Progress Report Green Network Project Haluk Celebi Manu Dhundi Nourah Alhassoun Sushant Bhardwaj Yasser Mohammed

General Project Description The project deals with small cells (i. e. femto cells, pico cells) The goal is to develop scalable sleep/awake scheduling algorithms, minimize energy consumed by base stations and maintain connectivity

Objectives till mid-term 1.Define 2 simple on/off algorithms for baseline project 2. Define max threshold distance X max of a base station and define a maximum tolerable delay t max for each user 3. Write simulators for the 2 baseline projects. 4. Plot average delays t avg and X avg vs. range of X th 5. Calculate the percentage of energy saved w.r.t operation when BSs are not turned off.

Simulation Parameters Topology: 100 x 100 Box size is 5 i.e. 400 boxes in the grid Number of Base Stations: 50 Number of Mobile Stations (Users): 2500 BS active rate: 0.5; BS sleep rate: 0.2 (Poisson)

Objectives: I. Initial Simulations Experiment 1 1.Randomly populate the topology (grid) with BSs and MSs. Max of 1 BS per BS box. 2.Define an on/off algorithm: A base station is turned off for a fixed percentage of the total period 3.Define threshold distance R max of a base station = 1 to 36 4.Define a maximum tolerable delay t max for each user = 1

Simulation Results: Ravg: When the Rth is large, the Ravg reaches an expected value. This is expected to be almost constant for large values of Rth. When Rth is very small, then there is a very low chance that the MS will find a BS within the Rth in time Tmax. Chance of finding a BS will increase with increase in Rth. Hence the Ravg decreases initially with the increase of Rth.

Tavg: It monotonically decreases with Rth. This is because larger the Rth, higher chance of finding a BS within the Rth without having to wait. Simulation Results:

Objectives: I. Initial Simulations Experiment 2 1.Randomly populate the topology (grid) with MSs. Placing BSs on first 50 highest populated areas. 2.Define an on/off algorithm: A base station is turned off for a fixed percentage of the total period 3.Define threshold distance R max of a base station = 1 to 40 4.Define a maximum tolerable delay t max for each user = 5

Simulation Results: Ravg: When the Rth is large, the Ravg almost reaches a constant value. When Rth is very small, probability that MS will find a BS within the Rth in time Tmax is small.

Simulation Results: Tavg decreases with Rth. The larger Rth, the higher chance MS finds a BS within the Rth without any waiting time

Combining Experiment 1 and 2 Results (Ravg):

Combining Experiment 1 and 2 Results (Tavg):

Percentage of Energy Saved:

Q & A