Terminal device, base station device, radio communication method, and integrated circuit

1. A terminal device configured to perform a random access procedure with a base station device, the terminal device comprising:

a processor; and

a memory,

wherein the memory stores instructions that causes the processor to:

receive random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level from the base station device;

select, based on the random access common information, a contention resolution timer value corresponding to a selected repetition level; and

perform a repetitive transmission of a message 3 based on the selected repetition level, wherein the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.

2. The terminal device according to claim 1 , wherein

the random access common information is acquired from system information of a cell corresponding to a random access procedure for each repetition level.

3. A base station device configured to perform a random access procedure with a terminal device, comprising:

a processor; and

a memory,

wherein the memory stores instructions that causes the processor to:

generate random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level; and

transmit the random access common information to the terminal device,

wherein a repetitive transmission of a message 3 is performed by the terminal device based on a repetition level selected by the terminal device,

the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.

4. The base station device according to claim 3 , wherein

the random access common information is included in system information for the terminal device corresponding to a random access procedure for each repetition level and transmitted.

5. A communication method of a terminal device configured to perform a random access procedure with a base station device, comprising the steps of:

receiving random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level from the base station device;

selecting, based on the random access common information, a contention resolution timer value corresponding to a selected repetition level; and

performing a repetitive transmission of a message 3 based on the selected repetition level, wherein the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.

6. A communication method of a base station device configured to perform a random access procedure with a terminal device, comprising the steps of:

generating random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level; and

transmitting the random access common information to the terminal device,

wherein a repetitive transmission of a message 3 is performed by the terminal device based on a repetition level selected by the terminal device,

the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.

7. An integrated circuit applied to a terminal device configured to perform a random access procedure with a base station device, comprising:

a unit configured to receive random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level from the base station device;

a unit configured to select, based on the random access common information, a contention resolution timer value corresponding to a selected repetition level; and

a unit configured to perform a repetitive transmission of a message 3 based on the selected repetition level,

wherein the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.

8. An integrated circuit applied to a base station device configured to perform a random access procedure with a terminal device, comprising:

a unit configured to generate random access common information including information on a random access response reception and information on a contention resolution timer value for each repetition level; and

a unit configured to transmit the random access common information to the terminal device,

wherein a repetitive transmission of a message 3 is performed by the terminal device based on a repetition level selected by the terminal device,

the contention resolution timer is started at a last transmission of the repetitive transmission of the message 3, and

an expiration value of the contention resolution timer is configured according to a number of repetitive transmissions of a random access preamble.