1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN:21-07-0150-00-0000
Title: Pre-acquisition of system parameters
Date Submitted: May 09, 2007
Presented at IEEE session #20 in Montreal
Authors or Source(s): Jin Lee
Abstract: Discuss pre-acquisition of system parameters and adopt it
We have discussed this last time, and I come back with revised proposal to capture comments from last meeting

2. IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual < and in Understanding Patent Issues During IEEE Standards Development

3. Motivation and objectives
Understand how system Information interval affects synchronization delay during handover [802.16]
Reduce Handover latency by minimizing synchronization time
Possibly consider adapting same way to other networks
I want to show how system information can affect .16 handover first Because I got the motivation from side,
and check possibly adapt to other network as well

4. Handover to 802.16 Max 10s interval Every 5ms Frame
Mobile node is connected .11 network but link going down from the serving network is sent.
Mobile node start scan which available network could be near its side and .16 network is detected, possibly 16 BS sends DL-MAP and UL-MAP which indicate data burst allocation. It is usually advertised periodically every frame

5. Handover between 802.16 networks2 4 6 8 10 12
Synchronization latency (S)
DCD interval (s)
Effect of varying DCD and UCD interval on synchronization latency
UCD interval=1s
UCD interval=2s
UCD interval=5s
UCD interval=10s
Source :
=> UCD and DCD are the significant factors in synchronization latency. If these parameters are obtained untimely, serious handover latency could be expected even in heterogeneous handover

6. 3GPP LTE Initial access during HO
System Information Block
=> It shows that pre-acquisition of system information facilitates handover

7. 3GPP system information blocks / 3GPP2 system parameters
Information valid across multiple cells,
Information needed at cell/PLMN search,
Information needed prior to cell camping,
Information needed before cell access,
Information needed while camping on a cell
3gpp2 system parameters
PILOT_PN
SID - system identification
NID - network identification
BASE_ID
BASE_CLASS,,

8. PoA Specific Information Elements
Proposal (Remedy 1 )
P49 (D5.1)
Annex C.2.16 Data types of System_Information, P195 (D5.1)
Name of information elements
Description
Data type name
PoA Specific Information Elements
TYPE_IE_POA_SYESTEM_INFORMATION
System information supported by the link layer of a given PoA
SYSTEM_INFORMATION
Type Name
Derived From
Definition
Valid Range
SYSTEM_INFORMATION
SEQUENCE (NETWORK_TYPE, MAC_ADDRESS, PARAMETERS)
A Type to represent system information
N/A
PARAMETERS
CHOICE( DCD & UCD,SIB(s), SYSTEM_PARAMETERS)
System Parameters supported by the link layer of a given PoA
Values of system parameters.
(i.e. IEEE DCD&UCD,
3GPP – SIB(s),
3GPP2 – SYSTEM_PARAMETERS)