gsc11 joint 32r1 3gpp lte sae
TRANSCRIPT
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8/4/2019 Gsc11 Joint 32r1 3GPP LTE SAE
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3GPP Long Term Evolution and
System Architecture Evolution(LTE and SAE)
Francois Courau
SOURCE: ETSI
TITLE: 3GPP LTE and SAE
AGENDA ITEM: Joint 4.1
CONTACT: [email protected]
GSC11/Joint(06)_32r1
mailto:[email protected]:[email protected] -
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3GPP LTE and SAE
LTE focus is on:
enhancement of the Universal Terrestrial Radio
Access (UTRA)
optimisation of the UTRAN architecture With HSPA (downlink and uplink), UTRA will
remain highly competitive for several years
LTE project aims to ensure the continued
competitiveness of the 3GPP technologies for
the future
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3GPP LTE and SAE
SAE focus is on: enhancement of Packet Switched technology
to cope with rapid growth in IP traffic
higher data rates lower latency
packet optimised system
through
fully IP network
simplified network architecture
distributed control
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3GPP LTE and SAE
Reminder of LTE objectives Demand for higher data rates
Expectations of additional 3G spectrum allocations
Greater flexibility in frequency allocations
Continued cost reduction
Keeping up with other (including unlicensed)
technologies (eg WiMAX)
Growing experience with the take-up of 3G is helping
to clarify the likely requirements of users,operators and service providers in the
longer term
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3GPP LTE and SAE
Goal of LTE
Significantly increased peak data rates, scaled linearly
according to spectrum allocation
Targets: Instantaneous downlink peak data rate of 100Mbit/s in
a 20MHz downlink spectrum (i.e. 5 bit/s/Hz)
Instantaneous uplink peak data rate of 50Mbit/s in a
20MHz uplink spectrum (i.e. 2.5 bit/s/Hz)
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3GPP LTE and SAE
Latency issue Control-plane
Significant reductions in transition times from idle or dormant statesto active state
User-plane Radio access network latency below less than 5 ms
in unloaded condition (ie single user with single datastream) for small IP packet
Latency also being addressed in SAE
Camped-state(idle)
Active
(Cell_DCH)
Dormant
(Cell_PCH)
Less than 100msec
Less than 50msec
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3GPP LTE and SAE
Status of the work for LTE
Downlink Parameter for OFDM
Transmission BW1.25 MHz 2.5 MHz 5 MHz 10 MHz 15 MHz 20 MHz
Sub-frame duration 0.5 ms
Sub-carrier spacing 15 kHz
Sampling frequency 1.92 MHz(1/2 3.84 MHz)
3.84 MHz 7.68 MHz(2 3.84 MHz)
15.36 MHz(4 3.84 MHz)
23.04 MHz(6 3.84 MHz)
30.72 MHz(8 3.84 MHz)
FFT size 128 256 512 1024 1536 2048
Number of occupiedsub-carriers,
76 151 301 601 901 1201
Number ofOFDM symbolsper sub frame
(Short/Long CP)
7/6
CP length(s/samples)
Short (4.69/9) 6,(5.21/10) 1*
(4.69/18) 6,(5.21/20) 1 (4.69/36) 6,(5.21/40) 1 (4.69/72) 6,(5.21/80) 1 (4.69/108) 6,(5.21/120) 1 (4.69/144) 6,(5.21/160) 1
Long (16.67/32) (16.67/64) (16.67/128) (16.67/256) (16.67/384) (16.67/512)
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3GPP LTE and SAE
Uplink Parameters
(Variant including TD SCDMA framing also supported)
Transmission BW 1.25 MHz 2.5 MHz 5 MHz 10 MHz 15 MHz 20 MHz
Timeslot duration 0.675 ms
Sub-carrier spacing 15 kHz
Sampling frequency 1.92 MHz(1/2 3.84
MHz)
3.84 MHz 7.68 MHz(2 3.84 MHz)
15.36 MHz(4 3.84 MHz)
23.04 MHz(6 3.84 MHz)
30.72 MHz(8 3.84 MHz)
FFT size 128 256 512 1024 1536 2048
Number of occupiedsub-carriers,
76 151 301 601 901 1201
Number ofOFDM symbols
per Timeslot(Short/Long CP)
9/8
CP length (s/samples) Short 7.29/14 7.29/28 7.29/56 7.29/112 7.29/168 7.29/224
Long 16.67/32 16.67/64 16.67/128 16.67/256 16.67/384 16.67/512
Timeslot Interval (samples) Short 18 36 72 144 216 288
Long 16 32 64 128 192 256
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3GPP LTE and SAE
Further agreement on LTE
Currently no more macro-diversity
No soft handover required
Security
Control Plane
Ciphering and Integrity provided by eNode B (BTS)
RLC and MAC provided directly in the eNode B
User plane
Ciphering and integrity in the eAccessGateway
functionality
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3GPP LTE and SAE
SAE
Looking at the implications for the overall
architecture resulting from:
3GPPs (Radio Access Network) LTE work
3GPP All-IP Network specification (TS22.978)
the need to support mobility betweenheterogeneous access networks
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3GPP LTE and SAE
SAE Achieving mobility within the Evolved Access System Implications of using the evolved access system on existing and new
frequency bands
Adding support for non-3GPP access systems Inter-system Mobility with the Evolved Access System Roaming issues, including identifying the roaming interfaces Inter-access-system mobility Policy Control & Charging How does User Equipment discover Access Systems and
corresponding radio cells? Implications of various solutions on UserEquipment, e.g. on battery life
Implications for seamless coverage with diverse Access Systems Migration scenarios
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S5b
Evolved Packet Core
WLAN3GPP IP Access
S2
non 3GPPIP Access
S2
IASA
S5aSAE
Anchor3GPP
Anchor
S4
SGiEvolved RAN
S1
Op.
IPServ.(IMS,PSS,etc)
Rx+
GERAN
UTRAN
Gb
Iu
S3
MMEUPE
HSS
PCRF
S7
S6
* Color coding: red indicates n ew functional element / interface
SGSN GPRS Core
3GPP LTE and SAE Architecture (work in progress)
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3GPP LTE and SAE
In the Core network:
In addition to IMS services available in the current
system, equivalent CS Services may be provided by
IMS core since CS domain is not supported in LTE
Mobility Management Entity and User Plan Entity might
be collocated in the Access Gateway entity but this is
still an open point
Reduced number of nodes in the evolved packet core
may be achieved compared to current architecture to
provide connectivity to IMS
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3GPP LTE and SAE
Recent addition to the 3GPP Work plan During the last meetings a new study has been
initiated to work on evolution of HSPA called HSPA+
looking a further improvement of the HSPA (HSDPA
and HSUPA) and potentially being connected to the
SAE.
This could re-use most of the work underway in LTE
in terms of improvement for latency (protocol
evolution and functional split, but has constraints in
terms of support for legacy terminals and HWchanges).
The feasibility is first under investigation