SRS Resource Cyclic Shift Allocation for Uplink Control
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving sounding reference signal (SRS) resources, particularly in next-generation 5G systems that require enhanced mobile broadband, massive machine-type communications, and ultra-reliable low-latency communications, where existing methods do not effectively utilize all cyclic shifts (CSs) of SRS resources for optimal uplink control information transmission.
Innovation Solution
A method where user equipment (UE) and base station (BS) utilize all unused CSs of SRS resources by receiving and transmitting information about their usage, including an SRS resource index, a CS index not used for SRS, and a usage indication index, to determine the usage of SRS resources, allowing for flexible and efficient transmission and reception of uplink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all cyclic shifts of SRS resource are used for SRS transmission, then SRS transmission capability is improved, but flexibility in transmitting uplink control information is reduced
Solution Approach 1:
The patent segments the cyclic shifts into two distinct groups: some cyclic shifts are allocated for SRS transmission while other cyclic shifts are reserved for uplink control information transmission. This segmentation allows both functions to operate independently without conflict, resolving the contradiction between maximizing SRS transmission capability and maintaining flexibility for control information transmission.
Solution Approach 2:
The patent creates a multi-functional resource allocation system where the SRS resource can serve dual purposes: when certain cyclic shifts are used for SRS transmission and other cyclic shifts are used for uplink control information. This universal resource structure allows the system to adapt to different transmission needs without requiring separate dedicated resources for each function.
2Reliability
If dedicated resources are allocated for uplink control information, then transmission reliability is improved, but resource utilization efficiency is reduced
Solution Approach 1:
The patent merges the SRS resource with uplink control information transmission capability by allocating different cyclic shifts within the same resource for different purposes. This combining approach ensures that control information has a guaranteed transmission path (improving reliability) while simultaneously utilizing the same physical resource for both SRS and control information (improving resource utilization efficiency).
Data Source
AI summary
A method for transmitting an SRS resource by a terminal when all cyclic shifts (CSs) of a sounding reference signal (SRS) resource are not used for SRS comprises the steps of: receiving information on the usage of a CS that is not used for a SRS; receiving information on an SRS resource index, a CS index that is not used for the SRS, and a usage specifying index; and transmitting the SRS resource by using the CS index, wherein the usage of the SRS resource is determined on the basis of information on the usage of the CS and the usage specifying index.