Uplink Power-Based Forwarding Policy for V2V Signaling Overhead
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Solution Overview
Problem
Current forwarding solutions in V2V communication, such as DSRC and cellular technologies, face challenges with high signaling overhead and delay when each mobile terminal acts as a forwarding node, limiting the effective transmission range and efficiency of data forwarding in scenarios like Vehicle-to-Vehicle (V2V) communication.
Innovation Solution
A method to determine the uplink transmit power of mobile terminals and establish a forwarding policy based on this power, selectively triggering forwarding to reduce unnecessary forwarding and improve efficiency, by using the mobile terminal as a forwarding node only when necessary, thereby optimizing the transmission range and reducing signaling overhead and delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If each mobile terminal serves as a forwarding node to expand transmission range, then the transmission range is enlarged, but signaling overhead and delay increase greatly
Solution Approach 1:
The patent applies local quality by differentiating the forwarding behavior of mobile terminals based on their individual uplink transmit power levels. Terminals with higher transmit power are selected as forwarding nodes, while those with lower power are not. This selective approach ensures that only terminals capable of maintaining acceptable signal quality become forwarding nodes, thereby expanding transmission range while controlling signaling overhead caused by unnecessary forwarding attempts from low-power terminals.
Solution Approach 2:
The patent changes the parameter of transmit power as the basis for determining forwarding node selection. By using uplink transmit power as a threshold criterion, the system dynamically identifies suitable forwarding nodes based on their transmission capabilities. This parameter-based selection mechanism optimizes the balance between transmission range expansion and signaling overhead reduction, as forwarding nodes are chosen based on their actual ability to transmit data effectively.
2Area of stationary object
If each mobile terminal serves as a forwarding node to expand transmission range, then the transmission range is enlarged, but forwarding delay increases
Solution Approach 1:
The patent applies local quality by selecting forwarding nodes based on their local transmit power characteristics. Terminals with higher uplink transmit power are designated as forwarding nodes, ensuring that data forwarding is performed by devices capable of rapid and reliable transmission. This reduces forwarding delay because high-power terminals can transmit data more efficiently and with fewer retransmissions, thereby expanding transmission range without proportionally increasing delay.
Solution Approach 2:
The patent implements self-service by enabling mobile terminals to autonomously determine their suitability as forwarding nodes based on their own uplink transmit power measurements. Each terminal evaluates its own transmit power against a threshold and independently decides whether to participate in forwarding. This self-service mechanism reduces control signaling overhead and forwarding delay, as terminals do not require complex coordination or assignment protocols to determine their forwarding role.
3Device complexity
If selective forwarding is implemented based on transmit power, then signaling overhead is reduced, but forwarding efficiency may be compromised
Solution Approach 1:
The patent changes the selection parameter from arbitrary or uniform terminal selection to transmit power-based selection. By using uplink transmit power as the criterion, the system identifies terminals with inherent transmission advantages. This parameter change ensures that selective forwarding does not compromise efficiency, as the selected terminals are those most capable of effective data transmission, thereby maintaining high forwarding efficiency while reducing signaling overhead associated with coordinating all terminals.
Data Source
AI summary
A forwarding control method, an information transmission method for a mobile terminal, and apparatuses thereof, are provided. A method comprises determining uplink transmit power of at least one mobile terminal, and determining, at least according to the uplink transmit power, a forwarding policy of measured data of the mobile terminal corresponding to the uplink transmit power. According to uplink transmit power of a mobile terminal, a forwarding policy of respective information can be determined and forwarding of the information can be selectively triggered, so as to facilitate reducing signaling overhead and delay caused by unnecessary forwarding while improving forwarding efficiency.