CSFB to GSM/UMTS and related events
CSFB to GSM/UMTS is a reasonably simple procedure on paper, but can lead to quite some confusion when implementing in a live network. In the following article, we will explain …
PDCP Layer Average Throughput calculation in LTE
It is common for operators to measure average throughput of the User Plane because this is what most subscribers can/want to see. Calculating throughput for other LTE layers can sometimes …
eNodeB Sleeping Algorithms
The Problem An operator requested 3DB CONSULT experts to provide details on different algorithms, their use cases, benefit and impact to network KPI’s. Explanation / 3dB consult recommendation Using eNodeB …
Inter-PLMN Handover
The Problem An operator was having difficulties with inter PLMN Handover. The handover was X2 with no change in MME, MME Group or SGW. The TAC number was same for …
Most common problems in LTE networks
3dB consult has listed the most common problems seen in LTE networks and now they provide some suggestions how to tackle them. Load Balancing For LTE load balancing operators can …
What is the purpose of deltaTib in 36.101 for inter-band CA?
For carrier aggregation the UE is allowed to set its configured maximum output power PCMAX,c on serving cell c and its total configured maximum output power PCMAX. The configured maximum output power on serving cell c shall be …
How to reduce call drop rate on VoLTE networks
VoLTE is a new technology and is causing operators more problems than initially expected. One of the most common issues is Call Drop Rate when using VoLTE. Here are some …
CSFB Strategy: HO based or Redirection based
For redirection-based CSFB, UE initiates call setup from RACH. For handover-based CSFB, UE establish call in 4G LTE, and then performs handovers to 3G. Handover-based CSFB would deliver higher call …