Multirole Device Channel Scan Time Slices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multirole devices experience significant connection loss when acting as access points due to time-consuming channel scans, which are necessary for roaming in IEEE 802.11 wireless networks, as they dedicate resources solely to scanning and neglect AP functions during this period.
Innovation Solution
Implementing a baseband controller that time division multiplexes channel scan time slices with STA and AP functions, allowing concurrent operation and minimizing connection loss by protecting AP functions during channel scans through clear to send (CTS) messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the multirole device performs a complete channel scan over all available channels, then the station mode can find available access points for roaming, but the access point mode experiences connection loss and service interruption
Solution Approach 1:
The patent divides the channel scan operation into multiple time slices, allocating specific time portions for STA channel scanning and AP servicing. This segmentation allows the device to perform channel scans in distributed time intervals rather than dedicating a continuous long period, thereby maintaining AP connections while periodically updating channel information.
Solution Approach 2:
The patent implements dynamic time allocation where the baseband controller adjusts the timing and duration of channel scan operations based on current network conditions and connection requirements. This dynamic approach allows flexible balancing between STA roaming needs and AP service continuity, adapting to changing operational demands.
2Loss of information
If the baseband processor dedicates resources solely to channel scanning in station mode, then comprehensive channel information is obtained, but the access point function is neglected causing connection loss
Solution Approach 1:
The patent implements periodic channel scanning where the STA function performs channel scans at regular intervals rather than continuously. This periodic approach ensures that channel information is kept reasonably current while allowing the AP function to operate continuously without interruption, maintaining connection reliability.
Solution Approach 2:
The patent ensures continuous AP servicing by maintaining the AP function active throughout the entire operation, while the STA channel scanning occurs in periodic intervals. This continuity principle ensures that the AP connection is never broken while still obtaining necessary channel information through periodic scans.
3Adaptability or versatility
If the device switches between station mode and access point mode resources, then multirole functionality is achieved, but channel scan time consumption increases connection loss risk
Solution Approach 1:
The patent implements a single baseband processor that universally handles both STA and AP functions through time division multiplexing. This multi-functionality approach allows one processor to serve dual roles by allocating different time slices to each function, eliminating the need for separate dedicated processors and reducing resource switching overhead.
Solution Approach 2:
The patent merges the STA and AP functions into a single integrated baseband processing system that shares common hardware resources. By combining these functions in one processor with time-division multiplexing, the system reduces the complexity and time associated with switching between separate dedicated processors, improving overall efficiency.
Data Source
AI summary
Systems and methods for channel scanning for multirole device are disclosed. One implementation relates to a method for servicing functions by a multirole device. The method comprises dividing a channel scan over a plurality of channels into a plurality of channel scan time periods, and repeatedly time division multiplexing a time period for the servicing of one of a station (STA) function and an access point (AP) function, a time period for the servicing of the other of the STA function and the AP function, and a channel scan time period for each of the plurality of channel scan time periods.