Data Rate Control for Wireless Network Congestion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications networks using random access to channel, the 'hidden node' problem leads to interference and restricted communication rates due to unpredictable interference, making it difficult to guarantee service delay and fairness among devices.
Innovation Solution
Implementing a data rate controlling parameter that can be adjusted based on service requirements and network conditions to manage channel access, ensuring fair resource allocation and reducing congestion by configuring and adjusting the data rate parameter in source and transfer devices, and utilizing a topologic server to determine reservation values for resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If random access mode is used for channel access, then simplicity and ease of control are improved, but communication capacity and fairness among devices deteriorate due to unpredictable interference and hidden node problems
Solution Approach 1:
The patent applies preliminary action by having devices perform channel monitoring and contention resolution procedures before actual data transmission. Devices monitor the channel for a specified period, detect ongoing transmissions, and adjust their access timing accordingly, preventing interference before it occurs and improving overall communication capacity while maintaining random access simplicity
Solution Approach 2:
The patent implements feedback mechanisms where devices monitor channel conditions, detect interference from hidden nodes, and adjust their transmission timing and power levels based on observed channel state. This feedback loop enables devices to adapt to dynamic network conditions, resolving conflicts and improving fairness without abandoning random access operation
2Adaptability or versatility
If devices transmit data at predetermined rates without control, then device autonomy is improved, but network congestion and interference worsen
Solution Approach 1:
The patent applies dynamics by enabling devices to dynamically adjust their data transmission rates based on real-time channel conditions and network congestion levels. Instead of fixed predetermined rates, devices monitor channel occupancy and interference, then adaptively modify transmission parameters to reduce harmful effects while maintaining autonomous operation
Solution Approach 2:
The patent implements parameter changes by allowing devices to modify transmission power, data rate, and timing parameters based on observed network conditions. When congestion or interference is detected, devices adjust these parameters to reduce conflict, balancing device autonomy with network-wide interference reduction
3Reliability
If channel monitoring is performed before each transmission, then collision avoidance is improved, but transmission delay and loss of time worsen
Solution Approach 1:
The patent applies partial action by implementing selective channel monitoring rather than requiring full monitoring before every transmission. Devices monitor the channel for a reduced duration or only under specific conditions (e.g., when congestion is detected), achieving sufficient collision avoidance while minimizing the time loss associated with extensive monitoring procedures
Data Source
AI summary
A method for adjusting data rate in a network is disclosed. In the method, when a device is added to the network, a data rate controlling parameter is configured, and when there is a new service or the requirements of a service have been changed, the data rate will be adjusted by modifying the data rate controlling parameter of a source device and/or a transfer device. Therefore, the fairness among these devices would be guaranteed, and the congestion over the network would be mitigated. The present invention also discloses a wireless communication system, a data rate adjusting device, and a topologic server.