PRACH Backoff Configuration for NES and SBFD Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing random access channel resources for network energy savings (NES) and subband non-overlapping full duplex (SBFD) operations, particularly in configuring backoff indicators for different types of PRACH occasions to optimize network performance and reduce power consumption.
Innovation Solution
Implementing separate backoff indicator configurations for different types of PRACH occasions, including additional PRACH resources associated with NES and SBFD, to provide shorter backoff times for NES-capable and SBFD-capable UEs, while maintaining compatibility with legacy UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate backoff indicator configurations are implemented for different types of PRACH occasions, then network efficiency and power consumption are optimized for NES-capable and SBFD-capable UEs, but device complexity and configuration management become more complex
Solution Approach 1:
The patent segments the backoff indicator configuration into separate configurations for different types of PRACH occasions. Specifically, it configures a first backoff indicator for first-type PRACH occasions and a second backoff indicator for second-type PRACH occasions, allowing differentiated resource allocation and backoff management for legacy UEs versus NES/SBFD-capable UEs. This segmentation enables optimized network efficiency for advanced UEs while maintaining compatibility with legacy devices.
Solution Approach 2:
The patent applies local quality by assigning different backoff indicator configurations to different PRACH occasion types based on their specific requirements. First-type PRACH occasions use one backoff configuration while second-type PRACH occasions use another, allowing each type to have optimized parameters suited to its function and user equipment capabilities.
2Speed
If shorter backoff times are provided for NES-capable and SBFD-capable UEs, then access speed and network responsiveness are improved, but resource contention and interference may increase
Solution Approach 1:
The patent implements dynamic backoff time adjustment based on UE capabilities and PRACH occasion types. NES-capable and SBFD-capable UEs receive shorter backoff times for second-type PRACH occasions, enabling faster access when conditions permit. The system dynamically adapts backoff parameters rather than using fixed values, balancing access speed with resource protection.
Solution Approach 2:
The patent changes the backoff time parameter differently for different PRACH occasion types. By configuring distinct backoff indicator values for first-type and second-type PRACH occasions, the system optimizes access speed for advanced UEs on second-type occasions while maintaining appropriate backoff on first-type occasions to reduce overall resource contention.
Data Source
AI summary
Systems and techniques are provided for wireless communications. A network entity can transmit a first configuration of a backoff indicator (BI) associated with a prioritized random access procedure, the first configuration corresponding to a first type of random access channel (RACH) occasions (ROs). The network entity can transmit a second configuration of the BI, the second configuration corresponding to a second type of ROs different from the first type of ROs. The network entity can transmit, to a user equipment (UE), information including a BI value corresponding to a backoff for the prioritized random access procedure by the UE, wherein the BI value indicates a first time value for the backoff based on the first configuration and indicates a second time value for the backoff based on the second configuration.