Header Field Existence Indicator for LTE Data Transmission
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Solution Overview
Problem
In E-UMTS and LTE systems, the conventional data transmission methods result in significant header overhead, which inefficiently uses radio resources, particularly in voice communication where sequence numbers and length indicators are consistently included, even when unnecessary, leading to increased transmission delay and resource wastage.
Innovation Solution
Incorporating a header field existence indicator in data blocks to indicate the presence or absence of a header, allowing for efficient use of radio resources by minimizing unnecessary header information transmission and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If header fields (sequence numbers, length indicators) are consistently included in data blocks, then data transmission reliability is improved, but header overhead increases and radio resources are wasted
Solution Approach 1:
The patent applies dynamics by making the header structure adaptive rather than static. The MAC header dynamically adjusts its composition based on the presence of subheaders indicated by the E field. When subheaders are not needed, the E field is set to indicate their absence, allowing the header to shrink and avoid unnecessary overhead. This dynamic adaptation resolves the contradiction between maintaining reliability (when subheaders are needed) and optimizing resource efficiency (when they are not needed).
Solution Approach 2:
The patent changes the parameter of header length and composition based on data requirements. By using the E field to indicate the presence or absence of subheaders, the system can alter the header structure parameters to match the actual data transmission needs. This parameter change allows the system to maintain reliability when necessary while minimizing overhead when not required, directly addressing the contradiction between reliability and resource efficiency.
2Manufacturing precision
If comprehensive header information is transmitted, then data processing accuracy is improved, but transmission delay increases
Solution Approach 1:
The patent extracts only the necessary header information required for accurate data processing. By using the E field to indicate whether subheaders are present, the system extracts and transmits only the minimal required header fields. When subheaders are not needed, they are completely omitted rather than transmitted as unnecessary data. This extraction principle resolves the contradiction by maintaining processing accuracy through selective inclusion of essential header information while reducing transmission delay by eliminating redundant data.
3Device complexity
If fixed header structure is used for all data blocks, then system complexity is reduced, but radio resource utilization deteriorates
Solution Approach 1:
The patent segments the header structure into a basic MAC header and optional subheaders. The E field acts as a segmentation indicator that divides the header into necessary and optional components. This segmentation allows the system to maintain a simple basic header structure while optionally adding subheaders only when required by the data content. This resolves the contradiction by keeping the core system simple while enabling flexible resource utilization through selective segmentation based on actual transmission needs.
Data Source
AI summary
A method for transmitting and receiving data between a base station and a terminal in an E-UMTS (Evolved Universal Mobile Telecommunications System) or an LTE (Long Term Evolution) system is disclosed. A header overhead of data transmitted from a wireless end can be minimized by adding a header field existence indicator indicating presence or absence of a header in an upper data block to a data block of a lower layer, to thus effectively use radio resources.