Method and apparatus for communication in portable terminal using multiple SIM cards
The present disclosure relates to a method and an apparatus for communication in a portable terminal using multiple Subscriber Identity Module (SIM) cards. The method includes: camping on a predetermined cell by each of the multiple SIM cards; determining whether paging collision occurs between a communication network supported by the predetermined cell on which the portable terminal has camped through a SIM card and another communication network supported by the predetermined cell on which the portable terminal has camped through another SIM card; identifying paging information through a predetermined SIM card among the multiple SIM cards after identifying camp-on information for each SIM card when a result of the determination shows that the paging collision occurs; and performing a paging standby for the communication network in the predetermined camped-on cell by the SIM card corresponding to the identified paging information based on a result of identifying the paging information.
1. A method for enabling communication in a portable terminal using multiple Subscriber Identity Module (SIM) cards, the method comprising:
camping on a same predetermined cell by at least a first SIM card and a second SIM card;
determining whether a paging collision has occurred between a first communication network on which the portable terminal has camped through the first SIM card and a second communication network on which the portable terminal has camped through the second SIM card;
when the page collision has occurred identifying camp-on information for each of the first and second SIM cards;
identifying paging information based on the camp-on information;
determining whether the paging information corresponds to the first SIM card; and
if the paging information corresponds to the first SIM card, performing a paging standby for the first communication network.
2. The method as claimed in claim 1 , wherein each of the first and second communication networks corresponds to a communication network employing a Global System for Mobile Communication (GSM) scheme.
3. The method as claimed in claim 2 , wherein the paging information is identified by reading a paging block in a respective slot of at least four GSM frames of the GSM scheme.
4. The method as claimed in claim 2 , wherein determining whether the paging collision has occurred comprises identifying GSM frames on which the portable terminal has camped through each of the first SIM card and the second SIM card.
5. The method as claimed in claim 4 , wherein determining whether the paging collision has occurred comprises determining whether a first paging period for the first SIM card is equal to a second paging period for the second SIM card.
6. The method as claimed in claim 1 , wherein the camp-on information is identified through a Stand-alone Dedicated Control Channel (SDCCH) from a predetermined cell.
7. The method as claimed in claim 1 , wherein the camp-on information is System Information (SI) broadcasted from a predetermined cell to access the first and second communication networks.
8. The method as claimed in claim 1 , before determining whether a paging collision has occurred, further comprising:
camping on a predetermined cell by each of the first and second SIM cards.
9. The method as claimed in claim 1 , further comprising:
if the paging information doesn't correspond to the first SIM card, performing the paging standby for the second communication network.
10. A portable terminal using multiple Subscriber Identity Module (SIM) cards, the portable terminal comprising:
a first SIM card and a second SIM card, each of the first and second SIM cards including user information; and
a controller configured to:
camp on a same predetermined cell by at least a first SIM card and a second SIM card, and to determine whether a paging collision has occurred between a first communication network on which the portable terminal has camped through the first SIM card and a second communication network on which the portable terminal has camped through the second SIM card,
when the page collision has occurred, identify camp-on information for each of the first and second SIM cards,
identify paging information based on the camp-on information,
determine whether the paging information corresponds to the first SIM card, and
if the paging information corresponds to the first SIM card, perform a paging standby for the first communication network.
11. The portable terminal as claimed in claim 10 , wherein each of the first and second communication networks corresponds to a communication network employing a Global System for Mobile Communication (GSM) scheme.
12. The portable terminal as claimed in claim 11 , wherein the paging information is identified by reading a paging block in a respective slot of at least four GSM frames of the GSM scheme.
13. The portable terminal as claimed in claim 11 , wherein the controller determines whether the paging collision has occurred by identifying GSM frames on which the portable terminal has camped through each of the first SIM card and the second SIM card.
14. The portable terminal as claimed in claim 10 , wherein the controller determines whether the paging collision has occurred by determining whether a first paging period for the first SIM card is equal to a second paging period for the second SIM card.
15. The portable terminal as claimed in claim 10 , wherein the camp-on information is identified through a Stand-alone Dedicated Control Channel (SDCCH) from a predetermined cell.
16. The portable terminal as claimed in claim 11 , wherein the camp-on information is System Information (SI) broadcasted from a predetermined cell to access the first and second communication networks.
17. The portable terminal as claimed in claim 10 , wherein the controller performs the paging standby for the second communication network if the paging information doesn't correspond to the first SIM card.