Dynamic implementation of network selection policies

Abstract

Abstract-The issue of efficiently selecting the best available wireless network by a mobile device is an area of active research. Many researchers have proposed several strategies and policies for selecting the appropriate network. These policies differ among each other due to various reasons. The state and load of networks, number and types of wireless networks considered, and preferences of users are some of the reasons that attribute to differences in those proposed policies. As a result, the applicability and efficiency of those policies depend upon certain situations and circumstances. We propose, in this paper, a new concept that will help in utilizing these various policies in a manner that will give better results in a longer run and in various kinds of situations. We have a pool of policies available, and our proposed method will select the policy that is most appropriate according to the current state of user. We modeled this problem as a Markov Decision Process. In the end we provide some heuristics to support our work.

Network Access Control for Location-Based Mobile Services in Heterogeneous Wireless Networks

“…Then, it assigns scores to the elements. According to the characteristics of given services, the terminal combines the scores and applies the combined score to the network selection [12]. In the network-side selection, Common Radio Resource Management (CRRM) module, which is a network device, manages radio resources of whole wireless networks.…”

“…If 3 is stable then (6) If > then 7Find another WiFi (8) End if (9) Else (10) If > then (11) Find another WiFi and then migrate to the WiFi (12) End if (13) End if (14) Else if 2 is low then (15) If 3 is stable then (16) If ≤ then (17) Use cellular and WiFi simultaneously until the buffer meets THRD_M (18) Else (19) Use cellular and WiFi simultaneously until the buffer meets THRD_H (20) Find another WiFi and then migrate to the WiFi (21) End if (22) Else (23) If ≤ then (24) Use cellular and WiFi simultaneously until the buffer meets THRD_H (25) Find buffer, when is less than or equal to , mobile terminals simultaneously use both cellular and WiFi until the amount of data in the buffer satisfies THRD_H and then the mobile terminals search for another WiFi and migrates to the WiFi network. When is greater than , the mobile terminal only uses cellular network or finds another WiFi network to migrate to it.…”

“…If 3 is unstable then (6) Find another WiFi 7End if (8) Else if 2 is normal then (9) If 3 is stable then (10) If ≤ then (11) Find another WiFi (12) Else (13) Find another WiFi and then migrate to the WiFi (14) End if (15) Else (16) If ≤ then (17) Use cellular and WiFi simultaneously until the buffer meets THRD_M (18) Else (19) Use cellular and WiFi simultaneously until the buffer meets THRD_H (20) End if (21) End if (22) Else if 2 is low then (23) If 3 is stable then (24) If ≤ then (25) Use…”