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Transcript of EDCH
Enhanced Uplink Dedicated Channel (EDCH)Enhanced Uplink Dedicated Channel (EDCH)
High Speed Uplink Packet Access (HSUPA)High Speed Uplink Packet Access (HSUPA)
EDCH Background & BasicsChannels/ UTRAN ArchitecturePrinciples: Hybrid ARQ, scheduling, soft handoverRRM: Handover, Resource AllocationPerformance Results
Background
E DCH is a Rel 6 feature with following targetsE-DCH is a Rel-6 feature with following targetsImprove coverage and throughput, and reduce delay of the uplink dedicated transport channelsPriority given to services such as streaming, interactive and background services, conversational (e.g. VoIP) also to be consideredFull mobility support with optimizing for low/ medium speedSimple implementationSpecial focus on co-working with HSDPA
Standardization started in September 2002Study item completed in February 2004Stage II/ III started in September/ December 2004Release 6 frozen in December 2005/ March 2006Various improvements have been introduced in Rel-7 & Rel-8p
UMTS Networks 2Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
E-DCH Basics
E DCH is a modification of DCH Not a shared channel such asE-DCH is a modification of DCH – Not a shared channel, such as HSDPA in the downlink !!
PHY taken from R99PHY taken from R99Turbo coding and BPSK modulationPower Control
/10 msec/ 2 msec TTISpreading on separate OVSF code, i.e. code mux with existing PHY channels
MAC similarities to HSDPAFast schedulingStop and Wait HARQ: but synchronous
New principlesp pIntra Node B “softer” and Inter Node B “soft” HO should be supported for the E-DCH with HARQScheduling distributed between UE and NodeB
UMTS Networks 3Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
E-DCH Scheduling
UE NodeB
Scheduling information
DATA
UE detects data in buffer
Scheduling informationScheduler takes UE for scheduling
Scheduling grant
UE sends scheduling information
MAC e signaling
Scheduling grant
Scheduling grantMAC-e signaling
On E-DPCCH: “happy bit”
NodeB allocates the resources
Ab l t / l ti h d li t
Scheduling information
Scheduling grant
Absolute/ relative scheduling grants
Algorithms left open from standards
Depending on the received grants, UE decides on transmission
ll d b f lMaintains allocated resources by means of internal serving grants
Selects at each TTI amount of E-DCH data to transmit
Algorithms fully specified by UMTS standard
UMTS Networks 4Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
E-DCH Scheduling Principle
E-DCH scheduler constraintUL Load UL Load Keep UL load within the limitScheduler controls:
E-DCH load portion from non-serving users of other cellsS i
UL Load target
UE #m
serving users of other cellsE-DCH resources from each serving user of own cell
Non E-DCH load portion
Serving E-DCH users
UE #1 Non E DCH load portionDCH, RACH, HS-DPCCHMay include non-scheduled E-DCHControlled by legacy load control,
Non-serving E-DCH users
y g y ,e.g. Admission/ Congestion control
Notes: E-DCH users transmit
h l
Non E-DCH
asynchronouslyEach UE owns whole code tree
UMTS Networks 5Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
UMTS Channels with E-DCH
C ll 1 C ll 2Cell 1
UEUE
Cell 2= Serving
E-DCH cell
R99 DCH (in SHO)UL/DL signalling (DCCH)UL/DL CS voice/ data
Rel-6 E-DCH (in SHO)UL PS service (DTCH) UL/DL CS voice/ data
Rel-5 HS-DSCH (not shown)DL PS service (DTCH)DL signalling (Rel 6 DCCH)
UL PS service (DTCH)UL Signalling (DCCH)
UMTS Networks 6Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
DL signalling (Rel-6, DCCH)
E-DCH Channels
E DPDCHE-DPDCHCarries the data trafficVariable SF = 256 … 2UE supports up to 4 E-DPDCH
E-DPCCHContains the configuration as used on E-DPDCHContains the configuration as used on E DPDCHFixed SF = 256
E RGCH/ E HICHE-RGCH/ E-HICHE-HICH carries the HARQ acknowledgementsE-RGCH carries the relative scheduling grantsg gFixed SF = 128Up to 40 users multiplexed onto the same channel by using specific signaturessignatures
E-AGCHCarries the absolute scheduling grants
d
UMTS Networks 7Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Fixed SF = 256
Timing Relation (UL)
CFN+1 Downlink DPCH CFN
Uplink DPCCH CFN
15 × Tslot (10 msec)0.4 × Tslot (1024 chips) p
E-DPDCH/E DPCCH
10 msec
±148chips
10 msec TTI
Subframe #0 E-DPCCH
3 × Tslot (2 msec)
Subframe #1 Subframe #2 Subframe #3 Subframe #4 2msec TTI
E-DPDCH/ E-DPCCH time-aligned to UL DPCCH
UMTS Networks 8Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
HSUPA UE Categories
E-DCH Category
Max. num.Codes
Min SF EDCH TTI Maximum MAC-e TB size
Theoretical maximum PHY data rate (Mbit/s)
Category 1 1 SF4 10 msec 7110 0.71
Category 2 2 SF4 10 msec/2 msec
14484/2798
1.45/1.4
Category 3 2 SF4 10 msec 14484 1.45
Category 4 2 SF2 10 msec/2 msec
20000/5772
2.0/2 892 msec 5772 2.89
Category 5 2 SF2 10 msec 20000 2.0
Category 6 4 SF2 10 msec/ 20000/ 2 0/Category 6 4 SF2 10 msec/2 msec
20000/11484
2.0/5.74
Category 7(Rel 7)
4 SF2 10 msec/2 msec
20000/22996
2.0/11 5
When 4 codes are transmitted, 2 codes are transmitted with SF2 and 2 with SF4
(Rel.7) 2 msec 22996 11.5
UMTS Networks 9Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
,UE Category 7 supports 16QAM
E-DCH UTRAN Architecture
RRC PDCPSRNCEvolution from Rel-5
RLC
Logical Channels BCCHDCCHDTCH
• E-DCH functionality is intended for transport of dedicated logical channels (DTCH/ DCCH)
MAC-d
DCH
channels (DTCH/ DCCH)
MAC-d flows
MAC-es
MAC-d flows
E-DCH in Rel-6
• Additions in RRC to
MAC-c/sh
CRNC Upper phy
o M
AC
-c/s
hconfigure E-DCH
• RLC unchanged(UM & AM)
MAC-b
NodeBMAC-hs
w/o
MAC-e
• New MAC-es entity with link to MAC-d
• New MAC-e entity located
Transport Channels BCHDSCHFACHHS-DSCHEDCH
in the Node B
• MAC-e entities from multiple NodeB may serve
UE ( ft HO)
UMTS Networks 10Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
one UE (soft HO)
MAC-e/es in UE
MAC-e/es FunctionsPriority handling
Per logical channelMAC-es/e
MAC – Control To MAC-d
MultiplexingE-TFC Selection
MultiplexingMAC-d flow concept
HARQ
MultiplexingE-TFC Selection
Mux of data from multiple MAC-d flows into single MAC-e PDU
SchedulingMaintain scheduling grant
Associated Uplink Signalling:
Associated Scheduling Downlink Signalling
(E-AGCH / E-RGCH(s))
Associated ACK/NACK UL data
(E-DPDCH)
E-TFC selectionHARQ handling
E-TFCI, RSN, happy bit(E-DPCCH)
signaling (E-HICH)
UMTS Networks 11Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Cf. 25.309
MAC-e in NodeB
MAC-e FunctionsPer user
HARQ handling:
MAC-d Flows
ACK/ NACK generationDe-multiplexingE DCH t lMAC Control
UE #2
UE #N
UE #1 E-DCH control:Rx/ Tx control signals
MAC – Control
De-multiplexing
E-DCH Control
E-DCH Scheduling
UE #1
E-DCH scheduling for all users
Assign resources
HARQ entity
Assign resources (scheduling grants)
Iub overload control
MAC-e
E-DCH
UMTS Networks 12Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Cf. 25.309Associated Downlink Signalling
Associated Uplink
Signalling Common RG
MAC-es in SRNC
To MAC-d
MAC-es
MAC C t l
MAC-es Functions
Queue distribution
MAC – Control
Disassembly
Disassembly
Reordering/
Combining
Disassembly
Reordering/ Combining
Reordering/ Combining
Reordering
Per logical channel
Reordering Queue Distribution
Reordering Queue Distribution
Co b g Co b g Co b g
In-sequence delivery
Macro-diversity combining:
MAC-d flow #1 MAC-d flow #n
gframe selection
Disassembly
From From
Disassembly
UMTS Networks 13Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
MAC-e in NodeB #1
MAC-e in NodeB #k Cf. 25.309
Data Flow through Layer 2
RLCDATAHeader
DATA
RLC PDU:
MAC-d PDU:
RLC
MAC-d
DDI: Data Description Indicator (6bit)
MAC-d PDU sizeDATAMAC d PDU:
MAC-e/es TSN DATA DATA MAC-es PDU:
Log. Channel ID
Mac-d flow ID
N N b f MAC d PDU
DDI N Padding DDI N DATADDI DATA
N: Number of MAC-d PDUs (6bit)
TSN: Transmission Sequence
MAC-es PDU MAC-e header
(Opt)
MAC-e PDU:
Number (6bit)
DATAPHY
UMTS Networks 14Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Hybrid ARQ Operation
N-channel parallel HARQ with stop-and-wait protocolNumber of HARQ processes N to allow uninterrupted E-DCH transmission
10 msec TTI: 42 msec TTI: 8
Synchronous retransmissionsyRetransmission of a MAC-e PDU follows its previous HARQ (re)transmission after N TTI = 1 RTTIncremental Redundancy via rate matching
Max. # HARQ retransmissions specified in HARQ profile
ACK
ACK
ACK
NACK
NACK
New Tx 2 New Tx 3 New Tx 4 Re-Tx 1 New Tx 2 Re-Tx 3 New Tx 4 Re-Tx 1 Re-Tx 2New Tx 1
NACK
UMTS Networks 15Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
NACKNACK
E-DCH UE Scheduling
UE maintains internal serving grant SGUE maintains internal serving grant SGSG are quantized Maximum E-DPDCH/ DPCCH power ratio (TPR), which are defined by 3GPPReception of absolute grant: SG = AG
No transmission: SG = “Zero_Grant”Reception of relative grants: increment/ decrement index of SG in the SG p g /tableAG and RG from serving RLS can be activated for specific HARQ processes for 2msec TTIsecUE selects E-TFC at each TTIAllocates the E-TFC according to the given restrictions
S i t SGServing grant SGUE transmit power
Provides priority between the different logical channels
UMTS Networks 16Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Scheduling Grant Table
Index Scheduled Grant
37 (168/15)2*6
Scheduling grants are max. E-DPDCH/ DPCCH power ratio (TPR –t ffi t il t ti )37 (168/15)2*6
36 (150/15)2*6 35 (168/15)2*4 34 (150/15)2*4 33 (134/15)2*4 32 (119/15)2*4
traffic to pilot ratio)Power Ratio is related to UE data rate
32 (119/15)2*431 (150/15)2*2 30 (95/15)2*4 29 (168/15)2
•
Relative GrantsSG moves up/ down when RG = UP/ DOWN
• •
14 (30/15)2 13 (27/15)2 12 (24/15)2 11 (21/15)2
Absolute GrantsSG jumps to entry for AG
11 (21/15)10 (19/15)2 9 (17/15)2 8 (15/15)2 7 (13/15)2 6 (12/15)2
2 reserved values for ZERO_GRANT/ INACTIVE
6 (12/15)2
5 (11/15)2 4 (9/15)2 3 (8/15)2 2 (7/15)2
2
UMTS Networks 17Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
1 (6/15)2
0 (5/15)2
Rate Scheduling Time Scheduling
E-DCH Scheduling Options
Rate Scheduling Time Schedulingat
e
ate
ra ra
UE2
UE1UE2 UE3 UE1
UE1
UE3
time time
UEs are continuously activeData rate is incremental increased/ decreased by relative scheduling grantsN h b t UE i d
UEs are switched on/ off by absolute scheduling grantsUEs should be in synchL d i ti i ht b lNo synch between UEs required
Load variations can be kept lowFor low to medium data rates
Load variations might be large(verry) high data rates
UMTS Networks 18Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Timing Relation for Scheduling Grants
Scheduling
E-RGCHE-AGCH
HARQ process number
decision
Load estimation, etc
1 2 3 4 1 2 3 E-DCH
• AG applied to this HARQ process
• RG interpreted relative to the previous TTI in
AG and RG associated with specific uplink E-DCH TTI, i.e. specific HARQ processAssociation based on the timing of the E AGCH and E RGCH
this HARQ process.
Association based on the timing of the E-AGCH and E-RGCH.Timing is tight enough that this relationship is un-ambiguous.Example: 10msec TTI
UMTS Networks 19Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Scheduling Information
Happy bit signalingHappy bit signalingOne bit status flag send on E-DPCCH at each TTICriterion for happy bitCriterion for happy bit
Set to “unhappy” if UE is able to send more data than given with existing serving grantO h i “h ”Otherwise set to “happy”
Scheduling Information ReportingContent of MAC-e reportContent of MAC e report
Provides more detailed information (log. channel, buffer status, UE power headroom)Will be sent less frequently (e.g. every 100 msec)
Parameters adjusted by RRC (e.g. reporting intervals, channels to report)report)
UMTS Networks 20Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
HSUPA Resource Allocation
Node B resources-decoding capability
Cell resources-Admissible uplink noise rise/load
Capabilities of the UEs-MAC-e PDU size limits
decoding capability-Iub bandwidth capacity
rise/load-CAC via RNC-Number AGCH/RGCH
QoS parameters-Throughput bounds
E-DCH Radio Resource Management “E-RRM”-Keep uplink load within the limit-Control E-DCH load portion from non-serving users of other cells
MAC e PDU size limits-SF limits
Throughput bounds
serving users of other cells-Control E-DCH resources from each serving user of own cell-Satisfy QoS/ GoS requirements (Ranking PF/SW)-Maximize HSUPA cell throughput-Maximize HSUPA cell throughput
Task: assigns Serving Grants (relative or absolute grants) in terms of a power offset to the current DPCCH power to the UEs in order to control the
maximum data ratemaximum data rate
Finally, the UE decides by itself on the used power ratio and the transport
UMTS Networks 21Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
block size taking into account the restrictions sent by Node B
NodeB Scheduling Principle
E-DCH scheduler constraintUL Load UL LoadKeep UL load within the limit
Scheduler controls:
E DCH load portion of non servingS i
UL Load target
UE #m
E-DCH load portion of non-serving users from other cells
E-DCH resources of each serving user of own cell
Serving E-DCH users
UE #1of own cell
Principles:
Rate vs. time scheduling
Non-serving E-DCH users
Dedicated control for serving users
Common control for non-serving users
Non E-DCH
Note: Scheduler cannot exploit fast fading !
UMTS Networks 22Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Non-scheduled Mode
Configured by the SRNCConfigured by the SRNC
UE is allowed to send E-DCH data at any time
Signaling overhead and scheduling delay are minimizedSignaling overhead and scheduling delay are minimized
Support of QoS traffic on E-DCH, e.g. VoIP & SRB
Characteristics
Resource given by SRNC: Non-scheduled Grant = max. # of bits that can be included in a MAC-e PDU
UTRAN can reserve HARQ processes for non-scheduled transmissionUTRAN can reserve HARQ processes for non-scheduled transmission
Non-scheduled transmissions defined per MAC-d flowMultiple non-scheduled MAC-d flows may be configured in parallel
One specific non-scheduled MAC-d flow can only transmit up to the non-scheduled grant configured for that MAC-d flow
Scheduled grants will be considered on top of non-scheduled Sc edu ed g a ts be co s de ed o top o o sc edu edtransmissions
Scheduled logical channels cannot use non-scheduled grant
Non scheduled logical channels cannot transmit data using Scheduling Grant
UMTS Networks 23Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Non-scheduled logical channels cannot transmit data using Scheduling Grant
E-DCH Operation in Soft Handover
scheduling grantscheduling grant
UEUE
scheduling grantHARQ ACK/ NACK
scheduling grantHARQ ACK/ NACK
Macro diversity operation on multiple NodeBs
NodeB 1NodeB 1 NodeB 2NodeB 2
Macro-diversity operation on multiple NodeBsSofter handover combining in the same NodeBSoft handover combining in RNC (part of MAC-es)
I d d MAC i i b h N d BIndependent MAC-e processing in both NodeBsHARQ handling rule: if at least one NodeB tells ACK, then ACKScheduling rule: relative grants “DOWN” from any NodeB have
d
UMTS Networks 24Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
precedence
Mobility Handling
The UE uses soft handover for associated DCH as well as for E DCHThe UE uses soft handover for associated DCH as well as for E-DCHUsing existing triggers and procedures for the active set update (events 1A, 1B, 1C)E-DCH active set is equal or smaller than DCH active set
New event 1J: non-active E-DCH link becomes better than active one
The UE receives AG on E-AGCH from only one cell out of the E-DCHThe UE receives AG on E AGCH from only one cell out of the E DCH active set (serving E-DCH cell)
Rel-6: E-DCH and HSDPA serving cell must be the sameH d H d i h f i E DCH llHard Handover, i.e. change of serving E-DCH cellUsing RRC procedures, which maybe triggered by event 1D
Could be also combined with Active Set Update
UMTS Networks 25Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Mobility Procedures
SRNC SRNC
MAC-es MAC-es
MAC-e MAC-e MAC-e MAC-e
NodeB NodeB NodeB NodeB
S i
s t
Serving E-DCH radio link
Serving E-DCH radio link
Inter-Node B serving E-DCH cell change within E-DCH active setNote: MAC e still established in both NodeBs !
UMTS Networks 26Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Note: MAC-e still established in both NodeBs !
E-DCH State Transitions
Reuse of the DCH state transition frameworkReuse of the DCH state transition frameworkMove to Cell_FACH in case of decreased traffic amountMove back from Cell_FACH in case of increased traffic amountTransition to URA_PCH in case of inactivityPreferred combination: E-DCH/ HSDPA
Transition to DCHTransition to DCHIn case of handover to cells not supporting E-DCHService specific triggers
Cell DCHHSDPA/ EDCH
Cell DCHHSDPA/ DCHHSDPA/ EDCH HSDPA/ DCH
Cell FACH,URA_PCH, …
Cell DCHDCH/ DCH
UMTS Networks 27Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
IDLE
E-DCH RRM Principle
E-DCH resources controlled byE-DCH resources controlled byUL load target
Derived from RTWP target/ reference background noiseUL Load UL Load reference background noiseNodeB internal load target
E-DCH non-serving load portionEquivalent to target non-S i
UL Load target
Equivalent to target nonserving E-DCH to total E-DCH power ratio
NodeB schedules E-DCH users di t RNC tti
Serving E-DCH users
according to RNC settingsPriority for non E-DCH traffic
RNC still controls non E-DCH load portion
Non-serving E-DCH users
portion By means of e.g. admission/ congestion controlBased on either of the following
Non E-DCHNon E-DCH load portion
Based on either of the followingTo be derived from RTWP ORMeasure of non-EDCH load
UMTS Networks 28Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
E-DCH Performance & Capacity
E DCH offers improved throughput due toE-DCH offers improved throughput due toHARQ gainFaster scheduling with tighter UL load controlFaster scheduling with tighter UL load control
The additional PHY channels consume resourcesUL load: DPCCH, E-DPCCHDL power/ codes: E-HICH/ E-RGCH, E-AGCH
UMTS Networks 29Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
User Throughput vs. Aggregate Cell Throughput
36 cells network
1000
1200
10ms TTI, unlimited CE dec. rate 2ms TTI, next release 36 cells network
UMTS composite channel model
FTP t ffi d l (2 Mb t
#UEs/cell1
2
800
1000
put [
kbps
]
FTP traffic model (2 Mbyte upload, 30 seconds thinking time)
M i ll th h t
3
4
400
600
Use
r Thr
ough Maximum cell throughput
reached for about 7…8 UEs per cell
Cell throughput drops if #UEs
5678
0
200
200 400 600 800 1000 1200 1400 1600
Cell throughput drops if #UEs increases further since the associated signaling channel consume UL resources too
89
10
200 400 600 800 1000 1200 1400 1600
Aggregated Cell Throughput [kbps]
UMTS Networks 30Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Single User Performance
Average user throughput (RLC layer) for different 2ms, 1Tx 10ms, 1Tx ( C aye ) o d e echannel profiles
1 UE in the network
1 target HARQ transmission3000
3500
, ,
g Q
For AWGN channel conditions:
10ms TTI: up to 1.7 Mbps 2000
2500
ghpu
t [kb
ps]
p p(near theoretical limit of 1.88 Mbps)
2ms TTI: up to 3 Mbps (b l th ti l li it 5 44
1000
1500
age
User
Thr
ou
(below theoretical limit 5.44 Mbps)
E.g. due to restrictions from RLC layer (window 0
500
Aver
a
y (size, PDU size)
0AWGN PedA3 PedA30 VehA30 VehA120
Scenario
UMTS Networks 31Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
E-DCH Summary
New uplink transmission conceptNew uplink transmission conceptOptimized for interactive, background and streaming, support of conversationalFull support of mobility with optimizing for low/ medium speed
Improved PHY approachNew UL transport channel: E-DCHpAdditional signalling channels to support HARQ and E-DCH scheduling
MAC-e/es entity located in NodeB/ SRNCDistributed E DCH scheduling between UE and NodeBDistributed E-DCH scheduling between UE and NodeBE-DCH supports soft/ softer HO
Radio Resource Control procedures similar to HSDPAE-DCH Resource Management
Cumulated resources managed by Controlling-RNCRe-use of principles for DCH control (handover state transition)Re use of principles for DCH control (handover, state transition)
Significant improved performance
UMTS Networks 32Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
References
PapersPapers
A. Ghosh et al: “Overview of Enhanced Uplink for 3GPP W-CDMA,” Proc. IEEE VTC ’04/ Milan, vol. 4, pp. 2261–2265
H. Holma et al: “HSDPA/ HSUPA for UMTS,” Wiley 2006
Standards
TS 25 xxx series: RAN AspectsTS 25.xxx series: RAN Aspects
TR 25.896: “Feasibility Study for Enhanced Uplink for UTRA FDD”
TR 25.808: “FDD Enhanced Uplink; Physical Layer Aspects”p ; y y p
TR 25.309/ 25.319 (Rel.7 onwards): “(FDD) Enhanced Uplink: Overall Description (Stage 2)”
UMTS Networks 33Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
Abbreviations
ACK (positive) AcknowledgementAG Absolute GrantAM Acknowledged (RLC) ModeAMC Adaptive Modulation & Coding
Mux MultiplexingNACK Negative AcknowledgementNBAP NodeB Application PartOVSF Orthogonal Variable SF (code)AMC Adaptive Modulation & Coding
BO Buffer OccupancyCAC Call Admission ControlCDMA Code Division Multiple AccessDBC Dynamic Bearer Control
OVSF Orthogonal Variable SF (code)PDU Protocol Data UnitPHY Physical LayerPO Power OffsetQoS Quality of ServiceDBC Dynamic Bearer Control
DCH Dedicated ChannelDDI Data Description IndicatorDPCCH Dedicated Physical Control ChannelE-AGCH E-DCH Absolute Grant Channel
Qo Qua y oQPSK Quadrature Phase Shift KeyingRB Radio BearerRG Relative GrantRL Radio LinkE AGCH E DCH Absolute Grant Channel
E-DCH Enhanced (uplink) Dedicated ChannelE-HICH E-DCH HARQ Acknowledgement Indicator ChannelE-RGCH E-DCH Relative Grant Channel
RLC Radio Link ControlRLS Radio Link SetRRC Radio Resource ControlRRM Radio Resource Management
E-TFC E-DCH Transport Format CombinationFDD Frequency Division DuplexFEC Forward Error CorrectionFIFO First In First OutFP F i P t l
RV Redundancy VersionSDU Service Data UnitSF Spreading FactorSG Serving Grant
FP Framing ProtocolGoS Grade of ServiceHARQ Hybrid Automatic Repeat RequestIE Information ElementMAC d dedicated Medium Access Control
SI Scheduling InformationTNL Transport Network LayerTPR Traffic to Pilot RatioTTI Transmission Time IntervalUM U k l d d (RLC) M d
UMTS Networks 34Andreas Mitschele-Thiel, Jens Mückenheim WS 2008
MAC-d dedicated Medium Access ControlMAC-e/es E-DCH Medium Access Control
UM Unacknowledged (RLC) Mode