Secondary Cell-UE BUDC Group for Low Latency Sidelink
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Solution Overview
Problem
Conventional wireless communication systems experience network latency due to data traversing multiple network entities, which degrades performance for time-sensitive communications like telemetry and sensor data.
Innovation Solution
Implementing dual connectivity with secondary cell-user equipment (SC-UE) to form a base station-user equipment dual connectivity (BUDC) group, allowing UEs to communicate directly through a secondary cell, thereby bypassing base stations and core networks, reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data travels through base station and core network for communication between UEs, then network coverage and connectivity are ensured, but network latency increases
Solution Approach 1:
The communication path is segmented into two independent paths: a primary path through base station and core network for reliable connectivity, and a secondary direct path between UEs for low latency. Each path serves different performance requirements simultaneously without interfering with the other.
Solution Approach 2:
The patent introduces a relay UE that acts as an intermediary to enable direct communication between UEs. The relay UE receives data from one UE and forwards it to another UE through sidelink, eliminating the need for data to traverse the base station and core network while maintaining network awareness.
2Loss of time
If direct UE-to-UE communication is implemented, then network latency is reduced, but network control and management become more complex
Solution Approach 1:
UEs perform self-configuration and self-management for direct communication. The transmitting UE automatically detects the receiving UE, determines appropriate resources, and establishes the direct communication link without requiring manual network configuration. The network retains oversight but does not micromanage the direct UE-UE connections.
3Loss of time
If dual connectivity with secondary cell is implemented, then low latency communication is enabled, but system complexity increases
Solution Approach 1:
The UE is designed to perform multiple functions: it can operate as a regular UE connected to the network, as a transmitting UE initiating direct communication, as a receiving UE accepting direct communication, and as a relay UE facilitating communication between other UEs. This multi-functionality consolidates what would otherwise require separate devices or complex network configurations into a single universal platform.
Data Source
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AI summary
Techniques and apparatuses are described for enabling dual connectivity with secondary cell-user equipment. In some aspects, a base station (121) serving as a primary cell forms a base station-user equipment dual connectivity (BUDC) group (410) by configuring a user equipment (UE, 111) as a secondary cell-user equipment (SC-UE, 420) to provide a secondary cell. The base station (121) or SC-UE (420) can then add other UEs (112, 113, 114) to the BUDC group (410) thereby enabling dual connectivity for the UEs through the primary cell or secondary cell provided by the SC-UE (420). In some cases, the SC-UE (420) schedules resources of an air interface (302) by which the other UEs to communicate with the SC-UE (420). By so doing, the SC-UE (420) can communicate data with the other UEs (112, 113, 114) of the BUDC group (410) without communicating through a base station (121, 122), which decreases latency of communications between the UEs (111-114) of the BUDC group (410).