Point to Point

1
Point to Point Point to Multipoint Broadband
Application Enablers

• February 20, 2001
• Mike Fink
• SVP Architecture Advanced Technology

2
Network Deployment Tradeoffs

• Spectrum
• Capacity
• Real Estate Indoor, Rooftop, IFL
• Range
• Ease of Use
• Cost

3
WinStar 38 GHz Spectrum Holdings
4
28 GHz Spectrum

• New York
• San Francisco
• San Jose
• Salt Lake City
• New Orleans
• Orlando
• Greensboro
• Norfolk

5
PTP Spectrum Usage
700MHz
Up Link
Down Link
50 MHz
FCC Channel
50 MHz
20
8xT1
20
40
DS3
40
Today
12.5
Narrowband DS3
12.5
50
OC3 Ver 1
50
28
28
OC3 Ver 2
Emerging
2x50 MHz
OC12 Ver 1
2x50 MHz
6
PTP and PMP Usage, Spectrum, and Antennas
Bandwidth Size
Technology
Antennas
Capacity/FCC
8xT1 1 25MB
PTP


10
10
10
10
10
2
5x40 Mbps
200 MB
PMP
12.5
12.5




4 180 MB
4x45 Mbps (DS-3s)
12.5
12.5
7
Siemens PMP Frequency Usage
700 MHz T-R Spacing
50 MHz Upstream Channel
50 MHz Downstream Channel
Siemens
F1
F1
F2
F2
F3
F3
F4
F4
F5
F5

• 5 x 1-10 MHz Sub-Channels
• FDMA or TDMA
• Payload to 40 Mb/Sub-Channel

• 5 x 1-10 MHz Sub-Channels
• QPSK, 16QAM or 64QAM
• Payload to 40 Mb/Sub-Channel

8
PMP/PTP Coverage/Capacity and Comparisons
.86 Miles
13.3 Mbs
F1
F2 F1
.67 Miles
27 Mbs
F1 F2
.52 Miles
PTP 1.16 Miles
45 Mbs
9
Range Variation from Antenna Selection PMP PTP
90 sector
45 sector
22.5 sector
8T1 PTP
OC3 PTP
DS3 PTP
.5 .57 .63 .86 .93 1.0
1.13 1.16 1.33
45 MB 13 MB
Distance
10
Comparison of Antenna Usage at Hub PMP vs. PTP
20
PTP
Antennas
7
PMP
2
1
4
8
11
15
18
20
Buildings Added in Sector
11
PTP vs PMP OverSubscription

• 
  

21 Redundant Oversubscribed PMP Sectors
25 MHz
61 Redundant Fixed Bandwidth PMP Sectors
15 Point to Point Links
600 MHz
12
PTP vs PMP OverSubscription
1 Oversubscribed Redundant PMP Sectors

• 
  

20 MHz
15 PTP Links 600 MHz
2 Fixed Bandwidth Redundant PMP Sectors
13
TDM / ATM Architecture Comparison
B-Site
B-Site
HUB
PTP/PMP
PTP/PMP
PTP/PMP
PTP/PMP
M 1/3
M 1/3
ATM A/C
DLC
M 1/3
M 1/3
Backhaul
Backhaul
Backhaul
TDM
ATM
14
Point-to-Point Radio

• Relatively Easy to Deploy
• Burns Resources Used or Not
• Not Spectrally Efficient
• Higher Capacity Potential (New High Capacity
  Products on the Way OC6/OC12)
• Real Estate Burdensome
• Reasonably Cost Effective

15
Point-to-Multi-Point

• High Initial Costs Require Strong Demand
• Very Real Estate Efficient
• Spectrum Efficient
• Excellent Product to Reduce Current Hub
  Congestion Issues
• Limited Range vs PTP
• Requires Traffic Management Capability

16
Applications Were Offering Using Our PMP/ATM
Infrastructure

• Toll quality voice Local Long Distance
• Utilizing ATM QOS
• High Speed Internet / Broadband Access
• Business Essentials / Office.Com
• Frame Relay
• Private Line / MANs
• Native ATM
• IP VPNs
• Burstable Bandwidth On Demand

17
How it all comes together