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Overview of L1 functions( Physical Layer)

Overview of L1 functions( Physical Layer)

The physical layer is expected to perform the following functions to provide the data transport service Error detection on the transport channel and indication to higher layers; FEC encoding/decoding of the transport channel; Hybrid ARQ soft-combining; Rate matching of the coded transport channel to physical channels; Mapping of the coded transport channel onto physical channels;…

Overview of L1 functions( Physical Layer)

Overview of L1 functions( Physical Layer)

The physical layer is expected to perform the following functions to provide the data transport service Error detection on the transport channel and indication to higher layers; FEC encoding/decoding of the transport channel; Hybrid ARQ soft-combining; Rate matching of the coded transport channel to physical channels; Mapping of the coded transport channel onto physical channels;…

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 message) as well as for…

QOS Model

QOS Model

The 5G QoS model is based on QoS Flows. The 5G QoS model supports both QoS Flows that require guaranteed flow bit rate (GBR QoS Flows) QoS Flows that do not require a guaranteed flow bit rate (Non-GBR QoS Flows). The 5G QoS model also supports Reflective QoS

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) • eMBB corresponds to a more or less straightforward evolution of the mobile broadband…