HITACHI CABLE. Considerations of. By Hirohide Ogawa Hitachi Cable,Ltd. Copyright(C)2005, Hitachi Cable, Ltd.

(1)

Considerations of

Wireless

VoIP

_VoIP

system

_system

By Hirohide Ogawa

(2)

1．

．

WirelessIP 5000

2．

．

Consideration of Wireless VoIP system

・

・・

・

L2 Handover

・

・・

・

L3 Handover / Roaming

　①

Maintenance of a Call state ( DNB )

　②

To be able to use immediately at the

　

(3)

1111

(4)

WirelessIP

5000

NetWorld NetWorldNetWorld

NetWorld++++InteropInteropInteropInterop 2004 Tokyo2004 Tokyo2004 Tokyo2004 Tokyo Best of Show Award

Best of Show AwardBest of Show Award Best of Show Award

Mobile and wireless products Mobile and wireless productsMobile and wireless products Mobile and wireless products

IP Telephony IP Telephony Network (SIP) Network (SIP) AP WirelessIP 5000

802.11b

Concept

：

Broad connection nature

Target

：　　

Replace inside

PHS

PHS,

PHS

, ,

,

Codeless Phone

Codeless Phone,,,,

Codeless Phone

and

(5)

2222

．

Consideration of

(6)

AP1 AP2

L2 Hand Over

AP3 AP4

L3 Hand Over

(L3 Roaming)

Segment A Segment A Segment A Segment A Segment B Segment B Segment B Segment B L3 SW L3 SW IP Telephony Server

Hand over(Roaming) Type

(7)

Move in talking.

Handover or Roaming ?

!!!!

Handover

※　

※　I define Handover and Roaming as

I define Handover and Roaming as

I define Handover and Roaming as following in this session.

following in this session.

Talking

Move in waiting (NOT talking).

!!!!

Roaming

Talking

(8)

AP1 AP2

L2 Hand Over

Condition of Handover/Roaming

!!!!

Pre

-

Condition

Same SSID Same SSIDSame SSID Same SSID

Same Authentication (WEP/802.1x/etc) Same Authentication (WEP/802.1x/etc)Same Authentication (WEP/802.1x/etc) Same Authentication (WEP/802.1x/etc)

!!!!

Communication Status Communication StatusCommunication Status Communication Status (

( (

( WiFiWiFiWiFi Error Count )WiFi Error Count )Error Count )Error Count )

Condition 2

Signal Level Signal Level Signal Level Signal Level

!!!!

Condition 1

(9)

Previous AP Previous AP BAD Scanning No AP Yes Communication Status Signal Level Good Low < Threshold Re-Try Scanning Scanning Condition of re-associating Satisfied Not Satisfied

Condition of Hand over

■ ■■ ■

■ ■■

■

Signal level

　　

Signal level > Threshold

■ ■■ ■

■ ■■

■

Communication Status

　　

Error count > Threshold

Hand over and Roaming logic

No

Condition of re

-

--

-

--

-

associating

■ ■ ■

■

To be enough signal level

　　NewAP’s Signal level

> NewAP’s Signal level + α

(10)

AP1 AP2 AP3 AP4

L3 Hand Over

Segment A Segment A Segment A Segment A Segment B Segment B Segment B Segment B L3 SW L3 SW IP Telephony Server

L3 Hand Over / Roaming

　※WirelessIP5000 don’t support Mobile IP

① Maintenance of a Call state ( DNB )

② To be able to use as IP Phone immediately

　※WirelessIP5000 don’t support Mobile IP

① Maintenance of a Call state ( DNB )

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IP Network

Station

Platform

House

WiFi

WiFi Service Area

Service Area

SSID SSID SSID

SSID “HomeHomeHomeHome” DHCP DHCP DHCP DHCP 192.168. 192.168.192.168. 192.168.xxxxxxxx

Dynamic Network

(12)

This feature is to change pre This feature is to change preThis feature is to change pre

This feature is to change pre----configured Profile (configured Profile (configured Profile (configured Profile (WiFiWiFiWiFiWiFi / / / / Authentication / Network / NAT) according to

Authentication / Network / NAT) according to Authentication / Network / NAT) according to

Authentication / Network / NAT) according to WiFiWiFiWiFiWiFi(SSID) (SSID) (SSID) (SSID) automatically. automatically. automatically. automatically.

What is DNB

　

Power ON

Configuration Configuration Configuration

Configuration 1 1 1 boot1 bootbootboot AP1 AP1 AP1 AP1 Association Association Association Association Associate Not Associate Priority（High) Configuration Configuration Configuration

Configuration　　　decide　decidedecidedecide

Priority（Mid) Turn on Configuration 2 boot Configuration 2 boot Configuration 2 boot Configuration 2 boot AP2 AP2 AP2 AP2 Association Association Association Association Configuration ConfigurationConfiguration

Configuration　　　　decidedecidedecidedecide

Associate Not Associate Priority（Low) AP3 AP3 AP3 AP3 Association AssociationAssociation Association Configuration Configuration Configuration

Configuration　　　　decidedecidedecidedecide

Associate Not Associate Configuration 3 boot Configuration 3 boot Configuration 3 boot Configuration 3 boot

!!!!

What is DNB ?

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Maintenance of a Call state

AP(Ａ) AP(Ｂ) Segment A Segment A Segment A Segment A L3 SW L3 SW IP Telephony Server IP Telephony ServerIP Telephony Server IP Telephony Server DHCP Server DHCP ServerDHCP Server DHCP Server

Talking

①　Ａｓｓｏｃｉａｔｅ　 ①　Ａｓｓｏｃｉａｔｅ　①　Ａｓｓｏｃｉａｔｅ　 ①　Ａｓｓｏｃｉａｔｅ　APAPAPAP（（（（BBBB））））　　　　　　　　Ｃｈａｎｇｅ　Ｐｒｏｆｉｌｅ（Ｃｈａｎｇｅ　Ｐｒｏｆｉｌｅ（Ｃｈａｎｇｅ　Ｐｒｏｆｉｌｅ（BＣｈａｎｇｅ　Ｐｒｏｆｉｌｅ（BBB）））） ②　②　DHCP ②　②　DHCP DHCP DHCP 　　　　　　

　　 Get New AddressGet New AddressGet New AddressGet New Address

③　 ③　③　

③　RERERERE----INVITEINVITEINVITEINVITE（（（（SIPSIPSIPSIP））））　　

　　 Modifying Address Modifying Address Modifying Address Modifying Address

・・・

・DHCPDHCPDHCPDHCP ・

・・

・Using DNB Using DNB Using DNB Using DNB

registration of 2 Profiles registration of 2 Profiles registration of 2 Profiles registration of 2 Profiles 　　　

　(Segment A and Segment B )(Segment A and Segment B )(Segment A and Segment B )(Segment A and Segment B )

!!!!

Pre

-

Condition

Ta

lkin

_g

Ta

lkin

_g

Ta

lkin

_g

Ta

lkin

_g

(14)

　　　　　　　

at the time of Roaming

4

44 4F

F

3

33 3F

F

2

22 2F

F

Segment ASegment ASegment ASegment A

Segment B Segment BSegment B Segment B Segment C Segment C Segment C Segment C Elevator Elevator Elevator Elevator <Customer Environment> <Customer Environment><Customer Environment> <Customer Environment>

Network : Different Segment every floor Network : Different Segment every floorNetwork : Different Segment every floor Network : Different Segment every floor

(10 (10 (10 (10 floor)floor)floor)floor) WiFi

WiFiWiFi

WiFi : Same E: Same E: Same E-: Same E---SSIDSSIDSSIDSSID 　　　

　　　*Several *Several *Several *Several WiFiWiFiWiFiWiFi service area of floorservice area of floorservice area of floorservice area of floor overlap. overlap.overlap. overlap. Solution 2: Solution 2:Solution 2: Solution 2:

Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was changed by send DHCP (request) after changed by send DHCP (request) after changed by send DHCP (request) after changed by send DHCP (request) after Re

ReRe

Re----association (Roaming). association (Roaming). association (Roaming). association (Roaming).

Solution 2: Solution 2:Solution 2: Solution 2:

Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was Wireless IP can judge Whether segment was changed by send DHCP (request) after changed by send DHCP (request) after changed by send DHCP (request) after changed by send DHCP (request) after Re

ReRe

Re----association (Roaming). association (Roaming). association (Roaming). association (Roaming).

⇒User can use User can use User can use User can use WirelessIP WirelessIP WirelessIP 5000 with WirelessIP 5000 with 5000 with 5000 with unconscious in moving other floor. unconscious in moving other floor. unconscious in moving other floor. unconscious in moving other floor.

⇒User can use User can use User can use User can use WirelessIP WirelessIP WirelessIP WirelessIP 5000 with 5000 with 5000 with 5000 with unconscious in moving other floor. unconscious in moving other floor. unconscious in moving other floor. unconscious in moving other floor.

Solution: Solution:Solution: Solution: DNBDNBDNBDNB　？？？　？？？　？？？　？？？ Solution: Solution:Solution: Solution: DNBDNBDNBDNB　？？？　？？？　？？？　？？？

<Solution>

⇒DNB canDNB canDNB canDNB can’t make the problem solvable.t make the problem solvable.t make the problem solvable.t make the problem solvable. Because DNB change profile by SSID. Because DNB change profile by SSID. Because DNB change profile by SSID. Because DNB change profile by SSID.

×

Same SSID Same SSID Same SSID Same SSID IP: IP:IP:

IP:　　　　Segment ASegment ASegment ASegment A

User can User canUser can

User can’t use t use t use WirelessIPt use WirelessIPWirelessIPWirelessIP 5000 in moving floor. 5000 in moving floor. 5000 in moving floor. 5000 in moving floor.

Because it keeps before floor Address depending Because it keeps before floor Address depending Because it keeps before floor Address depending Because it keeps before floor Address depending on DHCP lease time.

on DHCP lease time.on DHCP lease time. on DHCP lease time.

!!!!

Problem Point

IP: IP:IP:

(15)

HITACHI CABLE. Considerations of. By Hirohide Ogawa Hitachi Cable,Ltd. Copyright(C)2005, Hitachi Cable, Ltd.

Considerations of

Considerations of

Considerations of

Considerations of

Considerations of

Considerations of

Considerations of

Considerations of

Wireless

Wireless

Wireless

Wireless

Wireless

Wireless

Wireless

Wireless

VoIP

VoIP

VoIP

VoIP

VoIP

VoIP

VoIP

VoIP

system

system

system

system

system

system

system

system

By Hirohide Ogawa

Table of contents

Table of contents

Table of contents

Table of contents

Table of contents

Table of contents

Table of contents

Table of contents

1．

．

．

．

WirelessIP 5000

2．

．

．

．

Consideration of Wireless VoIP system

・

・・

・

L2 Handover

・

・・

・

L3 Handover / Roaming

①

①

①

①

Maintenance of a Call state ( DNB )

②

②

②

②

To be able to use immediately at the

1111

WirelessIP

WirelessIP

WirelessIP

WirelessIP

WirelessIP

WirelessIP

WirelessIP

WirelessIP

5000

_VoIP

_VoIP

_VoIP

_VoIP

_system

_system

_system

_system

　①

　①

　①

　①

　②

　②

　②

　②

：　　

：　　