PUCCH SRS Transmission via SC-FDMA Symbol Puncturing
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Solution Overview
Problem
In wireless communication systems, transmitting a sounding reference signal together with uplink control signals while preserving the single carrier characteristic and improving spectral efficiency is challenging, as it affects battery consumption and scheduling overhead.
Innovation Solution
The method involves generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe with a punctured SC-FDMA symbol, where the uplink control information and sounding reference signal are transmitted simultaneously, using orthogonal sequences of different lengths in each slot to maintain orthogonality and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sounding reference signal is transmitted on the uplink control channel, then spectral efficiency is improved, but the single carrier characteristic cannot be preserved
Solution Approach 1:
The uplink control channel transmission is segmented into multiple SC-FDMA symbols, with specific symbols allocated for uplink control information and others punctured for sounding reference signal transmission. This segmentation allows the system to maintain single carrier characteristics in control channel transmissions while enabling SRS transmission through punctured symbols, thereby resolving the contradiction between spectral efficiency improvement and single carrier characteristic preservation.
2Stability of the object's composition
If the uplink control signal and sounding reference signal are separately transmitted, then the single carrier characteristic is preserved, but spectral efficiency cannot be improved
Solution Approach 1:
The patent merges the transmission of uplink control information and sounding reference signal into the same uplink control channel by allowing SRS to be transmitted on punctured SC-FDMA symbols within the PUCCH structure. This combining approach enables both signals to share the same transmission resource, improving spectral efficiency while maintaining single carrier characteristics through the SC-FDMA modulation scheme.
3Reliability
If separate transmission of uplink control signal and sounding reference signal is used, then transmission reliability is maintained, but scheduling overhead increases
Solution Approach 1:
By combining uplink control information and sounding reference signal transmission into a single PUCCH structure with punctured symbols, the patent reduces the number of separate transmission resources needed. This merging eliminates the need for separate scheduling of control channels and SRS resources, thereby reducing scheduling overhead and time loss while maintaining transmission reliability through the robust SC-FDMA modulation and orthogonal sequence spreading.
Data Source
AI summary
A method of transmitting a sounding reference signal includes generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe, the subframe comprising a plurality of SC-FDMA (single carrier-frequency division multiple access) symbols, wherein the uplink control information is punctured on one SC-FDMA symbol in the subframe, and transmitting simultaneously the uplink control information on the PUCCH and a sounding reference signal on the punctured SC-FDMA symbol. The uplink control information and the sounding reference signal can be simultaneously transmitted without affecting a single carrier characteristic.