Home Gateway Multicast Forwarding for Wireless IPv6
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Solution Overview
Problem
The transmission quality of IPv6 multicast data in wireless networks is poor, affecting user experience in applications like IPTV and network video broadcasting.
Innovation Solution
A method and system that utilize a home gateway (HGW) to listen for Multicast Listener Discovery (MLD) Report messages, associate source MAC addresses with multicast IP addresses, and replace destination MAC addresses in IPv6 multicast data packages to forward them as unicast data to wireless users, improving transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If IPv6 multicast data is transmitted directly over wireless networks, then network resource utilization is improved, but transmission quality deteriorates
Solution Approach 1:
The patent segments the transmission process into two parts: unicast control plane communication for multicast group management and multicast data plane transmission for actual data delivery. This segmentation allows the control overhead to be minimized while maintaining reliable multicast transmission over wireless networks.
Solution Approach 2:
The patent introduces an intermediary mechanism where the mobile terminal first establishes unicast connection with the network to request multicast service, and the network uses this unicast channel to deliver multicast data. The unicast connection acts as an intermediary that ensures reliable delivery while enabling efficient multicast data transmission.
2Adaptability or versatility
If multicast data is transmitted to wireless users, then service coverage is improved, but transmission quality deteriorates
Solution Approach 1:
The patent implements dynamic adaptation where the network dynamically establishes unicast connections with mobile terminals based on their multicast service requirements. The unicast connection parameters and multicast data delivery mechanisms are dynamically adjusted according to wireless channel conditions and user mobility, ensuring both broad service coverage and maintained transmission quality.
Data Source
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AI summary
A method and system for transmitting wireless multicast data are used to improve transmission quality of the existing wireless IPv6 multicast data. After a home gateway (HGW) starts an MLD listening, if the HGW determines that an MLDREPORT message received from a port is transmitted by a wireless user, associates a source MAC address in the MLDREPORT message with the port and a multicast IP address in the MLDREPORT message and records them into an MLD multicast forwarding table; and after receiving an IPv6 multicast data package from a streaming media, the HGW matches a destination IP address of the IPv6 multicast data package with the multicast IP address recorded in the MLD multicast forwarding table, and judges whether the port corresponding to the matched multicast IP address is a wireless port; and if yes, forwards the IPv6 multicast data package to the wireless port after replacing the destination MAC address of the IPv6 multicast data package with an MAC address associated with the wireless port.