Bundled Subframe Transmission with Consistent Precoding
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Solution Overview
Problem
The increasing demand for data transmission in wireless communication systems, particularly with the rise of machine-to-machine (M2M) communication and high-density node environments, poses challenges in efficiently managing limited radio resources for uplink and downlink data and control information transmission.
Innovation Solution
A method and apparatus for transmitting and receiving data using the same precoding matrix, reference signal sequence, and scrambling sequence across bundled subframes, allowing for efficient data transmission and reception by assuming consistency in these parameters across multiple subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data is transmitted using different precoding matrices, reference signal sequences, and scrambling sequences in each subframe, then the adaptability to changing channel conditions is improved, but the system complexity and resource overhead increase
Solution Approach 1:
The patent bundles multiple subframes together and applies the same precoding matrix, reference signal sequence, and scrambling sequence across all subframes within the bundle. This merging approach reduces the number of independent parameter sets needed, thereby lowering system complexity while maintaining effective data transmission across the bundled subframes
Solution Approach 2:
The precoding matrix, reference signal sequence, and scrambling sequence are determined in advance for the entire bundled subframe set rather than being dynamically changed in each subframe. This preliminary determination simplifies the transmission process by eliminating the need for frequent parameter updates and signaling overhead
2Device complexity
If the same precoding matrix and reference signal sequence are used across bundled subframes, then the system complexity is reduced, but the adaptability to time-varying channel conditions deteriorates
Solution Approach 1:
The patent introduces dynamic subframe selection within the bundled subframes based on channel conditions. While the precoding parameters remain consistent across the bundle, the system dynamically selects which subframes to actually transmit data in, adapting to time-varying channel conditions without changing the precoding matrices or reference signal sequences
3Productivity
If more radio resources are allocated for data transmission in high-density node environments, then the data throughput is improved, but the resource utilization efficiency deteriorates due to limited available resources
Solution Approach 1:
The patent bundles multiple subframes together for data transmission, enabling continuous data transmission across the bundled subframes when channel conditions are favorable. This approach increases data throughput by utilizing multiple subframes consecutively while avoiding the overhead of repeated control signaling for each individual subframe, thereby improving resource utilization efficiency
Data Source
AI summary
A method for transmitting data by a transmitting device, includes applying, by the transmitting device, a redundancy version (RV) to a data channel; applying, by the transmitting device, a scrambling sequence to the data channel; and transmitting, by the transmitting device, the data channel, wherein the data channel is transmitted repeatedly in N consecutive subframes, where N is a positive integer greater than 1, wherein the RV for the data channel is changed once every R consecutive subframes in the N consecutive subframes, where R is a predefined positive integer greater than 1 and less than N, and wherein the scrambling sequence for the data channel is applied per subframe to the data channel and stays the same for a block of R consecutive subframes over which the RV for the data channel stays the same.