Base Station Timing Adjustment for Wireless Propagation Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Propagation delay between a base station and communication devices causes misalignment of temporal segments in messages, leading to interference and communication disruptions, especially at larger distances where traditional timing adjustments are limited by hardware and message format constraints.
Innovation Solution
A base station apparatus with propagation delay determination and time adjustment circuitry that adjusts uplink messages based on the propagation delay, allowing alignment with reference boundaries by selecting a time adjustment that depends on defined ranges of propagation delay, enabling alignment even at large distances without exceeding hardware or message format limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional timing adjustments are used to align uplink messages with reference boundaries, then message alignment is improved for short distances, but the adjustment becomes insufficient and cannot maintain alignment at larger distances due to hardware and message format constraints
Solution Approach 1:
The patent implements dynamic range selection where the system automatically determines which range of temporal segments to use based on the measured propagation delay. This allows the timing adjustment mechanism to adapt its behavior dynamically according to the communication distance, selecting appropriate reference boundaries from multiple predefined ranges rather than using a fixed adjustment method
Solution Approach 2:
The patent changes the parameter of reference boundary selection based on propagation delay characteristics. By determining which range (first range, second range, or third range) the propagation delay falls into, the system selects different reference boundaries for timing adjustment, effectively changing the adjustment parameter to match the communication scenario
2Length of moving object
If the time adjustment is increased to compensate for larger propagation delays, then alignment at larger distances is improved, but the adjustment exceeds hardware or message format limits
Solution Approach 1:
The patent segments the temporal segments into multiple ranges (first range, second range, third range) based on propagation delay characteristics. This segmentation allows the system to handle different distance scenarios separately, selecting appropriate reference boundaries for each range rather than attempting a single unified adjustment for all distances
Solution Approach 2:
The patent introduces a dimensional approach by organizing reference boundaries across multiple ranges rather than using a single linear adjustment scale. This multi-dimensional organization of timing references allows the system to accommodate large propagation delays without requiring excessively large adjustment values, as each range has its own appropriate reference boundaries
3Ease of manufacture
If a single reference boundary is used for all propagation delays, then the system is simple to implement, but alignment fails for devices at different distances
Solution Approach 1:
The patent makes the reference boundary selection dynamic by determining which range the propagation delay falls into and selecting the appropriate reference boundary accordingly. This dynamic adaptation maintains alignment reliability across different distances while keeping the underlying mechanism relatively simple through automated range determination
Data Source
AI summary
A base station apparatus comprises antenna circuitry to transmit messages to and receive messages from a target communication apparatus. The base station apparatus comprises circuitry to determine an indication of a propagation delay in messages sent between the base station apparatus and the target communication apparatus, and circuitry to determine a time adjustment to be communicated to the target communication apparatus based on the indication of the propagation delay. The time adjustment is calculated such that when an uplink message to which the time adjustment has been applied is received at the base station apparatus, a given boundary between temporal segments in the received uplink message aligns with a reference boundary selected in dependence on which of a plurality of defined ranges the indication of the propagation delay falls within.