SRS Resource Allocation in Multi-TRP Wireless Networks
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Solution Overview
Problem
Current 5G wireless networks face challenges in efficiently managing SRS cyclic shift (CS) resource allocation, particularly in multi-transmission/reception point (TRP) scenarios, leading to inter-TRP cross-SRS interference and suboptimal resource utilization.
Innovation Solution
The method involves configuring CS allocation per port using a subset of allowable CS values, allowing for flexible allocation of CS and comb shift resources through radio resource control (RRC) messages, and employing orthogonal time frequency space (OTFS) transmitters and receivers to optimize SRS resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SRS resource allocation is managed in multi-TRP scenarios using conventional methods, then resource allocation can be performed, but inter-TRP cross-SRS interference occurs and resource utilization becomes suboptimal
Solution Approach 1:
The patent segments the set of allowable cyclic shift (CS) values into multiple subsets, where each subset is assigned to a specific transmission/reception point (TRP). This segmentation prevents inter-TRP interference by ensuring that SRS resources from different TRPs use disjoint CS values, thereby resolving the technical contradiction between maintaining resource allocation capability and eliminating cross-TRP interference.
2Productivity
If CS allocation is configured per port using subsets of allowable CS values, then resource efficiency is enhanced and interference is reduced, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by configuring CS allocation specifically per port using subsets of allowable CS values, rather than applying a uniform allocation scheme across all ports. This localized configuration optimizes resource efficiency for each port individually while maintaining manageable complexity through structured subset assignments.
3Adaptability or versatility
If flexible allocation of CS and comb shift resources is implemented through RRC messages, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring CS and comb shift resource allocations through RRC messages before actual SRS transmission occurs. This advance configuration enables flexible and adaptive resource allocation while reducing real-time signaling overhead, as the resource assignment is established in advance rather than dynamically negotiated during transmission.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method is provided for handling SRS resource allocation in multi-TRP in wireless networks by a BS or a TRP unit. The method includes configuring CS allocation to at least one port of a UE. The CS allocation uses values from a sub-set of a plurality of allowable CS values. Further, the method includes receiving a SRS using the allocated CS. In an embodiment, per—port CS allocation provides flexibility of using the CS resources efficiently to minimize inter-TRP interference. The method can be used to allocate CS and SRS resources efficiently.