vmux-400

RAD International Technical Seminar May 2007

Presented by:

CBNetworks

Technical Support

[email protected]

http://www.cbnetworks.fr

Abis & Ater Optimization

Abis & Ater Gateway TS-2007 Slide 2http://www.cbnetworks.fr - [email protected]

Agenda

• Background

• Vmux-400/420 features

• How does it work?

• Vmux-4.xx Configurator Tool

• Statistics

• Interoperability

• Applications


Optimization Market Needs

Market potential:

• 1 Billion potential cellular subscribers in GSM rural areas (Nokia Chairman)

• Cellular backhaul relies on leased lines, private networks and satellite connections

• Backhaul costs reach 40-60% of the operator’s OpEx

• 2.5G / 3G services and mobile users increase incurs additional network investments (optimized 2G leased lines can be transferred to 3G networks)

Connectivity optimization reduces costsConnectivity optimization reduces costs


GSM Network Architecture

PSTNMSC

HLR VLR

BSCBTS

BSC

BSC

E(PCM)Vmux-2100/Gmux-2000

Interface:Solution:

A(PCM) / Ater*Vmux-2100 / 420*

Abis

BTS – Base Transceiver Station BSC – Base Station Controller (= BSS)

MSC – Mobile Switching Centre HLR & VLR – Home & Visitor Location Registers

*Depends on the GSM Transcoder location:

- if located at MSC Ater (Vmux-420)

- if located at BSC A Interface (Vmux-2100/Gmux-2000)

MSC

Vmux-400/420

BTS

BTS

BTS

BTS

BTS

BTS

BTS

BTS


Optimization and not Compression

Abis Optimized data

BSC

BTS

ABIS/ ATER contains:

1. Compressed voice

2. Idle channels

3. Silence within active calls

4. Signaling + headers [ = overhead]

5. Data (such as GPRS / EDGE)

Ater


Agenda

• Background




• Statistics


• Applications


• Average Optimization: Up to 3:1 (fractional uplink)

• User Input: 1 or 2xE1/T1 (ordering option)

• Uplink Interfaces: E1/T1, ETH/IP, Serial (all built-in)

• Clocking: Clock is transferred even when using ETH/IP

uplink

• Power Options: AC/DC

• Data compression:

Compresses ~ 10% - 15% more

during peak hours (License is needed)

• Point to Multipoint (using bundles)

• Voice CODECs

• Interoperability with all Major vendors

• Tools, such as Bandwidth Calculator, Configurator …

Vmux-400 – Features

(NEW)


• All Vmux-400 features (except Serial Uplink & T1)

• User Input: Up to 12xE1 (4, 8, or 12 - ordering option)

• Uplink Interfaces: Up to 6xE1 or ETH/IP (all built-in)

• Chassis: 1U, 19” wide

• Redundancy: full redundancy (Carrier Class Product)

• Dry Contact Alarm Relay

• TDM trunks aggregation (grooming)

• Interoperability between Vmux-400 and Vmux-420

Vmux-420 (Beta) – Features


Vmux-420 Back Panel

• 2 Fully redundant Main Modules, in case of H.W malfunction

• All ports connected to both Main Modules, supplying FULL redundancy


Vmux-400/420 Management

User terminal

ConfiguRAD

Telnet

RV-LITE + SNMP traps


Agenda

• Background




• Statistics


• Applications


Operation

Optimization process

1. Suppress Idle channels

2. Suppress traffic when there are Silence frames within active calls*

3. Remove Signaling HDLC flags (only valid signaling is transferred)

Suppress signaling FISU & LSSU (ATER segment only)

(* when DTX mode is active in the GSM network)

Optimized Data

BTS (/BSC)

ABIS (/ ATER) Compressed Voice

Vmux-400/420

Vmux-400/420

Optimization

FROM

BSC

(MSC)

1


Data Compression

• How does it works?

- The data compression unit accumulates information coming from the optimization unit and compresses it. The information is compressed similar to Zip a file in PC

• Performance

- Saves about 10 - 15% bandwidth during peak hours.

- Higher performance when there is more Data traffic (GPRS / EDGE - up to 50%)

- There are 2 compression levels: Normal level and High level.

• Why “Data”?

- The output from the optimization unit contains data and not voice

- This is non-destructive compression.

• Tradeoff for High Packet loss level

- Sensitive to packet loss therefore it is only good for networks with low packet loss.

• License dependant

Optimized + Compressed Data

BTS

ABIS / ATER Compressed Voice

Vmux-400/420

Vmux-400/420

Optimization Data Compression

1 2


Traffic Types Supported – VOICE

Voice Codecs:

• FR (Full Rate)

• EFR (Enhanced Full Rate)

• AMR (Adaptive Multi-Rate)

• HR (Half Rate)

• AMR-HR

• Vmux-400/420 can automatically detect the GSM sub-channel rate (16kbps or 8kbps)

Up to 24 timeslotsPer Vmux-400 *

* Current H.W. limitation (there is no limitation for the Vmux-420)


Traffic Types Supported – DATA

SMS / WAP:

Transferred as part of the signaling channel.

GPRS:

CS* 1,2,3 and 4 transported over timeslots configured for TRAU traffic => BTS can use any TRAU timeslot to transmit GPRS

EDGE:

Transported over timeslots configured for TRANSPARENT.

BTS must use a predefined set of

timeslots for EDGE services

*CS = Code Scheme


Clocking over TDM/IP Link

• Clock transferred from BSC to BTS over any transmission network (Adaptive clock recovery mechanism enables to transfer the clock over ETH/IP – unique feature!)

BSCBTS

(LBT) )Clk Source(

RCV (Uplink) RCV (Ingress)

Vmux-400 Vmux-400/420

TDM\IPNetwork

ADAPTIVE = ENABLE

For IP uplink

ADAPTIVE = ENABLE

For IP uplink


Clocking over Satellite IP Link

• OCXO* (ordering option) for highly accurate internal oscillator operating at 2.048Mhz 0.5 ppm (use when IP network jitter is higher than 50 msec)

BSCBTS

(LBT) )Clk Source(

Internal RCV (Ingress)

Vmux-400/OCXO

ADAPTIVE = DISABLE ADAPTIVE = DISABLEIP network

Vmux-400/420

* Only needed on the BTS side


Ts# Type Byte Bundle#

Reversal

1 Sig64 Yes 1

2 Sig64 Yes 1

| 3 Sig64 Yes 1

v 4 Dynamic Yes 1

5 Dynamic Yes 1

6 Dynamic Yes 1

7 Dynamic Yes 1

8 Dynamic Yes 1

9 Dynamic Yes 1

10 Dynamic Yes 1

Signaling Rate Detection• Signaling Rate Detection

• Vmux-400/420 can automatically detect the data rate of the signaling channels (16, 32 or 64Kbps)

BeforeBefore Vmux- 400/420 detects signaling channels rate

AfterAfter Vmux- 400/420 detects signaling channels rate


Reversal

1 Dynamic Yes 1

2 Dynamic Yes 1

| 3 Dynamic Yes 1

v 4 Dynamic Yes 1

5 Dynamic Yes 1

6 Dynamic Yes 1

7 Dynamic Yes 1

8 Dynamic Yes 1

9 Dynamic Yes 1

10 Dynamic Yes 1

Available Time Slot Types:

• TRAU: GSM Speech

• Sig64/Sig32/Sig16: HDLC Signaling, 64/32/16 kbps

• Trp64/Trp32/Trp16: Transparent data, 64/32/16 kbps





All set to DynamicAll set to Dynamic


Timeslot Type Detection (Ericsson)

• Timeslot Type Detection (EricssonEricsson)

• After reboot, the Ericsson BSS changes timeslot assignment for speech and signaling. To support this Vmux-400/420 can automatically detect the timeslot type (speech or signaling).


Reversal

1 Sig64 Yes 1

2 Sig64 Yes 1

| 3 Sig64 Yes 1

v 4 TRAU Yes 1

5 TRAU Yes 1

6 TRAU Yes 1

7 TRAU Yes 1

8 TRAU Yes 1

9 Dynamic Yes 1

10 Dynamic Yes 1

Before Vmux-400/420 detects timeslots type


Reversal

1 Dynamic Yes 1

2 Dynamic Yes 1

| 3 Dynamic Yes 1

v 4 Dynamic Yes 1

5 Dynamic Yes 1

6 Dynamic Yes 1

7 Dynamic Yes 1

8 Dynamic Yes 1

9 Dynamic Yes 1

10 Dynamic Yes 1









All set to DynamicAll set to Dynamic

After Vmux-400/420 detects timeslots type


Agenda

• Background




• Statistics


• Applications


Vmux-4.xx Configurator Tool:Step 1

1. Site survey

Collecting information from the mobile operator:

- GSM segment: ATER/ ABIS

- Vendor

- Uplink type: TDM / IP

- Timeslot assignment

- Downstream DTX (y/n)

- Clock transfer

1. Site survey

2. Configuration

3. Bandwidth estimation

Configuration Tool



2. Configuration parameters

Configure device according to the information we got from the survey.

1. Site survey

2. Configuration


Configuration Tool


BSC/BTS Configuration:(6 x TRX, 48 GSM speech channels)

Vmux-400 Time Slot Table:Display Time Slots Configuration

Ts# Type Byte Reversal Bundle#

1 -- Yes 1

2 Sig64 Yes 1

| 3 TRAU Yes 1

v 4 TRAU Yes 1

5 Sig16 Yes 1

6 TRAU Yes 1

7 TRAU Yes 1

8 TRAU Yes 1

9 TRAU Yes 1

10 TRAU Yes 1

EXAMPLE:Alcatel Time Slot Configuration









1. Site survey

2. Configuration


Configuration Tool



3. Bandwidth considerations

Bandwidth is influenced by the following parameters:

Fixed

- Timeslot assignment

- Uplink type (IP or TDM)

- Using Downstream DTX.

Estimated

- Estimated silence within calls

- Estimated idle channels

1. Site survey

2. Configuration


Configuration Tool


Vmux-4.xx Configurator Tool:Vmux-400/420 Configuration tool

Vmux-400 Configuration guide

Try it in workshopTry it in workshop

Available at: http://www.cbnetworks.fr/ftp/rad/outils/ InfoCenter Technical Resources

1. Site survey

2. Configuration


Configuration Tool


Agenda

• Background




• Statistics


• Applications


Statistics

• Uplink statistics: TDM/Serial/Ethernet uplink:Evaluate bandwidth on uplink

• Signaling statistics:Verify signaling channels are up

• TRAU statistics:TRAU traffic analyzing

• Bandwidth control statistics:Display calls stopped or discarded

• BW utilization statistics:Display enhanced information

on bandwidth consumption


Agenda

• Background




• Statistics


• Applications


Vmux-400 Interoperability

• Interoperable with all major vendors:

Ericsson, Siemens, Nokia, Alcatel-Ericsson, Siemens, Nokia, Alcatel-

Lucent, Huawei, Motorola, Nortel, …Lucent, Huawei, Motorola, Nortel, …

Vmux-400/420


Agenda

• Background




• Statistics


• Applications


ETH/IPVmux-400

Central Office

MSC BSC

E1s

HubTransceivers

E1

Vmux-400

E1

Remote Site

ETH/IP

E1

Vmux-400

BTS

Remote Site

ETH/IP

E1

Vmux-400

BTS

GSM Service to Remote / Rural Regions

• Connection via satellite, microwave, terrestrial links, flexible interfacing (IP/ETH/SERIAL/E1)

• Effective solution where the cellular operator pays for expensive transmission links

Central site solution is needed


ETH/IP

Vmux-420

Central Office

MSC BSC

E1s

HubTransceivers

Up to 12 E1

Remote Site

ETH/IP

E1

Vmux-400

BTS

Remote Site

ETH/IP

E1

Vmux-400

BTS

GSM Service to Remote / Rural Regions

• Connection via satellite, microwave, terrestrial links, flexible interfacing (IP/ETH/SERIAL/E1)

• Effective solution where the cellular operator pays for expensive transmission links


Summary

• RAD offers a full MSC-BSC-BTS cellular backhaul solution

• Cost effective voice optimization solution for central and

remote sites

• Up to 3:1 optimization of Abis/ Ater interface

• Up to 10% - 15% saving with Data Compression

• Connects over any uplink

• Interoperable with all major vendors


for your attentionthank you

• Technical Support

• [email protected]

• http://www.cbnetworks.fr


Vmux-400 Ports

E1 Uplink(Egress/Output)

to network

User E1 Ports*(Ingress/Input)

from BTS/BSC/MSC

Serial Uplink(Egress/Output)

to network

ETH/IP Uplink(Egress/Output)

to network

ETH Management

Control Port

* Ordering Options: 1 or 2 ingress E1 ports


Vmux-420 Ports

Up to 6 E1 Uplink(Egress/Output)

to network

Up to 12 User E1 Ports*(Ingress/Input) from BTS/BSC/MSC ETH/IP Uplink

(Egress/Output) to network

2 Redundant Power supplies

ControlPort

* Ordering Options: - 4,8 or 12 Ingress E1 ports- 2,4 or 6 Egress E1 ports

Alarm Relay

ETH Management

port


GSM Subchannel Rate Detection

GSM Subchannel Rate Detection

• Full Rate (FR): Each voice channel is carried in a 16 kbps sub channel

• Half Rate (HR): Each voice channel is carried in a 8 kbps sub channel

• Vmux-400/420 can automatically detect the GSM subchannel rate (16 kbps or 8 kbps)


Ericsson Time Slot ConfigurationBSC/BTS Configuration:(10.5 x TRX, 84 GSM speech channels)CH Content

1 TRXC SIGNAL2 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA3 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA4 IDLE5 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA6 IDLE7 IDLE8 IDLE9 IDLE

10 IDLE11 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA12 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA13 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA14 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA15 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA17 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA18 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA19 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA20 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA21 TRXC SIGNAL22 IDLE23 IDLE24 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA25 IDLE26 IDLE27 IDLE28 IDLE29 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA30 CF/TRXC SIGNAL31 MPLEX16 MPLEX16 MPLEX16 MPLEX16 SPEECH/DATA

CONC

UNDEFUNDEFUNDEF

UNDEFUNDEF

Sub Channel

CONC

UNDEF

UNDEFUNDEF

CONC

UNDEFUNDEF

UNDEFUNDEF

How to configure Vmux-4.xx according to the timeslots table?









• TS1, 21, 30 : Sig64

• TS2, 3, 5, 11-20, 24, 29, 31 : TRAU

• TS4, 6-10, 22-23, 25-28: : N/C.


Statistics: BW Utilization Statistics

Vmux400 / BSC ALRM

Display Total Accumulated

[ < 64 Kbps] ... (236024) [704 -767 Kbps] ... (44)

[ 64 -127 Kbps] ... (5) [768 -831 Kbps] ... (354)

[128 -191 Kbps] ... (314) [832 -895 Kbps] ... (233)

[192 -255 Kbps] ... (1203) [896 -959 Kbps] ... (23)

[256 -319 Kbps] ... (3455) [960 -1023 Kbps] ... (4)

[320 -383 Kbps] ... (14563) [1024-1087 Kbps] ... (0)

[384 -447 Kbps] ... (21003) [1088-1151 Kbps] ... (0)

[448 -511 Kbps] ... (13900) [1152-1215 Kbps] ... (4)

[512 -575 Kbps] ... (4231) [1216-1279 Kbps] ... (0)

[576 -639 Kbps] ... (911) [1280-1343 Kbps] ... (0)

[640 -703 Kbps] ... (43) [1344-1407 Kbps] ... (0)

... (N)

>

Number of seconds Number of seconds accumulated for each accumulated for each

bandwidth rangebandwidth range

Number of seconds Number of seconds accumulated for each accumulated for each

bandwidth rangebandwidth range


Vmux-400MSC BSCE1s Serial/

IP/E1

E1

Serial/IP/E1Vmux-400

BTSE1

Mobile Platforms

• Supply service to mobile platforms such as cruise ships


Vmux-400MSC BSCE1s Serial/

IP/E1

E1

Serial/IP/E1Vmux-400

BTSE1

Mobile Platforms

• Supply service in large and crowded events using trucks


Terrestrial Daisy – Chained BTS’s

• Requires Drop & Insert capability at the BTS

• Suitable when each BTS serves a small area

Vmux-400E1

MSC BSCE1s E1

TDM or IP

BTS

BTS

BTS

E1

FE1

FE1

FE1

BTS

BTS

BTS

DXC

FE1

FE1

Vmux-400 / 420

vmux-400

Documents

time slot types

ater gateway ts

xx configurator tool

cellular operator pays

expensive transmission linkshttp

timeslot type detection

agenda background vmux

agenda background vmux