LTE Rate Adaptation via Data Buffering and Discarding
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Solution Overview
Problem
In LTE communication systems, the limited data transmission bandwidth resources lead to deteriorating data transmission quality and potential failures, as the data transmission rate cannot be adjusted without causing service interruptions, such as deleting or setting up cells, which affects system performance.
Innovation Solution
The method involves buffering frequency domain data from occupied data bearer units and discarding data from idle units, allowing the transmission of buffered data at a lower rate without changing the spectral bandwidth, thus adjusting the data transmission rate while maintaining system service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spectral bandwidth setting of the system is changed to adjust the data transmission rate, then the data transmission rate can be adjusted, but service interruption occurs due to cell deletion or setup
Solution Approach 1:
The patent segments the data transmission process by introducing a rate adaptation layer that separates the spectral bandwidth configuration from the actual data rate control. This layer divides data into multiple streams with different rates and selectively forwards them based on current transmission conditions, allowing rate adjustment without changing the underlying spectral bandwidth setting or interrupting service.
Solution Approach 2:
The rate adaptation layer acts as an intermediary between the spectral bandwidth configuration and the actual data transmission. It receives data at one rate and forwards it at another rate by buffering, segmenting, and reassembling data packets, thereby enabling rate adjustment without direct modification of spectral bandwidth settings that would cause service interruption.
2Stability of the object's composition
If the quantity of RBs is determined based on spectral bandwidth, then the system configuration is stable, but the data transmission rate cannot be adjusted dynamically
Solution Approach 1:
The patent introduces dynamic rate adaptation within a stable spectral bandwidth framework. The system maintains fixed RB allocation for stability while the rate adaptation layer dynamically adjusts the effective data transmission rate by selectively buffering and forwarding data packets based on real-time transmission conditions, achieving flexibility without compromising configuration stability.
Solution Approach 2:
The rate adaptation layer performs preliminary actions by pre-buffering data packets and maintaining a pool of data ready for transmission. When rate adjustment is needed, it can immediately control the forwarding rate without requiring reconfiguration of spectral bandwidth or RB allocation, thus maintaining system stability while enabling rapid rate adaptation.
3Quantity of substance
If data transmission bandwidth resources are limited, then the system operates within resource constraints, but data transmission quality deteriorates and transmission failures occur
Solution Approach 1:
The patent changes the parameter of data transmission rate independently of the spectral bandwidth parameter. By introducing rate adaptation that operates at the packet forwarding level rather than the spectral allocation level, the system can adjust the effective transmission rate to match available bandwidth resources, preventing transmission failures and maintaining quality even when bandwidth is limited.
Data Source
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AI summary
The present invention discloses a method and an apparatus for adjusting a data transmission rate, where the method includes: acquiring information for resource scheduling that is determined by a base station according to information about resource quantity, where the information about resource quantity indicates a quantity of resources that can be scheduled by the base station; receiving first frequency domain data transmitted at a first transmission rate; according to information for resource scheduling, buffering first frequency domain data borne by an occupied data bearer unit, and discarding first frequency domain data borne by an idle data bearer unit; and transmitting, at a second transmission rate, the buffered first frequency domain data, where the second transmission rate is lower than the first transmission rate. According to the method and the apparatus for adjusting a data transmission rate, by buffering the first frequency domain data borne by the occupied data bearer unit, and by discarding the first frequency domain data borne by the idle data bearer unit, the data transmission rate can be adjusted while a service is kept running, so as to adapt to different data transmission conditions, thereby being able to improve system transmission performance.