Reflective Bearer Mapping for Low-Overhead 5G Data Transmission
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Solution Overview
Problem
Existing 3GPP 5G technologies lack a technical solution for implementing uplink mapping at the terminal side through downlink mapping in the reflective mapping process, leading to inefficiencies and increased overhead.
Innovation Solution
A method and apparatus that enable reflective mapping of inter-layer data transmission channels by selecting appropriate lower-layer bearers based on QoS requirements, allowing downlink data transmission on these bearers and corresponding uplink data transmission without channel-associated signaling, thus reducing overhead and simplifying implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If reflective mapping is implemented without channel-associated signaling, then overhead is reduced and implementation is simplified, but the terminal side lacks the capability to perform uplink mapping through downlink mapping
Solution Approach 1:
The terminal side autonomously performs uplink mapping by reflecting the downlink mapping configuration received from the network side. The terminal uses the same bearer channel for uplink transmission that was used for downlink reception, eliminating the need for separate channel-associated signaling while maintaining mapping adaptability through self-service reflective mapping
Solution Approach 2:
The terminal side receives downlink mapping configuration from the network side and feeds back this mapping information by applying it to uplink transmission. This feedback mechanism enables the terminal to adaptively perform uplink mapping based on the downlink mapping without requiring additional signaling overhead
2Device complexity
If the terminal side performs autonomous mapping based on downlink mapping, then signaling overhead is reduced, but the reliability of mapping configuration may be compromised
Solution Approach 1:
The network side pre-configures the terminal with a set of available lower-layer bearers and their QoS requirements before data transmission. This preliminary configuration enables the terminal to autonomously select appropriate bearers for uplink mapping while ensuring reliability through pre-validated QoS parameters
Solution Approach 2:
The terminal autonomously performs bearer selection and mapping based on pre-configured QoS requirements and downlink mapping observations. This self-service approach reduces signaling overhead while maintaining reliability through rule-based autonomous decision-making validated by pre-configured parameters
3Reliability
If multiple lower-layer bearers are established for an upper-layer data stream, then QoS requirements can be better satisfied, but the device complexity increases
Solution Approach 1:
The upper-layer data stream is segmented and mapped to multiple lower-layer bearers based on different QoS requirements. Each bearer handles specific QoS parameters, allowing the system to satisfy diverse QoS requirements while managing complexity through functional segmentation of bearer responsibilities
Solution Approach 2:
The terminal dynamically selects from multiple pre-configured lower-layer bearers based on current QoS requirements and network conditions. This dynamic selection capability allows the system to satisfy varying QoS requirements while maintaining manageable complexity through adaptive bearer choice rather than permanent multi-bearer configuration
Data Source
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AI summary
A data transmission method, a data transmission apparatus, a network-side device, a terminal, and a computer-readable storage medium are provided. The data transmission method includes selecting, according to QoS requirement of a downlink upper-layer data stream, a lower-layer bearer from a bearer set established for the upper-layer data stream, the bearer set including at least two lower-layer bearers; and mapping the upper-layer data stream onto a selected lower-layer bearer for transmission.