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Communication transmission system, digital wireless communication transmission system, devices, and method of digital communication

專利號
US10034272B2
公開日期
2018-07-24
申請人
FUJITSU LIMITED（JP Kawasaki）
發(fā)明人
Jianming Wu
IPC分類
H04W72/04; H04L1/18
技術領域
enb,packet,ue,unit,serving,data,reception,in,channel,wireless
地域： Kawasaki-shi, Kanagawa

摘要

A digital communication system including a terminal and a plurality of base stations. The terminal includes receiving of a first control channel which is transmitted only from the first base station, the received first control channel is configured to indicate resource assignment for both data transmitted from the first base station and data coordinately transmitted from the second base station, and is configured to indicate new data or retransmission data. The terminal a second control channel including first control information and second control information only to the first base station. The first control information is channel state information, and the second control information is Hybrid Automatic Repeat reQuest (HARQ) acknowledgement information for the received data coordinately transmitted. The second control information is based on a result of the HARQ process of the received data coordinately transmitted, and the second control channel is transmitted only to the first base station.

說明書

  • Resource block assignment
  • Modulation and coding scheme: 5 bits
  • Precoding information
  • Transmission timing for subframe

    • Described next is the timing control between the X2CCH and the PDCCH.

    The transmission timing control is one of the most important problem for a coordinated transmission. It is determined by the serving eNB, and is instructed by the coordinated eNB through the X2 interface. The transmission timing is determined by considering the latency of the X2 interface.

    FIG. 10 is an example of the transmission timing between a control channel and a data channel. In FIG. 10, the data and the corresponding X2CCH are transferred to the coordinated eNB prior to the relating transmission (“PDCCH” and “Data from S-eNB”) from the serving eNB to the UE with the timing t2. The transmission timing t1 of the data from the coordinated eNB (“Data from C-eNB”) is determined by the serving eNB based on the maximum latency T of the X2 interface. By the synchronous network between the serving eNB and the coordinated eNB, the data from the serving eNB and the data from the coordinated eNB are delivered with predetermined timing t1 and t2. It guarantees the reception of both data with the simultaneous timing t3.

    Including the above-mentioned timing control, the coordinated transmission for each UE is centrally controlled by the serving eNB. The control includes the scheduling of the UE and data, and the transmission timing control.

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