Wireless Terminal Dual-Mode Network Interconnection
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Solution Overview
Problem
Current wireless communication systems face challenges in interconnecting ad-hoc networks and infrastructure networks, leading to increased transmission delays, error rates, and limited coverage due to multi-hopping, frequency interference, and complex implementation, especially in ad-hoc networks using the ISM band.
Innovation Solution
A wireless communication system and method that dynamically interconnects ad-hoc and infrastructure networks using a wireless terminal with dual frequency interfaces, allowing selection of operation modes for network access based on current circumstances, including infrastructure, ad-hoc, relay, and dual modes, ensuring authentication and efficient use of licensed frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-hopping routing is used in ad-hoc network, then wireless terminals can communicate without fixed infrastructure, but transmission delay and error probability increase rapidly
Solution Approach 1:
The patent introduces a gateway as an intermediary device that connects the ad-hoc network to the infrastructure network. This gateway enables wireless terminals to access the infrastructure network through a single hop rather than multiple hops, significantly reducing transmission delay and error probability while maintaining the ad-hoc network's accessibility benefits
2Adaptability or versatility
If dual frequency interfaces are implemented for ISM and licensed bands, then network interconnection capability is improved, but device complexity increases
Solution Approach 1:
The patent implements a dual-mode operation system where a single wireless terminal can function in both ad-hoc mode (using ISM band) and infrastructure mode (using licensed band). The terminal includes a mode selection unit that dynamically switches between operating modes, allowing one device to perform multiple network access functions without requiring permanently activated dual frequency interfaces, thus reducing overall device complexity
3Adaptability or versatility
If ad-hoc network uses ISM band, then deployment flexibility is improved, but frequency interference occurs with other systems
Solution Approach 1:
The patent segments the network communication into two separate frequency domains: ISM band for ad-hoc network communication and licensed band for infrastructure network communication. The gateway acts as a frequency domain separator, receiving signals from ad-hoc terminals on ISM band and forwarding them to the infrastructure network on licensed band, thereby preventing frequency interference between different network types while maintaining deployment flexibility
Data Source
AI summary
A wireless communication system for interconnecting an ad-hoc network and an IS network, and a wireless terminal and communication method therefor are disclosed. The communication method includes transmitting a discovery signal including terminal information of the wireless terminal to a radio network, receiving a response signal including information for network access from a base station or another wireless terminal, which has received the discovery signal, selecting an operation mode for access to a network through the base station or the other wireless terminal, based on the response signal, communicating with the base station and accessing the IS network when the selected operation mode corresponds to a first mode and accessing a network, to which the other wireless terminal belongs, through a licensed frequency band of the IS network when the selected operation mode corresponds to a second mode. Accordingly, it is possible to support communication through an existing infrastructure and support communication of an ad-hoc network scheme, through use of a licensed frequency band assigned to the provider of an existing IS network.