RLC Scheduling for On-Demand Network-Coded Redundant Packets
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Solution Overview
Problem
Existing communication methods waste resources due to unnecessary redundant transmission of network-coded packets at the PDCP layer, leading to inefficiencies in both uplink and downlink transmissions.
Innovation Solution
Introduce separate RLC entities for transmitting network-coded redundant and original packets, allowing for requirement-based transmission triggered when insufficient original packets are successfully transmitted, thereby avoiding redundant transmission and conserving resources.
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, 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 independent control and scheduling of original and redundant packet transmissions, enabling the system to transmit only when necessary, thus reducing resource overhead while maintaining transmission reliability
Solution Approach 2:
The patent implements dynamic transmission control where the base station determines whether to schedule the second RLC entity for redundant packet transmission based on the reception status of original packets from the first RLC entity. This dynamic approach allows the system to adapt transmission behavior to actual channel conditions and receiver status, avoiding unnecessary redundant transmissions and reducing resource overhead
2Reliability
If network-coded redundant packets are always scheduled for transmission, then transmission reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the base station monitors the reception status of network-coded original packets transmitted by the first RLC entity and uses this feedback to dynamically control the scheduling of the second RLC entity for redundant packet transmission. This feedback-driven approach ensures that redundant packets are transmitted only when original packets were not successfully received, improving resource utilization while maintaining reliability
Solution Approach 2:
The patent implements dynamic transmission control where the base station determines whether to schedule the second RLC entity for redundant packet transmission based on the reception status of original packets from the first RLC entity. This dynamic approach allows the system to adapt transmission behavior to actual channel conditions and receiver status, avoiding unnecessary redundant transmissions and reducing resource overhead
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.