Multicast Rate Determination via Dynamic Group Segmentation
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Solution Overview
Problem
Current wireless networks treat multicast and broadcast transmissions similarly, leading to spectral inefficiency and unreliability, especially in multi-user environments, where devices with higher transmission rates are compromised to accommodate lower rates, and lack of feedback and power-saving mechanisms result in battery drain and inefficient spectrum usage.
Innovation Solution
Implementing a system that allows for dynamic multicast group formation with adjustable transmission rates and feedback mechanisms, such as MCAST_JOIN_REQUEST and MCAST_STATUS_REPORT messages, to enable devices to join groups with optimal rates and power-saving settings, and forming secondary multicast groups to optimize power usage and spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low transmission rates are selected to accommodate all wireless devices in multicast transmissions, then reliability is improved, but spectrum efficiency deteriorates
Solution Approach 1:
The patent segments multicast receiving devices into different groups based on their transmission rate capabilities. Devices are divided into a first group supporting higher rates and a second group supporting lower rates, allowing the system to transmit at different rates to different groups simultaneously, thus improving both reliability and spectrum efficiency
Solution Approach 2:
The patent implements dynamic rate adjustment where the access point can switch between different transmission rates based on the current multicast group composition and device capabilities. The system dynamically forms different multicast groups and adjusts transmission rates according to real-time network conditions and device support
2Ease of operation
If multicast transmissions are treated similarly to broadcast transmissions, then ease of operation is improved, but reliability deteriorates due to lack of feedback mechanisms
Solution Approach 1:
The patent introduces feedback mechanisms where receiving devices send status reports to the access point regarding their reception quality and group membership. This feedback enables the access point to adjust transmission parameters, form appropriate groups, and maintain reliable multicast transmissions while keeping the system relatively simple to operate
3Use of energy by moving object
If power-save mechanisms are implemented for multicast transmissions, then energy consumption is reduced, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent implements preliminary action by having devices indicate their power-save capabilities and DTIM preferences in advance during the group formation process. The access point uses this pre-provided information to configure appropriate multicast groups and transmission schedules, eliminating the need for complex real-time coordination while still achieving power savings
Data Source
AI summary
According to one embodiment of the invention, systems and methods are provided for power management for wireless multicast communication. For example, a method for an access point includes receiving a request message from a wireless device, the request message identifying a multicast group of the access point and a desired power-save characteristic of the wireless device; and transmitting an accept message to the wireless device, the accept message accepting the desired power-save characteristic.