VAMOS case study

[justdream]

Dears,

Do you have VAMOS case study?
I'm little bit confused about VAMOS and searching for some case studies (if you could help)

[mahe2020]

Hi Justdream,

Check this one might be useful ...which i posted long-ago...

Hi Everyone,

Hereby attaching an overview of the VAMOS Feature - by Rohde & Schwarz

VAMOS: Voice services over Adaptive Multi-user channels on One Slot
-Added in 3GPP GERAN Release 9 specifications

Part1
-----

-General Overview of the VAMOS Feature
-Down link operation
-Unlink operation
-VAMOS UE categories
-Shifted SACCH for VAMOS II user devices
-Higher layer modifications

Part 2
------
How to test the feature with R&S Equipment

As the size of PDF is big, here by sending the you the link

http://www.rohde-schwarz.at/file_14273/1MA181_1E.pdf

Thanks & Regards
Mahe

[Ben0723]

Hi，mahe2020：

link is dead ， can u share again？

thanks a lot！

[mahe2020]

Hi Ben,

Here its direct link
http://www2.rohde-schwarz.com/file_16477/1MA181_2E.pdf

[justdream]

Dears,
could you please share practical Huawei VAMOS case you implemented in your network?
Please :-)

[Jerry]

Does anyone have specified for E*******? I am looking for that and your experience about practice VAMOS.

[Ericsson_RND]

Guys;

Can anybody share what is the requirements to activate this feature if our vendor is E*******.

BR

[topoffenders]

TEMS Visualization does support vamos features (E******* 2G), time slot monitor etc....

[sofianonline]

PFA :)
VAMOS in Huawei 29384

VAMOS applies to GSM networks for increasing voice service capacity. This feature multiplexes two calls onto one channel, especially one half-rate (HR) channel, to increase network capacity. Currently, Huawei's VAMOS allows two voice calls to be multiplexed only onto one HR channelVAMOS applies to GSM networks for increasing voice service capacity. This feature multiplexes two calls onto one channel, especially one half-rate (HR) channel, to increase network capacity. Currently, Huawei's VAMOS allows two voice calls to be multiplexed only onto one HR channel.

Contents
1 About This Document
1.1 Scope
1.2 Intended Audience
1.3 Change History
2 Overview
3 Technical Description
3.1 Overview
3.2 Key Terms
3.3 Modulation and Demodulation
3.3.1 Uplink SIC Demodulation
3.3.2 Downlink Alpha-QPSK Modulation
3.4 Multiplexing and Demultiplexing
3.4.1 Multiplexing
3.4.2 Demultiplexing
3.5 Power Control
3.5.1 Uplink SIC Power Control
Overview
Procedure of Uplink SIC Power Control
3.5.2 Downlink Alpha-QPSK Power Control
Overview
Procedure of Downlink Alpha-QPSK Power Control
4 Mute SAIC MS Identification
5 VAMOS Call Drop Solution
6 Automatic SAIC Capability Sharing
7 Related Features
8 Impact on the Network
8.1 VAMOS
8.1.1 Impact on System Capacity
8.1.2 Impact on Network Performance
8.2 Mute SAIC MS Identification
8.2.1 Impact on System Capacity
8.2.2 Impact on Network Performance
8.3 VAMOS Call Drop Solution
8.3.1 Impact on System Capacity
8.3.2 Impact on Network Performance
9 Engineering Guidelines
9.1 When to Use VAMOS
9.1.1 VAMOS
9.1.2 Mute SAIC MS Identification
9.1.3 VAMOS Call Drop Solution
9.2 Information to Be Collected
9.2.1 VAMOS
9.2.2 Mute SAIC MS Identification
9.2.3 VAMOS Call Drop Solution
9.3 Network Planning
9.3.1 VAMOS
9.3.2 Mute SAIC MS Identification
9.3.3 VAMOS Call Drop Solution
9.4 Deploying VAMOS
9.5 Deploying Mute SAIC MS Identification
9.6 Deploying VAMOS Call Drop Solution
9.7 Performance Optimization
9.7.1 VAMOS
9.7.2 Mute SAIC MS Identification and VAMOS Call Drop Solution
10 Parameters
11 Counters
12 Glossary
13 Reference Documents

[mobile4lte]

I don't understand.

[scorpion]

mobile4lte (http://www.finetopix.com/member.php?69406-mobile4lte),

Its very simple....Earlier FR-TCH become 2 * HR Channels to accommodate 2 calls in same TCH.
With Vamos, each HR-TCH will accommodate 2 Calls. So each FR-TCH can accomdate 4 * VAMOS Calls.

Got it ?

[Jerry]

Not all the phones can support this new features, called SAIC. Then you need to check the SAIC MS penetration in the network.

As VAMOS feature will imply 6dB loss in MS sensitivity, so RxLev should be better -85dBm to handle VAMOS, and VAMOS can only be used when RxQual is good.

[zeuscane]

Thread reopen

zeuscane

[justdream]

Zeuscane :handshake

Dears,
Have you succeeded to get improvement in TCH congestion after using TS for 4 users (by enable VAMOS) without noticeable degradation in CDR, MOS
Kindly share ..

[william.dg08]

Hi Ben,

Here its direct link
http://www2.rohde-schwarz.com/file_16477/1MA181_2E.pdf

The link doesnt work , please anyone can load again?

Thanks in advaced!!