Wireless Node Random Access Timing Offset Segmentation
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Solution Overview
Problem
Current wireless communication systems, particularly in Non-Terrestrial Networks (NTN) and similar networks with large transmission delays and delay differences, face challenges with existing random access designs that are not applicable or effective due to these delays.
Innovation Solution
A method for wireless communications in a first node that involves receiving information to determine candidate formats for signals, transmitting a first signal using a first format and a second signal using a second format, where the formats are related to timing offset values and used for random access, enabling support for users with different timing compensation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional random access design is used in NTN networks, then the system structure remains simple, but the random access cannot work effectively due to large transmission delay and delay difference
Solution Approach 1:
The patent segments the random access procedure into multiple stages with different timing offset values. Multiple PRACH formats are defined, each associated with a specific timing offset value, allowing the terminal to select appropriate formats based on network conditions. This segmentation enables the system to handle large transmission delays by dividing the random access process into manageable parts with different timing characteristics.
Solution Approach 2:
The patent introduces dynamic selection of PRACH formats based on timing offset values. The network can dynamically configure which PRACH formats are available, and the terminal can dynamically choose the appropriate format based on its timing advance capability. This dynamic approach allows the system to adapt to varying delay conditions without requiring a completely new static system design.
2Adaptability or versatility
If multiple PRACH formats with different timing offset values are introduced, then support for users with different timing compensation capabilities is enabled, but the system complexity increases
Solution Approach 1:
The patent applies local quality by assigning different timing offset values to different PRACH formats based on the specific needs of users. Users with different timing compensation capabilities can be served by selecting appropriate PRACH formats with corresponding timing offset values. This allows the system to provide tailored timing characteristics to different users without requiring a complete system redesign.
Solution Approach 2:
The patent changes the timing offset parameter to enable different PRACH formats. By varying the timing offset value associated with each PRACH format, the system can accommodate users with different timing compensation capabilities. This parameter change approach allows flexibility in system configuration without fundamentally altering the random access structure.
3Reliability
If timing pre-compensation is implemented, then random access performance in large-delay networks is improved, but the complexity of timing management increases
Solution Approach 1:
The patent implements preliminary action by having the terminal perform timing advance indication before the actual random access transmission. The terminal indicates its timing advance capability in advance, allowing the network to pre-configure the appropriate PRACH format. This preliminary timing management simplifies the overall process by establishing timing parameters before the critical random access transmission occurs.
Data Source
AI summary
Method and device in nodes used for wireless communications. A node receives first information, the first information being used to determine X candidate formats; transmits a first signal, the first signal using a first format; and transmits a second signal, the second signal using a second format; the first format is one of the X candidate formats, and the second format is also one of the X candidate formats; a first timing offset value is used to determine a transmission timing for the first signal, while a second timing offset value is used to determine a transmission timing for the second signal, where the first timing offset value is unequal to the second timing offset value; the first format relates to the first timing offset value while the second format relates to the second timing offset value. The present disclosure improves the random access performance.