Variable Uplink Response Delays for Non-Terrestrial Networks
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Solution Overview
Problem
Non-terrestrial wireless communication networks face significant communication issues due to fixed response and scheduling delays caused by variable feeder and service link delays, leading to inefficiencies and resource wastage in processing resources.
Innovation Solution
Implementing variable uplink response and scheduling delays by determining a variable RAR window start time, variable maximum quantity of slots for PRACH occasions, and scheduling information related to one or more variable delays, which are then communicated to user equipment (UE) to improve communication efficiency and reduce resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed response and scheduling delays are used in non-terrestrial networks, then the system structure is simple, but communication efficiency deteriorates due to variable feeder and service link delays
Solution Approach 1:
The patent implements variable uplink response delays and scheduling delays that dynamically adapt to changing network conditions. The base station determines variable delays based on detected feeder link and service link delay characteristics, allowing the system to transition from fixed to dynamic delay mechanisms that respond to real-time network state changes.
Solution Approach 2:
The patent changes the delay parameters from fixed values to variable values that are determined based on detected network conditions. The base station adjusts scheduling delays and response delays according to the actual feeder link and service link delay characteristics, enabling the system to optimize performance under varying network conditions.
2Device complexity
If fixed scheduling delays are used, then the configuration is simple, but processing resources are wasted due to inability to adapt to variable delays
Solution Approach 1:
The base station detects actual feeder link and service link delay characteristics and uses this feedback information to determine appropriate variable delays for uplink transmissions. This feedback mechanism allows the system to adjust scheduling and response delays based on real-time network conditions, preventing processing resource waste while maintaining configuration simplicity.
Solution Approach 2:
The base station determines variable delays in advance based on detected network conditions before uplink transmissions occur. By preliminarily calculating appropriate delays based on feeder link and service link characteristics, the system prepares optimal scheduling parameters ahead of time, avoiding resource waste without requiring complex real-time adjustments.
3Productivity
If variable delays are implemented, then communication efficiency improves, but the complexity of delay determination increases
Solution Approach 1:
The base station performs self-measurement of feeder link and service link delay characteristics without requiring external intervention. By detecting network conditions autonomously and using this information to determine variable delays, the system achieves improved communication efficiency while keeping the complexity management within the base station's own processing capabilities.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine at least one of a variable random access response (RAR) window start time, a variable maximum quantity of slots for an index of a first slot of a physical random access channel occasion, or scheduling information related to one or more variable delays for an uplink transmission. The BS may transmit, to a user equipment, at least one of information that identifies the RAR window start time, information that identifies the variable maximum quantity of slots, or the scheduling information. Numerous other aspects are provided.