Abhijeet Kumar

5G MAC Protocol

Medium Access Control (MAC) protocol specification written in (3GPP TS 38.321).     MAC is a protocol layer above the physical layer and below the RLC layer. The ‘Medium Access Control’ (MAC) layer receives both the user plane and control plane data from the set of logical channels provided by…

5G NR Initial Access

5G NR Initial Access

How 5G NR initial Cell Search process work? For the initial access case (idle mode), the UE should start by the cell search procedure. By using the PSS, SSS, and specific synchronization algorithms, the UE can estimate and correct the frequency and time offsets.    Cell Search The UE searches...
5G NR  Protocol Test

5G NR Protocol Test

CafeTele 5G NR QUIZ Test, Participate in the 5G NR QUIZ and feedback us about your experience with the CafeTele Quiz segment.     Check some other Quiz from Cafetele https://cafetele.com/quiz-5g-nr-architecture/

LTE Channel

LTE Channel

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)…

VOLTE SIP Message

VOLTE SIP Message

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…

VOLTE Architecture

VOLTE Architecture

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…

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