Uplink Transmission Receive Time Window Allocation
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Solution Overview
Problem
Conventional timing advance procedures in wireless communication systems, particularly in millimeter wave (mmW) networks, require significant resource overhead and are not suitable for high-mobility environments, as they involve exchanging multiple timing signals and commands, leading to inefficiencies and delays.
Innovation Solution
The proposed solution omits the timing advance procedure by using a receive time window allocated based on the maximum propagation round-trip time (RTT) and frame size of uplink messages, allowing base stations to expect uplink messages during a predetermined time window without the need for explicit timing synchronization, enabling efficient communication without the resource-intensive timing advance process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing advance procedure is used for uplink timing control, then timing synchronization is achieved, but resource overhead and processing complexity increase significantly
Solution Approach 1:
The patent extracts and removes the timing advance procedure from the uplink communication process. Instead of performing the complete timing advance procedure with multiple signal exchanges, the system only uses the essential timing information from downlink signals to establish a receive time window, eliminating the need for separate timing advance signaling and reducing resource overhead while maintaining adequate timing synchronization.
Solution Approach 2:
The patent performs timing window allocation in advance based on downlink propagation delay estimates before uplink transmission occurs. The base station calculates the receive time window using downlink signal timing and propagation characteristics, preparing the timing structure beforehand so that uplink transmissions can occur without real-time timing advance adjustments, reducing processing complexity and resource overhead.
2Measurement precision
If timing advance procedure is performed, then uplink timing accuracy is improved, but communication delays increase due to multiple signal exchanges
Solution Approach 1:
The system performs timing window allocation in advance using downlink propagation delay estimates before uplink transmission is needed. By calculating the receive time window based on downlink signal timing characteristics beforehand, the system eliminates the need for real-time timing advance signaling exchanges, reducing communication delays while maintaining adequate timing accuracy for uplink reception.
3Measurement precision
If conventional timing advance procedure is used, then timing control is achieved, but adaptability to high-mobility environments is reduced
Solution Approach 1:
The patent implements a dynamic receive time window allocation mechanism that adapts to changing propagation conditions in high-mobility environments. Instead of relying on rigid timing advance procedures that require frequent updates, the system dynamically adjusts the receive time window based on current downlink signal timing and estimated propagation delays, allowing flexible adaptation to mobility-induced timing variations without complex signaling overhead.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A base station may transmit a downlink message to a user equipment (UE). The base station may allocate a receive time window associated with receiving an uplink message from the UE responsive to the downlink message, wherein the receive time window is allocated based at least in part on a maximum propagation round trip time (RTT) associated with UEs within a coverage area of the base station and a frame size of the uplink message. The base station may monitor the receive time window for the uplink message from the UE. The base station may receive the uplink message from the UE during the receive time window.