V2X communication device and geo-networking transmission method

1. A method of geo-networking transmission based on hybrid communication including direct communication and cellular communication, the method comprising:

receiving a message from at least one neighboring vehicle; and

transmitting a geo-networking packet to the at least one neighboring vehicle, wherein

the transmission of the geo-networking packet is performed based on at least one forwarding algorithm of a greedy-based forwarding algorithm, a sender-managed forwarding algorithm, or a contention-based forwarding algorithm,

wherein the received message is related to a Cooperative Awareness Message (CAM), a Decentralized Environmental Notification Message (DENM), or a Basic Safety Message (BSM),

wherein the greedy-based forwarding algorithm includes at least one type of an enhanced greedy forwarding 1 (EFG1) algorithm or an enhanced greedy forwarding 2 (EFG2) algorithm,

wherein the sender managed forwarding algorithm includes at least one type of a sender managed forwarding 1 (SMF1) algorithm or a sender managed forwarding 1 (SMF2) algorithm, and

wherein the contention-based forwarding algorithm includes an enhanced contention-based Forward 1 (ECBF1) algorithm, an enhanced contention-based forward 2 (ECBF2) algorithm, a combined sender-based and contention-based forwarding (CSCF) algorithm, an enhance combined sender-based and contention-based forwarding 1 (ECSCF1) algorithm, or an enhance combined sender-based and contention-based forwarding 2 (ECSCF2) algorithm.

2. The method of claim 1 , wherein the received message includes hybrid capability information for the neighboring vehicle, and wherein the hybrid capability information is related to the neighboring vehicle being capable of the hybrid communication.

3. The method of claim 2 , wherein the received message includes cellular in range information, and wherein the cellular in range information is related to the neighboring vehicle being within coverage of a cellular base station.

4. The method of claim 1 , wherein the geo-networking packet includes forwarding algorithm type information, and wherein the forwarding algorithm type information identifies a type of forwarding algorithm through which the geo-networking packet is transmitted.

5. The method of claim 3 , wherein based on the transmission of the geo-networking packet being performed based on the contention-based forwarding algorithm, a buffering time of a timer for packet forwarding is determined based on at least one of a hybrid communication capability of a receiver receiving the geo-networking packet or the receiver being within the cellular coverage.

6. A communication device performing hybrid communication including direct communication and cellular communication, the communication device comprising:

a memory storing data;

a transceiver transmitting and receiving a wireless signal including a geo-networking packet; and

a processor controlling the memory and the transceiver, wherein the processor:

receives a message from at least one neighboring vehicle; and

transmits a geo-networking packet to the at least one neighboring vehicle, wherein the received message is related to a Cooperative Awareness Message (CAM), a Decentralized Environmental Notification Message (DENM), or a Basic Safety Message (BSM),

wherein the transmission of the geo-networking packet is performed based on at least one forwarding algorithm of a greedy-based forwarding algorithm, a sender-managed forwarding algorithm, or a contention-based forwarding algorithm,

wherein the greedy-based forwarding algorithm includes at least one type of an enhanced greedy forwarding 1 (EFG1) algorithm or an enhanced greedy forwarding 2 (EFG2) algorithm,

wherein the sender managed forwarding algorithm includes at least one type of a sender managed forwarding 1 (SMF1) algorithm or a sender managed forwarding 1 (SMF2) algorithm, and

wherein the contention-based forwarding algorithm includes an enhanced contention-based Forward 1 (ECBF1) algorithm, an enhanced contention-based forward 2 (ECBF2) algorithm, a combined sender-based and contention-based forwarding (CSCF) algorithm, an enhance combined sender-based and contention-based forwarding 1 (ECSCF1) algorithm, or an enhance combined sender-based and contention-based forwarding 2 (ECSCF2) algorithm.

7. The communication device of claim 6 , wherein the received message includes hybrid capability information for the neighboring vehicle, and wherein the hybrid capability information is related to the neighboring vehicle being capable of the hybrid communication.

8. The communication device of claim 7 , wherein the received message includes cellular in range information, and wherein the cellular in range information is related to the neighboring vehicle being within coverage of a cellular base station.

9. The communication device of claim 6 , wherein the geo-networking packet includes forwarding algorithm type information, and wherein the forwarding algorithm type information identifies a type of forwarding algorithm through which the geo-networking packet is transmitted.

10. The communication device of claim 8 , wherein based on the transmission of the geo-networking packet being performed based on the contention-based forwarding algorithm, a buffering time of a timer for packet forwarding is determined based on at least one of a hybrid communication capability of a receiver receiving the geo-networking packet or the receiver being within the cellular coverage.