Base Station Retry Control for Multi-Link Band Congestion
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Solution Overview
Problem
Multi-link devices using both low and high frequency bands compete with non-multi-link devices on existing frequency bands, leading to reduced communication speeds for non-multi-link devices when existing frequency bands are congested.
Innovation Solution
A wireless communication system that includes a multi-device-compatible base station controlling first and second wireless terminals, where the first terminal can switch to using a higher frequency band when retry attempts exceed a preset threshold in the lower band, preventing further attempts in the lower band until a predetermined time passes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-link device uses both low frequency band and high frequency band simultaneously, then wireless capacity is increased, but communication speed of existing stations using only low frequency band is reduced
Solution Approach 1:
The base station acts as an intermediary that monitors retry counts and mediates frequency band allocation. When it detects that a multi-link device is excessively retrying in the first frequency band (indicating congestion), the base station temporarily suspends the multi-link device's access to the first frequency band, forcing it to use only the second frequency band. This mediation resolves the conflict between multi-link device performance and existing station performance.
Solution Approach 2:
The system dynamically adjusts the communication scheme of the multi-link device based on real-time conditions. The base station monitors the retry count and dynamically switches the multi-link device between two operational states: (1) using both first and second frequency bands when conditions are good, and (2) using only the second frequency band when the first frequency band is congested. This dynamic adaptation resolves the contradiction by adjusting resource allocation according to actual network conditions.
2Adaptability or versatility
If a multi-link device competes for resources on existing frequency band, then it can maintain communication capability, but wireless resources on existing frequency band are insufficient for non-multi-link devices
Solution Approach 1:
The base station segments the multi-link device's access rights to the first frequency band based on network conditions. Instead of allowing unlimited access, the base station divides access into two scenarios: (1) normal access when retry count is below threshold, and (2) restricted access (second frequency band only) when retry count exceeds threshold. This segmentation ensures that wireless resources are allocated appropriately between multi-link devices and existing stations.
3Reliability
If retry attempts in first frequency band are allowed without limitation, then communication reliability is maintained, but communication speed of non-compatible terminals is reduced
Solution Approach 1:
The base station implements a feedback mechanism by monitoring the retry count of multi-link devices in the first frequency band. When the retry count exceeds a predetermined threshold, the base station provides feedback by suspending the multi-link device's access to the first frequency band. This feedback loop prevents excessive retries that would otherwise consume resources and reduce communication speed for existing stations, while still maintaining communication reliability through alternative frequency band usage.
Data Source
AI summary
A wireless communication system according to an embodiment includes: a number-of-times measurement circuitry configured to measure the number of retries in which a first wireless terminal tries to perform communication in conformity with a first communication scheme; and a control circuitry configured to perform control such that the first wireless terminal performs wireless communication with a base station using a second communication scheme without using the first communication scheme until a predetermined time passes when the number of retries measured by the number-of-times measurement circuitry exceeds a preset number of retries less than a predetermined number of retries in which the second wireless terminal tries to perform communication in conformity with the first communication scheme.