nr

DSS – Dynamic Spectrum Sharing 5G-LTE

DSS – Dynamic Spectrum Sharing 5G-LTE

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…

5G NR CORE Architecture

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…

5G NR Data Rate (Throughput)

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…

5G NR Frame Structure

5G NR Frame Structure

Frame Structure 5G-NR In NR, similar to LTE, a radio frame is fixed to be 10 ms, which consists of 10 subframes each of 1ms. However, different from LTE which has a fixed subcarrier spacing (SCS) for 15 kHz, NR supports scalable numerology for more flexible deployments covering a wide…

MIB : Master Information Block

MIB : Master Information Block

Master Information Block Direction: gnB=> UE Signalling Radio Bearer: N/A RLC-SAP: TM Logical Channel: BCCH Transport Channel: BCH The MASTER INFORMATION BLOCK (MIB) includes a limited number of most essential and most frequently transmitted parameters that are needed to acquire other information from the cell. The MIB is transmitted on BCH while all other SYSTEM INFORMATION messages are transmitted on DL-SCH The MIB is…

DFT-s-OFDM Signal Model

DFT-s-OFDM Signal Model

In the current NR specifications [2], [3], Discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-s-OFDM) [14] is used for the uplink transmission, especially in coverage limited scenarios. This waveform is also referred to as single-carrier FDM waveform (SCFDM) in the literature. In 3GPP 5G NR, QAM modulation symbols with modulation order…

Signaling radio bearers

Signaling radio bearers

Signaling Radio Bearers (SRBs) are defined as Radio Bearers (RBs) that are used only for the transmission of RRC and NAS messages. More specifically, the following SRBs are defined: SRB0 is for RRC messages using the CCCH logical channel. SRB1 is for RRC messages (which may include a piggybacked NAS…

What is 5G?

What is 5G?

5G has been introduced within the release 15 version of the 3GPP specifications.  5G has been specified based upon the requirements of the following use cases: Enhanced Mobile Broadband (eMBB) Ultra-Reliable and Low Latency Communications (URLLC) Massive Machine Type Communications (mMTC)

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