HARQ Acknowledgement Resource Allocation in Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in handling hybrid automatic repeat request (HARQ) acknowledgement messages, leading to increased overhead and reduced capacity in uplink transmissions.
Innovation Solution
A method where the network selects communication devices based on specified rules and always responds with positive HARQ acknowledgement messages via physical indicator channels (PHICHs), dynamically deciding resources to minimize retransmissions and reduce acknowledgement transmission overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network transmits HARQ acknowledgement messages for all uplink transmissions, then reliability of uplink communication is improved, but overhead of acknowledgement transmissions increases
Solution Approach 1:
The patent applies partial action by transmitting HARQ acknowledgement messages selectively rather than for all uplink transmissions. The network determines whether to transmit HARQ ACK based on whether the uplink transmission was successfully received, applying the acknowledgement action only when necessary (i.e., when retransmission is needed), thereby reducing overall overhead while maintaining reliability.
2Quantity of substance
If the network transmits HARQ acknowledgement messages for all uplink transmissions, then capacity of acknowledgement transmissions is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent implements partial action by limiting HARQ acknowledgement message transmissions to only those cases where the uplink transmission requires confirmation or retransmission. This selective approach maintains the necessary capacity for acknowledgement transmissions while avoiding the waste of radio resources that would occur if acknowledgements were transmitted for every uplink transmission regardless of need.
3Quantity of substance
If the network selectively transmits HARQ acknowledgement messages, then overhead of acknowledgement transmissions is reduced, but reliability of uplink communication may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the network evaluates the outcome of each uplink transmission and determines whether HARQ acknowledgement message transmission is necessary. This feedback-based selective transmission ensures that acknowledgements are sent only when the uplink transmission was not successfully received, thereby maintaining reliability while reducing overhead. The feedback loop closes the communication cycle by providing necessary confirmation or error indication.
Data Source
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AI summary
A method of handling hybrid automatic repeat request (HARQ), acknowledgement responses in a network of a wireless communication system is disclosed. The method comprises selecting a plurality of communication devices of the wireless communication system when the plurality of communication devices conform to a specified rule (302); and always responding positive HARQ acknowledgement messages to the plurality of communication devices (304).