Method for transmitting random access channel message and response message, and mobile communication terminal
First Claim
Patent Images
1. A method for responding to a random access channel message, the method comprising:
- receiving, at a base station, a first message including a random access channel (RACH) preamble from a user equipment;
transmitting, at the base station, a second message including a RACH preamble response to the user equipment;
receiving, at the base station after transmitting the second message including the RACH preamble response, a third message including a RACH message from the user equipment;
reading, at the base station, channel quality measurement information of a downlink channel from a medium access control (MAC) layer header of the third message including the RACH message,wherein a channel quality of the downlink channel is measured by the user equipment, andwherein the channel quality measurement information is generated by the user equipment based on the measured channel quality and is included in the third message including the RACH message which is transmitted from the user equipment to the base station;
determining, at the base station, a transmission power of a fourth message including a RACH message response which is transmitted from the base station to the user equipment, according to the channel quality measurement information; and
transmitting, by the base station in response to the third message including the RACH message, the fourth message including the RACH message response according to the transmission power determined by the base station according to the channel quality measurement information included in the third message.
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Abstract
A method for responding to a random access channel message is disclosed, the method includes reading quality measurement information of a downlink channel from a second layer header of a random access channel (RACH) message which is transmitted from a user equipment to an uplink, controlling transmission power of a response message for the RACH message according to the quality measurement information, and transmitting the response message to the user equipment.
219 Citations
20 Claims
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1. A method for responding to a random access channel message, the method comprising:
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receiving, at a base station, a first message including a random access channel (RACH) preamble from a user equipment; transmitting, at the base station, a second message including a RACH preamble response to the user equipment; receiving, at the base station after transmitting the second message including the RACH preamble response, a third message including a RACH message from the user equipment; reading, at the base station, channel quality measurement information of a downlink channel from a medium access control (MAC) layer header of the third message including the RACH message, wherein a channel quality of the downlink channel is measured by the user equipment, and wherein the channel quality measurement information is generated by the user equipment based on the measured channel quality and is included in the third message including the RACH message which is transmitted from the user equipment to the base station; determining, at the base station, a transmission power of a fourth message including a RACH message response which is transmitted from the base station to the user equipment, according to the channel quality measurement information; and transmitting, by the base station in response to the third message including the RACH message, the fourth message including the RACH message response according to the transmission power determined by the base station according to the channel quality measurement information included in the third message. - View Dependent Claims (2, 3, 4, 5, 17)
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6. A method for responding to a random access channel message, the method comprising:
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receiving, at a base station, a first message including a random access channel (RACH) preamble from a user equipment; transmitting, at the base station, a second message including a RACH preamble response to the user equipment; receiving, at the base station after transmitting the second message including the RACH preamble response, a third message including a RACH message from the user equipment; reading, at the base station, channel quality measurement information of a downlink channel included in a payload next to a medium access control (MAC) layer header from the third message including the RACH message, wherein a channel quality of the downlink channel is measured by the user equipment, and wherein the channel quality measurement information is generated by the user equipment based on the measured channel quality and is included in the third message including the RACH message which is transmitted from the user equipment to the base station; determining, at the base station, a transmission power of a fourth message including a RACH message response which is transmitted from the base station to the user equipment, according to the channel quality measurement information; and transmitting, by the base station in response to the third message including the RACH message, the fourth message including the RACH message response according to the transmission power determined by the base station according to the channel quality measurement information included in the third message. - View Dependent Claims (7, 18)
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8. A method for transmitting a random access channel (RACH) message, the method comprising:
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transmitting, at a user equipment, a first message including a random access channel (RACH) preamble to a base station; receiving, at the user equipment, a second message including a RACH preamble response from the base station; at the user equipment, measuring channel quality of a downlink channel and generating channel quality measurement information of the downlink channel based on the measured channel quality; at the user equipment, including the channel quality measurement information in a medium access control (MAC) layer header of a third message including RACH message and transmitting, after receiving the second message including the RACH preamble response, the third message including the RACH message via an uplink to the base station; and at the user equipment, receiving a fourth message including a RACH message response in response to the third message including the RACH message from the base station, wherein the channel quality measurement information is read by the base station from the MAC layer header of the third message including the RACH message which is transmitted from the user equipment to the base station, and a transmission power of the fourth message including the RACH message response which is transmitted from the base station to the user equipment is determined by the base station according to the channel quality measurement information included in the third message. - View Dependent Claims (9, 10, 11, 12, 19)
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13. A method for transmitting a random access channel (RACH) message, the method comprising:
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transmitting, at a user equipment, a first message including a random access channel (RACH) preamble to a base station; receiving, at the user equipment, a second message including a RACH preamble response from the base station; at the user equipment, measuring a channel quality of a downlink channel and generating channel quality measurement information of the downlink channel based on the measured channel quality; at the user equipment, including the channel quality measurement information in a payload next to a medium access control (MAC) layer header of a third message including the RACH message and transmitting, after receiving the second message including the RACH preamble response, the third message including the RACH message via an uplink to the base station; and at the user equipment, receiving a fourth message including a RACH message response in response to the third message including the RACH message from the base station, wherein the channel quality measurement information is read by the base station from the payload next to the MAC layer header of the third message including the RACH message which is transmitted from the user equipment to the base station, and a transmission power of the fourth message including the RACH message response which is transmitted from the base station to the user equipment is determined by the base station according to the channel quality measurement information included in the third message. - View Dependent Claims (14, 20)
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15. A mobile communication terminal for transmitting data via an uplink through random access in a mobile communication system, the mobile communication terminal comprising:
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a message transmission unit configured to transmit a first message including a random access channel (RACH) preamble to a base station; and a downlink channel measurement unit configured to measure a channel quality of a downlink channel and generate channel quality measurement information of the downlink channel based on the measured channel quality, wherein the mobile communication terminal is configured to receive, from the base station, a second message including a RACH preamble response in response to the first message including the RACH preamble, wherein the message transmission unit is further configured to include the channel quality measurement information in a medium access control (MAC) layer header of a third message including a RACH message and transmitting, after receiving the second message including the RACH preamble response, the third message including the RACH message via the uplink to the base station, wherein the mobile communication terminal is further configured to receive a fourth message including a RACH message response in response to the third message including the RACH message from the base station, and wherein the channel quality measurement information is read by the base station from the MAC layer header of the third message including the RACH message which is transmitted from the user equipment to the base station, and a transmission power of the fourth message including the RACH message response which is transmitted from the base station to the user equipment is determined by the base station according to the channel quality measurement information included in the third message.
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16. A mobile communication terminal for transmitting data via an uplink through random access in a mobile communication system, the mobile communication terminal comprising:
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a message transmission unit configured to transmit a first message including a random access channel (RACH) preamble to a base station; and a downlink channel measurement unit configured to measure a channel quality of a downlink channel and generate channel quality measurement information of the downlink channel based on the measured channel quality, wherein the mobile communication terminal is configured to receive, from the base station, a second message including a RACH preamble response in response to the first message including the RACH preamble, wherein the message transmission unit is further configured to include the channel quality measurement information in a payload next to a medium access control (MAC) layer header of a third message including a RACH message and transmitting, after receiving the second message including the RACH preamble response, the third message including the RACH message via the uplink to the base station, wherein the mobile communication terminal is further configured to receive a fourth message including a RACH message response in response to the third message including the RACH message from the base station, and wherein the channel quality measurement information is read by the base station from the payload next to the MAC layer header of the third message including the RACH message which is transmitted from the user equipment to the base station, and a transmission power of the fourth message including the RACH message response which is transmitted from the base station to the user equipment is determined by the base station according to the channel quality measurement information included in the third message.
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Specification