PDCCH power allocation overflow control method and system

Abstract

The invention proposes a PDCCH power allocation overflow control method and system. The method comprises the following steps: calculating the number of residual power corresponding to each OFDM symbol, according to an AL value, calculating the number of REG allocated to a UE PDCCH, determining the number of search spaces and the size of the search spaces, and performing CCE allocation; and for the allocated CCE, comparing with a set target according to an equivalent SINR value, correspondingly adjusting the value of a PDCCH EPRE, determining the transmission power OSTP of each OFDM symbol, judging whether the transmission power OSTP is less than or equal to each OSTP residual power, if yes, then power allocation is successful, and if not, then power overflows, and reducing one level for the AL value. According to the PDCCH power allocation overflow control method provided by the invention, in the PDCCH power allocation process, static allocation is combined with adaptive power allocation; and when power overflows, the AL is gradually reduced to ensure that each OSTP does not overflow, ensure successful PDCCH scheduling, and improve the resource utilization rate.

Description

technical field [0001] The invention relates to the field of mobile communication, and relates to a PDCCH power allocation overflow control method and system. Background technique [0002] In the downlink transmission of the LTE system, the size of the EPRE is determined by the eNode B, and the physical layer of the eNode B side configures the corresponding power for each RE to send data to the UE according to the power allocation result. In an actual system, there is a maximum limit on OFDM symbol transmission power (OSTP). When the eNode B side allocates power to REs on each OFDM symbol, the total power of all REs cannot exceed this maximum value. [0003] In PDCCH power allocation, a combination of static configuration and PDCCH power adaptive allocation is adopted. [0004] When performing static power configuration, OAM determines the DownlinkReference-signal power EPRE according to the system bandwidth and coverage requirements. This parameter indicates the power of e...

AI Technical Summary

Problems solved by technology

Then after the power adaptive parameter is adjusted, there is still a UE whose PDCCH power allocation exceeds the limit of the maximum value of OSTP, that is, power overflow, and the UE cannot successfully allocate CCEs, resulting in PDCCH scheduling failure, and the remaining power of the base station is not used. Make full use of it, causing waste of resources

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