Random Access Occasion Reuse for Energy-Saving UE Access
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Solution Overview
Problem
Current wireless communication systems do not effectively adapt random access channel resources to provide additional occasions for network energy savings-capable UEs without increasing resource overhead and latency.
Innovation Solution
A network entity indicates a first set of synchronization signal blocks associated with random access occasions for a first type of UE and a second set for a second type of UE, allowing the second type of UE to reuse unused occasions by the first type, and adapt random access occasions based on time division duplex patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If random access occasions are adapted to provide additional opportunities for network energy savings-capable UEs, then network power consumption is reduced, but resource overhead increases
Solution Approach 1:
The random access occasions are segmented into two distinct sets: a first set for first type UEs and a second set for second type UEs. This segmentation allows the network to provide additional random access opportunities specifically for energy savings-capable UEs without affecting the resource allocation for other UEs, thereby reducing network power consumption while managing resource overhead through targeted allocation.
Solution Approach 2:
Different quality of service and resource allocation is applied locally to different UE types. Second type UEs (energy savings-capable) receive access to an additional second set of random access occasions, while first type UEs continue to use the first set. This local differentiation enables the network to optimize power consumption for specific UE categories without unnecessarily increasing overall resource overhead.
2Adaptability or versatility
If additional random access occasions are provided for second type UE, then access opportunities increase, but latency increases
Solution Approach 1:
The patent introduces an additional dimension to random access resource allocation by providing a second set of random access occasions specifically for second type UEs. This dimensional expansion increases access opportunities and versatility without necessarily increasing latency, as the additional occasions are configured in a separate resource dimension that can be optimized independently.
Solution Approach 2:
The random access occasion allocation is made dynamic and adaptive based on UE type. Second type UEs can dynamically select from either the first set or the second set of random access occasions, allowing them to choose the most efficient access path. This dynamic allocation increases access opportunities while maintaining low latency by enabling UEs to select optimal transmission时机.
3Adaptability or versatility
If separate message indication is sent to second type UE, then random access adaptation is achieved, but device complexity increases
Solution Approach 1:
The message indication mechanism is designed with universality to handle multiple UE types through a unified signaling approach. The same message structure can indicate both the first set and second set of random access occasions, allowing the network to provide adapted random access configuration to second type UEs without requiring separate complex signaling procedures, thereby achieving adaptability while minimizing device complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first message indicating a first subset of random access occasions of a set of random access occasions, the first subset of random access occasions associated with use by a first type of UE for transmission of random access messages. The UE may receive, based on the UE being a second type of UE, a second message indicating information associated with one or more random access occasions of the first subset of random access occasions that are unused by the first type of UE. The UE may transmit a random access preamble using a random access occasion from the one or more random access occasions that are unused by the first type of UE.