ACK/NACK Bundling for Wireless Uplink Resource Efficiency
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently transmitting and receiving usage change information, particularly in dynamically changing radio resource usage based on system load states, which affects the reliability and efficiency of ACK/NACK information transmission.
Innovation Solution
A method for user equipment in a wireless communication system to transmit ACK/NACK information based on a channel selection scheme, where the confirmation message is bundled with ACK/NACK information and transmitted through uplink resources configured depending on the success or failure of receiving reconfiguration downlink control information, using PUCCH format 3 or PUSCH, and adjusting the uplink resource allocation based on the number of downlink subframes interconnected to a specific uplink subframe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ACK/NACK information is transmitted independently from reconfiguration DCI confirmation, then transmission reliability is maintained, but signaling overhead and resource allocation complexity increase
Solution Approach 1:
The patent combines ACK/NACK information and reconfiguration DCI confirmation into a single bundled message transmitted through the same uplink resource. This merging reduces signaling overhead and simplifies resource allocation while maintaining transmission reliability through the bundled confirmation mechanism.
Solution Approach 2:
The uplink resource is designed to serve multiple functions: transmitting both ACK/NACK information and reconfiguration DCI confirmation. This multi-functional approach reduces the need for separate dedicated resources, thereby lowering overall system complexity while preserving reliability through proper bundling protocols.
2Reliability
If separate uplink resources are allocated for ACK/NACK and reconfiguration confirmation, then transmission reliability is improved, but resource allocation overhead and system complexity increase
Solution Approach 1:
The patent merges ACK/NACK information and reconfiguration DCI confirmation into a single bundled transmission, eliminating the need for separate uplink resources. This reduces resource overhead while maintaining reliability through the bundled confirmation mechanism that ensures both messages are transmitted together.
Solution Approach 2:
A single uplink resource is designed to handle multiple functions: transmitting both ACK/NACK and reconfiguration confirmation. This universal resource allocation reduces the total quantity of resources needed while maintaining transmission reliability through proper message bundling and confirmation protocols.
3Adaptability or versatility
If dynamic radio resource allocation is implemented, then system adaptability and efficiency are improved, but the complexity of managing ACK/NACK transmission increases
Solution Approach 1:
The patent implements dynamic uplink resource allocation for bundled ACK/NACK and reconfiguration confirmation transmission, allowing the system to adapt to varying load conditions. The dynamic allocation manages complexity by adjusting resource assignment based on actual needs while maintaining reliable transmission through the bundled confirmation mechanism.
Solution Approach 2:
The system dynamically changes uplink resource parameters (time, frequency, power) for bundled ACK/NACK and reconfiguration confirmation transmission based on system conditions. This parameter adjustment provides adaptability while managing complexity through standardized bundling procedures that remain consistent regardless of resource allocation changes.
Data Source
AI summary
The present invention relates to a method for enabling a terminal to transmit and receive a signal in a wireless communications system and an apparatus therefor. More specifically, the method includes the steps of: receiving physical downlink shared channel (PDSCH) data and reconfiguration downlink control information (DCI); and transmitting at least one of the information of ACK/NACK (acknowledgement/Negative Acknowledgement) for downlink data and the answer message corresponding to the reconfiguration downlink control information, characterized in that the answer message represents whether to succeed in receiving the reconfiguration downlink control information.