MAC Manager Logic for Multi-Radio WLAN IP Address Sharing
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Solution Overview
Problem
The integration of multiple WLAN radios in mobile devices leads to contention at the MAC and PHY layers, as independent radios compete for the same medium, necessitating a solution to coordinate their operations effectively while maintaining efficient communication.
Innovation Solution
The implementation of a MAC manager logic that enables two or more WLAN subsystems with distinct MAC addresses to share a single Internet Protocol address, determining if they are within the same Extended Service Set (ESS) and coordinating their operations to optimize data transmission and reduce contention through address resolution requests and radio selection procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple WLAN radios are added to improve wireless connectivity and performance, then WLAN communication capability is improved, but contention at MAC and PHY layers increases
Solution Approach 1:
The patent segments the network layer functionality by introducing separate network interfaces for each WLAN radio, while keeping the data link layer (MAC) operations independent. This allows each radio to have its own network interface with distinct IP addressing, eliminating contention at the network layer while maintaining independent MAC operations for parallel data paths
Solution Approach 2:
The patent introduces a MAC manager as an intermediary component that coordinates between multiple WLAN subsystems and the network interface. The MAC manager receives data from multiple WLAN radios, determines the appropriate radio for transmission based on current conditions, and manages the network interface accordingly, thereby reducing contention through intelligent mediation
2Productivity
If independent radios are used to create parallel data paths, then data transmission efficiency is improved, but coordination complexity increases
Solution Approach 1:
The patent segments the system into independent WLAN subsystems, each with its own MAC layer and network interface, allowing parallel data path operations. Each subsystem can independently manage its data transmissions while the MAC manager provides high-level coordination, maintaining efficiency while managing complexity through modular segmentation
Solution Approach 2:
The patent adds a new dimension of network layer abstraction above the MAC layer, introducing virtual network interfaces that map to physical WLAN radios. This dimensional addition allows independent radios to operate in parallel at the MAC layer while being coordinated at the network layer, resolving the coordination complexity issue
3Reliability
If separate IP addresses are assigned to each radio system, then network communication independence is improved, but address management complexity increases
Solution Approach 1:
The patent segments the addressing scheme by assigning separate IP addresses to each network interface corresponding to a WLAN radio. This segmentation maintains network communication independence for each radio while the MAC manager handles the complexity of managing multiple addresses through a unified interface, separating the benefits of independent addressing from the complexity of address management
Data Source
AI summary
An apparatus includes a first media access control (MAC) device with a first radio transceiver and having a first MAC address, and a second MAC device with a second radio transceiver and having a second MAC address. The first MAC device is operative to communicate with a first wireless access point using an Internet Protocol (IP) address. The second MAC device is operatively coupled to the first MAC device, and is operative to communicate with a second wireless access point using the same IP address.