Sounding Reference Signal Resource Block Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in enhancing the flexibility and efficiency of sounding reference signal (SRS) transmission, particularly in determining the location of a reference slot and managing resource blocks for SRS, which affects channel state information acquisition and overall network performance.
Innovation Solution
The proposed methods involve indicating partial frequency factor values and offset values using RRC or MAC CE signals, and utilizing most significant bits in the MCS field of DCI to determine a reduced number of resource blocks for SRS transmission, allowing for flexible SRS resource allocation and improved coverage and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of resource blocks for SRS transmission is reduced using partial frequency factor values, then SRS flexibility and capacity are enhanced, but the complexity of determining reference slot location and managing resource blocks increases
Solution Approach 1:
The frequency bandwidth is segmented into multiple resource blocks, and the partial frequency factor values are used to indicate different numbers of resource blocks for SRS transmission. This segmentation allows flexible allocation of resource blocks while maintaining manageable complexity through standardized indication methods.
Solution Approach 2:
The system dynamically adjusts the number of resource blocks for SRS transmission by selecting from multiple partial frequency factor values based on current network conditions and requirements. This dynamic adjustment enhances flexibility while the pre-defined factor values keep the management complexity controlled.
2Adaptability or versatility
If multiple sets of values for partial frequency factor and offset are indicated, then SRS resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
Multiple sets of values for partial frequency factor and offset are merged into a single indication mechanism using most significant bits in the MCS field of DCI. This combining approach provides comprehensive resource allocation flexibility while minimizing signaling overhead by utilizing existing DCI structure.
Solution Approach 2:
The most significant bits in the MCS field are used for dual purposes: indicating partial frequency factor values and offset values. This multi-functionality reduces signaling overhead by reusing existing fields rather than introducing separate indication channels.
3Adaptability or versatility
If RRC or MAC CE signals are used to indicate partial frequency factor values, then configuration flexibility is enhanced, but processing time and complexity increase
Solution Approach 1:
Partial frequency factor values are pre-configured using RRC or MAC CE signals, allowing the network to prepare configuration options in advance. This preliminary action enables flexible configuration while reducing real-time processing time during actual SRS transmission.
Solution Approach 2:
The configuration of partial frequency factor values is extracted into a separate pre-configuration phase using RRC or MAC CE signaling, distinct from the real-time SRS transmission control. This separation allows flexible configuration setup without adding processing delays to the time-critical transmission path.
Data Source
AI summary
Techniques are described to perform transmission of a reference signal such as a sounding reference signal (SRS). An example wireless communication method includes performing, by a network device, a first transmission that indicates a plurality of partial frequency factor values to a communication device, wherein each partial frequency factor value indicates a number used to determine a reduced number of resource blocks by the communication device to transmit a reference signal; and performing a second transmission, after the first transmission and to the communication device, of one or more bits that indicate a partial frequency factor value from the plurality of partial frequency factor values.