WiNeS - Dynamic Network Simulator

Selected Features

The UTRA/FDD Dynamic Network Simulator comprises outstanding technical features that make it an excellent solution for 3G network rollout and operation.

Feature Overview

enhanced mobile channel modeling

	comprehensive Transport Channel modeling
	sophisticated link level interface
	protocol stack modeling
	realistic modeling of RRM algorithms
	various user data traffic models

Feature Description

Radio Channel Modeling

The simulator performs an interference-based analysis of CDMA radio resources. Thus it comprises an enhanced modeling of the propagation properties in the mobile radio channel:

	Arbitrary, realistic pathloss maps can be used in form of matrices. High accuracy is achievable by using high-resolution 3D ray-tracing pathloss maps or applying Pathloss Tuning based on drive test measurements.
	Location-dependent log-normal shadowing is modeled with a configurable decorrelation length. The standard deviation depends on the clutter.
	Slot-based fast fading is modeled with different fading profiles depending on the clutter and user speed.

Transport Channel Modeling

Most of the UMTS Transport Channels in conjunction with their physical counterparts are implemented in the Dynamic Network Simulator:

	CPICH
	BCH
	FACH
	AICH
	DCH
	RACH
	HSDPA
	HSUPA

Compressed Mode can be investigated for its impact on network capacity and quality. Furthermore, the simulator is enabled to represent hierarchical cell structures with multiple carrier frequencies.

Link Level Interface

Since the simulator basically performs an interference-based analysis of CDMA radio resources, the properties of the link level interface are modeled in a sophisticated manner. The following properties are considered in the link level interface:

	comprehensive configuration of the equipment/hardware capabilities
	fast (slot-based) inner loop power control
	intelligent multi-stage mapping of measured E_b/N₀ to BER and BLER
	fast fading profile and OVSF code orthogonality factor depending on the clutter and the user speed
	several methods for measurement filtering

UMTS Protocol Stack

The UMTS protocol stack entities have been modeled in the Dynamic Network Simulator as far as they have an impact on the physical data transmission. The implemented entities embrace:

User Data Packet Stream (higher layers): The user data packets that are generated by an application.

RLC layer with different modes:

	transparent mode RLC
	acknowledged mode RLC (incl. ARQ)

MAC layer for data packet scheduling.

PHY layer with fast power control and power balancing

Radio Resource Management

In a UMTS network, many RRM algorithms interwork to ensure a stable network performance. Due to the significant impact of these algorithms on the network behavior, the simulator implements comprehensive and partially vendor-specific models of the following RRM entities:

	Initial Cell Selection
	Admission Control
	Radio Resource Allocation (code allocation)
	Radio Bearer Translation
	Radio Bearer Reconfiguration
	Congestion Control (DL; fast UL)
	Active Set Control (Soft/Softer Handover)
	Compressed Mode (Inter-Frequency Handover, Inter-System Handover)
	Radio Link Failure Detection
	ARQ, HARQ
	Power Control (open loop; fast inner loop; outer loop)
	Power Balancing
	Fast Data Rate Up-/Downgrading

Traffic Models

WiNeS comprises a bunch of elaborate traffic models that enable the investigation of arbitrary mixed services configurations. The user traffic models include:

	speech/video traffic model (UL/DL streams with certain activity factor)
	file transfer model (single file request in UL and subsequent file download in DL)
	WWW browsing traffic model
	Messaging traffic model (data packets in UL or DL)
	Streaming traffic model (CBR/VBR)
	TCP modeling

Links:

Dynamic Simulator Module
Key advantages

Approach
Dynamic and system level network modeling

Features
Modeled RRM algorithms and result parameters

Purchase Information

back to:

WiNeS Platform for 3G

Comprehensive Analysis Opportunities

Results are provided as network specific, UE specific, or service specific parameters over time/location (link tracing) and as statistical distributions. In addition to a simulation area, an analysis area can be specified to exclude boundary effects.

Statistics:

	number of service requests / access attempts
	number of blocked, dropped, and successful calls
	reason of blocked and dropped calls
	handover statistics (attempts, success, blockings, dropped links)
	code utilization, Soft Handover overhead
	network load / throughput statistics

Trace Parameters:

	transmit powers, receive powers
	C/I, intra- and intercell interference
	noise rise (uplink load)
	power control error
	allocated codes, allocated channel elements
	Soft Handover overhead (channel elements, codes, transmit power)
	primary and best cell
	Active Set size
	block error probabilities, throughput, delay
	offered / received user data packets
	offered / received / repeated / lost RLC PDUs
	transmitted / received throughput
	CQI