Abstract: In LTE (Long Term Evolution) systems, the PRB (Physical Resource Block) usage ratio is considered importantly to manage the QoS (Quality of Service) of LTE traffic. As the PRB usage ratio increases, the resource may not be allocated in a timely and reliable manner to the users of the cell.
What is DL PRB utilization in LTE?
A recurring topic in LTE radio planning pertains to the maximum acceptable LTE radio interface load, up to which a targeted user data rate can be maintained. We explore this topic by using Queuing Theory elements to express the downlink user throughput as a function of the LTE Physical Resource Block (PRB) utilization.
What is high PRB utilization?
One of factors that may annoy any customer is high PRB utilization that any cell have been reached in range greater than 85% up to maximum 97% in BH interval that they always ask about way forward to compensate this behavior.
How does LTE calculate PRB?
Physical Resource Block (PRB) = 2*Resource Block = 12 Subcarriers x 14 OFDM in 1ms. RE can deliver 2, 4, 6, 8 bits in QPSK, 16QAM, 64QAM, 256QAM respectively. If we calculate for 64QAM as 6bits since 256QAM not widely spread (check Samsung S7 in T-Mobile). 20MHz ==> 100 PRB ==> 100*168*1000 = 16,800,000 RE in 1 s.
How increase IP throughput in LTE?
One thing that can really help in increasing the throughput is the optimum mobility strategy. Consider two LTE layers, for instance L800 and L1800 with same bandwidth. In this case, L800 will have a higher coverage as it is a lower frequency. So, the user count on L800 will be higher compared to L1800.
What is PRB in 5G?
A E-UTRA PRB (Physical Resource Block) is defined as consisting of 12 consecutive subcarriers for one slot (0.5 ms). A PRB is the smallest element of resource allocation assigned by the eNB scheduler.
What is resource block in 5G?
resource block in 5g. 5G NR is 12 consecutive subcarriers in the frequency domain. A resource block (RBResource Block) is the smallest unit of resources that can be allocated to a user.
What is RB utilization?
RB Utilization evaluates the proportion of total used RBs to total RBs in each cell and describes the current load state of the cell. A higher RB Utilization indicates a higher saturated state the cell becomes; therefore a cell reselection needs to be considered when more UEs are going to be handed over to this cell.
How does LTE TDD work?
TDD technology uses a single channel and a timed signal to separate uploads and downloads. FDD systems have two channels of paired spectrum separated with a guard band for uploads and downloads. Advocates of TDD technology suggest that the single channel makes the network more bandwidth-efficient.