Interference Mitigator for DSS Throughput via CRS Rate Matching
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Solution Overview
Problem
Dynamic Spectrum Sharing (DSS) in wireless communication systems leads to interference between 4G LTE and 5G NR technologies, causing throughput degradation due to unknown cell-specific reference signal (CRS) symbols from neighboring base stations, which existing methods fail to adequately address.
Innovation Solution
Implementing a system where base stations exchange CRS symbols with user equipment, allowing rate matching around both local and neighboring CRS symbols to reduce interference, thereby improving aggregate throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Dynamic Spectrum Sharing is implemented to allow both 4G LTE and 5G NR in the same frequency band, then spectrum utilization efficiency is improved, but interference between the two technologies occurs causing throughput degradation
Solution Approach 1:
The base station performs preliminary actions by determining and providing CRS symbol information from neighboring base stations to the user equipment before the user equipment attempts to decode signals in the DSS environment. This advance provision of reference signal locations enables the user equipment to perform rate matching and avoid interference, resolving the contradiction between spectrum sharing efficiency and interference mitigation
2Productivity
If user equipment performs rate matching around only its own base station's CRS symbols, then device complexity is reduced, but throughput degradation occurs due to interference from neighboring base stations' CRS symbols
Solution Approach 1:
The base station acts as an intermediary by collecting CRS symbol information from neighboring base stations and relaying this information to the user equipment. This intermediary approach allows the user equipment to perform comprehensive rate matching around all relevant CRS symbols (both its own and neighboring base stations) without the complexity of directly interfacing with multiple base stations, thereby improving throughput while managing device complexity
3Object-affected harmful factors
If user equipment is provided with CRS symbol information from neighboring base stations, then interference mitigation is improved, but information overhead increases
Solution Approach 1:
The patent changes the parameter representation of CRS symbol information by providing compact indicators (such as resource element positions and CRS configuration parameters) rather than complete signal data. This parameter-based approach conveys essential interference mitigation information to the user equipment while minimizing information overhead, resolving the contradiction between interference mitigation effectiveness and overhead
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for implementing an interference mitigator are disclosed. In one aspect, a method includes the actions of determining, by a cellular base station, one or more first cell reference signal symbols of the cellular base station. The actions further include determining one or more second cell reference signal symbols of a neighboring cellular base station. The actions further include determining that a user equipment is communicating with the cellular base station. The actions further include providing, by the cellular base station and to the user equipment, the one or more first cell reference signal symbols and the one or more second cell reference signal symbols. The user equipment reduces interference by performing rate matching around the one or more first cell reference signal symbols and the one or more second cell reference signal symbols.