Feedback Information Multiplexing for Wireless Resource Efficiency
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Solution Overview
Problem
Existing mobile communication standards, such as IEEE 802.20, inefficiently use wireless resources for feedback information transmission as multiple mobile terminals share the same channel, transmit with uniform processing gain and power, and waste resources due to cyclic allocation, failing to distinguish the importance of different feedback types.
Innovation Solution
A method and apparatus that classify feedback payloads into classes, apply distinct codes and transmission powers, and orthogonally modulate them for efficient multiplexing and transmission, allowing adaptive channel allocation based on channel conditions and feedback cycles, enabling differentiated processing gains and powers for various payload classes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple mobile terminals share the same feedback channel with uniform transmission parameters, then device complexity is reduced and ease of operation is improved, but wireless resource efficiency deteriorates and productivity decreases
Solution Approach 1:
The patent applies local quality by assigning different transmission parameters (processing gain, transmission power, cyclic shift values) to different feedback information types and mobile terminals based on their specific channel conditions and feedback priorities. This allows each terminal or feedback type to use optimized parameters tailored to its requirements, resolving the contradiction between uniform simplicity and differentiated efficiency.
2Device complexity
If cyclic feedback channel allocation is used for intermittently fed back information, then feedback channel setup is simplified, but wireless resource waste increases and productivity decreases
Solution Approach 1:
The patent implements dynamic feedback channel allocation where the base station adaptively assigns feedback channel resources based on actual feedback needs and channel conditions. Instead of fixed cyclic allocation, the system dynamically adjusts resource allocation to match intermittent feedback requirements, reducing waste while maintaining simple channel setup through centralized control.
3Device complexity
If all feedback information is transmitted with the same processing gain and transmission power, then device complexity is reduced and ease of operation is improved, but reception performance deteriorates and reliability decreases
Solution Approach 1:
The patent changes transmission parameters (processing gain, transmission power, cyclic shift values) based on feedback information type, channel conditions, and priority levels. Different parameter sets are assigned to different feedback scenarios, allowing the system to maintain low device complexity through standardized procedures while achieving high reception performance through adaptive parameter optimization.
4Reliability
If differentiated transmission parameters are applied to various feedback information types, then reception performance is improved and reliability is enhanced, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent uses feedback mechanisms where the base station receives channel quality information and feedback priorities from mobile terminals, then adjusts transmission parameters accordingly. This feedback loop allows the system to achieve high reception performance through adaptive parameter selection while keeping device complexity manageable by centralizing the decision-making process at the base station.
Data Source
AI summary
Disclosed is an apparatus for transmitting feedback information to a base station. The feedback information transmitting apparatus receives channel allocation information, generates a plurality of payloads regarding feedback information, and multiplexes the plurality of payloads in terms of a plurality of classes so as to generate a plurality of multiplexed payloads. Subsequently, the plurality of multiplexed payloads are code multiplexed so as to generate a code division multiplexing symbol, and a channel code is applied to the code division multiplexing symbol. Then, the code division multiplexing signal applied with the channel code is transmitted to a base station through a wireless resource. Accordingly, a feedback channel that is adaptive to a channel condition is configured, such that a wireless resource for a feedback channel can be efficiently used.