Joint Coding Uplink Data Transmission Reducing Delay
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Solution Overview
Problem
Current hybrid automatic repeat request (HARQ) technologies in communications systems result in significant transmission delays due to feedback and retransmission processes, which are not suitable for future communications systems requiring low signaling overheads and short transmission delays, especially in grant-free uplink data transmission scenarios.
Innovation Solution
Implementing an uplink data transmission method where a first terminal device obtains and performs joint coding on second uplink data from another terminal device, adding a cyclic redundancy check (CRC) code scrambled with the second terminal device's identifier, and transmitting the coded data using different transmission resources, thereby reducing delay while achieving transmit diversity gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ technology is used for data transmission, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by having the first terminal device perform joint coding on its own uplink data and the second terminal device's uplink data before transmission. This preprocessing enables the network device to decode both users' data from a single transmission, eliminating the need for separate feedback and retransmission cycles for each user, thus reducing transmission delay while maintaining reliability
Solution Approach 2:
The patent merges the transmission of multiple users by having the first terminal device perform joint coding on uplink data from both the first and second terminal devices. The coded data is then transmitted together on the same uplink resource, combining multiple transmission tasks into one operation, which reduces overall transmission delay while maintaining reliability through the joint coding structure
2Loss of substance
If grant-free transmission is implemented, then signaling overhead is reduced, but transmission delay requirement cannot be met
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink resources for grant-free transmission and having terminal devices perform joint coding before transmission. This eliminates the need for dynamic scheduling grants, reducing signaling overhead, while the joint coding ensures that transmission delay requirements are met by processing data before the grant-free transmission occurs
3Loss of time
If joint coding is performed on multiple users' data, then transmission delay is reduced, but system complexity increases
Solution Approach 1:
The patent applies self-service by having the first terminal device autonomously perform joint coding on its own data and the second terminal device's data without requiring complex network-side coordination. The terminal device independently completes the joint coding process, reducing the need for complex network infrastructure while achieving reduced transmission delay
Data Source
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AI summary
The present invention discloses an uplink data transmission method and apparatus. The method includes: obtaining, by a first terminal device, second uplink data of a second terminal device; performing, by the first terminal device, joint coding processing on first uplink data of the first terminal device and the second uplink data to obtain jointly coded data; and transmitting, by the first terminal device, the first uplink data to a network device using a first transmission resource, and transmitting the jointly coded data to the network device using a second transmission resource different from the first transmission resource. According to the uplink data transmission method and apparatus disclosed in the present invention, a transmission delay can be reduced while transmit diversity gains are obtained.