Handover supporting scheme in cellular mobile communication system
First Claim
1. A method of supporting a handover by a base station controller in a cellular communication system including a terminal performing the handover from a base station of a serving cell to a base station of a target cell, the method comprising:
- determining, by the base station controller, to perform the handover of the terminal;
checking, by the base station controller, whether a resource, in a frequency domain and a time domain, being used by the base station of the serving cell is available to the base station of the target cell;
allocating, by the base station controller, the same resource, in the frequency domain and the time domain, to the base station of the target cell based on the check result;
transmitting, by the base station controller, a message instructing to activate a channel with the allocated same resource to the base station of the target cell;
controlling, by the base station controller, both the base station of the serving cell and the base station of the target cell to transmit downlink traffic of the terminal together or receive uplink traffic of the terminal together on the channel with the allocated same resource, during a time interval;
driving a timer for a certain period of time; and
checking whether a message indicating success in decoding the uplink traffic of the terminal is received from the base station of the target cell before the timer expires.
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Abstract
The present disclosure proposes a method for supporting a handover by a base station controller in a cellular mobile communication system including a terminal for performing a handover from a serving cell base station to a target cell base station, the method comprising the steps of: determining handover performance of the terminal; checking whether a resource of the same frequency and time slot as a frequency and time slot of a resource in use by the serving cell base station is usable in the target cell base station; and allocating a resource of the same frequency and time slot to the target cell base station, and transmitting a message indicating channel activation of the allocated resource to the target cell base station.
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Citations
16 Claims
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1. A method of supporting a handover by a base station controller in a cellular communication system including a terminal performing the handover from a base station of a serving cell to a base station of a target cell, the method comprising:
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determining, by the base station controller, to perform the handover of the terminal; checking, by the base station controller, whether a resource, in a frequency domain and a time domain, being used by the base station of the serving cell is available to the base station of the target cell; allocating, by the base station controller, the same resource, in the frequency domain and the time domain, to the base station of the target cell based on the check result; transmitting, by the base station controller, a message instructing to activate a channel with the allocated same resource to the base station of the target cell; controlling, by the base station controller, both the base station of the serving cell and the base station of the target cell to transmit downlink traffic of the terminal together or receive uplink traffic of the terminal together on the channel with the allocated same resource, during a time interval; driving a timer for a certain period of time; and checking whether a message indicating success in decoding the uplink traffic of the terminal is received from the base station of the target cell before the timer expires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A base station control device for supporting handover of a terminal in a cellular mobile communication system including a terminal performing handover from a base station of a serving cell to a base station of a target cell, the base station control device comprising:
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a transceiver communicating with the terminal; and a processor coupled with the transceiver and configured to; determine to perform the handover of the terminal, check whether a resource, in a frequency domain and a time domain, being used by the base station of the serving cell is available to the base station of the target cell, based on whether at least one other cell adjacent to the target cell uses the same resource in the frequency domain and the time domain, allocate the same resource, in the frequency domain and the time domain, to the base station of the target cell based on the check result, control the transceiver transmit a message instructing to activate a channel with the allocated same resource to the base station of the target cell, control the base station of the serving cell and the base station of the target cell to transmit downlink traffic of the terminal together or receive uplink traffic of the terminal together on the channel with the allocated same resource, during a time interval, drive a timer for a certain period of time, and check whether a message indication success in decoding of the uplink traffic of the terminal is received from the base station of the target cell before the timer is expired. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification