Sequence report method and sequence report device
View Patent ↗Disclosed are a sequence report method and a sequence report device for reducing a signaling amount for reporting a Zadoff-Chu sequence or a GCL sequence allocated for a cell. Indexes starting at 1 are correlated to different ZC sequences and are allocated for cells so that the indexes are continuous. When such ZC sequences are reported from BS to UE, a start index indicating the start of the continuous indexes is combined with the number of allocated sequences and they are reported as allocation sequence information by a report channel. The UE and the BS share the correlation between the ZC sequences and the indexes and the UE identifies a usable sequence number according to the correlation and the allocation sequence information reported from the BS.
1. A sequence reporting apparatus comprising:
an allocating section configured to allocate at least one of sequences with consecutive indices among a plurality of sequences, which are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, a cyclic shift amount corresponding to a Doppler shift according to a sequence number; and
a reporting section configured to report the index of the allocated sequence.
2. The sequence reporting apparatus according to claim 1 , wherein the cyclic shift amount corresponding to the Doppler shift is a cyclic shift amount corresponding to a Doppler shift for a mobile station moving at high speed.
3. The sequence reporting apparatus according to claim 1 , wherein the cyclic shift amount depends on the sequence number.
4. The sequence reporting apparatus according to claim 1 , wherein the plurality of sequences are indexed by the indices having consecutive numbers in the sequence number order of a and N−a, wherein N is a sequence length and a is an integer whose value ranges between 1 and N−1.
5. The sequence reporting apparatus according to claim 4 , wherein the plurality of sequences are indexed by the indices having consecutive numbers in the sequence number order of a and N−a, and wherein the integers a are not in consecutive order.
6. The sequence reporting apparatus according to claim 1 , wherein the plurality of sequences are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, an available cell radius.
7. The sequence reporting apparatus according to claim 1 , wherein the plurality of sequences are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, a cell radius for a mobile station moving at high speed.
8. The sequence reporting apparatus according to claim 1 , wherein said reporting section is configured to report a required cyclic shift amount.
9. The sequence reporting apparatus according to claim 1 , wherein the sequence is a Zadoff-Chu sequence.
10. The sequence reporting apparatus according to claim 1 , wherein a random access preamble is generated from the sequence.
11. The sequence reporting apparatus according to claim 1 , wherein said reporting section is configured to broadcast the index of the allocated sequence.
12. A sequence reporting apparatus comprising:
an allocating section configured to allocate at least one of sequences with consecutive indices among a plurality of sequences, which are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, a required cyclic shift amount according to a sequence number; and
a reporting section configured to report the index of the allocated sequence.
13. The sequence reporting apparatus according to claim 12 , wherein the required cyclic shift amount is a required cyclic shift amount for a mobile station moving at high speed.
14. The sequence reporting apparatus according to claim 12 , wherein the required cyclic shift amount is equal to or less than a cyclic shift amount corresponding to a Doppler shift.
15. The sequence reporting apparatus according to claim 12 , wherein the required cyclic shift amount is a maximum cyclic shift amount that is equal to or less than a cyclic shift amount corresponding to a Doppler shift.
16. The sequence reporting apparatus according to claim 12 , wherein the required cyclic shift amount is a maximum cyclic shift amount available for a Doppler shift.
17. A sequence reporting method comprising:
allocating at least one of sequences with consecutive indices among a plurality of sequences, which are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, a cyclic shift amount corresponding to a Doppler shift according to a sequence number; and
reporting the index of the allocated sequence.
18. A sequence reporting method comprising:
allocating at least one of sequences with consecutive indices among a plurality of sequences, which are indexed by the indices having consecutive numbers in order of generally increasing to a maximum value and then decreasing, from the maximum value, a required cyclic shift amount according to a sequence number; and
reporting the index of the allocated sequence.