INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Outline Introduction Motivations Objectives System Architecture Organization and Download Scheme Dynamic Self-Organization Strategy RAP Incentive Mechanism Measurement and Evaluation Summary INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network 2

Motivation • Using mobile terminals to get Internet services is becoming increasingly important in people’s daily life. • There exist drawbacks of today’s mobile data service: • Many ISPs don’t provide unlimited data plans. their network usage is always dynamic while their data plan is fixed. Sometimes their data plans are overused but underused at other times. • The downstream rate offered by current cellular networks is insufficient to meet users’ demand. Furthermore, the data rate of cellular network fluctuates severely over time. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Motivation • Previous works: • Users interested in the same video can exchange the data downloaded from cellular networks[1]. [1] L. Keller, A. Le, B. Cici, H. Seferoglu and C. Fragouli, “MicroCast: cooperative video streaming on smartphones,” in Proc. of MobiSys’12, pp. 57-70, 2012. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Motivation • Previous works: • Users interested in the same video can exchange the data downloaded from cellular networks[1]. • Mobile terminals connected to the same wireless access point can exchange the received packets among each other via Bluetooth[2]. [2] M. Ramadan, L. El Zein and Z. Dawy, “Implementation and evaluation of cooperative video streaming for mobile devices,” in Proc. of IEEE PIMRC’08, pp. 1-5, 15-18, Sept. 2008. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Motivation • Previous works: • Users interested in the same video can exchange the data downloaded from cellular networks[1]. • Mobile terminals connected to the same wireless access point can exchange the received packets among each other via Bluetooth[2]. • Nodes in close vicinity use the WLAN to discover each other, form a collaboration group, and stripe traffic across their WWAN links[3]. [3] G. Ananthanarayanan, V.N. Padmanabhan, L. Ravindranath and C.A. Thekkath, “COMBINE: leveraging the power of wireless peers through collaborative downloading,” in Proc. of MobiSys’07, pp. 286-298, 2007. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Motivation • There exist limitations in the previous works: • All the users must be interested in the same video, which implies that a user cannot be benefited if the video is “cool”. • All the participants must be aware of each other, which limits the application scenarios. • The departure of participants will break off the cooperation process, which would be a common phenomenon in mobile networks. • Build a data plan sharing system for mobile networks that allows people to exchange their sufficient data plans. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Objective • We study • How to avoid data traffic waste due to fixed data plans? • How to incent people to join the cooperative process? • How to adapt the system to the peculiarity of mobile networks? • We obtain • A data plan sharing system to allow people exchange data plans. • An incentive mechanism to encourage participation. • A dynamic self-organization strategy to construct local wireless networks. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Outline Introduction System Architecture Organization and Download Scheme Dynamic Self-Organization Strategy RAP Incentive Mechanism Measurement and Evaluation Summary INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network 9

System Architecture • Two layers of networks: • Bluetooth-Management Network (BMN): discovers potential participants and manages the construction of local download group. • WiFi-Transmission Network (WTN): exchanges downloaded data in high speed. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

System Architecture • Three types of users: • Primary user: user who needs to download data from the Internet. (User A) • Assistant user: user who helps a download user download data from the Internet. (User B & C) • Detected user: user who acts as a candidate for assistant user. (Other users) INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

System Architecture • Servers: • Management server: applies the Reputation Adaptive Pricing (RAP) and manages the virtual credits. • Resource server: can be any resource servers allowing multithreading downloading online. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Outline Introduction System Architecture Organization and Download Scheme Self-Organization Scheme Cooperative Download Scheme Dynamic Self-Organization Strategy RAP Incentive Mechanism Measurement and Evaluation Summary INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network 13

Self-Organization Scheme • The query of credits: User A gets the size of the target data and connects to the management server to check whether its surplus credits is enough to pay the download. • The construction of BMN: User A (PU) scans neighboring users via Bluetooth and invites them to be DUs in the BMN. • The construction of WTN: User A initializes its soft AP and informs parts of the DUs via Bluetooth. The DUs selected connect to the soft AP via WiFi. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Self-Organization Scheme • The query of credits: User A gets the size of the target data and connects to the management server to check whether its surplus credits is enough to pay the download. • The construction of BMN: User A (PU) scans neighboring users via Bluetooth and invites them to be DUs in the BMN. • The construction of WTN: User A initializes its soft AP and informs parts of the DUs via Bluetooth. The DUs selected connect to the soft AP via WiFi and become AUs. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Self-Organization Scheme • The reason why only parts of DUs are selected to be AUs: • There exists an upper bound for the number of clients that can connect to the same soft AP at the same time. • Severe transmission collisions would lead to the bottleneck effect of WiFi. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Cooperative Download Scheme • The initialization of download: the URL of the target data is broadcasted to the AUs. • The process of download: PU divides the data to be downloaded into small segments with constant size. The users download corresponding segments from the cellular network. For AUs the segment will be retransmitted to PU immediately. • The completion of download: all the users upload their download records to the management server. Then their virtual credits are exchanged according to RAP scheme. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Cooperative Download Scheme • Dynamic Task Dissemination Strategy • The task to download the data is divided into small tasks, and each task requests a user to download a specified data segment. All the tasks are stored in a task queue. • Once a PU/AU has finished downloading/retransmitting a segment, a new task will be assigned to it. This process keeps going on until the task queue is empty. • Once a task is time-out, it will be added back to the head of the task queue. • If an AU has no access to the Internet or it leaves the local network during downloading, the transmission blocked can still be recovered. • New users are allowed to join the download process at any time. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Dynamic Self-Organization Strategy • Power-saving Listening Method • To reduce power consumption, we make the users in listening mode to be intermittent sleeping. • E.g. with a period of 60 second, an user listens to the wireless channel for 30 seconds, and for the rest 30 seconds it keeps sleeping. • Heuristic Scanning Method • We control the interval between two adjacent scans of Bluetooth device discovery to control the power consumption in scanning mode. • The scanning interval can be extended if the results do not change a lot in adjacent scanning rounds. Otherwise it will be reduced. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

RAP Incentive Mechanism • We propose the Reputation Adaptive Pricing Scheme (RAP) to: • Provide incentives for users who help others download data; • Prevent malicious users from downloading data only and not helping others relay traffics. • The management server maintains a virtual credit account for each user as well as the download and relay history of the user. • If a user wants to utilize our system, he must register an account and, in the meanwhile, he will get a certain amount of virtual credits as the initial money. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

RAP Incentive Mechanism • Stage 1: When a PU starts a co-download task and uploads the target data size, the server calculates the adapted total price for the download process: • where INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

RAP Incentive Mechanism INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Measurement and Evaluation • Measurement of Power Consumption in Listening Mode • Measurement of Power Consumption in Scanning Mode INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Measurement and Evaluation • Evaluation of INDAPSON Download Rate • The download rate increases linearly with the number of phones. • With the maximum number of AUs controlled, the data rate of WiFi is always larger than that of 3G, and the download data rate for PU is proportional to the sum of the 3G download rates of all the phones. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Measurement and Evaluation • Simulation of RAP Incentive Scheme • Our system mitigates the problem that the number of actions of download per day decreases dramatically at the end of a month, because users can leverage others’ surplus data plan and thus avoid being charged with a much higher price. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Measurement and Evaluation • Simulation of RAP Incentive Scheme • The different punishment factors have trivial influence on the number of transactions while the percentage of Malicious Users varies. • with RAP is much less than that without RAP, and decreases as increases. represents the average benefits that a Malicious User gets every time he registers as a new user. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

Summary • We proposed a data plan sharing system based on self-organizing networks, which allows users to better manage their data traffic in a fixed data plan. • In our system, with power-saving strategies applied, multiple wireless interfaces are used to construct a two-layer local network, which adapts to the dynamic characteristics of mobile terminals. • Data are downloaded via multiple download links from the Internet, and the total download rate is improved. • With RAP applied in our system, users are able to exchange their data traffic for credits by helping other users download data. • Numerical experiments and simulations also show that our system can help users manage their data traffic effectively. INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network

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INDAPSON: An Incentive Data Plan Sharing System Based on Self-Organizing Network