January 12th, 2010 by Prashant Panigrahi in Freebies , RLC , Software , UMTS

UMTS Radio Link Protocol Decoder

UMTS-RLCDecoder is small but powerful tool for decoding RLC header information both for Acknowledged Mode RLC PDUs and Unacknowledged Mode RLC PDUs.

It Can decode the following

  • RLC AMD PDU Header and Length Indicator
  • RLC Control PDUs including SUFIs
  • RLC UMD PDU header and Length Indicator
December 11th, 2009 by Prashant Panigrahi in Freebies

Google Wave Invitation Give Away

We have 8 google wave invitations for the first 8. Leave a comment in the post.

November 10th, 2009 by Prashant Panigrahi in LTE

Introduction to LTE

LTE stands for Long Term Evolution. The LTE project was initiated in November 2004 and the focus was on enhancing the Universal Terrestrial Radio Access (UTRA) and optimizing the 3GPP’s radio access architecture.

The following areas are covered:

  • What is LTE?
  • 3GPP System Evolution
  • System requirements for LTE development
  • LTE System Architecture
November 4th, 2009 by Prashant Panigrahi in UMTS

UMTS Cell Selection Procedure

Whenever PLMN has been selected by NAS, the UE shall attempt to camp on the selected cell. This tutorial tells how a particular cell is selected.
October 3rd, 2009 by Prashant Panigrahi in HSUPA

HSUPA: High-Speed Uplink Packet Access

HSUPA: High-Speed Uplink Packet Access
High Speed Uplink Packet Access (HSUPA) is introduced in 3GPP Release 6 standards to improve the uplink UE data rate which was significantly low up to Release 5. To improve the uplink data rate some new functionality are added:

  1. New MAC entities: MAC-e/es in UE and MAC-e in NodeB and MAC-es in RNC.
  2. Transport channel: E-DCH
  3. Physical channels: E-DPDCH/DPCCH, E-HICH, E-RGCH, E-AGCH
  4. Transmission Time Interval: 2 ms or 10 ms
  5. SF = 2 can be used
  6. Fast Layer 1 transmission and retransmission
  7. Hybrid- ARQ using soft combining and incremental redundancies
  8. NodeB control grants or data rate
  9. New Frame Protocol in Iub/Iur interface (E-DCH FP)
September 23rd, 2009 by Prashant Panigrahi in RLC , UMTS

UMTS RLC Status PDU: SUFI RLIST

The STATUS PDU is used to exchange status information between two RLC AM entities.

In this tutorial following topics are discussed:

  • What is SUFI RLIST?
  • Different fields in the SUFI RLIST
  • Example with encoding details
September 21st, 2009 by Prashant Panigrahi in RLC , UMTS

UMTS RLC Status PDU: SUFI LIST

This tutorial describes the UMTS RLC SUFI LIST.

In this tutorial following topics are discussed:

  • What is SUFI LIST?
  • Different fields in the SUFI
  • Example with encoding details
September 21st, 2009 by Prashant Panigrahi in RLC , UMTS

UMTS RLC Status PDU: SUFI NO_MORE & SUFI ACK

The STATUS PDU is used to exchange status information between two RLC AM entities.

In this tutorial following topics are discussed:

  • Why STATUS PDU is required?
  • Status PDU Parameters
  • Different type of SUFIs
  • SUFI ACK described with an example
September 17th, 2009 by Naveed Mumtaz in UMTS

SRNS Relocation in UMTS Network

SRNS relocation is a procedure used during mobility scenarios when Control of the Serving Radio Network Subsystem (SRNS) is changed to another Radio Network Subsystem (RNS)

In this tutorial following topics are discussed:

  • Relocation Procedure
  • Serving RNS Relocation Procedure
  • Combined Hard Handover and SRNS Relocation Procedure
September 15th, 2009 by Prashant Panigrahi in Security , UMTS

UMTS Security: Entity Authentication

Entity authentication is the procedure of mutual authentication of UE or USIM and the network.

In this tutorial following topics are discussed:

  • What is Entity Authentication?
  • Authentication Vectors Generation
  • Authentication Procedure
  • Message sequence from UE point of view
Web Statistics