Method and network node for transmitting IP address information, and method and user equipment for receiving IP address information
Provided is a method for making it impossible to track a vehicle performing vehicle-to-everything (V2X) communication through a network. The network may allocate the same IP address to all UEs performing V2X communication. Since the UEs performing V2X communication transmit data using the same IP address, an application server cannot track a vehicle transmitting corresponding data.
1. A method of transmitting Internet protocol (IP) address information by a network node in a wireless communication system, the method comprising:
receiving IP address allocation requests from a plurality of user equipments (UEs);
allocating IP addresses to the plurality of UEs, respectively; and
communicating with the plurality of UEs based on the respective IP addresses,
wherein the IP address allocation requests include first IP address allocation requests not related to vehicle-to-everything (V2X) communication from first UEs and second IP address allocation requests related to the V2X communication from second UEs,
wherein allocating the IP addresses comprises:
allocating different IP addresses to the first UEs in response to the first IP address allocation requests not related to the V2X communication; and
allocating a same IP address to all of the second UEs in response to the second IP address allocation requests related to the V2X communication, and
wherein the same IP address allocated in response to the second IP address allocation requests related to the V2X communication is a specific IP address defined for the V2X communication is a specific IP address defined for the V2X communication.
2. The method according to claim 1 , wherein each of the IP address allocation requests is received in a packet data network (PDN) connectivity request message.
3. The method according to claim 1 , wherein each of the second IP address allocation requests is a request for connectivity to a packet data network (PDN) for the V2X communication or an IP address allocation request associated with an access point name (APN) for the V2X communication.
4. The method according to claim 1 , further comprising:
receiving uplink V2X data from at least one of the second UEs based on the specific IP address.
5. The method according to claim 4 , further comprising:
transmitting the uplink V2X data to an application server for the V2X communication.
6. The method according to claim 1 , wherein the network node is a packet data network (PDN) gateway.
7. A network node for transmitting Internet protocol (IP) address information in a wireless communication system, the network node comprising:
a transceiver; and
a processor configured to control the transceiver,
wherein the processor is configured to:
control the transceiver to receive IP address allocation requests from a plurality of user equipments (UEs);
allocate IP addresses to the plurality of UEs, respectively; and
control the transceiver to communicate with the plurality of UEs based on the respective IP addresses,
wherein the IP address allocation requests include first IP address allocation requests not related to vehicle-to-everything (V2X) communication from first UEs and second IP address allocation requests related to the V2X communication from second UEs,
wherein the processor allocates the IP addresses by:
allocating different IP addresses to the first UEs in response to the first IP address allocation requests not related to the V2X communication; and
allocating a same IP address to all of the second UEs in response to the second IP address allocation requests related to the V2X communication, and
wherein the same IP address allocated in response to the second IP address allocation requests related to the V2X communication is a specific IP address defined for the V2X communication.
8. The network node according to claim 7 , wherein each of the IP address allocation requests is received in a packet data network (PDN) connectivity request message.
9. The network node according to claim 7 , wherein each of the second IP address allocation requests is a request for connectivity to a packet data network (PDN) for the V2X communication or an IP address allocation request associated with an access point name (APN) for the V2X communication.
10. The network node according to claim 7 , wherein the processor controls the transceiver to receive uplink V2X data from at least one of the second UEs based on the specific IP address.
11. The network node according to claim 10 , wherein the processor controls the transceiver to transmit the uplink V2X data to an application server for the V2X communication.
12. The network node according to claim 7 , wherein the network node is a packet data network (PDN) gateway.