1. A base station apparatus (130, 220) used in a cellular communication network, the base station apparatus (130, 220) comprising: at least one wireless transceiver (1001); and a processor (1004) configured to: transmit (401) Vehicle-to-Everything, V2X, support information to a first radio terminal (100, 120) via the at least one wireless transceiver (1001), the V2X support information indicating that a V2X Service is supported by a serving network (410) including the base station apparatus (130, 220); and after receiving (402) V2X terminal information transmitted from the first radio terminal (100, 120) that has received the V2X support information, perform resource allocation for the V2X service.

2. The base station apparatus (130, 220) according to Claim 1, wherein the processor (1004) is configured to broadcast the V2X support information in such a way that a plurality of radio terminals including the first radio terminal (100, 120) are able to receive the V2X support information in a cell provided by the base station apparatus (130, 220).

3. The base station apparatus (130, 220) according to Claim 1 or 2, wherein the processor (1004) is configured to transmit the V2X support information on both a first carrier frequency band used for cellular communication and a second carrier frequency band used for the V2X service.

4. The base station apparatus (130, 220) according to any one of Claims 1 to 3, wherein the V2X support information indicates at least one of: the V2X service is available; a carrier frequency band to be used for the V2X service; measurement configuration of the carrier frequency band used for the V2X service; a supported type of the V2X service; and transmission power allowed for the radio terminal for the V2X service.

5. The base station apparatus (130, 220) according to any one of Claims 1 to 4, wherein the V2X support information indicates a radio resource pool to be used for autonomous resource selection for the V2X service by each of a plurality of radio terminals including the first radio terminal (100, 120).

6. The base station apparatus (130, 220) according to Claim 5, wherein the radio resource pool comprises: a radio resource pool per type of V2X service included in the V2X service; a radio resource pool per V2X operation mode of a radio terminal; a radio resource pool per V2X service area; a radio resource pool per device type of a radio terminal; or a radio resource pool per pre-configured category.

7. The base station apparatus (130, 220) according to any one of Claims 1 to 6, wherein the V2X terminal information indicates at least one of: the first radio terminal (100, 120) is interested in the V2X service; the first radio terminal (100, 120) desires to use the V2X service; a frequency band that the first radio terminal (100, 120) supports for the V2X service; a frequency band available to the first radio terminal (100, 120) for the V2X service; a type of V2X service in which the first radio terminal (100, 120) is interested; and a device type of the first radio terminal (100, 120).

8. The base station apparatus (130, 220) according to any one of Claims 1 to 7, wherein the V2X terminal information indicates whether the first radio terminal (100, 120) is a Road Side Unit, RSU (120).

9. The base station apparatus (130, 220) according to any one of Claims 1 to 8, wherein the processor (1004) is configured to transmit, to a target base station, a handover request regarding the first radio terminal (100, 120), and the handover request indicates at least one of: the first radio terminal (100, 120) is interested in the V2X service; the first radio terminal (100, 120) has already been allowed to utilize the V2X service; the first radio terminal (100, 120) has already been authenticated for the V2X service; and the first radio terminal (100, 120) has already been approved for the V2X service.

10. A method in a base station apparatus (130, 220) used in a cellular communication network, the method comprising: transmitting (401), to a first radio terminal (100, 120), Vehicle-to-Everything, V2X, support information indicating that a V2X Service is supported by a serving network (410) including the base station apparatus (130, 220); and after receiving (402) V2X terminal information transmitted from the first radio terminal (100, 120) that has received the V2X support information, performing resource allocation for the V2X service.

11. A radio terminal comprising: at least one wireless transceiver (1101); and a processor (1104) configured to: receive (401) Vehicle-to-Everything, V2X, support information from a serving network (410) via the at least one wireless transceiver (1101), the V2X support information indicating that a V2X Service is supported by the serving network (410); transmit (402) V2X terminal information to the serving network (410) in response to receiving the V2X support information; receive (403) V2X configuration from the serving network (410) after transmitting (402) the V2X terminal information, the V2X configuration indicating resource allocation for the V2X service; and perform V2X communication in accordance with the V2X configuration.

12. A method in a radio terminal, the method comprising: receiving (401), from the serving network (410), Vehicle-to-Everything, V2X, support information indicating that a V2X Service is supported by a serving network (410); transmitting (402) V2X terminal information to the serving network (410) in response to receiving the V2X support information; receiving (403) V2X configuration from the serving network (410) after transmitting (402) the V2X terminal information, the V2X configuration indicating resource allocation for the V2X service; and performing V2X communication in accordance with the V2X configuration.

13. A cellular communication network comprising: one or more base stations (130, 220) configured to transmit (401), to a first radio terminal (100, 120), Vehicle-to-Everything, V2X, support information indicating that a V2X Service is supported by the cellular communication network; and a control entity (150) configured to, after receiving (402) V2X terminal information transmitted from the first radio terminal (100, 120) that has received the V2X support information, perform resource allocation for the V2X service.

14. A method in a cellular communication network, the method comprising: transmitting (401), to a first radio terminal (100, 120), Vehicle-to-Everything, V2X, support information indicating that a V2X Service is supported by the cellular communication network from one or more base stations (130, 220); and after receiving (402), via the one or more base stations (130, 220), V2X terminal information transmitted from the first radio terminal (100, 120) that has received the V2X support information, performing resource allocation for the V2X service.

15. A computer program comprising program code to be executed by a processor, wherein execution of the program code causes the processor to execute a method as mentioned in Claim 10 or 12.

Technical field
[0001]
This disclosure relates to wireless communication systems, especially V2X services.
Background technology
[0002]
Non-Patent Document 1 describes use cases and potential requirements for Long Term Evolution (LTE) -based Vehicle-to-Everything (V2X) services. V2X stands for vehicle-to-Vehicle (V2V) communications, includes Vehicle-to-Infrastructure (V2I) communications, and Vehicle-to-Pedestrian (V2P) communications. V2V communication or V2V service is communication or service between User Equipments (UEs) mounted on the vehicle and using the V2V application. V2I communication or V2I service means communication or service between a UE and a Road Side Unit (RSU), both of which use a V2I application. Unless otherwise noted, V2I communications include Infrastructures-to-Vehicle (I2V) communications. Further, the UE here includes not only the vehicle UE but also the pedestrian UE. An RSU is a roadside entity that supports V2I services, including sending and receiving to and from vehicle UEs using V2I applications. The RSU is implemented in a base station such as LTE (that is, Evolved Node B (eNB)) or a stationary UE (stationary UE). V2P communication or V2P service means communication or service between a vehicle UE and a pedestrian UE, both of which use the V2I application. V2P communication may be performed via RSU and may also be referred to as V2I2P communication or P2I2V communication.
[0003]
Introducing some use cases related to the V2I service described in Non-Patent Document 1. Non-Patent Document 1 describes a configuration in which the vehicle and the RSU both implement the Prose-enabled UE and the vehicle and the RSU perform Proximity-based services (Prose) communication in Section 5.6 V2I Emergency Stop Use Case. .. ProSe communication is an example of device-to-device (D2D) communication and includes direct communication between two or more adjacent ProSe-enabled UEs. In that use case, vehicle A sends a message to the service RSU indicating an event, such as an emergency stop. The service RSU receives the message from the vehicle A and relays the message to surrounding vehicles. All vehicles located within the transmission range of the service RSU can receive the message.
[0004]
In the use case described in Section 5.14 V2X Road safety service via infrastructure of Non-Patent Document 1, RSU C detects that an accident has occurred in an area it manages and causes the accident to occur on a remote server (Traffic). Notify the Safety Server (TSS) or Intelligent Transport Systems (ITS) server) and start transmitting the information into the area. The server informs RSUs near RSU C that an accident has occurred in an area managed by RSU C. Nearby RSUs begin sending V2X messages indicating that an accident has occurred within the area indicated by the RSU C.
Prior art literature
Non-patent literature
[0005]
Non-Patent Document 1: 3GPP S1-151330 “3GPP TR 22.885 V0.2.0 Study on LTE Support for V2X Services (Release 14)”, April 2015
Outline of the invention
Problems to be solved by the invention
[0006]
Non-Patent Document 1 does not show a specific procedure for starting the V2X service. That is, the procedure for provisioning a V2X service for a vehicle UE, a pedestrian UE, or a UE that uses a V2X service such as an RSU having a UE function is not clear.
[0007]
One of the objectives to be achieved by the embodiments disclosed herein is an apparatus, method, and program that contributes to the realization of a procedure for provisioning a V2X service to a wireless terminal that uses the V2X service. Is to provide. It should be noted that this objective is only one of the plurality of objectives that the embodiments disclosed herein seek to achieve. Other objectives or issues and novel features will be apparent from the description or accompanying drawings herein.
Means to solve problems
[0008]
In the first aspect, the base station apparatus includes at least one radio transceiver and at least one processor. The at least one processor transmits V2X support information, indicating that the Vehicle-to-Everything (V2X) service is supported by the serving network including the base station apparatus, via the at least one wireless transceiver. It is configured to transmit the V2X setting to the first wireless terminal in response to the reception of the V2X terminal information transmitted from the first wireless terminal that has received the V2X support information.
[0009]
In the second aspect, the method in the base station appliance is to (a) transmit V2X support information indicating that the Vehicle-to-Everything (V2X) service is supported by the serving network including the base station appliance. And (b) transmitting the V2X setting to the first wireless terminal in response to the reception of the V2X terminal information transmitted from the first wireless terminal that has received the V2X support information.
[0010]
In the third aspect, the wireless terminal includes at least one wireless transceiver and at least one processor. The at least one processor receives V2X support information indicating that the Vehicle-to-Everything (V2X) service is supported by the serving network from the serving network via the at least one wireless transceiver, and the V2X support. In response to receiving information, V2X terminal information indicating interest in the V2X service is transmitted to the serving network, and in response to transmission of the V2X terminal information, V2X settings transmitted from the serving network are received. , It is configured to perform V2X communication according to the above V2X settings.
[0011]
In the fourth aspect, the method in the wireless terminal is (a) to receive V2X support information from the serving network indicating that the Vehicle-to-Everything (V2X) service is supported by the serving network, (b). Sending V2X terminal information indicating interest in the V2X service to the serving network in response to the reception of the V2X support information, and (c) from the serving network in response to the transmission of the V2X terminal information. Includes receiving the transmitted V2X settings and performing V2X communication according to the V2X settings.
[0012]
In a fifth aspect, the cellular communication network includes one or more base stations and control entities. The one or more base stations are configured to transmit V2X support information indicating that the Vehicle-to-Everything (V2X) service is supported by the cellular communication network. In response to receiving the V2X terminal information transmitted from the first wireless terminal that received the V2X support information, the control entity sets the V2X setting via the one or more base stations. It is configured to send to a wireless terminal.
[0013]
In a sixth aspect, the method in the cellular communication network is to (a) transmit V2X support information from the base station indicating that the Vehicle-to-Everything (V2X) service is supported by the cellular communication network. b) In response to receiving the V2X terminal information transmitted from the first wireless terminal that received the V2X support information via the one or more base stations, the V2X setting is set to the one or more base stations. Includes transmitting from the control entity to said first radio terminal via.
[0014]
In the seventh aspect, the program includes an instruction group (software code) for causing the computer to perform the method according to the second or fourth aspect described above when read by the computer.
The invention's effect
[0015]
According to the above aspect, it is possible to provide a device, a method, and a program that contribute to the realization of a procedure for provisioning a V2X service to a wireless terminal that uses the V2X service.
A brief description of the drawing
[0016]
FIG. 1 is a diagram showing a configuration example of a wireless communication system according to an embodiment.
FIG. 2 is a diagram showing a configuration example of a wireless communication system according to an embodiment.
FIG. 3 is a diagram showing an example of architecture / deployments of a wireless communication system according to an embodiment.
FIG. 4 is a sequence diagram showing an example of a provisioning procedure for a V2X service according to an embodiment.
FIG. 5 is a sequence diagram showing an example of a handover procedure according to an embodiment.
FIG. 6 is a diagram showing a first example of message forwarding in a wireless communication system according to an embodiment.
FIG. 7 is a diagram showing a second example of message forwarding in the wireless communication system according to the embodiment.
FIG. 8 is a diagram showing a third example of message forwarding in the wireless communication system according to the embodiment.
FIG. 9 is a diagram showing a fourth example of message forwarding in the wireless communication system according to the embodiment.
FIG. 10 is a block diagram showing a configuration example of an RSU and a base station according to an embodiment.
FIG. 11 is a block diagram showing a configuration example of an RSU and a wireless terminal according to an embodiment.
FIG. 12 is a block diagram showing a configuration example of a server and a V2X controller according to an embodiment.
Embodiment for carrying out the invention
[0017]
In the following, specific embodiments will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are designated by the same reference numerals, and duplicate explanations are omitted as necessary for the sake of clarity of explanation.
[0018]
The embodiments shown below will be described mainly for the Evolved Packet System (EPS) accommodating LTE and SAE (System Architecture Evolution). However, these embodiments are not limited to EPS, but other mobile communication networks or systems such as 3GPP UMTS, 3GPP2 CDMA2000 system (1xRTT, HRPD (High Rate Packet Data)), global system for mobile communications (1xRTT, HRPD (High Rate Packet Data)). It may be applied to GSM®) / General packet radio service (GPRS) systems, WiMAX systems, and the like.
[0019]

FIG. 1 shows a configuration example of a wireless communication system according to some embodiments including the first embodiment. The wireless terminals (UE) 100 to 102 are mounted on the vehicle. Vehicles UE 100 to 102 may be mounted in an in-vehicle processing unit (for example, a car navigation system). Vehicles UE100-102 are V2I sir
Run the V2I application to support the service. UE100-102 may support other V2X services, i.e. V2V services and / or V2P services.
[0020]
RSU120 and 121 are installed on the roadside. In the example of FIG. 1, the RSU 120 is installed near the intersection 110. The RSUs 120 and 121 each implement, but are not limited to, Prose-enabled UEs and may perform ProSe communication with vehicles UEs 100-102 to provide V2I services. The RSUs 120 and 121 may operate as a ProSe UE-to-Network Relay (i.e., Relay UE). ProSe UE-to-Network Relay mainly relays traffic (downlinks and uplinks) between out-of-coverage UEs (remote UEs) and the network. The RSUs 120 and 121 communicate with the base station (eNB) 130 in the cellular communication network via a wireless connection and further communicate with the server 140 (e.g., ITS server or TSS) via the eNB 130.
[0021]
As already explained, Proximity-based services (ProSe) specified in 3GPP Release 12 is an example of D2D communication. D2D communication includes at least one of direct communication and direct discovery. In 3GPP Release 12, the wireless link between UEs used for direct communication or direct discovery is called the PC5 interface or Sidelink. Therefore, ProSe can be said to be a general term for communication (or service) using at least Sidelink. In the example of FIG. 1, a side link may be used for communication between RSU120 and UE100 or 101 operating as a UE or Relay UE, and communication between two or more UEs. Note that in 3GPP Release 12, sidelink transmission uses the same frame structure as the Long Term Evolution (LTE) frame structure defined for uplinks and downlinks, and is a subset of uplink resources in the frequency and time domains. To use. In 3GPP Release 12, UE performs side-link transmission using Single Carrier Frequency Division Multiple Access (SC-FDMA) similar to uplink.
[0022]
The server 140 communicates with UEs 100 to 102 and RSUs 120 and 121 that support the V2X service. More specifically, the server 140 communicates at the application layer (application level) with the V2X application executed in each of the UEs 100 to 102 and the RSUs 120 and 121 via the cellular communication network including the base station 130. In other words, the reference point between UE 100-102 and server 140 may depend on the user plane of the cellular communication network, and the signaling and data between UE 100-102 and server 140 may be on that user plane. It may be transferred by. Similarly, the reference point between the RSUs 120 and 121 and the server 140 may depend on the user plane of the cellular communication network.
[0023]
The server 140 may be an ITS server or a TSS. For example, the server 140 notifies RSUs (eg, RSU121) near RSU120 that an accident has occurred in an area managed by RSU120 in response to receiving report information indicating the occurrence of some accident from RSU120. You may.
[0024]
Further, in some implementations, the UEs 100-102 may communicate with the V2X controller 150 via the base station 130 (and core network) in order to utilize the V2X service provided by the cellular communication network. Further, the RSUs 120 and 121 operating as UEs may also communicate with the V2X controller 150 via the base station 130 (and core network).
[0025]
The V2X controller 150 provides a logical function used for operations related to the cellular communication network (i.e., Public Land Mobile Network (PLMN)) required for V2X services. For example, the V2X controller 150 may authenticate or authorize UEs 100-102 for V2X services. The V2X controller 150 may authenticate or approve the RSUs 120 and 121 acting as UEs. The V2X controller 150 may be referred to as a V2X function entity.
[0026]
The reference point or interface between UE 100-102 (and RSU 120 and 121) and the server 140 may depend on the user plane of the cellular communication network and may depend on UE 100-102 (and RSU 120 and 121) and the server. Signaling and data to and from 140 may be transferred on the user plane.
[0027]
FIG. 2 shows another configuration example of the wireless communication system according to some embodiments including the first embodiment. In the example of FIG. 2, each of the RSU 220 and 221 operates as a base station (eNB).
[0028]
In the configurations of FIGS. 1 and 2, part or all of UEs 100 to 102 may be pedestrian UEs. Further, in the configurations of FIGS. 1 and 2, the server 140 may be colocated within the same site with the eNB 130 or the RSU 220 or 221 operating as an eNB. Such a server is called a Mobile Edge Computing (MEC) server. Instead, the server 140 is located at a remote site geographically distant from the site of the eNB 130 (or RSU220 or 221) and is located in one or more entities (eg, Mobility Management Entity, Packet Data) within the cellular communication network. It may communicate with eNB 130 via Network Gateway (P-GW) and Serving Gateway (S-GW).
[0029]
FIG. 3 is a diagram showing an example of architecture / deployments of a wireless communication system according to some embodiments including the first embodiment. As described with reference to FIGS. 1 and 2, in some implementations RSU120 and 121 have the function of UE and in other implementations RSU220 has the function of eNB. That is, in some implementations, the UE (e.g., UE100) that supports the V2X service can communicate with the server 140 via path 361 through RSU120 and eNB130 acting as UE. Further or instead, in some implementations, the UE (eg, UE100) connects directly to the eNB 130 and communicates with the server 140 without going through the RSU 120, as shown in path 362 of FIG. be able to. Further or instead, in some implementations, the UE (eg, UE100) connects to the RSU220 acting as an eNB and communicates with the server 140 via the RSU220, as shown in path 363 of FIG. be able to.
[0030]
The communication 351 between the RSU 120 and the eNB 130 operating as a UE may use the dedicated carrier frequency band f1 reserved for the V2X service. Alternatively, the communication 351 may use a shared frequency band (Shared spectrum) f2 that is not licensed to any operator or is shared by a plurality of operators. Communication using such a shared frequency is also called Licensed Shared Access (LSA). Alternatively, the communication 351 may use the carrier frequency band f3 licensed by the operator of the cellular communication network. Similar to the communication 351, the communication 352 between the UE 100 and the RSU (UE) 120, the communication 353 between the UE 100 and the eNB 130, and the communication 354 between the UE 100 and the RSU 220 operating as the eNB also have the frequency bands f1 and f2 described above. , And f3 may be used. Further, for communication between UEs (not shown), any of the frequency bands f1, f2, and f3 described above may be used.
[0031]
Next, the procedure for provisioning the V2X service will be explained below. FIG. 4 is a sequence diagram showing a process 400 which is an example of a provisioning procedure. The network 410 includes at least the eNB 130 in the configuration example of FIG. 1 and at least the RSU 220 operating as an eNB in ​​the configuration example of FIG. The network 410 may further include a V2X controller 150.
[0032]
In step 401, the network 410 transmits V2X Support Information indicating that the V2X service is supported by the serving network (cellular communication network) including the eNB 130. V2X support information is transmitted by RSU220 acting as eNB130 or eNB. In addition, V2X support information may be transmitted by an RSU acting as a UE. In this case, the RSU may broadcast or group cast some or all of the V2X support information received from the eNB 130.
[0033]
V2X support information includes (a) availability of V2X service, (b) carrier frequency band used for V2X service, (c) measurement configuration of carrier frequency band used for V2X service, (d). It may indicate at least one of the supported V2X service types (eg, V2V, V2I, V2P) and (e) the transmit power allowed to the wireless terminal for the V2X service. It should be noted that (a) availability of the V2X service may be implied by the transmission of the V2X support information. Further, (b) the network identifier (e.g., PLMN identity list) or area identifier (e.g., V2X area list) to which the V2X service is provided may be transmitted together with the carrier frequency band used for the V2X service.
[0034]
Further or instead, the V2X support information may indicate the radio resource pool used for autonomous resource selection for the V2X service by each UE. The radio resource pool is for each type of one or more V2X services included in the V2X service (eg, V2V, V2I, V2P), for each V2X operating mode (eg, relay mode, direct mode) of the RSU operating as a UE, It may include a radio resource pool per V2X service area, per UE device type (eg, RSU, Vehicle, Pedestrian), or per preset category (eg, speed, (movement) direction, lane). The radio resource pool may be set for each carrier frequency band in which the V2X service is performed.
[0035]
Further or instead, V2X support information May include synchronization settings for V2X.
[0036]
The eNB 130 or RSU (eNB) 220 broadcasts V2X support information within the cell provided by the eNB 130 or RSU (eNB) 220 so that at least multiple UEs in the idle state (eg, RRC_IDLE) can receive V2X support information. You may. The eNB 130 or RSU (eNB) 220 may transmit V2X support information over a Broadcast Control Channel (BCCH) carrying a System Information Block (SIB).
[0037]
The eNB 130 or RSU (eNB) 220 includes a first carrier frequency band used for cellular communication (eg, frequency band f3 licensed by the cellular operator) and a second carrier frequency band used for V2X services (eg, eNB). V2X support information may be transmitted in both individual frequency bands f1) for V2X. In some implementations, if V2X support information is transmitted in both of these two frequency bands, then the information transmitted in one frequency band (eg, frequency band f3 licensed to the cellular operator) is in the other frequency band. It may take precedence over the information transmitted in (individual frequency band f1 for eg, V2X).
[0038]
In some implementations, if the UE 100 is out-of-coverage of the cellular communication network, the UE 100 may use the V2X support information transmitted in the individual frequency band f1 for V2X. For example, the RSU (UE) 120 may receive V2X support information transmitted from the eNB 130 and broadcast or group cast (at least a portion of) the V2X support information in the individual frequency band f1 for the V2X service. , May be transferred (relayed) to UE100. Alternatively, the UE 100 may use pre-stored settings (e.g., preset radio resources for V2X).
[0039]
In step 402 of FIG. 4, the UE 100 or RSU 120 sends V2X terminal information, that is, V2X UE Information, indicating interest in the V2X service to the network 410 in response to receiving V2X support information. ..
[0040]
V2X UE information is that (a) UE100 or RSU120 is interested in V2X service, (b) UE100 or RSU120 wants to use V2X service, (c) UE100 or RSU120 supports for V2X service. Frequency band (d) frequency band available for V2X service by UE100 or RSU120, (e) V2X service type (eg, V2V, V2I, V2P) of interest to UE100 or RSU120, and (f). ) At least one of the device types (eg, RSU, Vehicle, Pedestrian) of UE100 or RSU120 may be indicated.
[0041]
Further or instead, the V2X UE information may include RSU indications. The RSU display indicates whether the source UE is an RSU. Further, the RSU display may include the type of RSU. The type of RSU may indicate the type of road on which the RSU is installed (e.g., up lane, down lane, underpass, overpass, above ground, underground, general road, or highway). The RSU display may be transmitted from the Mobility Management Entity (MME) to the eNB (i.e., eNB 130 or RSU (eNB) 220) using the E-RAB SETUP REQUEST message or the INITIAL CONTEXT SETUP REQUEST message.
[0042]
The V2X UE information may be transmitted in the procedure for establishing a control connection (e.g., Radio Resource Control (RRC) Connection) with the eNB 130 or RSU (eNB) 220. For example, the UE 100 or RSU 120 may transmit V2X UE information using the RRC Connection Setup Complete message or UE capability Signaling in the RRC connection establishment procedure. When the RSU (UE) 120 transmits V2X UE information (eg, RSU display), the eNB 130 is an S1AP INITIAL UE MESSAGE message or E-RAB SETUP RESPONSE message indicating that the message is related to RSU. Information (eg, RSU Indicator) may be sent to the MME.
[0043]
In step 403 of FIG. 4, the network 410 (eg, eNB 130, RSU 220, or V2X controller 150) sends a V2X Configuration to the UE 100 or RSU 120 in response to receiving V2X UE information from the UE 100 or RSU 120. do. For example, V2X configurations may be sent using the RRC Connection Reconfiguration message. The generation of V2X settings based on the V2X UE information transmitted from the UE 100 or RSU 120 may be performed by the eNB 130 or the RSU 220 acting as an eNB, or by the V2X controller 150. The UE 100 or RSU 120 receives the V2X setting transmitted from the network 410, and performs V2X communication according to the V2X setting.
[0044]
The V2X configuration can be set by either the individual carrier frequency band f1 reserved for the V2X service, the shared frequency band f2 for LSA, or the carrier frequency band f3 licensed to the operator of the cellular communication network. It may be transmitted. In addition, V2X settings may be transmitted from RSU120. For example, the RSU (UE) 120 may receive the V2X settings transmitted from the eNB 130 and group cast (at least a portion of) the V2X settings in the individual frequency band f1 for the V2X service or transfer it to the UE 100. (Relay) may be used.
[0045]
In some implementations, the V2X setting may indicate the measurement setting of the carrier frequency band used for the V2X service. In some implementations, V2X settings may include radio resource settings for V2X services. The radio resource settings may include one or both of a Data Radio Bearer (DRB) setting and a Signaling Radio Bearer (SRB) setting. The DRB setting may include at least one of the elements listed below:
-Setting up the Physical Multicast Channel (PMCH) for the Multimedia Broadcast / Multicast Service (MBMS);
-Setting up Physical Downlink Shared Channel (PDSCH) for Single Cell Point to Multi-point (SC-PTM);
-Logical Channel ID (LCID); and
-E-UTRAN Radio Access Bearer (E-RAB) identity.
[0046]
Further or instead, the V2X configuration may indicate the radio resource pool used for voluntary resource selection for V2X services by UE100 or RSU120. The V2X configuration may indicate the allocation of individual radio resources for the V2X service to the UE 100 or RSU 120.
[0047]
For example, network 410 has a V2X configuration that indicates the allocation of radio resources reserved for the RSU in response to receiving V2X UE information from the RSU 120 that includes an RSU indication that the source UE is an RSU. May be sent to the RSU120. Alternatively, the network 410 is reserved for the RSU in response to receiving a notification from the higher-level device (eg, MME) of the network 410 to the lower-level device (eg, eNB) indicating that the target UE is an RSU. V2X settings indicating the allocation of radio resources may be sent to the RSU120. As a result, the network 410 can distinguish the RSU 120 operating as a UE from the normal UE 100, and operates as a UE with a radio resource (eg, frequency) different from the radio resource (eg, frequency) assigned to the normal UE 100. Can be assigned to the RSU 120 to be used.
[0048]
Further or instead, the network 410 may send an RSU Configuration to the RSU 120 indicating how the RSU 120 should behave as an RSU. The RSU configuration may be sent in an RRC Connection Reconfiguration message. In addition, the RSU settings may include at least some of the V2X settings. Furthermore, the RSU configuration should either send the V2X reporting message to the network (eg, eNB) as the RSU120 as a Relay UE, or to the network (eg, eNB) in response to the RSU120 receiving the V2V message as the V2X UE. The RSU120 may be indicated implicitly or explicitly whether the V2X reporting message should be sent. Implicitly, the RSU 120 may determine whether the RSU configuration includes the radio resource configuration information (e.g. Radio Resource Configuration) required to operate as a Relay UE. For example, the RSU 120 may operate as a Relay UE if the radio resource setting information is included, and the RSU 120 may operate as a V2V UE if the radio resource setting information is not included. Further, when explicitly indicated, the RSU setting may indicate the operation mode of the RSU. The operation mode may be, for example, Relay UE mode, V2V UE mode, or the like.
[0049]
Here, the area to which the same V2X configuration is applied may be defined as a V2X service area (SA). The V2X SA may be defined in any of the individual carrier frequency bands f1 reserved for V2X services, the shared frequency band f2 for LSAs, and the carrier frequency band f3 licensed to the operator of the cellular communication network. For example, the cell may be defined in the frequency band f3 and the V2X SA may be defined in the frequency band f1 or f2. The V2X SA may be defined independently of the cell or in association with the cell. In the former case, there may be multiple V2X SAs within a cell, or there may be one V2X SA that spans multiple cells (ie, at least partially covers each of the cells). You may. In the latter case, one V2X SA may be defined by one cell or a combination of multiple cells. In addition, if a UE moves between cells belonging to the same V2X SA (cell reselection or handover is performed), the UE may continue the V2X service uninterrupted, or during cell reselection or handover. Will be interrupted, but may be resumed as soon as this is complete. In other words, V2X SA can be thought of as the "Valid area" of the V2X settings. V2X SA information (e.g., V2X SA Index (ID)) is included in the V2X settings It may be transmitted as one of the information elements (IE), or it may be transmitted by a message or signaling different from the V2X setting. For example, the eNB 130 or RSU (eNB) 220 may transmit V2X settings in frequency band f3, which may contain V2X SA information. In this case, the RSU (UE) 120 may further transmit V2X SA information in the frequency band f1 or f2. The RSU (UE) 120 may broadcast or group cast the V2X SA information, or may transfer (relay) the information to the UE 100.
[0050]
According to the procedure described with reference to FIG. 4, the UE 100 or the RSU 120 operating as a UE can perform the provisioning required to start the V2X service.

WE CLAIM:
1. A base station apparatus (130, 220) used in a cellular communication network, the
base station apparatus (130, 220) comprising:
at least one wireless transceiver (1001); and
a processor (1004) configured to:
transmit (401) Vehicle-to-Everything, V2X, support information to a first
radio terminal (100, 120) via the at least one wireless transceiver (1001), the V2X support
information indicating that a V2X Service is supported by a serving network (410) including
the base station apparatus (130, 220); and
after receiving (402) V2X terminal information transmitted from the first
radio terminal (100, 120) that has received the V2X support information, perform resource
allocation for the V2X service.
2. The base station apparatus (130, 220) according to Claim 1, wherein the processor
(1004) is configured to broadcast the V2X support information in such a way that a plurality
of radio terminals including the first radio terminal (100, 120) are able to receive the V2X
support information in a cell provided by the base station apparatus (130, 220).
3. The base station apparatus (130, 220) according to Claim 1 or 2, wherein the
processor (1004) is configured to transmit the V2X support information on both a first carrier
frequency band used for cellular communication and a second carrier frequency band used for the V2X service.
4. The base station apparatus (130, 220) according to any one of Claims 1 to 3,
wherein the V2X support information indicates at least one of: the V2X service is available; a
carrier frequency band to be used for the V2X service; measurement configuration of the
carrier frequency band used for the V2X service; a supported type of the V2X service; and
transmission power allowed for the radio terminal for the V2X service.
5. The base station apparatus (130, 220) according to any one of Claims 1 to 4,
wherein the V2X support information indicates a radio resource pool to be used for autonomous resource selection for the V2X service by each of a plurality of radio terminals
including the first radio terminal (100, 120).
6. The base station apparatus (130, 220) according to Claim 5, wherein the radio
resource pool comprises: a radio resource pool per type of V2X service included in the V2X
service; a radio resource pool per V2X operation mode of a radio terminal; a radio resource
pool per V2X service area; a radio resource pool per device type of a radio terminal; or a
radio resource pool per pre-configured category.
7. The base station apparatus (130, 220) according to any one of Claims 1 to 6,
wherein the V2X terminal information indicates at least one of: the first radio terminal (100,
120) is interested in the V2X service; the first radio terminal (100, 120) desires to use the
V2X service; a frequency band that the first radio terminal (100, 120) supports for the V2X
service; a frequency band available to the first radio terminal (100, 120) for the V2X service;
a type of V2X service in which the first radio terminal (100, 120) is interested; and a device
type of the first radio terminal (100, 120).
8. The base station apparatus (130, 220) according to any one of Claims 1 to 7,
wherein the V2X terminal information indicates whether the first radio terminal (100, 120) is
a Road Side Unit, RSU (120).
9. The base station apparatus (130, 220) according to any one of Claims 1 to 8,
wherein
the processor (1004) is configured to transmit, to a target base station, a handover
request regarding the first radio terminal (100, 120), and
the handover request indicates at least one of: the first radio terminal (100, 120) is
interested in the V2X service; the first radio terminal (100, 120) has already been allowed to
utilize the V2X service; the first radio terminal (100, 120) has already been authenticated for
the V2X service; and the first radio terminal (100, 120) has already been approved for the
V2X service.
10. A method in a base station apparatus (130, 220) used in a cellular communication
network, the method comprising: transmitting (401), to a first radio terminal (100, 120), Vehicle-to-Everything, V2X,
support information indicating that a V2X Service is supported by a serving network (410)
including the base station apparatus (130, 220); and
after receiving (402) V2X terminal information transmitted from the first radio
terminal (100, 120) that has received the V2X support information, performing resource
allocation for the V2X service.
11. A radio terminal comprising:
at least one wireless transceiver (1101); and
a processor (1104) configured to:
receive (401) Vehicle-to-Everything, V2X, support information from a
serving network (410) via the at least one wireless transceiver (1101), the V2X support
information indicating that a V2X Service is supported by the serving network (410);
transmit (402) V2X terminal information to the serving network (410) in
response to receiving the V2X support information;
receive (403) V2X configuration from the serving network (410) after
transmitting (402) the V2X terminal information, the V2X configuration indicating resource
allocation for the V2X service; and
perform V2X communication in accordance with the V2X configuration.
12. A method in a radio terminal, the method comprising:
receiving (401), from the serving network (410), Vehicle-to-Everything, V2X,
support information indicating that a V2X Service is supported by a serving network (410);
transmitting (402) V2X terminal information to the serving network (410) in
response to receiving the V2X support information;
receiving (403) V2X configuration from the serving network (410) after transmitting
(402) the V2X terminal information, the V2X configuration indicating resource allocation for
the V2X service; and
performing V2X communication in accordance with the V2X configuration.
13. A cellular communication network comprising:
one or more base stations (130, 220) configured to transmit (401), to a first radio
terminal (100, 120), Vehicle-to-Everything, V2X, support information indicating that a V2X
Service is supported by the cellular communication network; and a control entity (150) configured to, after receiving (402) V2X terminal information
transmitted from the first radio terminal (100, 120) that has received the V2X support
information, perform resource allocation for the V2X service.
14. A method in a cellular communication network, the method comprising:
transmitting (401), to a first radio terminal (100, 120), Vehicle-to-Everything, V2X,
support information indicating that a V2X Service is supported by the cellular communication
network from one or more base stations (130, 220); and
after receiving (402), via the one or more base stations (130, 220), V2X terminal
information transmitted from the first radio terminal (100, 120) that has received the V2X
support information, performing resource allocation for the V2X service.
15. A computer program comprising program code to be executed by a processor,
wherein execution of the program code causes the processor to execute a method as
mentioned in Claim 10 or 12.