Transcript TC-20071017-012_TIA_Update_ESN_Exhaustion_2007_10_12.ppt

Update on ESN Exhaustion and
Issues Related to Recovery of
Previously Assigned ESNs
John Derr, Staff Director, Technical Regulatory Affairs
ESN Administrator, TIA
Gary Pellegrino, Chair TR-45 Ad Hoc ESN/UIM/MEID
CommFlow Resources, Inc.
October 2007
Electronic Serial Numbers (ESN)A Finite Resource!
2
Exhaustion of Present ESN
Resource
 As of 2007.09.30, 264 blocks of 250K (262,144)


3
“virgin” (previously unassigned) Electronic
Serial Numbers (ESNs) remain, or only 69.2
million
Virgin ESN Exhaust expected early Q1’08
Set manufacturers (MFRs) starting to provision
more Mobile Equipment IDentifiers (MEIDs) but
some service providers are still asking for ESNprovisioned handsets
Recovering Previously Assigned
ESNs Complex and often Difficult
 Some companies are no longer in business
 Other recipients are still in business but may
refuse permission to utilize used or unused
ESNs
 Some companies that still exist are cooperative,
but may not know what production range was
used
– It is difficult finding personnel who have any knowledge of
previous usage of Code ranges—service provider
assistance is welcome
4
Increased Global Demand for
Numbering Resources
 Recovery of previously assigned ESNs for

5
suitable re-use is NOT an intermediate-term
solution to implementing MEID in mobile stations
and/or the Expanded UIM_ID (“E-UIM_ID”) used
in Removable User Identity Modules (“R-UIM”)
Increased global demand is outstripping
recovery efforts making accelerated service
provider implementation of MEID, E-UIM_ID
critical
Technology Use Sometimes Not
Correlated with Assignment Date
 Some mobile set manufacturers may have


6
assigned entire 8-bit ESN MFR Codes (blocks of
16M, 16,777,216) to each individual production
line (in some instances with many blocks
unused)
As a result, some ESN Codes assigned in 1990s
or even 1980s may have mix of AMPS, TDMA and
even CDMA
Sometimes production ranges are not known.
Those ranges with no-CDMA use are candidates
for UIM_ID derivation
Timeline of ESN Exhaustion
 As of 2007.09.30, there are 264 blocks of
250K serial numbers remaining
– 40 blocks remain to be assigned in MFR Code
016
– MFR Codes 017 (64 blocks) and 018 (64 blocks)
will be assigned next
– Finally, the last virgin blocks in MFR Codes 250
(40 blocks) and 255 (56 blocks) will be assigned
at which time the Virgin ESN Pool will be
exhausted (expected early Q1’08)
7
Timeline of ESN Exhaustion
(continued)
 After virgin ESN exhaust, assigned code ranges


8
with no known use will be candidates for ESN
assignment after a short consultation with North
American service providers and clearinghouse
and inter-carrier mediation vendors (this
consultation process underway now).
“Clear” ranges available after virgin ESN
exhaust is expected to be limited
Some ranges thought to be “clear” have shown
live subscribers after consultation process and
may no longer be suitable candidates
Timeline of ESN Exhaustion
(continued)
 ESN Administrator requesting repeat applicants

to provision all new mobile set models with
MEIDs
At this point in time, ESNs should be used only
for existing set models still in production until
their “end of life”
– This is a prudent approach and helps minimize the
possibility of ESNs exhausting in the middle of the model’s
production life
 However, the cooperation of service providers in
requesting and accepting MEID-provisioned
handsets is critical
9
ESNs Used for UIM_ID Derivation
 ESNs have been used for UIM_ID derivation since



10
September 2001
Of ~385.9M ESNs designated for UIM_IDs through
September 2007 (6 year period); ~156.5M or 40.5%
have been designated in first 9 months of 2007
(see graphic on next page)
ESNs designated for UIM_ID derivation in the first
9 months of 2007 (~156.5M) exceeds by 21% the
amount (~128.9M) designated for the three
previous calendar years, 2004, 2005 and 2006!
Efforts are continuing in earnest to identify and
provide additional suitable ESN ranges for UIM_ID
derivation
ESNs Used for UIM_ID Derivation
(Accelerating Demand in 2007)
180,000,000
160,000,000
140,000,000
120,000,000
100,000,000
80,000,000
60,000,000
40,000,000
20,000,000
ESNs
11
0
2004
2005
2006
2007
(9 Months)
ESNs Used for UIM_ID Derivation
(Accelerating Demand in 2007)
 There have been reports that R-UIM
service providers in Asia-Pacific region
may be requesting R-UIM suppliers to
provide all R-UIMs sufficient to launch a
new service prior to “day one” of launch
– If this is true, demand for a limited resource is
being further exacerbated and this practice needs
to be reviewed
12
ESNs Used for UIM_ID Derivation
(continued)
 ESN Administrator’s monthly report contains

additional information concerning recovery of
previously assigned ESNs and ESNs designated
for UIM_ID derivation. See Section III.
Virgin space assigned (or designated) for
UIM_ID Code derivation is presently available to
be considered for possible future non-CDMA
technology use
– The U.S. analog sunset date (February 18, 2008) as
planned by the U.S. Federal Communications Commission
(FCC) may not remove obligation to assign an ESN MFR
Code to requestors (as some rural U.S. service providers
may voluntarily opt to continue analog service).
13
ESNs Used for UIM_ID Derivation
(continued)
 Following Virgin ESN exhaust, efforts to


14
designate AMPS-only and/or TDMA-only code
ranges (no CDMA use) for UIM_ID derivation will
continue
However, the skyrocketing demand in 2007 for
UIM_IDs along with the lack of information
regarding ESN Code range technology use still
limits the prudent lifetime of UIM_IDs
KDDI has been very helpful in targeting recovery
of ESNs from Japanese-domiciled set MFRs to
use for UIM_ID derivation. Other service
providers are also welcome to provide assistance
to the ESN Administrator
ESNs Used for UIM_ID Derivation
(continued)
 Demand for ESNs used in mobile stations has
been mitigated with increasing assignments and
service provider deployments of MEIDs
– ~ 92.0M ESNs assigned in first 9 months of 2007
– ~134.2M MEIDs assigned in first 9 months of 2007
 In like manner, in 2008, the demand for UIM_IDs
must also be mitigated by the provisioning and
service provider deployments of Expanded
UIM_ID (“E-UIM_ID”)
15
Reference Information
 Information on migration to MEIDs
from ESNs may be found (updated
on monthly basis) at,
www.tiaonline.org/standards/resources/esn and
www.tiaonline.org/standards/resources/meid
16
Acronyms













17
AMPS – Advanced Mobile Phone System
E-UIM_ID – Expanded UIM_ID (replacement for UIM_ID)
ESN – Electronic Serial Number
EUMAG – ESN/UIM/MEID Ad Hoc Group of TR-45
CDMA – Code Division Multiple Access
MEID – Mobile Equipment IDentifier (replacement for ESN)
MFR – Manufacturer
R-UIM – Removable User Identity Module
TDMA – Time Division Multiple Access
TIA – Telecommunications Industry Association
TR-45 – TIA Engineering Committee on Mobile and Personal
Communications Systems Standards
UIM – User Identity Module
UIM_ID – UIM IDentifier
Contacts, Information
Further Comments, Inquiries Welcome
Gary Pellegrino, Chair TR-45 EUMAG
([email protected])
John Derr, ESN Administrator
([email protected])
Cheryl J. Blum, Chair TR-45
([email protected])
Edward F. Mikoski, Jr.
TIA Vice President, Standards & Business Development
([email protected])
18