What is CQI and MCS?
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 a good CQI value in LTE?
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.
What is CQI range in LTE?
Channel Quality Indicator. In the LTE system, the CQI is used by the mobile to indicate the channel quality to the eNB. The CQI reported value is between 0 and 15. This indicates the level of modulation and coding the UE could operate.
Which channel carries CQI information to Enodeb?
CQI is carried by PUCCH or PUSCH depending on the situation as follows. Regarding CQI report period and configuration, refer to CQI, PMI, RI Reporting Configuration part.
What is MCS mode?
When to use MSC mode MSC is specifically designed for the transmission of data over a USB interface. Typically this is used between a USB device (like an MP3 player) and a computer. This USB transfer mode is also sometimes called UMS (short for USB Mass Storage) which can be confusing.
What is MCS and where it is used?
For any communication technology, Modulation and Coding Scheme (MCS) defines the numbers of useful bits which can carried by one symbol. In contrast with 5G or 4G, a symbol is defined as Resource Element (RE) and MCS defined as how many useful bits can be transmitted per Resource Element (RE) .
Which CQI is used for IMS Signalling?
Standardized QCI .
| QCI | Service Type | Examples service |
|---|---|---|
| 5 | Non-GBR | IMS signaling |
| 6 | Non-GBR | Voice, Video (live streaming), interactive gaming |
| 7 | Non-GBR | Video streaming(buffered streaming) |
| 8 | Non-GBR | TCP based (e.g. www, email), chat, FTP, p2p file sharing |
What does Pdcch carry?
PDCCH is a physical channel that carries downlink control information (DCI) and it has characteristics as described below. Mapped to the first L OFDM symbols in every downlink subframe. PDCCH carries DCIs and the DCI carries Transport format, resource allocation, H-ARQ information related to DL-SCH, UL-SCH and PCH.
How is MCS determined?
MCS depends on radio link quality. The better quality the higher MCS and the more useful data can be transmitted. And vice versa the worse radio conditions the lower MCS and the less useful data can be transmitted. In other words MCS depends on error probability.
What is MCS in WLAN?
The Modulation Coding Scheme (MCS) index is an existing industry metric based on several parameters of a Wi-Fi connection between a client device and a wireless access point, including data rate, channel width, and the number of antennas or spatial streams in the device.
How is MCs chosen based on CQI index?
Based on the CQI index the equivalent modulation and code rate are decided. And then based on MCS. the number of information bits is got from the Transport Block Size Determination calculations in standard 38.214 – 5.1.3.2. and see example 4.3. A user would get an idea of how MCS is chosen by looking at the results table of that example.
What are CQI and MCs tables for 5G communications?
Other aspects are directed to systems and methods for configuration and design of channel quality information (CQI) and modulation and coding scheme (MCS) tables for 5G communications, including flexible slot format indication (SFI) for 5G-NR communication systems, including ultra-reliable communications.
Which is the SINR to a CQI mapping scheme?
We propose a new SINR to a CQI mapping scheme which selects the CQI value that is around the middle of the range observed in the region between the minimum and maximum values that are obtained from extensive simulations for the corresponding speed under consideration.
How many CQI values are there in LTE?
In LTE, there are 15 different CQI values randing from 1 to 15 (4 bits) and mapping between CQI and modulcation scheme, transport block size is defined as follows (36.213)