mmWave Wireless Unit Beacon Scanning for Faster Link Setup
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Solution Overview
Problem
Existing mm wave wireless communication systems face challenges in efficiently managing air interface resources, particularly in supporting high-capacity communication for mobile units, with issues such as interference, limited communication channels, slow link establishment, and complex resource allocation, which affect reliability and performance.
Innovation Solution
The system employs a wireless communication unit that utilizes communication sub-channels within a communication channel, using specific frequency offsets to scan for beacons from access points, allowing for faster link setup and improved detection of suitable access points through a nested loop scanning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of communication channels is increased to reduce interference and improve communication performance, then communication capacity and reliability are improved, but device complexity and operational complexity increase
Solution Approach 1:
The patent segments the communication channel into multiple sub-channels with different frequency offsets. Instead of treating the entire channel as a single unit, it divides the channel into smaller sub-channels that can be independently scanned and selected. This segmentation allows the system to manage multiple channels more efficiently by processing them in smaller, manageable units, thereby reducing operational complexity while maintaining the benefits of multiple channel options for improved communication performance.
2Adaptability or versatility
If communication resources are allocated dynamically to adapt to mobility scenarios, then adaptability is improved, but device complexity and processing delay increase
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple communication sub-channels with different frequency offsets before actual communication begins. The system pre-establishes the structure of available sub-channels and their characteristics, so that when mobility scenarios require resource reallocation, the system can quickly switch between pre-configured sub-channels rather than performing complex real-time allocation decisions. This preliminary preparation reduces processing complexity during dynamic adaptation while maintaining high adaptability to mobility scenarios.
3Measurement precision
If beacon scanning is performed across all communication channels to ensure accurate detection, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent applies local quality by focusing the beacon scanning process on specific sub-channels with particular frequency offsets that are most likely to contain the beacon signal. Instead of uniformly scanning all channels with equal intensity, the system prioritizes scanning sub-channels based on their local characteristics and probability of containing the beacon. This selective scanning approach maintains measurement precision for beacon detection while significantly reducing the overall time required compared to exhaustive scanning of all channels.
4Productivity
If frequency offsets are used to create orthogonal sub-channels to reduce interference, then communication capacity is improved, but loss of time for resource allocation increases
Solution Approach 1:
The patent utilizes parameter changes by systematically varying frequency offset parameters to create orthogonal sub-channels. Instead of requiring complex multi-parameter resource allocation procedures, the system achieves channel orthogonalization through relatively simple frequency offset adjustments. This parameter-based approach allows for quick resource allocation decisions while still achieving the interference reduction benefits of orthogonal channels, thereby improving communication capacity without significant time penalty for resource allocation.
Data Source
AI summary
A wireless communication system comprises wireless access points arranged to communicate with wireless communication units using mm wave radio communication links formed in communication sub-channels that are given by a bandwidth, a channel frequency, a large frequency offset, and a small frequency offset. The access points transmit beacons and the communication units seek to discover access points by scanning. A scanner of the communication unit scans communication sub-channels for a beacon transmitted by a wireless access point and terminates the scan if a beacon is detected. The scan order is arranged to keep the small frequency offset fixed while varying the large frequency offset. A controller controls a communication circuit to set up a mm wave radio communication link to the access point of a detected beacon. This may allow faster scanning with typically an improved and faster detection of a beacon from a suitable access point.