Method and apparatus for allocating and processing sequences in communication system

• US 9,819,434 B2
• Filed: 09/01/2015
• Issued: 11/14/2017
• 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:
  US14/842,618
• Publication Number:
  US 20150372780A1
• Time in Patent Office: 805 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. A method, comprising:

determining, by the terminal device, a sequence index r_i according to a group number k, wherein the sequence index r_i is determined using the relation

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

3. Method of claim 2, wherein the determining step further comprises determining the sequence index r_i by rounding down the

4. Method of claim 2, wherein the determining step further comprises determining the sequence index r_i by rounding up the

5. Method of claim 4, wherein the terminal device generates a second r_i value by rounding down the

6. Method of claim 3, wherein the terminal device generates a second r_i value by rounding up the

7. The method according to claim 1, wherein N₁ is 31.

8. A terminal device, comprising:

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

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

obtain a sequence index r_i according to a group number k, wherein the sequence index r_i is determined using the relation

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

10. The device of claim 8, wherein the executable instructions, when executed by the processor, cause the terminal device to determine the sequence index r_i by rounding down the

11. The device of claim 8, wherein the executable instructions, when executed by the processor, cause the terminal device to determine the sequence index r_i by rounding up the

12. The device of claim 11, wherein the executable instructions, when executed by the processor, cause the terminal device further to generate a second r_i value by rounding down the

13. The device of claim 10, wherein the executable instructions, when executed by the processor, cause the terminal device further to generate a second r_i ri value by rounding up the

14. The method according to claim 9, wherein N₁ is 31.

15. A method, comprising:

obtaining, by a terminal device, a group number k of a sequence group;

obtaining, by the terminal device, a sequence index r_i according to the group number k, wherein the sequence index r_i satisfies with

16. The method of claim 15, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

17. A terminal device, comprising:

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

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

obtain a group number k of a sequence group;

obtain a sequence index r_i according to the group number k, wherein the sequence index r_i satisfies with

18. The terminal device of claim 17, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

19. A method, comprising:

obtaining, by a terminal device, a group number k of a sequence group;

obtaining, by the terminal device, a sequence index r_i according to the 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 the Zadoff-Chu sequence group;

generating, by the terminal device, a reference signal sequence according to the sequence index r_i; and

transmitting, by the terminal device to a base station, the reference signal sequence.

20. The method according to claim 19, wherein N₁ is 31.

21. The method of claim 19, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.

22. A terminal device, comprising:

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

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

obtain a group number k of a sequence group;

obtain a sequence index r_i according to the 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 the Zadoff-Chu sequence group;

generate the reference signal sequence according to the sequence index r_i; and

transmit the reference signal sequence to a base station.

23. The terminal device according to claim 22, wherein N₁ is 31.

24. The terminal device of claim 22, wherein the prime number is the largest prime number smaller than the value of the reference signal sequence length.