Patent ID: 8693402
Filing Date: 2014-04-08
Classification: H04W

Abstract:
1. A data transmission method implemented in a time division duplex (TDD) system, comprising: sending, by a radio equipment controller (REC), a first part of downlink data of a downlink period to a radio equipment (RE) before the downlink period arrives; sending, by the REC, a second part of the downlink data of the downlink period to the RE in the downlink period, wherein the second part and the first part constitute all downlink data of the downlink period; receiving, by the RE, the first part and the second part of the downlink data of the downlink period; and sending, by the RE, the first part and the second part as the downlink data through an air interface in the downlink period; wherein the REC sends the second part of the downlink data of the downlink period to the RE through a first Common Public Radio Interface (CPRI) interface, and the REC further receives, through the first CPRI interface, uplink data sent by the RE; wherein sending, by the REC, the first part of the downlink data of the downlink period to the RE before the downlink period arrives comprises: sending, by the REC, the first part of the downlink data of the downlink period to the RE through the first CPRI interface in a previous downlink period; and wherein a transmission time of the first part of the downlink data of the downlink period on the air interface is longer than or equal to a round-trip delay of data transmission on the first CPRI interface, and is shorter than or equal to a transmission time of all downlink data of the downlink period on the air interface.