Dual RACH Resource Selection for Low-Power Wireless Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing random access channel resources, particularly in reducing network energy consumption and enhancing flexibility and management of random access procedures.
Innovation Solution
Implementing a dual set of random access channel resources, where a first set has a static time domain configuration and a second set is dynamically adaptable, with selection criteria based on probability, RSRP thresholds, and beam indices to steer UEs to use either set, allowing for network energy savings and improved resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a single set of random access channel resources is used with static configuration, then network power consumption increases due to continuous monitoring, but resource management simplicity is maintained
Solution Approach 1:
The patent divides the random access channel resources into two separate sets: a first set with static time domain configuration and a second set with dynamic time domain configuration. This segmentation allows the network to selectively activate only the necessary resource sets based on current load conditions, reducing unnecessary power consumption while maintaining management flexibility through independent control of each set.
Solution Approach 2:
The patent introduces dynamic adaptability by configuring the second set of random access channel resources with dynamic time domain parameters that can be adjusted based on network conditions. The network entity can activate or deactivate this second set dynamically, transforming the previously static resource allocation into a dynamic system that adapts to varying traffic demands, thereby reducing power consumption during low-load periods while maintaining service quality during high-load periods.
2Adaptability or versatility
If dynamic random access channel resources are implemented, then network flexibility and adaptability improve, but system complexity increases
Solution Approach 1:
By segmenting resources into two distinct sets with different configuration characteristics (static vs. dynamic), the patent manages complexity through clear separation of concerns. Each set can be independently controlled and managed, allowing the network to activate only the dynamic set when flexibility is needed, rather than making the entire system complex at all times.
Solution Approach 2:
The patent applies different quality characteristics to different resource sets: the first set maintains simple static configuration suitable for baseline operations, while the second set provides dynamic configuration for enhanced adaptability. This local differentiation allows each subset to be optimized for its specific purpose without unnecessarily complicating the entire system.
3Productivity
If random access resource selection is left to pure chance, then selection simplicity is maintained, but access efficiency and latency increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring two distinct sets of random access channel resources with different time domain characteristics before the actual random access procedure. The network entity prepares both sets in advance, allowing the UE to select from pre-prepared options rather than generating resources on-the-fly, which improves access efficiency while keeping the selection mechanism relatively simple.
Solution Approach 2:
The patent changes the time domain parameters of the random access channel resources by providing two sets with different configurations. The UE can select between these pre-configured parameter sets based on current conditions, improving access efficiency through parameter diversity without requiring complex real-time generation or selection algorithms.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described in which a UE may be configured with random access resource selection criteria that can steer the UE to use either a first set of random access resources or a second set of additional random access resources that may be dynamically activated or deactivated. The selection criteria may be a probability that is assigned to each set of resources, and the UE may perform random selection based on a weighting that is given by the probability. Additionally, or alternatively, the selection criteria may include a reference signal receive power (RSRP) associated with the different sets of random access resources, and the second set of random access resources may be selectable by a UE only if a RSRP of a reference signal associated with the second set of random access resources is above a threshold value.