METHOD FOR RE-ATTEMPTING A RANDOM ACCESS EFFECTIVELY
First Claim
Patent Images
1. A method of transmitting an uplink data in 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, wherein the random access response including a radio resource allocation information;
transmitting the uplink data to a network using the radio resource allocation information and starting a contention resolution timer, wherein the uplink data is transmitted using a HARQ (Hybrid Automatic Repeat request);
retransmitting the uplink data if a positive acknowledgment corresponding to the HARQ transmission is not received from the network;
determining whether or not a number of the uplink data transmissions equals to a maximum number of HARQ transmissions; and
transmitting a second random access preamble to the network before the contention resolution timer is expired, if the number of the uplink data transmissions is determined to be equal to or larger than the maximum number of HARQ transmissions.
1 Assignment
0 Petitions
Accused Products
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.
150 Citations
12 Claims
-
1. A method of transmitting an uplink data in 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, wherein the random access response including a radio resource allocation information; transmitting the uplink data to a network using the radio resource allocation information and starting a contention resolution timer, wherein the uplink data is transmitted using a HARQ (Hybrid Automatic Repeat request); retransmitting the uplink data if a positive acknowledgment corresponding to the HARQ transmission is not received from the network; determining whether or not a number of the uplink data transmissions equals to a maximum number of HARQ transmissions; and transmitting a second random access preamble to the network before the contention resolution timer is expired, if the number of the uplink data transmissions is determined to be equal to or larger than the maximum number of HARQ transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of transmitting an uplink data in 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, wherein the random access response including radio resource allocation information; transmitting the uplink data to a network using the radio resource allocation information and starting a contention resolution timer, wherein the uplink data is transmitted using a HARQ (Hybrid Automatic Repeat request); retransmitting the uplink data if a positive acknowledgment corresponding to the HARQ transmission is not received from the network; determining whether or not a number of the uplink data transmissions equals to a maximum number of HARQ transmissions; and stopping the contention resolution timer and transmitting a second random access preamble to the network if the number of the uplink data transmissions is determined to be equal to or larger than the maximum number of HARQ transmissions. - View Dependent Claims (9, 10, 11)
-
-
12. A mobile terminal for transmitting an uplink data in a wireless communications system, the mobile terminal comprising:
-
a transceiver adapted to transmit or receive the uplink data; a memory adapted to store the uplink data transmitted or received via the transceiver or from an external source; and a processor cooperating with the transceiver and the memory and adapted to perform the steps of, transmitting a first random access preamble; receiving a random access response in response to the first random access preamble, wherein the random access response including uplink grant information; transmitting uplink data to a network using the uplink grant information and starting a contention resolution timer, wherein the uplink data is transmitted using a HARQ (Hybrid Automatic Repeat request); retransmitting the uplink data if a positive acknowledgment corresponding to the HARQ transmission is not received from the network; determining whether or not a number of the uplink data transmissions equals to a maximum number of HARQ transmissions; and stopping the contention resolution timer and transmitting a second random access preamble to the network if the number of the uplink data transmissions is determined to be equal to or larger than the maximum number of HARQ transmissions.
-
Specification