- How is CQI calculated in LTE?
- How can I improve my DL throughput in LTE?
- What is MCS in LTE?
- What is a good Sinr?
- How many PRB is 5g?
- What is PCI in LTE?
- What is a good CQI in LTE?
- How is LTE throughput calculated?
- What is transmission mode in LTE?
- What is LTE accessibility?
- What is PRB in LTE?
- How does LTE calculate PRB?
- How can spectral efficiency be improved in LTE?
- What is spectral efficiency in LTE?
- How can we calculate LTE DL UL throughput?
- What is LTE transport block?
- What is subcarrier spacing in LTE?
- What is RB and PRB in LTE?
- What is call flow in LTE?
- What is KPI in LTE?
How is CQI calculated in LTE?
(LTE also has CQI for its own purpose).
CQI is the information that UE sends to the network and practically it implies the following two: 1) Current Communication Channel Quality is this-and-that..
30 indicates the best channel quality and 0,1 indicates the poorest channel quality..
How can I improve my DL throughput in LTE?
One thing that can really help in increasing the throughput is the optimum mobility strategy. Consider two LTE layers, for instance L800 and L1800 with same bandwidth. In this case, L800 will have a higher coverage as it is a lower frequency. So, the user count on L800 will be higher compared to L1800.
What is MCS in LTE?
MCS (Modulation and Coding Scheme) defines how many useful bits can be transmitted per Resource Element (RE). MCS depends on radio link quality. The better quality the higher MCS and the more useful data can be transmitted.
What is a good Sinr?
SINR/SNR – The signal-to-noise ratio of the given signal. RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).
How many PRB is 5g?
In 5G, One NR Resource Block (RB) contains 12 sub-carriers in frequency domain similar to LTE. In LTE resource block bandwidth is fixed to 180 KHz but in NR it is not fixed and depend on sub-carrier spacing.
What is PCI in LTE?
Physical Cell ID (PCI) is one of the most important cell’s identifier in the wireless network of LTE system. … PCIs, or Physical Cell Identifiers, in LTE networks provide a psuedo- unique value for identifying eNodeBs. The PCI value is created from two components – PSS and SSS.
What is a good CQI in LTE?
(LTE also has CQI for its own purpose). i) Current Communication Channel Quality is this-and-that.. In HSDPA, the CQI value ranges from 0 ~ 30. 30 indicates the best channel quality and 0,1 indicates the poorest channel quality.
How is LTE throughput calculated?
If modulation used is 64 QAM (6 bits per symbol) then throughput will be 16.8×6=100.8Mbps for a single antenna port. If we consider a 2×2 MIMO system then this throughput will be double i.e. 100.8×2= 201.6 Mbps and with 4×4 MIMO system then throughput is about 100.8×4= 403.2 Mbps.
What is transmission mode in LTE?
In LTE, usually they use multiple Antenna for downlink (at least from Category 3 UE and higher), meaning that eNode (Network) has use multiple Tx Antenna and UE use multiple Rx antenna. … In LTE, they give a special name for each of the way of transmission and it is called ‘Transmission Mode’.
What is LTE accessibility?
Accessibility KPIs in SAE/LTE network are used to measure the success rate of users in accessing the network. The accessibility KPI is expressed in terms of probabilities that state how likely the user will be able to access the service for certain service times and conditions.
What is PRB in LTE?
A recurring topic in LTE radio planning pertains to the maximum acceptable LTE radio interface load, up to which a targeted user data rate can be maintained. We explore this topic by using Queuing Theory elements to express the downlink user throughput as a function of the LTE Physical Resource Block (PRB) utilization.
How does LTE calculate PRB?
Physical Resource Block (PRB) = 2*Resource Block = 12 Subcarriers x 14 OFDM in 1ms. RE can deliver 2, 4, 6, 8 bits in QPSK, 16QAM, 64QAM, 256QAM respectively. If we calculate for 64QAM as 6bits since 256QAM not widely spread (check Samsung S7 in T-Mobile). 20MHz ==> 100 PRB ==> 100*168*1000 = 16,800,000 RE in 1 s.
How can spectral efficiency be improved in LTE?
The spectral efficiency can be improved by radio resource management techniques such as efficient fixed or dynamic channel allocation, power control, link adaptation and diversity schemes. A combined fairness measure and system spectral efficiency measure is the fairly shared spectral efficiency.
What is spectral efficiency in LTE?
Spectral efficiency usually is expressed as “bits per second per hertz,” or bits/s/Hz. In other words, it can be defined as the net data rate in bits per second (bps) divided by the bandwidth in hertz. Net data rate and symbol rate are related to the raw data rate which includes the usable payload and all overhead.
How can we calculate LTE DL UL throughput?
To calculate LTE throughput the following steps should be performed:Define bandwidth. It can be 1.4, 3, 5, 10, 15 or 20 MHz. … Choose/define radio link quality. … The last step is to take a look at Transport Block Size table to determine how many bits can be transmitted per 1 TTI and multiply it by 1000 to get bps.
What is LTE transport block?
LTE Transport Block Concept. … The data from the upper layer (or MAC) given to the physical layer in LTE system is basically referred as transport block. For single antenna transmission mode viz. SISO , there will be 1 transport block which will be generated for each TTI(Transmission Time Interval).
What is subcarrier spacing in LTE?
The LTE OFDM subcarrier spacing equals 15 kHz for both downlink and uplink. The selection of the subcarrier spacing in an OFDM-based system needs to carefully balance overhead from the cyclic prefix against sensitivity to Doppler spread/shift and other types of frequency errors and inaccuracies.
What is RB and PRB in LTE?
In OFDMA, users are allocated a specific number of subcarriers for a predetermined amount of time. These are referred to as physical resource blocks (PRBs) in the LTE specifications. PRBs thus have both a time and frequency dimension.
What is call flow in LTE?
With Long Term Evolution (LTE) comes a myriad of new and exciting attributes. One of these is the LTE call flow itself. In fact, call flow and signaling is unique for LTE, and is driven by 3GPP standards. Call flow is how signaling and sessions are created across an LTE network.
What is KPI in LTE?
Are used to measure the availability of network, suitable or ready for users to use services. 📈 Utilization KPI. Are used to measure the utilization of network, whether the network capacity is reached its resource. KPIs for LTE RAN (Radio Access Network)