Method for acquiring handover network in multi-mode terminal and multi-mode terminal therefor
First Claim
1. A method for efficiently acquiring a handover network in a multi-mode terminal, which includes a first modem and a second modem supporting different communication services, the method comprising the steps of:
- determining whether a Universal Handover Direction Message (UHDM) is received from a first communication network when it is necessary to acquire a handover network;
extracting information about a handover base station from the UHDM when the UHDM has been received; and
acquiring a second communication network by using the extracted information.
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Accused Products
Abstract
Disclosed is a method capable of minimizing a period of time required for a handover network acquisition procedure when a handover occurs between communication networks which provide communication services using different mobile communication technologies. When a modem for a handover communication network performs network acquisition due to the occurrence of a handover, the modem previously extracts information about a handover channel from a Universal Handover Direction Message (UHDM), and uses the extracted channel information in a network acquisition procedure. Accordingly, the modem for a handover communication network can easily acquire a handover network even without using a preferred roaming list, and can omit an radio frequency (RF) tuning procedure by extracting a corresponding code division multiple access (CDMA) channel from the received UHDM, thereby reducing the total handover processing time period and increasing the success rate of the handover.
17 Citations
12 Claims
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1. A method for efficiently acquiring a handover network in a multi-mode terminal, which includes a first modem and a second modem supporting different communication services, the method comprising the steps of:
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determining whether a Universal Handover Direction Message (UHDM) is received from a first communication network when it is necessary to acquire a handover network;
extracting information about a handover base station from the UHDM when the UHDM has been received; and
acquiring a second communication network by using the extracted information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multi-mode terminal for efficiently acquiring a handover network, the multi-mode terminal comprising:
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a first modem for extracting a Universal Handover Direction Message (UHDM) from a handover command message, when the first modem receives the handover command message from a first communication network while communicating through the first communication network; and
a second modem for receiving the extracted UHDM from the first modem and acquiring a second communication network based on information about a handover base station, which is included in the received UHDM. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification