TSG-S Feature Definition

for Wireless Local Loop

041400

Rick L. WillisCDG WLL Technical Team

CDMA Development Group

041400CDMA

Development Group

What is the Wireless Local Loop feature? Local Loop provided

wirelessly Alternative to the exclusively

wired local loop Flexible & rapid deployment

option in contrast to the purely wired local loop

Comprised of fewer maintenance points

Not limited to a single network topography

Supported by numerous wireless devices

WLL supports Mobility option Supports co-existence of

numerous vertical features

Wireless Switch

BaseStation

E1/T1

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Development Group

What is Local Loop? Subscriber dial tone BORSCHT functionality

• Battery feed suppling dc to the local loop

• Overvoltage protection to limit or isolate foreign voltages on the local loop

• Ringing voltage to the local loop & includes answer detection

• Signaling of hook status (on-hook & off-hook) (defined in IS-2000-A)

• Coding conversion of analog to digital and digital to analog via the codec

• Hybrid conversion of the 2-wire bi-directional local loop to a 4-wire path with separate, unidirectional transmit & receive circuits. Performs impedance matching of the local loop to provide echo cancellation

• Test access & test of the local loop

Wire Line Switch

RJ-11

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Development Group

Network Topography Options

E1/T1Wireless Switch

Gateway

Digital Loop Carrier (V5.2 or TR303)

BaseStation

BaseStation

Access Controller

TraditionalTrunk Options(ANSI/CCITT ISUP,R1/R2 MF, etc)

E1/T1

LocalEnd Office

NetworkFeature Server

Wireless Switch BaseStation

E1/T1

FR/ATM/IP

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Development Group

Wireless Device Options

Traditional Mobile Station (MS)

Network Interface Unit (NIU)

Portable Fixed Subscriber Unit

Docking Station Unit

Outdoor Network Interface Unit (NIU)

...

...

RJ-11

RJ-11

RJ-11

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Development Group

Mobility Options

No Mobility

Limited Mobility

Full Mobility

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Development Group

Vertical Feature Options

Analog Facsimile Call Forwarding Call Transfer Call Waiting Calling Party Identification Circuit Switched Data Last Call Return Limited Service Area Message Waiting Restricted Access Short Message Service Three-Way Calling User Zone Others ...

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Development Group

Service Provider Control of the Feature

Wireless Device• Device Type: switch provisioned

& requesting Wireless Local Loop at registration– No Mobility– Limited Mobility– Full Mobility

Network (Optional)• Device Type: provisioned

Wireless Local Loop– No Mobility– Limited Mobility– Full Mobility

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Development Group

Wireless Local Loop Feature Characteristics

Wireless Local Loop

• Dial Tone provided to the Calling Subscriber at Call Origination

• Signaling of Hook Status to the Serving System for use in Call Control and application of appropriate Call Treatments– On-hook– Off-hook– Stuck-off-hook