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Presentation

• Mads Verwohlt and Martin H. Larsen• 6th Semester• Communication Network• Diploma engineer• Previous projects: Text Conference over W3

RTAI linux controller system

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Project Presentation

• Which multicast-scheme is best suited for mobile multiparty games, in a wireless network.

Relevant topics:• Multiparty Gaming• Bluetooth and Wireless LAN• Multicast Schemes

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Multiparty game typesGame types

Round-robin

Simultaneous-

movement

Massively Multiplayer

Online

MO-FPS First

person shooter

Latency Is tolerable Is tolerable

Is not very tolerable

Not tolerable

Max number of

players supported

Low.

Max 4-8 players

Low.

Max 4-8 players

Very high. In

thousands

High.

Max 32 players

Network traffic

required

Low Low High High

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Multiparty gaming networks

Peer-to-peer games Server-driven games

Player bandwidth usage

High Low

Max number of players supported

Low

Max. 4-8

High

Developers server expenses

None Server hardware and bandwidth

For usage with multicast

Yes Yes

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Scenario Multiparty Game

• For the scenario we chose a Server-driven game of the type Multiplayer Online First Person Shooter. (MO-FPS)– It is simpler to implement a multicast scheme

for a Server-driven game– FPS are less tolerable to latency– FPS a high rate of network traffic

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Bluetooth and Wireless LAN

Bluetooth:• Accesspoints and Piconets

WLAN and Bluetooth multicasting:• No Acks• No reliable layer 2• Throughput• Delay

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Project goals

1. Identify the features of mobile multi-party games

1. user group size

2. game session length

3. traffic volume

2. Identify the effect of the wireless environment

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Project goals

3. Study existing multicast schemes

4. Build a test bed to validate the performance of the multicast scheme.

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Scenario overview

Server

Router

Router

BluetoothAccesspoint

WLANAccesspoint

Node Node

Router

Router Router

WLANAccesspoint

Node Node

BluetoothAccesspoint

NodeNodeNode

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Choosing Scenario

Game Scenario:• A game type will be chosen. (MO-FPS)• A specific game of that type will be

selected.Test bed scenario:• A router with multicasting enabled.• Bluetooth and WLAN access points.• Computers used as nodes.

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Problem statement

• Which multicast-scheme is best suited for mobile MO-FPS games, considering packet error rate, delay and jitter in a wireless multicast environment.

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Timeplan

Feb Marts April May

Tasks 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Prestudy

Preanalysis

Delimitation of study

Analysis of multicast Schemes

Study for Experiment

Experiment

Report Writing