Method and apparatus for sequence distributing and sequence processing in communication system

• US 9,294,245 B2
• Filed: 03/27/2009
• Issued: 03/22/2016
• Est. Priority Date: 09/30/2006
• 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
• Primary Examiner(s): Sternbane, Larry
• Application Number:
  US12/413,105
• Publication Number:
  US 20090186625A1
• Time in Patent Office: 2,552 Days
• Field of Search: 370/330, 370/436, 455/450
• US Class Current: 1/1
• 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 5/0005 Time-frequency
• 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: H04W 88/02 Terminal devices

Abstract

A sequence distributing and sequence processing method and apparatus in a communication system are provided. The sequence distributing method includes the following steps: generating sequence groups including a number of sequences, the sequences in the sequence groups are determined according to the sequence time frequency resource occupation manner which is supported by the system; distributing the sequence groups to cells. The method avoids the phenomenon that signaling transmission is needed to distribute the sequences to the cells for different time frequency resource occupation manner, and saves in so far as possible the wireless network transmission resource occupied during the process of distributing the sequences through distributing the sequence groups comprising a number of sequences to the cells.

Claims

1. A method for allocating sequences in a communication system that includes a network entity and at least one cell, comprising:

determining, by the network entity, a sequence group comprising a plurality of sequences, wherein the sequences in the sequence group correspond to occupation modes of time-frequency resources supported in the system; and

allocating the sequence group to the at least one cell,

wherein a sequence for use by a network side equipment, which the cell belongs to, or a user equipment in communication with the network side equipment is determined from the sequence group according to an occupation mode of the time-frequency resources of the network side equipment or the user equipment;

wherein the sequences in the sequence group correspond to occupation modes of time-frequency resources in one or more of the following manners;

different sequences correspond to the time-frequency resources having different bandwidths;

different sequences correspond to the time-frequency resources having different sampling intervals; and

different sequences correspond to different positions of time-frequency resource blocks;

wherein the sequences in the sequence group comprises one or more of the following;

a constant amplitude zero auto-correlation (CAZAC) sequence, a fragment of a CAZAC sequence, and a sequence obtained through combining a CAZAC sequence with a segment of a CAZAC sequence;

wherein the CAZAC sequence is a Zadoff-Chu sequence;

wherein when the sequences in the sequence group correspond to the occupation modes of the time-frequency resources in the manner of different sequences correspond to the time-frequency resources having different bandwidths, two sequences occupying the time-frequency resources having different bandwidths are taken as two of the sequences in the sequence group;

wherein indexes r_i of the two sequences comply with r_i=b_i·

k+δ

_i,i=1,2;

wherein when k is the same, the two sequences belong to a same sequence group, b_i, δ

_i are determined by the time-frequency resources having different bandwidths, and i=1, 2 differentiates the time-frequency resources having different bandwidths.

2. The method according to claim 1, wherein b₁, b₂ comply with an equation b₁, N₂−

b₂·

N₁=1, where N₁, N₂ represents lengths of the two sequences respectively.

3. The method according to claim 1, wherein a sequence in the sequence group has a higher correlation with other sequences in the sequence group than with sequences outside the sequence group.

4. The method according to claim 1, wherein the allocating the sequence group to the at least one cell comprises:

allocating the sequence group to the cell in a pseudo random mode.

5. A method for sequence processing in a communication system that includes a network side equipment and at least a user equipment (UE) in communication with the network side equipment, wherein a cell belongs to the network side equipment, the method comprising:

determining, by the UE, a sequence group comprising a plurality of sequences allocated to the cell;

wherein the plurality of sequences in the sequence group correspond to occupation modes of time-frequency resources supported in the system;

determining from the sequence group a sequence to be processed according to an occupation mode of time-frequency resources of the UE or the network side equipment;

generating the sequence; and

performing the sequence processing on the generated sequence;

wherein the sequences in the sequence group correspond to occupation modes of time-frequency resources in one or more of the following manners;

different sequences correspond to the time-frequency resources having different bandwidths;

different sequences correspond to the time-frequency resources having different sampling intervals; and

different sequences correspond to different positions of time-frequency resource blocks;

wherein the sequences in the sequence group comprises one or more of the following;

a constant amplitude zero auto-correlation (CAZAC) sequence, a fragment of a CAZAC sequence, and a sequence obtained through combining a CAZAC sequence with a segment of a CAZAC sequence;

wherein the CAZAC sequence is a Zadoff-Chu sequence;

wherein when the sequences in the sequence group correspond to the occupation modes of the time-frequency resources in the manner of different sequences correspond to the time-frequency resources having different bandwidths, two sequences occupying the time-frequency resources having different bandwidths are taken as two of the sequences in the sequence group;

wherein indexes r_i of the two sequences comply with r_i=b_i·

k+δ

_i,i=1,2;

wherein when k is the same, the two sequences belong to a same sequence group, b_i, δ

_i are determined b the time-frequency resources having different bandwidths, and i=1, 2 differentiates the time-frequency resources having different bandwidths.

6. The method according to claim 5, wherein the determining the sequence group comprising a plurality of sequences allocated to the cell comprises:

determining the sequence group allocated to the cell according to identification information of the cell and/or identification information of the sequence group.

7. The method according to claim 5, wherein b₁ and b₂ comply with an equation b₁·

N₂−

b₂·

N₁=1, where N₁ and N₂ represents lengths of the two sequences respectively.

8. The method according to claim 5, wherein a sequence in the sequence group has a higher correlation with other sequences in the sequence group than with sequences outside the sequence group.

9. A wireless communication apparatus for signal processing in a communication system that includes a network side equipment and at least a user equipment (UE) in communication with the network side equipment, wherein a cell belongs to the network side equipment, and wherein the communication apparatus is the UE, the apparatus comprises:

a processor and a memory;

wherein the processor is configured to execute software units stored in the memory;

wherein the software units stored in the memory comprise;

a cell sequence determining unit, configured to cause the processor to determine a sequence group comprising a plurality of sequences allocated to the cell;

wherein the plurality of sequences in the sequence group correspond to occupation modes of time-frequency resources supported in the system;

a time-frequency resource sequence determining unit, configured to cause the processor to determine from the sequence group a sequence to be processed according to an occupation mode of time-frequency resources of the UE or the network side equipment;

a sequence generating unit, configured to cause the processor to generate the sequence; and

a processing unit, configured to cause the processor to perform the sequence processing on the generated sequence;

wherein the sequences in the sequence group correspond to occupation modes of time-frequency resources in one or more of the following manners;

different sequences correspond to the time-frequency resources having different bandwidths;

different sequences correspond to the time-frequency resources having different sampling intervals; and

different sequences correspond to different positions of time-frequency resource blocks;

wherein the sequences in the sequence group comprises one or more of the following;

a constant amplitude zero auto-correlation (CAZAC) sequence, a fragment of a CAZAC sequence, and a sequence obtained through combining a CAZAC sequence with a segment of a CAZAC sequence;

wherein the CAZAC sequence is a Zadoff-Chu sequence;

wherein when the sequences in the sequence group correspond to the occupation modes of the time-frequency resources in the manner of different sequences correspond to the time-frequency resources having different bandwidths, two sequences occupying the time-frequency resources having different bandwidths are taken as two of the sequences in the sequence group;

wherein indexes r_i of the two sequences comply with r_i=b_i·

k+δ

_i,i=1,2;

wherein when k is the same, the two sequences belong to a same sequence group, b_i, δ

_i are determined b the time-frequency resources having different bandwidths, and i=1, 2 differentiates the time-frequency resources having different bandwidths.

10. The apparatus according to claim 9, wherein the cell sequence determining unit is further configured to determine the sequence group allocated to the cell according to identification information of the cell and/or identification information of the sequence group.

11. The apparatus according to claim 9, wherein b₁ and b₂ comply with an equation b₁·

N₂b₂·

N₁=1, where N₁ and N₂ represents lengths of the two sequences respectively.

12. The apparatus according to claim 9, wherein a sequence in the sequence group has a higher correlation with other sequences in the sequence group than with sequences outside the sequence group.