This document describes the RAN Sharing feature for Huawei WCDMA RAN 12. It covers the overview, technical description, engineering guidelines, and parameters related to the feature
RAN Exceptions
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parameters
High Value Feature
Introduction Table of contents
Overview on the feature Following are optimizations implemented for the HSUPA scheduler, for accelerating the uplink speed: •
•
•
•
Higher initial allocation, quicker ramp up and faster application of serving grants – to boost UL speed in low and medium loaded conditions. This would significantly increase the upload times of small/medium sized files
Bitrate
Time
Non-zero UL bitrate allocations allocations for all reconfiguration cases and faster faster ramp up to higher bitrate, in low lo w and medium loaded conditions Current set of criteria for upgrading UEs reporting reporting "Happy" is very stringent. stringent. With this feature the criteria is optimized, especially in Low and Moderate load conditions such that higher grants/throughput grants/throughput could be allocated to Ues You need following the supported BTS HW HW configurations: - FSMr2 + FSMr2 - FSMr3 + FSMr2 - FSMr3 + FSMr3
Serving Grants Grants
Overview on the feature On •
RAN3451 enhances end user experience by providing increased high-speed uplink packet access (HSUPA) throughputs and reduced latency
Off Bitrate
•
Time •
•
•
Target is that based on Cell Load conditions the available resources are optimally utilized to maximize the end user UL experience and reduced Round Trip Time (RTT) WBTS internal scheduling algorithm algorithm optimization applicable for all HSPA UEs (3GPP Rel6 onwards) Supported on FSMr2 FSMr2 and newer System Module variants
Serving Grants Grants
Overview on the feature If RAN3451 will be enabled • • •
8-10% increase in HSUPA Cell throughput Multiple BTS enhancements especially especially for low and medium cell load conditions conditions This is to optimize the amount amount of LTE measurements to to facilitate delays caused by those measurements be minimized Higher initial bitrate upon call setup
0-180 Kbps
Quicker ramp up from lower to higher bitrate during the call
e t a r a t a D
> 180 Kbps
Time
Fix 40ms 40ms for 2ms TTI UEs
Fix 60ms for 10ms TTI UEs 20ms 40ms 60ms 80 ms 100ms
Previous fixed timings do not apply anymore; SG is sent more faster
Fix 40ms for 2ms TTI UEs
Fix 60ms for 10ms TTI UEs 20ms 40ms 60ms 80 ms 100ms
e t a r a t a D
Time
Before & after
Before •
Before RAN3451, HSUPA scheduler is too conservative in allocation of serving grant/UL bit rate to UEs leading to under-utilization of cell capacity especially when the cell is low/moderately loaded
After •
•
The introd oduc uces es HS HSUP UPA A sche sc hedu dule lerr RAN3451 intr enhancements making it more efficient in utilizing the avai av aila labl ble e UL ca capa paci city ty in lo low w an and d me medi dium um lo load ad conditions. These enhancements/optimizations result in bet better ter ini initia tiall bit bitrat rate e and fas faster ter acc accele elerat ration ion to higher bit rates in low and medium loaded cells End End us user er UL ex expe peri rien encce wi will ll be en enh han ance ced d wi with th increased HSUPA throughputs and reduced latency
BSW/ASW License control in NE License control attributes RAS SW component
ASW BTS LK Long-term on/off
RAN
Benefits and Gains Table of contents
RAN3451 Fast HSUPA Bitrate Accelerator •
•
Faster FTP upload and ping response times for low and medium loaded conditions Higher Cell Cell throughput throughput for low and medium medium loaded conditions conditions:: - 8-10% gain for low loaded sites - 4-6% gain for moderate loaded sites
•
Zero throughput throughput allocation allocation during reconfiguration reconfiguration cases is reduced with this feature
•
Better performance in benchmark exercise with other operators
Interdependencies Table of contents
extensions
RAN3043 Advanced Time Division Scheduling RAN3388 Time Division Scheduling for High Uplink Data Rates •
When Fea Featur tures es RA RAN30 N3043 43 and RAN RAN338 3388 8 are act activa ivated ted tog togeth ether er with RAN3451, the upgrades are made faster in 2ms one HARQ state with the quicker ramp up steps and faster application of serving grants. These steps help to get stable and improved i mproved throughput for RAN3043
More details available on WebNEI: WebNEI: RAN3043 RAN3043,, RAN3383
extensions
RAN3444 Load Based HSUPA Throughput Upsurge •
When When Fea Featur tures es RAN RAN345 3451 1 and RAN RAN344 3444 4 are act activa ivated ted tog togeth ether, er, the expected to make more UEs to report Unhappy during low cell load conditions, to utilize the UL load more effectively. These steps help to gain in cell throughput
More details available on WebNEI: WebNEI: RAN3444 RAN3444
RAN3433 HSUPA Activity Based Power Control •
When Features RAN3451 and RAN3433 are activated together, the UE bitrate is increased sharply from low bitrate to very high bitrate
More details available on WebNEI: WebNEI: RAN3433 RAN3433
Configuration Management Table of contents
New Parameters Abbreviated name
Full name
BTSSCW:fastHsupaBi trateAccEnabled
Fast HSUPA Bitrate Accelerator
Description This parameter indicates if Fast HSUPA Bitrate Accelerator feature is activated in the BTS or not.
Range and Defaul Def aultt PKD PKDB B link step 0 (disabled) 1 (enabled)
0 (disabled)
link
Deployment Aspects Network graphic boxes
Network element boxes
Table of contents
Configuration of RAN3451 Fast HSUPA Bitrate Accelerator Procedure Proced ure notifi notification: cation: The RAN3451 RAN3451 Fast HSUPA Bitrate Bitrate Accelerator Accelerator feature feature is an optional optional feature (ASW) and it is cont controlle rolled d by the BTS license key 'Fast HSUPA Bitrate Accelerator LK’
Stepss to acti Step activat vation: ion: The RAN3451 Fast HSUPA Bitrate Accelerator feature is enabled in the cell when the following conditions are true: •
•
The BTS license key Fast Fast HSUPA Bitrate Accelerator' is installed in the BTS and the state of the license license key is ‘On’ (1) BTSSCW:fastHsupaBitrateAccEnabled abled – parameter Activate the Fast Fast HSUPA Bitrate Accelerator Accelerator in the cell by setting BTSSCW:fastHsupaBitrateAccEn to value Enabled (1)
Performance Aspects Table of contents
Feature impact on KPIs Feature impact
How to measure?
8-10% 8-10 % in incr crea ease se in Lo Low w lo load ad co cond ndit itio ion n 4-6% 4-6 % in incre creas ase e in Mo Moder derat ate e lo load ad co cond nditi ition on
KPI:
Low/modera Low/mod eratel telyy loa loaded ded cel cells ls wit with h rea reall net networ workk tra traffi fficc RNC_5460a Average HSUPA User Throughput: comprising a mix of bursty and non bursty UL data transfer. RNC_1883d Active HSUPA Cell Throughput: - FiVe setup with Low to Moderate traffic
New Counters
There are no new and modified counters related to the RAN3451 Fast HSUPA Bitrate Accelerator feature.
