Patent ID: 9730048
Date: 2017-08-08
CPC Classifications: H04W

Claim:
1. A communication control method, comprising: directly transmitting, from a second user terminal to a first user terminal, discovery signal including a first identifier associated with the second user terminal, wherein the discovery signal is for discovering another user terminal; transmitting, from the first user terminal to a first network apparatus belonging to a first Public Land Mobile Network (PLMN), a PLMN identifier and the first identifier included in the discovery signal, wherein the PLMN identifier identifies a second PLMN to which the second user terminal belongs when the first user terminal has received the discovery signal from the second user terminal; determining, by the first network apparatus, in response to receiving the first identifier, whether the first identifier is an identifier allocated in the first PLMN; in response to the first network apparatus determining that the first identifier is not the identifier allocated in the first PLMN: in response to the first network apparatus determining that the first identifier is the identifier allocated in the first PLMN: