DSS Base Station Resource Mapping Around LTE CRS Collisions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting multiple wireless technologies, particularly in the dynamic spectrum sharing system, with existing technologies struggling to efficiently support multiple wireless technologies, particularly in the dynamic spectrum sharing system, with existing technologies struggling to efficiently support multiple wireless communication systems.
Innovation Solution
A method and device for dynamic spectrum sharing (DSS) between LTE and NR systems, involving mapping downlink data on resource elements, identifying partial data based on cell-specific reference signals, and transmitting data on specific resource elements after establishing a radio resource control connection, to avoid collisions and optimize spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic spectrum sharing is implemented between LTE and NR systems, then spectrum utilization efficiency is improved, but signal collision and interference between different wireless technologies occurs
Solution Approach 1:
The patent segments the resource elements (REs) in the time-frequency grid by identifying REs that collide with CRS (cell-specific reference signals) and excluding them from NR data mapping. This segmentation allows LTE CRS to be transmitted on certain REs while NR data is mapped to non-collecting REs, thereby avoiding signal collision and interference between LTE and NR systems while maintaining efficient spectrum sharing.
2Ease of manufacture
If existing wireless communication infrastructure is used for DSS, then installation costs are reduced, but support for multiple wireless technologies becomes complex
Solution Approach 1:
The patent implements a universal resource mapping mechanism that enables a single base station to support both LTE and NR systems simultaneously. By establishing a correspondence relationship between LTE and NR resource elements and using a unified mapping method that considers CRS patterns, the system allows one infrastructure to serve multiple wireless technologies, reducing installation costs while managing complexity through standardized procedures.
3Productivity
If NR data is mapped on all available REs, then data transmission capacity is maximized, but collision with LTE CRS pattern causes reception failure
Solution Approach 1:
The patent performs preliminary identification of REs that would collide with LTE CRS patterns before mapping NR data. By pre-determining which REs contain CRS based on the CRS pattern and excluding those REs from the NR data mapping process, the system avoids collision-induced reception failures while maximizing data transmission capacity on the remaining non-collecting REs.
Data Source
AI summary
A method performed by a base station that supports dynamic spectrum sharing (DSS) for long term evolution (LTE) and new radio (NR) is provided. The method includes the processes of mapping first downlink data associated with NR onto resource elements (REs) in the data region of a subframe, differentiating second partial data from first partial data, the first partial data having been mapped onto first REs based on a cell-specific reference signal (CRS) pattern associated with LTE, among the REs, and the second partial data having been mapped onto second REs that are different from the first REs, transmitting the second partial data in the second REs, after establishing a radio resource control (RRC) connection with a terminal associated with NR, mapping second downlink data onto fourth REs, which exclude third REs based on a CRS pattern associated with LTE among REs in the data region of a different subframe, and transmitting the second downlink data in the fourth REs.