Split Radio Connectivity Mode for Dual-Connectivity Wireless Systems
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Solution Overview
Problem
Existing wireless networks with dual radio access technologies face inefficiencies in spectral usage due to inherent limitations in time division duplex (TDD) schemes, leading to delays and reduced spectral efficiency in data transmission.
Innovation Solution
The implementation of a split radio connectivity mode in wireless access devices, allowing for simultaneous dual connectivity with 4G and 5G base stations, and utilizing a modified TDD protocol to optimize data transmission by allocating entire time slots for unidirectional data traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time division duplex (TDD) schemes are used in dual radio access technology networks, then device compatibility and network coverage are improved, but spectral efficiency and data transmission speed deteriorate due to inherent TDD limitations
Solution Approach 1:
The patent segments the TDD protocol into separate uplink and downlink portions, allowing different radio access technologies (4G LTE and 5G NR) to operate simultaneously in different time slots. This segmentation enables dual connectivity without requiring a standalone 5G core network, thereby improving spectral efficiency while maintaining device compatibility
Solution Approach 2:
The patent implements dynamic TDD slot allocation where uplink and downlink time slots can be flexibly configured and adjusted based on traffic conditions. This dynamic approach allows the system to optimize spectral efficiency for different service types and traffic patterns while maintaining backward compatibility with existing 4G devices
2Productivity
If standalone 5G network cores are deployed to improve data rates and spectral efficiency, then network capacity and speed are enhanced, but capital expenditures and infrastructure costs increase
Solution Approach 1:
The patent enables a single TDD protocol implementation to serve multiple functions: it supports both 4G LTE and 5G NR radio access technologies simultaneously, allowing existing 4G infrastructure to be leveraged while providing 5G capabilities. This multi-functionality eliminates the need for separate standalone 5G core networks, reducing capital expenditures while maintaining enhanced data rates
Solution Approach 2:
The TDD protocol acts as an intermediary layer that mediates between 4G LTE and 5G NR radio access technologies. By using TDD as the common framework, the system can provide 5G-level spectral efficiency and data rates while avoiding the need for expensive standalone 5G infrastructure deployment
3Productivity
If dual connectivity with 4G and 5G base stations is implemented to improve network capacity, then spectral efficiency is enhanced, but device complexity and protocol management difficulty increase
Solution Approach 1:
The patent uses a homogeneous TDD protocol framework for both 4G LTE and 5G NR dual connectivity operations. By maintaining the same TDD-based time slot structure and uplink/downlink allocation mechanisms across both radio access technologies, the system simplifies protocol management and reduces device complexity compared to heterogeneous protocol approaches
Data Source
AI summary
Methods and apparatus for operation of a dual-connectivity enabled premises device in a wireless communication network. In one embodiment, the methods and apparatus utilize so-called “quasi-licensed” CBRS (Citizens Broadband Radio Service) wireless spectrum in conjunction with a cellular wireless communication network (e.g. having 4G/4.5G LTE and 5G NR base stations) for the provision of services to a number of installed enhanced fixed wireless apparatus (FWAe) at user or subscriber premises. The FWAe has dual-connectivity functionality, and can connect to two different access technologies simultaneously. The FWAe (and base stations) also support a “split” mode of operation wherein each air interface is selectively used for only certain types of traffic (e.g., UL or DL only).