UE MIMO Stream Interference Feedback for Network Resource Allocation
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Solution Overview
Problem
In wireless communication systems, network nodes lack information about a UE's ability to mitigate multi-antenna inter-stream interference, leading to inefficient use of radio resources and potential communication losses.
Innovation Solution
A method where the UE determines and transmits information about the number of multi-antenna streams it can mitigate, allowing network nodes to configure radio resources more efficiently and adapt transmissions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network nodes transmit using multiple multi-antenna streams to increase data capacity, then spectral efficiency is improved, but interference mitigation performance deteriorates when UE capability is unknown
Solution Approach 1:
The UE determines its interference mitigation capability and feeds back this information to the network node. The feedback includes the maximum number of multi-antenna streams whose interference the UE can mitigate, enabling the network to adapt transmission configurations accordingly.
Solution Approach 2:
The network node dynamically adjusts the number of multi-antenna streams and transmission configurations based on the UE's reported interference mitigation capability. This allows the system to optimize between spectral efficiency and reliability according to actual UE conditions.
2Adaptability or versatility
If network nodes allocate radio resources without UE capability information, then resource allocation flexibility is maintained, but communication losses increase
Solution Approach 1:
The UE provides feedback information about its interference mitigation capability, enabling the network node to make informed resource allocation decisions that reduce communication losses while maintaining flexibility.
Solution Approach 2:
The network node changes transmission parameters such as the number of active streams, modulation order, and coding rate based on the UE's reported capability, thereby optimizing resource utilization and reducing communication losses.
3Reliability
If UEs implement complex interference mitigation techniques for all streams, then interference cancellation performance is improved, but device complexity increases
Solution Approach 1:
The UE reports the maximum number of streams it can mitigate, allowing the network to configure transmissions where the UE applies interference mitigation only to a manageable subset of streams, balancing performance with complexity constraints.
Solution Approach 2:
The network node adjusts transmission parameters including the number of streams, modulation schemes, and coding rates to match the UE's interference mitigation capability, thereby achieving reliable communication without requiring the UE to implement overly complex mitigation techniques for all streams.
Data Source
AI summary
A first user equipment is configured to mitigate multi-antenna inter-stream interference. A method by the first UE includes determining, based on one or more criteria, a number of multi-antenna streams whose interference can be currently mitigated by the first UE, and transmitting information based on the number of multi-antenna streams to a first network node, to a second network node, and/or to a second UE. A related method by a first network node serving or managing the first UE includes obtaining information based on a number of multi-antenna streams whose interference can be currently mitigated by a first UE at the first UE, and performing one or more radio operational tasks using the information based on the number of multi-antenna streams whose interference can be currently mitigated.