公开(公告)号：EP0775394A1

公开(公告)日：1997-05-28

申请号：EP95914426.0

申请日：1995-03-27

Applicant: ALCATEL CIT

Inventor： DE SEZE, Fabrice ,  DELPRAT, Marc ,  MOUROT, Christophe

IPC: H04B7 ,  H04W28

CPC classification number: H04B7/2656

Abstract: An air interface adapting method for a mobile radio system transmitting frames between at least one mobile station and at least one base station, each frame consisting of N time intervals. A data packet may be transmitted in each time interval and each time interval is associated with a separate communication between a mobile station and a base station. The method comprises analysing (62, 66) the transmission channel quality for each communication via a transmission channel, and, on the basis of the analysis, selecting (64, 68) either a first transmission mode, in which the data to be transmitted is arranged in first blocks resulting from a first source block encoding process, the size of each of the first blocks being greater than the capacity of (P-1) packets, where P is an even number of at least two, and the data in a single first block being distributed between at least P packets of a packet; or a second transmission mode, in which the data to be transmitted is arranged in second blocks each having a size no greater than the capacity of P/2 packets, the data in a single second block being distributed between no more than P/2 packets, and at least P/2 packets being available relative to the first transmission mode, and in which an automatic retransmission request mechanism is used to repeat the transmission in said available packets of the second blocks for which poor reception has been sensed, said second transmission mode requiring a higher transmission channel quality than said first transmission mode.

公开(公告)号：EP0755615A1

公开(公告)日：1997-01-29

申请号：EP95916725.0

申请日：1995-04-07

Applicant: ALCATEL CIT

Inventor： LE STRAT, Evelyne ,  DELPRAT, Marc

IPC: H04B7 ,  H04B17 ,  H04L1 ,  H04L29 ,  H04W28 ,  H04W72 ,  H04W12 ,  H04W24

CPC classification number: H04W28/06 ,  H04B17/20 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0015 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/203 ,  H04W24/00

Abstract: The invention relates to a method for adapting the air interface in a radiocommunication system towards mobiles so as to provide for bidirectional digital signal exchanges between at least one mobile and at least one base station, said system providing at least two coding modes (93M, 93D), each mode corresponding to a predetermined source coding and channel coding for the transmission of a useful signal, for each transmission direction, each source coding corresponding to a given useful flow rate, and each channel coding corresponding to a given coding yield, and therefore to a given total flow rate, for a given source coding; during a communication between a mobile and a base station, two distinct analyses of the transmission quality are carried out, for each transmission direction respectively, and for each of said transmission directions, one of said coding modes (92M, 92D) is selected as a function of the corresponding analysis of the transmission quality.

Abstract translation: 该方法涉及使用两种不同的编码模式。 每个模式对应于用于在每个发送方向上发送信号的预定编码源和编码信道。 每个编码源对应于数据流，每个编码信道对应于用于编码源数据的总数据流的编码数据输出。 分析移动单元与基站在各个方向的传输质量。 对于每个方向，根据传输质量的分析来选择编码模式之一。