PUSCH Resource Element Muting for Cross-Link Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cross-link interference occurs when the uplink of one cell interferes with the downlink of another cell, leading to data loss and poor quality of service.
Innovation Solution
User equipment dynamically configures resource elements to mute certain resource blocks, reducing interference by preventing them from transmitting in a direction that would otherwise interfere with opposite-direction transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink transmission is performed in all resource blocks, then transmission efficiency is improved, but cross-link interference to downlink increases
Solution Approach 1:
The resource blocks are segmented into multiple groups, and specific resource element patterns within these groups are selected for muting based on interference conditions. This allows partial transmission rather than complete muting, balancing efficiency and interference reduction
Solution Approach 2:
Different resource element patterns are applied to different resource block groups based on their specific interference characteristics. The muting pattern is locally optimized for each group rather than uniformly applied, allowing transmission efficiency to be maintained in low-interference regions while reducing interference in high-interference regions
2Object-generated harmful factors
If resource elements are muted to reduce interference, then cross-link interference is reduced, but transmission capacity decreases
Solution Approach 1:
The resource element pattern for muting is dynamically selected based on the antenna ports information element value in DCI. Different patterns can be activated depending on the transmission conditions, allowing the system to adapt between interference reduction and capacity maintenance
Solution Approach 2:
The antenna ports information element serves as a control parameter that determines which resource element pattern to apply. By changing this parameter, the system can switch between different muting patterns or no muting, thereby adjusting the balance between interference reduction and transmission capacity
3Reliability
If dynamic resource element muting is implemented, then service quality is improved, but device complexity increases
Solution Approach 1:
Multiple resource element patterns are pre-configured and stored in the UE. When transmission occurs, the UE only needs to select from these pre-defined patterns based on the DCI information, rather than generating patterns in real-time, which reduces processing complexity
Data Source
AI summary
Systems, methods, and apparatuses for muting resource elements used for wireless communications is disclosed. In one aspect, a method can include actions of obtaining, by user equipment (UE), configuration data that indicates a frequency density of muted resource blocks, identifying, by the UE and based on a value of an antenna ports information element in downlink control information (DCI) that schedules a PUSCH transmission, a group of resource elements within the muted resource blocks, determining, by the UE, a muted resource pattern (MRP) within the RBs for the scheduled PUSCH based on the frequency density of the muted resource blocks and the identified group of resource elements, and transmitting, by the UE, an allocation of RBs for PUSCH without transmission on the identified group of resource elements of the determined MRP.