Flexible RLC PDU Size (Release 7)
Flexible RLC PDU Size was interdicted in Release 7 in order to decrease RLC protocol overhead and to avoid sequence number stalling Flexible RLC is used with MAC-ehs in Release 7. Mac-ehs is a new feature interdicted in Release 7 to increase the downlink throughput.
Categories: RLC Tags:
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
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.
Categories: UMTS Tags:
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:
- New MAC entities: MAC-e/es in UE and MAC-e in NodeB and MAC-es in RNC.
- Transport channel: E-DCH
- Physical channels: E-DPDCH/DPCCH, E-HICH, E-RGCH, E-AGCH
- Transmission Time Interval: 2 ms or 10 ms
- SF = 2 can be used
- Fast Layer 1 transmission and retransmission
- Hybrid- ARQ using soft combining and incremental redundancies
- NodeB control grants or data rate
- New Frame Protocol in Iub/Iur interface (E-DCH FP)
Categories: HSUPA Tags:
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
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
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
