Home / ue

Frequency or RAT Evaluation for LTE UE

E-UTRAN configures a priority for all applicable frequencies for each RAT. In addition to the priorities of specific cells that are optionally provided by SI, E-UTRAN can assign specific EU priorities through dedicated signaling. Since frequencies are indicated in the information system, the EU is expected to take into account only the cell reselection which … Read more

Different Categories of UE in LTE

Different Categories of UE in LTE Categories of UE in LTE is divided by its function which is as per below. Functionality: eNB obtains the UE radio capabilities via: • The S1AP initial setup request message • The X2AP in case of handover • The RRC in any other cases eNB sends the UE radio … Read more

LTE : Data Transmission in DL

LTE : Data Transmission in DL In Long-Term Evolution (LTE), data transmission in the Downlink (DL) involves the transfer of user data from the Evolved NodeB (eNB) to the User Equipment (UE). The LTE DL is designed to provide high data rates, low latency, and efficient spectrum utilization. Here’s an overview of the key aspects … Read more

Establishment and Maintenance of the RRC connection in LTE

Establishment and Maintenance of the RRC connection in LTE In Long-Term Evolution (LTE), the Radio Resource Control (RRC) connection plays a crucial role in establishing and maintaining the communication link between the User Equipment (UE) and the Evolved NodeB (eNB). The process involves several steps: RRC Connection Establishment: Random Access Procedure: The UE initiates communication … Read more

Single and Multiple User MIMO in the Uplink SU MIMO LTE

Single and Multiple User MIMO in the Uplink SU MIMO LTE SU-MIMO is within LTE, but at the time of this writing has not yet been fully identified. To implement the SU-MIMO UE require two transmitters. This is an important problem from the standpoint of cost, size and battery consumption, and for these reasons, SU-MIMO … Read more

How Downlink Control Information or DCI in LTE?

How Downlink Control Information or DCI in LTE? DCI serves as a means of communication from the network infrastructure (eNodeB) to the user equipment (UE), providing essential instructions and information for efficient downlink data transmission. This information includes details about resource allocation, modulation schemes, transmission power control, and more, enabling UEs to accurately decode and … Read more

Purpose of Channelization Code & Scrambling Code in WCDMA

Purpose of Channelization Code & Scrambling Code in WCDMA Channelization Codes in WCDMA: Channelization codes, also known as Walsh codes, serve a critical purpose in WCDMA (Wideband Code Division Multiple Access) networks. These codes are used for the spreading of user data over a wide frequency band, which is a fundamental principle of CDMA-based systems … Read more

State of RRC in LTE

RRC uses the following states: RRC_Idle: •The UE is not connected. There is no radio link. •The network knows that the UE is present on the network and is able to reach it in case of incoming call. •The UE switches in idle mode when it is connected and there is no traffic to save … Read more

How Data Transmission in UL in LTE?

In UL, the UE has no dedicated resources to transmit directly when new data arrived in the buffer from higher layer.  It requests resources to transmit them.  It receives radio resources.  It transmits them.   The scheduling request is sent on the Physical Uplink Control Channel (PUCCH).  This channel carries radio signaling in uplink:  Scheduling … Read more

DL scheduler in LTE

The DL scheduler is spit into 3 functional parts: 1.The Static Scheduler: Which assigns a fixed amount of Transport Blocks as well as PDCCH and PDSCH resources for the BCCH over the DL-SCH Transport Channel.Those resources are permanently allocated. 2.The Semi-static Scheduler: Which assigns Transport Blocks as well as PDCCH and PDSCH resources for PCCH … Read more