Transmitting device and receiving device for bundled transmission of packets in wireless communications for vehicles and transport systems

1. A transmitting device for wireless vehicle-to-X (V2X) communications, the transmitting device comprising:

a processor configured to determine a bundle of multiple downlink transmissions each for transmitting a packet, each respective transmission of the bundle of multiple downlink transmissions being a respective beam transmission to which is allocated a different respective beam slot, wherein the processor is configured to determine, for the bundle of multiple beam transmissions for transmitting the packet, a number of the multiple beam transmissions, a periodicity of the multiple beam transmissions, and a spatial relationship between one or more antenna ports from which the multiple beam transmissions are to be transmitted; and

a transceiver configured to transmit, to a receiving device and/or a group of receiving devices using the determined multiple transmissions.

2. The transmitting device according to claim 1 , the processor is configured to determine the number of the multiple beam transmissions depending on whether the packet is initially transmitted or is retransmitted to the receiving device and/or the group of receiving devices.

3. The transmitting device according to claim 1 , wherein each respective beam slot is assigned a resource set that includes one or more of: a time resource, a frequency resource, a code resource, a spatial resource.

4. A receiving device for wireless vehicle-to-X (V2X) communications, the receiving device comprising:

a transceiver configured to receive a packet in each of multiple respective transmissions of a bundle of downlink transmissions from a transmitting device, each respective transmission being a respective beam transmission to which is allocated a different respective beam slot, and

a processor configured to, based on a number of the multiple beam transmissions, a periodicity of the multiple beam transmissions, and at least one quasi co-location (QCL) assumption for the multiple beam transmissions, combine the multiple beam transmissions and/or decode at least one respective beam transmission to obtain the packet.

5. The receiving device according to claim 4 , wherein the transceiver is further configured to send feedback information for the packet to the transmitting device or to another receiving device in a determined resource.

6. The receiving device according to claim 5 , wherein the feedback information includes an acknowledgement (ACK) and a negative-acknowledgment (NACK), wherein the ACK and the NACK are allocated to different resources.

7. The receiving device according to claim 5 , wherein the feedback information includes:

an ID of the receiving device or an ID of a group of receiving devices the receiving device belongs to, and/or

Quasi Co-Location (QCL) reference information.

8. The receiving device according to claim 5 , wherein the transceiver is further configured to send the feedback information on a channel and/or resource shared with other receiving devices to the transmitting device.

9. The receiving device according to claim 5 , wherein the transceiver is configured to receive feedback information from at least one other receiving device, and

wherein the processor is further configured to aggregate and/or concatenate feedback information received from a first other receiving device with own feedback information and/or with feedback information received from a second other receiving device, and

wherein the transceiver is further configured to send the aggregated and/or concatenated feedback information to the transmitting device or another receiving device.

10. The receiving device according to claim 9 , wherein the transceiver is further configured to receive signaling that indicates whether to send the aggregated and/or concatenated feedback information to the transmitting device or to the other receiving device.

11. The receiving device according to claim 5 , wherein the transceiver is configured to receive feedback information including a negative-acknowledgement (NACK) or an acknowledgement (ACK) and/or a corresponding index from at least one other receiving device, and

wherein the processor is further configured to aggregate and/or concatenate the NACK or the ACK and/or the corresponding index and send the aggregated and/or concatenated feedback information to the transmitting device or other receiving device.

12. The receiving device according to claim 5 , wherein the transceiver is further configured to send the feedback information according to a reference timing,

wherein the reference timing includes at least one element selected from the group of elements consisting of:

a predefined time resource,

a first time resource that is allocated to the more than one transmission,

a time resource wherein the transmitted channel and/or signal of the time resource is quasi co-located with a channel and/or a signal identified during initial access and/or after initial access, or

a time resource allocated to the last received transmission of the more than one transmission.

13. The receiving device according to claim 5 , wherein the feedback information includes an acknowledgement (ACK) or a negative-acknowledgment (NACK) or includes ACK and NACK, and

wherein the determined resource is at least one of:

a common preamble sequence,

a common Physical Uplink Control Channel (PUCCH) resource, or

a common Physical Uplink Shared Channel (PUSCH) resource for the receiving device and at least one other receiving device.

14. The receiving device according to claim 13 , wherein, when the feedback information includes ACK and NACK, the transceiver is configured to transmit the feedback information using at least one of:

different common preamble sequences,

different common PUCCH resources, or

different common PUSCH resources.

15. The receiving device according to claim 4 , wherein each respective beam slot is assigned a resource set that includes one or more of: a time resource, a frequency resource, a code resource, a spatial resource.