Differentiated Random Access Parameter Handling for Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in 3GPP LTE, face challenges in efficiently managing random access procedures for both normal and delay-tolerant access types, leading to congestion and overload issues due to the lack of distinct handling of access types and back-off intervals.
Innovation Solution
The proposed solution involves separately configuring and handling random access parameters for normal and delay-tolerant access types, including distinct maximum preamble transmission numbers and back-off intervals, which are indicated through system information blocks and random access responses, allowing for adaptive back-off operations based on access type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single maximum preamble transmission number is used for all UE types, then the system structure is simple, but normal UEs experience excessive retransmissions and delay-tolerant UEs experience insufficient retransmissions
Solution Approach 1:
The patent segments the random access parameters into separate configurations for normal UEs and delay-tolerant UEs. Specifically, it defines separate maximum preamble transmission numbers (preambleTransMax for normal UEs, preambleTransMaxDTA for delay-tolerant UEs) and separate back-off interval configurations. This segmentation allows each UE type to have optimized parameters tailored to their specific access characteristics, resolving the contradiction between adaptability and complexity by making the complexity manageable through structured separation.
Solution Approach 2:
The patent applies local quality by providing different parameter values and configurations specifically for different UE types. Normal UEs receive one set of parameters optimized for timely access, while delay-tolerant UEs receive another set optimized for their specific needs. This localized parameter configuration ensures that each UE type receives the appropriate treatment without requiring a completely separate system, thus improving adaptability while keeping the overall structure manageable.
2Productivity
If a single back-off interval is used for all access types, then the system is simple to manage, but normal UEs experience excessive delay and delay-tolerant UEs experience unnecessary waiting time
Solution Approach 1:
The patent segments the back-off interval management into separate handling for normal UEs and delay-tolerant UEs. It defines separate back-off interval parameters (backoffIndicator for normal UEs, backoffIndicatorDTA for delay-tolerant UEs) and implements distinct back-off procedures. This segmentation enables optimized back-off behavior for each UE type, improving overall productivity by ensuring normal UEs get timely responses while delay-tolerant UEs experience appropriate waiting periods, with the complexity managed through clear procedural separation.
Solution Approach 2:
The patent introduces dynamic back-off interval adjustment based on UE type and access conditions. The back-off intervals are not fixed but can be adjusted based on the specific UE category and network conditions. This dynamic adjustment mechanism allows the system to optimize access efficiency in real-time while managing complexity through standardized adjustment procedures rather than completely arbitrary variations.
3Ease of operation
If random access parameters are not differentiated by access type, then the system is easy to implement, but contention resolution becomes inefficient and network overload increases
Solution Approach 1:
The patent segments the random access procedure into distinct handling paths for normal UEs and delay-tolerant UEs at multiple stages: separate preamble transmission limits, separate back-off interval applications, and differentiated contention resolution procedures. This segmentation improves reliability by ensuring that contention resolution is handled appropriately for each UE type, preventing network overload while maintaining ease of operation through standardized procedural frameworks that guide UE behavior.
Data Source
AI summary
The present description proposes a user equipment for processing data related to contention-based random access in a wireless communication system. The present description proposes to separately handle random access related parameters according to access type of a user equipment. Examples of the access type include normal access and delay tolerant access. In detail, a system information block indicating a first maximum number of preamble transmission applicable to a first type UE performing normal access and a second maximum number of preamble transmission applicable to a second type UE performing delay tolerant access is proposed. Further, back-off interval information used to indicate first type back-off interval information applicable to the first type UE and second type back-off interval information applicable to the second type UE is proposed.