Method and apparatus for performing random access procedures
AssigneeLG Electronics Inc.
InventorsSung-Duck Chun, Seung-June Yi, Sung-Jun Park, Young-Dae Lee
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Abstract
A mobile terminal and a method of performing a random access procedure by the terminal is achieved by transmitting a random access preamble to a base station, receiving a random access response from the base station, and performing an uplink transmission using an uplink grant from the base station. The uplink transmission is performed by using a maximum number of HARQ (Hybrid Automatic Repeat reQuest) transmissions parameter, which is included in a System Information Block (SIB) received from the base station.
Claims15
A method of performing a random access procedure by a terminal, the method comprising:
- setting two kinds of maximum number of Hybrid Automatic Repeat reQuest (HARQ) transmissions parameter, wherein a first kind of maximum number of HARQ transmissions parameter is used for transmitting an uplink data according to Random Access Channel (RACH) procedure and a second kind of maximum number of HARQ transmissions parameter is used for transmitting data other than Protocol Data Unit (MAC PDU) stored in a MSG3 buffer;
- transmitting a random access preamble which is selected at a Medium Access Control (MAC) layer in the terminal;
- receiving a random access response in response to transmitting the random access preamble;
- and
- performing an uplink transmission using an uplink grant included in the random access response,
- wherein the uplink data includes an identifier of the terminal and the uplink data transmitted using the uplink grant is a MAC PDU, and
- wherein the uplink transmission is performed by using the first kind of maximum number of HARQ transmissions parameter, which is included in a System Information Block (SIB) received from a base station.
A terminal comprising:
- A Radio Resource Control (RRC)) layer configured to receive two kinds of maximum number of Hybrid Automatic Repeat reQuest (HARQ) transmissions parameters via system information or via a dedicated massage;
- and
- a Medium Access Control (MAC) layer configured to receive the two kinds of maximum number of HARQ transmissions parameters from the RRC layer,
- wherein a first kind of maximum number of HARQ transmissions parameter is used for transmission of data related to a RACH procedure, and a second kind of maximum number of HARQ transmissions parameter is used for transmission of data other than Protocol Data Unit (MAC PDU) stored in a MSG3 buffer.
Dependencies are inferred from the claim text.