Multicast Transmission Segmentation for Wireless Sensor Resource Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 802.11ah scenarios, sensor stations (STAs) waste resources as they receive all multicast information after a beacon frame, even though they only need specific information, leading to inefficient power consumption and resource utilization.
Innovation Solution
The proposed method uses a DTIM beacon frame to indicate multicast groups, allowing the access point (AP) to send multicast information at specific intervals based on the value order of multicast IDs, ensuring STAs receive only the relevant information at corresponding receiving intervals, thereby reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If STAs receive all multicast information after a beacon frame, then they can obtain complete information, but resource waste increases and power consumption rises
Solution Approach 1:
The patent segments multicast information transmission by introducing group IDs and dividing multicast groups into multiple subgroups. Each STA only needs to receive information related to its specific subgroup, rather than all multicast information. This segmentation approach maintains information completeness for relevant data while eliminating the waste of receiving unrelated multicast information, thus resolving the contradiction between information completeness and power consumption.
2Loss of information
If STAs receive all multicast information, then they ensure no information is missed, but resource utilization efficiency decreases
Solution Approach 1:
By segmenting multicast information into group-specific and subgroup-specific transmissions, the patent enables STAs to efficiently receive only necessary information. This segmentation improves resource utilization efficiency by eliminating redundant reception of unrelated multicast data while ensuring STAs obtain all relevant information through the structured transmission approach.
3Use of energy by stationary object
If FMS mode is used to reduce beacon frame listening times, then power consumption decreases, but STAs still receive all multicast information and resource waste occurs
Solution Approach 1:
The patent enhances the FMS mode by introducing group ID-based segmentation. STAs in FMS mode can continue to reduce beacon frame listening times to save power, while the segmented multicast information transmission ensures they only receive relevant subgroup information. This combination resolves the contradiction by maintaining the power-saving benefit of FMS while eliminating the resource waste of receiving all multicast information.
Solution Approach 2:
The patent applies local quality by making multicast information transmission targeted and specific to each STA's subgroup. Instead of uniform transmission to all STAs, the system provides localized information delivery based on group and subgroup memberships. This allows STAs to operate in FMS mode with reduced listening times while receiving only the specific multicast information relevant to their local context, eliminating resource waste.
4Adaptability or versatility
If multicast information is sent to all STAs, then all STAs can receive the information, but unnecessary resource consumption increases for STAs not needing the information
Solution Approach 1:
The patent segments multicast information delivery by group ID and subgroup ID, enabling targeted transmission to specific STA subsets. This segmentation maintains adaptability by ensuring all STAs that need information can receive it through their designated groups, while eliminating unnecessary resource consumption by STAs not belonging to those groups. The segmented approach allows flexible, scalable information delivery coverage without universal broadcasting waste.
Data Source
Figure 1~2
Figure 2b~2c
Figure 3~4
AI summary
Embodiments of the present invention provide a multicast information transmission method and a device. Sending, by an access point AP, a multicast association identifier MID of a multicast group to a station STA, where one multicast group has one or more MIDs, and each MID corresponds to one multicast group and a receiving period of a STA in the multicast group; sending, by the AP, a delivery traffic indication map DTIM beacon frame to the STA, where the DTIM beacon frame includes the MID and is used for indicating a multicast group that has multicast information to be sent to the STA; and sending, by the AP, the multicast information of the multicast group, where the multicast information carries information about the MID or information associated with the MID, and the multicast information is received by the STA. The technical solutions of the present invention reduce resource waste of a STA.