Patent Description:
V2X communication may be used for providing various kinds of services in relation to vehicles like cars, trucks, busses, trains, ships, aircrafts, motorcycles, bicycles, or the like. V2X communication may for example include: V2V (vehicle-to-vehicle) communication between vehicles; V2P (vehicle-to-pedestrian) communication between a vehicle and a device carried by an individual, e.g., a handheld terminal carried by a pedestrian, cyclist, driver, or passenger; V2I (vehicle-to-infrastructure) communication between a vehicle and a roadside unit (RSU) of traffic infrastructure, e.g., an entity transmitting speed limit notifications, and V2N (vehicle-to-network) communication between a vehicle and a node of the wireless communication network. Typically V2X communication utilizes direct wireless transmissions between V2X communication devices. However, in some cases V2X communication may also utilize network infrastructure or be assisted by network infrastructure. V2X communication may be used to provide various kinds of V2X communication services, also referred to as V2X services.

Basic V2X services include ITS (Intelligent Transport Systems) applications for improving road traffic safety and efficiency, like for example denoted as "day-one ITS services" by the European Commission in the deployment plan of Cooperative-ITS (C-ITS), see the Commission decision of <NUM> August <NUM> on the harmonised use of radio spectrum in the <NUM><NUM>-<NUM><NUM> frequency band for safety-related applications of Intelligent Transport Systems (ITS), notified under document number C(<NUM>) <NUM>, (<NUM>/<NUM>/EC). Basic V2X services include hazardous location notifications like: slow or stationary vehicle(s) and traffic ahead warning, Road works warning, weather conditions, emergency brake light, emergency vehicle approaching, other hazards. Further, basic V2X services include signage applications like: in-vehicle signage, in-vehicle speed limits, signal violation and intersection safety, traffic signal priority request by designated vehicles, green light optimal speed advisory, probe vehicle data, shockwave damping.

For basic V2X services, a dedicated ITS spectrum has been allocated in different regions of the world. In most regions, the dedicated ITS spectrum is in the range of <NUM> to <NUM>, also referred to as <NUM> spectrum. In the dedicated <NUM> ITS spectrum, only short-range V2X communication technologies are allowed. Further, the allocated bandwidth in the dedicated <NUM> ITS spectrum quite limited, e.g., only <NUM> for safety-related basic V2X services in Europe.

<CIT> describes advertising of a V2X communication service. <CIT> and <CIT> describe using signaling on another frequency for purposes of allocating resources for V2X communication.

Further, various enhanced V2X (eV2X) services have been proposed. eV2X services for example include platooning, advanced driving, extended sensor data sharing, etc. The general purpose of eV2X services is to enable automated drive and even connected autonomous vehicles. A collection of eV2X services can be found in 3GPP TR <NUM> V15. <NUM> (<NUM>-<NUM>). "<NPL>), describes a platooning service in which a platoon leader is responsible for inter-platoon communication.

As compared to the basic V2X services, eV2X services may require significantly more bandwidth, which limits the possibilities of providing eV2X services in the dedicated ITS band. Further, providing eV2X services in the dedicated ITS band may adversely affect the basic ITS services, e.g., by blocking resources. While V2X radio technologies may also enable using other frequency bands, such as licensed frequency bands for <NUM> (<NUM>th Generation) mobile communication networks or other IMT (International Mobile Telecommunications) services. However, in a given region such licensed frequency bands may be licensed to different mobile network operators (MNOs). This may have the effect that devices associated with different MNOs will not be able to engage in direct eV2X communication in the licensed frequency band.

Accordingly, there is a need for techniques which allow for efficiently providing different V2X services.

The present invention provides a method according to claim <NUM>, a method according to claim <NUM>, a V2X communication device according to claim <NUM>, a V2X communication device according to claim <NUM>, and a computer program according to claim <NUM>. The dependent claims define further embodiments.

In the following, concepts in accordance with exemplary embodiments of the invention will be explained in more detail and with reference to the accompanying drawings. The illustrated embodiments relate to controlling of V2X communication, and in particular to efficiently providing various V2X services, for example including both basic V2X services and eV2X services, in a coordinated manner, using service information transmitted in the first frequency spectrum to enable V2X communication devices to decide whether to utilize the first V2X service(s) and/or the second V2X service(s).

In the illustrated examples, one or more first V2X services are provided in a first frequency spectrum while one or more second V2X services are provided in a second frequency spectrum which is typically different from the first frequency spectrum. Further, in the first frequency spectrum the first V2X service(s) are based on a first radio technology, and in the second frequency spectrum the second V2X service(s) may be based on a second radio technology which is different from the first radio technology. By way of example, the first V2X services may include basic V2X services aiming at improving traffic safety and efficiency. The second V2X service(s) may in turn include eV2X services aiming at enabling automated driving functionalities, including autonomous driving. One example of eV2X services is platooning, which involves coordination of vehicle movements in a group of vehicles, so that the vehicles move in a well-defined formation. Another example of eV2X services is real-time sharing of vehicle sensor data by vehicles, including data provided by vehicle-based cameras, accelerometers, velocimeters, or distance sensors. In the illustrated examples, the first V2X service(s) may be based on a short-range V2X radio technology like the LTE (Long Term Evolution) PC5 interface specified by 3GPP (<NUM>rd Generation Partnership Project). The second V2X service(s) may in turn be based on another short-range V2X radio technology like the NR (New Radio) PC5 interface specified by 3GPP. The first V2X service(s) may be provided in a dedicated ITS band, e.g., in the <NUM> ITS band. The second V2X service(s) may be provided in one or more other frequency bands, for example in one or more licensed frequency bands. However, it is noted that other combinations of radio technologies or frequency spectra could be used as well. For example, in some scenarios the first frequency spectrum could also include a licensed frequency band assigned to a cellular network, and the service information could be transmitted by the cellular network, in addition or as an alternative to transmitting the service information in the first V2X service. Further, the first radio technology or second radio technology could for example also utilize a cellular downlink (DL) / uplink (UL) radio interface like the Uu interface of specified by 3GPP, e.g., the UMTS (Universal Mobile Telecommunications System) Uu interface, the LTE Uu interface, the <NUM> NR Uu interface, or an ad-hoc radio technology like the ITS-G5 technology, the IEEE <NUM>. 11p / DSRC (Dedicated Short-Range Communication) technology, or the IEEE <NUM>. 11bd / NGV (Next Generation V2X) technology.

<FIG> illustrates an exemplary scenario involving V2X communications. In particular, <FIG> shows various entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> which may engage in V2X communication, illustrated by solid arrows. Further, <FIG> shows an access node <NUM> of a wireless communication network, e.g., an eNB of the LTE technology or a gNB of the NR technology, or an access point of a WLAN (Wireless Local Area Network). At least some of the entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may also be capable of communicating by using DL radio transmissions and/or UL radio transmissions, illustrated by broken arrows. A service area, or cell, of the access node is schematically illustrated by <NUM>. The service area <NUM> may be defined by a radio coverage area in which DL radio transmissions from the access node <NUM> and UL radio transmissions to the access node <NUM> are possible. Here, it is noted that the wireless communication network may comprise further access nodes, each having a corresponding service area which may be overlapping or non-overlapping with the coverage area <NUM> of the access node <NUM>.

The entities illustrated in <FIG> comprise vehicles <NUM>, <NUM>, <NUM>, a mobile phone <NUM>, and a person <NUM>, e.g., a pedestrian, a cyclist, a driver of a vehicle, or a passenger of a vehicle. Here, it is noted that in the case of the vehicles <NUM>, <NUM>, <NUM> the radio transmissions may be performed by a communication module installed in the vehicle, and that in the case of the person <NUM> the radio transmissions may be performed by a radio device carried or worn by the person <NUM>, e.g., a wristband device or similar wearable device. These devices and modules may be also referred as UEs. Furthermore, it is noted that the entities shown in <FIG> are merely exemplary and that in the illustrated concepts other types of V2X communication device could be utilized as well, e.g., RSUs or other infrastructure based V2X communication devices, V2X communication devices based in an aircraft, like an airplane, helicopter, drone, in a spacecraft, in a train or car of a train, in a ship, in a motorcycles, in a bicycle, in a mobility scooter, or in any other kind of mobility or transportation device.

<FIG> schematically illustrates frequency spectra which may be utilized in the illustrated concepts. In particular, <FIG> illustrates an example of the above-mentioned first frequency spectrum (denoted as frequency spectrum <NUM>) and second frequency spectrum (denoted as frequency spectrum <NUM>). In the illustrated example, the first frequency spectrum includes a first frequency band (band <NUM>) and a second frequency band (band <NUM>). In the illustrated example, the first frequency band and the second frequency band are non-adjacent. However, it is noted that in other examples the first frequency band and the second frequency band could also be adjacent. Further, in the illustrated example the second frequency spectrum includes a third frequency band (band <NUM>), a fourth frequency band (band <NUM>), and a fifth frequency band (band <NUM>). In the illustrated example, the third frequency band, the fourth frequency band, and the fifth frequency band are non-adjacent. However, it is noted that in other examples at least some of the third frequency band, the fourth frequency band, and the fifth frequency band could also be adjacent. Accordingly, the first frequency spectrum and the second frequency spectrum may be continuous or discontinuous. Further, it is noted that the first frequency spectrum and the second frequency spectrum could be non-overlapping like illustrated in <FIG>, but that also overlapping configurations are possible, e.g., with one of the frequency bands of the first frequency spectrum being arranged between two of the frequency bands of the second frequency spectrum. Further, it is noted that the number of the frequency bands illustrated in <FIG> is merely exemplary and that that the first frequency spectrum and the second frequency spectrum could each include less frequency bands or more frequency bands. For example, the first frequency spectrum could include only the first frequency band and the second frequency spectrum could include only the third frequency band.

In the following explanations, it is assumed that the first frequency band is a dedicated ITS band assigned by regional or international regulation, e.g., the ITS band between <NUM> and <NUM> as for example specified in Europe or the ITS band between <NUM> and <NUM> as for example specified in the USA. The second frequency band, third frequency band, fourth frequency band, and fifth frequency band may each be licensed frequency bands which are assigned to the same MNO or to different MNOs, e.g., <NUM> frequency bands and/or IMT frequency bands. Here, the frequency band being licensed means that utilization of the frequency band is typically only allowed for devices operated by the MNO to which the frequency band is assigned or for devices of users having a subscription with the MNO to which the frequency band is assigned.

In the example as further detailed below, the first frequency band is assumed to be utilized for providing basic V2X services. The third frequency band, the fourth frequency band, and/or the fifth frequency band are in turn utilized for providing various eV2X services. In particular, the third frequency band may be utilized for providing a first eV2X service, the fourth frequency band may be utilized for providing a second eV2X service, and the fifth frequency band may be utilized for providing a third eV2X service. However, it would also be possible to utilize two or more of the third frequency band, fourth frequency band, and fifth frequency band to provide the same eV2X service, and/or to utilize the same frequency band to provide two or more of the first eV2X service, the second eV2X service, and the third eV2X service.

The first eV2X service, the second eV2X service, and the third eV2X service may differ with respect to the type of eV2X service, with respect to the utilized radio technology, with respect to a geographical area in which the eV2X service is available, or with respect to requirements and conditions of using the eV2X service, such as radio technology requirements, communication protocol requirements, subscription requirements, charging requirements, or the like. Still further, the first eV2X service, the second eV2X service, and the third eV2X service may also differ with respect to usage status, e.g., in terms of number of active users or occupancy level, and such usage status may vary depending on time and/or depending on geographical location.

In accordance with the illustrated concepts, the first frequency band may be utilized for transmitting service information. The service information indicates the availability of the eV2X services in the second frequency spectrum. This may also be referred to as advertising the eV2X services in the second frequency spectrum. In particular, the service information may indicate the availability of the first eV2X service in the third frequency band, the availability of the second eV2X service in the fourth frequency band, and/or the availability of the third eV2X service in the fifth frequency band. This may be accomplished in one or more messages of a V2X service in the first frequency band. In some scenarios, a single message of the V2X service in the first frequency band may be used to indicate the availability of multiple eV2X services in the second frequency spectrum, e.g., the availability of the first eV2X service in the third frequency band, e.g., the availability of at least two the second eV2X service in the fourth frequency band, and the availability of the third eV2X service in the fifth frequency band. In other scenarios, a separate message of the V2X service in the first frequency band may be used for each of multiple eV2X services in the second frequency spectrum to indicate its availability.

In addition or as an alternative to transmitting the service information in the first frequency band, at least a part of the service information could also be transmitted in the second frequency band. In the second frequency band, the service information could be transmitted via a cellular radio technology, e.g., the UMTS, LTE, or NR cellular radio technology. In this way, it may become possible to indicate the availability of the eV2X services in the second frequency spectrum in a wider area covered by the cellular radio technology.

The service information may indicate the type of the eV2X service, e.g. platooning, vehicle sensor sharing, or the like. In addition or as an alternative, the service information may indicate frequency information, e.g., one or more frequency bands, one or more frequency subbands within a frequency band, and/or one or more specific frequencies utilized for providing the eV2X service. In addition or as an alternative, the service information may indicate geographic information to indicate one or more geographic areas in which the eV2X service is available. In addition or as an alternative, the service information may indicate requirements and/or conditions for using the eV2X service, e.g., technology requirements like radio technology, communication protocol, or the like, charging information, etc. In addition or as an alternative, the service information may indicate information on current usage status of the eV2X service, e.g., a number of active users of the eV2X service, an occupancy level of the eV2X service, or the like. The usage status may be indicated for a certain location, e.g., for the location where the service information is receivable by a V2X communication device.

<FIG>, and <FIG> illustrate an example of how the illustrated concepts may be utilized to coordinate the utilization of the V2X services in the first frequency spectrum and the utilization of the eV2X services in the second frequency spectrum.

<FIG> illustrates an initial scenario in which multiple vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, i.e., multiple V2X communication devices, are in engaged in V2X communication. In the scenario of <FIG>, the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> all utilize one or more of the V2X services in the first frequency band. As mentioned above, one or more messages of the V2X services in the first frequency band may be used to transmit the service information indicating the availability of the eV2X services in the third frequency band, the fourth frequency band, and the fourth frequency band. At least a part of the service information could be provided via cellular radio communication in the second frequency band. Further, at least a part of the service information could be provided by one or more RSUs in one or more messages of the V2X services in the first frequency band. Further, one or more of the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> could receive the at least a part of the service information via cellular radio communication or from one or more RSUs and then forward the service information in one or more messages of the V2X services in the first frequency band to other vehicles.

Based on the received service information the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> can then decide whether to utilize one or more of the eV2X services in the second frequency spectrum and whether to continue utilizing the V2X services in the first frequency spectrum. For each vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, the decision can be based on technical capability of the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, e.g., supported radio technology or communication protocols supported by the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. For example, if the technical capability of the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> matches a technology requirement indicated by the service information for a certain eV2X service, the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may decide to utilize this eV2X service. Further, the decision can be based on the frequency band in which the eV2X service is provided. For example, if V2X communication in the frequency band indicated by the service information for a certain eV2X service is supported by the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may decide to utilize this eV2X service. Further, the decision can be based on the geographic area where the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> is currently located or which is expected to be travelled by the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. For example, if this geographical area matches the geographical area for which availability of a certain eV2X service is indicated by the service information, the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may decide to utilize this eV2X service. Further, the decision may be based on the usage status of a certain eV2X service indicated by the service information. For example, if the service information indicates that the number of users for a certain eV2X service is above a threshold, the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may decide to utilize this eV2X service. In this way, it may for example be possible to utilize a platooning service only if the group of vehicles participating in the platooning service has a certain minimum size. According to a further example, if the service information indicates that the occupancy level for a certain eV2X service is below a threshold, the vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may decide to utilize this eV2X service. In this way, it may for example be possible to avoid participating in an eV2X service which is already close to maximum occupancy. Further, the decision whether to utilize a certain eV2X service may be based on whether charging conditions indicated by the service information are acceptable. In this way, it may for example be possible to avoid participating in an eV2X service which is excessively expensive. Still further, the decision whether to utilize a certain eV2X service may be based on or on various user preferences. Based on the same or similar criteria, the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may also decide to stop utilizing a certain eV2X service.

In the example of <FIG>, it is assumed that the vehicles <NUM>, <NUM>, and <NUM> decide to utilize the first eV2X service, e.g., a first platooning service for trucks. The corresponding V2X communication in the third frequency band is indicated by a broken line between the vehicle <NUM> and the vehicle <NUM>, and by a broken line between the vehicle <NUM> and the vehicle <NUM>. Further, it is assumed that the vehicles <NUM>, <NUM>, and <NUM> decide to utilize the second eV2X service, e.g., a second platooning service for trucks. The corresponding V2X communication in the fourth frequency band is indicated by a broken line between the vehicle <NUM> and the vehicle <NUM>, and by a broken line between the vehicle <NUM> and the vehicle <NUM>. Further, it is assumed that the vehicles <NUM> and <NUM> decide to utilize the third eV2X service, e.g., a platooning service for passenger cars. The corresponding V2X communication in the fifth frequency band is indicated by a broken line between the vehicle <NUM> and the vehicle <NUM>. Further, it is assumed that the vehicles <NUM>, <NUM> decide not to utilize any of the eV2X services indicated by the service information.

As illustrated by the solid lines in <FIG>, irrespective of utilizing the eV2X service the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may continue to utilize the V2X services in the first frequency band. Accordingly, at least some of the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may support multiple V2X technologies, e.g., LTE-V2X PC5 and NR V2X PC5, and simultaneous utilization of V2X communication in different frequency bands.

In many cases, an eV2X service can provide the same or even higher level of safety-related functions than a basic V2X service. In view of this situation, the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may also decide whether to continue utilization of the V2X services in the first frequency band while also utilizing one of the eV2X services, thereby achieving a more efficient usage of radio resources in the first frequency band. In order to enable discontinuing utilization of the V2X services in the first frequency band without adversely affecting safety-related functions, the illustrated concepts may also involve that in a group of the vehicles utilizing a certain eV2X service one or more delegates are selected that continue utilizing the V2X services in the first frequency band, while other vehicles of the group stop utilizing the V2X services in the first frequency band. <FIG> illustrates a corresponding scenario.

The scenario of <FIG> assumes that, starting from the situation explained in connection with <FIG>, in the group of the vehicles <NUM>, <NUM>, <NUM> utilizing the first eV2X service the vehicles <NUM> and <NUM> were selected as delegates, that in the group of the vehicles utilizing the second eV2X service the vehicles <NUM> and <NUM> were selected as delegates, and that in the group of the vehicles utilizing the third eV2X service the vehicles <NUM> was selected as delegate. Accordingly, in the scenario of <FIG> only the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> continue utilizing the V2X services in the first frequency band, while the vehicles <NUM>, <NUM>, and <NUM> have stopped utilizing the V2X services in the first frequency band. In this way, efficiency of radio resource usage in the first frequency band can be improved, while still enabling safety related V2X functionality also between the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> utilizing different eV2X services, e.g., between the vehicles <NUM>, <NUM>, <NUM> utilizing the first eV2X service and the vehicles <NUM>, <NUM>, <NUM> utilizing the second eV2X service, and also between the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> utilizing one of the eV2X services and the vehicles <NUM>, <NUM> utilizing the V2X services in the first frequency band, but none of the eV2X service.

The selection of the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> as delegates may be based on relative positions of the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> within the group and/or in relation to other vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> another one of the eV2X services or the V2X services. The selection can be performed in a distributed manner, e.g., based on negotiation between vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> of the group. Further, at least a part of the selection can also be performed in a centralized manner, e.g., by a network node like the above-mentioned access node <NUM>, or by a specific vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> within the group. For example, the selection could be performed by a vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> designated as platoon leader or cluster leader. The selection may be performed in response to a vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> joining the group, in response to a vehicle <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> leaving the group, and/or in response to a change of conditions, such as a change of vehicle status, e.g., vehicle speed or vehicle acceleration, a change of road conditions, e.g., a change of road curvature or road surface, a change of environmental conditions, e.g., a change of weather, or the like.

<FIG> shows an example of processes in which V2X communication is controlled based on the principles as outlined above. The processes of <FIG> involve the access node (AN) <NUM> and V2X communication devices <NUM>, <NUM>, <NUM>, denoted as "V2X-A", "V2X-B", and "V2X-C". The V2X communication devices <NUM>, <NUM>, <NUM> may correspond to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or to any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. Further, it is noted that the number of the V2X communication devices <NUM>, <NUM>, <NUM> in the example of <FIG> is merely exemplary, and that in typical practical scenarios the number of the V2X communication devices <NUM>, <NUM>, <NUM> engaged in the V2X communication or eV2X communication may be significantly larger.

In the exemplary processes of <FIG>, it is assumed that initially the V2X communication devices <NUM>, <NUM>, <NUM> initially utilize the V2X services in the first frequency band, as illustrated by double-headed arrows in box <NUM>. As illustrated, this may involve that all the V2X communication devices <NUM>, <NUM>, <NUM> are engaged in direct V2X communication with each other.

As further illustrated, at some point the access node <NUM> transmits service information <NUM>. This may for example be accomplished in a broadcast message of a cellular radio technology supported by the access node <NUM>. The service information <NUM> may indicate availability of at least one eV2X service in the second frequency spectrum, e.g., availability of the above-mentioned first eV2X service, second eV2X service, or third eV2X service. In addition to merely indicating the availability, the service information <NUM> may include additional information as mentioned above.

In the example of <FIG>, the V2X communication device <NUM> receives the service information <NUM> and forwards at least a part of the received service information <NUM>, as indicated by service information <NUM>. Similarly, the V2X communication device <NUM> receives the service information <NUM> and forwards at least a part of the received service information <NUM>, as indicated by service information <NUM>, which in the illustrated example is received by the V2X communication device <NUM>. In this way, the service information <NUM>, <NUM>, <NUM> may be propagated to the different V2X communication devices <NUM>, <NUM>, <NUM>, even if some of the V2X communication devices are not within coverage of the access node <NUM> or not within coverage of V2X communication of one or more of the other V2X communication devices <NUM>, <NUM>, <NUM>.

Based on the received service information <NUM>, <NUM>, <NUM> the V2 X communication devices <NUM>, <NUM>, <NUM> then decide whether to utilize the eV2X service indicated by the service information <NUM>, <NUM>, <NUM> and whether to continue utilizing the V2X services in the first frequency band. As indicated by blocks <NUM>, <NUM>, and <NUM>, the V2X communication device <NUM> decides to join the eV2X service and leave the V2X services, the V2X communication device <NUM> decides to join the eV2X service and to continue utilizing the V2X services, and the V2X communication device <NUM> decides to not join the eV2X service and to continue utilizing the V2X services. This may for example involve a selection of the V2X communication device <NUM> as delegate like explained in connection with <FIG>.

As illustrated by double-headed arrows in box <NUM>, the V2X communication devices <NUM> and <NUM> may then utilize the eV2X service, while the V2X communication devices continue utilizing the V2X services. The V2X communication device <NUM> may forward certain messages of the eV2X service, in particular safety-related messages, or information from certain messages of the eV2X service, in particular safety-related information, in one or more messages of the V2X services to the V2X communication device <NUM>. Similarly, the V2X communication device <NUM> may forward certain messages of the V2X service, in particular safety-related messages, or information from certain messages of the V2X service, in particular safety-related information, in one or more messages of the eV2X service to the V2X communication device <NUM>.

<FIG> shows a flowchart for illustrating a procedure according to which V2X communication device, e.g., any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, may operate when implementing the illustrated concepts. The exemplary procedure assumes that one or more basic V2X services are provided in a dedicated ITS frequency band, e.g., corresponding to the above-mentioned first frequency band, and that one or more eV2X services are provided in one or more other frequency bands, e.g., corresponding to one or more of the above-mentioned third, fourth, and fifth frequency bands.

At step <NUM>, the 2X communication device utilizes the basic V2X service(s) in the dedicated ITS frequency band. This may also involve that the V2X communication device receives, transmits, or forwards service information indicating availability of one or more eV2X services, in <FIG> denoted as eV2X service information. At step <NUM>, the V2X communication device receives certain eV2X service information, which is used as a basis for deciding at step <NUM> whether the V2X communication device should join the eV2X service(s) indicated by the eV2X service information. If the V2X communication device decides not to join the eV2X service(s), the procedure returns to step <NUM>, as indicated by branch "N". If the V2X communication device decides to not join the eV2X service(s), the V2X communication device utilizes the eV2X service(s), as indicated by step <NUM>.

At step <NUM>, the V2X communication device may check whether it was selected as a delegate for forwarding of messages or information between the basic V2X service(s) and the eV2X service(s). If this is the case, the V2X communication device further utilizes the basic V2X service(s) on behalf of one or more other users of the eV2X service(s), as indicated by branch "Y" and step <NUM>. If the V2X communication device was not selected as delegate, the V2X communication device may leave the V2X service(s), as indicated by step <NUM>. After step <NUM> or <NUM> the procedure may continue with block <NUM>, where the V2X communication device decides whether to leave the eV2X service(s), e.g., based on updated service information received by the V2X communication device and/or based on a detected change of conditions. If the V2X communication device decides to leave the eV2X service(s), the procedure returns to step <NUM>, as indicated by branch "Y". If the V2X communication device decides not to leave the eV2X service(s), the procedure returns to step <NUM>, as indicated by branch "N".

<FIG> shows a flowchart for illustrating a method of controlling V2X communication, which may be utilized for implementing the illustrated concepts. The method of <FIG> may be used for implementing the illustrated concepts in a V2X communication device, e.g., corresponding to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or to any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>.

If a processor-based implementation of the V2X communication device is used, at least some of the steps of the method of <FIG> may be performed and/or controlled by one or more processors of the V2X communication device. Such V2X communication device may also include a memory storing program code for implementing at least some of the below described functionalities or steps of the method of <FIG>.

At step <NUM>, the V2X communication device receives service information in a first frequency spectrum. The service information indicates availability of at least one V2X communication service in a second frequency spectrum. The first frequency spectrum may include a dedicated ITS frequency band, e.g., like for example explained for the first frequency band of <FIG>. In addition, the first frequency spectrum may include at least one licensed frequency band e.g., like for example explained for the second frequency band of <FIG>. The second frequency spectrum may include at least one licensed frequency band, e.g., like for example explained for the third, fourth, and fifth frequency band of <FIG>.

The service information may indicate a type of the at least one V2X communication service in the second frequency spectrum. In addition or as an alternative, the service information may indicate one or more frequencies utilized for the at least one V2X communication service in the second frequency spectrum, e.g., in terms of one or more frequency bands, one or more frequency subbands, and/or one or more individual frequencies. In addition or as an alternative, the service information may indicate indicates a geographic area in which the at least one V2X communication service in the second frequency spectrum is available. In addition or as an alternative, the service information may indicate usage requirements for the at least one V2X communication service in the second frequency spectrum, e.g., a requirement related to charging conditions, a requirement related to a radio technology utilized for the at least one V2X communication service in the second frequency spectrum, or a requirement related to a communication protocol utilized for the at least one V2X communication service in the second frequency spectrum. In addition or as an alternative, the service information may indicate a usage status of the at least one V2X communication service in the second frequency spectrum, e.g., in terms of a number of users and/or in terms of an occupancy level.

The at least one V2X communication service in the second frequency spectrum may enable coordination of movements by vehicles of a group. For example, the at least one V2X communication service in the second frequency spectrum may correspond to a platooning service. In addition or as an alternative, the at least one V2X communication service in the second frequency spectrum may enable sharing of sensor data by vehicles of a group, e.g., for supporting automated driving functionalities.

The V2X communication device receives the service information based on a first radio technology, and the at least one V2X communication service in the second frequency spectrum is based on a second radio technology which is different from the first radio technology. For example, the V2X communication device may receive at least a part of the service information based on the LTE PC5 V2X interface or based on an ad-hoc radio technology like the ITS-G5 technology, the IEEE <NUM>. 11p / DSRC, or the IEEE <NUM>. 11bd / NGV technology. Still further, the V2X communication device could receive at least a part of the service information based on a cellular radio technology. The V2X communication device may receive at least a part of the service information in a V2X communication service in the first frequency spectrum, in particular in a dedicated ITS frequency band. Further, the V2X communication device may receive at least a part of the service information through a cellular network interface in the first frequency spectrum, e.g., in the above-mentioned second frequency band. In some scenarios, the V2X communication device may receive a first part of the service information through a cellular network interface in the first frequency spectrum, e.g., in the above-mentioned second frequency band, and receive a second part of the service information in a V2X communication service in the first frequency spectrum, in particular in a dedicated ITS frequency band.

At step <NUM>, the V2X communication device may forward at least a part the service information received at step <NUM>, e.g., as explained for the forwarded service information <NUM> and <NUM> in the example of <FIG>. The V2X communication device may forward at least a part of the service information in a V2X communication service in the first frequency spectrum, in particular in a dedicated ITS frequency band.

At step <NUM>, the V2X communication device controls utilization of one or more V2X services by the V2X communication device. This is accomplished based on the service information received at step <NUM>. The controlling of utilization at step <NUM> may involve that based on the received service information, the V2X communication device starts utilization of the at least one V2X communication service in the second frequency spectrum, e.g., as explained for the vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> in the scenario of <FIG>, or as explained for the V2X communication devices <NUM> and <NUM> in the example of <FIG>. In addition or as an alternative, the controlling of utilization at step <NUM> may involve that the V2X communication device stops utilization of at least one V2X communication service in the first frequency spectrum, e.g., as explained for the vehicles <NUM>, <NUM>, and <NUM> in the scenario of <FIG> or as explained for the V2X communication device <NUM> in the example of <FIG>.

At step <NUM>, the V2X communication device may participate in selection of one or more further V2X communication devices for forwarding information between the at least V2X communication service in the second frequency spectrum and at least one V2X communication service in the first frequency spectrum, e.g., as explained for the selection of delegates in the scenario of <FIG> or as explained for the forwarding of information or messages by the V2X communication device <NUM>. The selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum. In particular, the selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum relative to positions of one or more V2X communication devices utilizing the at least one V2X communication service in the first frequency spectrum.

In some scenarios, the selection of step <NUM> may be performed in response to a V2X communication device starting utilization of the at least one V2X communication service in the second frequency spectrum or in response to a V2X communication device stopping utilization of the at least one V2X communication service in the second frequency spectrum. In addition or as an alternative, the selection of step <NUM> may be performed in response to determining a change of conditions for at least one V2X communication device utilizing the at least one V2X communication service in the second frequency spectrum.

The utilization of V2X services by the V2X communication device, e.g., as controlled at step <NUM>, may involve that the V2X communication device transmits one or more messages of one or more of the V2X communication services in the first frequency spectrum or the second frequency spectrum, as indicated by step <NUM>. Further, the utilization of V2X services by the V2X communication device, e.g., as controlled at step <NUM>, may involve that the V2X communication device receives one or more messages of one or more of the V2X communication services in the first frequency spectrum or the second frequency spectrum, as indicated by step <NUM>.

At step <NUM>, the V2X communication device may forward one or more V2X messages and/or information from one or more V2X messages, e.g., the V2X message(s) received at step <NUM>. Examples of such forwarding of information from one or more V2X messages or of one or more V2X messages are explained in connection with the scenario of <FIG> and in connection with the example of <FIG>. Accordingly, in some scenarios the V2X communication device may receive one or more messages of at least one V2X communication service in the first frequency spectrum and forward information from the received one or more messages in the at least one V2X communication service in the second frequency spectrum. Further, the V2X communication device may receive one or more messages of the at least one V2X service in the second frequency spectrum and forward information from the received one or more messages in at least one V2X communication service in the first frequency spectrum.

<FIG> shows a block diagram for illustrating functionalities of a V2X communication device <NUM> which operates according to the method of <FIG>. The V2X communication device <NUM> may for example correspond to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or to any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. As illustrated, the V2X communication device <NUM> may be provided with a module <NUM> configured to receive service information, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to forward at least a part of the received service information, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may be provided with a module <NUM> configured to control utilization of V2X communication services by the V2X communication device <NUM>, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to participate in selection of one or more forwarding V2X communication devices, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to transmit one or more V2X communication messages, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to receive one or more V2X communication messages, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to forward one or more V2X communication messages, such as explained in connection with step <NUM>.

It is noted that the V2X communication device <NUM> may include further modules for implementing other functionalities, such as known functionalities of a V2X communication device. Further, it is noted that the modules of the V2X communication device <NUM> do not necessarily represent a hardware structure of the V2X communication device <NUM>, but may also correspond to functional elements, e.g., implemented by hardware, software, or a combination thereof.

<FIG> shows a flowchart for illustrating a further method of controlling V2X communication, which may be utilized for implementing the illustrated concepts. The method of <FIG> may be used for implementing the illustrated concepts in a V2X communication device, e.g., corresponding to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or to any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>.

At step <NUM>, the V2X communication device transmits service information in a first frequency spectrum. The service information indicates availability of at least one V2X communication service in a second frequency spectrum. Here, it is noted that the service information transmitted in the first frequency band may also indicate the availability in an indirect manner, by referring to further service information transmitted in the first frequency spectrum or in another frequency spectrum, e.g., on a broadcast channel. By way of example, the service information transmitted by the V2X communication device could include a reference to further service information transmitted by one or more access nodes of a wireless communication network, e.g., on a broadcast channel. Such indirect reference could also by iterated multiple times.

The first frequency spectrum may include a dedicated ITS frequency band, e.g., like for example explained for the first frequency band of <FIG>. In addition, the first frequency spectrum may include at least one licensed frequency band e.g., like for example explained for the second frequency band of <FIG>. The second frequency spectrum may include at least one licensed frequency band, e.g., like for example explained for the third, fourth, and fifth frequency band of <FIG>.

The V2X communication device transmits the service information based on a first radio technology, and the at least one V2X communication service in the second frequency spectrum is based on a second radio technology which is different from the first radio technology. For example, the V2X communication device may transmit at least a part of the service information based on the LTE PC5 V2X interface or based on an ad-hoc radio technology like the ITS-G5 technology, the IEEE <NUM>. 11p / DSRC, or the IEEE <NUM>. 11bd / NGV technology. Still further, the V2X communication device could transmit at least a part of the service information based on a cellular radio technology. The V2X communication device may transmit at least a part of the service information in a V2X communication service in the first frequency spectrum, in particular in a dedicated ITS frequency band. Further, the V2X communication device may transmit at least a part of the service information through a cellular network interface in the first frequency spectrum, e.g., in the above-mentioned second frequency band. In some scenarios, the V2X communication device may transmit a first part of the service information through a cellular network interface in the first frequency spectrum, e.g., in the above-mentioned second frequency band, and transmit a second part of the service information in a V2X communication service in the first frequency spectrum, in particular in a dedicated ITS frequency band.

The V2X communication device may determine the service information from other information received by the V2X communication device, monitored by the V2X communication device, or otherwise available at the V2X communication device, e.g., through pre-configuration. Further, the V2X communication could also determine the transmitted service information from received service information, i.e., forward at least a part of service information received by the V2X communication device.

At step <NUM>, the V2X communication device may participate in selection of one or more V2X communication devices for forwarding information between the at least V2X communication service in the second frequency spectrum and at least one V2X communication service in the first frequency spectrum, e.g., as explained for the selection of delegates in the scenario of <FIG> or as explained for the forwarding of information or messages by the V2X communication device <NUM>. The selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum. In particular, the selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum relative to positions of one or more V2X communication devices utilizing the at least one V2X communication service in the first frequency spectrum.

As indicated by step <NUM>, the V2X communication device may also transmit one or more messages of one or more of the V2X communication services in the first frequency spectrum or the second frequency spectrum. Further, the V2X communication device may receive one or more messages of one or more of the V2X communication services in the first frequency spectrum or the second frequency spectrum, as indicated by step <NUM>. At step <NUM>, the V2X communication device may forward one or more V2X messages and/or information from one or more V2X messages, e.g., the V2X message(s) received at step <NUM>. Examples of such forwarding of information from one or more V2X messages or of one or more V2X messages are explained in connection with the scenario of <FIG> and in connection with the example of <FIG>. Accordingly, in some scenarios the V2X communication device may receive one or more messages of at least one V2X communication service in the first frequency spectrum and forward information from the received one or more messages in the at least one V2X communication service in the second frequency spectrum. Further, the V2X communication device may receive one or more messages of the at least one V2X service in the second frequency spectrum and forward information from the received one or more messages in at least one V2X communication service in the first frequency spectrum.

<FIG> shows a block diagram for illustrating functionalities of a V2X communication device <NUM> which operates according to the method of <FIG>. The V2X communication device <NUM> may for example correspond to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or to any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. As illustrated, the V2X communication device <NUM> may be provided with a module <NUM> configured to transmit service information, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to participate in selection of one or more forwarding V2X communication devices, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to transmit one or more V2X communication messages, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to receive one or more V2X communication messages, such as explained in connection with step <NUM>. Further, the V2X communication device <NUM> may optionally be provided with a module <NUM> configured to forward one or more V2X communication messages, such as explained in connection with step <NUM>.

It is noted that functionalities as explained in connection with <FIG> and <FIG> could also be combined with functionalities as explained in connection with <FIG> and <FIG> in the same V2X communication device. For example, a V2X communication device receiving and utilizing service information in accordance with the method of <FIG> could further also determine and transmit service information in accordance with the method of <FIG> and optionally also utilize this service information in the same way as explained for the service information received according to the method of <FIG>.

<FIG> shows a flowchart for illustrating a further method of controlling V2X communication, which may be utilized for implementing the illustrated concepts. The method of <FIG> may be used for implementing the illustrated concepts in a network node, e.g., corresponding to the above-mentioned access node <NUM>.

If a processor-based implementation of the network node is used, at least some of the steps of the method of <FIG> may be performed and/or controlled by one or more processors of the network node. Such network node may also include a memory storing program code for implementing at least some of the below described functionalities or steps of the method of <FIG>.

At step <NUM>, the network node transmits service information in a first frequency spectrum. The service information indicates availability of at least one V2X communication service in a second frequency spectrum. Here, it is noted that the service information transmitted in the first frequency band may also indicate the availability in an indirect manner, by referring to further service information transmitted in the first frequency spectrum or in another frequency spectrum, e.g., on a broadcast channel. By way of example, the service information transmitted by the network node could include a reference to further service information transmitted by one or more other network nodes, such as access nodes of a wireless communication network, e.g., on a broadcast channel. Such indirect reference could also by iterated multiple times.

The network node transmits the service information based on a first radio technology, and the at least one V2X communication service in the second frequency spectrum is based on a second radio technology which is different from the first radio technology. For example, the network node may transmit at least a part of the service information based on a cellular radio technology, through a cellular network interface in the first frequency spectrum, e.g., in the above-mentioned second frequency band.

The network node may determine the service information from other information received by the network node, monitored by the network node, or otherwise available at the network node, e.g., through pre-configuration. Further, the network node could also determine the transmitted service information from received service information, i.e., forward at least a part of service information received by the network node.

At step <NUM>, the network node may participate in selection of one or more V2X communication devices for forwarding information between the at least V2X communication service in the second frequency spectrum and at least one V2X communication service in the first frequency spectrum, e.g., as explained for the selection of delegates in the scenario of <FIG> or as explained for the forwarding of information or messages by the V2X communication device <NUM>. The selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum. In particular, the selection of step <NUM> may be based on positions of V2X communication devices utilizing the at least one V2X communication service in the second frequency spectrum relative to positions of one or more V2X communication devices utilizing the at least one V2X communication service in the first frequency spectrum.

<FIG> shows a block diagram for illustrating functionalities of a network node <NUM> which operates according to the method of <FIG>. The network node <NUM> may for example correspond to the above-mentioned access node <NUM>. As illustrated, the network node <NUM> may be provided with a module <NUM> configured to transmit service information, such as explained in connection with step <NUM>. Further, the network node <NUM> may optionally be provided with a module <NUM> configured to participate in selection of one or more forwarding V2X communication devices, such as explained in connection with step <NUM>.

It is noted that the network node <NUM> may include further modules for implementing other functionalities, such as known functionalities of an access node or other type of network node. Further, it is noted that the modules of the network node <NUM> do not necessarily represent a hardware structure of the network node <NUM>, but may also correspond to functional elements, e.g., implemented by hardware, software, or a combination thereof.

It is noted that functionalities as explained in connection with <FIG> and <FIG> and/or functionalities as explained in connection with <FIG> and <FIG> could also be combined with functionalities as explained in connection with <FIG>, e.g., in a system including a network node transmitting service information in accordance with the method of <FIG> and one or more V2X communication devices receiving and utilizing the service information in accordance with the method of <FIG>. In addition or as an alternative to the access node, such system could also include one or more V2X communication devices transmitting service information in accordance with the method of <FIG>.

<FIG> illustrates a processor-based implementation of a V2X communication device <NUM> which may be used for implementing the above-described concepts. For example, the structures as illustrated in <FIG> may be used for implementing the concepts in any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>.

As illustrated, the V2X communication device <NUM> includes one or more radio interfaces <NUM>. The radio interface(s) <NUM> may for example support one or more of the above-mentioned V2X communication technologies. Further, the radio interface(s) <NUM> could also support DL radio transmissions and/or UL radio transmissions based on a cellular radio technology, e.g., the UMTS technology, the LTE technology, and/or the NR technology.

Further, the V2X communication device <NUM> may include one or more processors <NUM> coupled to the radio interface(s) <NUM> and a memory <NUM> coupled to the processor(s) <NUM>. By way of example, the radio interface(s) <NUM>, the processor(s) <NUM>, and the memory <NUM> could be coupled by one or more internal bus systems of the radio device <NUM>. The memory <NUM> may include a Read-Only-Memory (ROM), e.g., a flash ROM, a Random Access Memory (RAM), e.g., a Dynamic RAM (DRAM) or Static RAM (SRAM), a mass storage, e.g., a hard disk or solid state disk, or the like. As illustrated, the memory <NUM> may include software <NUM>, firmware <NUM>, and/or control parameters <NUM>. The memory <NUM> may include suitably configured program code to be executed by the processor(s) <NUM> so as to implement the above-described functionalities of a V2X communication device, such as explained in connection with <FIG>.

It is to be understood that the structures as illustrated in <FIG> are merely schematic and that the V2X communication device <NUM> may actually include further components which, for the sake of clarity, have not been illustrated, e.g., further interfaces or processors. Also, it is to be understood that the memory <NUM> may include further program code for implementing known functionalities of a V2X communication device, e.g., for implementing V2X various kinds of V2X or eV2X services. According to some embodiments, also a computer program may be provided for implementing functionalities of the V2X communication device <NUM>, e.g., in the form of a physical medium storing the program code and/or other data to be stored in the memory <NUM> or by making the program code available for download or by streaming.

<FIG> illustrates a processor-based implementation of a network node <NUM> which may be used for implementing the above described concepts. For example, the structures as illustrated in <FIG> may be used for implementing the concepts in the above-mentioned access node <NUM>.

As illustrated, the network node <NUM> includes an access interface <NUM>. The access interface <NUM> may be used for communication with one or more radio devices by DL radio transmissions and/or UL radio transmissions and for controlling these radio devices. The radio devices may in particular include V2X communication devices, e.g., corresponding to any of the above-mentioned entities <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or any of the above-mentioned vehicles <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>. If the network node corresponds to an access node, the access interface <NUM> may be a radio interface. However, in some scenarios the network node <NUM> could also correspond to a more centralized node, e.g., a core network node. In this case, the access interface <NUM> could also correspond to an interface for communication with an access node serving the radio devices. As further illustrated, the network node <NUM> may also include a network interface <NUM> which may be used for communication with other network nodes.

Further, the network node <NUM> may include one or more processors <NUM> coupled to the access interface <NUM> and a memory <NUM> coupled to the processor(s) <NUM>. By way of example, the access interface <NUM>, the processor(s) <NUM>, and the memory <NUM> could be coupled by one or more internal bus systems of the network node <NUM>. The memory <NUM> may include a ROM, e.g., a flash ROM, a RAM, e.g., a DRAM or SRAM, a mass storage, e.g., a hard disk or solid state disk, or the like. As illustrated, the memory <NUM> may include software <NUM>, firmware <NUM>, and/or control parameters <NUM>. The memory <NUM> may include suitably configured program code to be executed by the processor(s) <NUM> so as to implement the above-described functionalities of a network node, such as explained in connection with <FIG>.

It is to be understood that the structures as illustrated in <FIG> are merely schematic and that the network node <NUM> may actually include further components which, for the sake of clarity, have not been illustrated, e.g., further interfaces or processors. Also, it is to be understood that the memory <NUM> may include further program code for implementing known functionalities of an eNB of the LTE technology, a gNB of the NR technology, or other network node. According to some embodiments, also a computer program may be provided for implementing functionalities of the network node <NUM>, e.g., in the form of a physical medium storing the program code and/or other data to be stored in the memory <NUM> or by making the program code available for download or by streaming.

As can be seen, the concepts as described above may be used for efficiently coordinating provision of one or more V2X services. Specifically, by advertising one or more eV2X services in another frequency spectrum, problems due to insufficient bandwidth in a dedicated ITS frequency band can be avoided. Further, the concepts may be used to further reduce the traffic load of basic V2X services in the first frequency spectrum, in particular in the dedicated ITS frequency band, by electing the delegates among users of the a certain basic V2X service from the group of eV2X service users, and only allowing the delegates to transmit/receive messages of this basic V2X service messages in the dedicated ITS frequency band, also on behalf of users of the same basic V2X service in the group of eV2X service users. Accordingly, safety related functionalities of the basic V2X service can be maintained, without requiring that all users in the group of eV2X service users continue utilizing the basic V2X service. For users which do not act as delegates, the safety-related information in the messages of the basic V2X service can be conveyed in messages of the eV2X service.

Claim 1:
A method of controlling vehicle-to-anything, V2X, communication, the method comprising:
based on a first radio technology, a V2X communication device (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>; <NUM>; <NUM>) receiving service information in a first frequency spectrum, the service information indicating availability of at least one V2X communication service in a second frequency spectrum, the at least one V2X communication service in the second frequency spectrum being based on a second radio technology which is different from the first radio technology; and
based on the received service information, the V2X communication device (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>; <NUM>; <NUM>) controlling utilization of one or more V2X communication services by the V2X communication device (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>; <NUM>, <NUM>, <NUM>; <NUM>; <NUM>).