Forwarder Node Bridges Wireless Networks via Frequency Switching
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Solution Overview
Problem
Existing network architectures, particularly in ad-hoc networks, lack an efficient mechanism for data packet transmission between Quality of Service (QoS) stations compliant with IEEE 802.11e standards, as they cannot directly communicate across different networks without a central hub, limiting their functionality and capacity.
Innovation Solution
A forwarder device operates on dual frequencies, functioning as a slave in one network and a master in another, enabling communication between two networks by switching between operation frequencies, thus acting as an interface node to facilitate data packet forwarding between QoS Basic Service Sets (QBSS) without the need for a central hub, enhancing network capacity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central hub (AP) is used to control communication in infrastructure networks, then communication management and QoS control are improved, but network flexibility and ad-hoc deployment capability deteriorate
Solution Approach 1:
The network architecture dynamically switches between infrastructure mode (with AP/HC) and ad-hoc mode (IBSS) based on deployment needs. The AP/HC can transition to ad-hoc operation when infrastructure is unavailable, providing both centralized control when needed and flexible ad-hoc deployment when required.
Solution Approach 2:
The AP/HC device performs multiple functions: it acts as a central coordinator in infrastructure mode providing QoS management, and simultaneously supports ad-hoc mode operation where it can function as a regular station or initiate IBSS networks, making the system universally applicable to both infrastructure and ad-hoc scenarios.
2Adaptability or versatility
If ad-hoc networks allow direct peer-to-peer communication without central hubs, then network flexibility and spontaneous deployment are improved, but communication reliability and QoS control deteriorate
Solution Approach 1:
The forwarder device acts as an intermediary between infrastructure and ad-hoc networks. It receives packets from ad-hoc stations, forwards them through the infrastructure network via the AP/HC, and delivers them to destination stations in other ad-hoc networks, enabling reliable communication between ad-hoc networks while maintaining their flexibility.
Solution Approach 2:
The network is segmented into infrastructure portion (AP/HC with wired connection) and ad-hoc portions (IBSS networks). This segmentation allows each segment to operate optimally: the infrastructure segment provides reliable QoS-controlled communication, while ad-hoc segments provide flexible spontaneous deployment, with the forwarder bridging the segments.
3Object-affected harmful factors
If different networks operate on different frequencies, then interference between networks is reduced, but device complexity and frequency switching requirements increase
Solution Approach 1:
The forwarder device merges multiple network interfaces and frequency capabilities into a single device. It simultaneously operates on different frequencies to communicate with infrastructure and ad-hoc networks, consolidating frequency switching complexity into one dedicated device rather than requiring all devices to handle multiple frequencies.
Solution Approach 2:
The forwarder serves as an intermediary that handles frequency conversion and switching between infrastructure and ad-hoc networks. Other stations can remain simple single-frequency devices, while the forwarder manages the complexity of operating on multiple frequencies and coordinating communication across frequency boundaries.
4Adaptability or versatility
If a forwarder device connects infrastructure and ad-hoc networks, then network connectivity and functionality are improved, but device complexity and operational requirements increase
Solution Approach 1:
The forwarder device is designed with universal functionality to operate in both infrastructure mode (as a station associated with AP/HC) and ad-hoc mode (as a station in IBSS networks). This multi-functionality enables it to bridge the two network types while managing the operational complexity through standardized protocols.
Solution Approach 2:
The forwarder device autonomously manages frequency switching, packet routing, and protocol adaptation between infrastructure and ad-hoc networks. It self-configures its operation mode based on network conditions, reducing the need for manual configuration and simplifying deployment despite its multifunctional capabilities.
Data Source
AI summary
A network array (200) comprises a first network (201) having a plurality of first nodes (203, 204, 209), comprises a second network (202) having a plurality of second nodes (206, 209) and comprises a forwarder node (209). The forwarder node (209) constitutes one of the first nodes (203, 204, 209) and constitutes one of the second nodes (206, 209) to form a communication interface between the first network (201) and the second network (202) in such a manner that the forwarder node (209) functions as a slave in the first network (201) and as a master in the second network (202). The forwarder node (209) is adapted to communicate with the first network (201) using a first operation frequency and is adapted to communicate with the second network (202) using a second operation frequency which is different from the first operation frequency.