Method for handover between different type MMMB systems
First Claim
1. A method for controlling a system mode of an MMMB mobile terminal, which is capable of access to a source system and a target system employing different wireless access technologies from each other, in order to perform hard handover between different types of systems employing the different wireless access technologies from each other, the method comprising the steps of:
- judging whether or not activation conditions of a target system mode related to the target system are satisfied with respect to the mobile terminal in communication with the source system;
transmitting an activation instruction message instructing activation of the target system mode to the mobile terminal if the activation conditions are satisfied; and
performing the mobile terminal'"'"'s handover into the target system if the handover into the target system is determined after the transmission of the instruction message.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method for controlling activation/deactivation of two kinds of operation modes of an MMMB mobile terminal during handover between different types of systems. To control the activation/deactivation, a system controller instructs the mobile terminal to activate/deactivate the operation modes or provides activation/deactivation conditions to the mobile terminal. In particular, when the mobile terminal in communication is situated in a border cell neighboring a target system, the mobile terminal activates target system-related modules and then performs handover into the target system according to predetermined conditions after the passage of a predetermined time period. Such a handover method minimizes time required for performing handover, prevents deterioration of call quality during the handover, and saves power consumption of the mobile terminal.
-
Citations
55 Claims
-
1. A method for controlling a system mode of an MMMB mobile terminal, which is capable of access to a source system and a target system employing different wireless access technologies from each other, in order to perform hard handover between different types of systems employing the different wireless access technologies from each other, the method comprising the steps of:
-
judging whether or not activation conditions of a target system mode related to the target system are satisfied with respect to the mobile terminal in communication with the source system;
transmitting an activation instruction message instructing activation of the target system mode to the mobile terminal if the activation conditions are satisfied; and
performing the mobile terminal'"'"'s handover into the target system if the handover into the target system is determined after the transmission of the instruction message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for controlling a system mode of an MMMB mobile terminal, which is capable of access to a source system and a target system employing different wireless access technologies from each other, in order to perform hard handover between different types of systems employing the different wireless access technologies from each other, the method comprising the steps of:
-
receiving an activation instruction message instructing activation of a target system mode related to the target system from the source system in communication with the mobile terminal;
activating the target system mode to search the target system in response to the activation instruction message; and
performing handover into the target system if the handover into the target system is instructed from the source system. - View Dependent Claims (10, 11, 12)
-
-
13. A method for controlling a system mode of an MMMB mobile terminal, which is capable of access to a source system and a target system employing different wireless access technologies from each other, in order to perform hard handover between different types of systems employing the different wireless access technologies from each other, the method comprising the steps of:
-
transmitting an activation/deactivation control message including activation or deactivation conditions of a target system mode related to the target system to the mobile terminal in communication with the source system;
receiving an activation event report notifying that the target system mode has been activated from the mobile terminal; and
performing mobile terminal'"'"'s handover into the target system if the handover into the target system is determined after the reception of the activation event report. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. A method for controlling a system mode in order to perform hard handover between different types of systems employing different wireless access technologies from each other in an MMMB mobile terminal capable of access to a source system and a target system employing the different wireless access technologies from each other, the method comprising the steps of:
-
receiving an activation/deactivation control message including activation or deactivation conditions of a target system mode related to the target system from the source system in communication with the mobile terminal;
measuring at least one of a signal from the source system and a signal from the target system to judge whether or not the activation or deactivation conditions are satisfied;
activating the target system mode so as to search the target system if the activation conditions are satisfied as a result of the judgment; and
performing handover into the target system if the handover into the target system is instructed from the source system. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
-
-
38. A method for performing hard handover between systems employing different wireless access technologies from each other, the method comprising the steps of:
-
judging whether or not a mobile terminal in communication with the source system is located in a border cell neighboring the target system;
transmitting an activation instruction message instructing activation of modules related to the target system to the mobile terminal if the mobile terminal is located in the border cell; and
performing handover into the target system if the mobile terminal is still located in the border cell until a predetermined time T1 passes after the transmission of the activation instruction message. - View Dependent Claims (39, 40, 41, 42)
-
-
43. A method for performing hard handover between systems employing different wireless access technologies from each other, the method comprising the steps of:
-
receiving an activation event report notifying that modules related to a target system have been activated from a mobile terminal as the mobile terminal in communication with a source system is located in a dummy cell of the source system, which is co-located with the service area of the target system; and
performing handover into a cell of the target system, which is co-located with the dummy cell, if it is confirmed that the mobile terminal is located in the dummy until a predetermined time passes after the reception of the activation event report. - View Dependent Claims (44, 45, 46, 47)
-
-
48. A method for performing hard handover between systems employing different wireless access technologies from each other, the method comprising the steps of:
-
activating modules related to a target system so as to search the target system if the target system-related modules are deactivated and a mobile terminal is located in a dummy cell of the source system, which is co-located with the service area of the target system; and
performing handover into the target system if the handover into the target system is instructed from the source system. - View Dependent Claims (49, 50, 51, 52)
-
-
53. A method for performing hard handover between systems employing different wireless access technologies from each other, the method comprising the steps of:
-
performing handover between system controllers as a mobile terminal connects a call to a SRNC belonging to a source system and then moves to a DRNC belonging to the source system and neighboring a target system;
providing information about a border cell belonging to the DRNC and neighboring the target system, and information about a dummy cell, which belongs to the DRNC, neighbors the target system and transmits a downlink common channel signal of the target system, from the DRNC to the SRNC; and
controlling the mobile terminal'"'"'s handover into the target system with reference to the information about the border and dummy cells by the DRNC. - View Dependent Claims (54, 55)
-
Specification