What are three channel types that are used in UMTS?
The 3G UMTS transport channels include:
- Dedicated Transport Channel (DCH) (up and downlink).
- Broadcast Channel (BCH) (downlink).
- Forward Access Channel (FACH) (down link).
- Paging Channel (PCH) (downlink).
- Random Access Channel (RACH) (uplink).
- Uplink Common Packet Channel (CPCH) (uplink).
What are logical channels?
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.
What are logical transport and physical channels?
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.
What is UMTS architecture?
UMTS system uses the same core network as the GPRS and uses entirely new radio interface. The new radio network in UMTS is called UTRAN (UMTS Terrestrial Radio Access Network) and is connected to the core network (CN) of GPRS via Iu interface.
What is the difference between physical channel and logical channel?
The Physical channels are determined by the timeslot, whereas the logical channels are determined by the information carried within the physical channel. It can be further summarised by saying that several recurring timeslots on a carrier constitute a physical channel.
What is 5g logical channel?
A logical channel is defined by the type of information it carry and is generally differentiated as a control channel, used for transmission of control and configuration information or as a traffic channel used for the user data.
What are the physical channels?
Physical channels correspond to sets of time-frequency resources used for transmission of particular transport channel data, control information, or indicator information. Each transport channel is mapped to a corresponding physical channel.
What is the purpose of UMTS?
Objectives of UMTS High frequency spectrum efficiency. Integration of multiple networks such as terrestrial, satellite and indoor networks in a single system and one user equipment with low cost. Seamless and global radio coverage. Quality of service (QoS) comparable to current fixed networks.
What are the types of UMTS channels?
As shown in the figure, there are three types of UMTS channels viz. logical channels(RLC layer), transportchannels(MAC layer) and physicalchannels(PHY layer). As they tranverse between layers they map to other layer frames. For example logical channels are mapped to transport channels and transport channels are mapped tp physical channels.
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).
What is UMTS (universal mobile telecommunications system)?
UMTS stands for Universal Mobile Telecommunications System. It came into existence from GSM technology developed by 3GPP. UMTS network composed of three main parts UE (User Equipment), Radio Access Network (RAN) and Core Network. UMTS is released in several phases by 3GPP standard body as shown below. UMTS is also referred by 3G.
Who developed UMTS technology?
It came into existence from GSM technology developed by 3GPP. UMTS network composed of three main parts UE (User Equipment), Radio Access Network (RAN) and Core Network. UMTS is released in several phases by 3GPP standard body as shown below.