above, a cloud radio access network (cloud RAN) is applied as an example of the convergence of 5G technology and IoT technology.

V2X (vehicle to everything) is a general term that refers to all types of communication methods applicable to road vehicles, and in combination with the development of wireless communication technology, various additional services in addition to the initial safety use case are becoming possible. As V2X service provision technology, IEEE (Institute of Electrical and Electronical Engineers) 802.11p and IEEE P1609-based WAVE (wireless access in vehicular environments) standards were standardized. However, WAVE, which is a type of dedicated short range communication (DSRC) technology, has a limitation in that a message transmission distance between a vehicle and a vehicle is limited.

To overcome this limitation, a cellular-based V2X technology standard is being promoted in the 3rd Generation Partnership Project (3GPP). In Release 14/Release 15, the LTE-based evolved packet system (EPS) V2X standard was completed, and in Release 16, the NR-based 5th generation system (5GS) V2X standardization is in progress.

Based on the above discussion, the present disclosure provides an apparatus and method for effectively processing policy and parameter information for providing a service in a wireless communication system.

In addition, the present disclosure provides an apparatus and method for providing mapping information of parameters related to quality of service for direct communication in a wireless communication system.

In addition, the present disclosure provides an apparatus and method for switching parameters related to quality of service for direct communication in a wireless communication system.

According to various embodiments of the present disclosure, a method of operating a base station in a wireless communication system includes a process of acquiring information on mapping of service quality related to direct communication between a first system and a second system, and information on the mapping. By using, the process of switching between the quality of service of the first system and the quality of service of the second system may be included.

According to various embodiments of the present disclosure, a method of operating a terminal in a wireless communication system in a wireless communication system includes a process of acquiring information on mapping of service quality related to direct communication between a first system and a second system, and the mapping It may include a process of performing switching between the quality of service of the first system and the quality of service of the second system by using the information about.

According to various embodiments of the present disclosure, in a wireless communication system, a base station apparatus includes at least one transmission/reception unit and at least one processor connected to the at least one transmission/reception unit, and the at least one processor is a first system And obtaining information on the mapping of the quality of service related to direct communication between the second systems, and controlling the switching between the quality of service of the first system and the quality of service of the second system by using the information on the mapping. I can.

According to various embodiments of the present disclosure, in a wireless communication system, a terminal device includes a transmission/reception unit and at least one processor connected to the transmission/reception unit, and the at least one processor is directly connected to the first system and the second system. It is possible to obtain information on the mapping of the quality of service related to communication, and control to perform switching between the quality of service of the first system and the quality of service of the second system using the information on the mapping.

The apparatus and method according to various embodiments of the present disclosure enable direct communication between different systems to be effectively operated by using information on mapping of service quality related to direct communication between a first system and a second system. .

The effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the technical field to which the present disclosure belongs from the following description. will be.

1 illustrates a structure of a first communication system according to an embodiment of the present disclosure.
2 illustrates the structure of a second communication system according to an embodiment of the present disclosure.
3 illustrates an interworking structure between communication systems according to an embodiment of the present disclosure.
4 is a diagram illustrating a configuration of a network entity in a wireless communication system according to an embodiment of the present disclosure.
5 illustrates a configuration of a terminal in a wireless communication system according to an embodiment of the present disclosure.
6 is a flowchart illustrating a use of mapping information of quality of service in a wireless communication system according to an embodiment of the present disclosure.
7 is a flowchart for providing mapping information of quality of service in a wireless communication system according to an embodiment of the present disclosure.
8A is a diagram illustrating a procedure for a base station to obtain service policy/parameter information from a network of a first communication system during an initial registration process in a wireless communication system according to an embodiment of the present disclosure.
8B is a diagram illustrating a procedure for a terminal to obtain service policy and parameter information from a network of a first communication system in a wireless communication system according to an embodiment of the present disclosure.
9A illustrates a procedure for a terminal and a base station to obtain service policy/parameter information from a network of a second communication system during an initial registration process in a wireless communication system according to an embodiment of the present disclosure.
9B is a diagram illustrating a procedure for a terminal to obtain service policy/parameter information from a network in response to a network request from a second communication system in a wireless communication system according to an embodiment of the present disclosure.
9C is a diagram illustrating a procedure for a terminal to obtain service policy/parameter information from a network of a second communication system by a terminal request in a wireless communication system according to an embodiment of the present disclosure.
10 illustrates a procedure for requesting and obtaining a radio resource for direct communication from a network object of a second communication system by a terminal in a wireless communication system according to an embodiment of the present disclosure.
11 illustrates a procedure for requesting and acquiring a radio resource for direct communication from a network object of a first communication system by a terminal in a wireless communication system according to an embodiment of the present disclosure.
12 illustrates a procedure for establishing a connection between a base station and a second communication system in a wireless communication system according to an embodiment of the present disclosure.
13 illustrates a procedure for establishing a connection between a base station and a first communication system in a wireless communication system according to an embodiment of the present disclosure.
14A illustrates a procedure for a terminal to obtain system information from a network in a wireless communication system according to an embodiment of the present disclosure.
14B is a diagram illustrating another procedure for a terminal to acquire system information from a network in a wireless communication system according to an embodiment of the present disclosure.

Terms used in the present disclosure are used only to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the technical field described in the present disclosure. Among the terms used in the present disclosure, terms defined in a general dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related technology, and unless explicitly defined in the present disclosure, an ideal or excessively formal meaning Is not interpreted as. In some cases, even terms defined in the present disclosure cannot be interpreted to exclude embodiments of the present disclosure.

In various embodiments of the present disclosure described below, a hardware approach is described as an example. However, since various embodiments of the present disclosure include technology using both hardware and software, various embodiments of the present disclosure do not exclude a software-based approach.

Hereinafter, the present disclosure relates to an apparatus and method for processing policy and parameter information for providing a service in a wireless communication system. Specifically, the present disclosure is the parameters for direct communication between user equipments (UEs) in a wireless communication system (e.g., PC5 communication, ProSe (proximity service), sidelink communication, V2X (vehicle to everything) communication) Describe techniques for switching between.

A term for identifying an access node used in the following description, a term for network entities, a term for messages, a term for an interface between network objects, a term for various identification information And the like are illustrated for convenience of description. Accordingly, the present disclosure is not limited to the terms described later, and other terms referring to objects having an equivalent technical meaning may be used.

For convenience of description below, the present disclosure describes various embodiments using terms and names defined in the specification for the (evolved packet system) system and 5G (5 ^th generation) EPS systems, which illustrate one for illustration Only. Various embodiments of the present disclosure may be easily modified and applied to other communication systems.

In describing the embodiments of the present disclosure in detail, the communication standard defined by the 3rd Generation Partnership Project (3GPP) will be the main target, but the main subject of the present disclosure is that other communication systems having a similar technical background may It may be applied with slight modifications within the range not significantly departing from the range, which will be possible at the judgment of a person skilled in the technical field of the present disclosure.

In describing the embodiments of the present disclosure in detail, the vehicle communication service will be the main target, but the main subject of the present disclosure is the range not significantly departing from the scope of the present disclosure to other services provided in the EPS network to the 5G network. It can be applied with a slight modification in, and this will be possible at the judgment of a person skilled in the technical field of the present disclosure.

1 illustrates a structure of a first communication system according to an embodiment of the present disclosure. According to an embodiment, the first communication system illustrated in FIG. 1 may be a mobile communication system based on a Long Term Evolution (LTE) standard.

1, the first communication system is eNB (evolved node B) 120, MME (mobility management entity) 125, S/P-GW (serving/packet data network-gateway) 130, HSS 135, V2X CF (V2X control function) 140, V2X AS (V2X application server) 145. The S/P-GW 130 can be divided into a serving-gateway (S-GW) and a packet data network-gateway (P-GW). The eNB 120 is a “base station” and “evolved-universal mobile mobile phone (E-UTRAN)”. It may be referred to as a telecommunication system terrestrial radio access network)', a radio access network (RAN) node', or another term having an equivalent technical meaning.

User equipment (UE) 110a, 110b, 110c, or 110d accesses an external network through the eNB 120 and S/P-GW 130. In order for UE 110a, 110b, 110c or 110d to transmit and receive data through S/P-GW 130, a packet data network (PDN) connection must be created, and one PDN connection requires one or more EPS bearers. Can include. UE 110a, 110b, 110c or 110d is a'terminal','mobile station','subscriber station','remote terminal','wireless terminal' , Or may be referred to as'user device' or another term having an equivalent technical meaning. For convenience of description below, the present disclosure describes embodiments using UE 110a among UEs 110a, 110b, 110c, or 110d, and other UEs 110b, 110, and 110d may operate similarly.

An application function (AF) is a device that exchanges information related to an application at the level of an application with a user. V2X AS 145 is a device to provide application level V2X service. The V2X AS 145 may include an AF function.

The eNB 120 is a radio access network (RAN) node and a base station (BSC) of a radio network controller (RNC) of a UTRAN system and a global system for mobile communications (GSM) enhanced data rates for GSM evolution (EDGE) radio access network (GERAN) system. controller). The eNB 120 is connected to UE 110a through a radio channel, and performs a similar role to the existing RNC/BSC.

For LTE. All user traffic, including real-time services such as voice over Internet protocol (VoIP) over the Internet protocol, is serviced through a shared channel. Accordingly, a device for collecting and scheduling the context information of UE 110a is required, and the eNB 120 may play the role of a scheduler.

The S/P-GW 130 is a device that provides a data bearer, and creates or removes a data bearer under the control of the MME 125. The MME 125 is a device in charge of various control functions, and one MME 125 may be connected to a plurality of eNBs including the eNB 120.

HSS 135 is a device that stores and manages subscription information of UEs including UE 110a. The subscription information may be referred to as'UE subscription information' or'terminal subscription information'. In addition, HSS 135 may store subscription information for providing V2X services. <Table 1> is an example of subscription information related to V2X service managed by HSS 135.

a) whether the UE is authorized to perform V2X communication over PC5 reference point as Vehicle UE, Pedestrian UE, or both.
b) UE-PC5-AMBR for V2X communication over PC5 reference point, including UE-PC5-AMBR for LTE PC5.
c) UE-PC5-AMBR for V2X communication over PC5 reference point, including UE-PC5-AMBR for NR PC5.
d) the list of the PLMNs where the UE is authorized to perform V2X communication over PC5 reference point.
e) cross-RAT PC5 control authorization.

The V2X CF 140 is a device that manages service policy and parameter information to provide V2X services. <Table 2> and <Table 3> show examples of V2X service policy and parameter information managed by V2X CF 140. UE 110a establishes a PDN connection with V2X CF 140 through the eNB 120 and S/P-GW 130 through the procedure shown in FIG. 8A, that is, after completing registration in the network, and V2X service from V2X CF 140 Policy and parameter information can be obtained. Alternatively, the V2X service policy and parameter information shown in <Table 2> to <Table 3> is preset in UE 110a (pre-configuration), and UE 110a may use preset information. <Table 2> is an example of V2X service policies and parameters for direct communication (eg proximity service, ProSe).

1) Authorization policy:
-When the UE is "served by E-UTRA" or "served by NR":
-PLMNs in which the UE is authorized to perform V2X communications over PC5 reference point when "served by E-UTRA" or "served by NR".
For each above PLMN:
-RAT(s) over which the UE is authorized to perform V2X communications over PC5 reference point.
-When the UE is "not served by E-UTRA" and "not served by NR":
-Indicates whether the UE is authorized to perform V2X communications over PC5 reference point when "not served by E-UTRA" and "not served by NR".
-RAT(s) over which the UE is authorized to perform V2X communications over PC5 reference point.
2) Radio parameters when the UE is "not served by E-UTRA" and "not served by NR":
-Includes the radio parameters per PC5 RAT (ie LTE PC5, NR PC5) with Geographical Area(s) and an indication of whether they are "operator managed" or "non-operator managed". The UE uses the radio parameters to perform V2X communications over PC5 reference point when "not served by E-UTRA" and "not served by NR" only if the UE can reliably locate itself in the corresponding Geographical Area. Otherwise, the UE is not authorized to transmit.
NOTE: Whether a frequency band is "operator managed" or "non-operator managed" in a given Geographical Area is defined by local regulations.
3) Policy/parameters per RAT for PC5 Tx Profile selection:
-The mapping of service types (eg PSID or ITS-AIDs) to Tx Profiles.
4) Policy/parameters related to privacy:
-The list of V2X services, eg PSID or ITS-AIDs of the V2X applications, with Geographical Area(s) that require privacy support.
5) Policy/parameters when LTE PC5 is selected:
-The mapping of Destination Layer-2 ID(s) and the V2X services, eg PSID or ITS-AIDs of the V2X application.
NOTE 2: PLMN operators coordinate to make sure Destination Layer-2 ID(s) for different V2X services are configured in a consistent manner.
NOTE 3: To pre-configure a UE with the provisioning parameters, at least the "not served by E-UTRAN" parameters of 1) and 2), and the parameters of 3) need to be included.
-The mapping of ProSe Per-Packet Priority and packet delay budget for V2X communication (autonomous resources selection mode).
-The mapping of service types (eg PSID or ITS-AIDs) to V2X frequencies (see TS 36.300 [10] for further information) with Geographical Area(s).
-The list of V2X services, eg PSID or ITS-AIDs of the V2X applications, allowed to use a specific PPPR value.
6) Policy/parameters when NR PC5 is selected:
-The mapping of service types (eg PSID or ITS-AIDs) to V2X frequencies with Geographical Area(s).
-The destination Layer-2 ID for PC5 unicast link establishment.
-The list of V2X services that are allowed to use a specific 5QI
7) Policy/parameters related to QoS:
-The mapping of PPPP and 5QI.
-The mapping of PPPR and 5QI.

In describing embodiments of the present disclosure, QoS related parameters defined in the 5G system may be referred to as '5QI (5G quality of service indicator)' or'PQI (PC5 5QI)', and '5QI' and'PQI' Can be used interchangeably. <Table 3> is an example of V2X service policies and parameters for network communication (eg, Uu communication).

1) PLMNs in which the UE is authorized to use MBMS based V2X communication.
-Corresponding V2X USD(s) for receiving MBMS based V2X traffic in the PLMN. The V2X USD(s) may be obtained through the V2 reference point from the V2X Application Server.
NOTE: The V2 reference point procedure is not specified in this Release.
2) V2X Application Server address information.
-List of FQDNs or IP addresses of the V2X Application Servers, associated with served geographical area information and list of PLMNs that the configuration applies to.
3) V2X Application Sever discovery using MBMS.
-List of PLMNs and corresponding V2X Server USDs for receiving V2X Application Server information via MBMS.
4) Mapping of the V2X services, eg PSID or ITS-AIDs of the V2X application to:
-V2X Application Server address (consisting of IP address/FQDN and UDP port) for unicast,-V2X USD for MBMS.

In order to provide LTE PC5 communication, a quality of service (QoS) model based on ProSe per packet priority (PPPP)/ProSe per packet reliability (PPPR) may be used. Quality of service parameters for LTE PC5 communication may include PPPP and PPPR. PPPP may include a value indicating a priority level. For example, PPPP may be expressed as a value within the range of '1' to '8'. When the PPPP is '1', it may be determined that the priority is higher than when the PPPP is '2'. PPPR may contain a value indicating the level of reliability. For example, PPPR may be expressed as a value falling within the range of '1' to '8'. When the PPPR is '1', it may be determined that higher reliability is required than when the PPPR is '2'.

In order to provide new radio (NR) PC5 communication, a QoS model based on PQI (PC5 5QI) may be used. The quality of service parameter for NR PC5 communication, i.e., PQI, is a priority level, packet delay budget, packet error rate, averaging window, and maximum data burst. It may include at least one of a maximum data burst volume. In addition, in order to provide NR PC5 communication, a communication range value may be used together with the PQI. Table 4 below shows an example of PQI. <Table 4> is an example of 5QI values defined in the 3GPP standard.

5QI
Value Resource Type Default Priority Level Packet Delay Budget Packet Error
Rate Default Maximum Data Burst Volume
(NOTE 2) Default
Averaging Window Example Services One GBR 20 100 ms (NOTE 11,
NOTE 13) 10 ^-2 N/A 2000 ms Conversational Voice 2 (NOTE　1) 40 150 ms (NOTE 11,
NOTE 13) 10 ^-3 N/A 2000 ms Conversational Video (Live Streaming) 3(NOTE　14) 30 50 ms
(NOTE 11,
NOTE 13) 10 ^-3 N/A 2000 ms Real Time Gaming, V2X messages
Electricity distribution-medium voltage, Process automation-monitoring 4 50 300 ms (NOTE 11,
NOTE 13) 10 ^-6 N/A 2000 ms Non-Conversational Video (Buffered Streaming) 65 (NOTE 9,
NOTE 12) 7 75 ms
(NOTE 7, NOTE 8) 10 ^-2 N/A 2000 ms Mission Critical user plane Push To Talk voice (e.g., MCPTT) 66 (NOTE　12) 20 100 ms
(NOTE 10,
NOTE 13) 10 ^-2 N/A 2000 ms Non-Mission-Critical user plane Push To Talk voice 67 (NOTE　12) 15 100 ms
(NOTE 10,
NOTE 13) 10 ^-3 N/A 2000 ms Mission Critical Video user plane 75(NOTE　14) 5 Non-GBR 10 100 ms
NOTE 10,
NOTE 13) 10 ^-6 N/A N/A IMS Signaling 6 (NOTE　1) 60 300 ms (NOTE 10,
NOTE 13) 10 ^-6 N/A N/A Video (Buffered Streaming) TCP-based (e.g., www, e-mail, chat, ftp, p2p file sharing, progressive video, etc.) 7 70 100 ms (NOTE 10,
NOTE 13) 10 ^-3 N/A N/A Voice,Video (Live Streaming)Interactive Gaming 8 80 300　ms (NOTE　13) 10 ^-6 N/A N/A Video (Buffered Streaming) TCP-based (e.g., www, e-mail, chat, ftp, p2p file sharing, progressive 9 90 video, etc.) 69 (NOTE　9, NOTE　12) 5 60 ms
(NOTE 7, NOTE 8) 10 ^-6 N/A N/A Mission Critical delay sensitive signaling (e.g., MC-PTT signaling) 70(NOTE　12) 55 200 ms
(NOTE 7,
NOTE 10) 10 ^-6 N/A N/A Mission Critical Data (e.g. example services are the same as 5QI 6/8/9) 79 65 50 ms (NOTE 10,
NOTE 13) 10 ^-2 N/A N/A V2X messages 80 68 10 ms (NOTE 5,
NOTE 10) 10 ^-6 N/A N/A Low Latency eMBB applications Augmented Reality 82 Delay Critical GBR 19 10　ms (NOTE　4) 10 ^-4 255 bytes 2000 ms Discrete Automation (see TS　22.261　[2]) 83 22 10　ms (NOTE　4) 10 ^-4 1354 bytes (NOTE　3) 2000 ms Discrete Automation (see TS　22.261　[2]) 84 24 30　ms (NOTE 6) 10 ^-5 1354 bytes
(NOTE 3) 2000 ms Intelligent transport systems (see TS　22.261　[2]) 85 21 5　ms (NOTE 5) 10 ^-5 255 bytes 2000 ms Electricity Distribution- high voltage (see TS　22.261　[2]) NOTE 1: A packet which is delayed more than PDB is not counted as lost, thus not included in the PER.
NOTE 2: It is required that default MDBV is supported by a PLMN supporting the related 5QIs.
NOTE 3: This MDBV value is set to 1354 bytes to avoid IP fragmentation for the IPv6 based, IPSec protected GTP tunnel to the 5G-AN node (the value is calculated as in Annex C of TS 23.060 [56] and further reduced by 4 bytes to allow for the usage of a GTP-U extension header).
NOTE 4: A delay of 1 ms for the delay between a UPF terminating N6 and a 5G-AN should be subtracted from a given PDB to derive the packet delay budget that applies to the radio interface.
NOTE 5: A delay of 2 ms for the delay between a UPF terminating N6 and a 5G-AN should be subtracted from a given PDB to derive the packet delay budget that applies to the radio interface.
NOTE 6: A delay of 5 ms for the delay between a UPF terminating N6 and a 5G-AN should be subtracted from a given PDB to derive the packet delay budget that applies to the radio interface.
NOTE 7: For Mission Critical services, it may be assumed that the UPF terminating N6 is located "close" to the 5G_AN (roughly 10 ms) and is not normally used in a long distance, home routed roaming situation. Hence delay of 10 ms for the delay between a UPF terminating N6 and a 5G_AN should be subtracted from this PDB to derive the packet delay budget that applies to the radio interface.
NOTE 8: In both RRC Idle and RRC Connected mode, the PDB requirement for these 5QIs can be relaxed (but not to a value greater than 320 ms) for the first packet(s) in a downlink data or signaling burst in order to permit reasonable battery saving (DRX) techniques.
NOTE 9: It is expected that 5QI-65 and 5QI-69 are used together to provide Mission Critical Push to Talk service (eg, 5QI-5 is not used for signaling). It is expected that the amount of traffic per UE will be similar or less compared to the IMS signaling.
NOTE 10: In both RRC Idle and RRC Connected mode, the PDB requirement for these 5QIs can be relaxed for the first packet(s) in a downlink data or signaling burst in order to permit battery saving (DRX) techniques.
NOTE 11: In RRC Idle mode, the PDB requirement for these 5QIs can be relaxed for the first packet(s) in a downlink data or signaling burst in order to permit battery saving (DRX) techniques.
NOTE 12: This 5QI value can only be assigned upon request from the network side. The UE and any application running on the UE is not allowed to request this 5QI value.
NOTE 13: A delay of 20 ms for the delay between a UPF terminating N6 and a 5G-AN should be subtracted from a given PDB to derive the packet delay budget that applies to the radio interface.
NOTE 14: This 5QI is not supported as it is only used for transmission of V2X messages over MBMS bearers as defined in TS 23.285 [72].

According to an embodiment of the present disclosure, information about mapping between a PPPP/PPPR-based QoS model for LTE PC5 communication and a PQI-based QoS model for NR PC5 communication (hereinafter, “mapping information”) may be defined. For example, the mapping information may be defined as'policy/parameters related to QoS' of <Table 2>. Specifically, the mapping information may be defined as'the mapping of PPPP and 5QI','the mapping of PPPR and 5QI', as shown in Table 2. The mapping information may be determined according to at least one of the following various methods.

According to an embodiment, in order to determine a PPPP mapping that can be used interchangeably with a priority level among PQIs, a PPPP value or value mapped with a priority level value or a value interval among PQIs The interval of can be defined. For example, priority level values '7' and '15' may be mapped to PPPP values '1'. As another example, the priority level values '0' to '20' may be mapped to the PPPP value '1'.

According to an embodiment, in order to determine a PPPP mapping that can be used interchangeably with a packet delay budget among PQIs, a packet delay budget mapped with PPPP may be defined. A value or value interval of a packet delay budget as a PQI mapped to a value or value interval of a packet delay budget mapped to PPPP may be defined. For example, the packet delay budget value mapped to the PPPP value '1' is defined as '110ms', and the packet delay budget value '110ms' derived from PPPP is the packet delay as PQI. A value of a packet delay budget may be mapped to '110bms'. As another example, the packet delay budget value '110ms' derived from PPPP may be mapped from the value '0ms' of the packet delay budget as the PQI to the interval of '110ms'.

According to an embodiment, in order to determine a PPPR mapping that can be used interchangeably with a packet error rate among PQIs, a PPPR value or value mapped with a packet error rate value or value interval as a PQI You can define the section of. For example, the packet error rate values '10-6' and '10-5' may be mapped to the PPPR value '1'. As another example, a packet error rate value of '10-6' to '10-5' may be mapped to a PPPR value of '1'.

According to an embodiment, a PPPP value and/or a PPPR value mapped to a PQI value in order to determine a PPPP or PPPR that can be used interchangeably with a PQI value (e.g., corresponding to a 5QI value in <Table 4>) Can be defined. For example, the PQI value '1' may be mapped to the PPPP value '1' and/or the PPPR value '5'.

The mapping information between the LTE QoS model (eg, PPPP/PPPR) and the NR QoS model (eg, PQI) may be defined as in the various examples described above, and the mapping information between the LTE QoS model and the NR QoS model is shown in FIGS. It may be delivered to at least one of the terminal and the base station through the procedure of FIG. 9c.

2 illustrates the structure of a second communication system according to an embodiment of the present disclosure. According to an embodiment, the second communication system illustrated in FIG. 2 may be a 5G-based mobile communication system.

Referring to FIG. 2, the second communication system includes a next generation node B (gNB) 210, an access and mobility management function (AMF) 215, a session management function (SMF) 220, a user plane function (UPF) 225, and unified data (UDM). management) 235, UDR (unified data repository) 230, PCF (policy control function) 240, NEF (network exposure function) 245, and AF (application function) 250. The gNB 210 may be referred to as a'base station', a'next generation-RAN (NG-RAN)', a'radio access network (RAN) node', or another term having an equivalent technical meaning.

UEs 110a, 110b, 200a, 200b connect to the external network through gNB 210 and UPF 225. In order for the user terminal to transmit and receive data through the UPF 225, a PDU session must be created, and one PDU session may include one or more QoS flows. UE 110a, 110b, 200a or 200b is a'terminal','mobile station','subscriber station','remote terminal','wireless terminal' , Or may be referred to as'user device' or another term having an equivalent technical meaning. For convenience of description below, the present disclosure describes embodiments using UE 110a among UEs 110a, 110b, 200a, and 200b, and other UEs 110b, 200a, and 200b may operate similarly.

The gNB 210 is a radio access network (RAN) node and corresponds to an eNB of the EPC system. The gNB 210 is connected to UE 110a through a radio channel and performs a similar role to the existing RNC/BSC. In the case of 5G, since all user traffic, including real-time services such as VoIP (voice over IP) through Internet protocol, is serviced through a shared channel, a device for collecting and scheduling UE 110a's situation information is required. This is done by gNB 210.

The AMF 215 is a device in charge of various control functions, and one AMF 215 may be connected to a plurality of base stations. The UPF 225 is a device that provides a data bearer, and creates or removes a PDU session under the control of the SMF 220. UDM 235 is a device that stores and manages subscription information of UE 110a. In addition, the UDM 235 may store subscription information for providing V2X services. <Table 1> shows an example of subscription information related to V2X service managed by UDM 235.

The PCF 240 is a device that controls a user's QoS-related policy, and the PCC (Policy and Charging Control) rule corresponding to the policy is transmitted to and applied to the SMF 220 and UPF 225. In addition, the PCF 240 may manage service policy and parameter information to provide V2X services. <Table 2> and <Table 3> show examples of V2X service policy and parameter information managed by PCF 240. V2X service policy and parameter information may be stored in UDR 230. PCF 240 may obtain the V2X service policy and parameter information from UDR 230. UE 110a may acquire V2X service policy and parameter information from PCF 240 through the procedure shown in FIG. 5. Alternatively, the V2X service policy and parameter information shown in <Table 2> and <Table 3> are pre-configured in the terminal (pre-configuration), and the terminal can use the preset information. The AF 250 is a device that exchanges application-related information with a user at an application level. V2X AS 145 is a device to provide application level V2X service. The V2X AS 145 can include the AF 250 function.

3 illustrates an interworking structure between communication systems according to an embodiment of the present disclosure. According to an embodiment, the structure illustrated in FIG. 3 may be an interworking structure of an LTE-based mobile communication system and a 5G-based mobile communication system (eg, NR).

3, for interworking between the first communication system and the second communication system, SGW 300, UPF+PG-U 305, SMF+PGW-C 310, v-PCF 315, HSS+UDM 320, v- V2X CF 325 may be deployed with the first communication system and the second communication system.

4 illustrates a configuration of a network entity in a communication system according to an embodiment of the present disclosure. The configuration illustrated in FIG. 4 is eNB 120, MME 125, S/P-GW 130, HSS 135, V2X CF 140, gNB 210, AMF 215, SMF 220, UPF 225, UDM 235, UDR 230, PCF 240, NEF 245. , AF 250 can be understood as a configuration of one of. Used below'… Wealth','… The term'group' refers to a unit that processes at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

Referring to FIG. 4, the network object includes a communication unit 410, a storage unit 420, and a control unit 430.

The communication unit 410 provides an interface for performing communication with other devices in the network. That is, the communication unit 410 converts a bit stream transmitted from a network object to another device into a physical signal, and converts a physical signal received from another device into a bit stream. That is, the communication unit 410 may transmit and receive signals. Accordingly, the communication unit 410 may be referred to as a modem, a transmitter, a receiver, or a transceiver. At this time, the communication unit 410 enables the network object to communicate with other devices or systems through a backhaul connection (eg, wired backhaul or wireless backhaul) or through a network.

The storage unit 420 stores data such as basic programs, application programs, and configuration information for operation of a network object. The storage unit 420 may include a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. Further, the storage unit 420 provides stored data according to the request of the control unit 430.

When the network object of FIG. 4 is a base station (eg, eNB 120 or gNB 210), the network object may further include a wireless communication unit. The wireless communication unit performs functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit performs a function of converting between a baseband signal and a bit string according to the physical layer standard of the system. For example, when transmitting data, the wireless communication unit generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the wireless communication unit restores the received bit stream through demodulation and decoding of the baseband signal.

In addition, the wireless communication unit up-converts the baseband signal into a radio frequency (RF) band signal, transmits it through an antenna, and downconverts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communication unit may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. In addition, the wireless communication unit may include a plurality of transmission/reception paths. Furthermore, the wireless communication unit may include at least one antenna array composed of a plurality of antenna elements.

In terms of hardware, the wireless communication unit may be composed of a digital unit and an analog unit, and the analog unit may be composed of a plurality of sub-units according to operation power, operation frequency, etc. I can. The digital unit may be implemented with at least one processor (eg, a digital signal processor (DSP)).

The wireless communication unit transmits and receives signals as described above. Accordingly, all or part of the wireless communication unit may be referred to as a'transmitter', a'receiver', or a'transceiver'. In addition, in the following description, transmission and reception performed through a wireless channel are used in a sense including the processing as described above is performed by the wireless communication unit.

The controller 430 controls overall operations of network objects. For example, the control unit 430 transmits and receives signals through the communication unit 410. In addition, the control unit 430 writes and reads data in the storage unit 420. To this end, the control unit 430 may include at least one processor. According to various embodiments, the controller 430 may control a network object to perform operations according to various embodiments described later.

5 illustrates a configuration of a terminal in a communication system according to an embodiment of the present disclosure. The configuration illustrated in FIG. 5 may be understood as the configuration of UE 110a, 110b, 110c, 110d, 200a or 200b. Used below'… Wealth','… The term'group' refers to a unit that processes at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

Referring to FIG. 5, the terminal includes a communication unit 510, a storage unit 520, and a control unit 530.

The communication unit 510 performs functions for transmitting and receiving signals through a wireless channel. For example, the communication unit 510 performs a conversion function between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when transmitting data, the communication unit 510 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the communication unit 510 restores the received bit stream through demodulation and decoding of the baseband signal. In addition, the communication unit 510 up-converts the baseband signal into an RF band signal, transmits it through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the communication unit 510 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like.

In addition, the communication unit 510 may include a plurality of transmission/reception paths. Furthermore, the communication unit 510 may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the communication unit 510 may be composed of a digital circuit and an analog circuit (eg, radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented in one package. In addition, the communication unit 510 may include a plurality of RF chains. Furthermore, the communication unit 510 may perform beamforming.

The communication unit 510 transmits and receives signals as described above. Accordingly, all or part of the communication unit 510 may be referred to as a'transmitting unit', a'receiving unit', or a'transmitting/receiving unit'. In addition, in the following description, transmission and reception performed through a wireless channel is used in a sense including the processing as described above by the communication unit 510.

The storage unit 520 stores data such as a basic program, an application program, and setting information for the operation of the terminal. The storage unit 520 may include a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. Further, the storage unit 520 provides stored data according to the request of the control unit 530.

The controller 530 controls overall operations of the terminal. For example, the control unit 530 transmits and receives signals through the communication unit 510. Also, the control unit 530 writes and reads data in the storage unit 520. In addition, the controller 530 may perform functions of a protocol stack required by a communication standard. To this end, the controller 530 may include at least one processor or a micro processor, or may be a part of a processor. In addition, a part of the communication unit 510 and the control unit 530 may be referred to as a communication processor (CP). According to various embodiments, the controller 530 may control the terminal to perform operations according to various embodiments to be described later.

6 is a flowchart illustrating a use of mapping information of quality of service in a wireless communication system according to an embodiment of the present disclosure. 6 illustrates a method of operating an apparatus using mapping information of quality of service. For example, the device may be a base station (eg, eNB 120 or gNB 210) or a UE (eg, UE 110a, 110b, 110c, 110d, 200a or 200b).

Referring to FIG. 6, in step 601, the device acquires mapping information of quality of service between different systems. The quality-of-service mapping information includes information indicating that the interchange between parameters representing the quality of service required for communication in the first system and the second system is allowed, and the service quality required for communication in the first system and the second system. It may include at least one of information indicating a correspondence relationship between the indicated parameters and information indicating a switching rule between parameters indicating a quality of service required for communication in the first system and the second system. For example, one of the first system and the second system may be a system based on the LTE standard as shown in FIG. 1, and the other may be a system based on the NR standard as shown in FIG. 2. Quality of service mapping information is obtained through a unique procedure for providing mapping information, or a procedure for other purposes (e.g., a procedure for registering with a network, a procedure for accessing a network, or a procedure for updating a tracking area (TA)) It can be obtained through

In step 603, the device performs an operation related to direct communication using the mapping information. For example, the device may convert a quality of service parameter of a first system into a quality of service parameter of a second system using the mapping information. The converted quality of service parameter can be used for various operations related to direct communication. For example, the converted quality of service parameter may be used for resource allocation, resource request, service availability determination, and the like.

As in the embodiment described with reference to FIG. 6, the device may obtain mapping information of quality of service between the first system and the second system. In this regard, the device may transmit capability information indicating that direct communication-related operations based on the quality of service mapping information can be performed to the network. In other words, providing mapping information to the device even though mapping information is not available causes unnecessary signaling overhead, so the device can inform the network of the necessity of mapping information by sending capability information to report that the mapping information can be used. have.

As in the embodiment described with reference to FIG. 6, the device may convert the quality of service parameter of the first system into the quality of service parameter of the second system.

According to an embodiment, when the device is a base station, the device receives a message requesting allocation of resources for direct communication from the terminal, and sets the quality of service parameter of the first system included in the message to the quality of service parameter of the second system. Can be switched to. For example, the device may select a system suitable for direct communication based on link conditions of the first system and the second system, and may switch the quality of service parameter to allocate resources according to the selection.

According to another embodiment, when the device is a UE, the device may convert the quality of service parameter of the first system generated by the application into the quality of service parameter of the second system. As an example, when a system other than a system corresponding to a quality of service parameter provided by an application wants to directly perform communication, the device may switch a quality of service parameter generated by the application. As another example, when a system used to provide services of each application is defined, but the service quality parameter provided by the application does not correspond to the defined system, the device may switch the service quality parameter generated by the application. have.

7 is a flowchart for providing mapping information of quality of service in a wireless communication system according to an embodiment of the present disclosure. 7 illustrates a method of operating an apparatus for providing mapping information of quality of service. For example, the device is a core network object (e.g. HSS 135, MME 125, V2X CF 140, S/P-GW 130, UDR 230, PCF 240, or AMF 215) or a base station (e.g., eNB 120 or gNB 210) Can be

Referring to FIG. 7, in step 701, the device generates a message including mapping information of quality of service between different systems. The quality-of-service mapping information includes information indicating that the interchange between parameters representing the quality of service required for communication in the first system and the second system is allowed, and the service quality required for communication in the first system and the second system. It may include at least one of information indicating a correspondence relationship between the indicated parameters and information indicating a switching rule between parameters indicating a quality of service required for communication in the first system and the second system. For example, one of the first system and the second system may be a system based on the LTE standard as shown in FIG. 1, and the other may be a system based on the NR standard as shown in FIG. 2. The message including the mapping information of the quality of service may be generated by a request of another device or may be generated by the determination of the device.

In step 703, the device transmits a message including mapping information of the quality of service. The message containing the mapping information of the quality of service may be transmitted through a unique procedure for providing mapping information, or a procedure for other purposes (e.g., a procedure for registering with a network, a procedure for accessing a network, or a TA (tracking area)). It can be transmitted through an update procedure).

Hereinafter, the present disclosure describes specific examples of provision, acquisition, and use of mapping information of quality of service parameters between different systems. In the following description, messages with specific names are mentioned, but this is for convenience of description and does not limit the present invention.

8A is a diagram illustrating a procedure for a base station to obtain service policy/parameter information from a network of a first communication system during an initial registration process in a wireless communication system according to an embodiment of the present disclosure. The procedure illustrated in FIG. 8A is a procedure in which the UE 110a registers with the network, and the registration procedure may be referred to as a network attachment. During network attach, a default EPS bearer is created, so that always-on IP connectivity is possible.

According to FIG. 8A, in step 801, the UE 110a may transmit an initial attach request message to the eNB 120. The UE 110a may transmit the attach request message to the eNB 120 using a radio resource control (RRC) connection setup complete message.

In step 803, the eNB 120 may transmit an initial attach request message to the MME 125 to be accessed. The eNB 120 may transmit the attach request message using an initial UE message which is an S1-MME control message. The initial attach request message may include UE capability information supported by UE 110a. The UE capability information may include at least one of a V2X capability indicator, an LTE PC5 capability, and an NR PC5 capability. The initial attach request message may be delivered to the MME 125 by being included in an S1 application protocol (S1AP) initial UE message. The eNB 120 can deliver an initial UE message including V2X support capability information of the eNB 120, for example, V2X support, cross-RAT PC5 control capability information to the MME 125 have. According to another embodiment, a tracking area update (TAU) message may be used instead of the initial attach request message.

In step 805, the MME 125 may transmit a message for requesting subscription information of UE 110a (eg, a UE subscription request message) to HSS 135. In step 807, HSS 135 may reply to the MME 125 a response message (eg, a UE subscription response message) including subscription information of the terminal. The subscription information of UE 110a may include at least one of the items shown in <Table 1>. According to an embodiment of the present disclosure, the HSS 135 may store V2X service policy and parameter information for direct communication (eg, ProSe) shown in Table 2. The subscription information that HSS 135 returns to the MME 125 may include at least some of the V2X service policy and parameter information for direct communication (eg, ProSe) shown in Table 2.

Thereafter, in step 809, the MME 125 may transmit an S1AP initial context setup request message including an attach accept message or a TAU accept message to the eNB 120. The MME 125 may determine information included in the initial context configuration request message and provided to the eNB 120 based on the UE capability and eNB capability information received in step 803.

According to an embodiment, when the terminal capability includes a V2X capability indicator (capability indication), and the eNB capability includes V2X support (support), the initial context setting request message is a V2X service authorized indication (eg : It may include at least one of a) of Table 1 and an aggregated maximum bit rate (UE-PC5-AMBR) for LTE PC5 (eg, b of Table 1).

According to another embodiment, if the terminal capability includes a V2X capability indicator (capability indication) and NR PC5 capability (capability), and the eNB capability includes V2X support (support) and cross-RAT PC5 control, initial context setting request The message is a V2X service authentication indicator (service authorized indication) (e.g., a in Table 1), UE-PC5-AMBR for LTE PC5 (e.g., b in Table 1), and UE-PC5-AMBR for NR PC5 (e.g.: <Table 1> c), cross-RAT PC5 control authorization (e.g., <Table 1> e), V2X service policy and parameter information for direct communication (eg ProSe) (eg: It may include at least one of at least one of the items in Table 2).

In step 811, the eNB 120 transmits a radio resource control (RRC) connection reconfiguration (RRC) message including an attach accept message to the UE 110a. Next, although not shown in FIG. 8A, UE 110a transmits an RRC connection reconfiguration complete message to eNB 120, and eNB 120 transmits an initial context setup response message to the new MME 125. send. Thereafter, in step 813, the UE 110a transmits a direct transfer message including an attach complete message to the eNB 120. In step 815, the eNB 120 delivers an attach complete message to the new MME 125.

8B is a diagram illustrating a procedure for a terminal to obtain service policy and parameter information from a network of a first communication system in a wireless communication system according to an embodiment of the present disclosure. 8B illustrates a procedure for a terminal to obtain V2X service policy and parameter information. According to the procedure shown in FIG. 8B, after completing registration to the network through the procedure shown in FIG. 8A, the UE 110a establishes a PDN connection with V2X CF 140 through the eNB 120 and S/P-GW 130, and , V2X service policy and parameter information can be obtained from V2X CF 140.

Referring to FIG. 8B, in step 817, the HSS 135 may receive subscription information related to V2X and service policy/parameter information from V2X CF 140. In step 819, the UE 110a may transmit a V2X policy provisioning request (V2X policy provisioning request) message to the V2X CF 140. The V2X policy provisioning request message may include UE capability (eg, LTE PC5 capability, NR PC5 capability, etc.). In step 821, the V2X CF 140 receiving the V2X policy provisioning request message may return a V2X policy provisioning response (V2x policy provisioning response) message. The V2X policy provisioning response message may include at least some of the V2X service policy and parameter information shown in <Table 2> and <Table 3>.

In the embodiment described with reference to FIG. 8B, HSS 135 and V2X CF 140 may exchange terminal subscription information and service policy/parameter information related to V2X in step 817. 8A and 8B, step 817 is performed after the UE 110a registers with the network. However, according to another embodiment, step 817 may be performed before the network registration of UE 110a, that is, before step 801. In addition, when there is a change in terminal subscription information and service policy/parameter information related to V2X, HSS 135 or V2X CF 140 may update the information by triggering step 817.

9A to 9C illustrate a procedure for a terminal to obtain service policy/parameter information (eg, V2X service policy parameters shown in Table 1) from a network according to an embodiment of the present disclosure. .

9A illustrates a procedure for a terminal and a base station to obtain service policy/parameter information from a network of a second communication system during an initial registration process in a wireless communication system according to an embodiment of the present disclosure. 9A illustrates signaling between UE 110a, gNB 210, AMF 215, PCF 240, UDM 235, and UDR 230. Here, the gNB 210 may be referred to as'AN (access network)' or'RAN'.

Referring to FIG. 9A, in step 901, UDM 235 may transmit subscription information of UE 110a to PCF 240. For example, when the subscription information of UE 110a stored in UDM 235 is updated, the UDM 235 may provide the updated subscription information. In step 903, the UDR 230 may transmit policy related information (eg, V2X service parameter) to the PCF 240. For example, when policy-related information stored in UDR 230 is updated, UDR 230 may provide the updated policy-related information. In FIG. 9A, steps 901 and 903 are shown to be performed prior to subsequent steps. However, according to another embodiment, at least one of steps 901 and 903 may be omitted or may be performed at different times. That is, steps 901 and 903 may be performed independently from the registration procedure of UE 110a.

In step 905, the UE 110a may transmit a registration request message to the gNB 210. In step 907, the gNB 210 may transmit a registration request message to the AMF 215. AMF 215 receiving a registration request message from UE 110a through gNB 210, in step 909, requests terminal subscription information for UE 110a from UDM 235 through signaling with UDM 235, and receives subscription information from UDM 235. Can be obtained. In step 911, the AMF 215 may request policy information related to the UE 110a from the PCF 240 through signaling with the PCF 240, and obtain the policy information.

In step 905, UE 110a includes capability information (UE capability) and/or UE policy container (eg, V2X policy) information supported by UE 110a in a registration request message to provide capability information and/or UE policy container Information can be transmitted to the gNB 210. The gNB 210 may deliver the registration request message received from UE 110a to the AMF 215. At this time, when UE 110a supports V2X service, information indicating that UE 110a supports V2X service may be provided to AMF 215 by being included in UE capability information (eg, V2X capability indicator). In addition, information indicating that the UE 110a supports PC5 communication may be provided to the AMF 215 by being included in the UE LTE PC5 capability and UE NR PC5 capability information.

The registration request message transmitted in step 907 may be delivered to the AMF 215 by being included in the next generation application protocol (NGAP) initial UE message transmitted by the gNB 210 to the AMF 215. The gNB 210 may include gNB 210 support capability information, for example, V2X support, and cross-RAT PC5 control in an initial UE message.

In step 909, the AMF 215 may request subscription information of UE 105a from the UDM 235, and the UDM 235 may transmit a message requesting subscription information to the UDR 230. The message for requesting subscription information of UE 110a includes identification information indicating UE 110a (e.g., SUPI (subscriber permanent identifier) of UE 110a, globally unique temporary identifier (5G-GUTI), international mobile subscriber identity (IMSI), etc.)) can do. UDR 230 may return a DM query response message including subscription information of UE 110a to UDM 235. Upon receiving the terminal subscription information, the UDM 235 may return a UE subscription response message to the AMF 215. The UE subscription response message is the terminal subscription information for the V2X service shown in Table 1 (e.g., V2X service authentication information of UE 110a, V2X capability of UE 110a, PC5 LTE capability of UE 110a, UE It may include at least one of PC5 NR capability of 110a, cross-RAT PC5 control authentication information of UE 110a, etc.).

According to an embodiment, when the AMF 215 determines that the UE 110a supports the V2X service based on the UE capability information received from the UE 110a, the AMF 215 may select the PCF 240 supporting the V2X service. In addition, in step 911, the AMF 215 may request policy information related to UE 110a from the selected PCF 240. The message transmitted in step 911 may include UE policy container (eg, V2X policy) information received from UE 110a by AMF 215.

The PCF 240 may obtain a V2X service parameter to be applied to the UE 110a from UDR 230 using one of various methods. For example, in step 903, if the V2X service parameter needs to be updated, the UDR 230 may provide the V2X service parameter to the PCF 240. As another example, during operation 911, PCF 240 may request and obtain a V2X service parameter from UDR 230. According to an embodiment, the V2X service parameters provided by UDR 230 to PCF 240 may include V2X service policy and parameter information shown in <Table 2> and <Table 3>.

Meanwhile, the PCF 240 may receive subscriber information of UE 110a and information on functions or capabilities supported by UE 110a in step 911. That is, the AMF 215 may provide UE capability information and/or UE subscription information obtained from UDM 235 to the PCF 240 in step 911.

In step 911, the PCF 240 provides policy information to be applied to the UE 110a to the AMF 215, at this time, a parameter for the V2X service obtained from the UDR 230 may be included in the policy information. When PCF 240 transmits parameter policy information for V2X service to AMF 215, PCF 240 may configure a policy container according to the following method.

According to an embodiment, the PCF 240 may include policy/parameter information related to LTE PC5 among V2X service policies and parameters for direct communication (eg, ProSe) in <Table 2> in one policy container. have. In addition, PCF 240 may include policy/parameter information related to NR PC5 among V2X service policies and parameters for direct communication (eg, ProSe) in Table 2 in one policy container. In addition, the PCF 240 may include V2X service policy and parameter information for network communication (eg, Uu communication) of <Table 3> in one policy container. The PCF 240 may designate a policy section ID indicating V2X service policy and parameter information as a V2X policy and include it in a policy container. The PCF 240 may notify that the corresponding policy information is a policy for V2X, and that V2X service policy and parameter information are included through the policy section ID.

In steps 913 and 915, the AMF 215 may deliver a registration accept message including parameter information for the V2X service obtained from the PCF 240 to the UE 110a through the gNB 210. At this time, the AMF 215 is provided to the gNB 210 using a registration approval message included in the NGAP initial context setup message based on the UE capability and RAN capability information received in step 907. Information to be provided to UE 110a, including the information to be performed and the registration approval message, may be determined.

According to an embodiment, when the terminal capability includes a V2X capability indicator and NR PC5 capability, and the gNB capability includes V2X support, the registration approval message transmitted in step 913 is V2X Service authorized indication (eg, <Table 1> a), UE-PC5-AMBR for NR PC5 (eg: <Table 1> c), UE 110a is a PLMN list that can use PC5 communication ( Example: <Table 1> d), cross-RAT PC5 control authorization (e.g. <Table 1> e), <Table 2> V2X service policy and parameters for direct communication (e.g. ProSe) It may include at least one of policy containers including policy/parameter information related to the NR PC5.

According to an embodiment, when the terminal capability includes a V2X capability indicator, LTE PC5 capability, NR PC5 capability, and gNB capability includes V2X support and cross-RAT PC5 control, registration approval transmitted in step 913 The message is a V2X service authorized indication (e.g., <Table 1> a), UE-PC5-AMBR for LTE PC5 (e.g., <Table 1> b), UE-PC5-AMBR for NR PC5 ( Example: <Table 1> c), a list of PLMNs in which UE 110a can use PC5 communication (e.g., d of <Table 1>), cross-RAT PC5 control authorization (e.g.: <Table 1>) e), a policy container including policy/parameter information related to LTE PC5 among V2X service policies and parameters for direct communication (e.g., ProSe) in <Table 2>, and direct communication (e.g.: ProSe) may include at least one of a policy container including policy/parameter information related to NR PC5 among V2X service policies and parameters.

Alternatively, in steps 917 and 919, the AMF 215 may transmit parameter information for the V2X service received from the PCF 240 to the UE 110a through a separate procedure. The parameter information for providing the V2X service included in the registration approval message transmitted in steps 913 and 915 or the terminal policy delivery message transmitted in steps 917 and 919 is at least one of the service policy/parameter information described in the present disclosure. It may include. At this time, in steps 917 and 919, the parameter information for the V2X service included in the AMF 215 is a NGAP downlink non-access stratum (NAS) transport message and a NAS message for providing policy information to the terminal. It may be determined in a manner similar to steps 913 and 915. In step 917, the AMF 215 may deliver a NGAP UE context modification request message to the gNB 210. The NGAP UE context modification request message is a message used to change the context information of the terminal set in the gNB 210, and the gNB 210 stores parameter information for the V2X service received through the NGAP UE context modification request message in the context of the terminal. And apply. In response to this, the gNB 210 transmits a UE context modification response message to the AMF 215 to notify that the context of the UE is changed and applied according to the received information.

9B is a diagram illustrating a procedure for a terminal to obtain service policy/parameter information from a network in response to a network request from a second communication system in a wireless communication system according to an embodiment of the present disclosure. 9B is an example of another procedure for obtaining service policy/parameter information (eg, V2X service policy parameters shown in Table 1) by UE 110a. According to the embodiment of FIG. 9B, UE 110a may obtain terminal policy related information using a UE configuration update procedure.

Referring to FIG. 9B, in step 923, the PCF 240 may determine to update the terminal policy. As described above, the PCF 240 receives and stores updated service policy/parameter information (eg, V2X service policy parameters shown in Table 1) of the terminal from UDR 230 as in step 903 of FIG. 9A. Can be doing. At this time, the PCF 240 determines whether or not the terminal policy needs to be updated during the initial registration procedure of the UE 110a (eg, the procedure of FIG. 9A), or triggers that the network needs to update the terminal policy after initial registration. It can be judged by what has been done. For example, during the initial registration procedure, the PCF 240 receives UE policy container (eg, V2X policy) information from AMF 215, access selection of the terminal, and policy information related to PDU selection (eg: It may be included in the Npcf_UEPolicyControl_Create request), it is possible to determine whether a terminal policy update is required. Or, when the location of the UE 110a is changed or the subscription information of the UE 110a, for example, a slice service to which the UE 110a is subscribed (subscribed S-NSSAI (single-Network Slice Selection Assistance Information)) is changed, etc. , PCF 240 may determine whether or not the terminal policy needs to be changed. In addition, as described in the section related to step 911 of FIG. 9A, the PCF 240 transmits service policy/parameter information (eg, V2X service policy parameters shown in Table 1) received from UDR 230 to the UE. You may decide to forward it to 110a.

In step 925, the PCF 240 may transmit service policy/parameter information (eg, V2X service policy parameters shown in Table 1) to the AMF 215. At this time, when the V2X service policy parameters shown in <Table 1> are transmitted as the service policy/parameter information, the service policy/parameter information is the V2X service shown in <Table 1>. It may include at least some of the policy parameters. According to an embodiment, service policy/parameter information (eg, V2X service policy parameter shown in Table 1) may be transmitted to AMF 215 by being included in the Namf_Communication_N1N2MessageTransfer message. The Namf_Communication_N1N2MessageTransfer message may include SUPI, UE policy container, and the like.

In step 927, when the UE 110a is registered in the network and can receive service, the AMF 215 may determine to transmit the terminal policy received from the PCF 240 to the UE 110a. If, if the UE 110a is registered in any one of 3GPP and non-3GPP access (access), AMF 215 may deliver the terminal policy to the UE 110a through the connection (access) UE 110a is registered. And, if UE 110a is registered for both 3GPP and non-3GPP access and can be connected, AMF 215 selects a specific access according to AMF 215 internal policy (local policy), and UE 110a You can pass the terminal policy to the user. If the UE 110a is not registered in either 3GPP or non-3GPP access or is in a state in which it cannot be connected, in step 935, a specific message indicating that the AMF 215 has failed to transmit the terminal policy to the PCF 240 (Example: Namf_Communication_N1N2TransferFailureNotification). If the AMF 215 determines that the UE 110a will transmit the terminal policy through 3GPP access, if the UE 110a is in the CM-IDLE state, the AMF 215 transmits a paging message to the UE 110a to request a network trigger-based service ( network triggered service request). Upon receiving the paging request message, UE 110a may perform a paging procedure.

In steps 929 and 931, the AMF 215 may deliver the UE policy to UE 110a. In this case, when the terminal policy includes a V2X service, the terminal policy may include at least one of the V2X service policy parameters shown in <Table 1>. In this case, the AMF 215 transmits a NAS message (eg, a Downlink NAS message or a MANAGE UE POLICY COMMAND message) for providing a policy to the terminal in order to transmit the parameter. To this end, the AMF 215 may include a NAS message in an NGAP downlink NAS transport or NGAP UE context modification request message transmitted to the gNB 210. In steps 929 and 931, parameter information for the V2X service provided by the AMF 215 may be determined in a manner similar to steps 913 and 915. If the AMF 215 delivers the NGAP UE context modification request message to the gNB 210, the gNB 210 stores parameter information for the V2X service received through the NGAP UE context modification request message in the context of the terminal, and , Apply. The gNB 210 transmits a UE context modification response message to the AMF 215 as a response thereto, thereby indicating that the context of the UE has been changed and applied according to the received information.

In step 933, the UE 110a receiving information on the terminal policy may store the obtained information and transmit a reply message informing that the information is received to the AMF 215. In step 935, the AMF 215 may inform the PCF 240 that service policy/parameter information (eg, V2X service policy parameter illustrated in Table 1) has been transmitted to the UE 110a. In this case, the message transmitted in step 935 may be a Namf_N1MessageNotify message. In addition, the PCF 240 can maintain the terminal policy and can inform the UDR 230 of the updated terminal policy.

9C is a diagram illustrating a procedure for a terminal to obtain service policy/parameter information from a network of a second communication system by a terminal request in a wireless communication system according to an embodiment of the present disclosure. 9C is an example of another procedure for obtaining service policy/parameter information (eg, V2X service policy parameters shown in Table 1) by UE 110a. According to the embodiment of FIG. 9C, the UE 110a may acquire the terminal policy by triggering acquisition of the terminal policy.

Referring to FIG. 9C, in step 937, UE 110a may transmit a message requesting terminal policy to AMF 215. In this case, the message for requesting the terminal policy may be a UE policy provisioning request message, and may include a UE policy container (eg, V2X policy).

In step 939, the AMF 215 may transmit a message requesting terminal policy information to the PCF 240. The message requesting the terminal policy information may be an Npcf_UEPolicyControl_Update request, and may include a UE policy container (eg, a V2X policy) received from the terminal.

In step 941, the PCF 240 receiving the message requesting the terminal policy information may determine whether the terminal policy update is required. Subsequent steps 941, 943, 945, 947, 949, 951, and 953 may be performed similarly to the operations described with reference to FIG. 9B. For example, PCF 240, in step 943, transmits information on the terminal policy to the AMF 215, AMF 215, in steps 945, 947, and 949, determines and delivers the terminal policy to UE 110a. I can. And, in response to the terminal policy, in step 951, the UE 110a transmits a response message to the AMF 215, and in step 953, the AMF 215 may transmit a message indicating whether the terminal policy transmission is successful to the PCF 240.

The procedure for obtaining the service parameter/policy described with reference to FIGS. 9A, 9B, and 9C may be equally applied to other terminals (eg, UE 110b, UE 110c, UE 110d, UE 200a, and UE 200b).

10 illustrates a procedure for requesting and obtaining a radio resource for direct communication from a network object of a second communication system by a terminal in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 10, in step 1001, the base station 210 may obtain V2X service subscription information, policy and parameter information from the AMF 215. For example, the base station 210 may obtain V2X service subscription information, policy and parameter information as in step 913 of FIG. 9A, step 917 of FIG. 9A, or step 929 of FIG. 9B.

In step 1003, UE 110a may determine to transmit data using LTE PC5. In step 1005, the UE 110a may transmit a sidelink (SL) resource request message for requesting LTE PC5 resources to the base station 210. The SL resource request message is the PPPP (and/or PPPR) requested by the data to be transmitted by the UE 110a, the destination address of the data to be transmitted by the UE 110a (e.g., Destination Layer-2 ID), and data to be transmitted by the UE 110a. It may include at least one of a PQI requested by a user and a QoS flow identifier (QFI) indicating a PQI.

According to the request of UE 110a, the base station 210 determines radio resources to be allocated to UE 110a. In order to determine the radio resources to be allocated to UE 110a, the base station 210 may use QoS mapping information (eg,'the mapping of PPPP and 5QI (5G QoS indicator)' and/or'the mapping of PPPR and 5QI'). . For example, when receiving a PQI from UE 110a in step 1005, the base station 210 converts the PQI received from UE 110a to a PPPP (and/or PPPR) value using QoS mapping information, and assigns it to UE 110a. It is possible to determine the radio resource to be used. Alternatively, when receiving PPPP (and/or PPPR) from UE 110a in step 1005, the base station 210 converts the PPPP (and/or PPPR) received from UE 110a to a PQI value using QoS mapping information, and sends the Radio resources to be allocated can be determined. Here, the QoS mapping information may be obtained from the AMF 215 according to step 913 of FIG. 9A, step 917 of FIG. 9A, and step 929 of FIG. 9B. Alternatively, QoS mapping information is preset in the base station 210 (pre-configuration), and the base station 210 may use the preset information.

In step 1007, the base station 210 may transmit an SL resource response message including radio resource information allocated to UE 110a. Here, the radio resource may include at least one of a resource exclusively allocated to UE 110a or a resource competitively used with another UE. In step 1009, UE 110a may transmit data. The UE 110a may transmit data by using at least a portion of radio resources allocated by the base station 210.

In the embodiment described with reference to FIG. 10, UE 110a determines to use LTE PC5. According to another embodiment, NR PC5, not LTE PC5, may be used. In this case, each step of FIG. 10 includes the following operations.

In step 1003, UE 110a may determine to transmit data using NR PC5. Subsequently, in step 1005, the UE 110a may transmit an SL resource request message for requesting NR PC5 resources to the base station 210. The SL resource request message is the PPPP (and/or PPPR) requested by the data to be transmitted by the UE 110a, the destination address of the data to be transmitted by the UE 110a (e.g., Destination Layer-2 ID), and the data to be transmitted by UE 110a. At least one of PQI and QFI indicating PQI may be included.

According to the request of UE 110a, the base station 210 determines radio resources to be allocated to UE 110a. In order to determine the radio resources to be allocated to UE 110a, the base station 210 may use QoS mapping information (eg,'the mapping of PPPP and 5QI' and/or'the mapping of PPPR and 5QI'). For example, when receiving a PQI from UE 110a in step 1005, the base station 210 converts the PQI received from UE 110a into a PPPP (and/or PPPR) value using QoS mapping information, and radio resources to be allocated to UE 110a Can be determined. Alternatively, when receiving PPPP (and/or PPPR) from UE 110a in step 1005, the base station 210 converts the PPPP (and/or PPPR) received from UE 110a to a PQI value using QoS mapping information, and sends the Radio resources to be allocated can be determined. Here, the QoS mapping information may be obtained from the AMF 215 according to step 913 of FIG. 9A, step 917 of FIG. 9A, and step 929 of FIG. 9B. Alternatively, QoS mapping information is preset in the base station 210 (pre-configuration), and the base station 210 may use the preset information.

In step 1007, the base station 210 may transmit an SL resource response message to the UE 110a. The SL resource response message may include information on radio resources allocated to UE 110a. Here, the radio resource may include at least one of a resource exclusively allocated to UE 110a or a resource competitively used with another UE. In step 1009, UE 110a may transmit data. The UE 110a may transmit data by using at least a portion of radio resources allocated by the base station 210.

In the embodiment described with reference to FIG. 10, the UE 110a may request a resource for direct communication from the base station 210. At this time, UE 110a may selectively request one of LTE PC5 resources or NR PC5 resources. Here, the LTE PC5 resource request and the NR PC5 resource request may be classified according to one of various methods.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be distinguished by being performed by different messages. For example, when UE 110a requests a PC5 resource from the base station 210, in order to distinguish between the LTE PC5 resource request and the NR PC5 resource request, the UE 110a may use different SL resource request messages. Accordingly, the base station 210 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the type of the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified by an indicator in the message. For example, the same SL resource request message is used, but the UE 110a may include an indicator indicating one of LTE PC5 to NR PC5 in the SL resource request message. Accordingly, the base station 210 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the value of the indicator included in the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified using a value of a destination address (eg, Destination Layer-2 ID) included in a message. For example, values for indicating the destination address may be divided into a first range corresponding to an LTE PC5 resource and a second range corresponding to an NR PC5 resource. Specifically, while using one SL resource request message, the UE 110a may distinguish between a Destination Layer-2 ID indicating LTE PC5 and a Destination Layer-2 ID indicating NR PC5 using different values. Accordingly, the base station 210 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the value of the destination address included in the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified based on the type of request parameter included in the message. For example, a message requesting LTE PC5 resources may include a parameter used for LTE-based direct communication, and a message requesting 5G PC5 resource may include a parameter used for 5G-based direct communication. Specifically, when requesting LTE PC5 resources, UE 110a may include only PPPP (and/or PPPR) requested by data in the SL resource request message, and exclude 5QI required by data. Similarly, in the case of requesting NR PC5 resources, UE 110a may include only 5QI requested by data in the SL resource request message, and may exclude PPPP (and/or PPPR) requested by data. Accordingly, the base station 210 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the types of QoS-related parameters included in the SL resource request message.

11 illustrates a procedure for requesting and acquiring a radio resource for direct communication from a network object of a first communication system by a terminal in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 11, in step 1101, the base station 120 may obtain V2X service subscription information, policy and parameter information from the MME 125. For example, the base station 210 may acquire V2X service subscription information, policy, and parameter information as in step 809 of FIG. 8A.

In step 1103, UE 110a may determine to transmit data using LTE PC5. In step 1105, UE 110a may transmit an SL resource request message for requesting LTE PC5 resources to base station 120. The SL resource request message is the PPPP (and/or PPPR) requested by the data to be transmitted by the UE 110a, the destination address of the data to be transmitted by the UE 110a (e.g., Destination Layer-2 ID), and the data to be transmitted by UE 110a. It may include at least one of PQI and QFI indicating PQI.

According to the request of UE 110a, the base station 120 determines radio resources to be allocated to UE 110a. In order to determine the radio resources to be allocated to UE 110a, the base station 120 may use QoS mapping information (eg,'the mapping of PPPP and 5QI' and/or'the mapping of PPPR and 5QI'). For example, when receiving a PQI from UE 110a in step 1105, the base station 120 converts the PQI received from UE 110a to a PPPP (and/or PPPR) value using QoS mapping information, and radio resources to be allocated to UE 110a. Can be determined. Alternatively, when receiving PPPP (and/or PPPR) from UE 110a in step 1105, the base station 120 converts the PPPP (and/or PPPR) received from UE 110a to a PQI value using the mapping information, and assigns it to UE 110a. It is possible to determine the radio resource to be used. Here, the QoS mapping information may be obtained from the MME 125 according to step 809 of FIG. 8A. Alternatively, QoS mapping information is preset in the base station 120 (pre-configuration), and the base station 210 may use the preset information.

In step 1107, the base station 120 may transmit an SL resource response message. The SL resource response message may include information on radio resources allocated to UE 110a. Here, the radio resource may include at least one of a resource exclusively allocated to UE 110a or a resource competitively used with another UE. In step 1109, UE 110a may transmit data. The UE 110a may transmit data by using at least part of the radio resources allocated from the base station 120.

In the embodiment described with reference to FIG. 11, UE 110a determines to use LTE PC5. According to another embodiment, NR PC5, not LTE PC5, may be used. In this case, each step of FIG. 10 includes the following operations.

In step 1103, UE 110a may determine to transmit data using NR PC5. Subsequently, in step 1105, the UE 110a may transmit an SL resource request message for requesting the NR PC5 resource to the base station 120. The SL resource request message is the PPPP (and/or PPPR) requested by the data to be transmitted by the UE 110a, the destination address of the data to be transmitted by the UE 110a (e.g., Destination Layer-2 ID), and data to be transmitted by the UE 110a. It may include at least one of PQI and QFI indicating PQI.

According to the request of UE 110a, the base station 120 determines radio resources to be allocated to UE 110a. In order to determine the radio resources to be allocated to UE 110a, the base station 120 may use QoS mapping information (eg,'the mapping of PPPP and 5QI' and/or'the mapping of PPPR and 5QI'). For example, when receiving a PQI from UE 110a in step 1105, the base station 120 converts the PQI received from UE 110a to a PPPP (and/or PPPR) value using QoS mapping information, and radio resources to be allocated to UE 110a. Can be determined. Alternatively, when PPPP (and/or PPPR) is received from UE 110a in step 1105, the PPPP (and/or PPPR) received from UE 110a is converted into a PQI value using QoS mapping information stored in base station 120, and UE 110a It is possible to determine the radio resources to be allocated to. Here, the QoS mapping information may be obtained from the MME 125 according to step 809 of FIG. 8A. Alternatively, QoS mapping information is preset in the base station 120 (pre-configuration), and the base station 210 may use the preset information.

In step 1107, the base station 120 may transmit an SL resource response message. The SL resource response message may include information on radio resources allocated to UE 110a. Here, the radio resource may include at least one of a resource exclusively allocated to UE 110a or a resource competitively used with another UE. In step 1109, UE 110a may transmit data. The UE 110a may transmit data by using at least part of the radio resources allocated from the base station 120.

In the embodiment described with reference to FIG. 11, UE 110a may request a resource for direct communication from the base station 120. At this time, UE 110a may selectively request one of LTE PC5 resources or NR PC5 resources. Here, the LTE PC5 resource request and the NR PC5 resource request may be classified according to one of various methods.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be distinguished by being performed by different messages. For example, in the UE 110a requesting the base station 120 for PC5 resources, in order to distinguish between the LTE PC5 resource request and the NR PC5 resource request, the UE 110a may use different SL resource request messages. Accordingly, the base station 120 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the type of the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified by an indicator in the message. For example, the same SL resource request message is used, but the UE 110a may include an indicator indicating one of LTE PC5 to NR PC5 in the SL resource request message. Accordingly, the base station 120 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the value of the indicator included in the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified using a value of a destination address (eg, Destination Layer-2 ID) included in a message. For example, values for indicating the destination address may be divided into a first range corresponding to an LTE PC5 resource and a second range corresponding to an NR PC5 resource. Specifically, while using one SL resource request message, the UE 110a may distinguish between a Destination Layer-2 ID indicating LTE PC5 and a Destination Layer-2 ID indicating NR PC5 using different values. Accordingly, the base station 120 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the value of the destination address included in the SL resource request message.

According to an embodiment, the LTE PC5 resource request and the NR PC5 resource request may be classified based on the type of request parameter included in the message. For example, a message requesting LTE PC5 resources may include a parameter used for LTE-based direct communication, and a message requesting 5G PC5 resource may include a parameter used for 5G-based direct communication. Specifically, when requesting LTE PC5 resources, UE 110a may include only PPPP (and/or PPPR) requested by data in the SL resource request message, and exclude 5QI required by data. Similarly, in the case of requesting NR PC5 resources, UE 110a may include only 5QI requested by data in the SL resource request message, and may exclude PPPP (and/or PPPR) requested by data. Accordingly, the base station 120 may determine whether the requested resource is an LTE PC5 resource or an NR PC5 resource by checking the types of QoS-related parameters included in the SL resource request message.

12 illustrates a procedure for establishing a connection between a base station and a second communication system in a wireless communication system according to an embodiment of the present disclosure. 12 illustrates signaling between gNB 210 and AMF 215. gNB 210 may be referred to as NG-RAN.

Referring to FIG. 12, in step 1201, the gNB 210 transmits an NG setup request message to the AMF 215. The NG configuration request message may include information on V2X capabilities. In step 1203, the AMF 215 transmits an NG setup response message to the gNB 210. That is, the gNB 210 and the AMF 215 may exchange information used between the two and perform an N2 setup procedure to set connection information. The N2 configuration procedure may be performed without relation to the UE.

According to the N2 setup procedure, the gNB 210 and the AMF 215 may obtain information necessary for interconnection and obtain information on capabilities supported by each entity. According to an embodiment, when performing the NG setup procedure with the AMF 215, the gNB 210 may inform the AMF 215 of whether its own V2X support and cross-RAT PC5 control capabilities are present. Here, the cross-RAT PC5 control capability may mean the ability of the gNB 210 to support both LTE PC5 and NR PC5 for V2X PC5 communication. In addition, the cross-RAT PC5 control capability may mean the ability of the gNB 210 to set information for NR PC5 in LTE RAT and provide it to the terminal, or set information for LTE PC5 in NR RAT and provide it to the terminal. have. The information on the capability may be delivered to the AMF 215 by being included in the message transmitted in step 1201 in the form of information such as radio capability of the gNB 210 or V2X capability of the gNB 210. The AMF 215 may complete the NG setup procedure by transmitting a message to the gNB 210 in step 1203.

13 illustrates a procedure for establishing a connection between a base station and a first communication system in a wireless communication system according to an embodiment of the present disclosure. 13 illustrates signaling between eNB 120 and MME 125. The eNB 120 may be referred to as E-UTRAN.

Referring to FIG. 13, in step 1301, the eNB 120 transmits an S1 setup request message to the MME 125. The S1 configuration request message may include information on V2X capabilities. In step 1303, the MME 125 transmits an S1 setup response message to the eNB 120. The eNB 120 and the MME 125 may exchange information used between the two and perform an S1 configuration procedure to configure connection information. The S1 configuration procedure may be performed without relation to the UE.

According to the S1 configuration procedure, the eNB 120 and the MME 125 may obtain information necessary for interconnection, and also obtain information on functions supported by each entity. According to an embodiment, when performing the S1 configuration procedure with the MME 125, the eNB 120 may inform the MME 125 whether it supports its own V2X, and also has its own cross-RAT PC5 control capability. Here, the cross-RAT PC5 control capability may mean the capability of the eNB 120 to support both LTE PC5 and NR PC5 for the V2X PC5 function. In addition, the cross-RAT PC5 control capability may mean the ability of the eNB 120 to set information for NR PC5 in LTE RAT and provide it to the UE, or set information for LTE PC5 in NR RAT and provide it to the UE. have. The information on the capability may be delivered to the MME 125 by being included in a message transmitted in step 1301 in the form of information such as radio capability of the eNB 120 or V2X capability of the eNB 120. The MME 125 may complete the NG setup procedure by sending a message to the eNB 120 in step 1303.

A terminal according to various embodiments of the present disclosure may acquire function information supported by a network. Hereinafter, a procedure for the UE to check a function supported by the network (eg, a cross-RAT PC5 control function) through signaling from the base station is described through FIGS. 14A to 14B.

14A illustrates a procedure for a terminal to obtain system information from a network in a wireless communication system according to an embodiment of the present disclosure. 14 illustrates signaling between a terminal 110a and a base station. In FIG. 14A, the base station exemplifies the eNB 120. The eNB 120 may be referred to as E-UTRAN.

Referring to FIG. 14A, the terminal 110a accessing the EPC network in step 1401 may receive system information from the base station (eNB) 120. The system information in step 1401 may include functions supported by the base station 120. Functions supported by the base station 120 may include cross-radio access technology (RAT) PC5 control capability information. The system information in step 1401 may include PC5 resource information. The PC5 resource information may include LTE PC5 resource pool to NR PC5 resource pool information.

Upon receiving the system information of step 1401 from the base station 120, the terminal 110a may perform the PC5 operation based on at least one of the function information supported by the base station 120 and the PC5 resource pool information included in the system information. For example, if the base station 120 supports the cross-RAT PC5 control function, the terminal 110a may transmit an LTE PC5 to NR PC5 resource request message to the base station 120. When the NR PC5 resource pool information is included in the system information, the terminal 110a may store the NR PC5 resource pool information received from the base station 120 and use it for NR PC5 communication. Or, for example, if the base station 120 does not support the cross-RAT PC5 control function, the terminal 110a may transmit an LTE PC5 resource request message to the base station 120, and may not transmit an NR PC5 resource request message.

If the base station 120 does not support the cross-RAT PC5 control function, the base station 120 sends an indication indicating that the cross-RAT PC5 control function does not support a message of step 1401 (ie, system information, SI ) Message). Alternatively, the base station 120 may not include cross-RAT PC5 control function related information in the message of step 1401. The terminal 110a may identify that the cross-RAT PC5 control function related information is not included in the message of step 1401. Terminal 110a may determine that the base station 120 does not support the cross-RAT PC5 control function based on the identification.

According to another embodiment, a message of step 811 (eg, RRC connection reconfiguration/Initial Attach Response) may be used instead of the message of step 1401 (System Information).

14B is a diagram illustrating another procedure for a terminal to acquire system information from a network in a wireless communication system according to an embodiment of the present disclosure. 14 illustrates signaling between a terminal 110a and a base station. In FIG. 14B, the base station exemplifies the gNB 210. gNB 210 may be referred to as NG-RAN.

Referring to FIG. 14B, the terminal 110a accessing the 5G network in step 1451 may receive system information from the base station gNB 210. The system information in step 1451 may include functions supported by the base station 210. Functions supported by the base station 210 may include cross-radio access technology (RAT) PC5 control capability information. The system information in step 1401 may include PC5 resource information. The PC5 resource information may include LTE PC5 resource pool to NR PC5 resource pool information.

Upon receiving the system information of step 1451 from the base station 210, the terminal 110a may perform a PC5 operation based on at least one of function information supported by the base station 210 and PC5 resource pool information included in the system information. For example, if the base station 210 supports the cross-RAT PC5 control function, the terminal 110a may transmit an LTE PC5 to NR PC5 resource request message to the base station 210. When the system information includes LTE PC5 resource pool information, the terminal 110a may store the LTE PC5 resource pool information received from the base station 210 and use it for LTE PC5 communication. Or, for example, if the base station 210 does not support the cross-RAT PC5 control function, the terminal 110a may transmit an NR PC5 resource request message to the base station 210, and may not transmit an LTE PC5 resource request message.

If the base station 210 does not support the cross-RAT PC5 control function, the base station 210 sends an indication indicating that the cross-RAT PC5 control function does not support a message of step 1451 (ie, system information, SI ) Message). Alternatively, the base station 210 may not include cross-RAT PC5 control function related information in the message of step 1451. The terminal 110a may identify that the cross-RAT PC5 control function related information is not included in the message of step 1451. Terminal 110a may determine that the base station 210 does not support the cross-RAT PC5 control function based on the identification.

According to another embodiment, the message of step 915 (Registration Accept) message may be used instead of the message of step 1451 (System Information). The message (Registration Accept) of step 915 may be included in the RRC connection reconfiguration message and transmitted.

A terminal according to various embodiments of the present disclosure may acquire function information supported by a network. Terminal 110a may register with a 5G system (eg, 5GC) based on the procedure shown in FIG. 9A.

The terminal 110a may transmit a registration request message to the AMF 215 through the base station 210 in steps 905 and 907 of FIG. 9. The registration request message may include the capability information of the terminal in the form of 5GS Mobility Management (5GMM) capability to S1 UE network capability. For example, the capability information of the terminal may be PC5 Capability for V2X (eg, LTE PC5 only, NR PC5 only, both LTE and NR PC5). Also, for example, the capability information of the terminal may be a cross-RAT PC5 capability.

Upon receiving the registration request message in step 907, the AMF 215 may obtain terminal subscription information from the UDM 235 in step 909. The terminal subscription information may include at least one or more of "V2X services authorized" indication, UE-PC5-AMBR per PC5 RAT, and cross-RAT PC5 control authorization.

According to another embodiment, the AMF 215 may obtain policy information (eg, V2X policy information, PC5 policy information, etc.) from the PCF 240 in step 911. The policy information may include at least one or more of "V2X services authorized" indication, UE-PC5-AMBR per PC5 RAT, and cross-RAT PC5 control authorization.

AMF 215 determines the information to be included in the registration acceptance message based on at least one of a registration request message received from the terminal 110a, terminal subscription information received from the UDM 235, and policy information received from the PCF 240. I can. For example, if terminal 110a supports NR PC5 function or supports cross-RAT PC5 capability, and cross-RAT PC5 authorization information is included in terminal subscription information or policy information, AMF 215 is the terminal It may be decided to provide 110a with a cross-RAT PC5 scheduling function. The Registration Accept message may include information indicating that cross-RAT PC5 scheduling is possible (eg, “cross-RAT PC5 control authorized” indicator). The AMF 215 may transmit a registration acceptance message to the base station 210 and the terminal 110a in steps 913 and 915. The AMF 215 may transmit a registration acceptance message including information indicating that cross-RAT PC5 scheduling is possible to the base station 210. The AMF 215 may transmit a registration acceptance message including information indicating that cross-RAT PC5 scheduling is possible to the terminal 110a through the base station 210.

The base station 210 receiving the registration acceptance message from the AMF 215 has been authenticated so that the terminal 110a can use the cross-RAT PC5 scheduling function based on the information included in the registration accept message. can confirm.

Terminal 110a, which has received a Registration Accept message from AMF 215, has been authenticated so that terminal 110a can use the cross-RAT PC5 scheduling function based on the information included in the Registration Accept message. can confirm.

In some embodiments, the terminal 110a certified by the AMF 215 that cross-RAT PC5 scheduling is possible may operate in-coverage in the case of NR PC5 and LTE PC5. Accordingly, the LTE PC5 resource pool information received from the base station 210 in step 1401 of FIG. 14 may be stored and used for LTE PC5 communication.

In addition, in some embodiments, the terminal authenticated by the AMF 215 that cross-RAT PC5 scheduling is possible may perform the procedure of FIG. 10. In step 1003, the terminal 110a may decide to transmit the resource to the LTE PC5. In step 1005, the terminal 110a may transmit an LTE PC5 resource request message to the base station 210 (eg, gNB). The base station 210 may determine that the terminal 110a is a terminal authenticated to make an LTE PC5 resource request based on information received from the AMF 215 in step 1001 (e.g., information indicating that cross-RAT PC5 scheduling is possible). have. Accordingly, the base station 210 may allocate LTE PC5 resources to the terminal 110a in step 1007. Terminal 110a, which has been allocated LTE PC5 resources from base station 210, may transmit data to LTE PC5 in step 1009.

In addition, in some embodiments, a terminal that has not been certified that cross-RAT PC5 scheduling is possible from AMF215 may operate as in-coverage in the case of NR PC5 and out-of-coverage in the case of LTE PC5. have.

In addition, in some embodiments, a terminal that is not authenticated that cross-RAT PC5 scheduling is possible from the AMF 215 may not perform the procedure of FIG. 10 in the case of LTE PC5 communication.

In addition, in some embodiments, a terminal that is not authenticated that cross-RAT PC5 scheduling is possible from the AMF 215 may perform the procedure of FIG. 10. In step 1003, the terminal 110a may decide to transmit the resource to the LTE PC5. In step 1005, the terminal 110a may transmit an LTE PC5 resource request message to the base station 210. Base station 210, based on information received from AMF 215 in step 1001 (eg, information indicating that cross-RAT PC5 scheduling is possible), determines that the terminal 110a is an unauthenticated terminal to request LTE PC5 resources I can. Accordingly, the base station 210 may not allocate the LTE PC5 resource to the terminal 110a in step 1007. Terminal 110a, which has not been allocated LTE PC5 resources from the base station 210, may transmit data to the LTE PC5 in an out-of-coverage mode in step 1009.

A terminal according to various embodiments of the present disclosure may acquire function information supported by a network. Terminal 110a may register in the EPC system by performing the procedure shown in FIG. 8A.

The terminal 110a may transmit an Initial Attach Request message to the MME 125 through the base station 120 (eg, eNB) in steps 801 and 803 of FIG. 8. The Initial Attach Request message may include UE capability information in the form of UE network capability. For example, the capability (capability) information of the terminal, PC5 Capability for V2X (e.g., LTE PC5 only, NR PC5 only, both LTE and NR PC5), cross-RAT PC5 capability, etc. I can.

Upon receiving the Initial Attach request message in step 803, the MME 125 may obtain terminal subscription information from HSS 135 in step 805. The terminal subscription information may include at least one or more of "V2X services authorized" indication, UE-PC5-AMBR per PC5 RAT, and cross-RAT PC5 control authorization.

The MME 125 may determine information to be included in the Initial context setup request / Initial Attach response message based on at least one of the Initial Attach Request message received from the terminal 110a and the terminal subscription information received from the HSS 135. For example, if the terminal 110a supports NR PC5 function or cross-RAT PC5 capability, and the terminal subscription information includes cross-RAT PC5 authorization information, the MME 125 crosses the terminal 110a It can be decided to provide (cross)-RAT PC5 scheduling function. The MME 125 may include information indicating that cross-RAT PC5 scheduling is possible (eg, “cross-RAT PC5 control authorized” indicator) in the Initial context setup request/Initial Attach response message. The MME 125 may transmit an Initial context setup request / Initial Attach response message to the base station 120 and the terminal 110a in steps 809 to 811. The MME 125 may transmit an Initial context setup request / Initial Attach response message to the base station 120 in step 809. The MME 125 may transmit an Initial context setup request / Initial Attach response message to the terminal 110a through the base station 120 in step 809.

Base station 120 receiving the initial context setup request message from the MME 125 confirms that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the initial context setup request message. I can.

Terminal 110a receiving the Initial Attach response message from the MME 125 can confirm that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the Initial Attach response message.

In addition, in some embodiments, a terminal certified by the MME that cross-RAT PC5 scheduling is possible may operate in-coverage in the case of NR PC5 and LTE PC5. Accordingly, the NR PC5 resource pool information received from the base station 120 in step 1401 of FIG. 14 can be stored and used for NR PC5 communication.

In addition, in some embodiments, a terminal that has been authenticated by the MME that cross-RAT PC5 scheduling is possible may perform the procedure of FIG. 11. In step 1103, the terminal 110a may decide to transmit the resource to the NR PC5. In step 1105, the terminal 110a may transmit an NR PC5 resource request message to the base station 120. The base station 120 is based on the information received from the MME 125 in step 1101 (e.g., information indicating that cross-RAT PC5 scheduling is possible), that the terminal 110a is the terminal authenticated to make an NR PC5 resource request. You can decide. Accordingly, the base station 120 may allocate the NR PC5 resource to the terminal 110a in step 1107. Terminal 110a, which has been allocated the NR PC5 resource from the base station 120, may transmit data to the NR PC5 in step 1109.

In addition, in some embodiments, a terminal that has not been authenticated by the MME that cross-RAT PC5 scheduling is possible may operate as in-coverage in the case of LTE PC5 and out-of-coverage in the case of NR PC5. have.

In addition, in some embodiments, a terminal that has not been authenticated by the MME that cross-RAT PC5 scheduling is possible may not perform the procedure of FIG. 11 in the case of NR PC5 communication.

In addition, in some embodiments, a terminal that is not authenticated that cross-RAT PC5 scheduling is possible from the MME 125 may perform the procedure of FIG. 11. In step 1103, the terminal 110a may decide to transmit the resource to the NR PC5. In step 1105, the terminal 110a may transmit an NR PC5 resource request message to the base station 120. Base station 120 determines that terminal 110a is an unauthenticated terminal so that terminal 110a can request NR PC5 resources based on information received from MME 125 in step 1101 (eg, information indicating that cross-RAT PC5 scheduling is possible). I can. Accordingly, the base station 120 may not allocate the NR PC5 resource to the terminal 110a in step 1107. The terminal 110a that has not been allocated the NR PC5 resource from the base station 120 may transmit data to the NR PC5 in an out-of-coverage mode in step 1109.

3 illustrates an interworking structure of a 5G system and an EPC system according to various embodiments of the present disclosure. The AMF 215 and MME 125 can be connected through the N26 interface.

Terminal 110a according to various embodiments of the present disclosure may be registered in a 5G system (eg, 5GC) and connected to the AMF 215. AMF 215 is the terminal capability (capability) information received from the terminal in step 907 of Figure 9a (e.g., PC5 Capability for V2X (LTE PC5 only, NR PC5 only, both LTE and NR PC5), cross-RAT PC5 capability Including at least one of) can be stored. The AMF 215 may store terminal capability information as a terminal context (UE context). The AMF 215 may store terminal subscription information or policy information received from UDM 235 to PCF 240 in steps 909 to 911 of FIG. 9A. The AMF 215 may store terminal subscription information or policy information as a terminal context (UE context). The terminal subscription information or policy information is PC5 authentication information (whether the UE is authorized to perform V2X communication over PC5 reference point as Vehicle UE, Pedestrian UE, or both, including for LTE PC5 and for NR PC5), V2X service authentication indicator ("V2X services authorized" indication), PC5 RAT-specific UE-PC5-AMBR (UE-PC5-AMBR per PC5 RAT), cross-RAT PC5 control authorization, PLMN list (the list of the PLMNs where the UE is authorized to perform V2X communication over PC5 reference point). For each PLMN in the list, the RAT(s) over which the UE is authorized to perform V2X communications over PC5 reference point, at least one of PC5 QoS parameters may be included.

According to various embodiments of the present disclosure, the terminal 110a registered in the 5G system and connected to the AMF 215 may move to the EPC system (eg, handover, idle mode mobility, connected mode mobility, etc.). Accordingly, the AMF 215 may transmit the terminal context stored in the AMF 215 to the MME 125 through the N26 interface. The terminal context may include terminal capability information, terminal subscription information, policy information, and the like. The MME 125 may store and use the terminal context received from the AMF 215.

For example, the terminal context may include information indicating that the terminal 110a can use the LTE PC5 function and the NR PC5 function, and that the terminal 110a is a terminal that has received cross-RAT PC5 control authentication. Based on the UE context, the MME 125 may determine to provide the UE 110a with a cross-RAT PC5 scheduling function.

The AMF 215 may determine terminal context information to be transmitted to the MME 125. For example, the AMF 215 may check whether the PLMN ID of MME 125 is included in the PLMN list of the terminal context. If the PLMN list includes the PLMN ID of the MME 125, the AMF 215 may include the PLMN list in the terminal context information transmitted to the MME 125. If the PLMN list does not include the PLMN ID of MME 125, the AMF 215 may not include the PLMN list in the terminal context information transmitted to the MME 125.

In order to transmit the terminal context to the MME 125, the AMF 215 may convert the terminal context of the 5G format into the terminal context of the EPS format. For example, the terminal context converted to the EPS format may be referred to as mapped EPS UE Contexts to mapped EPS UE Contexts for V2X. The AMF 215 may transmit the terminal context converted to the EPS format to the MME 125 through the N26 interface. The terminal context converted to the EPS format may be included in a message such as a Relocation request, Relocation Complete Notification, and Context Response and transmitted to the MME 125.

MME 125 is information indicating that cross-RAT PC5 scheduling is possible in a message (eg, Initial context setup request, Handover Request, etc.) transmitted to the base station 120 to which the terminal 110a is connected (eg, "cross-RAT PC5 control authorized" indicator). The base station 120 receiving the message from the MME 125 may confirm that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the message.

The MME 125 may include information indicating that cross-RAT PC5 scheduling is possible (eg, a "cross-RAT PC5 control authorized" indicator) in a message (eg, TAU Accept, etc.) transmitted to the terminal 110a. Upon receiving the message from the MME 125, the terminal 110a can confirm that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the message.

Terminal 110a according to various embodiments of the present disclosure may be registered in the EPC system and connected to the MME 125. MME 125 is the terminal capability (capability) information received from the terminal in step 803 of Figure 8a (e.g., PC5 Capability for V2X (LTE PC5 only, NR PC5 only, both LTE and NR PC5), cross-RAT PC5 capability ) Can be saved. The MME may store the UE capability information as a UE context. The MME 125 may store the terminal subscription information received from the HSS 135 in step 807 of FIG. 8A. The MME 125 may store terminal subscription information as a terminal context (UE context). The terminal subscription information is PC5 authentication information (whether the UE is authorized to perform V2X communication over PC5 reference point as Vehicle UE, Pedestrian UE, or both, including for LTE PC5 and for NR PC5), V2X service authentication indicator ("V2X services authorized" indication), PC5 RAT-specific UE-PC5-AMBR (UE-PC5-AMBR per PC5 RAT, including UE-PC5-AMBR for LTE PC5 and UE-PC5-AMBR for NR PC5), cross-RAT PC5 control authorization, PLMN list (the list of the PLMNs where the UE is authorized to perform V2X communication over PC5 reference point). For each PLMN in the list, the RAT(s) over which the UE is authorized to perform V2X communications over PC5 reference point, PC5 QoS parameters may include at least one or more information.

According to various embodiments of the present disclosure, the terminal 110a registered in the EPC system and connected to the MME 125 may move to the 5G system (eg, handover, idle mode mobility, connected mode mobility, etc.). Accordingly, the MME 125 may transmit the terminal context stored in the MME 125 to the AMF 215 through the N26 interface. The terminal context may include terminal capability information, terminal subscription information, policy information, and the like.

The MME 125 may determine terminal context information to be transmitted to the AMF 215. For example, the MME 125 may check whether the PLMN ID of AMF 215 is included in the PLMN list of the terminal context. If the PLMN list includes the PLMN ID of AMF 215, the MME 125 may include the PLMN list in the terminal context information transmitted to the AMF 215. If the PLMN list does not include the PLMN ID of the AMF 215, the MME 125 may not include the PLMN list in the terminal context information transmitted to the AMF 215.

The MME 125 may transmit the terminal context in the EPS format to the AMF 215 through the N26 interface. The terminal context in the EPS format may be included in a message such as a Forward Relocation request, Forward Relocation Complete Notification Ack, and Context Response and transmitted to the AMF 215.

The AMF 215 may store and use the terminal context received from the MME 125. For example, the AMF 215 may convert the terminal context of the EPS format received from the MME 125 into the terminal context of the 5G format. The terminal context may include information indicating that the terminal 110a can use the LTE PC5 function and the NR PC5 function, and that the terminal 110a has received cross-RAT PC5 control authentication. Based on the terminal context, the AMF 215 may determine to provide a cross-RAT PC5 scheduling function to the terminal 110a.

AMF 215 is information indicating that cross-RAT PC5 scheduling is possible in a message (eg, Initial context setup request, Handover Request, etc.) transmitted to the base station 210 connected to the terminal 110a (eg, "cross-RAT PC5 control authorized" Indicator). The base station 210 receiving the message from the AMF 215 can confirm that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the message.

The AMF 215 may include information indicating that cross-RAT PC5 scheduling is possible in a message (eg, registration acceptance, etc.) transmitted to the terminal 110a (eg, “cross-RAT PC5 control authorized” indicator). Terminal 110a receiving the message from the AMF 125 may confirm that the terminal 110a has been authenticated to use the cross-RAT PC5 scheduling function based on the information included in the message.

Various embodiments of the present disclosure are related to the cross-RAT PC5 control capability of the terminal. The UE capability information of the UE may include information (eg, information element (IE)) for indicating whether or not the cross-RAT PC5 control capability is supported. The cross-RAT PC5 control capability may mean the capability that the eNB 120 can set information for NR PC5 in LTE RAT and provide it to the UE, or set information for LTE PC5 in NR RAT and provide it to the UE. The policy information transmitted by the policy-related entity (eg PCF 240) to the authentication management entity (eg AMF 215) is “V2X services authorized” indication, UE-PC5-AMBR per PC5 RAT, cross-RAT PC5 control It may include at least one or more information of authorization.

In various embodiments of the present disclosure, a message (eg, a registration accept message) between a terminal, a base station (eg, eNB 120 or gNB 120), and a core network entity (eg, AMF 215) is cross- Information indicating that RAT PC5 scheduling is possible (eg, “cross-RAT PC5 control authorized” indicator) may be included. The UE may perform LTE PC5 communication in an in-coverage mode or an out-of-coverage mode, depending on whether it has been authenticated by the AMF that cross-RAT PC5 scheduling is possible. In addition, the UE may perform NR PC5 communication in an in-coverage mode or an out-of-coverage mode, depending on whether it has been authenticated by the MME that cross-RAT PC5 scheduling is possible.

In some embodiments, the base station may determine whether the terminal is authenticated that cross-RAT PC5 scheduling is possible based on the information obtained from the AMF. The base station may determine whether to allocate resources for LTE PC5 communication to the terminal based on the determination. If the terminal is not authenticated by the AMF that cross-RAT PC5 scheduling is possible, the base station may not allocate resources for LTE PC5 communication to the terminal. The terminal may perform LTE PC5 communication in out-of-coverage mode. When the terminal is authenticated by the AMF that cross-RAT PC5 scheduling is possible, the base station may allocate resources for LTE PC5 communication to the terminal. The terminal may perform LTE PC5 communication in the in-coverage mode.

In addition, in some embodiments, the base station may determine whether the terminal is authenticated for cross-RAT PC5 scheduling based on information obtained from the MME. The base station may determine whether to allocate resources for NR PC5 communication to the terminal based on the determination. If the terminal is not authenticated by the MME that cross-RAT PC5 scheduling is possible, the base station may not allocate resources for NR PC5 communication to the terminal. The terminal may perform NR PC5 communication in out-of-coverage mode. When the terminal is authenticated by the MME that cross-RAT PC5 scheduling is possible, the base station may allocate resources for LTE NR communication to the terminal. The terminal may perform NR PC5 communication in the in-coverage mode.

The methods according to the embodiments described in the claims or the specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in a computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device). The one or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.

These programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM. (electrically erasable programmable read only memory, EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs (DVDs) or other forms of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all of them. In addition, a plurality of configuration memories may be included.

In addition, the program is through a communication network composed of a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), or a storage area network (SAN), or a combination thereof. It may be stored in an attachable storage device that can be accessed. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may access a device performing an embodiment of the present disclosure.

In the above-described specific embodiments of the present disclosure, components included in the disclosure are expressed in the singular or plural according to the presented specific embodiments. However, the singular or plural expression is selected appropriately for the situation presented for convenience of explanation, and the present disclosure is not limited to the singular or plural constituent elements, and even constituent elements expressed in plural are composed of the singular or Even the expressed constituent elements may be composed of pluralities.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure is limited to the described embodiments and should not be determined, and should be determined by the scope of the claims as well as the equivalents of the claims to be described later.

Claims (16)

In the method of operating a base station in a wireless communication system,
A process of acquiring information on the mapping of quality of service related to direct communication between the first system and the second system,
And performing switching between the quality of service of the first system and the quality of service of the second system by using the information on the mapping.
The method according to claim 1,
The process of obtaining the information on the mapping,
A process of transmitting a first message for registration of a terminal to an upper network object, and
Receiving a second message as a response to the first message; and
And obtaining information on the mapping from the second message.
The method according to claim 1,
A process of receiving a first message requesting a resource for direct communication from a terminal, and
Further comprising the step of transmitting a second message notifying the result of the allocation of the resource,
The second message is generated based on information on the mapping and a quality of service parameter related to the direct communication included in the first message.
The method according to claim 1,
The process of transmitting a first message for establishing a connection with a network to an upper network object, and
Further comprising the process of receiving a second message in response to the first message from the higher level network object,
The first message includes capability information of the base station related to the mapping of the quality of service.
The method of claim 4,
The capability information includes information indicating the presence or absence of a cross-radio access technology (RAT) PC5 control capability.
In the method of operating a terminal in a wireless communication system,
A process of acquiring information on the mapping of quality of service related to direct communication between the first system and the second system,
And performing switching between the quality of service of the first system and the quality of service of the second system by using the information on the mapping.
The method of claim 6,
A process of transmitting a first message requesting a resource for direct communication to a base station, and
Further comprising the process of receiving a second message notifying the result of the allocation of the resource,
The first message includes a quality of service parameter of the first system or the second system.
The method of claim 7,
The first message is whether a resource requested based on at least one of a message type, an indicator, a destination address value, and the quality of service parameter included in the first message is a resource of a first system or a resource of a second system. How to dictate.
In a base station apparatus in a wireless communication system,
At least one transmitting and receiving unit,
And at least one processor connected to the at least one transceiver,
The at least one processor,
Obtaining information on the mapping of quality of service related to direct communication between the first system and the second system,
An apparatus for controlling to perform switching between the quality of service of the first system and the quality of service of the second system by using the mapping information.
The method of claim 9,
The at least one processor,
Transmit a first message for registration of the terminal to the upper network object,
Receiving a second message as a response to the first message,
An apparatus for controlling to obtain information on the mapping from the second message.
The method of claim 9,
The at least one processor,
Receiving a first message requesting a resource for direct communication from the terminal,
Control to transmit a second message notifying the result of allocation of the resource,
The second message is generated based on information on the mapping and a quality of service parameter related to the direct communication included in the first message.
The method of claim 9,
The at least one processor,
Sends the first message to establish a connection with the network to the upper network object,
Controls to receive a second message that is a response to the first message from the upper network object,
The first message includes capability information of the base station related to the mapping of the quality of service.
The method of claim 12,
The capability information includes information indicating the presence or absence of a cross-radio access technology (RAT) PC5 control capability.
In a terminal device in a wireless communication system,
A transmitting and receiving unit,
Includes at least one processor connected to the transceiver,
The at least one processor,
Obtaining information on the mapping of quality of service related to direct communication between the first system and the second system,
An apparatus for controlling to perform switching between the quality of service of the first system and the quality of service of the second system by using the mapping information.
The method of claim 14,
The at least one processor,
Send a first message requesting resources for direct communication to the base station, and
Control to receive a second message notifying the result of allocation of the resource,
The first message includes a quality of service parameter of the first system or the second system.
The method of claim 15,
The first message is whether a resource requested based on at least one of a message type, an indicator, a destination address value, and the quality of service parameter included in the first message is a resource of a first system or a resource of a second system. Pointing device.

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