Aperiodic CQI Triggering via Transport Format Parameters
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Solution Overview
Problem
Current communication systems face challenges in efficiently triggering and transmitting Channel Quality Indicators (CQI) from terminals to base stations without resource allocation interference, especially in scenarios where data buffers are non-empty, leading to potential errors and reduced control over CQI reporting.
Innovation Solution
A control signaling method is introduced that uses a predetermined transport format with a CQI trigger signal, allowing terminals to transmit CQI reports independently without multiplexing with user data, even when data buffers are non-empty, by interpreting specific transport format parameters and CQI trigger signals to enable aperiodic CQI reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CQI is multiplexed with user data transmission, then resource utilization is improved, but control over CQI reporting and error resilience deteriorates
Solution Approach 1:
The patent segments the CQI reporting mechanism from user data transmission by introducing a dedicated aperiodic CQI reporting mode triggered by specific transport format parameters. This allows CQI to be transmitted independently on the uplink shared channel without being multiplexed with user data, thereby maintaining control and error resilience while still utilizing available resources efficiently.
Solution Approach 2:
The patent utilizes changes in transport format parameters (specifically redundancy version parameters) to trigger aperiodic CQI reporting. By interpreting specific parameter values as CQI triggers, the system can dynamically control CQI reporting behavior without requiring separate signaling mechanisms, thus maintaining both resource efficiency and control.
2Reliability
If aperiodic CQI reporting is enabled, then control over CQI transmission is improved, but system complexity increases
Solution Approach 1:
The patent makes the uplink shared channel universally capable of carrying both user data and aperiodic CQI reports by introducing a multi-functionality mode. The same physical channel and processing mechanisms are used for both purposes, triggered by specific transport format parameter interpretations, thereby avoiding the need for separate dedicated CQI channels and reducing overall system complexity.
Solution Approach 2:
The system enables self-service aperiodic CQI reporting where the terminal autonomously determines when to transmit CQI based on interpreting transport format parameters received from the base station. This eliminates the need for complex centralized scheduling of CQI reports, as each terminal independently triggers its own CQI transmission based on the received parameters.
3Reliability
If CQI reporting is decoupled from user data transmission, then error resilience is improved, but resource efficiency may deteriorate
Solution Approach 1:
The patent introduces dynamic CQI reporting behavior where the terminal switches between multiplexed and independent CQI transmission modes based on real-time conditions. The aperiodic reporting is triggered dynamically through transport format parameter interpretation, allowing the system to adapt resource usage to actual needs, thereby maintaining error resilience while optimizing resource efficiency through conditional independent transmission.
Data Source
AI summary
A communication apparatus has a receiver and a transmitter. The receiver, in operation receives a control signal including a Modulation and Coding Scheme (MCS) Index, a channel quality indicator (CQI) trigger and information indicating uplink resource blocks. The transmitter in operation, determines whether to multiplex an aperiodic CQI report with data in an uplink signal based on the MCS Index, the channel quality indicator trigger, the information indicating uplink resource blocks, and a threshold number of resource blocks, and transmits the uplink signal.