Method and apparatus for allocating and processing sequences in communication system

• US 10,389,468 B2
• Filed: 11/09/2017
• Issued: 08/20/2019
• Est. Priority Date: 03/07/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Qu, Bingyu, He, Yujuan, Feng, Xuan
• Primary Examiner(s): Wong, Warner
• Application Number:
  US15/807,774
• Publication Number:
  US 20180069647A1
• Time in Patent Office: 649 Days
• Field of Search: 370203, 370204, 370329, 370330, 370343, 370344, 370464-465, 375259, 375260, 375267, 375285, 375295, 375296, 375364, 375365, 375366, 375368
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04J 13/0059 CAZAC [constant-amplitude and zero auto-correlation]
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04J 13/22 Allocation of codes with a zero correlation zone
• CPC Class Codes: H04L 23/02 adapted for orthogonal signalling
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

A method and apparatus for allocating and processing sequences in a communication system is disclosed. The method includes: dividing sequences in a sequence group into multiple sub-groups, each sub-group corresponding to its own mode of occupying time frequency resources; selecting sequences from a candidate sequence collection corresponding to each sub-group to form the sequences in the sub-group by: the sequences in a sub-group i in a sequence group k being composed of n sequences in the candidate sequence collection, the n sequences making a |r_i/N_i−c_k/N_p1| or |(r_i/N_i−c_k/N_p1) modu m_k,i| function value the smallest, second smallest, till the n^th smallest respectively; allocating the sequence group to cells, users or channels. It prevents the sequences highly correlated with the sequences of a specific length from appearing in other sequence groups, thus reducing interference, avoiding the trouble of storing the lists of massive sequence groups.

Claims

1. An apparatus, comprising:

a processor coupled with a non-transitory storage medium storing executable instructions;

wherein the executable instructions, when executed by the processor, cause the apparatus to;

determine a sequence index r_i based on a group number k, wherein the sequence index r_i is determined using the relation

2. The apparatus of claim 1, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

3. The apparatus of claim 1, wherein the executable instructions, when executed by the processor, cause the apparatus to determine the sequence index r_i in a following manner:

determining the sequence index r_i by rounding down the

4. The apparatus of claim 3, wherein the executable instructions, when executed by the processor, cause the apparatus further to:

generate a second r_i value by rounding up the

5. The apparatus of claim 1, wherein the executable instructions, when executed by the processor, cause the apparatus to determine the sequence index r_i in a following manner:

determining the sequence index r_i by rounding up the

6. The apparatus of claim 5, wherein the executable instructions, when executed by the processor, cause the apparatus further to:

generate a second r_i value by rounding down the

7. The apparatus of claim 1, wherein N₁ is 31.

8. An apparatus, comprising:

a processor coupled with a non-transitory storage medium storing executable instructions;

wherein the executable instructions, when executed by the processor, cause the apparatus to;

obtain a sequence index r_i based on a group number k, wherein the sequence index r_i satisfies with

9. The apparatus of claim 8, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

10. An apparatus, comprising:

a processor coupled with a non-transitory storage medium storing executable instructions;

wherein the executable instructions, when executed by the processor, cause the apparatus to;

obtain a sequence index r_i based on a group number k, wherein a value of the sequence index r_i minimizes |r_i/N_i−

k/N₁|, wherein N_i is a length of a Zadoff-Chu sequence member in a Zadoff-Chu sequence group, N₁ is a reference length, the length of the Zadoff-Chu sequence member is a prime number less than a reference signal sequence length, and the group number k is an index of a sequence group;

generate a reference signal sequence with the reference signal sequence length based on the sequence index r_i; and

transmit the reference signal sequence.

11. The apparatus of claim 10, wherein N₁ is 31.

12. The apparatus of claim 11, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

13. A non-transitory computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out steps of:

determining a sequence index r_i based on a group number k, wherein the sequence index r_i is determined using the relation

14. The non-transitory computer-readable storage medium of claim 13, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

15. The non-transitory computer-readable storage medium of claim 13, wherein the instructions which, when executed by a computer, cause the computer to carry out steps of determining the sequence index r_i in a following manner:

determining the sequence index r_i by rounding down the

16. The non-transitory computer-readable storage medium of claim 15, wherein the instructions which, when executed by a computer, further cause the computer to carry out steps of:

generating a second r_i value by rounding up the

17. The non-transitory computer-readable storage medium of claim 13, wherein the instructions which, when executed by a computer, cause the computer to carry out steps of determining the sequence index r_i in a following manner:

determining the sequence index r_i by rounding up the

18. The non-transitory computer-readable storage medium of claim 17, wherein the instructions which, when executed by a computer, further cause the computer to carry out steps of:

generating a second r₁ value by rounding down the

19. The non-transitory computer-readable storage medium of claim 13, wherein N₁ is 31.

20. A non-transitory computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out steps of:

obtaining a sequence index r₁ based on a group number k, wherein the sequence index r_i satisfies with

21. The non-transitory computer-readable storage medium of claim 20, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

22. A non-transitory computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out steps of:

obtaining a sequence index r_i based on a group number k, wherein a value of the sequence index r_i minimizes |r_i/N_i−

k/N₁|, wherein N_i is a length of a Zadoff-Chu sequence member in a Zadoff-Chu sequence group, N₁ is a reference length, the length of the Zadoff-Chu sequence member is a prime number less than a reference signal sequence length, and the group number k is an index of a sequence group;

generating a reference signal sequence with the reference signal sequence length based on the sequence index r_i; and

transmitting the reference signal sequence.

23. The non-transitory computer-readable storage medium of claim 22, wherein N₁ is 31.

24. The non-transitory computer-readable storage medium of claim 23, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.