Dynamic Search Space Configuration Switching for Low-Latency Wireless
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in dynamically switching search space configurations within a transmission cycle, leading to latency issues, particularly for high-reliability and low-latency applications like URLLC traffic.
Innovation Solution
Implementing a method for dynamic switching of search space configurations based on the results of initial transmissions, allowing for switching between predefined candidate configurations within a single transmission cycle, using explicit or implicit signaling, such as DCI or Layer 1 messaging, to reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional search space configuration switching methods are used, then system stability is maintained, but latency increases for high-reliability low-latency applications
Solution Approach 1:
The patent implements dynamic search space configuration switching by allowing the UE to transition between different search space configurations (first configuration and second configuration) based on reception outcomes. The configuration switching is triggered dynamically when the UE fails to receive a transmission, enabling adaptive response to channel conditions and reducing latency for urgent transmissions.
Solution Approach 2:
The patent pre-configures multiple search space configurations (first search space configuration and second search space configuration) before transmission occurs. These pre-configured search spaces allow the UE to immediately switch to an alternative configuration when needed, without requiring time-consuming reconfiguration procedures, thus reducing latency.
2Productivity
If dynamic search space configuration switching is implemented, then latency is reduced for URLLC traffic, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the UE monitors reception outcomes (success or failure) and uses this feedback to determine whether to switch search space configurations. When a transmission is not successfully received, the UE triggers a configuration switch, creating a closed-loop system that adapts to actual transmission conditions and improves overall productivity.
Solution Approach 2:
The patent changes key parameters of the search space configuration, including monitoring occasions, aggregation levels, and control resource sets, to optimize transmission efficiency. By adjusting these parameters dynamically based on traffic requirements and channel conditions, the system achieves higher productivity for time-sensitive applications.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may determine a result associated with an initial set of transmissions of a periodic transmission cycle, and switch a search space configuration set to be used for one or more slots of the periodic transmission cycle based at least in part on the result, the search space configuration set being switched to a candidate search space configuration set. In some aspects, a user equipment may determine that a search space configuration set to be used for a slot of a periodic transmission cycle is to be switched based at least in part on a result associated with an initial set of transmissions of the periodic transmission cycle; and switch the search space configuration, the search space configuration set being switched to a candidate search space configuration set. Numerous other aspects are provided.