Dynamic Backoff Control for Wireless Random Access Efficiency
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, efficient management of data transmission and reception is hindered by failed random access attempts, leading to inefficiencies in data buffer management and increased delays in accessing the network.
Innovation Solution
A terminal equipped with a transceiver and processor that receives backoff-related information from a base station to perform random access, transmits buffer status information, and receives uplink resource allocation, enabling differential backoff times and optimized access attempts based on access categories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access is reattempted after failure, then connection establishment probability is improved, but access delay increases
Solution Approach 1:
The patent implements dynamic backoff time adjustment where the backoff duration is not fixed but varies based on access category and failure scenario. The terminal determines different backoff times dynamically according to the specific random access failure situation, allowing the system to adapt between aggressive reattempts (short backoff) and conservative waiting (long backoff) to balance connection probability and access delay.
Solution Approach 2:
The patent changes the backoff time parameter based on access category and random access failure type. By modifying this key parameter dynamically rather than using a static value, the system optimizes the trade-off between reattempt frequency and delay, improving connection establishment while controlling access latency.
2Productivity
If uniform backoff time is used for all terminals, then implementation simplicity is maintained, but access efficiency deteriorates
Solution Approach 1:
The patent applies different backoff time values to different access categories rather than using a uniform approach. Each access category (e.g., emergency call, regular data, signaling) receives customized backoff parameters tailored to its specific requirements, improving overall access efficiency while maintaining manageable complexity through standardized category definitions.
Solution Approach 2:
The patent segments the terminal population into different access categories, allowing differentiated backoff control for each segment. This segmentation enables optimized access efficiency for different traffic types while keeping the control mechanism systematic and manageable through category-based rules.
3Productivity
If data buffer is continuously monitored, then data transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent implements periodic buffer status reporting where terminals report their data buffer status at regular intervals or triggered by specific events rather than continuously. This periodic monitoring maintains data transmission efficiency by keeping the network informed of buffer status while reducing signaling overhead compared to continuous reporting.
Data Source
AI summary
Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system such as long term evolution (LTE). Disclosed is a method by which a terminal transmits a buffer status report (BSR) in a communication system, comprising the steps of: allocating an uplink resource from a base station; comparing the number of padding bits with a value obtained by summing the size of the BSR and the size of a sub-header of the BSR; and transmitting, to the base station according to the comparison result, the BSR including information indicating the presence or absence of a field representing a buffer size for at least one logical channel group (LCG).