Method for dividing edge users and center users in LTE (Long Term Evolution) frequency reuse

Abstract

The present invention discloses a method for dividing edge users and center users in LTE (Long Term Evolution) frequency reuse. The invention mainly aims to solve inaccurate user type division and poor frequency reuse performance in LTE frequency reuse in the prior art. The implementation steps of the method include the following steps that: (1) the frequency bands of LTE sectors are divided; (2)the location areas of the LTE sectors are divided; (3) parameters are configured; (4) UE (user equipment) sends an uplink PRACH preamble; (5) a service sector calculates the uplink propagation time t0(k) of the PRACH preamble of the UE; (6) user types are judged primarily on the basis of the uplink propagation time t0 (k); (7) UE types during service transmission are dynamically updated; and (8)the service sector allocates broadband resources. With the method of the present invention adopted, the accuracy of the division of the edge users and center users in the frequency reuse can be improved, and the performance of the LTE frequency reuse is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for dividing edge users and central users in LTE frequency reuse, which can be used in FFR (Fractional frequency reuse) and soft frequency reuse (SFR) in LTE system interference coordination. Frequency Reuse) user classification to improve the performance of LTE frequency reuse. Background technique [0002] With the rapid growth of smartphone users, the demand for mobile data traffic is also increasing. LTE, as a new generation of mobile communication network, adopts OFDM-MIMO technology to greatly meet the growing demand for mobile data traffic. At the same time, mobile communication operations In order to maximize the use of the extremely scarce spectrum resources to meet the user's mobile traffic requirements, the LTE cellular cell networking mode tends to be a networking mode with a reuse factor of 1. However, in this networking mode, strong interfer...

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Problems solved by technology

Therefore, the accuracy of the distance calculation based on the TA of the user UE is relatively high, but the calculation of the angle of arrival AOA (Angel Of Arrival) has nothing to do with the number of uplink receiving antennas in the LTE service sector, the calculation accuracy of the chip corresponding to the LTE service sector, and the distance between the user UE and the Whether there is a direct path LOS (line of sight) between LTE service sectors is related. Therefore, especially in urban environments with rich multipaths, that is, under the condition of lack of direct path LOS or insufficient number of uplink receiving antennas in LTE service sectors, the calculation The accuracy of the angle-of-arrival AOA obtained is not high, and it cannot be directly used for user type division in LTE frequency reuse, and cannot achieve the purpose of improving LTE frequency reuse performance

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