Pilot Frequency Resource Allocation in MU-MIMO Channel Estimation
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Solution Overview
Problem
In LTE and LTE+ technologies, multiple UEs in MU-MIMO mode cannot accurately distinguish specific pilot frequency resources, leading to poor channel estimation performance and incorrect service data retrieval due to the eNodeB only notifying the number of transmission layers, not the specific pilot frequency resources.
Innovation Solution
The method involves allocating and sending pilot frequency resource information to UEs, allowing them to determine their specific pilot frequency resources, thereby improving channel estimation by generating pilot frequency resource information based on the number of space transmission layers and current usage status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the eNodeB only notifies the number of transmission layers, then the signaling overhead is reduced, but the UE cannot determine specific pilot frequency resources leading to poor channel estimation performance
Solution Approach 1:
The patent segments the pilot frequency resource allocation by associating specific pilot frequency resources with specific transmission layers. The eNodeB notifies the UE of both the number of transmission layers and the corresponding pilot frequency resources for each layer, enabling precise channel estimation while maintaining manageable signaling overhead through structured information delivery.
2Reliability
If multiple UEs use the same pilot frequency resources, then the resource utilization is improved, but the specific user channels cannot be distinguished leading to incorrect channel estimation
Solution Approach 1:
The patent applies local quality by assigning different pilot frequency resources to different transmission layers for MU-MIMO UEs. Each UE is notified of the specific pilot frequency resources associated with its assigned transmission layers, allowing accurate channel estimation for each user while efficiently utilizing pilot resources across the system.
Data Source
AI summary
A method and an apparatus for handling data sending and receiving are disclosed by the present invention, where the method for handling data sending includes: allocating the number of space transmission layers and pilot frequency resource for transmission at each transmission layer (101); generating pilot frequency resource information according to the number of space transmission layers and the pilot frequency resource for transmission at each transmission layer (102); and sending the pilot frequency resource information to a UE (103). The embodiments of the present invention can enable the UE to determine the specifically used pilot frequency resources to effectively distinguish the specific user channels, obtain correct channel estimation values, improve the channel estimation performance, and obtain correct service data.