LTE PUSCH-Physical Uplink Shared Channel
This page describes LTE PUSCH channel or Physical Uplink Shared Channel with respect to LTE system.
This channel is used to carry RRC signalling messages, UCI (uplink Control Information) and application data. Uplink RRC messages are carried using PUSCH. SRB use PUSCH and each and every connection will have its unique SRB.
• LTE PUSCH channel contain user information data.
• The PUSCH carries both user data as well as control signal data. Control information carried can be MIMO related parameters and transport format indicators.
• The control data information is multiplexed with the user information before DFT spreading module in the uplink SC-FDMA physical layer.
• PUSCH supports QPSK,16QAM and 64QAM(optional). The LTE eNodeB selects suitable modulation based on adaptation algorithm.
UCI is transmitted using PUSCH instead of PUCCH when there is RRC and application data to be transferred at the same time instant.
Modulation type is conveyed to UE using PDCCH DCI format-0. This CI also signals RB allocation and TB size. Refer LTE DCI page for contents of various LTE DCI formats.
LTE PUSCH channel uses QPSK when TTI bundling is enabled. If eNodeB directs UE to use 64QAM, but if UE does not support it then 16QAM modulation type is selected.
LTE RELATED LINKS
Difference between SC-FDMA and OFDMA
LTE Cyclic Delay Diversity
LTE eNodeB Physical Layer Measurements
LTE EPC Network Inerfaces
LTE UE Physical Layer Measurements
LTE Bearer types
LTE UE Event Measurement Reporting
LTE RSRP vs RSRQ
LTE Signalling radio bearers
LTE EPS mobility management states
LTE EPS connection management states
LTE UE cell selection
LTE UE PLMN selection
LTE UE Paging Procedure