UE Capability Indicator for Split Bearer and Fast Switch
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently informing the network about the capabilities of user equipment (UE) devices regarding split bearer and fast switch functionalities, which are crucial for optimizing data transmission in 5G networks, especially for narrowband IoT and Category M1 devices.
Innovation Solution
The UE devices are equipped with a mechanism to transmit an indicator bit to the radio access network, indicating their capabilities for split bearer and fast switching functionalities, allowing the network to dynamically adjust data transmission methods based on the device's capabilities, such as supporting split/aggregate or fast switch on both uplink and downlink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE devices transmit detailed capability information to the network, then the network can optimize data transmission methods, but the signaling overhead and device complexity increase
Solution Approach 1:
The patent extracts only the essential capability information (split bearer and fast switch support) into a compact indicator format, separating the critical capability data from other UE capabilities. This allows the network to obtain necessary optimization information without requiring transmission of complete device capability sets, thereby reducing signaling overhead while maintaining transmission efficiency optimization.
Solution Approach 2:
The patent changes the representation parameter of device capabilities from detailed capability descriptions to a compact binary indicator system. By encoding split bearer support and fast switch support as individual indicator bits, the patent transforms complex capability information into a simplified parameter format that reduces signaling complexity while enabling the network to determine appropriate transmission methods.
2Productivity
If the network implements split bearer functionality, then data aggregation capability improves, but buffering requirements and processing complexity increase
Solution Approach 1:
The patent implements dynamic bearer splitting where data can be dynamically routed through multiple pathways (master cell group and secondary cell group) based on real-time network conditions and device capabilities. This dynamic approach allows the system to aggregate data from multiple sources to improve throughput while managing buffer requirements through intelligent data distribution and routing decisions rather than static buffering.
3Speed
If the network implements fast switch functionality, then switching speed between cell groups improves, but processing complexity and control overhead increase
Solution Approach 1:
The patent prepares switching capabilities in advance by having UE devices indicate their fast switch support capability before actual data transmission begins. The network pre-configures the necessary parameters and pathways for potential switching operations, so when switching is needed, the execution can occur rapidly without complex real-time decision-making or configuration, thereby achieving high switching speed while managing processing complexity through advance preparation.
Data Source
AI summary
Various embodiments disclosed herein provide for facilitating informing a radio access network of the capabilities of a user equipment device with regard to switching and aggregation of streams received from master and secondary base station devices. Different user equipment device may have different capabilities with regard to aggregated and combining streams received from the base station devices (e.g., split bearer) or switching between the streams (fast switching). The embodiments described herein provide a way for the UE to inform the radio access network about the capabilities of the UE device. In an embodiment, in response to receiving a query from the radio access network, the UE can return via a UE resource capability information element, an indicator indicating the capabilities of the UE device. The indicator can be an integer bit that has different values depending on the capabilities of the UE device.