Wireless Control Information Multiplexing via Frequency Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, the increasing volume and complexity of information lead to a significant overhead in bandwidth required for physical layer control signals, making it necessary to minimize the number of bits required for control information, especially when transmitting to multiple terminals simultaneously.
Innovation Solution
The method involves generating and transmitting distinct transmission control information for each device over non-overlapping frequency ranges, using orthogonal frequency division multiple access (OFDMA) and high-efficiency signaling to efficiently multiplex control information and data across multiple frequency bands, allowing devices to decode their specific information based on identifiers and error detection values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the volume and complexity of information communicated wirelessly increases, then the information transmission capability is improved, but the overhead bandwidth required for physical layer control signals increases linearly
Solution Approach 1:
The patent segments control information for different devices into distinct non-overlapping frequency ranges within the OFDMA framework. Each device receives control information in a specific frequency subset, allowing parallel transmission of multiple control messages without interference. This segmentation enables the system to handle increased information volume for multiple devices while keeping individual control overhead bandwidth efficient.
2Productivity
If control information is transmitted to multiple terminals simultaneously, then the communication efficiency is improved, but the number of bits required for control information increases
Solution Approach 1:
The patent transitions from time-division or code-division multiplexing to frequency-domain multiplexing by allocating control information to different frequency ranges. This dimensional change allows multiple devices to receive control information simultaneously in the frequency domain without increasing the total bit overhead, as each device processes only its allocated frequency subset.
3Reliability
If distinct control information is transmitted to each device, then the reliability of device-specific control is improved, but the device complexity for processing increases
Solution Approach 1:
The patent applies local quality by tailoring control information to specific devices in specific frequency ranges. Each device receives control parameters optimized for its local channel conditions, data rate requirements, and buffer status. This localized approach improves reliability by providing device-appropriate control while reducing processing complexity compared to universal control schemes.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods and systems for wireless communication are disclosed. In one aspect, a method includes generating device specific transmission control information for each of two devices, transmitting the transmission control information for each device over different frequencies, and transmitting data to each of the devices as part of a communication according to the respective transmission control information. In some aspects, the transmission control information for each device is encoded based on an identifier of the device. For example, in some aspects, an exclusive or operation may be performed using an error detection value such as a cyclic redundancy check and an identifier of the device, such as an AID, PAID, or group identifier. The resulting value is transmitted along with the transmission control information. A device receiving the wireless frame may only be able to decode its own transmission control information, as the decoding is also based on the receiving device's identifier.