PUSCH Resource Muting for Crosslink Interference Measurement
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Solution Overview
Problem
In 5G NR networks, crosslink interference (CLI) between uplink (UL) and downlink (DL) resources due to dynamic TDD allocation leads to reduced UL coverage, increased communication delay, and reduced UL capacity, which existing solutions like subband non-overlapping full duplex (SBFD) have insufficient implementation.
Innovation Solution
A method for deactivating radio resources through semi-static or dynamic configuration of uplink muting resources to improve CLI measurement accuracy, involving user equipment and base stations, using signaling to manage muting patterns and resource allocation for physical uplink shared channels (PUSCH) to mitigate CLI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD allocation is used to support flexible time allocation of DL and UL, then adaptability of resource allocation is improved, but crosslink interference occurs between DL and UL leading to reduced UL coverage and capacity
Solution Approach 1:
The patent extracts and removes the interfering uplink transmissions in specific symbols where downlink transmissions occur in neighboring cells. By identifying and taking out these conflicting resource allocations, the system eliminates crosslink interference while preserving the flexibility of dynamic TDD in non-interfering time slots.
Solution Approach 2:
The patent applies preliminary anti-action by proactively configuring uplink muting patterns before interference occurs. The network device pre-identifies potential CLI scenarios and configures corresponding muting patterns in advance, preventing interference before it affects UL coverage and capacity.
2Measurement precision
If uplink muting resources are deactivated to improve CLI measurement accuracy, then measurement precision is improved, but uplink resource utilization is reduced
Solution Approach 1:
The patent applies local quality by making uplink muting selective rather than universal. Instead of muting all uplink resources, the system applies muting only in specific time-frequency resources where CLI measurement is required, while allowing normal uplink transmissions in other resources. This localized approach maintains measurement precision without significantly impacting overall uplink resource utilization.
3Productivity
If subband non-overlapping full duplex (SBFD) is implemented to support full-duplex communication, then UL and DL capacity are improved, but implementation complexity increases
Solution Approach 1:
The patent applies dynamics by enabling flexible, dynamic configuration of uplink muting patterns that can be adapted to different CLI scenarios and network conditions. Rather than implementing complex fixed SBFD structures, the system dynamically adjusts muting configurations based on actual interference measurements and network requirements, reducing implementation complexity while maintaining capacity improvements.
Data Source
AI summary
User equipment according to an embodiment disclosed in the present disclosure includes a communication module configured to transmit signals to and receive signals from a serving base station; and a processor, wherein the processor is configured to receive first information related to semi-static configuration or dynamic configuration of uplink muting resources from the serving base station through first signaling via the communication module, the uplink muting resources being related to crosslink interference (CLI) measurement for reception of a physical uplink shared channel (PUSCH) of the serving base station, receive second information indicating whether to apply muting to the muting resources dynamically from the serving base station through second signaling via the communication module, and transmit the PUSCH to the serving base station through remaining resources other than muting resources in a slot determined based on the first and second information.