RLC Entity Segmentation for Requirement-Based Network-Coded Packets
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Solution Overview
Problem
Existing network coding solutions result in resource wastage due to unnecessary redundant transmission of network-coded packets at both the user equipment (UE) and the base station, leading to inefficiencies in uplink and downlink communications.
Innovation Solution
Introduce separate radio link control (RLC) entities for transmitting network-coded redundant and original packets, enabling requirement-based transmission by prioritizing the transmission of network-coded redundant packets when insufficient original packets are successfully transmitted, thereby reducing resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-coded redundant packets are transmitted together with network-coded original packets using a single RLC entity, then transmission reliability is improved through network coding, but resource overhead increases due to unnecessary redundant transmission
Solution Approach 1:
The patent segments the transmission function by introducing separate RLC entities: a first RLC entity dedicated to transmitting network-coded original packets and a second RLC entity dedicated to transmitting network-coded redundant packets. This segmentation allows the system to selectively transmit only the necessary packet type based on reception status, thereby maintaining transmission reliability while reducing unnecessary resource overhead.
2Device complexity
If network-coded redundant packets are transmitted using the same RLC entity as original packets, then implementation complexity is reduced, but transmission efficiency decreases due to inability to perform requirement-based transmission
Solution Approach 1:
The patent implements dynamic transmission by configuring the second RLC entity to transmit network-coded redundant packets only when the quantity of successfully transmitted network-coded original packets is insufficient. This dynamic approach, controlled through scheduling information from the access network device, optimizes transmission efficiency by adapting to real-time reception status while maintaining manageable implementation complexity through standardized protocol extensions.
Data Source
AI summary
This application provides a communication method and apparatus, where a first radio link control (RLC) entity is introduced to transmit a network-coded redundant packet, and a second RLC entity is introduced to transmit a network-coded original packet, to support requirement-based transmission of the network-coded redundant packet. In some embodiments, an apparatus receives scheduling information from an access network device. The apparatus obtains a network-coded redundant packet through a first RLC entity, generates a first transport block (TB) based on the network-coded redundant packet, and sends the first TB to the access network device, where the first TB includes the network-coded redundant packet. The first RLC entity is configured to transmit the network-coded redundant packet. In this way, the access network device schedules the network-coded redundant packet by using the scheduling information only when the network-coded redundant packet needs to be scheduled, avoiding resource waste by reducing unnecessary and redundant transmission.