Wireless MAC Padding Data Utilization
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Solution Overview
Problem
In wireless communication systems, especially in LTE, the generated MAC padding is often meaningless due to inaccurate prediction of buffer states and resource allocation, leading to inefficiencies in data transmission.
Innovation Solution
A method and apparatus that utilize a controller to generate and store data in padding spaces, replacing meaningless MAC padding with meaningful data, allowing for efficient use of allocated resources by determining the size of padding and allocating resources accordingly, whether in Unacknowledged Mode (UM) or Acknowledged Mode (AM), and managing resource allocation across multiple Time Transmission Intervals (TTIs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MAC padding is generated to fill extra space in MAC PDU, then the MAC PDU structure is completed and transmission format is standardized, but transmission efficiency deteriorates due to meaningless padding bits occupying valuable resource space
Solution Approach 1:
The patent converts the harmful effect of MAC padding (wasted resource space) into a beneficial effect by allowing the padding space to carry additional data. Specifically, when the MAC PDU has extra space after including all control MAC SDUs and data MAC SDUs, instead of filling it with meaningless padding bits, the system utilizes this space to transmit additional data MAC SDUs, thereby transforming the waste into useful transmission capacity
Solution Approach 2:
The patent changes the parameter of the padding space from 'meaningless filler' to 'useful data carrier'. By modifying the content and purpose of the padding region, the system enables it to transport meaningful data, thus improving overall transmission efficiency without changing the fundamental MAC PDU structure
2Ease of manufacture
If resource allocation is performed based on buffer state prediction and MCS/RB combination, then resource allocation is simplified and processing is easier, but allocation precision deteriorates leading to inaccurate resource distribution
Solution Approach 1:
The patent applies preliminary action by pre-determining the resource allocation strategy based on buffer state prediction before actual transmission. The system predicts the buffer state and pre-calculates the appropriate MCS and RB combination, allowing the base station to prepare the resource allocation in advance. This preliminary planning simplifies the real-time allocation process while maintaining reasonable precision through the predictive approach
3Quantity of substance
If base station continuously performs allocation until entire resources become padding, then resource allocation is maximized, but transmission efficiency deteriorates due to excessive meaningless padding
Solution Approach 1:
The patent transforms the harmful situation of excessive padding into a beneficial one by utilizing the padding space for data transmission. When the base station performs continuous allocation and resources become fully utilized, any remaining padding space is converted into additional data transmission capacity, thereby improving transmission efficiency while maintaining maximum resource utilization
Solution Approach 2:
The patent applies multi-functionality to the MAC PDU structure by enabling the padding region to serve dual purposes: maintaining structural integrity as padding while simultaneously carrying additional data. This allows the same resource space to fulfill both structural and data transmission functions, improving overall system efficiency
Data Source
AI summary
An apparatus for transmitting data in a wireless communication system is provided. The apparatus includes a controller including a processor configured to generate and store data in a padding space, when padding exists in a data space, and a transmitter configured to transmit the data stored in the padding space.