Collision-Free Roaming Wireless Network with Time-Frequency Access
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Solution Overview
Problem
Existing multiple access wireless network systems face significant challenges in reducing or eliminating packet collisions, especially in environments with a large number of end devices and limited bandwidth, leading to dropped transmitted data.
Innovation Solution
A collision-free roaming wireless network system with packet and timing division controlling multiple access is introduced, which includes a main server, base stations, and end devices. This system manages wireless connectivity and data transmission across static and moving devices, ensuring collision-free data transmission by using an affiliation table, available channel for joining signaling, and signal strength indicators to optimize network connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If random-access mechanism is used for multiple devices to broadcast and receive data signals, then network connectivity and ease of operation are improved, but packet collisions increase significantly
Solution Approach 1:
The patent segments the wireless medium into distinct time slots and frequency channels, creating structured access periods (beacon period, access period, data period) and assigned frequency channels for different devices. This segmentation eliminates random collisions by assigning specific time-frequency resources to each device, resolving the contradiction between ease of operation and reliability.
Solution Approach 2:
The patent implements periodic communication cycles with predetermined structures (beacon period followed by access period, then data period repeating). Devices follow this periodic pattern, with the receiver transmitting beacons at regular intervals and devices accessing the network at designated times. This periodic structure replaces random access, maintaining connectivity while eliminating packet collisions.
2Adaptability or versatility
If more end devices are allowed to join the network, then network versatility and adaptability are improved, but packet collisions increase due to limited bandwidth
Solution Approach 1:
The patent adds frequency as an additional dimension for resource allocation, creating multiple frequency channels that can be used simultaneously. Combined with time slot segmentation, this two-dimensional resource allocation (time × frequency) allows many more devices to communicate without collisions, significantly increasing network capacity while maintaining transmission reliability.
Solution Approach 2:
The patent implements preliminary registration and assignment of frequency channels and time slots to devices before actual data transmission. The receiver assigns specific resources to devices in advance during the beacon period, so when devices transmit data, they do so at predetermined times on predetermined frequencies. This preliminary allocation prevents collisions even as network capacity increases.
3Ease of operation
If conventional roaming methods are used for moving transceivers, then ease of operation is improved, but disconnected periods and packet losses occur
Solution Approach 1:
The patent implements continuous feedback mechanisms where receivers transmit beacon signals containing acknowledgment information, and devices provide feedback during designated access periods. Moving devices maintain connection by receiving beacons and responding during access periods, allowing the network to track and maintain connectivity as devices move between coverage areas, eliminating disconnection periods.
Solution Approach 2:
The patent ensures continuous communication by maintaining overlapping coverage areas and allowing devices to remain connected during transitions. The structured periodic beacon and access periods continue without interruption, and devices can seamlessly switch between receivers while maintaining their assigned time slots and frequency channels, ensuring continuous data transmission without disconnection.
Data Source
AI summary
A collision-free roaming wireless network includes a main server, at least one base station, at least one end device; the main server and the at least one base station are in an external communication network; the main server obtains basic information of the at least one base station; each of the at least one end device transmits individual information attributes to any one of the at least one base station; and each of the at least one base station transmits the information attributes received from end devices to the main server, and based on received basic information of the at least one base station and received information attributes of the at least one end device, the main server generates an affiliation table, which records affiliation of each of the at least one end device with one of the at least one base station, and then the network is established accordingly.