LTE Shared Channel Precoding Resource Block Group Processing
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Solution Overview
Problem
In wireless communication systems, particularly in LTE networks, there is a challenge in efficiently processing control and shared channels due to the assumption that their characteristics may not be the same, leading to increased processing complexity and potential performance issues in channel estimation and decoding.
Innovation Solution
The method involves determining whether the control channel and shared channel are quasi co-located and using the same precoding across resource blocks belonging to the same precoding resource block group, allowing for shared processing and improved channel estimation and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate processing is performed for control channel and shared channel assuming different characteristics, then processing accuracy may be maintained, but processing complexity and time consumption increase
Solution Approach 1:
The patent merges the processing of control channel and shared channel by determining that they are quasi co-located and can use the same precoding matrix. This allows the receiver to process both channels together using a single channel estimation and precoding matrix determination, rather than treating them as completely separate entities requiring independent processing chains.
Solution Approach 2:
The patent applies universality by using the same precoding matrix for both control channel and shared channel within a precoding resource block group. The channel estimation process becomes multi-functional, serving both channel types simultaneously when quasi co-location is detected, reducing the need for separate processing algorithms.
2Reliability
If separate processing is performed for control channel and shared channel, then channel-specific optimization may be achieved, but processing time increases
Solution Approach 1:
The patent performs preliminary determination of quasi co-location status between control and shared channels before full processing. By checking resource block group alignment and precoding configuration in advance, the system can quickly decide whether to use unified processing, avoiding time-consuming separate processing when conditions allow for optimization.
Solution Approach 2:
The patent introduces dynamic processing where the system adapts between separate and unified processing modes based on detected conditions. When control and shared channels are determined to be quasi co-located, the system dynamically switches to unified processing; otherwise, it maintains separate processing, allowing flexible adaptation to different channel conditions.
3Productivity
If unified processing is used for control channel and shared channel assuming same characteristics, then processing efficiency increases, but applicability to different channel types is limited
Solution Approach 1:
The patent applies local quality by using unified processing only at the precoding resource block group level where control and shared channels overlap, rather than forcing unified processing across all channel types and all resource blocks. This allows localized optimization where applicable while maintaining separate processing elsewhere.
Solution Approach 2:
The patent implements a dynamic processing framework that adapts the degree of unification based on channel characteristics. The system determines quasi co-location status and adjusts processing unity accordingly, maintaining versatility to handle both unified and separate processing scenarios as conditions require.
Data Source
AI summary
Certain aspects provide methods and apparatus for wireless communications. One example method generally includes receiving a shared channel within a subframe, determining the same precoding may be used across resource blocks belonging to the same precoding resource block group (PRG) of the shared channel, and processing the shared channel based on the determination.