PUCCH Resource Switching for Radar-Resilient UCI Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G cellular networks face challenges in reliably receiving and transmitting Uplink Control Information (UCI) transmissions in the presence of high-power narrowband interferers such as radar, leading to interference with critical uplink control information (UCI) and potential interference with radar systems.
Innovation Solution
Implementing dynamic reconfiguration of PUCCH resources, diversifying PUCCH frequency locations, dynamic switching of CSI reporting between PUCCH and PUSCH, and power boosting of PUCCH transmissions to mitigate interference from radars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH resources are used in overlapping frequency bands with radar, then 5G network communication can proceed, but reliable reception of uplink control information is compromised due to radar interference
Solution Approach 1:
The patent implements dynamic reconfiguration of PUCCH resources where the network can suspend resources in certain frequency bands and unsuspend them in others based on detected radar interference conditions. This dynamic adjustment allows the system to adapt to changing interference environments, maintaining reliable UCI reception by avoiding contaminated frequency bands while utilizing clean bands when available.
Solution Approach 2:
The patent changes the frequency location parameter of PUCCH resources dynamically. By receiving signaling from the network to suspend first PUCCH resources and unsuspend second PUCCH resources with different frequency locations, the system alters the operational parameters of uplink control channels to avoid radar interference bands, thereby improving reception reliability.
2Object-affected harmful factors
If PUCCH resources are suspended and diversified in frequency locations, then interference from radars is mitigated, but system complexity increases due to dynamic resource management
Solution Approach 1:
The patent segments the PUCCH resources into multiple sets with different frequency locations (first PUCCH resources and second PUCCH resources). This segmentation allows the system to selectively suspend or unsuspend specific resource sets based on interference conditions, managing complexity by organizing resources into discrete, controllable groups rather than handling all resources uniformly.
Solution Approach 2:
The patent introduces signaling from the network as an intermediary mechanism that coordinates the suspension and unsuspension of PUCCH resources. This intermediary control layer manages the complexity of dynamic resource reconfiguration by providing centralized coordination, allowing WTRUs to follow network directives without independently making complex decisions about resource allocation.
3Reliability
If power boosting is applied to PUCCH transmissions, then UCI transmission reliability is improved in the presence of radar interference, but energy consumption increases
Solution Approach 1:
The patent applies power boosting selectively rather than uniformly across all PUCCH transmissions. By identifying specific WTRUs that will incur interference from radars and applying power boosting only to their PUCCH transmissions, the system improves reliability where needed while minimizing unnecessary energy consumption in interference-free scenarios.
Data Source
AI summary
A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference with uplink control channels may include receiving configuration information including a set of dedicated physical uplink control channel (PUCCH) resources for scheduling requests (SRs), the set includes first PUCCH resources of an UL BWP, and second PUCCH resources of the UL BWP different from the first PUCCH resources. SRs are sent using the first PUCCH resources while the second PUCCH resources are suspended from use. The WTRU receives signaling from a network to suspend one or more of the first PUCCH resources, and unsuspend one or more of the second PUCCH resources. Thereafter, subsequent SRs are sent using only unsuspended PUCCH resources of the UL BWP and not the suspended PUCCH resources, in response to the received signaling from the network. Additional embodiment are disclosed.