Some Special Antenna Technologies and Scheduling Mode for LTE MIMO and Beam Forming are critical features in determining the actual link budget required for the Operator’s network. However, these two features are also critical features from a capacity perspective as they can also improve the efficiency of frequency reuse and reduce the intra-frequency interference within … Read more
3GPP Services Classification and EUTRAN Capacity Limiting Factors Here I write on 3GPP Services Classification and EUTRAN Capacity Limiting Factors for LTE. 3GPP Services Classification Being a data centric technology, LTE has well defined classifications for Quality of Service. In general, there are two main classes of service type, with Guaranteed Bit rate vs with … Read more
Definition of EUTRAN Capacity Limiting Factors for LTE Here I write not all but important List of EUTRAN Capacity Limiting Factors for LTE and its definition. Impact of Interference on Capacity Interference is always a main contributor to capacity degradation in 1G to 3G cellular network and LTE is no difference. Besides external interference, there … Read more
Operating Frequency Band and RSRP for LTE Choosing which frequency band to operate a LTE network is one of the most critical decision. Operator has to make when it comes to capacity planning. The frequency propagation and penetration characteristics will determine the number of sites that need to be built in order to cover the … Read more
Capacity Definition in LTE as Operator level A commonly accepted definition of capacity is the one provided by Shannon which states that capacity is the maximum achievable set of rates in multiple access channels with an arbitrarily small probability of error. As this metric represents a bound in performance, in practice, the sum of the … Read more
Why Operators require Spectrum Reframing in LTE Here I write down one basic idea of Spectrum reframing in LTE and why operators require spectrum reframing for LTE. Operators worldwide are looking forward to new LTE technologies deployment but not every one of them possess brand new spectrum required for LTE deployment. As a result, many … Read more
Analysis of Background Noise in LTE RF Assume that the eNodeB receiver’s IF bandwidth is Bw (unit: MHz), and the eNodeB receive noise figure is Nf (unit: dB), The equivalent noise level of the eNodeB receiver is as follows: No = –174 + 10 log (Bw) + Nf (Unit: dBm) If the demodulation carrier-to-interference ratio … Read more
Theoretical Analysis of Interference by Non Colocated eNodeB Here I write about a simulation analysis of the system performance deterioration caused by the following four types of interference: eNodeB->UE, UE->eNodeB, eNodeB->eNodeB, and UE->UE when two systems are not co-located. From simulation result with no filtering, when the eNodeBs are not co-located, the most serious interference … Read more
Theoretical Analysis of Interference under Site Sharing Here I write about a simulation analysis of the system performance deterioration caused by the following four types of interference: eNodeB->UE, UE->eNodeB, eNodeB->eNodeB, and UE->UE when two systems share the eNodeBs. During simulation, it is assumed that the time percentage of the interference occurrence is 100%, that is, … Read more
Interference between Different Carriers and within same carrier in LTE Absence of synchronization is one of the main sources of interference between TDD based systems belonging to different carriers. The figure below provides a quick view of what will happen if there is asynchronous situation between different networks. Scenarios (a) and (c) described below clearly … Read more