WCDMA Resource Congestion Introduction
#0 Content Overview congestion types
Reason and solution for congsetion
Congestion statistic
Discussion # Content Overview congestion types
Reason and solution for congsetion
Congestion statistic
Discussion # Congetion types overviewCE Congestion
CODE Congestion
POWER Congestion
IuB Congestion # CE resources are a type of NodeB hard resource.
The number of CEs supported by a NodeB indicates the channel
demodulation capabilities of the NodeB. CE resource Overview
The more CEs a NodeB supports, the morepowerful the channel
demodulation and service processing capabilities.BoardNumber of
CellsUL CE NumberDL CE
NumberWBBPa3128256WBBPb136464WBBPb23128128WBBPb36256256WBBPb46384384WBBPd16192192WBBPd26384384WBBPd36256256
#Code resource Overview
#Code resource Overview
#Code resource Overview
#Power resource Overview
In the WCDMA system, all the cells share the same frequency,
which is beneficial to improve the system capacity. However,
co-frequency multiplexing causes interference between users. All
users in the WCDMA system use the same band. All the users are
different by modulating the respective signal to the code sequences
that are mutually orthogonal. Therefore, the receiving signal is
the sum of all user signals and the channel noise. #Power resource
OverviewUplink powerIf the uplink interference of the BTS reaches a
certain extent, the terminal will be impossible to meet the
requirements of demodulation quality through improving the
transmitting power, and the terminal will be impossible for access
or service. Downlink powerWhen the downlink transmitting power of
the BTS reaches the load threshold, no redundant power is available
for allocation. This will make the terminal impossible for access
or service. #IuB resource OverviewFactors to be considered when
estimating the interface capacity: Frame coding efficiency. Through
segmentation and encapsulation of the application data at each
layer, the data quantity at the bottom layer will be increased to
different extents compared with the application data at the upper
layersTraffic. More users will generate more data
trafficMaintenance efficiency. Certain bandwidth is required in the
background maintenance for BTS data transmissionThe contents
transmitted on the Iub interface include: The user data
encapsulated in the AAL2 format (common channel and dedicated
channel)Signaling data encapsulated in the AAL5 formatBTS operation
& maintenance data # Content Overview congestion types
Reason and solution for congsetion
Congestion statistic
Discussion #Why CE Congestion???
#How to solve CE Congestion?Allmost CE congestion due to UL CE
Congestion Install more WBBP to get more UL, DL Ces for NodeB
Use CE dynamic allocation algorithmBoardNumber of CellsUL CE
NumberDL CE
NumberWBBPa3128256WBBPb136464WBBPb23128128WBBPb36256256WBBPb46384384WBBPd16192192WBBPd26384384WBBPd36256256
#Why CODE Congestion???
Radio bearerSFRadio bearerSFSpeech 12.2 UL64Speech 12.2
DL128Data 64 kbps UL16Data 64 kbps DL32Data 128 kbps UL8Data 128
kbps DL16Data 144 kbps UL8Data 144 kbps DL16Data 384 kbps UL4Data
384 kbps DL8SF = chip rate / symbol rateHigh data rates low SF
codeLow data rates high SF code #How to solve CODE Congestion?
Increase parameter HsPdschMaxCodeNum to maximum=15 #
How to solve CODE Congestion?Increase parameter
HsPdschMaxCodeNum to maximum=15But HsPdschMaxCodeNum not a
heaven!!!Where is paradise for CODE congested solution? #Why Power
Congestion???Uplink interferenceIf the uplink interference of the
BTS reaches a certain extent, the terminal will be impossible to
meet the requirements of demodulation quality through improving the
transmitting power, and the terminal will be impossible for access
or service.
Downlink powerWhen the downlink transmitting power of the BTS
reaches the load threshold, no redundant power is available for
allocation. This will make the terminal impossible for access or
service #How to solve Power Congestion?Increase UlTotalEqUserNum
and DlTotalEqUserNumBut these 02 parameters also not God
medichine
Where is paradise for Power congested solution?
#Why IuB Congestion??? When calculating the Iub interface
traffic, it is necessary to calculate the throughput rate of each
service type.
According to the planned user quantity, we obtain the total
traffic of the Iub interface, and estimate out the transmission
configuration of the Iub interface.
# Content Overview congestion types
Reason and solution for congsetion
Congestion statistic
Discussion #Statistic for Congetion
#Statistic for Congetion
#Statistic for Congetion
# Content Overview congestion types
Reason and solution for congsetion
Congestion statistic
Discussion #Discussion and cases sharing
#
Thank You for your attention! #
