Beam Synchronization Access Signal Time Interval Optimization
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Solution Overview
Problem
The existing beam training methods in new-generation mobile communication systems, particularly in the new radio (NR) system, are inefficient due to the long access time and high access delay caused by the need to sweep through multiple beams, which affects the coverage range and handover quality.
Innovation Solution
A signal transmission method that includes sending and receiving signals within access signal time intervals, where the uplink access signal time interval has a greater time or frequency domain distribution density than the downlink access signal time interval, allowing for efficient sweeping and synchronization of beams during initial access and tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam sweep traversal is performed to traverse all beams in the initial access process, then beam coverage and synchronization accuracy are improved, but access time and delay increase significantly
Solution Approach 1:
The patent applies preliminary action by performing a coarse beam search first to identify candidate beams before conducting fine beam training. This preliminary coarse search establishes initial beam pairs for subsequent refined synchronization, avoiding the need to traverse all possible beams from scratch and thereby reducing overall access delay while maintaining synchronization accuracy.
Solution Approach 2:
The beam training process is segmented into two distinct phases: coarse beam search and fine beam training. The coarse phase quickly identifies promising beam directions, while the fine phase performs precise synchronization on selected beam pairs. This segmentation allows the system to balance between comprehensive beam coverage and time efficiency by not uniformly applying fine training to all beams.
2Area of stationary object
If multiple beams are swept through in sequence during initial access, then complete beam coverage is achieved, but the number of time slots required increases
Solution Approach 1:
The patent applies partial action by performing fine beam training only on selected candidate beam pairs identified during coarse search, rather than performing exhaustive fine training on all possible beam combinations. This selective approach maintains adequate beam coverage while significantly reducing the time required for the beam sweep process.
Solution Approach 2:
The coarse beam search serves as a preliminary action that identifies a subset of promising beam directions before the main fine training phase. This preliminary identification allows the system to achieve comprehensive coverage efficiently by focusing detailed training resources only on the most promising beam pairs.
3Reliability
If beam training is performed exhaustively to ensure optimal beam selection, then communication quality is improved, but handover performance deteriorates due to long access time
Solution Approach 1:
The beam training process is segmented into coarse search and fine training phases, allowing the system to quickly identify suitable beam pairs during handover without performing exhaustive training. This segmentation enables faster handover execution while maintaining adequate communication quality through the fine training phase applied selectively to chosen beam pairs.
Solution Approach 2:
During handover scenarios, the system applies partial fine training only to the selected beam pairs identified in the coarse phase, rather than performing exhaustive training on all beams. This approach maintains sufficient communication quality for handover purposes while significantly reducing access time and improving handover speed.
Data Source
AI summary
Disclosed are a signal transmission method and device, and a computer storage, including that: a base station sends or receives a signal within a sweep time interval, an access signal time interval, which is comprised of sweep time blocks sweep time blocks. The access signal time interval includes a downlink access signal time interval and an uplink access signal time interval. The base station sends the signal over the downlink access signal time interval, and receives the signal over the uplink access signal time interval. A terminal sends or receives a signal within the access signal time interval which is comprised of the sweep time blocks. The terminal sends the signal over the uplink access signal time interval, or receives the signal over the downlink access signal time interval.