Preamble received target power configuration method, device and base station

Abstract

The invention provides a preamble received target power configuration method which comprises the following steps: S21, obtaining the IOT (Interference over Thermal) of an upstream subframe in a PRACH (Physical Random Access Channel) from a physical layer; S22, obtaining the static configuration preamble received target power; and S23, calculating the preamble received target power value used for reconfiguration according to the static configuration preamble received target power and the IOT value of the upstream subframe. According to the invention, the preamble received target power of a UE (user equipment) is dynamically adjusted based on the IOT during the reconfiguration process, so that the preamble received target power is reasonable to further inhibit the influence of the upstream interference on the preamble; and therefore, the preamble can be quickly and successfully detected by an eNB (evolved Node B), the success ratio of reconfiguration is improved, and the reconfiguration delay is reduced.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a method, a device and a base station for configuring a preamble expected receiving power. Background technique [0002] The air interface signaling process of LTE (Long Term Evolution, long-term evolution) cell handover is as follows: figure 1 As shown, regardless of whether it is based on the S1 interface or the X2 interface, the handover process on the air interface is the same. [0003] During the handover process, when the UE (User Equipment, user terminal) receives the handover command RRCConnectionReconfiguration and starts handover to the target cell, it must first complete the random access process in the target cell before successfully handing over to the target cell. The random access process includes a contention-based random access process and a non-contention random access process. The difference between the two lies in whether the base sta...

AI Technical Summary

Problems solved by technology

[0011] The existing solution does not consider the uplink interference level (IOT, Interference over Thermal) of the random access target cell. The UE calculates and transmits the Preamble transmission power according to the configured Preamble expected reception power. Due to the existence of uplink interference, the eNB (evolved Node B, evolved base station) The signal-to-noise ratio detected on the Prach channel is low, so that during the UE handover process, the eNB may not be able to successfully detect the Preamble code, resulting in handover failure, or even after multiple Preamble retransmissions, the handover is finally successful, but resulting in The handover delay increases, which affects service perception, and may cause subsequent process failure due to the large delay in the random access process, resulting in handover failure, which leads to a decrease in the handover success rate index

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