Group messaging cancellation method in wireless communication system and device therefor
A method for cancelling a group messaging in a wireless communication system and an apparatus for the same is disclosed. Particularly, a method for cancelling a group messaging performed by a network node in a wireless communication system may include receiving a group messaging cancellation request message that includes a group messaging identifier of a group messaging requested to be cancelled and cancellation indication information and stopping a transmission of a group messaging that corresponds to the group messaging identifier, and transmitting the group messaging identifier to a user equipment.
1. A method for cancelling a group messaging performed by a network node in a wireless communication system, comprising:
receiving a group messaging cancellation request message that includes a group messaging identifier for a group messaging requested to be cancelled and cancellation indication information;
stopping a transmission of the group messaging that corresponds to the group messaging identifier, and transmitting the group messaging identifier to a user equipment,
wherein cancellation of the group messaging is rejected, in order not to transmit the group messaging identifier, when a time window has already expired after a point in time of transmitting the group messaging; and
transmitting an RRC Connection Reject message when an RRC Connection Request message that includes the group messaging identifier is received.
2. The method of claim 1 , wherein the cancellation of the group messaging is rejected, in order not to transmit the group messaging identifier to the user equipment, when a time equal to a sum of the time window and a predetermined time has already expired after the point in time of transmitting the group messaging delivery request message.
3. The method of claim 1 , further comprising transmitting a Service Request Reject message when an Initial UE message that includes the group messaging identifier is received.
4. The method of claim 1 , wherein the group messaging identifier includes a message identifier and a serial number.
5. A network node device for cancelling group messaging performed in a wireless communication system, the network node device comprising:
a transceiver; and
a processor configured to:
control the transceiver to receive a group messaging cancellation request message that includes a group messaging identifier for a group messaging requested to be cancelled and cancellation indication information;
stop a transmission of the group messaging that corresponds to the group messaging identifier;
control the transceiver to transmit the group messaging identifier to a user equipment,
wherein cancellation of the group messaging is rejected, in order not to transmit the group messaging identifier, when a time window has already expired after a point in time of transmitting the group messaging; and
transmit an RRC Connection Reject message when an RRC Connection Request message that includes the group messaging identifier is received.