Wireless Multicast Group Management via Join Request Coordination
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Solution Overview
Problem
Managing multicast groups in wireless networks without infrastructure is challenging due to difficulties in maintaining the group when wireless devices join or withdraw, leading to issues with data transmission and group integrity.
Innovation Solution
Implementing a wireless device configuration with reception, determination, and transmission units to handle join requests, manage hop distances, and send redundant prevention messages to maintain group integrity, as well as using multicast group notification frames to restore damaged groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multicast data is sent via multiple wireless devices in infrastructure-less networks, then communication services can be provided without base stations, but multicast group management becomes difficult and groups are not maintained when devices withdraw
Solution Approach 1:
The system performs preliminary actions by having wireless devices proactively send join requests to join multicast groups before data transmission begins. The determining unit checks group membership in advance, and the transmitting unit prepares to send data only after confirming proper group composition, preventing management issues before they occur.
Solution Approach 2:
The system implements feedback mechanisms where wireless devices monitor multicast group membership status and send notifications when joining or withdrawing. The determining unit continuously checks group composition based on received feedback, enabling dynamic maintenance of multicast groups even as devices join and withdraw.
2Productivity
If join requests are forwarded to multiple devices in a multicast group, then all members can receive data, but redundant transmissions occur consuming additional network resources
Solution Approach 1:
The patent introduces an intermediary mechanism where a designated wireless device acts as a coordinator for join requests. When a device sends a join request, the intermediary unit determines whether to forward it based on current group status, preventing redundant transmissions while ensuring all members receive data through efficient routing.
Solution Approach 2:
The system applies partial action by selectively forwarding join requests only when necessary. The transmitting unit evaluates whether forwarding is needed based on group composition and data transmission requirements, avoiding excessive transmissions that would waste network resources while still ensuring complete data delivery to all group members.
Data Source
AI summary
A wireless device and method for managing a multicast group within a wireless network are disclosed. The wireless device is included in a first multicast group in which data is directly sent between member devices or data is sent using hopping between the member devices. The wireless device includes a reception unit, a determination unit, and a transmission unit. The reception unit receives a join request for joining a second multicast group from a joining device that attempts to join the second multicast group. The determination unit extracts information about the second multicast group from the join request, and determines whether the second multicast group is identical with the first multicast group based on the information about the second multicast group. The transmission unit forwards the join request to another device or sends a response to the join request to the joining device based on a result of the determination.