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    Welcome to the Cafetele Telecom Training! We’re here to keep you informed about important topics in the world of telecom. If you have any questions or if there’s a specific topic you’d like us to cover, please don’t hesitate to reach out. We value your feedback and would love to hear from you. Stay tuned for regular updates and insightful content from our team. Together, let’s explore the exciting world of telecommunications!

      5G Main Abbreviations

      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

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      July 27, 2020 No Comments

      5G NR CORE Architecture

      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

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      July 27, 2020 No Comments

      5G Measurement

      •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

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      July 26, 2020 No Comments

      5G NR Data Rate (Throughput)

      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

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      July 24, 2020 1 Comment

      5G NR System Information Block1

      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

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      July 22, 2020 1 Comment

      LTE Architecture

      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.

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      July 21, 2020 1 Comment

      User Plane Protocol 5G

      The 5G NR radio access network is comprised of these protocol entities: Service data adaptation protocol (SDAP) Packet data convergence protocol (PDCP) Radio link control (RLC) Medium access control (MAC) Physical layer (PHY)

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      July 21, 2020 No Comments
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