Unlock instant, AI-driven research and patent intelligence for your innovation.

Redistribution method and apparatus of ZC root sequence index

A root sequence index and redistribution technology, applied in the field of communication, can solve the problems of identical and conflicting ZC root sequence indexes

Active Publication Date: 2014-10-29
HUAWEI TECH SERVICE
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the ZC root sequence indexes of adjacent cells are the same and conflict occurs, the embodiment of the present invention provides a ZC root sequence index reallocation method and device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Redistribution method and apparatus of ZC root sequence index
  • Redistribution method and apparatus of ZC root sequence index
  • Redistribution method and apparatus of ZC root sequence index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] see figure 1 , the embodiment of the present invention provides a ZC root sequence index reallocation method, the method process includes:

[0093] Step 101: Obtain restricted neighbors of a target cell, where there are one or more target cells.

[0094] Wherein, the constrained neighboring cells of the target cell include at least one of the following neighboring cells: neighboring cells with the same frequency as the target cell, neighboring cells overlapping with the frequency band of the target cell, and neighboring cells whose distance to the target cell is less than a preset distance area, and an adjacent area whose topological layer number is less than N layers separated from the target cell, where N>0 and N is an integer. The number of topological layers is an ellipse formed by taking the distance R between the target cell and the adjacent cell as the long axis and k*R as the short axis, and the number of cells falling within the ellipse, 0<k<1.

[0095] Step ...

Embodiment 2

[0101] see figure 2 , the embodiment of the present invention provides a ZC root sequence index reallocation method, the method process includes:

[0102] Step 201: Obtain restricted neighbors of a target cell, where there are one or more target cells.

[0103] Wherein, the restricted neighboring cell of the target cell includes at least one of the following neighboring cells: a neighboring cell with the same frequency as the target cell, a neighboring cell overlapping with the frequency band of the target cell, and a neighboring cell whose distance from the target cell is less than a preset distance Neighboring cells and adjacent cells whose topological layers are less than N layers away from the target cell, where N>0 and N is an integer. The number of topological layers is an ellipse formed by taking the distance R between the target cell and the adjacent cell as the long axis and k*R as the short axis, and the number of cells falling within the ellipse, 0<k<1.

[0104] ...

Embodiment 3

[0143] An embodiment of the present invention provides a ZC root sequence index reallocation method. The difference between this embodiment and Embodiment 2 is that (1) the triggering method of acquiring the restricted neighbors of the target cell is different: the acquisition method of the target cell in Embodiment 2 of the present invention is active, and the acquisition of the restricted neighbors of the target cell is active. The region does not need trigger conditions, and the embodiment of the present invention provides a trigger method for obtaining the constrained neighbors of the target cell; (2), before reassigning the ZC root sequence index set for multiple target cells, first determine the reassignment order; (3) Different ways of reassigning the ZC root sequence index set for the target cell; (4) Solving the conflict between the target cell that does not meet the first reassignment condition and its own conflicting cell. see Figure 5 , the method flow includes: ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention, which belongs to the communication field, discloses a redistribution method and apparatus of a Zadoff-Chu (ZC) root sequence index. The method comprises the following steps that: a constrained adjacent cell of a target cell is obtained; a conflicting cell of the target cell is determined, wherein the conflicting cell of the target cell is the constrained adjacent cell of the target cell and the ZC root sequence index set of the target cell is intersected with the ZC root sequence index set of the conflicting cell of the target cell; traversing is carried out on the target cell and if the current target cell meets a first redistribution condition, a ZC root sequence index set is redistributed to the current target cell and conflicting cells of all target cells are determined again, wherein the first redistribution condition is that a conflicting cell exists in the target cell and the redistributed ZC root sequence index set of the target cell is not intersected with ZC root sequence index sets of all constrained adjacent cells of the target cell after redistribution. The apparatus consists of an obtaining module, a determination module and a redistribution module. According to the invention, redistribution of the ZC root sequence index sets can be realized; and the interference between cells can be eliminated.

Description

technical field [0001] The invention relates to the communication field, in particular to a ZC root sequence index reallocation method and device. Background technique [0002] In the LTE (Long-Term Evolution) system, in order to establish communication with the cell, UE (User Equipment) in the cell needs to send a Preamble (preamble) sequence to the cell for RA (Random Access, random access) attempt . [0003] Wherein, the Preamble sequence is generated by the UE according to the ZC (Zadoff-Chu) root sequence index configured by the cell broadcast by the cell. Specifically, the UE obtains the ZC root sequence according to the ZC root sequence index and the inherent formula, and then cyclically shifts the ZC root sequence according to certain rules to generate a corresponding Preamble sequence. It can be seen from the above that if two adjacent cells are configured with the same ZC root sequence index, when the UE located in the overlapping range of the two cells is perfor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/12
Inventor 王学华武秀
Owner HUAWEI TECH SERVICE