Allocating radio resources in mobile communications system
First Claim
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1. A method for allocating radio resources in a mobile communication system, the method comprising:
- receiving, by a mobile terminal, grouping information related to one or more preambles for accessing a Random Access Channel (RACH), wherein the one or more preambles are grouped according to an amount of the radio resources requested by the mobile terminal and the received grouping information is used to select at least one preamble group among a plurality of preamble groups;
selecting, by the mobile terminal, the at least one preamble group according to a state of the mobile terminal;
selecting, by the mobile terminal, at least one preamble from the at least one selected preamble group;
transmitting, by the mobile terminal, the at least one selected preamble;
receiving, by the mobile terminal, a radio resource allocated according to the at least one selected preamble; and
transmitting, by the mobile terminal, data using the allocated radio resource.
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Abstract
Transmitting information using a preamble of a Random Access Channel (RACH) in an Evolved Universal mobile Telecommunications System (E-UMTS) is provided. A preamble transmission is used to inform a base station of specific information when a terminal uses a RACH and the base station efficiently allocates radio resources for data transmission to the terminal according to the specific information. Delay time before the terminal transmits data is reduced and unnecessary consumption of radio resources is minimized.
124 Citations
14 Claims
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1. A method for allocating radio resources in a mobile communication system, the method comprising:
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receiving, by a mobile terminal, grouping information related to one or more preambles for accessing a Random Access Channel (RACH), wherein the one or more preambles are grouped according to an amount of the radio resources requested by the mobile terminal and the received grouping information is used to select at least one preamble group among a plurality of preamble groups; selecting, by the mobile terminal, the at least one preamble group according to a state of the mobile terminal; selecting, by the mobile terminal, at least one preamble from the at least one selected preamble group; transmitting, by the mobile terminal, the at least one selected preamble; receiving, by the mobile terminal, a radio resource allocated according to the at least one selected preamble; and transmitting, by the mobile terminal, data using the allocated radio resource. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for allocating radio resources in a mobile communication system, the method comprising:
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grouping, by a base station, one or more preambles according to an amount of the radio resources requested by the mobile terminal; transmitting, by the base station, grouping information related to the one or more preambles for accessing a Random Access Channel (RACH), wherein the transmitted grouping information is used by the mobile terminal to select at least one preamble group among a plurality of preamble groups; receiving, by the base station, at least one preamble among the one or more preambles, wherein the at least one preamble group is selected by the mobile terminal according to a state of the mobile terminal and the at least one preamble is selected by the mobile terminal from the at least one selected preamble group; transmitting, by the base station, a radio resource allocated according to the at least one selected preamble; and receiving, by the base station, data using the allocated radio resource. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification