Uplink Scheduling Request Periodicity Configuration for LTE Delay Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, the existing uplink resource scheduling request periodicities, such as 5 ms, result in significant delays for user data transmission, particularly from an Active-"dormant" status transition, leading to latency issues that hinder timely data accommodation.
Innovation Solution
The introduction of 1 ms and 2 ms transmission periodicity options for uplink resource scheduling requests, allowing for more flexible configuration and reduced delays by providing additional opportunities for user equipment to request uplink resources, thereby approaching the desired 10 ms delay requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the uplink resource scheduling request periodicity is set to 5 ms or longer, then the system complexity is reduced and resource configuration is simplified, but the user data transmission delay increases significantly
Solution Approach 1:
The patent applies dynamics by making the scheduling request periodicity configurable rather than fixed. The system allows dynamic selection between 5 ms periodicity (for low complexity) and 1 ms periodicity (for low delay), enabling the network to adapt the timing characteristics to different service requirements and traffic conditions, thus resolving the contradiction between delay and complexity
Solution Approach 2:
The patent changes the parameter of scheduling request periodicity from a fixed value to a configurable parameter with multiple options (1 ms, 5 ms). This parameter change allows the system to optimize between delay and complexity by selecting appropriate periodicity values based on specific network conditions and service requirements
2Productivity
If the scheduling request periodicity is extended to reduce signaling overhead, then the resource consumption is reduced, but the uplink data transmission latency increases
Solution Approach 1:
The patent enables dynamic configuration of scheduling request periodicity, allowing the system to switch between 1 ms and 5 ms periods. This dynamic adjustment optimizes the balance between productivity (faster transmission with 1 ms) and resource consumption (lower overhead with 5 ms), resolving the contradiction between transmission speed and delay
3Loss of time
If more frequent scheduling request opportunities are provided to reduce transmission delay, then the user data latency is reduced, but the system resource consumption and signaling overhead increase
Solution Approach 1:
The patent applies dynamics by allowing flexible configuration of scheduling request periodicity based on actual needs. The system can use 1 ms periodicity when low latency is critical (accepting higher overhead) and 5 ms periodicity when resource efficiency is prioritized (tolerating higher latency), thus dynamically resolving the contradiction between latency reduction and energy loss
Solution Approach 2:
The patent changes the periodicity parameter to be configurable with multiple values (1 ms, 5 ms), enabling the system to adjust the frequency of scheduling requests according to traffic conditions and service requirements, optimizing the trade-off between latency and signaling overhead
Data Source
AI summary
A method for a user equipment sending an uplink resource scheduling request in a long term evolution mobile communication system and the user equipment thereof are provided. The present invention relates to a technique for the user equipment sending the uplink resource scheduling request in a long term evolution system, for reducing the user data transmission delay. The embodiments of the present invention set the minimum alternative option of the scheduling request transmission cycle configuration parameter as 2 ms or 1 ms, that is to say, add 2 ms or 1 ms, or 2 ms and 1 ms to the alternative option of the scheduling request transmission cycle configuration parameter, therefore, improving the flexibility of the whole system in the scheduling request transmission cycle configuration. When the data delay is required to be less, the user data transmission delay can be reduced, by using the 2 ms or 1 ms scheduling request transmission cycle configuration, to the delay requirement of 10 ms as close as possible.