RLC Entity SDU Delivery from Erroneous Packets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In current wireless communication systems, air interface resources are wasted due to the discarding of incorrectly received data packets, which affects decoding quality and resource utilization.
Innovation Solution
A method where user equipment (UE) and base stations determine and deliver service data units (SDUs) from erroneous data packets to the radio link control (RLC) entity after maximum retransmissions, allowing the SDUs to be sent to upper layers, utilizing configuration information and indication parameters to facilitate correct delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If incorrectly received data packets are discarded after maximum retransmissions, then transmission reliability is maintained, but air interface resources are wasted
Solution Approach 1:
The patent applies discarding and recovering by extracting and delivering usable service data units (SDUs) from erroneously received data packets before discarding the corrupted packets. The MAC layer delivers SDUs to the RLC layer even when the data packet contains errors, thereby recovering valuable data content while discarding only the corrupted transport containers. This resolves the contradiction by preventing resource waste through SDU recovery while maintaining reliability through selective delivery.
2Reliability
If incorrectly received data packets are discarded, then data integrity is ensured, but resource utilization deteriorates
Solution Approach 1:
The patent applies segmentation by separating the service data unit (SDU) from the data packet structure. The MAC layer extracts and delivers the SDU content to the RLC layer independently of the packet's error status. This segmentation allows the system to preserve valuable data content while discarding only the corrupted transport containers, thereby improving resource utilization without compromising data integrity through selective delivery mechanisms.
3Productivity
If SDU delivery from erroneous packets is enabled, then resource utilization improves, but complexity of error handling increases
Solution Approach 1:
The patent applies preliminary action by performing SDU extraction and delivery at the MAC layer before the data packet is fully processed and identified as erroneous. The MAC layer delivers SDUs to the RLC layer based on available information without waiting for complete error verification. This preliminary action simplifies error handling by resolving SDU delivery early in the processing chain, improving resource utilization while avoiding complex post-error analysis.
Data Source
Figure 1
Figure 2
Figure 3~3a
AI summary
A method and an apparatus for transmitting a data packet are provided. A user equipment UE determines that service data unit SDU delivery needs to be performed for an erroneous data packet born on a radio bearer RB of a service. If the received data packet is not received correctly after maximum retransmission times are achieved, the UE determines that a received data packet is the erroneous data packet. The UE delivers the SDU in the erroneous data packet to a radio link control RLC entity corresponding to the RB, and the RLC entity in the UE sends the SDU to an upper layer of the RLC entity. By means of the above-mentioned solution, since the SDU in the erroneous data packet is delivered to the radio link control RLC entity corresponding to the RB after determining that SDU delivery needs to be performed for the erroneous data packet born on the RB of the service, the delivery of the erroneous data packet may be achieved, so that an air interface resource may be effectively utilized and the decoding quality may be improved.