Integrated circuit for random access method and apparatus

1. An integrated circuit for controlling a process comprising:

receiving control information;

grouping a predetermined number of sequences that are generated from a plurality of base sequences into a plurality of groups, which are respectively associated with different amounts of data or reception qualities, by partitioning the predetermined number of sequences, in which sequences generated from the same base sequence and having different cyclic shifts are arranged in an increasing order of the cyclic shifts; and

randomly selecting a sequence from a plurality of sequences contained in one group of the plurality of groups,

wherein a position at which the predetermined number of sequences are partitioned is determined based on the control information, and a number of sequences contained in each of the plurality of groups varies in accordance with the control information.

2. The integrated circuit according to claim 1 , the process further comprises transmitting the selected sequence.

3. The integrated circuit according to claim 2 , wherein the selected sequence is transmitted on a random access channel.

4. The integrated circuit according to claim 1 , wherein the number of sequences contained in each of the plurality of groups is different.

5. The integrated circuit according to claim 1 , wherein the predetermined number of sequences are grouped by partitioning the predetermined number of sequences, which are arranged in an increasing order of sequence indices of the base sequences.

6. The integrated circuit according to claim 1 , wherein one group associated with one of the different amounts of data or reception qualities is comprised of all of sequences that are generated from at least one of the base sequences.

7. The integrated circuit according to claim 1 , wherein one group associated with one of the different amounts of data or reception qualities is comprised only of sequences that are generated from at least one of the base sequences.

8. The integrated circuit according to claim 1 , wherein a group associated with the amount of data or reception quality with higher probability of occurrence is comprised of a greater number of sequences.

9. The integrated circuit according to claim 1 , wherein the number of the sequences contained in each of the plurality of groups varies in accordance with probability of occurrence of the amount of data or reception quality.

10. The integrated circuit according to claim 1 , wherein the base sequence is a Generalized Chirp-like (GCL) sequence.

11. A process implemented using a integrated circuit comprising:

receiving control information;

grouping a predetermined number of sequences that are generated from a plurality of base sequences into a plurality of groups, which are respectively associated with different amounts of data or reception qualities, by partitioning the predetermined number of sequences, in which sequences generated from the same base sequence and having different cyclic shifts are arranged in an increasing order of the cyclic shifts; and

randomly selecting a sequence from a plurality of sequences contained in one group of the plurality of groups,

wherein a position at which the predetermined number of sequences are partitioned is determined based on the control information, and a number of sequences contained in each of the plurality of groups varies in accordance with the control information.

12. The integrated circuit according to claim 11 , the process further comprises transmitting the selected sequence on a random access channel.

13. The integrated circuit according to claim 11 , wherein the number of sequences contained in each of the plurality of groups is different.

14. The integrated circuit according to claim 11 , wherein the predetermined number of sequences are grouped by partitioning the predetermined number of sequences, which are arranged in an increasing order of sequence indices of the base sequences.

15. The integrated circuit according to claim 11 , wherein one group associated with one of the different amounts of data or reception qualities is comprised of all of sequences that are generated from at least one of the base sequences.

16. The integrated circuit according to claim 11 , wherein one group associated with one of the different amounts of data or reception qualities is comprised only of sequences that are generated from at least one of the base sequences.

17. The integrated circuit according to claim 11 , wherein a group associated with the amount of data or reception quality with higher probability of occurrence is comprised of a greater number of sequences.

18. The integrated circuit according to claim 11 , wherein the number of the sequences contained in each of the plurality of groups varies in accordance with probability of occurrence of the amount of data or reception quality.

19. Integrated circuitry comprising:

a receiver configured to receive control information;

data processing circuitry configured to:

group a predetermined number of sequences that are generated from a plurality of base sequences into a plurality of groups, which are respectively associated with different amounts of data or reception qualities, by partitioning the predetermined number of sequences, in which sequences generated from the same base sequence and having different cyclic shifts are arranged in an increasing order of the cyclic shifts; and

randomly select a sequence from a plurality of sequences contained in one group of the plurality of groups,

wherein a position at which the predetermined number of sequences are partitioned is determined based on the control information, and a number of sequences contained in each of the plurality of groups varies in accordance with the control information.