Dynamic Random Access Configuration Switching for Lower Update Latency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently updating random access communication configurations due to the long periodicity of system information updates, leading to latency and potential use of obsolete configurations by user equipment (UEs).
Innovation Solution
Implementing dynamic configuration of random access communications by allowing UEs to switch between multiple configurations based on indications from network entities via different types of signaling or payload, reducing the need for periodic system information updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information updates are performed periodically with long periodicity, then network entities can maintain stable configurations, but latency increases and configurations become obsolete quickly
Solution Approach 1:
The patent implements dynamic configuration by allowing network entities to switch between multiple random access parameter sets based on current network conditions. Instead of relying on periodic updates with fixed timing, the system dynamically selects from pre-configured parameter sets (e.g., first set for normal operation, second set for energy saving modes) using triggering mechanisms such as DCI messages or RAR indicators. This dynamic switching capability resolves the contradiction by enabling fast adaptation without requiring frequent periodic system information updates.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple sets of random access parameters in advance through system information blocks. These parameter sets are prepared beforehand with different characteristics (e.g., different preamble formats, time resources, or power settings) so that when network conditions change, the network entity can immediately switch to the appropriate pre-configured set without needing to negotiate new parameters in real-time. This eliminates latency while maintaining configuration stability.
2Loss of time
If frequent system information updates are performed to reduce latency, then random access parameters can be updated quickly, but energy consumption increases
Solution Approach 1:
The patent implements periodic action in a selective manner by using triggering mechanisms that activate parameter switching only when specific events occur (e.g., network entity enters idle mode, traffic load changes, or beam failure detected). Instead of continuously updating system information, the network entity monitors for triggering events and only then switches between pre-configured parameter sets. This event-driven approach reduces energy consumption compared to frequent periodic updates while maintaining the ability to respond quickly when changes are needed.
Solution Approach 2:
The patent extracts the essential update function from frequent system information broadcasting by separating parameter configuration into two stages: (1) initial configuration of multiple parameter sets through system information blocks, and (2) selective activation of specific sets through compact triggering signals. This extraction allows the system to maintain fast update capability while eliminating the energy overhead of continuous full system information updates, as only brief triggering signals are needed rather than complete parameter re-broadcasting.
3Adaptability or versatility
If multiple configurations are maintained for different scenarios, then adaptability to changing network conditions improves, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by defining distinct parameter sets with different characteristics optimized for specific scenarios (e.g., first set with frequent update intervals for high traffic, second set with extended intervals for low traffic or idle modes). Each parameter set contains specific randomized access parameters such as preamble formats, time resource allocations, and power settings. The network entity switches between these parameter sets based on monitored conditions, providing adaptability without requiring complex real-time parameter generation. The complexity is managed by using pre-defined parameter sets rather than dynamic parameter synthesis.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for dynamic configuration of random access communications. A method for wireless communications by an apparatus includes obtaining, via a first type of signaling, a configuration that indicates at least a first set of parameters for random access communications; obtaining, via one or more of a second type of signaling or a payload scheduled by the second type of signaling, an indication of a modification to the configuration, wherein the modification is based on a second set of parameters that are indicated via one or more of: the configuration, the second type of signaling, or the payload, and wherein the first type of signaling is different from the second type of signaling; and communicating, with a network entity, via a random access channel, based at least in part on the modification to the configuration.