Wireless Communication HARQ Feedback for Multicast Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in implementing effective acknowledgement feedback mechanisms for multiple reception devices when using broadcast or multicast transmission methods.
Innovation Solution
The proposed solution involves a wireless communication method where a transmission device sends a first control channel and a first data channel to at least two reception devices, allowing the reception devices to implement acknowledgement feedback for the first transport block transmitted in the first data channel on the first control resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If broadcast or multicast transmission is used to send data to multiple reception devices, then the coverage and reach of the transmission is improved, but the ability to obtain acknowledgement feedback from multiple reception devices deteriorates
Solution Approach 1:
The patent segments the acknowledgement feedback mechanism by allowing different reception devices to send feedback on different uplink resources or at different times. The transmission device divides the feedback collection process into multiple independent channels, enabling simultaneous feedback from multiple reception devices without conflict.
Solution Approach 2:
The patent implements a feedback mechanism where reception devices send acknowledgement information back to the transmission device. The transmission device sends downlink data and receives uplink feedback, creating a closed-loop communication system that enables HARQ operations for broadcast/multicast transmissions.
2Reliability
If acknowledgement feedback from multiple reception devices is implemented, then the reliability of data transmission is improved, but the complexity of the communication protocol deteriorates
Solution Approach 1:
The patent merges the feedback resources of multiple reception devices into shared uplink resources. Instead of allocating dedicated resources to each device, multiple devices share common uplink time-frequency resources, reducing overall system complexity while maintaining the ability to collect feedback from all devices.
Solution Approach 2:
The patent creates universal feedback mechanisms where the same uplink resources can serve multiple reception devices simultaneously. The feedback channel is designed to be multi-functional, handling acknowledgements from any number of reception devices using the same resource pool.
3Productivity
If dedicated resources are allocated for feedback from each reception device, then the feedback collection efficiency is improved, but the resource overhead deteriorates
Solution Approach 1:
The patent resolves resource conflicts by introducing additional dimensions for feedback separation, such as code domain multiplexing or spatial multiplexing. Instead of only using time and frequency dimensions, the system uses code sequences or spatial beams to distinguish feedback from different reception devices, enabling efficient feedback collection without increasing time-frequency resource overhead.
Data Source
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AI summary
Embodiments of the present application provide a wireless communication method, a receiving-end device, and a sending-end device. When the sending-end device transmits data to at least two receiving-end devices, the at least two receiving-end devices can send acknowledgement feedback, and the sending-end device may perform HARQ transmission. The wireless communication method comprises: a receiving-end device receiving a first control channel sent by a sending-end device, wherein the first control channel is used to schedule a first data channel, the first data channel is used to transmit a first transport block, the first transport block comprises information sent to at least two receiving-end devices, and the at least two receiving-end devices comprises said receiving-end device; and the receiving-end device determining a first control resource, wherein the first control resource is used to transmit feedback information corresponding to the first transport block in the first data channel.