Sb Rt l H BFSubnet Relay over HF Bearers · Trident Warrior 05 Trident Warrior 05 --UHF ... The contents of this document are proprietary to Rockwell Collins, Inc. 14. ... snr for

S b t R l HF BSubnet Relay over HF Bearers

July 19, 2007

© 2007 Rockwell Collins, Inc. All rights reserved.

O tliO tliOutlineOutline

• Introduction to Subnet Relay• Introduction to Subnet Relay

UHF Results• UHF Results

• HF Trial Results

• Conclusion

2The contents of this document are proprietary to Rockwell Collins, Inc.

Satellite NetworkingSatellite Networking

2

1

34

5

3The contents of this document are proprietary to Rockwell Collins, Inc.

SNR/Satellite NetworkingSNR/Satellite Networking

4The contents of this document are proprietary to Rockwell Collins, Inc.

Desired CapabilitiesDesired CapabilitiesDesired CapabilitiesDesired Capabilities

• Complete mobile ad-hoc networking with:

Dynamic bandwidth provisioning;

Optimal combination of relay (layer 2) and routing (layer 3) to get data between source and destination;

Ability to use multiple, standard military LOS/ELOS bearers with existing cryptos, radios, and antennas;

Standard use of IP protocols;p ;

Highest possible bandwidth available;

Completely distributed – No Master Station

5The contents of this document are proprietary to Rockwell Collins, Inc.

SNR ProtocolSNR Protocol

• Mobility and Dynamic Bandwidth Provisioning • Mobility and Dynamic Bandwidth Provisioning provided by two main elements working together:

Routing Element: OLSR-Like (Optimized Link Routing Element: OLSR Like (Optimized Link State Routing); and

MAC Element: TDMA based scheme called DSRMA (Distributed Slot Reservation Media

)Access)

6The contents of this document are proprietary to Rockwell Collins, Inc.

Routing Coverage by LayerRouting Coverage by Layer

• OLSR-Like covers range between 1-5 hops.

• DSRMA covers routing range of N2 neighbours,

• Router protocol covers remaining range according to routing protocol• Router protocol covers remaining range according to routing protocol.

7The contents of this document are proprietary to Rockwell Collins, Inc.

Spatial Slot ReSpatial Slot Re--useuse

8The contents of this document are proprietary to Rockwell Collins, Inc.

Enhanced Slot Structure Enhanced Slot Structure –– Slot MergingSlot Mergingg gg g

9The contents of this document are proprietary to Rockwell Collins, Inc.

SNR: Equipment CompositionSNR: Equipment Composition

Equipment Includes:

Standard router (e.g. Cisco);Standard router (e.g. Cisco);

SNR Node Controller (NC)SNR Node Controller (NC)with TCP Proxywith TCP Proxy

Link CryptoLink Crypto

HF/VHF/UHF ModemHF/VHF/UHF Modem

HF/VHF/UHF RadioHF/VHF/UHF Radio

10The contents of this document are proprietary to Rockwell Collins, Inc.

SDCP: SNR ControllerSDCP: SNR Controller

• SubNet Relay Controller I l dIncludes:

SNR Protocols – ad-hoc network elements;

Built-in Data Compression;Built in Data Compression;

IP Traffic Manager

11The contents of this document are proprietary to Rockwell Collins, Inc.

Trident Warrior 05 Trident Warrior 05 -- UHF SNRUHF SNR

• 4 Ships in exercise areas off Norfolk HMCS Montreal, USS Cole, USS Philippine Sea,

USS Bulkeley

12The contents of this document are proprietary to Rockwell Collins, Inc.

SNR TopologiesSNR Topologies

B

M

20 nmi

13 nmi 17 nmi

B

PS

13 nmi10.5 nmi

M

CPS M

CPS

26 nmi

Dec 6 0900 EST Dec 6 1000 EST

B

13.5 nmi

18.5 nmi21 nmi C

5 nmi35 nmi

MC PS

12.5 nmiB M PS

Dec 6 1700 ESTDec 6 1200 EST

13The contents of this document are proprietary to Rockwell Collins, Inc.

M – Montreal B – BulkeleyC – Cole PS – Philippine Sea

DRDCDRDC--Atlantic Trial ResultsAtlantic Trial Results

• Networked Underwater Warfare

• SNR with UHF bearers 4 platforms with SNR operating at 64 kbps4 platforms with SNR operating at 64 kbps Convair 580, SSK, Quest, MCDV US SSN participating

• Aircraft acted as relay at ranges up to 80 miles Periscope imagery and other data passed over network to

Maritime Warfare CentreMaritime Warfare Centre

• Database on SSK rebuilt by SSHing over SNR network

14The contents of this document are proprietary to Rockwell Collins, Inc.

Why HF?Why HF?

~500 nm ~60 nm ~160 nm

15The contents of this document are proprietary to Rockwell Collins, Inc.

SNR with HF BearersSNR with HF Bearers

• Slot re-use concernsI t f• Interference

• Overheads and cycle times greater by a factor of 3 or more from UHF• What is being supported? g

SNR designed for near-real time services

• Has been used successfully with small networks• No topological issues if spatial slot re-use is eliminated No topological issues if spatial slot re use is eliminated

Poor scaling to larger networks

16The contents of this document are proprietary to Rockwell Collins, Inc.

Tactical Communications Tactical Communications Requirements Requirements Tactical Communications Tactical Communications Requirements Requirements

TW 05 HF Multichannel Trial TW 05 HF Multichannel Trial –– New ZealandNew Zealand

17The contents of this document are proprietary to Rockwell Collins, Inc.

TCP(L) Avg Throughput vs Slot Size(All Informed Topology)

33.08

29.2426.82

29.84

25.00

30.00

35.00

kbps

)

64 kbps

17.4817.3718.1118.52

5 00

10.00

15.00

20.00

Thro

ughp

ut (k

p

32 kbps

9.6 kbps

3.2 kbps

1.62 1.664.344.81 4.97

0.00

5.00

800 1040 1280 1400 1680 1760 2000

Slot Size (ms)

18The contents of this document are proprietary to Rockwell Collins, Inc.

TCP(L) Avg Throughput vs Slot Size(In-Line Topology)

9.73

11.36 11.2410.72

8 00

10.00

12.00

ps)

6.176.065.58

4.914.00

6.00

8.00

Thro

ughp

ut (k

bp 64 kbps

32 kbps

9.6 kbps

3.2 kbps

0.18 0.341.261.00 1.090.00

2.00

800 1040 1280 1400 1640 1760 2000

Slot Size (ms)

19The contents of this document are proprietary to Rockwell Collins, Inc.

Subnet Relay HF Air TrialSubnet Relay HF Air Trial

• Conducted using a CP-140 Aurora out of Greenwood, NS

• Temporary Ground Station established at Osbourne Head, NS

• Surface wave range consistent with Barrick Model predictions 200-300 nm

• Altitude varied from 300 – 10000 ft over trial period No discernable impact on signal quality

20The contents of this document are proprietary to Rockwell Collins, Inc.

21The contents of this document are proprietary to Rockwell Collins, Inc.

100 kB file transfer from MPA to Groundstation (6.4/3.2)100 kB file transfer from MPA to Groundstation (6.4/3.2)

22The contents of this document are proprietary to Rockwell Collins, Inc.

Slot alloc for previous transferSlot alloc for previous transfer

23The contents of this document are proprietary to Rockwell Collins, Inc.

100 kB ftp file transfer from MPA to groundstation (9.6/8.0)100 kB ftp file transfer from MPA to groundstation (9.6/8.0)

24The contents of this document are proprietary to Rockwell Collins, Inc.

ConclusionConclusion

• Subnet Relay has been successfully demonstrated with HF bearers

• Surface wave propagation of HF provides ranges which are h t th th hi h b hi d ith UHF much greater than those which can be achieved with UHF

bearers – even when airborne relays are included

• Lower data rates and higher overheads limits the types of • Lower data rates and higher overheads limits the types of services which can be supported Chat File transfers E-mail Imagery (?)

25The contents of this document are proprietary to Rockwell Collins, Inc.