Emergency Data Transmission Scheduling in 802.11ah Sensor Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current data transmission methods in emergency scenarios, such as 802.11ah, often result in prolonged waiting times for sensor stations to access a radio access point, failing to meet the urgent data transmission requirements in emergency situations.
Innovation Solution
Sensor stations transmit characterizing information to a radio access point indicating the maximum allowed transmission delay for emergency data, allowing the access point to schedule and allocate transmission time within that delay, ensuring data is transmitted promptly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If current data transmission methods in 802.11ah are used, then the system supports up to 6000 sensor stations with standard access procedures, but sensor stations experience prolonged waiting times that fail to meet emergency data transmission requirements
Solution Approach 1:
The patent applies preliminary action by having the sensor station indicate its emergency data status and maximum allowed transmission delay in advance, before actual data transmission. The access point uses this pre-provided information to prioritize scheduling, allocating transmission opportunities within the specified delay constraint rather than using standard queueing procedures.
Solution Approach 2:
The patent applies local quality by treating emergency data differently from regular data. The system identifies specific data packets as emergency data through indication information and applies a specialized scheduling mechanism with relaxed delay constraints only to these packets, while maintaining standard procedures for non-emergency data.
2Reliability
If standard access procedures are used for all sensor stations, then the system maintains uniform access rules, but emergency data cannot be transmitted timely due to long waiting periods
Solution Approach 1:
The patent applies dynamics by making the transmission delay constraint adaptive rather than fixed. The system dynamically adjusts the allowed transmission delay based on the emergency status indication from the sensor station, enabling shorter delays for emergency data while maintaining standard delay tolerances for regular data transmissions.
Solution Approach 2:
The patent applies parameter changes by modifying the transmission delay parameter based on data type. The access point receives indication information that changes the delay parameter from the standard value to a relaxed maximum allowed delay value for emergency data, enabling flexible adaptation to different transmission requirements.
3Productivity
If the access point uses conventional scheduling methods, then resource allocation follows standard protocols, but sensor stations cannot guarantee transmission within maximum allowed delay for emergency data
Solution Approach 1:
The patent applies feedback by using the indication information from the sensor station about emergency status and maximum allowed delay to adjust scheduling decisions. The access point receives this feedback and modifies its resource allocation accordingly, prioritizing emergency data transmissions within the specified delay constraints.
Solution Approach 2:
The patent applies preliminary action by having the sensor station provide emergency status indication and maximum delay constraints before data transmission begins. This advance information allows the access point to pre-plan resource allocation and prioritize emergency data in the scheduling queue, reducing waiting time while maintaining manageable complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Embodiments of the present invention provide a method for transmitting data, a method for receiving data and a device. The transmitting method includes: transmitting, by an STA, characterizing information to an AP, wherein the characterizing information is used to characterize a maximum transmission delay allowed by uplink data to be transmitted by the STA (101); receiving, by the STA, transmission time that is specified for the STA and returned by the AP within the maximum transmission delay allowed by the uplink data to be transmitted by the STA, wherein the transmission time is within a range of the maximum transmission delay allowed by the uplink data to be transmitted by the STA (102); and transmitting, by the STA, the uplink data to the AP within the transmission time (103). Technical solutions of the present invention solve a problem of data transmission in an emergency application scenario, and guarantee requirements placed by emergency data upon transmission delay.