Beam Management in High-Pathloss Wireless Mode
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Solution Overview
Problem
In wireless communications systems, especially those operating in high-pathloss modes, beam management efficiency is impaired due to the suspension of beam management related signaling during extended transmission durations.
Innovation Solution
The implementation of regular and scheduled interruptions of the physical shared channel's transmission time interval (TTI) to allow for the transmission of beam management signals, such as CSI-RS, SRS, TRS, and beam reports, thereby maintaining beam management efficiency even in adverse network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmission time interval (TTI) is extended to improve throughput in high-pathloss mode, then the data transmission capacity is improved, but beam management efficiency deteriorates due to suspension of beam management signaling
Solution Approach 1:
The patent implements periodic interruptions of the extended TTI to transmit beam management signals at regular intervals. These periodic interruptions allow CSI-RS, SRS, TRS, and beam reports to be transmitted while maintaining the overall extended TTI structure for high throughput, thus periodically refreshing beam management information without completely breaking the data transmission flow
Solution Approach 2:
The extended TTI is segmented into multiple portions, with certain time resources allocated for data transmission and other time resources reserved for beam management signaling. This segmentation allows simultaneous achievement of extended transmission duration for throughput and dedicated resources for beam management, resolving the contradiction between the two requirements
2Duration of action of moving object
If beam management signaling is suspended during extended TTI to maintain continuous data transmission, then transmission continuity is improved, but beam accuracy deteriorates
Solution Approach 1:
The patent maintains continuity of useful action by ensuring that both data transmission and beam management signaling occur without complete interruption. The extended TTI continues to transmit data while periodic interruptions insert beam management signals, ensuring both transmission continuity and beam accuracy are maintained through overlapping rather than mutually exclusive operations
3Reliability
If periodic beam management signals are transmitted during extended TTI, then beam management efficiency is improved, but transmission time is reduced due to interruptions
Solution Approach 1:
The patent applies partial action by transmitting beam management signals only at specific periodic intervals rather than continuously throughout the extended TTI. This partial insertion of beam management signaling provides sufficient beam management efficiency while minimizing the time lost to interruptions, as opposed to excessive action which would involve continuous or frequent beam management transmissions
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. When operating in a high-pathloss mode, wireless devices in a network may transmit or receive downlink control information (DCI) that schedules a transmission time interval (TTI) for a physical shared channel (such as a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH)). A wireless device may determine one or more intervals that correspond to a periodic signal that collides with portions of the TTI. Based on the identified intervals, the wireless device may communicate over the physical shared channel during the TTI. In such cases, the TTI may overlap in time with the one or more intervals to allow communication of the periodic signal during the portions of the TTI. For instance, a periodic signal may be transmitted or received during each of the one or more intervals.