Network Signaling for UE Co-Channel Interference Cancellation
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Solution Overview
Problem
Co-channel interference in cellular networks is exacerbated by the deployment of low-power small-form-factor base stations, leading to significant inter-cell and intra-cell interference, which existing UE receivers struggle to mitigate effectively due to lack of coordinated interference information.
Innovation Solution
A cellular network system that identifies and signals interference parameters to user equipment (UE), including DMRS antenna ports, nSCID, power levels, modulation order, code rate, RNTI, cell ID, and SFN, enabling advanced MIMO receivers to suppress or cancel interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base station density is increased to improve network coverage and capacity, then network coverage and user capacity are improved, but co-channel interference increases significantly
Solution Approach 1:
The patent introduces network signaling as an intermediary mechanism that conveys interference parameter information from the network to the UE. This mediator enables the UE to understand and mitigate interference without requiring changes to the base station density configuration, thus maintaining network capacity while reducing the harmful interference effects.
Solution Approach 2:
The patent applies preliminary action by providing the UE with interference parameter information in advance through network signaling. This allows the UE to pre-configure interference mitigation strategies before receiving actual data transmissions, enabling more effective cancellation and suppression of co-channel interference from multiple base stations.
2Device complexity
If traditional UE receivers are used without coordinated interference information, then device complexity is kept low, but interference mitigation capability is insufficient
Solution Approach 1:
The patent segments the interference mitigation function into two parts: (1) network-side generation and transmission of interference parameter information through signaling, and (2) UE-side processing using this information. This segmentation allows the UE to achieve improved interference mitigation capability without implementing complex autonomous interference detection and analysis functions.
Solution Approach 2:
The network signaling serves as an intermediary that provides the UE with pre-processed interference information. This mediator approach allows the UE to focus on execution of interference mitigation algorithms rather than complex decision-making, thereby improving reliability while controlling device complexity.
3Productivity
If interference parameters are signaled to enable advanced interference cancellation, then signal-to-noise ratio and data throughput are improved, but network signaling overhead increases
Solution Approach 1:
The patent changes the parameter representation by using compact signaling formats for interference parameters. Instead of transmitting full interference signal descriptions, the system uses condensed parameter sets (such as reference signal indices, resource block indicators, and power ratios) that convey essential interference characteristics with minimal overhead, thereby maintaining high data throughput while limiting signaling resource consumption.
Data Source
AI summary
Embodiments of the invention are directed to a cellular communication network that can determine whether communications between one base station-UE pair may interfere with another UE that is in the same cell or a different cell. The network identifies interference parameters associated with interference signals that may be received by a UE. The interference signals may be generated by the base station itself, such as communications with other UEs, or by a neighboring base station. The base station transmits the interference parameters to the UE. The UE receives the one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference. The UE then processes received signals using the one or more parameters to suppress the intra-cell or inter-cell interference.