3. 2
3G Standard organizations
http:// www.ccsa.org.cn http:// www.3gpp.org
General Assembly
Council
Network and Switching
Technical Committee (TC3)
Transport and Access Network
Technical Committee (TC6)
IP and Multimedia
Technical Committee (TC1)
Network Management
Technical Committee (TC7)
Communication Power Supply
Technical Committee (TC4)
Network and Information Security
Technical Committee (TC8)
Sub Committee
Secretariat
General Office
Technology Department
Planning and Development
Department
Standardization-
Promoting Department
External Committee
Department
Advisory Committee
Wireless Communication
Technical Committee (TC5)
Mobile Internet Protocol Special
Group (TC2)
7. 6
TD-SCDMA Short-term Evolution
—— N-Frequency Cell Solution
Overcome the following problems in multiple-cell
solution for improving capacity in TD-SCDMA:
– The difficulties in cell search
– The complexity in UE measurements
– The problem in handover
– System inefficiency
Implementation of N-frequency cell
– Multiple frequency bands are configured in one cell
– A master frequency band is configured
– DwPTS and P-CCPCH are only configured for master band
8. 7
N-frequency cell＋HSDPA Multi-carrier HSDPA
HSDPA
N-frequency cell
– Multiple frequency bands are configured for one logical cell
– Facilitate to multiple frequency bands combining for HSDPA
Multi-carrier HSDPA is a combination of N-frequency
cell and HSDPA
– Higher peak data rate（N*2.8Mb/s）
– More suitable for packet services
TD-SCDMA Short Term Evolution
—— MC-HSDPA
11. 10
Principles on multi-carrier HSDPA Standardization
Air interface shall keep compatible with N-frequency
cell solution in CCSA TD-SCDMA stage I;
– Physical layer: channel structure of HS-SCCH and HS-SICH is
same to that for single-carrier HSDPA system ；
– MAC layer: segmentation/combining.
– UE Capability: adding UE multi-carrier HSDPA capability
indicator in corresponding field.
The multi-carrier HSDPA is based on 3GPP R5
HSDPA, but the changes are limited to the minimum.
TD-SCDMA Short Term Evolution
—— MC-HSDPA
12. 11
TD-SCDMA Short Term Evolution
—— MBMS
TDD MBMS Technology
MBMS( Multimedia Broadcast and Multicast Services) is an
unidirectional point to multipoint bearer service in which data
is transmitted from a single source entity to multiple recipients.
MBMS is basically a new broadcast and multicast radio bearer
technology; it can provide high speed downlink, non-voice
services for multiple users simultaneously and regardless of
user location and radio conditions in full area coverage.
13. 12
Traditional non–MBMS results in
radio resource bottlenecks by
point-to-point transmission
method
MBMS removes radio resource
bottlenecks by point-to-multipoint
transmission method
MBMS can efficiently utilize radio
resource at air interface
MBMS can perform lower prices
due to the saving in network
resources
TD-SCDMA Short Term Evolution
—— MBMS
14. 13
TDD MBMS architecture
MBMS architecture comprises four blocks: User Equipment (UE), UTRAN
(UMTS Terrestrial Radio Access Network, Core Network (including GGSN and
SGSN) and new blocks- Broadcast Multicast - Service Centre (BM-SC)
MBMS architecture enables the efficient usage of radio-network and
core-network resources, with an emphasis on radio interface efficiency
TD-SCDMA Short Term Evolution
—— MBMS
16. 15
MBMS Feature over TDD Technology
-Simulcast Combining with timeslot reused
TD-SCDMA can use selective combing and soft coming, and it can
also use simulcast combining through timeslot reused technology on
its special frame structure
The complexity of UE will be increased due to combining of multiple
radio links simultaneously in UE. But, in TD-SCDMA, it can be avoided
by combining macro-diversity with timeslot reused
Timeslot reused can increase further throughput gains on the basis of
selective combining and soft combining
TD-SCDMA Short Term Evolution
—— MBMS
19. 18
TD-SCDMA HSUPA key technology－Efficient Scheduling
With Node B-based Packet Scheduling, two main
improves:
– Cell throughput is increased by means of faster adaption to
interference variation and finer control of the total received uplink
power.
– User performance is improved by means of more frequently
reallocation of radio resource to NRT users
TD-SCDMA Short-term Evolution
—— HSUPA
21. 20
TD-SCDMA HSUPA key technology－Faster retransmission
Faster retransmission
– Reaches maximum achievable cell throughput by means of
faster retransmission of erroneously received data frame to
reduce the number of RLC retransmission, since physical
channel can be operated with higher BLER for same overall
performance under this condition, which results to an increase in
spectra efficiency.
TD-SCDMA Short-term Evolution
—— HSUPA
22. 21
TD-SCDMA HSUPA key technology－Higher order modulation
• Higher order modulation improve spectrum efficiency in good
propagation condition.
Qk
Ik
Qk
Ik
QPSK
8PSK
16QAM
TD-SCDMA Short-term Evolution
—— HSUPA
23. 22
TD-SCDMA HSUPA’s latest progress
In March, 2006, at the TSG RAN meeting #31, a new work
item proposal (“Proposed Work Item on 1.28 Mcps TDD
Enhanced Uplink “) was approved. ZTE takes part in this WI
with other companies.
The WI includes the following sub WIs:
1.28 Mcps TDD Enhanced Uplink: Physical Layer
1.28 Mcps TDD Enhanced Uplink: Layer 2 and 3 Protocol
Aspects
1.28 Mcps TDD Enhanced Uplink: UTRAN Iub/Iur Protocol
Aspects
1.28 Mcps TDD Enhanced Uplink: RF Radio Transmission/
Reception, System Performance Requirements and
Conformance Testing
TD-SCDMA Short-term Evolution
—— HSUPA
25. 24
3GPP Long-term Evolution
—— Target
Significantly increased peak data rate e.g. 100 Mbps (downlink) and 50 Mbps
(uplink)
Increase “cell edge bitrate” whilst maintaining same site locations as
deployed today
Significantly improved spectrum efficiency ( e.g. 2-4 x Rel6)
Possibility for a Radio-access network latency (user-plane UE – RNC (or
corresponding node above Node B) - UE) below 10 ms
Significantly reduced C-plane latency (e.g. including the possibility to
exchange user-plane data starting from camped-state with a transition time
of less than 100 ms (excluding downlink paging delay))
Scaleable bandwidth
5, 10, 20 and possibly 15 MHz
[1.25,] 2.5 MHz: to allow flexibility in narrow spectral allocations where
the system may be deployed
Support for inter-working with existing 3G systems and non-3GPP specified
systems
26. 25
3GPP Long-term Evolution
—— Target
Further enhanced MBMS
Reduced CAPEX and OPEX including backhaul
Cost effective migration from Rel-6 UTRA radio interface and
architecture
Reasonable system and terminal complexity, cost, and power
consumption.
Support of further enhanced IMS and core network
Backwards compatibility is highly desirable, but the trade off versus
performance and/or capability enhancements should be carefully
considered.
Efficient support of the various types of services, especially from the
PS domain (e.g. Voice over IP, Presence)
System should be optimized for low mobile speed but also support
high mobile speed
Operation in paired and unpaired spectrum should not be precluded
Possibility for simplified co-existence between operators in adjacent
bands as well as cross-border co-existence
29. 28
3GPP Long-term Evolution
—— Development Status
The requirement of LTE (TR25.913) is approved at 3GPP TSG RAN #28
meeting in 2005.6
Now 3GPP TSG RAN is working on the TR25.912 (Feasibility Study for
EUTRA and EUTRAN)
– WG1：Physical layer aspects (TR25.814)
– WG2： Radio interface protocol aspects (TR25.813)
– WG3： Radio access architecture and interfaces (TR R3.018)
– WG4： Radio performance and protocol aspects
30. 29
3GPP Long-term Evolution
—— Development Status
TR25.913 V7.2.0
Requirements for EUTRA and UTRAN
TR25.912 V0.0.4 [RP-060168]
Feasibility Study for EUTRA and EUTRAN
WG1 WG2
TR25.814 V1.2.0
Physical layer aspects for EUTRA
(RP-060201)
Editor: NTT DoCoMo
TR25.813 V0.5.1
EUTRA and EUTRAN
Radio interface protocol
aspects
(RP-060176)
Editor: Nokia, LG, NEC,
Motorola, Samsung
WG3
TR R3.018 V0.2.0
EUTRA and EUTRAN Radio Access
Architecture and Interfaces
Editor:
Vodafone, Ericsson
WG4
SI TR: NTT DoCoMo
Base Station: Ericsson
Terminal: Motorola
RRM: Nokia
RF System Scenarios:
Siemens
WG specific TRs
Outcome
31. 30
3GPP Long-term Evolution
—— ZTE’s participation
ZTE begins to attend 3GPP LTE standard work from 2005.5
ZTE is covering WG1/WG2/WG3 now
ZTE had already submitted many contributions to 3GPP RAN
WG1/WG2/WG3
ZTE is devoted to LTE key technology study
32. 31
3GPP Long-term Evolution
—— ZTE’s contribution
Frame structure and parameter adjustment
– The proposal of CP length (R1-051358) is adopted in TR25.814
Power de-grating
– The proposal of UL PAPR reduction (R1-051008) is adopted in TR25.814
Cell search
Intra-Node B Synchronization and UL timing control
Pilot design
Scheduling
Channel Multiplexing
Link adaptation
Random access
Channel coding
MIMO
Macro diversity
