Headerless MAC PDU Transmission for Wireless Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving data and control signals due to limited resources, particularly in overcoming latency issues that affect performance in delay-sensitive applications.
Innovation Solution
The method involves generating and transmitting Medium Access Control (MAC) protocol data units (PDUs) with zero headers, which include data for logical channels or MAC control elements without MAC subheaders, allowing for efficient use of remaining uplink resources and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAC subheaders are included in every MAC PDU, then data transmission reliability is improved through proper formatting and identification, but transmission latency increases and resource efficiency decreases
Solution Approach 1:
The patent extracts the MAC subheader from the MAC PDU structure entirely, creating a headerless MAC PDU format. This removal eliminates the overhead that causes latency while maintaining reliability through alternative mechanisms such as pre-configured logical channel information and explicit end indicators that allow the receiver to properly identify and process data units without traditional headers
Solution Approach 2:
The patent changes the structural parameters of the MAC PDU by removing the MAC subheader component and modifying the MAC subPDU format. This parameter change reduces the size and complexity of each transmission unit, directly lowering latency while maintaining necessary functionality through alternative structuring with explicit end indicators and pre-configured channel information
2Measurement precision
If MAC subheaders are included in every MAC PDU, then data identification and processing accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent removes the MAC subheader from each MAC PDU, eliminating the overhead that reduces resource efficiency. Data identification accuracy is maintained through alternative mechanisms including pre-configured logical channel information, explicit end indicators, and receiver-side processing that can correctly identify data units without traditional header structures
Solution Approach 2:
The patent enables the receiver to self-determine data unit boundaries and characteristics through explicit end indicators embedded in the data stream and pre-configured information, eliminating the need for traditional headers while maintaining accurate data identification and improving resource utilization
3Loss of time
If zero header information is used in MAC PDUs, then transmission latency is reduced and resource efficiency is improved, but complexity in data parsing and identification increases
Solution Approach 1:
The patent introduces explicit end indicators as intermediary markers within the headerless MAC PDU structure. These indicators serve as mediators that help the receiver identify data unit boundaries and parsing points without requiring traditional headers, thereby reducing latency while managing parsing complexity through clear delimitation markers
Solution Approach 2:
The patent uses pre-configured logical channel information and explicit end indicators that are established beforehand, allowing the receiver to parse data more efficiently by having reference information available in advance, thus reducing the complexity of real-time parsing while maintaining low latency
Data Source
AI summary
In the present disclosure, a transmitting device receives zero header information from a receiving device, generates a MAC PDU based on the zero header information, and transmits the MAC PDU. The zero header information may include information regarding a logical channel or MAC control element (CE). The MAC PDU may include a MAC subPDU containing data of the logical channel or the MAC CE without corresponding MAC subheader.