SRS Resource Selection Using Reference Time Sets in Flexible Duplex
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining SRS resources for signal transmission, leading to interference and reduced resource utilization, especially in half-duplex modes like TDD and FDD, which impact network energy efficiency and capacity.
Innovation Solution
A method for determining SRS resources based on a reference time-domain resource set, allowing flexible duplex modes and reducing interference by adjusting signal transmissions according to orthogonal or overlapping conditions with the resource set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If half-duplex mode is used in TDD or FDD spectrum, then self-interference is avoided and cross link interference is reduced, but resource utilization decreases and latency increases
Solution Approach 1:
The patent implements dynamic duplex mode selection where the system can switch between half-duplex and flexible duplex modes based on traffic conditions and interference levels. The base station determines whether to configure SRS resources for flexible duplex mode dynamically, allowing the system to adapt its operation mode in real-time to balance interference avoidance and resource utilization.
Solution Approach 2:
The patent changes the operational parameters of the communication system by introducing flexible duplex mode as an alternative to fixed half-duplex mode. By modifying the duplex mode parameter and adjusting SRS resource allocation accordingly, the system can achieve better resource utilization while managing interference through parameter optimization rather than being constrained by fixed mode operation.
2Productivity
If flexible duplex mode is supported on TDD or FDD spectrum, then resource utilization increases and latency decreases, but self-interference and cross link interference increase
Solution Approach 1:
The patent introduces SRS (Sounding Reference Signal) resources as an intermediary mechanism to manage interference in flexible duplex mode. The base station configures specific SRS resources that allow the system to detect and measure interference conditions, enabling intelligent decision-making about when and how to apply flexible duplex mode, thus mediating between resource utilization goals and interference management requirements.
Solution Approach 2:
The patent implements a feedback mechanism where the base station determines flexible duplex mode configuration based on channel conditions and interference measurements. The system continuously monitors the radio environment and adjusts the duplex mode and SRS resource allocation accordingly, using feedback from channel quality indicators and interference levels to optimize the balance between resource utilization and interference control.
3Device complexity
If SRS resources are determined without reference to time-domain resource sets, then signaling overhead is reduced, but transmission reliability decreases due to interference
Solution Approach 1:
The patent applies preliminary action by pre-configuring reference time-domain resource sets and associating SRS resources with these reference sets before actual data transmission. The base station prepares the SRS resource configuration in advance, linking it to specific time-domain resource patterns, so that when flexible duplex mode is activated, the UE can immediately determine the appropriate SRS resources without complex real-time signaling, thus ensuring transmission reliability while minimizing overhead.
4Device complexity
If traditional SRS resource determination method is used, then system complexity is low, but capacity is limited due to rigid resource allocation
Solution Approach 1:
The patent enhances system universality by making the SRS resource determination mechanism applicable to both traditional half-duplex modes and flexible duplex modes. The reference time-domain resource set framework provides a unified approach that works across different duplex modes and traffic conditions, allowing the same basic mechanism to serve multiple functions: traditional resource allocation, flexible duplex optimization, and interference management, thereby increasing network capacity without proportionally increasing system complexity.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used in a node for wireless communication. The method comprises: a first node receiving a first information block, wherein the first information block is used for determining a reference time-domain resource set; and receiving first signaling, and sending a first signal, wherein the first signaling comprises a first domain, the first domain in the first signaling indicates a first SRI, and the first domain comprises at least one bit; the first SRI indicates a first SRS resource, and some or all of the antenna ports for sending the first signal are the same as antenna ports for the first SRS resource; and the first SRI is associated with at least one transmission of the first SRS resource before the first signaling, and the at least one transmission depends on the reference time domain resource set.