User apparatus and base station apparatus
A user apparatus that communicates with a base station apparatus is provided. The user apparatus includes a reception unit configured to receive, from the base station apparatus, an indication for an individual random access preamble, information indicating correspondence to non-contention based random access procedure, and a random access response; a transmission unit configured to transmit the individual random access preamble to the base station apparatus; and a control unit configured to, in response to receiving the random access response to the individual random access preamble, the random access response being transmitted from the base station apparatus, determine whether the random access procedure has been successfully completed based on the information indicating correspondence to the non-contention based random access procedure.
1. A user apparatus that communicates with a base station apparatus, the user apparatus comprising:
a reception unit configured to receive, from the base station apparatus, an indication for an individual random access preamble, information indicating correspondence to a non-contention based random access procedure, and a random access response;
a transmission unit configured to transmit the individual random access preamble to the base station apparatus; and
a control unit configured, in response to receiving the random access response to the individual random access preamble, to determine whether the random access procedure is successfully completed based on the information indicating correspondence to the non-contention based random access procedure, the random access response being transmitted from the base station apparatus,
wherein, in the case where the indication for the individual random access preamble is received, a process for selecting a sub-carrier of the individual random access preamble is changed based on the information indicating correspondence to the non-contention based random access procedure.
2. The user apparatus according to claim 1 , wherein the information indicating correspondence to the non-contention based random access procedure is information transmitted via an individual radio resource control message.
3. The user apparatus according to claim 1 , wherein:
in the case where the information indicating correspondence to the non-contention based random access procedure has been transmitted, a sub-carrier position of the individual random access preamble is obtained by adding the number of sub-carriers used in a contention based random access procedure and a remainder value to an offset position of sub-carriers used in random access, the remainder value being obtained by dividing a preamble index included in the individual random access preamble by a subtracted number, the subtracted number being obtained by subtracting the number of sub-carriers used in the contention based random access procedure from the number of the sub-carriers used in random access; and
in the case where the information indicating correspondence to the non-contention based random access procedure has not been transmitted, the sub-carrier position of the individual random access preamble is obtained by adding a remainder value to the offset position of the sub-carriers used in random access, the remainder value being obtained by dividing a preamble index included in the individual random access preamble by the number of the sub-carriers used in random access.
4. A base station apparatus that communicates with a user apparatus, the base station apparatus comprising:
a transmission unit configured to transmit, to the user apparatus, an indication for an individual random access preamble, information indicating correspondence to a non-contention based random access procedure, and a random access response;
a reception unit configured to receive the individual random access preamble from the user apparatus; and
a setting unit configured to set the information indicating correspondence to the non-contention based random access procedure in a radio resource control message, wherein
the radio resource control message is individually transmitted to the user apparatus, and
in the case where the indication for the individual random access preamble is transmitted, a process for selecting a sub-carrier of the individual random access preamble is changed based on the information indicating correspondence to the non-contention based random access procedure.
5. The user apparatus according to claim 2 , wherein:
in the case where the information indicating correspondence to the non-contention based random access procedure has been transmitted, a sub-carrier position of the individual random access preamble is obtained by adding the number of sub-carriers used in a contention based random access procedure and a remainder value to an offset position of sub-carriers used in random access, the remainder value being obtained by dividing a preamble index included in the individual random access preamble by a subtracted number, the subtracted number being obtained by subtracting the number of sub-carriers used in the contention based random access procedure from the number of the sub-carriers used in random access; and
in the case where the information indicating correspondence to the non-contention based random access procedure has not been transmitted, the sub-carrier position of the individual random access preamble is obtained by adding a remainder value to the offset position of the sub-carriers used in random access, the remainder value being obtained by dividing a preamble index included in the individual random access preamble by the number of the sub-carriers used in random access.