Network Coded Sidelink Relay for Missed Message Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in reliably transmitting sidelink messages, as messages may fail to be received or decoded by intended recipients, leading to increased resource usage and latency due to retransmissions.
Innovation Solution
Implementing network coding techniques at a relay device to combine missed sidelink messages and transmit a network coded combined message with control information, indicating the original messages and their sequence numbers, to support decoding by the receiving device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sidelink messages are retransmitted individually to ensure reliability, then message delivery reliability improves, but resource usage increases
Solution Approach 1:
The patent combines multiple individual message retransmissions into a single network-coded combined message. The relay device applies network coding to merge multiple missed sidelink messages into one composite message that can be decoded by the receiving device, thereby reducing the number of retransmission resources required while maintaining delivery reliability.
Solution Approach 2:
The patent changes the parameter of message structure by encoding multiple messages into a single network-coded combined message with associated control information. This parameter change allows the system to transmit the same amount of information more efficiently, reducing resource consumption while ensuring reliable delivery.
2Reliability
If multiple individual messages are retransmitted to ensure all messages are received, then message delivery completeness improves, but transmission latency increases
Solution Approach 1:
The patent merges multiple retransmission operations into a single network-coded combined message transmission. By combining multiple messages that would otherwise be sent separately into one composite message, the system reduces the total transmission time and latency while ensuring all original messages are delivered complete to the receiving device.
3Quantity of substance
If network coding is implemented to combine multiple messages into one, then resource usage decreases, but device complexity increases
Solution Approach 1:
The patent introduces a relay device as an intermediary that performs the network coding function. This intermediary device combines multiple messages into a single network-coded combined message and transmits it to the receiving device. The complexity of network coding is centralized in the relay device, which manages the encoding and decoding processes, thereby reducing overall system complexity while achieving resource efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described to support transmitting a network coded combined message to a second wireless device that may have missed at least one sidelink message included in another network coded combined message. A first wireless device may identify that the sidelink messages are configured for network coding based on information associated with the sidelink messages. Control information associated with the network coded combined message may indicate that the network coded message is a network coded combined retransmission of the sidelink messages, and may further include information identifying the sidelink messages and devices that transmitted the sidelink messages. The first wireless device may combine the sidelink messages into the network coded combined message and may transmit the control information and the associated network coded combined sidelink message to the second wireless device, which may support decoding of one or more missed sidelink messages.