High business density requirements and limited spectrum resources;

Hard wireless propagation environment;

Complex terrain, features and uneven traffic distribution;

High cost.

Cell system, frequency reuse, high-efficiency speech coding, high-efficiency modulation and demodulation;

FDMA, TDMA, CDMA, OFDM and other multiple access methods;

Diversity, anti-multiple channels, anti-fading, error correction coding, interleaved coding, smart antennas, etc.;

Macro cells, micro cells, pico cells, repeaters, indoor distribution and other means;

Digital maps, propagation models and planning simulation software, test equipment and software;

Clear customer needs;

Determine coverage, capacity and quality goals. Balanced and reasonable goals are the greatest savings;

Arrange in a grid pattern as much as possible; for non-grid arrangements, use non-standard covering patterns;

The key parameter is signal-to-noise ratio rather than field strength;

Threshold - convert customer needs into technical requirements;

Propagation model – convert link budget into distance;

Design each base station well. Achieve coverage and capacity goals without interfering with other base stations;

Specific problems, specific analysis, multiple methods, and local conditions.

Overall goals and sub-goals

Overall tasks and subtasks

Resource allocation

Interface definition

Plan (including schedule, resource allocation, contingency plan and network diagram, etc.)

executive supervision

acceptance

Plan well and then start execution

Correctly grasping the key factors and sensitive factors of tasks and projects is the prerequisite for completing tasks and projects quickly and economically;

Methods to determine key factors and sensitive factors:

Sub-projects, sub-sub-projects... all have key factors and sensitive factors;

Project managers should focus on key factors and sensitive factors during project implementation.

Random sequence mean variance distribution function

confidence confidence interval;

The distribution of sample points can represent the overall shape of the target

Choose sensitive areas

appropriate quantity;

The measured object obeys Poisson distribution, and failure is a small probability event.

Early cutoff method: The cutoff number of failures and the total number of tests are given according to the requirements of confidence level and confidence interval. The test can be terminated when one of the two is reached.

Random mean measurement: gives the number of measurements according to the variance, confidence and confidence interval of the random quantity

Any country, enterprise, or unit has limited resources (manpower, time, money)

Setting reasonable and achievable goals is one of the most important tasks of a leader

Make the goals as reasonable as possible through repeated iterations;

Decompose the goal into sub-goals, sub-sub-goals... and demonstrate their rationality and achievability respectively. If key sub-goals cannot be achieved, the overall goal must be revised

Develop plans for implementing sub-goals, sub-sub-goals...

Projects are implemented by teams, and personnel must perform their own responsibilities;

Function and value: project establishment - feasibility study - preliminary design - construction drawing design - construction - acceptance.

Designing and constructing at the same time is strictly prohibited by the state many times;

Good networks are designed. Design is the basis for optimization and operation and maintenance;

The quality and depth of the design must meet the requirements of construction.

RF design evaluation: implement policies, regulations, standards and specifications;

Reasonable threshold;

Reasonable network topology and network element parameter settings;

Reasonable base station location, antenna, configuration and parameters;

Construction drawings that are complete and deep enough to guide construction;

Complete and accurate estimates and budgets;

Sound economic analysis and evaluation.