Multibeam Wireless Signaling Overhead Reduction via Grouped Codebooks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multibeam wireless communication systems, existing beam indication methods result in high signaling overhead and latency due to the need to indicate multiple beams, which is particularly problematic as the number of candidate and active beams increases.
Innovation Solution
A beam indication method that groups active beams into subsets and uses a bitmap-based codebook to efficiently represent beam groups, reducing the number of bits required for indication and thus minimizing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple beams are indicated using existing beam indication methods, then the multibeam wireless communication system can support more candidate and active beams, but the signaling overhead and latency increase significantly
Solution Approach 1:
The patent segments the beam indication process by dividing beams into groups and using a two-stage indication mechanism. First, a beam group indicator identifies the selected group, and then a beam indicator within that group identifies the specific beam. This segmentation reduces the total number of bits required compared to indicating each beam independently, as the beam group indicator reuses information from previous indications and the intra-group beam indicator only needs to distinguish within a smaller subset.
Solution Approach 2:
The patent implements a nested structure where beam indicators are nested within beam groups. The beam group indicator operates at a higher level, selecting from multiple groups, while the beam indicator operates at a lower level within the selected group. This nested approach allows the system to indicate multiple beams efficiently by combining the information from both levels, reducing overall signaling overhead while maintaining the ability to support a large number of candidate and active beams.
2Adaptability or versatility
If multiple beams are indicated using existing beam indication methods, then the multibeam wireless communication system can support more candidate and active beams, but the latency increases
Solution Approach 1:
The patent applies preliminary action by pre-grouping beams into beam groups and pre-establishing the beam group indicators. This allows the system to quickly indicate multiple beams without requiring extensive real-time processing and signaling for each individual beam. The pre-organized structure enables faster beam indication and reduces latency, as the beam group indicator can be determined and transmitted more quickly than individual beam indicators would require.
3Quantity of substance
If a compact codebook is used to indicate multiple beams, then the signaling overhead is reduced, but the system must efficiently group and manage beam subsets
Solution Approach 1:
The patent implements universality by designing a beam indication mechanism that can indicate multiple beams using a unified codebook structure. The same beam group indicator and beam indicator framework can indicate different combinations of beams by simply changing the indicator values, rather than requiring separate indication mechanisms for different beam scenarios. This multi-functional approach reduces signaling overhead while the beam grouping management, though added, provides a systematic way to handle complex multibeam indications.
Data Source
AI summary
An aspect of the disclosure includes a beam indication method for a multibeam wireless communication system, including: obtaining a number of candidate beams and a number of active beams to determine a plurality of beam groups, wherein the beam groups are selections of the active beams from the candidate beams; extracting a plurality of sets of the beam groups from the beam groups, wherein the plurality of sets of the beam groups comprises a first beam group set; assigning a first indicator to the first beam group set; assigning a beam indicator to one of the beam groups in the first beam group set to generate a codebook for beam indication according to the first indicator and the beam indicator.