Sidelink Relay Handover via Base Station Capability Segmentation
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Solution Overview
Problem
Wireless communication systems face complexities in performing cell handover procedures due to the presence of both sidelink relay-capable and non-sidelink relay-capable base stations, limiting the number of base stations that relay user equipment (UEs) can perform handovers with and increasing power consumption at remote UEs.
Innovation Solution
UEs, such as relay UEs and remote UEs, determine whether candidate base stations support sidelink relay operations by analyzing System Information Block (SIB) messages and measurement reports, omitting measurements for non-sidelink relay-capable base stations and preferring sidelink relay-capable ones to perform handovers, thereby enabling informed decision-making for handover procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay UEs perform handover with both sidelink relay-capable and non-sidelink relay-capable base stations, then the number of available base stations for handover increases, but the complexity of handover procedures increases and power consumption at remote UEs increases
Solution Approach 1:
The patent segments base stations into two distinct categories: sidelink relay-capable base stations and non-sidelink relay-capable base stations. Relay UEs are configured to perform handover only with sidelink relay-capable base stations, creating a segmented handover process that avoids the complexity of managing handovers with both types of base stations while maintaining adaptability to different network scenarios
Solution Approach 2:
The patent applies local quality by enabling relay UEs to selectively interact with specific base stations based on their sidelink relay capabilities. The handover procedure is optimized locally at each relay UE by identifying and preferring sidelink relay-capable base stations through measurement reports and system information, thereby reducing overall system complexity while maintaining versatility
2Adaptability or versatility
If relay UEs perform handover with non-sidelink relay-capable base stations, then more base stations are available for handover, but power consumption at remote UEs increases
Solution Approach 1:
The patent segments the handover process into distinct phases: measurement and evaluation phase where relay UEs identify sidelink relay-capable base stations, and execution phase where handover is performed only with identified capable base stations. This segmentation eliminates unnecessary power consumption associated with handover attempts to non-capable base stations while maintaining adaptability to network conditions
Solution Approach 2:
The patent implements preliminary action by having relay UEs perform advance identification and evaluation of sidelink relay-capable base stations through measurement reports and system information analysis before initiating handover. This preliminary filtering action prevents wasted power consumption on unsuccessful handover attempts to non-capable base stations while preserving the ability to handover to multiple capable base stations
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may relay wireless communications between a first base station and a second UE via at least a sidelink communication link with the second UE. The first UE may transmit, to the first base station, a measurement report for one or more candidate base stations, the measurement report indicating that the one or more candidate base stations support sidelink relay operation. The first UE may receive instructions to perform a handover procedure from the first base station to a second base station of the one or more candidate base stations based on the measurement report, where the second base station supports sidelink relay operation. The first UE may then perform the handover procedure including establishing a wireless connection with the second base station based on the instructions.