Orthogonal frequency division multiple access (OFDMA): Mobile WiMAX uses OFDM as a multiple-access technique, whereby different users can be allocated different subsets of the OFDM tones. As discussed in detail in Chapter 6, OFDMA facilitates the exploitation of frequency diversity and multiuser diversity to significantly improve the system capacity. Flexible and dynamic per user resource … Read more
Here I write down on How Time Slot Allocation for Uplink and Downlink LTE and How Cyclical Prefix Allocation for LTE Time Slot Allocation for Uplink and Downlink – TDD specific The time division nature of LTE TDD will also require radio engineers to consider how time slots are shared between uplink and downlink based … Read more
UE Capability It is important to remember that the composition and penetration of various UE types will also have an impact on the final achievable cell throughput level. A high concentration of relatively low end UEs will result in low resources utilization efficiency, thereby bringing down the overall cell throughput. This will certainly be depending … Read more
Special Antenna Technologies MIMO and Beam Forming are critical features in determining the actual link budget required for the Operator’s network. However, these two features are also critical features from a capacity perspective as they can also improve the efficiency of frequency reuse and reduce the intra-frequency interference within the same cell as well as … Read more
Here I write on 3GPP Services Classification and EUTRAN Capacity Limiting Factors for LTE. 3GPP Services Classification Being a data centric technology, LTE has well defined classifications for Quality of Service. In general, there are two main classes of service type, with Guaranteed Bit rate vs with Non Guaranteed Bit rate. RT (Real Time) services … Read more
Here I write not all but important List of EUTRAN Capacity Limiting Factors for LTE and its definition. Impact of Interference on Capacity Interference is always a main contributor to capacity degradation in 1G to 3G cellular network and LTE is no difference. Besides external interference, there is a strong relationship also between the number … Read more
Here I write down about How to UE Distribution and Channel Model : Pedestrian vs High Mobility, TDD Specific Uplink and Downlink Configuration and Power Boosting Configuration selection during initial planning of LTE Network and why it needs to take care by radio engineer during LTE network plan. UE Distribution and Channel Model: Pedestrian vs … Read more
Similar to any radio network, standard isolation would be required if equipment from different vendors are to be combined. Which including guard band, filtering as well as vertical/horizontal separation. In addition, indoor DAS (distributed antenna system) may contribute to interference problem particularly on the uplink due to PIM related inter-modulation, over drive of input RF … Read more
Here I write about some small topic for LTE network plan which including Call Model and Smartphone Penetration Growth Considerations, Scheduler Selection, Indoor Coverage Requirement and Cell Edge Throughput Requirement. Considerations of Call Model and Smartphone Penetration Growth for LTE Network Plan The arrival of Smartphone has introduced a whole new trend in data applications … Read more
Subscriber Types Subscriber Equipment may take different form factors. It may resemble alert 3G phones, or maybe a CPE device, or a device connected to a USB dongle or USB port. RF different features, such as different transmission power levels, different Receive diversity schemes, different antenna patterns and gains, it would need Appropriate to perform … Read more