Method of transmitting and receiving radio access information in a wireless mobile communications system
DCFirst Claim
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1. A method of performing a random access procedure in a mobile communications system, the method comprising:
- receiving, by a terminal, a handover command message from a source base station,wherein the handover command message includes preamble information for the random access procedure,wherein the preamble information is a specific preamble used only for a specific terminal, andwherein the specific preamble is determined by a target base station; and
performing, by the terminal, the random access procedure with the target base station using the specific preamble.
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Abstract
In a wireless mobile communications system, a method of transmitting and receiving radio access information that allows a faster and an efficient way of establishing a radio connection between a terminal and a target base station while performing a handover for the terminal to a cell of the target base station. The network transmits in advance, the radio access information and the like, to the terminal so that the terminal can be connected with the target cell in a faster manner which minimizes the total time for the handover process.
144 Citations
40 Claims
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1. A method of performing a random access procedure in a mobile communications system, the method comprising:
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receiving, by a terminal, a handover command message from a source base station, wherein the handover command message includes preamble information for the random access procedure, wherein the preamble information is a specific preamble used only for a specific terminal, and wherein the specific preamble is determined by a target base station; and performing, by the terminal, the random access procedure with the target base station using the specific preamble. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of performing a random access procedure in a mobile communications system, the method comprising:
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receiving, by a source base station, a handover command message from a target base station, wherein the handover command message includes preamble information for the random access procedure, wherein the preamble information is a specific preamble used only for a specific terminal, and wherein the specific preamble is determined by a target base station; and transferring, by the source base station, the received handover command message to the specific terminal, wherein the specific preamble is used to perform the random access procedure. - View Dependent Claims (8, 9)
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10. A method of performing a random access procedure in a mobile communications system, the method comprising:
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generating, by a target base station, a handover command message, wherein the handover command message includes preamble information for the random access procedure, wherein the preamble information is a specific preamble used only for a specific terminal; and transmitting, by the target base station, the handover command message to a source base station, wherein the handover command message is transferred by a source base station to the specific terminal, wherein the specific preamble is used to perform the random access procedure. - View Dependent Claims (11)
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12. A mobile terminal that performs a random access procedure in a mobile communications system, the mobile terminal comprising:
a radio protocol adapted to receive the handover command message from a source base station, and to perform the random access procedure with a target base station, wherein the handover command message includes preamble information for the random access procedure, wherein the preamble information is a specific preamble used only for a specific terminal, wherein the specific preamble is determined by a target base station, wherein the specific preamble is used to perform the random access procedure. - View Dependent Claims (13)
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14. A method of performing a handover from a terminal to a base station in a wireless communication system, the method comprising:
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transmitting, by the terminal, measurement information to a source base station; receiving, by the terminal, and after the source base station has determined that a handover should occur to a target base station, a handover command message from the source base station, wherein the handover command message includes access information, and the access information includes preamble information as identified by the target base station for use by the terminal during a random access procedure with the target base station, wherein the preamble information is a dedicated preamble used only for a specific terminal; establishing, by the terminal, and in response to the handover command message, a radio connection with the target base station, wherein the terminal connects with the target base station during the random access procedure using the preamble information identified by the target base station; and transmitting, by the terminal, a handover complete message to the target base station. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A wireless terminal device adapted to communicate data to and receive data from a source base station and a target base station in a network with a plurality of terminals including the wireless terminal device, comprising:
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a memory; a transceiver; and a processor in communication with the transceiver and the memory, the processor configured to; transmit measurement information to the source base station; receive a handover command message from the source base station as a result of the source base station having determined that a handover should occur to the target base station, wherein the handover command message includes access information, and the access information includes preamble information having been identified by the target base station for use by the wireless terminal device during a random access channel transmission with the target base station, wherein the preamble information is a dedicated preamble used only for a specific terminal; establish, in response to the handover command message, a radio connection with the target base station, wherein the wireless terminal device connects with the target base station during the random access channel transmission using the signature and preamble information identified by the target base station; and transmitting, by the wireless terminal device, a handover complete message to the target base station. - View Dependent Claims (24, 25, 26)
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27. A method of receiving a channel transfer in a wireless communication system, the method comprising:
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receiving, by a target base station, and after a source base station has determined that a handover should occur to the target base station, a handover request message from the source base station; transmitting, by the target base station, a handover confirm message to the source base station; and receiving, by the target base station, and in response to a handover command message, a radio connection to a terminal, wherein the radio connection includes access information, and the access information includes preamble information as identified by the target base station for use by the terminal during a random access channel transmission, and wherein the terminal connects with the target base station during the random access channel transmission using the access information and preamble information identified by the target base station. - View Dependent Claims (28, 29, 30, 31)
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32. A method of performing a random access procedure in a mobile communications system, the method comprising:
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receiving, by a terminal, a handover command message from a source base station that has determined that a handover should occur to a target base station; wherein the handover command message includes preamble information for the terminal previously defined in a handover confirm message sent from the target base station to the source base station, the preamble information used to avoid a collision with other terminals; in response to the handover command message, performing, by the terminal, a random access procedure with the target base station to connect with the target base station using a preamble transmission based on the preamble information; and transmitting, by the terminal, a handover complete message to the target base station. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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Specification