Patent AU-2020102248-A4 (AU)
Title: Method for Minimizing the Specific Absorption Values of the Multi-Homed Heterogeneous Wireless Devices
Inventor: SARAVANAN M
IPC: H04B1/3827
Filed: 2020-09-15
Granted: 2020-10-29
Abstract: Method for Minimizing the Specific Absorption Values of the 
Multi-Homed Heterogeneous Wireless Devices 
ABSTRACT 
Today people use mobile devices for various purpose such as voice call, video call, text 
message, multimedia message, E-Mail, online shopping, online ticket reservation, online 
banking, webinar, etc. To access those services, the mobile device has to get connected with any 
one of the nearby access point or base station. These access points or base stations may provide 
the services with different network standards and therefore every access point or base station will 
get differs in bandwidth level (data speed), frequency of the signal, signal encoding scheme, 
packet delay, transmitting power, energy consumption, cost, etc. Also, based on the distance 
between the mobile and the base station the signal intensity will also get changed. The mobile 
devices will spend less amount of energy to reach the nearby access point or base station and it 
will spend more energy to reach the access point or base station located far away from the 
mobile.  
When the mobile device moves from one place to another place the connectivity between 
the access point or base station may get lost due to poor signal strength, and for continuing the 
ongoing services without interruption, the mobile device has to search for the available access 
point or base station located near enough to the mobile device. During the search process, the 
mobile device may detect multiple access points or base stations and in this scenario, the mobile 
has to select any one of the available access point or base station based the parameters such as 
signal strength, bandwidth, packet delay, energy consumption, network standard used, security 
level, etc.  
From the literature survey, it is observed that the radio signal used by the mobile devices 
may create some health issues to human beings. Also, the WHO groups the radio frequency used 
by the mobile device in the "possible group 2B carcinogen" and for this group, there is no proper 
evidence that it is safe enough or not. The impact of this radio signal on the human tissue can be 
measured using specific absorption rate (SAR) value. This SAR value has to be minimized to 
reduce the biological effect of the radio signal on the human body. This proposed network 
selection model is developed for selecting the right access point or base station with minimized 
biological effect on the human body and with high quality of service. This proposes an 
architecture for network selection that will save human health and it will improve the quality of 
service with a considerable difference.
QoSMonitoring 
NO 
QDD:>= T7 
YES 
if NO Stay in Current AP:BS 
CNC is Bad T oAvoid Unbeneficial 
Enough? handoff 
YES 
Sean fir the nearby APs/BSs 
if 
AP~s Bs detected NO 
with required 
YES 
Estimate SAR for all APi/BSi as 
ESAR=(FoC x TrPTBR 
Select APBS ofsame 
standard with minimum NO SelectanAPSof differeftstndaid 
ESAR value and perform HH possible? with minimum E SAR value and 
HH pFrilrf VH 
Figure 2: Flow Diagram of HQoNSM