What is a logical channel?
A logical channel is defined by the type of information it carries and is generally classified as a control channel, used for transmission of control and configuration information necessary for operating an LTE system, or as a traffic channel, used for the user data.
How many types of channels are there in Wcdma?
As shown in the figure, there are three types of UMTS channels viz. logical channels(RLC layer), transport channels(MAC layer) and physical channels(PHY layer). As they tranverse between layers they map to other layer frames.
What are the types of logical channel?
There are three types of logical channels: traffic channels (TCHs), control channels (CCHs), and the cell broadcast channel (CBCH).
What is the difference between physical channel and logical channel?
In GSM, these channels are separated into physical channels and logical channels. The Physical channels are determined by the timeslot, whereas the logical channels are determined by the information carried within the physical channel.
What is logical channel group in LTE?
With just a little modification of 3GPP description, LCG can be defined as “A group of Logical Channel which buffer status is being reported.” There are four LCGs being used in LTE and each of the group has it’s own ID from 0 to 3.
What is the minimum spectrum allocation required by Wcdma?
The minimum spectrum allocation required for W-CDMA is 5 MHz.
What are 3G UMTS physical& logical channels?
3G UMTS Logical Channels:
- Broadcast Control Channel (BCCH) (downlink).
- Paging Control Channel (PCCH) (downlink).
- Dedicated Control Channel (DCCH) (up and downlinks) This channel is used to carry dedicated control information in both directions.
- Common Control Channel (CCCH) (up and downlinks).
What is 5g logical channel?
Logical channel: Logical channels can be one of two groups: control channels and traffic channels: Control channels: The control channels are used for the transfer of data from the control plane. Traffic channels: The traffic logical channels are used for the transfer of user plane data.
What is TCH in GSM?
GSM has two types of traffic channels TCH/FS and TCH/HS. It is used both in the uplink and downlink after mobile has established connection with the GSM cell (BTS). It uses 26 frame multi frame structure. TCH/FS stands for traffic channel at Full rate speech and TCH/HS stands for traffic channel at half rate speech.
How many different GSM channels are there?
There are two main types of GSM channels viz. physical channel and logical channel. Physical channel is specified by specific time slot/carrier frequency.
What is logical channel group?
What is the difference between UMTS/WCDMA and WCDMA?
UMTS/WCDMA Logical Channel Function Direction Duplex Mode Dedicated traffic channel(DTCH) carry user plane data (speech/packet data) Uplink(UL)/Downlink(DL) FDD/TDD Dedicated control channel(DCCH) carry signalling messages used for control operations Uplink/Downlink FDD/TDD Shared control channel(SHCCH) carry control messages Uplink/Downlink TDD
What are the logical channels of UMTS?
UMTS logical channels As shown in the figure, UMTS/WCDMA logicalchannels are divided into control channels and traffic channels(DTCH,CTCH).
How is the CDMA signal transmitted?
It is continuously transmitted by each base station on each active CDMA frequency. And, each mobile station tracks this signal continuously. Sync Channel − Synchronization channel carries a single, repeating message, which gives the information about the time and system configuration to the mobile station.
What is the difference between logical and transport channels?
For example logical channels are mapped to transport channels and transport channels are mapped tp physical channels. UMTS logical channels As shown in the figure, UMTS/WCDMA logicalchannels are divided into control channels and traffic channels(DTCH,CTCH).