Transmitting method for station address selecting down diversification

Abstract

The present invention discloses station site selection downlink diversity transmitting method. It contains radio network controller monitoring UE all soft switching subcircuit uplink quality, and judging optima switching subcircuit as current optima switching subcircuit; if current optima soft switching subcircuit generating variation, radio network controller starting up new optima soft switching subcircuit downlink transmission. The present invention can completely ensure station site selection relevant information reliable and timely transmission, avoiding unmerited initial code domain transmitting power configuration resulted down link transmission performance undulation and loss.

Description

technical field [0001] The invention relates to a downlink diversity transmitting method in the field of wireless communication, in particular to a network-side controlled site selection downlink diversity transmitting method. Background technique [0002] WCDMA is a mainstream technology of the third generation mobile communication (3rd Generation, referred to as "3G"), it is developed by the 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as "3GPP"), there are currently four versions, Namely R99, R4, R5 and R6. [0003] In a WCDMA system, site selection diversity transmit (SSDT for short) is a method of downlink transmit diversity, and is also a standard transmit diversity method of 3GPP. The principle of this method is as follows: the radio network controller assigns cell numbers corresponding to all soft handover branches of the UE (terminal equipment), and the UE monitors the downlink signal quality of all soft handover branches (the...

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Problems solved by technology

[0005] 1. The UE sends the relevant information for determining the site address to the base station through the wireless air interface. The transmission method adopted has no error correction and retransmission mechanism, and the wireless physical layer transmission itself is unreliable, which makes it difficult for the base station to ensure reliable station access. site selection information, which increases the probability of site selection diversity failure, and the UE's downlink transmission performance will deteriorate as a result

[0006] 2. If the new optimal soft handover branch and the original optimal soft handover branch do not belong to the same base station, the base station cannot obtain the reference value of the current code domain transmission power of the UE, so the initial code domain set when starting the transmission There is a large randomness in the transmission power. If the power is too high, additional downlink interference will be introduced. If the power is too low, the downlink bit error will increase, which will reduce the downlink transmission performance.

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