Reference Signal Sequence Configuration for CoMP and MU-MIMO
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for generating reference signal sequences in LTE-A networks are limited, particularly in selecting IDs for initialization sequences, which can lead to performance issues in CoMP and MU-MIMO scenarios due to limited scrambling ID options.
Innovation Solution
A method that selects an ID from candidate IDs, excluding scrambling IDs, to generate a reference signal initialization sequence, allowing for expanded scrambling ID options and improved sequence configuration, enabling better performance in CoMP and MU-MIMO environments by using formulas like c_init = ⌊n s / 2⌋ + 1 ⋅ 2 N ID + 1 ⋅ 2 16 + n SCID, where n s is a time slot number and n SCID is a scrambling ID.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scrambling IDs are used to generate reference signal initialization sequences, then sequence diversity is provided, but the number of available IDs is limited which restricts system capacity
Solution Approach 1:
The patent segments the ID selection process by introducing a separate first ID (non-scrambling ID) that is independently selected from candidate IDs. This first ID is used specifically for generating the reference signal initialization sequence, while scrambling IDs are used separately for scrambling operations. This segmentation allows the system to expand the total number of available IDs without compromising sequence diversity.
Solution Approach 2:
The patent adds another dimension to the ID selection space by introducing first IDs that are distinct from scrambling IDs. Instead of relying solely on the limited scrambling ID space, the system now operates in an expanded dimensional space that includes both first IDs and scrambling IDs, thereby increasing the total number of available identifiers while maintaining sequence diversity.
2Ease of manufacture
If only scrambling IDs are used for reference signal initialization, then the generation process is simple, but system capacity and flexibility are limited
Solution Approach 1:
The patent divides the ID selection process into two independent segments: selecting a first ID from candidate IDs for initialization sequence generation, and selecting a scrambling ID for scrambling operations. This segmentation maintains the simplicity of the generation process while expanding system capacity, as each segment operates independently with its own pool of available IDs.
Solution Approach 2:
The patent makes the ID selection mechanism universal by allowing the first ID to be selected from a broader set of candidate IDs that are not restricted to scrambling IDs. This multi-functional approach enables the same initialization sequence generation process to work with a larger variety of ID types, thereby increasing system capacity without complicating the generation process.
3Device complexity
If the same ID is used for both initialization sequence generation and scrambling, then the process is simplified, but orthogonality between CoMP and non-CoMP terminals cannot be ensured
Solution Approach 1:
The patent segments the identifier usage into distinct functional roles: first IDs are used for initialization sequence generation while scrambling IDs are used for scrambling operations. This segmentation ensures that CoMP and non-CoMP terminals can be assigned different first IDs, guaranteeing orthogonality of their reference signals, while maintaining separate scrambling ID selection for additional diversity.
Solution Approach 2:
The patent introduces another dimension to the orthogonality mechanism by using first IDs as an additional layer of differentiation beyond scrambling IDs. This dimensional expansion allows the system to ensure orthogonality between CoMP and non-CoMP terminals through the first ID selection, while scrambling IDs provide an independent layer of sequence differentiation.
Data Source
Figure 1~3
Figure 4~5
Figure 6a~6b
AI summary
An implementation manner of the present invention provides a reference signal sequence configuration method. The method includes: selecting, by a network device and from candidate IDs, an ID used for generating a reference signal initialization sequence for a terminal, where the candidate IDs include at least two IDs, and the selected ID does not include a scrambling ID; and generating a reference signal initialization sequence for the terminal according to the selected ID. An implementation manner of the present invention further provides a network device. In the reference signal sequence configuration method and the network device, an ID used for generating a reference signal initialization sequence is selected from at least two candidate IDs, where the selected ID does not include a scrambling ID, and a reference signal initialization sequence is generated according to the selected ID, thereby providing a manner of generating a reference signal initialization sequence different from the manner in the prior art.