VOLTE COVERAGE IMPROVEMENT Optimization Feature TTI Bundling TTI bundling is specified in 3GPP (TS 36.213, 36.321) to allow the improved uplink performance for cell border UEs (which often hit the maximum transmission power) and for reduced PDCCH load.
LTE Downlink Channels Physical Downlink Shared Channel (PDSCH) Carries the DL-SCH and PCH. DL-SCH contains actual user data. Physical Downlink Control Channel (PDCCH) Informs the UE about the resource allocation of PCH and DL-SCH, and HARQ information related to DL-SCH. Carries the uplink scheduling grant. Physical HARQ Indicator Channel (PHICH) Carries ACK/NACKs in response to…
First we have to understand what is SIP ? In an IMS network, Session Initiation Protocol (SIP) messages are exchanged between UEs using signaling PDP contexts through the PS domain of the LTEnetwork. Similarly, media streams (voice/video) are transmitted using media PDP contexts. Like common interactive PDP contexts, media PDP contexts do not require special…
VOLTE: VOICE OVER LTE VoIP call support over an LTE network requires IMS support. When a UE with an active VoIP call leaves LTE coverage to an area with only 1xRTT coverage, the call can be seamlessly handed over from the LTE-IMS to the 1xRTT CS domain. Call continuity from IMS to the CS domain…
LTE Architecture : LTE network can be considered of two main components: RAN and EPC RAN: Ran includes LTE radio protocol stacks ( RLC, PDCP, RLC, MAC, Physical) when they are connected to EPC core. LTE Radio Protocol stacks new ( SDAP, PDCP, RLC, MAC, Physical, RRC) when they are connected to 5G Core Network….
System Information Block System information is divided into the MasterInformationBlock (MIB) and a number of SystemInformationBlocks (SIBs). System Information Blocks in LTE, SIBs carry relevant information for the UE, which helps UE to access a cell, perform cell re-selection, information related to INTRA-frequency, INTER-frequency, and INTER-RAT cell selections. In LTE there are 13 types of…
SON (Self Organizing Network) solutions can be divide into three categories: Self-Configuration. Self-optimisation Self-Healing The SON architecture can be a centralize, distribute or a hybrid solution. SELF-CONFIGURATION: This is the dynamic plug-and-play configuration of newly deployed eNBs. The eNB will by itself configure the Physical Cell Identity, transmission frequency, and power, leading to faster cell…
SON (Self Organizing Network) solutions can be divide into three categories: Self-Configuration. Self-optimisation Self-Healing The SON architecture can be a centralize, distribute or a hybrid solution. SELF-CONFIGURATION: This is the dynamic plug-and-play configuration of newly deployed eNBs. The eNB will by itself configure the Physical Cell Identity, transmission frequency, and power, leading to faster cell…