shanghai, china, 14 may 2010 phan thanh hoa, ritsumeikan university, japan itu-t workshop “icts:...

Shanghai, China, 14 May 2010

Phan Thanh Hoa,Ritsumeikan University, Japan

ITU-T WORKSHOP “ICTs: Building the Green Cityof the Future”

(Shanghai, China, 14 May 2010)

An integrated mobile network supporting urban activities

Shanghai, China, 14 May 2010 2

OutlineFrom the current macro-cellular networks to different types of cellular networksA new paradigm for mobile networks A virtual single cell as the most advanced component of the integrated mobile networkFast handover scheme in the virtual single cell

1. Multicast–based Logical Macro Cell as a virtual single cell

2. Multiple polling scheme3. Support by IP-based paging networkPerformance evaluation

Mobile network supportingSocial activities


Stationary or Walking

Fast moving

Conversation

Downloading

Terminals Usage

Multimedia on cars and intelligent car-driving system - Uploading for securities

like a torched camera to protect criminals

Expansion in future- Mobile VPN: LAN extension for moving office

Divided use of cells for ubiquitous mobile communication services


Macro-cells for general Macro-cells for general communication purposescommunication purposes

Micro-cells for busy Micro-cells for busy areas (Wifi Hotspots)areas (Wifi Hotspots)

Macro-cells for the areas Macro-cells for the areas outside of micro-cellsoutside of micro-cells

Micro-cells for busy Micro-cells for busy areasareas

Micro-cells along Micro-cells along major roadsmajor roads

In future

Release of traffic of macro-cells

Present


Macro-cellular network

Hot spots & Fixed Mobile Convergence into any place

： Connected micro-cells along main streets： No micro-cell along back streets

Wide area cover with macro-cells


New paradigm for mobile networksNew paradigm

+

+Micro - cells ( Wifi Hotspots)

Macro - cellular networks

(Ordinal mobile terminals)

(Fast mobile terminals)

(Stationary terminals)

Connected micro-cells

The InternetIP- based paging net

Vertical handover

Integration of cellular networks

- Connected micro-cells - Connected micro-cells configuring a virtual single cell configuring a virtual single cell for fast moversfor fast movers-Vertical handover between Vertical handover between different mobile network typesdifferent mobile network types- Paging to any types of cellsPaging to any types of cells- Response to the paging from Response to the paging from the smallest cellthe smallest cell


Virtual single cell as a component

-

(b) Virtual single cell with Concatenated LMC.

LMC#i-1

P: PollingR: Polling response

M: Master cellS: Sub cell

(a) LMC (Logical Macro-Cell) as a virtual single cell unit.

LMC#i LMC#i+1

P&R

(M) Data and Polling response are multicast through core network

S M S S M

S

P R

S M S

R

LMC(M)Handover by new-

cell-polling response

(C#i-2) (C#i-1) (C#i)

(C#i)(C#i-1)(C#i-2) (C#i+1)

LMC switch-over as a

virtual single cell

(LMC#i-1)

(LMC#i)


#1 #2 #3 #4 #5

#1 #2 #3

#2 #3

#3

#4

#4 #5

Multicastingtunnel

BS

Gateway

Tunnel

Logical macro-cell

Triggering

Switchover

Through the same splitter.

Tunnel Tunnel

Triggering

Switchover

Switchover of Logical Macro Cell


PON as a terrestrial network of connected micro-cells network

PON: Passive Optical Network OLT: Optical Line Terminal ONU: Optical Network Unit

VPN Agent(OLT)

Trunk fibers under control of an OLT.

Virtual single LAN covering service area with a diameter of 40km

ONU

The Internet

Splitter

VPNServer

Office LAN

ONU ONU


LMCid#k-1 BS#k-2 BS#k-1 BS#k

LMCid#k BS#k-1 BS#k BS#k+1

LMCid#k+1 BS#k BS#k+1 BS#k+2

BS#k BSk+1BS#k-1

Central Control Node

(1)(2)

(3)

BS#k-1

LMCid#k-2

LMCid#k-1

LMCid#k

BS#kLMCid#k-1

LMCid#k

LMCid#k+1

BS#k+1LMCid#k

LMCid#k+1

LMCid#k+2

P R

Header

R

LM

Cid

#kR

D

LMC

id#k

RD

LM

Cid

#kR

D

(4) (4)

(4)

(5)(5)(5)

R D RD R

D

Timeout without Response

Timeout without Response

Looking up the mapping Table

P P

(1) (1)

Multicasting scenario for LMCs

Serving BS

Serving BSMT address

MT address

Serving BSMT address

(a) Location DB .

MT # i

MT # j

MT # k

Previous BS

Previous BS

Previous BS


Avoidance of inefficient pollingtaking advantage of IP-based paging

IP-based paging network

Dormant

Request with AP registration.

Active session

Mobile terminal

Paging

Mobile network

Waiting for call

Paging service request

CallThe Internet

Cease of polling when no packet transfer continues Restart of polling after the registration from the terminal side Paging and registration when called from the network side


Handover latency

-1000

100200300400500600700800900

5 10 15 20 25 30

Number of mobile terminals

Han

dove

r lat

ency

(ms)

Standard contentionSynScanParallel-pollingMultiple polling


0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

5 10 15 20 25 30

Number of mobile terminals

Thro

ughp

ut a

s a

frac

tion

of c

hann

el ra

teNormal polling Multiple- polling

1000 bytes

500 bytes

200 bytes

Overhead caused by multiple polling


05

1015202530354045

200 300 400 500 600 700 800 900 1000Polling response multicast delay (micro-second)

Thro

ughp

ut (

Mb/

s)

MT-200 bytes MT-500 bytes MT-1500 bytesBS-1500bytes

BS-500bytes

BS-200bytes

Affection of polling response multicast delay


Concluding remarksIntegrated mobile network and the IP-based paging network at the core will be a main scenario in the future mobile networkVirtual single cell as an innovation in the integrated mobile networkVirtual single cell can reduce traffic in the macro-cellular networkVirtual single cell allows high bit rate packet transfer to fast MT though it sacrifices a portion of BS throughputThere can be hopeful mobile services like mobile LAN office

shanghai, china, 14 may 2010 phan thanh hoa, ritsumeikan university, japan itu-t workshop “icts:...

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