Which Protocol Is Responsible For HARQ And Scheduling?

What is PDCP in 5g?

PDCP is located in the Radio Protocol Stack in the UMTS/LTE/5G Air interface on top of the RLC layer.

PDCP provides its services to the RRC and user plane upper layers, e.g.

IP at the UE or to the relay at the base station..

What is LTE frame structure?

In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. Each frame is divided into ten equally sized subframes. The duration of each subframe is 1 ms. Moreover, each subframe is further divided into two equally sized time slots, that is, each slot is 0.5 ms.

What is RRC setup success rate?

RRC Connection Establishment Success Rate: The Radio Resource Control (RRC) protocol connects UE/Clients (CBRS compliant LTE device such as a dongle or a phone) with LTE AP. A RRC connection is successful when an UE performs the call establishment procedure, and get resources from the LTE AP.

Is 4g and LTE is the same?

LTE, sometimes known as 4G LTE, is a type of 4G technology. Short for “Long Term Evolution”, it’s slower than “true” 4G, but significantly faster than 3G, which originally had data rates measured in kilobits per second, rather than megabits per second.

What is TCP in LTE?

One of the implementation of a wireless network is based on mobile broadband technology Long Term Evolution (LTE). … The majority of the Internet connections in the world happen using the TCP (Transmission Control Protocol) due to the TCP’s reliability in transmitting packets in the network.

Which protocol is responsible for encryption of user plane data?

Packet Data Convergence Protocol (PDCP)Packet Data Convergence Protocol (PDCP) layer: which executes IP header compression and packet encryption [3]. Radio Link Control (RLC) layer: which executes packets segmentation and reassembly and Automatic Repeat and reQuest (ARQ) error control procedures.

What is RRC protocol?

The RRC protocol is the signaling exchanged between the mobile and the evolved Node Base station (eNB) over the LTE-Uu radio interface. The RRC protocol performs the following functions: – Broadcast of system information related to the characteristics of the radio interface.

What is RRC layer in LTE?

The Radio Resource Control (RRC) protocol is used in UMTS and LTE on the Air interface. It is a layer that exists between UE and eNB and exists at the IP level (Layer 3/Network Layer). … The operation of the RRC is guided by a state machine which defines certain specific states that a UE may be present in.

What is PDCP SDU?

Packets received by a layer are called Service Data Unit (SDU) while the packet output of a layer is referred to by Protocol Data Unit (PDU). … PDCP Layer submits PDCP PDUs (RLC SDUs) to RLC layer. PDCP Header Compression : PDCP removes IP header (Minimum 20 bytes) from PDU, and adds Token of 1-4 bytes.

What is PDCP throughput?

DL: Throughput of PDCP SDU bits in downlink for packet sizes or data bursts that are large enough to require transmissions to be split across several TTIs, by excluding transmission of the last piece of data in a data burst.

What is layer mapping?

In layer mapping, the modulation symbols for one or two codewords will be mapped onto one or several layers. … In case of spatial multiplexing, there may be one or two code-words. But the number of layers is restricted. On one hand, it should be equal to or more than the number of codewords.

What are LTE protocols?

LTE protocol stack functions consist of the Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Radio Resource Control (RRC). LTE is the latest generation of the 3GPP standards. The LTE standard specifies an IP-only network supporting data rates up to 150 Mbps.

What are layers in LTE?

As defined by 3GPP, LTE Layer 2 structure consists of PDCP/RLC/MAC layers. Transport channels are located between the physical layer and MAC layer. MAC multiplexes RLC links and manages scheduling and priority handling via logical channels. The diagrams below show the structure for the downlink and uplink of Layer 2.

What are LTE protocols & specifications?

The protocol stack functions consist of the Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Radio Resource Control (RRC). LTE is the latest generation of the 3GPP standards. The LTE standard specifies an IP-only network supporting data rates up to 150 Mbps.

What is call flow in LTE?

With Long Term Evolution (LTE) comes a myriad of new and exciting attributes. One of these is the LTE call flow itself. In fact, call flow and signaling is unique for LTE, and is driven by 3GPP standards. Call flow is how signaling and sessions are created across an LTE network.

What is RRC app?

RRC-Nano is an App for Android which makes it possible to remote control Ham radio stations from a Smartphone or other Android devices.

What is the largest channel bandwidth a UE is required to support in LTE?

What is the largest channel bandwidth a UE is required to support in LTE? Explanation: The LTE format was first proposed by NTT DoCoMo of Japan and has been adopted as the international standard. LTE-Advanced accommodates the geographically available spectrum for channels above 20 MHz. 8.

How mapping of channels is achieved with layers in LTE protocol layers?

MAC layer is responsible for Mapping between logical channels and transport channels, Multiplexing of MAC SDUs from one or different logical channels onto transport blocks (TB) to be delivered to the physical layer on transport channels, de multiplexing of MAC SDUs from one or different logical channels from transport …

What is the subcarrier spacing in resource block?

Common resource blocks are numbered from 0 and upwards in the frequency domain for each subcarrier spacing configuration ‘µ’. The CRBs associated with each and every SCS are aligned at Point A i.e., the center of subcarrier#0 of CRB#0 for each subcarrier spacing coincides with Point A.

What are layers in MIMO?

The term “layer” is synonymous with “stream.” For MIMO, at least two layers must be used. Up to four are allowed. The number of layers is always less than or equal to the number of antennas. Precoding modifies the layer signals before transmission.

What is NAS message in LTE?

Non-access stratum (NAS) is a functional layer in the UMTS and LTE wireless telecom protocol stacks between the core network and user equipment. … Examples of NAS messages include Update or Attach messages, Authentication Messages, Service Requests and so forth.