Signal-Strength-Guided Intra-Cell Forwarding in Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless local area networks (WLANs), the limited communication capabilities of client stations restrict the coverage area, leading to inefficiencies in data forwarding, as they often cannot reach the access point, and existing intra-cell forwarding techniques are complex and resource-intensive.
Innovation Solution
The Signal-Strength-Guided-Intra-Cell Forwarding (SGIF) method determines whether to forward a message based on the Observed Access Point Signal Strength (OASS), limiting forwarders to stations closer to the access point by comparing the OASS of the receiving station to that of the transmitting station, with a predetermined criterion to minimize duplicate copies and reduce communication overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If intra-cell upstream data forwarding is implemented to extend coverage area, then the effective service area of access points increases, but the complexity of setting up and maintaining forwarding paths increases significantly
Solution Approach 1:
The patent implements self-service by enabling client stations to autonomously determine their forwarding decisions based on comparing their own OASS values with the OASS values of transmitting stations included in received frames. This eliminates the need for complex centralized control mechanisms, manual path setup, and frequent control message exchanges, while still achieving the goal of extending effective service area through intra-cell forwarding.
2Reliability
If client stations exchange control messages to compute forwarding paths, then forwarding correctness is ensured, but communication overhead and computation overhead increase
Solution Approach 1:
The patent extracts the essential forwarding decision information (OASS value) directly from the received frame itself, rather than requiring separate control message exchanges. The transmitting station includes its OASS value in the frame, allowing receiving stations to make forwarding decisions based solely on comparing this embedded value with their own OASS measurements, thereby eliminating the need for additional control messages while maintaining forwarding correctness.
3Length of moving object
If client stations with limited battery power transmit over long distances, then communication reach is extended, but energy consumption increases significantly
Solution Approach 1:
The patent applies segmentation by breaking down long-distance transmissions into multiple short-hop segments through intra-cell forwarding. Instead of requiring a single long-range transmission from a distant client station to the access point, the frame is forwarded through intermediate client stations that are closer to the access point, with each station transmitting only over short distances, thereby significantly reducing total energy consumption while achieving the same communication reach.
Data Source
AI summary
Intra-cell upstream data forwarding is utilized in a wireless network such as a wireless local area network. A network forwarding path is determined based on the signal strength of an access point signal received at client stations within the network, referred to as the OASS. In particular embodiments, a station that is either originating or forwarding a frame inserts its own OASS into the frame before transmitting it and a client station that receives a frame forwards it only if its own OASS exceeds the frame-enclosed OASS, illustratively by at least a predetermined amount.