Parallel Data Stream Blanking for Multi-TRP TDD Synchronization
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Solution Overview
Problem
In wireless communication systems using Time Division Duplex (TDD) with multiple Transmission Reception Points (TRPs), especially in millimeter wave frequency range (FR2), synchronization of uplink and downlink transmissions becomes challenging due to increased latency and inefficient resource utilization as devices handle parallel data streams that are out of order, leading to unnecessary blanking and resource waste.
Innovation Solution
Wireless devices and nodes dynamically determine and signal the required blanking based on the time of arrival of signals from multiple TRPs, allowing for optimized configuration of parallel data streams to avoid unnecessary blanking and synchronization issues, thereby reducing latency and increasing system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TDD systems use multiple TRPs for communication, then system capacity and resource utilization are improved, but synchronization complexity and latency increase
Solution Approach 1:
The patent segments the synchronization problem by introducing separate blanking mechanisms for different TRPs. Each TRP can be independently configured with appropriate blanking periods, allowing the system to handle multiple TRPs without requiring complex global synchronization. This divides the monolithic synchronization challenge into manageable per-TRP segments.
Solution Approach 2:
The patent implements dynamic blanking configuration where the network can adaptively adjust blanking periods for different TRPs based on current system conditions, device capabilities, and traffic patterns. This dynamic approach allows the system to optimize performance in real-time rather than using fixed synchronization parameters, reducing overall complexity while maintaining high capacity.
2Measurement precision
If TDD systems implement strict synchronization for UL and DL transmissions, then timing precision is improved, but latency increases due to necessary blanking periods
Solution Approach 1:
The patent applies local quality by implementing differentiated blanking configurations for different TRPs and different time slots. Instead of uniform strict synchronization across all transmissions, the system applies timing precision only where necessary while allowing more flexible scheduling elsewhere. This localized approach maintains required timing precision for critical operations while reducing overall latency.
Solution Approach 2:
The patent enables dynamic adjustment of blanking period parameters based on device type, service requirements, and channel conditions. By changing these timing parameters adaptively rather than maintaining fixed strict synchronization, the system achieves required timing precision for specific operations while minimizing unnecessary latency in other transmissions.
3Productivity
If the system increases the number of connected wireless devices in TDD, then system capacity is improved, but time synchronization becomes increasingly challenging
Solution Approach 1:
The patent segments the device population into different groups based on their synchronization capabilities and service requirements. Each group can be managed with appropriate blanking configurations, allowing the system to support a large number of devices without requiring all of them to adhere to the same strict synchronization regime. This segmentation maintains synchronization ease while increasing overall capacity.
Solution Approach 2:
The patent creates a universal blanking configuration mechanism that can serve multiple functions: it provides synchronization for TDD operations, enables multi-TRP support, and accommodates different device types simultaneously. This multi-functional approach allows the system to scale to more devices without proportionally increasing synchronization complexity.
4Reliability
If the system applies blanket blanking for all parallel data streams, then communication reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The patent implements local quality by applying blanking selectively to specific TRPs and specific data streams based on their individual reliability requirements. Instead of blanket blanking across all parallel data streams, the system identifies which streams need protection and applies blanking only there. This maintains communication reliability for critical streams while preserving resource utilization in streams that can tolerate tighter timing.
Solution Approach 2:
The patent applies partial action by implementing blanking only to the extent necessary for each specific TRP and data stream. Rather than applying excessive blanket blanking to all streams, the system determines the minimum required blanking for each case. This partial approach maintains sufficient reliability while avoiding the resource waste that would result from excessive uniform blanking.
Data Source
AI summary
A method performed at a wireless device, for communicating with one or more wireless nodes using parallel data streams. The method includes determining, based on a first time of arrival of a first signal from a first wireless node and a second time of arrival of a second signal from a second wireless node, blanking required by the wireless device to ensure communication using the parallel data streams under current conditions. The method includes transmitting, to at least one of the first and second wireless nodes, signaling indicative of the determined required blanking.