Wimax Introduction Max Riegel
Wimax Introduction Max Riegel
Wimax Introduction Max Riegel
Overview
Market positioning of Mobile WiMAX
Value generation in mobile networks vs. broadband networks
fixed mobile
HSDPA WiMAX
Base case
10000 10 kbps
20000 20 kbps
30000
40000
50 kbps
50000
UMTS/HSDPA does not scale well for high average bitrates Investment costs of WiMAX networks are expected to be lower above ~10 kbit/s per subscriber With similar costs for basestations, HSDPA is burdened by its UMTS siblings in the access and core network The WiMAX network is legacy-free and optimized for high bandwidth
5 - Mobile WiMAX Introduction (Max Riegel)
Profit Center
Control
Profit Enabler
Radio Access
Cost Center
Commercial operations tend to focus onto increasing their profits Increasing the customer base is one dimension of increasing profits, introduction of new services is the other dimension. The profits acchievable by new services depend on the relation between customer value (price) and the cost for realizing the service Management will allways focus on high value while keeping the expenses for the realization small
Best example: SMS
The radio access network is adding most to the cost, hardly anything to the profits.
Bandwidth is considered as a scarce resource Results in traffic growth of ~7%/year
ASP
ASP
ASP
ASP
A WiMAX access network allows to extend the DSL business serving customers without appropriate wires, and additionally also...
addressing customers looking for a more easy-to-use solution, providing portable and mobile access
Level of Mobility
LTE LTE
cellular
2G/3G
IEEE 802.16e
IEEE802
nomadic
...
...
...
...
IEEE 802.11 IEEE IEEE 802.16a 802.16a IEEE IEEE 802.16 802.16
low high
stationary
mobile topics
Bandwidth
Fixed wireless broadband Air Interface: 10 66 GHz 802.16 Amendment Fixed wireless broadband MAC & PHY: 2 - 11 GHz 802.16 Rev PAR for 802.16, 802.16a Fixed wireless broadband System Profiles, Errata for 2 - 11 GHz
(Formerly 802.16REVd)
802.16a
(2003)
802.16e
Harmonization
Mobile WiMAX
802.16e-2005
(Dec 2005)
802.16 Amendment for Combined Fixed and Mobile wireless broadband at vehicular speeds in Licensed bands from 2-6 GHz
Feeding
Completed Spectrum Channel Conditions Bit Rate Modulation Mobility Channel Bandwidths Typical Cell
December 2001 10 - 66 GHz Line of Sight Only 32 134 Mbps in 28MHz channel bandwidth Single Carrier QPSK, 16QAM, 64QAM Fixed 20, 25 and 28 MHz 2-5 km
FWA
January 2003 < 11 GHz Non Line of Sight Up to 75 Mbps in 20MHz channel bandwidth OFDM 256 sub-carriers QPSK, 16QAM, 64QAM Fixed Scalable 1.5 to 20 MHz 7 to 10 km, up to 50 km
Cellular
December 05 < 6 GHz Non Line of Sight Up to 15 Mbps in 5MHz channel bandwidth 1x Scalable OFDMA QPSK, 16QAM, 64QAM Portable Mobile (up to 120 km/h) Scalable 1,25 to 20 MHz 1-5 km
Mandatory features in 802.16 are mandatory in WiMAX, if included Optional features in 802.16 may be optional, mandatory or not included
Fixed WiMAX OFDM-256
14
Internet
Content is not tied to a particular Core but on the Internet Split between Application Service Provider and Network Service Provider Often Access is operated as independent business Network Access Provider does not like to deal with the consumer but concentrates on establishment and operation of its network infrastructure Facilitates shared access network by multiple service providers, which is beneficial for economy of scale and ROI.
15 - Mobile WiMAX Introduction (Max Riegel)
Legacy Architecture
MNO A
Services
Core
Core
CSN
CSN
CSN
R5 RAN RAN R2 R1 R3
ASN ASN
NSP
R4
NAP
Subscriber
Subscriber
Subscriber
Subscriber
Subscriber
Visited NSP
Home NSP
R2
R1
SS/ MS
R3
ASN
R5
CSN
CSN
R4
Another ASN
NAP
Subscriber Station Mobile subscriber station Access Serving Network Connectivity Serving Network
vNSP
hNSP
BS
MS R1
R3
AAA proxy
CSN
AAA PF
CSN R5
PF
R4
HA BS R6 ASN ASN GW BS R6
R3 Internet Internet
The NRM defines also a logical decomposition inside the ASN (BS, ASN-GW) Most implementations follow this logical structure
19 - Mobile WiMAX Introduction (Max Riegel)
ASN
R6
RRM-S Pag. & Loc Authorization Authentication QoS Ctrl Mob Mgmt
CSN
R3
Pag. & Loc Authorization Authentication QoS Ctrl Mob Mgmt
DataPath
Encaps
DataPath
Encaps
DataPath
NRM Reference Points represent a bundle of protocols between peer entities Similar to a real IP network interface The implementation of a particular protocols over a reference point is optional If a particular protocol is present, it must conform to the WiMAX specification
20 - Mobile WiMAX Introduction (Max Riegel)
Internet
IP 802.16 IP GRE 802.16 IP LNK MIP GRE IP IP IP LNK LNK MIP IP IP IP LNK LNK IP LNK
Internet
MIP IP 802.16 MIP MIP IP IP IP LNK LNK
IP LNK
23
AS
BGCF
Cx Mn MGCF Mg Cx S- CSCF
Mw
LRF
HSS
E-CSCF
Mi
IM -MGW
SLF MRFP
CSN Rx
PCRF A-PCEF HA C-PCEF R3
Mp
MRFC P -CSCF
ASN
R1 Gm
Gm
MS
vCSN
hCSN
R4
ASN2
Serving SFA Accounting Agent Anchor DPF/FA R3 (IMS Sig)
R3 (IMS Bearer)
(IM S
Si g)
HA
* Other IMS Entities (I-CSCF, S-CSCF, HSS, BGCF, MGCF, MGW, etc.)not shown for brevity
27
Emergency Services support in WiMAX will likely use IMS based VoIP
Visited NSP R2 Home NSP
R2
E - CSCF
E - CSCF
R1 SS/ MS
LF
R3 ASN
Location Server
R5
Location Server
CSN
IMS Core / VOIP Server
CSN
IMS Core / VOIP Server
Location Function
R4
NAP