Patent ID: 8270321
Filing Date: 2012-09-18
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 when a round-trip delay of data transmission on the first CPRI interface is longer than a round-trip delay of data transmission on the air interface, before the REC sends the first part of the downlink data of the downlink period to the RE through the first CPRI interface in the previous downlink period, the REC compresses the first part of the downlink data of the downlink period to obtain a first part of compressed downlink data.