APN Access Point Name, referring to a GGSN and an external network.
bearer a physical channel between the UE and the BSR
BSR base station router
not a standard term, really; often means:
- node B == antenna + controller
- RNC
but might also include Cn
BTS the CDMA name for a basestation
Cn Core network = SGSN+GGSN
DCH data channel
DTCH data tranmission channel
DCCH data control channel
ECP is a complex full of 3B21 Unix machines and other things
GERAN GSM/EDGE Radio Access Network
GGSN Gateway GPRS support node
A specialized router that functions as the gateway between the
GPRS network and the external networks, e.g., Internet. It
also gathers charging information about the connections.
GPRS General Packet radio service
- GTP IP/PPP tunnel
- ?terminates at SGSN
GTP GPRS Tunneling Protocol
GTP-U General Tunneling Protocol - User Plane
HARQ Hybrid ARQ (part of HSDPA)
downstream packets ack'd 6ms later
MAC media access control
MSC Mobile Switching Center
- currently a #5E
- for voice
MT Mobile Termination. (cellphone)
NodeB the UMTS name for a basestation
OMP hardware at the ECP?
PDCP Packet Data Convergence Protocol (PDCP)
- van jacobson header compression
- RFC2507
PDP Packet Data Protocol
PDP Context connection between the UE and the GGSN
A primary PDP Context and any secondaries define a
point-to-point link. A primary can be deleted while
keeping the link between the UE and the GGSN, as long
as there are secondaries for the same IP address.
PDSN packet data service network
PLMN Public Land Mobile Network
- the same as UTRAN just to confuse us
pocketUMTS merged basestation and RNC concept
RNC radio network controller
handles up to 180 basestations over T1 lines with RLC frames (bundled up)
RLC radio link control (called RLP in CDMA)
- seg/reass of IP packets
- perhaps ACK and retransmission
RRC Radio Resource Control
- broadcast
- paging
- signaling channels
- radio bearers (layer 2)
- logical transport & physical channels
RCS (radio control server) controls multiple basestations (CDMA equiv of UMTS RNC)
SGSN Serving GPRS support node
The SGSN's main functions include authentication,
authorization, mobility management, and collection of billing
information. The SGSN is connected to the SS7 network and
through that, to the Home Location Register (HLR), so that it
can perform user profile handling, authentication, and
authorization.
SM session management
- manage PDP contexts
- between BSR and UE
TCTF ?
TE Terminal Equipment. (laptop attached through a 3GPP handset)
UE User Equipment (TE + MT + USIM)
USIM Universal Subscriber Identity Module (a card inserted in cellphone)
UTRA an air interface standard somewhat like CDMA2000
UTRAN UMTS Terrestrial Radio Access Network
- RNC+Node B's
CDMA 3G1x
BTS --- aggr router --- MSC --- PSTN
CDMA 1xEVDO
BTS --- aggr router --- RNC --- IP net --- PDSN --- MPLS net
UMTS
NodeB --- aggr router --- RNC --- SGSN --- IP net --- GGSN --- MPLS net
------
| |
| App |- - - - - - - - - - - - - - - - - - - - - - - - -(to app peer)
| |
|------| -------------
| IP |- - - - - - - - - - - - - - - - - - - - - - -| IP |->
| v4/6 | | v4/6 |
|------| ------------- ------------- |------ |
| | | \ Relay / | | \ Relay / | | | |
| | | \ / | | \ / | | | |
| | | \ / | | \ / | | | |
| PDCP |- - -| PDCP\ /GTP_U|- - -|GTP_U\ /GTP_U|- - -|GTP_U | |
| | | | | | | | | | |
|------| |------|------| |------|------| |------| |
| | | | UDP |- - -| UDP | UDP |- - -| UDP | |
| | | |------| |------|------| |------| |
| RLC |- - -| RLC | IP |- - -| IP | IP |- - -| IP | |
| | | | v4/6 | | v4/6 | v4/6 | |v4/6 | |
|------| |------|------| |------|------| |------|------|
| MAC | | MAC | AAL5 |- - -| AAL5 | L2 |- - -| L2 | L2 |
|------| |------|------| |------|------| |------|------|
| L1 |- - -| L1 | ATM |- - -| ATM | L1 |- - -| L1 | L1 |
------ ------------- ------------- -------------
UE UTRAN SGSN GGSN
(handset)
rfc3314 Figure 2: GPRS Protocol Stacks (same for UMTS)
------
| |
| App. |- - - - - - - - - - - - - - - - - - - - - - (to app peer)
| |
|------|
| |
| IP |- - - - - - - - - - - - - - - - - - - - - - (to GGSN)
| v4/6 |
| | | |
|------| |-------------|
| | | \ Relay / |
| | | \ / |
| | | \ / |
| | | \ / PDCP|- - - (to UTRAN)
| | | | |
| PPP |- - -| PPP |------|
| | | | RLC |- - - (to UTRAN)
| | | |------|
| | | | MAC |
|------| |------|------|
| L1a |- - -| L1a | L1b |- - - (to UTRAN)
------ -------------
TE MT
(laptop) (handset)
Figure 3: Laptop Attached to 3GPP Handset
-----local measurements-----
GPRS (2.5G)
fundamental channel 40kb/s
20 to 40 kb/s Oct 2002
800 to 1500 ms RTT
T-Mobile (aka Voicestream)
Option card
CDMA2000 1X (3G)
fundamental channel 153kb/s
20 to 40 kb/s Oct 2002
400 to 600 ms RTT
Verizon
Sierra Wireless AirCard 555
EV-DO
field estimates 120ms ping RTT
30 for downlink, 90 for uplink (of which 60 is transmission delay)
-----product and technology names-----
IS-95 existing widely-deployed CDMA
Lucent Flexent Modcell
CDMA2000
1x voice + 153.6kb/s data downlink (raw max)
EV-DO data-only 2.4Mb/s
has multiprocessor HDR-C box between BS and PDSN <ganeshs>
Release 20 went GA 10feb03 for NAR
deployed by VzW, Sprint
EV-DV voice + data 3.84Mb/s, backwards compatible with 1x
Lucent OneBTS
UMTS universal mobile telecom system
R99
R5
R6
HSDPA add-on for R99-r6, high speed data packet access (high-speed down, standard up)
deployed by Cingular, NTT DoCoMo
Lucent ExCU/PE Swinden's board
GPRS/EDGE
deployed by Cingular, T-Mobile
IDEN
325ms latency, 20kb/s throughput
deployed by Nextel
FLASH-OFDM (Flarion) Fast Low-latency Access with Seamless Handoff and Orthogonal Frequency Division Multiplexing
claims 50ms latency, 1.5Mb/s throughput in 1.25MHz channel
WiMAX (IEEE 802.16)
802.16e adds mobility
802.20 (Flarion and ArrayComm)
EDBS Enhanced Distributed BaseStation (CDMA, distributed channel cards)
card types:
controller URC "universal radio controller"
(made up of a UMC and a LIU)
channel card
UCU
CCU
CMU channel card "CDMA modem unit"
radio
MCR multi-channel radio sits between channel card and amplifier
CFM fiber module
other jargon used by the USL OneBTS crowd:
BSC base station controller
BTS base transceiver station
CSU channel service unit
DDM device driver message
LCID logical channel ID
LIU line interface unit
LRT LSN route table
LSN logical shelf network
RMT remote maintenance terminal
TGC trunk group controller
TNA target node address
USL uniform services layer
VIM voice interface module
high-speed downlink packet access (HSDPA) and enhanced uplink data channel (EUDCH).
North American market as of Mar 2004, million subscribers:
48 Cingular (incl ATT W)
42 Verizon Wireless
38 Sprint (incl Nextel)
17 T-Mobile
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