SRS Transmission Control for LTE Terminal Throughput
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Solution Overview
Problem
In LTE networks, the transmission of dynamic aperiodic SRS (A-SRS) can lead to erroneous detection of control information by terminals, resulting in incorrect SRS resource allocation and potential interference with other cells, which degrades system throughput due to differences in understanding between the base station and terminals regarding SRS transmission and resource usage.
Innovation Solution
A communication apparatus with a detection section to identify control information for SRS transmission requests and a control section that manages SRS transmission based on predetermined rules, such as transmitting only the first detected request within an effective period, ensuring accurate SRS resource allocation and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dynamic aperiodic SRS transmission is implemented to enable frequent SRS requests during data bursts, then the system can obtain more frequent channel quality information, but terminals may erroneously detect control information and transmit SRS in incorrect resources, causing interference with other cells and degrading system throughput
Solution Approach 1:
The patent applies preliminary action by establishing a predetermined rule before SRS transmission occurs: when multiple trigger indications are detected within an effective period, only the first one is processed and subsequent ones are ignored. This pre-established rule prevents terminals from erroneously responding to multiple trigger indications, thereby avoiding SRS transmission in incorrect resources and interfering with other cells, while still enabling frequent channel quality measurements through the dynamic aperiodic SRS mechanism
2Adaptability or versatility
If multiple control information pieces are processed when detected within an effective period, then the terminal can respond to all SRS transmission requests, but it may transmit SRS in incorrect resources due to erroneous detection, causing resource misallocation and system throughput degradation
Solution Approach 1:
The patent applies preliminary action by pre-establishing a processing rule that prioritizes the first detected trigger indication and ignores subsequent ones within the same effective period. This rule is set in advance to prevent terminals from incorrectly processing multiple trigger indications, which would lead to SRS transmission in wrong resources and system throughput degradation, while still maintaining responsive SRS transmission capability
Solution Approach 2:
The patent applies the extraction principle by isolating and processing only the first trigger indication while excluding subsequent trigger indications within the same effective period from processing. This extraction approach ensures that terminals respond reliably to SRS transmission requests without being confused by multiple overlapping trigger indications, thereby preventing resource misallocation and maintaining system throughput
Data Source
AI summary
Provided are a communication device and an SRS transmission method capable of reducing the possibility of a difference in recognition between the presence or absence of an SRS transmission between a base station and a terminal or of an SRS resource so as to prevent degradation of system throughput. At a terminal (200), a reception processing unit (203) detects control information indicating whether or not to request transmission of a sounding reference signal (SRS), whereupon a transmission signal forming unit (207) transmits an A-SRS by way of control by a transmission control unit (206) on the basis of control information. The transmission control unit (206) determines whether or not to execute SRS transmission on the basis of an “SRS Transmission Execution Rule” and the reception status of trigger information.