L1/L2 Mobility Capability Signaling for Handover Delay Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing Layer 1 or Layer 2 mobility, leading to delays and service interruptions due to incompatible mobility configurations between user equipment (UE) and network nodes, which can result in fallback to slower mobility techniques.
Innovation Solution
The method involves transmitting and obtaining capability information related to Layer 1 or Layer 2 mobility using configured and activated cell sets, allowing for seamless communication and reducing handover delays by ensuring compatibility between UE and network nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Layer 1 or Layer 2 mobility is implemented without capability signaling, then mobility speed is improved, but compatibility between UE and network node deteriorates leading to fallback to slower techniques
Solution Approach 1:
The patent applies preliminary action by having the UE transmit capability information indicating support for L1/L2 mobility using configured and activated cell sets before mobility operations begin. The network node obtains this capability information and configures cell sets accordingly in advance, ensuring compatibility is established prior to mobility execution, thus preventing fallback to slower techniques.
2Reliability
If capability signaling for L1/L2 mobility is implemented, then compatibility between UE and network node is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by making the capability signaling optional rather than universal. Only UEs that support L1/L2 mobility using configured and activated cell sets transmit this specific capability information. The network node processes this information locally when present, allowing compatibility improvement for capable devices without imposing signaling overhead on all UEs.
3Loss of time
If cell sets are configured based on UE capabilities, then handover delays are reduced, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network node configure appropriate cell sets in advance based on received capability information. By knowing the UE's capabilities beforehand, the network can prepare suitable configured and activated cell sets prior to handover events, enabling faster mobility execution without requiring complex real-time decisions during actual handover.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit capability information indicating a capability relating to Layer 1 or Layer 2 (L1/L2) mobility using a configured cell set and an activated cell set. The UE may communicate in accordance with the capability information. Numerous other aspects are described.