MU-MIMO Receiver Signaling for Port Interference Detection
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Solution Overview
Problem
Existing MU-MIMO systems face challenges in efficiently signaling interference parameters to UEs, leading to suboptimal performance due to the need for blind detection and significant signaling overhead, especially in dynamic scenarios where interference parameters change frequently.
Innovation Solution
Implement efficient signaling methods, including RRC-based configuration of port sets and dynamic indication via DCI, using CI-RNTI and set indexing, to minimize blind detection and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blind detection is used for interference parameter detection, then the receiver can operate without prior interference information, but the detection accuracy deteriorates and computational complexity increases
Solution Approach 1:
The network performs preliminary action by pre-configuring multiple interference parameter sets (first set, second set, etc.) and indicating which set to use via DCI signaling. This eliminates the need for blind detection at the receiver while maintaining adaptability to changing interference conditions.
Solution Approach 2:
The patent introduces an intermediary signaling mechanism (DCI with interference parameter set indication) that mediates between the network's interference knowledge and the receiver's detection needs. This intermediary provides the receiver with precise interference parameter information without requiring complex blind detection algorithms.
2Measurement precision
If detailed interference parameters are signaled to UEs, then interference detection accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent segments interference parameter information into multiple distinct sets (first set, second set, third set, etc.), each containing specific parameters like scrambled CRC, number of interfered ports, and set index. The network signals only the relevant set index rather than all possible parameters, reducing overhead while maintaining detection accuracy.
Solution Approach 2:
The patent applies partial action by signaling only the necessary interference parameter set index rather than complete interference parameter details. The UE can then determine the actual interference parameters from the indicated set, achieving accurate detection with minimal signaling overhead.
3Adaptability or versatility
If multiple interference parameter sets are configured, then adaptability to changing interference conditions improves, but system complexity increases
Solution Approach 1:
The network performs preliminary organization of interference parameters into multiple pre-defined sets, each suitable for different interference scenarios. This preliminary structuring enables fast adaptation to changing conditions through simple set selection via DCI signaling, avoiding complex real-time parameter management at the UE.
Solution Approach 2:
The patent implements dynamic adaptability by allowing the network to indicate different interference parameter sets through DCI signaling based on current interference conditions. The UE dynamically switches between pre-configured sets without complex processing, achieving adaptability with minimal complexity.
Data Source
AI summary
An apparatus may be configured to: receive, from a network, an indication of one or more sets of ports, wherein the one or more sets of ports are grouped; receive, from the network, at least one parameter for port interference detection, wherein the at least one parameter for port interference detection comprises at least one of: a scrambled cyclic redundancy code, a number of interfered ports, a set index for a set of at least one of the one or more sets of ports, or an indication of a selected set of the one or more sets of ports; and determine the set of at least one of the one or more sets of ports based, at least partially, on the at least one parameter for port interference detection.