What is a channel in LTE?
What is a channel in LTE?
What is a Channel in LTE? The information flows between the different protocols layers are known as channels. These are used to segregate the different types of data and allow them to be transported across different layers.
How many channels are there in LTE?
3.3. The MAC layer uses the services offered by the physical layer in terms of using the transport channels. The LTE transport channels are: Broadcast Channel (BCH), Downlink Shared Channel (DL-SCH), Paging Channel (PCH), Multicast Channel (MCH), Uplink Shared Channel (UL-SCH), and Random Access Channel (RACH).
What is the purpose of transport channels in LTE?
Transport channels: The physical layer transport channels offer information transfer to Medium Access Control (MAC) and higher layers. Logical channels: Provide services for the Medium Access Control (MAC) layer within the LTE protocol structure.
How does LTE communication channels work?
The information flows between the different protocols are known as channels and signals. Transport Channels : Define howis something transmitted over the air, e.g. what are encoding, interleaving options used to transmit data. …
What is LTE Rach procedure?
Two types of RACH process : Contention-based and Contention-free. When a UE transmit a PRACH Preamble, it transmits with a specific pattern and this specific pattern is called a “Signature”. In each LTE cell, total 64 preamble signatures are available and UE select randomly one of these signatures.
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 LTE Phich?
PHICH stands for Physical HARQ Indicator Channel and it goes on Downlink. PHICH is a control channel on LTE downlink, that is used to indicate the reception of PUSCH transmission from a mobile/UE. The PHICH indicates either a ACK or a NACK, which the UE will decode to find out if it has to do a retransmission or not.
What mean LTE?
Long Term Evolution
LTE stands for Long Term Evolution. It’s a term used for the particular type of 4G that delivers the fastest mobile Internet experience. You’ll usually see it called 4G LTE. Using a 4G smartphone on Verizon’s 4G LTE network means you can download files from the Internet up to 10 times faster than with 3G.
What are physical channels in LTE?
Physical channels: These are transmission channels that carry user data and control messages. Logical channels: Provide services for the Medium Access Control (MAC) layer within the LTE protocol structure.
How does LTE stuff work?
The LTE network is based on Internet Protocol (IP) standards, the kind that delivers Web pages to your computer, and adds voice data to the transmission streams [source: 4G Americas]. It uses a schematic called OFDMA, or Orthogonal Frequency Division Multiple Access, which is similar to the OFDM approach in WiMAX.
Why does LTE need Rach?
For sure, it is not for confusing you :), RACH has very important functionality especially in LTE (and in WCDMA as well). Another purpose of RACH process is to obtain the resource for Msg3 (Message 3). RRC Connection Request is one example of Msg3 and there are several different types of Msg3 depending on situation.
What is the LTE physical downlink shared channel?
LTE PDSCH channel-Physical Downlink Shared Channel. This page describes LTE PDSCH channel or Physical Downlink Shared Channel with respect to LTE system. The PDSCH channel is the main data bearing channel which is allocated to users on a dynamic and opportunistic basis. The PDCH is also used to transmit broadcast information not transmitted…
How are physical channels used in LTE network?
The following list describes LTE downlink physical channels and physical signals. Downlink physical channels carry layer 2 information but downlink physical signals are only used by the physical layer. Carries the DL-SCH and PCH. DL-SCH contains actual user data.
Which is LTE transport channel carries bcch.2?
This LTE transport channel maps to Broadcast Control Channel (BCCH). It carries BCCH. 2. Downlink Shared Channel (DL-SCH): This transport channel is the main channel for downlink data transfer. It is used by many logical channels like BCCH, CCCH, DCCH DTCH,MCCH,MTCH and send its information to Physical Downlink Shared Channel (PDSCH).
What is the PDCH channel used for in LTE?
The PDCH is also used to transmit broadcast information not transmitted on the PBCH which include System Information Blocks (SIB) and paging & RRC signalling messages. PDSCH is also used to transfer application data. Refer LTE MIB and SIB page for MIB and SIB description. • Paging messages-These are broadcast using PDSCH channel.