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…
SS/PBCH Time domain Resource Allocation SSB Burst set : All SSBs are transmitted within 5 ms. Maxmimum SSB in Cell is depend upon frequency. Less than 3 GHz band maximum SSB is 4 3 GHz to 6 GHz maximum SSB is 8 greater than 6 GHz maximum SSB is 64. SS Block Periodicity : SSB…
Random Access: Random access required to do uplink synchronization between UE and eNB and gNB. There are 2 types of Random Access Procedure in 5G Network. Contention Based Random Access Contention Based Random access has four-step MSG1 ( UE to gNB or MN-eNB) MSG2 ( gNB to UE) Msg3 (UE to gNB) Ms4 (gNB to…
Main pillar of the NR is a Synchronization Signal and PBCH block (SS/PBCH block). SSB Block contains PSS 2 SSS PBCH In this article , I am going to discuss about PSS. Lets see the PCI formula below. Lets first understand LTE PSS location in sub frame. For FDD frame, PSS is allocated on symbol…
3GPP 3rd generation partnership program5G-GUTI 5G globally unique temporary identity5G-AN 5G access network5GC 5G core network5GMM 5G mobility management5GSM 5G session management5GTF 5G technical Forum5QI 5G QoS identifier AAA Authentication, authorization and acountingACK AcknowledgementAKA Authentication and key agreementAM Acknowledged modeAMBR Aggregate maximum bit rateAMC Adaptive modulation and codingAMD Acknowledge mode dataAMF Access and mobility management…
With the rapid development of mobile Internet and Internet of Things(IoT), Telecom services have been increasingly multifarious. The three main usage scenarios for 5G, namely1. enhanced Mobile Broadband(eMBB) 2. massive Machine Type of Communication(mMTC) 3. ultra-Reliable Low Latency Communication(uRLLC), However, in terms of performance, the current 4G system cannot meet the requirements of high peak…
•The basic idea on RSRP/RSRQ in NR is also similar to LTE RSRP/RSRQ •In LTE, RSRP and RSRQ are based on Cell-specific Reference Signal (CRS). However, in NR there is no CRS •RSRP / RSRQ definition in NR is based on other physical signals as shown in the following table. Category Physical signal for measurement…
Date Rate Throughput defined in 3GPP 38.306(4.1.2) The DL and UL max data rate supported by the UE is calculated by band or band combinations supported by the UE. AUE supporting NR (NR SA, MR-DC) shall support the calculated DL and UL max data rate defined. In NR Data rate calculated based on the resource…
SIB1 contains information relevant when evaluating if a UE is allowed to access a cell and defines the scheduling of other system information. It also contains radio resource configuration information that is common for all UEs and barring information applied to the unified access control. Signalling radio bearer: N/ARLC-SAP: TMLogical channels: BCCHDirection: Network to UE…
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….