Method for re-attempting a random access effectively
First Claim
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1. A method of transmitting uplink data in a wireless communication system, the method comprising:
- transmitting a first random access preamble;
receiving a random access response in response to the first random access preamble, the received random access response including radio resource allocation information;
transmitting the uplink data using the radio resource allocation information and starting a contention resolution timer, the uplink data transmitted using Hybrid Automatic Repeat Request (HARQ);
re-transmitting the uplink data when a positive acknowledgment corresponding to the uplink data transmission is not received;
determining whether a number of uplink data transmissions is equal to or greater than a maximum number of HARQ transmissions; and
transmitting a second random access preamble before the contention resolution timer expires when the number of uplink data transmissions is equal to or greater than the maximum number of HARQ transmissions.
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Abstract
Disclosed is a radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, to a method for re-attempting a rapid random access when a problem occurs in the random access procedure in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system.
174 Citations
12 Claims
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1. A method of transmitting uplink data in a wireless communication system, the method comprising:
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transmitting a first random access preamble; receiving a random access response in response to the first random access preamble, the received random access response including radio resource allocation information; transmitting the uplink data using the radio resource allocation information and starting a contention resolution timer, the uplink data transmitted using Hybrid Automatic Repeat Request (HARQ); re-transmitting the uplink data when a positive acknowledgment corresponding to the uplink data transmission is not received; determining whether a number of uplink data transmissions is equal to or greater than a maximum number of HARQ transmissions; and transmitting a second random access preamble before the contention resolution timer expires when the number of uplink data transmissions is equal to or greater than the maximum number of HARQ transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of transmitting uplink data in a wireless communication system, the method comprising:
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transmitting a first random access preamble; receiving a random access response in response to the first random access preamble, the received random access response including radio resource allocation information; transmitting the uplink data using the radio resource allocation information and starting a contention resolution timer, the uplink data transmitted using Hybrid Automatic Repeat Request (HARQ); re-transmitting the uplink data when a positive acknowledgment corresponding to the uplink data transmission is not received; determining whether a number of uplink data transmissions is equal to or greater than a maximum number of HARQ transmissions; and stopping the contention resolution timer and transmitting a second random access preamble when the number of uplink data transmissions is equal to or greater than the maximum number of HARQ transmissions. - View Dependent Claims (9, 10, 11)
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12. A mobile terminal for transmitting uplink data in a wireless communications system, the mobile terminal comprising:
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a transceiver adapted to transmit or receive the uplink data; a memory adapted to store uplink data transmitted or received via the transceiver or received from an external source; and a processor adapted to; transmit a first random access preamble, receive a random access response in response to the first random access preamble, the received random access response including uplink grant information, transmit uplink data using the uplink grant information and start a contention resolution timer, the uplink data transmitted using Hybrid Automatic Repeat Request (HARQ), re-transmit the uplink data when a positive acknowledgment corresponding to the uplink data transmission is not received, determine whether a number of uplink data transmissions is equal to or greater than a maximum number of HARQ transmissions, and stop the contention resolution timer and transmit a second random access preamble when the number of uplink data transmissions is equal to or greater than the maximum number of HARQ transmissions.
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Specification