Sidelink Multicast Uplink Relay Transmission for Network Efficiency
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Solution Overview
Problem
Uplink data transmission efficiency is low when a remote device sends data to a radio access network device through multiple relay devices due to inefficient use of sidelink and Uu links.
Innovation Solution
Implementing a data transmission method that involves determining a sidelink multicast identifier for sending uplink data to multiple relay devices in a multicast manner, along with configuring sidelink bearers and adjusting communication modes between the remote device and relay devices to optimize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple unicast links are used for uplink data transmission, then network coverage is improved, but transmission efficiency decreases
Solution Approach 1:
The patent combines multiple unicast connections into a single multicast connection for uplink data transmission. The remote device sends uplink data to multiple relay devices through one multicast link instead of maintaining separate unicast links, thereby improving transmission efficiency while preserving network coverage benefits.
Solution Approach 2:
The multicast connection serves multiple relay devices simultaneously, making a single connection perform the function of multiple unicast connections. This multi-functionality allows the remote device to communicate with multiple relay devices through one optimized transmission path.
2Reliability
If multiple relay devices are used for data forwarding, then reliability is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple relay device interactions into a single multicast group management process. Instead of managing separate connections with each relay device, the system uses one multicast group identifier to coordinate all relay devices, reducing management complexity while maintaining reliability through multiple forwarding paths.
Solution Approach 2:
The multicast connection copies data to multiple relay devices simultaneously rather than establishing individual connections. This copying approach simplifies the system architecture by using a single transmission mechanism that naturally replicates data across multiple recipients.
3Productivity
If multicast transmission is used for uplink data, then transmission efficiency is improved, but compatibility with existing unicast systems decreases
Solution Approach 1:
The patent implements dynamic switching between unicast and multicast modes based on service requirements and link conditions. The system can adaptively select the appropriate transmission mode, allowing efficient multicast operation when beneficial while maintaining compatibility with traditional unicast systems when needed.
Solution Approach 2:
The system changes the transmission mode parameter from fixed unicast to flexible multicast/unicast selection. By adjusting this parameter based on service type, link quality, and network conditions, the system achieves improved efficiency while preserving compatibility with existing unicast-based networks.
Data Source
AI summary
Methods and apparatus are provided for data transmission. A remote device determines a sidelink multicast identifier identifying multicast between the remote device and a plurality of relay devices and sends uplink data to the plurality of relay devices in a multicast manner based on the sidelink multicast identifier. The uplink data is data sent by the remote device to a radio access network device. The remote device determines the sidelink multicast identifier, and sends the sidelink multicast identifier to the relay device to transmit the uplink data to the radio access network device based on multicast communication to improve uplink data transmission efficiency.