Support of quality of service for V2X transmissions
The present disclosure relates to a transmitting device for transmitting vehicular data via a sidelink interface to one or more receiving devices. The transmitting device performs autonomous radio resource allocation for transmitting the vehicular data via the sidelink interface. An application layer generates the vehicular data and forwards the vehicular data together with a priority indication and one or more quality of service parameters to a transmission layer responsible for transmission of the vehicular data via the sidelink interface. The transmission layer performs autonomous radio resource allocation based on the received priority indication and the one or more quality of service parameters. The transmission layer transmits the vehicular data via the sidelink interface to the one or more receiving devices according to the performed autonomous radio resource allocation.
1 . A communication apparatus comprising:
circuitry, which, in operation,
forwards vehicular data together with a priority indication from an application layer to a transmission layer;
determines, in the transmission layer, one of one or more quality of service configurations depending on the priority indication forwarded from the application layer; and
performs autonomous radio resource allocation for transmitting the vehicular data via a sidelink interface based on the determined one quality of service configuration, and
a transmitter, which is coupled to the circuitry and which, in operation, transmits the vehicular data via the sidelink interface to one or more receiving apparatuses according to the autonomous radio resource allocation,
wherein, in case different sidelink logical channels are multiplexed in one transport block (TB) to transmit the vehicular data, transmission of the TB via the sidelink interface is performed based on a sidelink logical channel associated with the highest priority indication among the different sidelink logical channels associated with priority indications.
2 . The communication apparatus according to claim 1 , wherein each of the one or more quality of service configurations indicates at least one of:
a packet delay budget: indicating an upper time limit allowed for transmitting the vehicular data upon becoming available for transmission,
a packet error loss rate: indicating an allowed rate of lost vehicular data,
a resource type: having or not having a guaranteed bit rate.
3 . The communication apparatus according to claim 1 ,
wherein the priority indication forwarded together with the vehicular data to the transmission layer indicates the priority of the vehicular data, and
wherein the one quality of service configuration is determined based on the priority indication and a mapping stored in the communication apparatus associating each of the one or more quality of service configurations with a priority indication value.
4 . The communication apparatus according to claim 3 , comprises:
a receiver, which, in operation, receives the mapping in system information broadcast from a radio base station.
5 . The communication apparatus according to claim 3 , comprises:
a receiver, which, in operation, receives, at the transmission layer, the mapping from the application layer.
6 . The communication apparatus according to claim 1 , wherein the circuitry:
generates a quality of service class indication (QCI) indicating the determined one quality of service configuration,
wherein the priority indication forwarded together with the vehicular data to the transmission layer corresponds to the generated QCI.
7 . The communication apparatus according to claim 1 , wherein each of the one or more quality of service configurations is associated with a quality of service class identifier (QCI) value.
8 . The communication apparatus according to claim 7 , wherein the priority indication associated with the vehicular data is used to determine a QCI value associated with the priority indication and to determine the one quality of service configuration associated with the determined QCI value.
9 . A method implemented in a communication apparatus, the method comprising:
forwarding vehicular data together with a priority indication from an application layer to a transmission layer;
determining, in the transmission layer, one of one or more quality of service configurations depending on the priority indication forwarded from the application layer,
performing autonomous radio resource allocation for transmitting the vehicular data via a sidelink interface based on the determined one quality of service configuration; and
transmitting the vehicular data via the sidelink interface to one or more receiving apparatuses according to the autonomous radio resource allocation,
wherein, in case different sidelink logical channels are multiplexed in one transport block (TB) to transmit the vehicular data, transmission of the TB via the sidelink interface is performed based on a sidelink logical channel associated with the highest priority indication among the different sidelink logical channels associated with priority indications.