Subband Data Mapping for Wireless Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently processing and transmitting data over large bandwidths, as existing resource mapping methods require high-bandwidth processing capabilities and increase implementation complexity or latency when using licensed or grant-free spectrum resources.
Innovation Solution
A new data sending and receiving method that divides encoded data into subdata and maps each subdata onto separate subbands for transmission, using a time-frequency resource that occupies multiple subbands, allowing for efficient processing and reduced latency by prioritizing high-priority data on specific subbands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing first-frequency-domain-then-time-domain mapping method is used, then data transmission can be performed, but the communications device needs to have large-bandwidth processing capability and implementation complexity is increased
Solution Approach 1:
The patent divides the large bandwidth carrier into multiple subbands and segments the encoded data into corresponding subdata portions. Each subdata is mapped to a specific subband independently, allowing the communications device to process smaller bandwidth segments rather than requiring full large-bandwidth processing capability. This segmentation reduces both implementation complexity and device complexity.
2Loss of time
If existing first-time-domain-then-frequency-domain mapping method is used, then data transmission can be performed, but the communications device needs to wait until entire transmission period ends and processing latency is increased
Solution Approach 1:
The patent performs frequency-domain mapping of each subdata to its corresponding subband before the entire transmission period begins. This preliminary action allows early processing and preparation of data segments, eliminating the need to wait for the complete transmission period to end before starting demodulation. Consequently, processing latency is reduced while maintaining data transmission efficiency.
3Productivity
If data is transmitted on multiple subbands, then resource utilization is improved, but resource contention and interference among different systems increase
Solution Approach 1:
The patent assigns different subdata portions to different subbands with distinct local characteristics. Each subband can be independently managed and allocated to different systems or services based on local quality requirements. This localized resource allocation improves overall resource utilization while reducing contention and interference by allowing different systems to operate on different subbands with appropriate isolation.
Data Source
AI summary
A data sending and receiving method and apparatus are disclosed. The method includes: obtaining, by a first device, first data, where the first data includes data obtained after a first transport block is encoded, the first data includes at least two pieces of subdata, and the at least two pieces of subdata include first subdata and second subdata; determining, by the first device, a first time-frequency resource used to transmit the first data, where the first time-frequency resource occupies at least two subbands, and the at least two subbands include a first subband and a second subband; and sending, by the first device, the first subdata by using the first subband occupied by the first time-frequency resource, and sending, by the first device, the second subdata by using the second subband occupied by the first time-frequency resource.