4g LTE: How to calculate peak data rate in LTE?
Some may say that peak data rate for LTE is 300mbps. How did they arrive at this number? In this chapter we shall make it clear. WKT: 1 frame…
4g LTE: LTE MAC: RACH Contention based and Non-Contention based procedure.
1. Understanding contention based random access procedure. If 2 UE choose the same preamble sequence and send this sequence to eNB at the same…
4g LTE: LTE MAC: Random Access Procedure and RACH
Introduction: RACH stands for Random Access CHannel. UE will perform power on procedure for DL synchronization. UE will perform RACH procedure…
4g LTE: LTE MAC: Scheduling
MAC Scheduler is used to assign bandwidth to UE in uplink and downlink channels. eNB will decide for which UE how many resources to be…
4g LTE: LTE MAC CE: DRX Command
WKT UE will receive downlink data over PDCCH. So UE has to monitor PDCCH everytime to check if there is any downlink data available. By doing…
4g LTE: LCP Logical Channel Prioritization
Before we learn about Logical Channel Prioritization (LCP), we need to learn about channel starvation. Channel Starvation: Before LCP, every…
4g LTE: dlInformationTransfer, ulInformationTransfer and ulDirectTransfer
dlInformationTransfer Direction: eNB => UE Signalling Radio Bearer: SRB2 or SRB1 RLC Mode: AM Logical Channel: DCCH Transport Channel:…
4g LTE: LTE MAC UL CE: BSR
BSR is a MAC UpLink control element. Truncated BSR LCID value is “11100” in binary and 28 in decimal Short BSR LCID value is…
4g LTE: LTE MAC: Understanding MAC PDU
Below is the MAC PDU structure: From the above image we can see that, one MAC PDU has 2 parts 1. MAC Header 2. MAC Payload. Mac Header can…
4g LTE: LTE MAC UL CE: Power Headroom Report
Power Headroom Report (PHR) is a MAC Uplink Control Element. LCID value is “11010” in binary and 26 in decimal * Every UE will…