Research Broadband
RB
„Vorsprung durch Spezialisierung“
Research Fields: 3GPP and Non-3GPP Technologies
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GSM/EDGE
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UMTS/HSPA+
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LTE/LTE-Advanced
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3GPP-WiFi interworking/offloading
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IP-based data networks​
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System-Level Simulations:
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Live and synthetic networks
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Blended approach: measurements and calculation results
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Mobility implementation
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RRM studies (e.g. scheduler, UL/DL PC, AMC, feature interdependencies)
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Inputs related to QoS and traffic statistics
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Studies for special environments (e.g. inhouse, train, stadium, aircraft)
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Heterogeneous networks
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Protocol Analysis and Simulations:
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Protocol-layer interworking
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Parameter verification
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Performance evaluation
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E2E-relevance
New Methods of Data Analysis
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Blending of various data types e.g. site configuration and database, PM/KPI, drivetest and network trace
On-Demand Research Topics, e.g.:
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Idle Mode Signaling Reduction for LTE and 2G/3G
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Multi-operator CN – MOCN and EPLMN
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LAC+RAC harmonisation between 2G and 3G
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Network audit of RAN, CS+PS core and backhaul combined with dimensioning
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Geotracing
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Features: ROI-analysis
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Refarming
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Single-RAN
- Initial Condition: Single Cell in ActiveSet of UE <-> non-Serving RG Down cannot be issued - High HARQ BLER for concerned E-DCH User bouncing between 5% and 50% during File Upload - E-DCH TTI Reconfiguration from 2 ms to 10 ms and back to 2 ms <-> UTRAN goes for higher throughput rates when RTWP allows it >>Recorded and displayed by TEMS™ Investigation: www.ascom.com. © 2014 by Ascom Group. All rights reserved. <<
- Reference E-TFCI Analysis >>Recorded and displayed by HSUPA_Info<<
- Low HS-SCCH Decode Success Rate as consequence of high uplink E-DCH BLER >>Recorded and displayed by TEMS Investigation: www.ascom.com<<
- Initial Condition: Single Cell in ActiveSet of UE <-> non-Serving RG Down cannot be issued - High HARQ BLER for concerned E-DCH User bouncing between 5% and 50% during File Upload - E-DCH TTI Reconfiguration from 2 ms to 10 ms and back to 2 ms <-> UTRAN goes for higher throughput rates when RTWP allows it >>Recorded and displayed by TEMS™ Investigation: www.ascom.com. © 2014 by Ascom Group. All rights reserved. <<
Example: Rise of Uplink RTWP Caused by High Amount of E-DCH Users, e.g. Simultaneously Active UE’s > 20
1) How should the E-DCH Scheduler adjust the SG for high amount of UE’s having non-real time Bearers active and at the same time and not endanger the BLER-target for Rel. 99 real time Bearers?
2) How should be the BLER-target for non-real time Bearers adjusted? E.g.
2A) High BLER-target causes low SIR-target -> high HARQ-BLER causes low effective user throughput or
2B) Low BLER-target causes high SIR-target -> low HARQ-BLER
Method 2A) versus 2B): Advantages/Disadvantages of both methods
3) How can the E-DCH Scheduler reduce the uplink RTWP rise? E.g.
​3A) ​Interference Cancellation (IC) and/or
3B) Time-Domain Scheduling or
3C) Simply reducing the SG for all UE’s? or a new way:
3D) E-DCH Scheduler in NodeB should maximize SG for each active E-DCH UE (considering Scheduling Info, UE’s activity factor) as long as Rel. 99 UE’s are not suffering from BLER-increase above Threshold(Service_User) and as long as effective E-DCH throughput on Iub can be increased.