MAC Residence-Time Scheduling for Low-Latency User Equipment
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Solution Overview
Problem
The introduction of mobile communication systems based on 3GPP standards into industrial networks, which require strict real-time operations, is hindered by delays due to processing in the MAC layer, making it difficult to transmit data requiring low latency effectively.
Innovation Solution
The MAC layer of the user equipment measures the residence time of unsent data and allocates resources based on this time to prioritize data transmission, ensuring that data is transmitted before a residence upper limit is reached, and optionally notifies the base station of time information related to this residence time to facilitate better resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If logical channel prioritization processing is performed in the MAC layer, then data transmission order is controlled, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by measuring the residence time of data in the buffer before transmission and using this pre-measured time information to make priority decisions. The MAC layer pre-calculates which data should be transmitted first based on residence time, allowing faster transmission without complex real-time prioritization processing during actual transmission.
Solution Approach 2:
The patent implements self-service by having the MAC layer automatically measure residence time and determine transmission priority without requiring complex external scheduling or control from higher layers. The system serves itself by using internally measured time data to make autonomous transmission decisions, reducing processing overhead.
2Loss of time
If residence time measurement and resource allocation based on residence time is implemented, then low latency data transmission is achieved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by using residence time as a dynamic parameter to determine resource allocation priority. Instead of using fixed priority rules, the system continuously measures and updates the residence time parameter, allocating resources based on current time conditions. This allows adaptive latency reduction without requiring complex multi-parameter decision algorithms.
Data Source
AI summary
A communication control method according to a first aspect is a method executed by a user equipment. The communication control method includes the step of measuring a residence time of unsent data to be transmitted by the user equipment to a base station via a logical channel and the step of allocating, based on the residence time, a resource for data transmission to the logical channel.