公开(公告)号：EP1125389A1

公开(公告)日：2001-08-22

申请号：EP99958556.5

申请日：1999-10-26

申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ)

发明人： LARSSON, Mikael ,  LARSSON, Peter

IPC分类号： H04L1/18

CPC分类号： H04L1/1877 ,  H04L1/1806 ,  H04L1/1809 ,  H04L1/1841

摘要： Techniques are provided for use with automatic repeat request (ARQ) schemes in a data network to minimize a bandwidth used by a receiver and a transmitter in the network to transfer data packets, by discarding outdated packets that have not yet been successfully transferred. In accordance with an embodiment of the invention, a bit in set in the ARQ packet header to force the receiver to accept packets subsequent to one or more erroneous or unreceived packets that have been discarded and not resent. In accordance with another embodiment of the invention, after data packets have been discarded, sequence numbers are reassigned to the non-discarded data packets that are yet to be sent to the receiver, so that a transmitted stream of the non-discarded packets will have consecutive sequence numbers.

公开(公告)号：EP1018273A2

公开(公告)日：2000-07-12

申请号：EP98951473.2

申请日：1998-09-25

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： LARSSON, Peter

IPC分类号： H04Q3/68 ,  H04Q11/06

CPC分类号： H04Q11/06 ,  H04Q2213/1302 ,  H04Q2213/1304 ,  H04Q2213/13106 ,  H04Q2213/13146 ,  H04Q2213/13166 ,  H04Q2213/13167 ,  H04Q2213/13174 ,  H04Q2213/13292 ,  H04Q2213/1334 ,  H04Q2213/13341 ,  H04Q2213/13393

摘要： Switching device (SM1) in a communication network for transmission of voice and data signals multiplexed using a plurality of time slots. The switching device of the invention comprises space modules and time modules for providing connections between arbitrary time slots on inputs and outputs according to connection requests determined by a control means C. The switching device includes alternate path means for providing a connection on two arbitrary time slots, in case said control means (AP) cannot establish a regular connection via the time modules and the space modules. In a case where blocking occurs, an alternate path using said alternate path means is thus established. Said alternate path means can comprise anti blocking time modules and external devices. The invention allows to reduce hardware costs or to increase load while providing a virtually non-blocking switching device.