Data Transmission Method for Non-Continuous Sub-Channel Indication
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Solution Overview
Problem
Current data transmission methods in wireless communication systems are limited in indicating all combinations of sub-channels, particularly due to the restriction of using 3 bits to indicate bandwidth, which prevents efficient utilization of spectrum resources, especially in contention-based access networks like WiFi systems.
Innovation Solution
A data transmission method that involves transmitting a channel request frame to multiple sub-channels, parsing the channel response frame to determine idle sub-channels, and transmitting data on those sub-channels, allowing for the indication of non-continuous sub-channel combinations and improved spectrum resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If 3 bits are used to indicate bandwidth in RTS/CTS frames, then the frame format is simple and compatible with existing WiFi systems, but the number of indicated sub-channel combinations is extremely limited and cannot indicate all combinations
Solution Approach 1:
The bandwidth indication is segmented into two parts: a primary channel indication (using existing 3-bit format) and a secondary channel indication (using additional fields). This segmentation allows the system to maintain compatibility with existing WiFi systems while extending the indication capability to cover all sub-channel combinations.
Solution Approach 2:
The invention adds a new dimension to the bandwidth indication by introducing secondary channel information fields beyond the traditional 3-bit primary channel indication. This dimensional expansion enables the system to indicate non-continuous sub-channel combinations that were previously impossible with the limited 3-bit format.
2Ease of operation
If continuous bandwidth combinations are indicated only, then the indication method is simple, but non-continuous sub-channel combinations cannot be indicated leading to spectrum resource wastage
Solution Approach 1:
The invention makes the channel indication dynamic by allowing the system to adaptively indicate both continuous and non-continuous sub-channel combinations based on channel conditions. The receiving end can dynamically select which sub-channels to respond on, enabling flexible indication of non-continuous combinations while maintaining operational simplicity through standardized frame formats.
3Reliability
If the receiving end replies with CTS on limited sub-channels due to 3-bit bandwidth indication, then the channel access mechanism is reliable, but the transmitting end cannot learn about idle status of all sub-channels leading to reduced spectrum efficiency
Solution Approach 1:
The invention enhances the feedback mechanism by enabling the receiving end to provide comprehensive channel status information through CTS responses on multiple sub-channels. The transmitting end can now receive feedback about the idle status of all monitored sub-channels, not just the primary channel, allowing for more informed transmission decisions and improved spectrum efficiency while maintaining the reliability of the RTS/CTS handshake.
Data Source
AI summary
A data transmission method and a data transmission device are disclosed. The method comprises: sending, by a transmitting end, a channel request frame to a first receiving end on at least two sub-channels; parsing, by a receiving end after receiving a channel response frame from the first receiving end, the channel response frame to obtain second channel indication information; determining that the sub-channel on which the channel response frame is transmitted is idle; and sending data to the first receiving end on the sub-channel that is determined to be idle.