Wireless Resource Segmentation for LTE and LTE-A Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting multiple wireless access technologies, such as LTE and LTE-A, on a common terrestrial radio access network, leading to performance degradation and resource conflicts that affect user experience.
Innovation Solution
The system reserves specific frequency-time block wireless resources for LTE-A signals, using predetermined locations like PHICH resource groups, control channel elements, and PDSCH regions, while employing mitigation procedures to minimize performance loss for legacy LTE terminals, such as modifying duty cycles or signal power, to avoid resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless resources are shared between LTE and LTE-A technologies, then resource utilization efficiency is improved, but performance degradation and resource conflicts occur affecting user experience
Solution Approach 1:
The patent segments wireless resources by creating separate resource pools for LTE and LTE-A technologies. Specifically, it divides downlink resources into PDSCH resources and control resources, and uplink resources into PUSCH resources and Sounding Reference Signal (SRS) resources, with each pool dedicated to specific technology to avoid conflicts while maintaining overall resource utilization efficiency
Solution Approach 2:
The patent applies local quality by assigning different resource allocation characteristics to different resource types. For example, LTE-A PDSCH resources use different resource block allocation rules compared to legacy LTE PDSCH resources, and control resources for LTE-A are allocated with specific periodicity and offset parameters that differ from legacy LTE control resources, optimizing each resource type for its intended technology
2Adaptability or versatility
If LTE-A features are added to support emerging access technologies, then system capability and adaptability are improved, but constraints on LTE advanced design increase limiting potential gains
Solution Approach 1:
The patent implements universality by designing a unified resource management framework that can simultaneously support both legacy LTE and advanced LTE-A technologies. The base station is configured with resource pools that can serve multiple technology types, and the same physical channels (PDSCH, PUSCH, PUCCH) are used by both LTE and LTE-A with technology-specific allocation parameters, reducing the need for separate dedicated infrastructure
Solution Approach 2:
The patent applies dynamics by making resource allocation parameters configurable and adaptable. The network can dynamically adjust the size and configuration of resource pools for different technologies based on traffic demands and network conditions. For example, the proportion of resources allocated to LTE-A versus legacy LTE can be adjusted, and resource allocation parameters such as resource block sizes, periodicity, and offsets can be modified to optimize performance for the current mix of connected devices
Data Source
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AI summary
Support for multiple wireless access technologies at a common terrestrial radio access network is described herein. By way of example, wireless resources can be reserved in a manner that facilitates transmission of control and reference signals to advanced or emerging-technology user terminals (e.g., LTE-A), while mitigating adverse affects on legacy user terminals (e.g., LTE Release 8). As such, information designated for LTE-A terminals can be embedded in predetermined reserved locations, which exploit known standardized behavior of legacy terminals in expecting information at specific locations. Such reserving of resources can occur typically without the legacy terminals being affected, mitigating or avoiding performance degradation for legacy terminals.