Jumat, 01 November 2019

4G LTE Dimensioning Essentials Coverage, Capacity and Baseband

4G LTE Dimensioning Essentials Coverage, Capacity and Baseband

Existing WCDMA/HSPA 2.1 GHz grids can be reused for LTE deployment at 2.1 GHz
Existing WCDMA/HSPA 2.1 GHz grids can be reused for LTE deployment at 2.6 GHz
Existing GSM 1.8 GHz can be reused for LTE deployment at 2.1 GHz
LTE Voice provides same coverage as GSM Voice but offers much higher spectrum efficiency (#simultaneous users) (tbd)
LTE Voice provides same coverage as HSPA Voice
LTE TDD loses ~2..3dB compared to FDD due to sharing resources in time
Beamforming does not bring significant coverage gain however results in capacity boost (tbd)
LTE deployment at Digital Dividend band provides extreme coverage and makes difference for PRACH planning
Typical LTE Link Budget depending on the feature set is about 160..165dB maximum allowable path loss usually limited by uplink coverage
Baseband is not likely to be a limiting factor in LTE dimensioning
Control channels are not likely to limit LTE coverage
Spectral Efficiency depends on many factors & assumptions
LTE DL Spectral Efficiency is ~1.8 bps/Hz (3..4 times reference HSPA Release 6)
LTE UL Spectral Efficiency is ~0.7 bps/Hz (2..3 times reference HSPA Release 6)
LTE 6-sector site solution reduces the number of coverage sites by ~35%
LTE 6-sector site solution brings ~80% site throughput gain compared to 3-sector
LTE dimensioning & planning tools provide consistent path from simple link budget and capacity estimation to topology-aware network evaluation

How to make LTE Link Budget more aggressive within reasonable range of changes?
How to make LTE Capacity more aggressive within reasonable range of changes? (tbd)

Tidak ada komentar:

Posting Komentar

My Headlines