Find Your Focus What is RIC(Ran Intelligent Controller)? Near-RT RIC(O-RAN Near-Real-Time RAN Intelligent Controller: A logical function that enables near-real-time control and optimization of RAN elements and resources via fine-grained data collection and actions over E2 interface.) Non-RT RIC(O-RAN Non-Real-Time RAN Intelligent Controller: A logical function within SMO that drives the content carried across the…
Find Your Focus O-RAN Architecture Principle The O-RAN architecture and interface specifications shall be consistent with the 3GPP architecture and interface specifications to the extent possible. The architecture shows that the four key interfaces – namely, A1, O1, Open Fronthaul M-plane & O2– connect SMO (Service Management and Orchestration)framework to O-RAN network functions and O-Cloud….
NR & LTE implements PDCP in both the User Plane and Control Plane. This is unlike UMTS, where PDCP was only found in the User Plane. The main reason for the difference is that PDCP in NR & LTE takes on the role of security, i.e. encryption and integrity.
Find Your Focus Dynamic Spectrum Sharing (DSS) allows operating LTE and NR networks in the same frequency bands. Dynamic Spectrum Sharing (DSS) is useful to allow operators to perform a soft refarming of the LTE spectrum towards NR. For Dynamic Spectrum Sharing support between LTE and NR in TDD bands. Some operators do not possess…
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 the RLC layer. Multiplexes and…
N26 interface is an inter-CN interface between the MME and 5GS AMF in order to enable interworking between EPC and the NG core. Support of the N26 interface in the network is optional for interworking. N26 supports a subset of the functionalities (essential for interworking) that are supported over S10. PGW-C + SMF and…
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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…
Multi-Radio Dual Connectivity: Multi-Radio Dual Connectivity (MR-DC) is a generalization of the Intra-E-UTRA Dual Connectivity (DC) described in TS 36.300 [2], where a multiple Rx/Tx capable UE may be configured to utilize resources provided by two different nodes connected via non-ideal backhaul, one providing NR access and the other one providing either E-UTRA or NR…
Radio Protocol Architecture 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) To meet the desired key capabilities of 5G NR, the other layers of the stack provide various enhancements over…