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CDMA Development Group. TSG-S Feature Definition for Wireless Local Loop. Rick L. Willis CDG WLL Technical Team. 041400. Base Station. Wireless Switch. What is the Wireless Local Loop feature?. Local Loop provided wirelessly Alternative to the exclusively wired local loop

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what is the wireless local loop feature

Base

Station

Wireless Switch

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

E1/T1

what is local loop

Wire Line Switch

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

RJ-11

network topography options

Network

Feature Server

Gateway

Local

End Office

Base

Station

Base

Station

Base

Station

Wireless Switch

Wireless Switch

Network Topography Options

FR/ATM/IP

E1/T1

Digital Loop Carrier (V5.2 or TR303)

Access Controller

E1/T1

Traditional

Trunk Options

(ANSI/CCITT ISUP,

R1/R2 MF, etc)

E1/T1

wireless device options

...

...

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

mobility options
Mobility Options
  • No Mobility
  • Limited Mobility
  • Full Mobility
vertical feature options
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 ...
service provider control of the feature
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
wireless local loop feature characteristics
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