- What is a good CQI in LTE?
- Why are there 12 subcarriers in LTE?
- What is PRB in 5g?
- What is the duration of each frame in 5g?
- What is Coreset in 5g?
- What is mini slot in 5g?
- How many subcarriers are in 5g?
- What is subcarrier spacing in 5g?
- Why are there different subcarrier spacing in 5g?
- How does LTE calculate PRB?
- What is Pdcch?
- What is PRB in LTE?
- What is CC in 5g?
- What is FFS in 5g?
- What is codeword in 5g?
- What is layer mapping in 5g?
- What is search space in 5g?
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..
Why are there 12 subcarriers in LTE?
In the downlink, the subcarriers are split into resource blocks. This enables the system to be able to compartmentalise the data across standard numbers of subcarriers. Resource blocks comprise 12 subcarriers, regardless of the overall LTE signal bandwidth. They also cover one slot in the time frame.
What is PRB in 5g?
A E-UTRA PRB (Physical Resource Block) is defined as consisting of 12 consecutive subcarriers for one slot (0.5 ms).
What is the duration of each frame in 5g?
5G NR defines a frame to be 10 milliseconds (ms) in duration, like 4G LTE. Each frame is divided into 10 subframes of 1 ms each. The 1 ms subframe is then divided into one or more slots in 5G, whereas LTE has exactly two slots in a subframe.
What is Coreset in 5g?
In 5G NR, CORESET is known as Control Resource Set. It is a set of physical resources within a specific area in Downlink Resource Grid and used to carry PDCCH (DCI). … Frequency allocation in a CORESET configuration can be contiguous or non-contiguous.
What is mini slot in 5g?
My Friend: So, what is mini-slot? Me: It is the minimum scheduling unit used in 5G NR, it occupies 2, 4 or 7 OFDM symbols (regardless of numerology), so a user can be allocated a mini-slot which is less than the slot (14 symbols) and it is suitable for low latency communication.
How many subcarriers are in 5g?
The physical layer of 5G-NR carries over many aspects of LTE including: Can be described in terms of a resource grid in frequency and time domain. Built on OFDMA based physical resource blocks consisting of 12 x subcarriers.
What is subcarrier spacing in 5g?
Numerologies One major new feature of 5G is multiple numerologies which can be mixed and used simultaneously. A numerology is defined by its subcarrier spacing (the width of subcarriers in the frequency domain) and by its cyclic prefix. 5G defines a base subcarrier spacing of 15 kHz.
Why are there different subcarrier spacing in 5g?
The general tendency is that slot length gets shorter as subcarrier spacing gets wider. Actually this tendency comes from the nature of OFDM.
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.
What is Pdcch?
PDCCH (Physical Downlink Control Channel) 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. Number of the symbols (L) for PDCCH can be 1,2, or 3. (
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.
What is CC in 5g?
Neural network approach for component carrier selection in 4G/5G networks. … Indeed, 4G and 5G can aggregate up to five component carriers (CC), simultaneously, to support a higher bandwidth. In this context, CC selection method is necessary.
What is FFS in 5g?
In many cases I had to search through many different documents just to find the meaning (full words) for those acronyms….AcronymMeaningF1-UF1 User plane interfaceFDDFrequency Division DuplexFECForward Error CorrectionFFSFor Further Study237 more rows
What is codeword in 5g?
5G supports transmission of up to 8 layers to a single user on the downlink. This means that there can be up to eight streams transmitted in parallel. Those streams are coming from one or two codewords–one codeword if there are fewer than four layers, and two codewords if there are more.
What is layer mapping in 5g?
2 x 2 MIMO, 2 Layer, 2 Codeword (2) Layer Mapping : This is the process where each codeword is mapped to mapped to one or multiple layers. Refer to Layer Mapping page. (3) Precoding : This is process where the layer data are allocated to multiple antenna ports (logical antenna ports in this stage).
What is search space in 5g?
5G/NR – Search Space Home : www.sharetechnote.com. Search Space. PDCCH Search Space refers to the area in the downlink resource grid where PDCCH may be carried. UE perform blind decoding throughout these search space trying to find PDCCH data (i.e, DCI).