Uplink Control and User Data Multiplexing on PUSCH
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE-Advanced, there is a challenge in efficiently transmitting control data and user data on a Physical Uplink Channel (PUC) without causing interference, especially when periodic feedback of control data coincides with user data transmission, and existing methods do not effectively minimize interference and maximize resource usage.
Innovation Solution
The solution involves a method and apparatus for transmitting control data and user data simultaneously on a combined Physical Uplink Channel (PUC) using mixed coding techniques, including DFT-Spread OFDM modulation, time division multiplexing, and channel multiplexing, which exploits existing LTE channel codes to minimize interference and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control data and user data are transmitted separately on different channels, then interference between them is minimized, but resource usage efficiency decreases and system complexity increases
Solution Approach 1:
The patent combines control data and user data into a single Physical Uplink Shared Channel (PUSCH) transmission. The control data is multiplexed with user data in the time-frequency domain, allowing both types of data to share the same physical channel resources. This merging approach improves resource usage efficiency while maintaining error protection through separate coding schemes for control and user data.
2Reliability
If control data is transmitted with higher priority and protection, then reliability of control information is improved, but resource allocation for user data decreases
Solution Approach 1:
The patent segments the transmission resources within the PUSCH by allocating different time-frequency resources to control data and user data. Control data is transmitted in specific resource elements with dedicated reference signals and coding, while user data occupies remaining resources. This segmentation allows priority protection for control data while maintaining adequate resource allocation for user data.
Solution Approach 2:
The patent applies different quality levels to different parts of the transmission by using separate coding schemes, modulation orders, and error protection levels for control data versus user data. Control data receives enhanced error protection through repetition coding and dedicated reference signals, while user data uses standard channel coding, creating local quality differentiation within the unified channel.
3Reliability
If separate channels are used for control and user data, then channel-specific optimization is achieved, but device complexity and power consumption increase
Solution Approach 1:
The patent merges control data and user data transmission into a single PUSCH channel, eliminating the need for separate PUCCH and PUSCH transmissions. This reduces the number of independent channel management functions required in the device, lowering processing complexity and power consumption while maintaining channel-specific optimization through separate coding and resource allocation within the unified channel.
Data Source
AI summary
A method for transmission of control data and user data on a Physical Uplink Channel (PUC) is disclosed. An instruction from a base station to use an uplink control channel and an uplink shared channel to transmit uplink data is received. Control data and user data on the uplink control channel and the uplink shared channel is transmitted.