PDCP State Variable Update for Discarded Data Handling
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Solution Overview
Problem
In conventional communication systems, the receive end faces challenges in updating the PDCP entity state variable effectively when the transmit end discards data, leading to data packet loss.
Innovation Solution
The proposed solution involves determining the count value of discarded data and updating the state variable based on this count value, simulating data reception or configuring an empty data packet, to prevent direct updates that could cause packet loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the receive end updates the state variable based on a count value greater than that of discarded data, then the state variable can be updated efficiently, but data packet loss occurs
Solution Approach 1:
The patent applies preliminary action by notifying the receive end of discarded data before the state variable update occurs. The transmit end sends indication information about the discarded data (including count values and quantities) to the receive end, enabling the receive end to proactively adjust its state variable using the count value of the discarded data rather than waiting for subsequent data packets. This prevents the state variable from being updated based on greater count values that would cause packet loss.
2Loss of energy
If the transmit end discards data, then transmission resources are optimized, but the receive end cannot effectively update the state variable
Solution Approach 1:
The patent implements feedback by establishing a communication mechanism where the transmit end informs the receive end about discarded data through indication information. This feedback loop includes the count values and quantities of discarded data, enabling the receive end to accurately update its state variable despite the transmit end's data discarding decisions. The feedback ensures both ends maintain consistent state information without requiring the transmit end to resend discarded data.
3Reliability
If the receive end waits for all data before updating the state variable, then data completeness is ensured, but transmission delay increases
Solution Approach 1:
The patent uses indication information as an intermediary to bridge the gap between data discarding and state variable updates. Instead of waiting for all data or using incomplete information, the receive end receives structured indication information from the transmit end that includes count values and quantities of discarded data. This intermediary information enables the receive end to update the state variable accurately and timely without waiting for actual data packets, reducing delay while maintaining reliability.
Data Source
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AI summary
A communication method and a communication apparatus are provided. The communication method includes: determining first information, where the first information includes information about a count value of first data, and the first data is discarded data; and updating a state variable based on a first count value, where the first count value is the count value of the first data. The state variable is updated based on the count value of the discarded data, to effectively avoid a packet loss.