RLC Status Report PDU Format Selection for Overhead Reduction
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Solution Overview
Problem
The existing RLC status report mechanism in LTE protocols has a single inflexible format for feedback, which makes it difficult to meet the requirements of various scenarios, leading to inefficient retransmission and increased overhead in error reporting.
Innovation Solution
A method where a user equipment receives configuration information from a network device that includes multiple control PDU formats, allowing it to select and generate a status report control PDU with varying formats, including maximum sequence numbers and ranges of sequence numbers, to efficiently report successful and unsuccessful PDU reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single format status report PDU is used according to LTE RLC protocol, then the protocol implementation is simple, but it is inflexible and difficult to meet the requirements of various scenarios
Solution Approach 1:
The patent applies dynamics by making the status report PDU format selectable rather than fixed. The receiving end can dynamically choose different formats (first format with individual sequence numbers or second format with range information) based on the actual reception status and scenario requirements, transforming a static single-format system into a dynamic multi-format system that adapts to different conditions
Solution Approach 2:
The patent changes the parameter of PDU format type from a fixed value to a variable that can be selected from multiple options. By introducing different format types with different structures (individual sequence numbers vs. range start/end numbers), the system can adjust the information representation parameters according to the specific scenario, achieving flexibility without requiring complete protocol redesign
2Loss of information
If individual sequence numbers are reported for each unsuccessfully received PDU, then the feedback information is complete, but the feedback overhead increases
Solution Approach 1:
The patent merges multiple individual sequence number reports into a single range representation. Instead of reporting each missing PDU sequence number separately (e.g., 100, 101, 102, 103 as four separate values), the system merges them into a range (start=100, end=103), which conveys the same information with fewer elements. This merging principle directly reduces feedback overhead while maintaining information completeness
Solution Approach 2:
The patent applies partial action by selectively using range representation only when sequence numbers are continuous or can be grouped, while still maintaining the option to report individual sequence numbers when needed. This partial application of range merging optimizes overhead reduction without sacrificing the ability to provide complete information in all cases
Data Source
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AI summary
The present invention discloses a method for transmitting an RLC layer status report control PDU, which includes: receiving, by a user equipment, configuration information sent by a network device, wherein the configuration information includes at least one control PDU format; selecting, by the user equipment, a control PDU format from the at least one control PDU format to generate a status report control PDU, and reporting the status report control PDU. An embodiment of the present invention also provides a related device. With embodiments of the present invention, the status report control PDU reported by the user equipment can have various formats, which can meet the requirements of various scenarios in some cases.