What is CCE in Pdcch?
The E-UTRA CCE is a group of resources which can be used to send a PDCCH (Physical Downlink Control Channel). One, two, four or eight CCEs can be grouped to support larger messages. Each CCE consists of 9 REGs (Resource Element Group).
What is Pdcch channel in LTE?
PDCCH (Physical Downlink Control Channel) PDCCH is a physical channel that carries downlink control information (DCI) and it has characteristics as described below. Mapped to the first L OFDM symbols in every downlink subframe. Number of the symbols (L) for PDCCH can be 1,2, or 3. (
What is CCE in 5G NR?
Control Channel Element(CCE): A CCE is a combination of multiple REGs. The number REG bundles within a CCE varies. Aggregation Level: Aggregation Level indicates the number of CCEs allocated for a PDCCH. Aggregation Level and the number of allocated CCE is defined in following table.
What is the difference between Pdcch and Pdsch?
The PDCCH is used for control information while the PDSCH carries the actual data. For example, if the UE has data in the PDSCH, it needs to know where the data is located. The PDCCH will tell the UE that the data it is looking for is located at this location on PDSCH.
What is Pdcch order?
PDCCH Order is a mechanism by which eNB force UE to initiate PRACH. As you know, one of the most important purpose of RACH is to let UE obtain the synchronization with network and establish the iniitial connection pipe. In most case, the decision to initiate (trigger) PRACH is done by UE side.
What are Pdcch candidates?
All the possible location for PDCCH is called ‘Search Space and each of the possible location is called ‘PDCCH Candidates’. The search space indicates the set of CCE locations where the UE may find its PDCCHs. Each PDCCH carries one DCI and is identified by RNTI.
What is Pdcch used for?
The Physical Downlink Control Channel (PDCCH) is primarily used to carry scheduling information to individual UEs, i.e., resource assignments for uplink and downlink data and control information. The PDCCH is located in the first few OFDM symbols of a subframe.
What is Pdcch blind decoding?
Blind Decoding Using DCI Search The UE is only informed of the number of OFDM symbols within the control region of a subframe and is not provided with the location of its corresponding PDCCH. The UE finds its PDCCH by monitoring a set of PDCCH candidates in every subframe. This is referred to as blind decoding.
What is Rach preamble in LTE?
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 prach mask index in LTE?
The PRACH mask index identifies which PRACH resources the UE is allowed to use for its access attempt (see 36.32, section 7.3). More specifically, the mask defines in whichPRACH (or PRACHs) within a frame a UE can transmit a Random Access Preamble.
What is Pdcch candidate?
