Introduction to WiMAX (IEEE 802.16) and 3GPP LTE-A

WiMAX1
2011/8/3
PMP architecture, Relay architecture, MESH architecture IEEE 802.16 MAC layer
CSCPSPS, QoS , Handoff , IEEE 802.16 Physical layer
TDD & FDD, , OFDM & OFDMA, Frame structure
3GPP LTE
WiMAX
3
Access)””
IEEE 802.16 standard
””(Metropolitan Area Network, MAN)(up to 30 miles) (up to 70 Mbps)

2011/8/3
4
WiMAX
802.16-2004 (IEEE 802.16d) 2004 IEEE
WiMAX 802.16-2005 (IEEE 802.16e) 2005 IEEE
3GPP
5
IEEE802.16
IEEE 802.16
IntelSAMSUNG LG
2011/8/3
6
7
standard 802.16 802.16d-2004 802.16e 802.16j 802.16m
()
10~66GHz (SCM)
2~11GHz (OFDM, OFDMA)
2~6 GHz (OFDMA)
OFDMA)
32~134 Mbps 75 Mbps 35 Mbps >35 Mbps
350 Mbps
(350 Km/h)
1~3 Mile
PMP architecture, Relay architecture, MESH architecture IEEE 802.16 MAC layer
CSCPSPS, QoS , Handoff , IEEE 802.16 Physical layer
TDD & FDD, , OFDM & OFDMA, Frame structure
3GPP LTE
WiMAX
WiMAX Network
MSSsBS

1) The point-to-multipoint (PMP) architecture
For sparse areas, ex: suburbs.
BS
IEEE 802.16j standard
relay stationsMSSs
MSSs””(MSS4) ”BS”(MSS1 and MSS5)

(BS)
2) The relay architecture For dense areas, ex: downtowns, hotspots.
two-leveltreerootBS MS-RS pairspatial reuse

(4) (Mesh Architecture)
SS
3)The mesh architecture For huge areas, ex: metropolis, large islands.
BS subscriber

PMP architecture, Relay architecture, MESH architecture IEEE 802.16 MAC layer
CSCPSPS, QoS , Handoff , IEEE 802.16 Physical layer
TDD & FDD, , OFDM & OFDMA, Frame structure
3GPP LTE
WiMAX
1) (Service-specific Convergence Sublayer, CS)
2) (Common Part Sublayer, CPS) 3) (Security Sublayer, SS)
1) (CS) I) (Classification)
(Service Data Units, SDU) (Protocol Data Unit, PDU) (Service Flow)(Connection ID)
Note (service flow)
(video stream)(file transfer) (service flow)
(Quality of Service, QoS)BS II) (Payload Header Suppression, PHS)
IPTV stream
IP



PHY
1) (Service-specific Convergence Sublayer, CS)
2) (Common Part Sublayer, CPS) 3) (Security Sublayer, SS)
2) (CPS) MAC
3) (SS)
(1) (UGS)
(maximum sustained rate)jitter (maximum latency and tolerated jitter)
MSSSS

(5) QoS (QoS service classes) (2) (real-time polling service, rtPS)
variable bit rate (VBR) MPEG (Moving pictures Experts Group)
(maximum sustained rate)jitter (maximum latency and
tolerated jitter)(minimum reserved rate)




(5) QoS (QoS service classes) (3) (extended real-time polling service, ertPS)
VoIP (VoIP with silence suppression) silence periodtraffic
BS””
(4) (non-real-time polling service, nrtPS) FTP (File Transmission
Protocols) BS
(5) (Best effort service, BE)
HTTP (Hyper Text Transmission Protocol)
(QoS BE)

(Sleep Mode)
(sleep) (Sleep Window)/; (listen)(Listening Window)/ (Sleep Cycle)
MSS(Req)BSBS(Rsp)MSSMSS BS
3

nrtPSBE
MSSBS

Ck = C02kmax , for k kmax





UGS rtPS

MSSBS//


(Transmitter) (Receiver);
(Simple Mobility Access) /( 60km/h ~120 km/h) ( Hard-Handoffs)


PMP architecture, Relay architecture, MESH architecture IEEE 802.16 MAC layer
CSCPSPS, QoS , Handoff , IEEE 802.16 Physical layer
TDD & FDD, , OFDM & OFDMA, Frame structure
3GPP LTE
WiMAX

(Uplink)(Downlink)

i–2 i - 1 i i + 1 i + 2


(6) IEEE 802.16 Physical layer 3 (Frame Duration)5 ms10 ms20 ms (5 ms)

OFDMA

time

(6) IEEE 802.16 Physical layer (Modulation and coding schemes, MCSs)
QPSK (Quaternary Phase Shift Keying)16 QAM(16- Quadrature Amplitude Modulation64 QAM (Quadrature Amplitude Modulation)
SNR (Symbol Time)
SNR

2frequency domainsubchannel time domaintime-slot frameuplink subframedownlink subframe downlink subframe
Preamble (time synchronization) Control portion
downlink map (DL-MAP)uplink map (UL_MAP) donwlinkuplink
Data portion bursts BurstMSS
uplink subframedata portion Uplinkburst””
burst7
burst4
burst2 burst3
burst
burst7
burst4
burst2 burst3
2 (OFDMA) frameBS frameRS frame””
BS frame downlink subframeBS-MSS/RS regionburstMSSsRSs uplink subframeMSS-BSRS-BS regionburstMSSRSBS
RS frame downlink subframeRS-MSS regiondownlink burstRSMSSs uplink subframeMSS-RS regionburstsMSSRSBS
Relay(Frame structure)
RS”bufferless”
Relay(Frame structure)
1 (OFDM)”mini-slot” frame
Type-1 frame (network control subframedata subframe) network network control subframe
””network topology
data subframe SSbursts guard timeburstburstburst
propagationtransmission overhead
mini-slot time
network entry
burst for SS2
burst for SSk
SS2
Type-2 frame (schedule subframedata subframe)
schedule subframe
data subframe
frame n-1 frame n frame n+1...
mini-slot time
network entry
burst for SS2
burst for SSk
SS2
PMP architecture, Relay architecture, MESH architecture IEEE 802.16 MAC layer
CSCPSPS, QoS , Handoff , IEEE 802.16 Physical layer
TDD & FDD, , OFDM & OFDMA, Frame structure
3GPP LTE
WiMAX
Relay architectures:
37
Short Cycle Long Cycle

38

39

Thank You. Q & A
Outline
(5) QoS (QoS service classes)
(5) QoS (QoS service classes)
(5) QoS (QoS service classes)
(5) (Power Saving Mechanism)
(5) (Power Saving Mechanism)
(5) (Power Saving Mechanism)
(5) (Power Saving Mechanism)
(5) (Power Saving Mechanism)
Outline