UE Uplink Resource Muting Rules for SBFD CLI Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sub-band full duplex (SBFD) communication is susceptible to interference such as inter-subband cross-link interference (CLI), intra-cell or inter-cell CLI, and inter-UE CLI, which can cause loss of synchronization between user equipment (UE) and network nodes due to unpredictable uplink resource muting.
Innovation Solution
Implementing rules for frequency domain resource allocation (FDRA), time domain resource allocation (TDRA), and slot type rules to determine when to mute uplink transmissions, along with signaling mechanisms like DCI, CSI, and RRC signaling to activate or deactivate uplink resource muting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If uplink resource muting is implemented to avoid CLI in SBFD communication, then interference is reduced, but synchronization between UE and network nodes may be lost due to unpredictable muting
Solution Approach 1:
The patent applies preliminary action by configuring UE with muting patterns and rules in advance through RRC signaling. The UE is pre-configured with information about which resources should be muted based on network conditions, allowing deterministic muting behavior that maintains synchronization while reducing CLI. The network node also performs preliminary scheduling decisions to accommodate potential muting events.
Solution Approach 2:
The patent implements feedback mechanisms where the network node monitors uplink transmissions and provides feedback through downlink control information. This feedback loop allows the network to adjust muting configurations dynamically while maintaining synchronization. The UE reports its muting status and the network adapts its scheduling accordingly to preserve timing relationships.
2Reliability
If deterministic muting rules are applied to ensure synchronization, then reliability is improved, but flexibility in adapting to different communication scenarios is reduced
Solution Approach 1:
The patent applies dynamics by implementing multiple muting patterns that can be dynamically selected based on communication conditions. Instead of a fixed muting strategy, the system can switch between different patterns (e.g., pattern A, B, or C) depending on network load, interference conditions, and scheduling decisions. This allows the system to maintain synchronization through deterministic rule-based muting while adapting to various scenarios through dynamic pattern selection.
Solution Approach 2:
The patent utilizes parameter changes by allowing the muting configuration to vary based on different scheduling conditions. The network can change muting parameters such as which resource blocks are muted, the timing of muting events, and the duration of muting patterns. This enables the system to maintain reliable synchronization through consistent rule application while adapting to different communication scenarios by adjusting muting parameters.
3Productivity
If uplink resource muting is used to reduce interference, then system capacity is improved, but device complexity increases due to multiple muting patterns and rules
Solution Approach 1:
The patent applies segmentation by dividing the uplink resource space into distinct muting patterns and regions. Instead of handling all possible muting scenarios as a single complex problem, the system segments the solution into discrete, manageable patterns (e.g., pattern A for certain resource blocks, pattern B for others). Each pattern is simpler to implement, and the UE can be configured with a finite set of these segmented patterns rather than dealing with unlimited complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to rules, such as implicit rules, for a UE to use in determining whether to apply uplink resource muting to a particular uplink communication in a particular uplink resource. In some aspects, the rules may include frequency domain resource allocation (FDRA) rules, time domain resource allocation (TDRA) rules, or slot type rules, among other examples, as described in more details herein. For example, a UE may determine where a resource is allocated, in an uplink subband, for physical uplink shared channel (PUSCH) transmission, and may determine whether to mute the PUSCH transmission based on where the resource is allocated.