How is CQI calculated?
CQI (Channel Quality Indication) – Instead of expressing the CQI as a received signal quality, the CQI expressed as a data rate that terminal (UE) can support under the actual radio conditions. SINR is used for calculating CQI. In LTE, CQI has only 15 codes. MCS parameter is assigned based on the CQI value.
What is CQI in UMTS?
UMTS Quick Reference Go Back To Index Home : www.sharetechnote.com. CQI. CQI stands for Channel Quality Indicator. As the name implies, it is an indicator carrying the information on how good/bad the communication channel quality is. This CQI is for HSDPA.
What is the reason for poor CQI in LTE?
b) If low CQI values are found after a CQI report is obtained, then downlink interference might be the cause of low throughput. a) Run a report for BLER in the cells identified. The BLER should be smaller or equal than 10%. If the value is larger, then, there is an indication of bad RF environment.
What is CQI in 5g NR?
The CQI is an indicator of channel quality. The CQI index is a scalar value from 0 to 15. It provides the information about the highest modulation scheme and the code rate (MCS) suitable for the downlink transmission to achieve the required block error rate (BLER) for given channel conditions.
What are CQI methods?
Continuous Quality Improvement (CQI) is a quality management process that encourages all health care team members to continuously ask the questions, “How are we doing?” and “Can we do it better?” (Edwards, 2008). To address these questions, a practice needs structured clinical and administrative data.
How is throughput in LTE 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.
Why is there no CRS in 5G?
A large number of RE (Resource Elements) are used for CRS, which also wastes DL power. Well, 5G is designed to have an ultra-lean design, eliminating the continuous broadcast of reference signals.
What is CQI reporting?
CQI stands for Channel Quality Indicator. As the name implies, it is an indicator carrying the information on how good/bad the communication channel quality is. This CQI is for HSDPA. (LTE also has CQI for its own purpose).
What is CDM in 5G?
The solution is Cloud Data Management (CDM) in which each 5G Network Function (NF) is treated as a service. CDM provides a data layer that stores information that NF’s need, including fast-changing session/state data, subscriptions, policy and configuration data.
What is the CQI value in HSDPA?
In HSDPA, the CQI value ranges from 0 ~ 30. 30 indicates the best channel quality and 0,1 indicates the poorest channel quality. Depending which value UE reports, network transmit data with different transport block size.
Is it possible to have high throughput with high CQI?
As mentioned above, you would not get always high throughput whever you have high CQI, but it is very likely to see low CQI when you see throughput dips (drops) as marked in shaded box. One thing I notice from this specific example is that BLER is a little bit higher than I expected.
What is the range of CQI value?
As you see in the table, the range of CQI value is 0~30. 30 means the best channel quality and lower number indicates poorer channel quality. And Network has to send the data with the proper transport block size according to the CQI values. For example,
What is the relationship between CQI and transport block size?
If network gets high CQI value from UE, it transmit the data with larger transport block size and vice versa.