Sequence report method and sequence report device

• US 8,085,724 B2
• Filed: 03/18/2008
• Issued: 12/27/2011
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Imamura, Daichi, Iwai, Takashi, Inogai, Kazunori, Futagi, Sadaki, Matsumoto, Atsushi
• Primary Examiner(s): LIN, KENNY S
• Application Number:
  US12/531,864
• Publication Number:
  US 20100113046A1
• Time in Patent Office: 1,379 Days
• Field of Search: 370/329, 370/330
• US Class Current: 370/329
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04J 13/0066 GCL [generalized chirp-like] sequences
• CPC Class Codes: H04J 13/22 Allocation of codes with a zero correlation zone
• CPC Class Codes: H04J 2013/0096 Network synchronisation
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

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.

Claims

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.