Integration of Cellular and Ad Hoc Integration of Cellular and Ad Hoc conceptsconcepts

RVS Seminar SS02RVS Seminar SS02Marc DanzeisenMarc Danzeisen

1.5.2002

((motivation and brainstorming)motivation and brainstorming)

TopicsTopics

How can Ad Hoc relaying concepts improve the How can Ad Hoc relaying concepts improve the existing Cellular Networks?existing Cellular Networks? Integrated Cellular and Ad Hoc Relaying System Integrated Cellular and Ad Hoc Relaying System

(iCar): (iCar): Load balancingLoad balancing Radio power decreaseRadio power decrease Coverage extensionCoverage extension

Bluetooth for Ad Hoc relaying (some ideas)Bluetooth for Ad Hoc relaying (some ideas) BT IWF for Cellular NetworkBT IWF for Cellular Network

Tunneling or InterworkingTunneling or Interworking Signaling / Data separationSignaling / Data separation

How can Ad Hoc relaying How can Ad Hoc relaying concepts improve the existing concepts improve the existing

Cellular Networks?Cellular Networks?

Integrated Cellular and Ad Hoc Integrated Cellular and Ad Hoc Relaying System (iCar)Relaying System (iCar)

BTS B(congested)

BTS A

MH X

MH YARS1

ARS2

Mobile Host (MH)Mobile Host (MH)

Ad-hoc Relay StationAd-hoc Relay Station(ARS)(ARS)

?

NO!?

?

?

Yes

Yes

YesCall RequestCall Request

Call AcceptCall Accept

Call BlockCall Block

CallCall

Primary Relaying:Primary Relaying:

iCar iCar secondary relaying (I)secondary relaying (I)

BTS B(congested)

BTS A

MH X

MH YARS1

ARS2

Mobile Host (MH)

Ad-hoc Relay Station(ARS)

?

?

?

?

Yes

Yes Call Request

Call Accept

Call Block

Call

Yes

Yes

Secondary Relaying:Secondary Relaying:

iCar iCar secondary relaying (II)secondary relaying (II)

BTS B(congested)

BTS A

MH X

MH Y’ARS1

ARS2

Mobile Host (MH)

Ad-hoc Relay Station(ARS)

?

?

?Yes

Call Request

Call Accept

Call Block

Call

Yes

Yes

MH Y

Secondary Relaying:Secondary Relaying:

iCar iCar cascaded relayingcascaded relaying

BTS B(congested)

BTS AMH X

?

?

Yes

BTS C(congested) ARS1

MH Y

MH Z

To BTS Dor MH Z’

ARS2

?

YesYes

?

? Yes

Yes

iCar SimulationiCar Simulation

Simulation Model:

• 5x5 = 25 BTS with 50 cellular band channels• 56 ARS• Transmission range of BTS = 2 KM• ARS coverage area 500m radius

Coverage probability of 0.23• Each ARS can handle 3 cellular band channels• 25’000 MHs initially placed with uniform distribution• Simulated with GloMoSim

Results of iCar Simulation (I)Results of iCar Simulation (I)

Results of iCar Simulation (II)Results of iCar Simulation (II)

Results of iCar Simulation (III)Results of iCar Simulation (III)

Bluetooth for Ad Hoc relayingBluetooth for Ad Hoc relaying(some ideas)(some ideas)

Today: Cellular as relay for BT Today: Cellular as relay for BT devicesdevices

BT IWF for Cellular Phones?BT IWF for Cellular Phones?

Benefits:

• load balance in Hotspots• lower radio emission• lower power consumption• “easy” extension of Cellular Network• Authentication and Billing Systems (Cellular) can be reused

Open Issues:

Just an other RAN of the UMTS Core Network? BT range too short?

BTBT IWF

BSC/RNCAbis/Iur Abis/Iur

MSC/GMSC

BT as Ad Hoc relay for cellular BT as Ad Hoc relay for cellular phones?phones?

BT

BTBT

Benefits:

• Service Detection within the Bluetooth Stack (Access to BTS as service)• Ad Hoc behavior of BT (PAN Profile)• Lower BTS density• Billing and Authentication Systems (Cellular) reused• Lower radio emission

Open Issues:

BT Tunnel end point? Trust management (Multi Provider Environment) Motivation for relaying (get free minutes?) Signaling and Voice GWs

BT IWF

Abis/Iur Abis/IurBSC/RNC

MSC/GMSC

BT as local voice/data channel?BT as local voice/data channel?

BT

BT

Signaling

Data / Voice

GSM

Benefits:

• Billing and Authentication Systems (Cellular) reused• Lower radio emission (Inhouse)• Corporate Inhouse Calls like DECT• Real local Calls save Dch of BTS

Open Issues:

Separation of Voice/Data and Signaling Justification of the Cellular Signaling

ReferencesReferences Integrated Cellular and Integrated Cellular and Ad Hoc Ad Hoc Relaying Systems: Relaying Systems:

iCariCar, Wu, Qiao, De, Tonguz, IEEE Journal on selected , Wu, Qiao, De, Tonguz, IEEE Journal on selected areas in communications, vol. 19, No. 10, October 2001areas in communications, vol. 19, No. 10, October 2001

Performance Analysis Of iCarPerformance Analysis Of iCar, Wu, Qiao, Tonguz, , Wu, Qiao, Tonguz, State University of New York at Buffalo, NY 14260State University of New York at Buffalo, NY 14260

Multihop Cellular: A new Architecture for Wireless Multihop Cellular: A new Architecture for Wireless CommunicationsCommunications, Lin, Hsu, Department of Computer , Lin, Hsu, Department of Computer and Information Science National Chiao Tung University, and Information Science National Chiao Tung University, Hsinchu, TaiwanHsinchu, Taiwan

Thank you!Thank you!