In which type of CQI feedback mode the UE reports CQI PMI and RI with reporting periods configured by the higher layer on the Pucch?
Periodic reporting
Periodic reporting: the UE reports CQI, PMI, and RI with reporting periods configured by the higher layer. PUCCH is used for this.
What is CQI Reporting in LTE?
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 PMI in CSI?
PMI(Precoding Matrix Indicator) CRI(CSI-RS Resource Indicator)
What is a CSI report?
CSI Report – Overview CSI stands for Channel Status Information. As the name implies, it is a kind of indicator how good or bad the channel is at a specific time. The CSI has three major components as below. Not all of these indicator is measured for every CSI report.
What is PMI and RI in LTE?
PMI stands for Pre-coding Matrix Indicator, and RI is Rank Indicator. These three values are computed on the fly in LTE systems and used to try to optimize resource allocation among the various user end devices (UEs) that are requesting service.
What is Ri in LTE?
LTE RI stands for Rank Indicator. RIs are applicable for open loop transmission and closed loop transmission modes. These modes use more than a single layer between layer mapping and precoding modules. • Transmission mode-3 indicates open loop spatial multiplexing.
How is CQI measured in LTE?
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 the concept of CQI?
Continuous Quality Improvement (CQI) is a deliberate, defined process which is focused on activities that are responsive to community needs and improving population health.
What is PMI and RI?
What is PMI in MIMO?
The MIMO base station is configured to switch between a single-user (SU)-MIMO mode and a multiple-user (MU)-MIMO mode during communications with the plurality of MIMO UE devices based on multi-rank precoding matrix indicator (PMI) feedback received from at least one of the MIMO UE devices.
What is CSI 32 port?
Channel State Information Reference Signal (CSI-RS) is a reference signal (RS) that is used in the Downlink (DL) direction in 5G NR, for the purpose of Channel Sounding and used to measure the characteristics of a radio channel so that it can use correct modulation, code rate, beam forming etc.
What is 5G codebook?
Putting it other way, Codebook is a kind of matrix (a matrix having complex value elements) that transform the data bit (PDSCH) to another set of data that maps to each antenna port.
Where does the periodic CQI report get sent?
– When the UE is allocated PUSCH resources in a subframe where a periodic CQI report is configured to be sent, the periodic CQI report is transmitted together with uplink data on the PUSCH. Otherwise, the periodic CQI reports are sent on the PUCCH.
What does a CQI report on LTE mean?
Size and format of the report depends on whether it is transmitted over PUCCH or PUSCH and whether it is a periodic or aperiodic CQI report. LTE supports wideband and subband CQI reporting. A wideband CQI value is a single 4-bit integer that represents an effectiveSINR as observed by the UE over the entire channel bandwidth.
How is CQI report transmitted with uplink data?
When a CQI report is transmitted together with uplink data on PUSCH, it is multiplexed with the transport block by L1 (i.e. the CQI report is not part of the uplink the transport block). The eNB configures a set of sizes and formats of the reports.
When to use aperiodic CQI on LTE UE?
Aperiodic CQI reporting is triggered when CQI request field is set to value 1 within PDCCH DCI-0 or Random Access Response Grant on PDSCH. In contrast to aperiodic reporting, the ‘type of reporting’ is signalled i instead of ‘reporting mode’. The LTE UE uses combination of ‘type of reporting’ and ‘transmission mode’ to derive the reporting mode.