August 3-4, 2004 San Jose, CA Enabling VoWLAN Handsets with a Low Complexity Single CPU based...

August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com

Enabling VoWLAN Handsets

with a Low Complexity Single CPU based Architecture


HelloSoft, Inc. HelloSoft is a IP licensor of wireless communication

technologies: Voice over IP (Codecs and protocols) Wireless LAN (PHY and MAC) Cellular Wireless (GSM/GPRS L1, L2, and L3)

Corporate Facts: Founded in 1999 A privately held U.S. corporation Headquartered in San Jose, California Over 130 employees world-wide

World Firsts! VoIP on single RISC Processor Multi-Function WLAN/GSM/GPRS Fully Configurable WLAN Solution Low bit rate (1&2 mbps) WLAN on single RISC Processor


A Brief Visual History of VoIPT

he H

ype

Met

ric

1995Pioneer VocalTec provided the first VoIP software for PCs. Sometimes referred to as the “Internet Ham Radio”

The Trigger



he H

ype

Met

ric

1995VocalTec

August 1999TI acquires Telogy a provider of VoIP technology for $435M

July 1999Broadcom acquires HotHaus a provider of VoIP technology for $280M

The Trigger

The Peak ofInflated Expectations



he H

ype

Met

ric

1995VocalTec

August 1999Telogy

July 1999HotHaus

The Trigger


The Trough ofDisillusionment

A host of technical problems:Distortion, Delay, Echo, Expense, Scaling, Interoperablity



he H

ype

Met

ric

1995VocalTec

August 1999Telogy

July 1999HotHaus

The Trigger


The Trough ofDisillusionment

Technical problems

The Slope ofEnlightenment

The Plateau ofProductivity

Technical Advancements

ConduciveMarket Dynamics

B/2003


VoIP Technology Advancements

Distortion – losing packets in the course of transmission Due to network congestion, overcrowding, and overflowing buffer

queues. Packet loss <10% is acceptable. Today VoIP suppliers provide FEC, jitter buffers, and packet error

concealment techniques. Delay – an inordinate long time to receive the voice packet

Packet delay < 200 ms is acceptable through 100 ms is optimal A PSTN call is typically 25 ms Historically, most of the delay is not in the network but in the

equipment processing the data. Today VoIP suppliers provide a low-latency architecture (shallow

buffers) and optimized voice codecs for increased data through put.

Echo – hearing your own voice in the receiver Typically an echo lasting >25 ms is a distraction Both audio echo cancellation and line echo cancellation are now

built into the VoIP voice framework.



Call Disconnect – having to repeatedly try and connect to the receiver

VoIP Call Success Rate:

“Assessment of VoIP Service Availability in the Current Internet” – Schulzrinne and Jiang, Columbia University

Path Type Call Success

Internet 62027/(62027+292) 99.53%

Commercial 34699/(34699+171) 99.51%

Domestic (US) 19855/(19855+110) 99.45%

International 42165/(42165+165) 99.59%

VoIP over Internet success rate: 99.53%

VoIP on a private network: 99.99%

PSTN success rate: 99.99 to 99.999%

Mobil phone success rate: 97% - 98%



Aborted Calls

911 Emergency Access 911 used to be the main missing feature. Today all VoIP handsets respond in the same way as PSTN phones

via E-911. Additional features (thanks to SIP) today include voicemail, call

waiting, call forwarding, conferencing, etc.

VoIP Call Termination Probability:


VoIP Regulation Is Currently Relaxed

Today VoIP service is essentially unregulated, because VoIP is not currently defined as a “common carrier” or a “telecommunication service”. It is treated as an information service.

Bell companies and the FBI want to regulate VoIP service.

Regulation requires enabling electronic surveillance and a contribution to the Universal Service Fund.

AT&T and Jeff Pulver are effectively stating the case that VoIP is a point-to-point information service. As demonstrated by Vonage, Skype, Net2Phone and others.

Chip’s prediction: Surveillance and the USF contribution will be required.


Market Dynamics


The Emergence of VoWLAN Infrastructure

Enterprise Carrier

Handsets

SpectraLink, Telesym, Symbol, Cisco, Motorola, NEC, Vocera, Toshiba

Toshiba, Motorola, Kineto, NEC, Samsung, Nokia

Network Equipment

Cisco, Symbol, Airespace, Airflow, Meru, Nortel, Proxim

Nortel, Cisco, Proxim, Kineto, RadioFrame

PBX, Call Servers

Avaya, Nortel, Cisco, Vocera, SprectraLink

IP Centrex vendors


The Single CPU Based Architecture


Traditional Architecture of VoIP Device

• DSP: Voice Processing Algorithms (Vocoders, LEC, DTMF)• MCU: Call control, Network Protocols, RTOS, Management

(SIP, RTP, User Interface)

Data Services/Synchronization Serial

Port(Optional)

Flash RAM

MCU

Protocols,

RTOS

EthernetControlle

r

EthernetTransceiv

er

Network Interface

UserI/F

DSP

VoiceAlgorithms

PowerMgmtUnit

ROM RAM

Osc.VoiceCodecA/D,D/A

Audible Indicator

Key Pad

UserInterface

Voice I/F

PDA

10/100BaseT

User EnquirySignal

Ear Piece

Microphone


Architecture of a VoIP Device without a DSP

HelloSoft MCU contains all Voice Processing, Call control, Network Protocols, RTOS, Management

Ethernet10/100 Mbps

LAN

PowerModule

Flash

RAM

MCU

Voice Algorithms,Protocols,

RTOS

User I/F

A/D, D/A

LCDDisplay

Dialpad

Voice In

Voice Out

Audible Indicator


The Current VoWLAN Subsystem

Wireless IP Phone Reference DesignAgere Systems

July 2003Product Brief


The Current VoWLAN Subsystem

Microcontroller $8

DSP $12

Codecs (A/D, D/A) $1

WLAN (not including radio) $6

===================================

TOTAL $27


The Single Chip VoWLAN Architecture

ARM968

LBR PHY

AECengine

LCDcontroller

IODMA

Keypadcontrol

SRAMcontroller

RadioInterface

Components required for WLAN processing

Components required for Voice processing

Flashcontroller


The Single Chip VoWLAN Die Size

3.06 x 3.06 mm die100 pin package$.50 yielded die


VoWLAN Enabling IP

QoS Jitter Buffer

RTP/RTCP

TCP/IP/UDP

Driver

Voice Application/UI

RTOS

PrimeCellIP

ARM 968

LBR peripheral, encryption accelerator

Vocoder (.711 G.726 G.729AB G.723 VAD/CNG)

Acoustic Echo Canceller

Telephony (DTMF, Signal Class, CID, CPT)

SIP

Line Echo Canceller

QoS Packet Loss Concealment

Network Protocols,

Control Code

Signal Processing Components

Voice OS (Multi-channel Framework)

WLAN MAC

PCM

3rd party software

IP

Legend:

HelloSoft Software IP

ARM Processor IP

Analog Phone/SLIC or Mic/Spkr/Headset

• Complete VoIP Solution in Software

– For IP Phones, Analog Adaptors, Residential Gateways

• Unique solution on ARM for low Silicon BOM

– 1 or 2 channels on an ARM 968


IP That Enables The Single Chip Wireless Phone

Single ChipVoWLAN

RF

Antenna

Standard components1. 802.11b radio2. LCD3. Keypad4. Low speed SRAM and Flash

Microphone

Speaker

A non-Standard VoWLAN device- provides a MAC coordinated

VoIP and WLAN functionality.

Microcontroller $8DSP $12Codecs (A/D, D/A) $1WLAN (not including radio) $6===================================TOTAL $27

VoWLAN SoC $4===================================TOTAL $4

SRAM Memory

Flash Memory


Product Highlights Secure wireless voice communications:

TKIP and AEC Quality voice communications:

high packet loss environment (up to 30%) Reasonably low channel capacity requirements (4-7 calls

per access point) Low power operation Interoperable with all 802.11b and 802.11 compliant

access points Extremely low production cost (phone BOM) Field tested and proven VoIP and WLAN Patents pending Single and/or Dual channel support


VoWLAN IP SpecificationsVoIP codecs and Protocols (a software deliverable)

1. Vocoders including G711, 723.1, 726 and 729 A and B2. Low delay Jitter Buffer (under 120ms) 3. Packet Loss Concealment (PLC) 4. User configurable comfort noise insertion 5. Acoustic Echo cancellation (AEC) 6. Multi-line capability7. Caller ID 8. Call waiting 9. Call forward 10. Call transfer 11. Call hold and resume 12. Call park13. Call mute 14. Redial 15. Speed dial 16. Conference calling


WLAN IP Specifications

WLAN (a software and hardware deliverable)

1. Radio interface (hardware)– Maxim 2825 radio interface– Simple and customizable to support any digitized I&Q 22

MHz sample stream

2. LBR PHY (hardware)3. Security 802.11i (hardware and software)

– AES accelerator– TKIP

4. LBR MAC (software)5. 802.11e (software)


VoWLAN Deliverables

Product Deliverables1. ARM 968 GDSII from foundry of choice2. LBR and AES RTL code3. Ported and optimized VoIP software4. Ported and optimized WLAN MAC software5. Verification environment6. LBR and AES netlist and synthesis scripts7. Documentation

HelloSoft Design Services1. Integration into an SoC for a specified process

technology2. Device integration and testing3. System testing

Date post:	13-Dec-2015
Category:	Documents
Upload:	mavis-shelton
View:	218 times
Download:	0 times

August 3-4, 2004 San Jose, CA Enabling VoWLAN Handsets with a Low Complexity Single CPU based...

Documents