摘要:
In order to be able to use a smaller routing table (4) and, thus, to reduce the costs and power consumption and to improve the performance of an IP router, it is proposed to extract a destination address identifier (ADR) from a data packet to be forwarded by the IP router, compress the extracted destination address identifier (ADR) by using a lossless data compression algorithm, and compare the compressed destination address identifier with entries stored in the routing table (4) so as to find a correspondence between the destination address identifier and one of the entries of the routing table (4). Each entry of the routing table (4) corresponds to a possible or available forwarding address of the IP router, the forwarding addresses having been compressed with the same data compression algorithm as the destination address identifier. After having found a correspondence between the destination address identifier and one of the compressed forwarding addresses stored in the routing table (4), a switch (6) of the IP router switches the respective data packet to one of its output links (OUT) which is associated with the respective forwarding address matching the destination address identifier (ADR).
摘要:
A method and a programmable unit for bit field shifting in a memory device in a programmable unit as a result of the execution of an instruction, in which a bit segment is shifted within a first memory unit to a second memory unit, are presented. The bit segment is read with a first bit length from a first bit field in the first memory unit starting at a first start point. The bit segment that has been read is stored in the first bit field in the second memory unit starting at a second start point. The first or the second start points is updated by a predetermined value and the updated start point is stored for subsequent method steps.
摘要:
A method for timing the output of data packets from network nodes, in which the current fill level of the buffer memory of a queue of the network node is first determined. The determined fill level of the buffer memory is compared with a predetermined lower limit for the fill level of the buffer memory. The output time of a data packet is assigned in dependence on the result of the comparison.
摘要:
The invention relates to a method for changing the image size of video images, in which a decimation of video image signals (V) by an integral decimation factor (MHD, MVD) is carried out, and the decimated video image signals are subsequently read into an image memory for buffering.In order to achieve better possibilities of adjusting the image reduction with a relatively low outlay and high image quality, a fine decimation of the video image signals (V) is additionally carried out before buffering by a fine decimation factor (SHS, SVS) which can be adjusted to non-integral values, and a total decimation factor (MH, MV) relevant to the decimation of the video image signals (V) is formed from the integral decimation factor (MHD, MVD) and the fine decimation factor (SHS, SVS).
摘要:
The invention relates to a heterogeneous parallel multithread processor (1) with shared contexts which has a plurality (M) of parallel-connected standard processor root unit types (2p; pε[1, . . . , M]), where each respective standard processor root unit type (2p) has at least one or more (K) parallel-connected standard processor root units (2pq; qε[1, . . . , K]) for instruction execution of program instructions from various threads (T), each standard processor root unit type (2p) having N local context memories (32pt) which each buffer-store part of a current processor state for a thread. The multithread processor (1) also has a plurality (N) of global context memories (3t; tε[1, . . . , N]) which each buffer-store part of a current processor state for a thread, and a thread control unit (4) which can connect any standard processor root unit (2pq) to any global context memory (3t).
摘要:
A method for compressing a data packet is proposed, the data packet comprising at least a first data block and a second data block, the first data block referring to the second data block. In the method, the second data block is compressed and it is noted in the data packet that the second data block has been compressed. In one embodiment, the method is suitable for IPv6 data packets, the second data block then being, for example, a routing header.
摘要:
In orthogonal frequency division modulation, use is made of the fact that the individual carriers which are transmitted on the principle of frequency multiplexing are orthogonal to one another. The modulation can then be carried out relatively simply using discrete Fourier transformation. Sicne the calculation of the discrete Fourier transformation involves a large number of multiplications, the bit data which are intended to be modulated onto the carriers are combined in each case to form a two-dimensional vector. The vector is supplied to a two-dimensional inverse Fourier transformation as the input variable. The number of multiplications required is thus reduced. The invention is particularly suitable for transmission of broadcast radio, television and mobile radio signals.
摘要:
A computing device includes a hardware data processing unit having at least one input buffer, a plurality of output buffers, a data transfer unit, and a software control unit, the data transfer unit configured to transfer data from the input buffer to the plurality of output buffers, and the software control unit configured to control the data transfer unit.
摘要:
According to one embodiment, a connection is established between a first communication device and a second communication device in accordance with one or more communication layers. Each communication layer is associated with a standard structure and protocol. An ad hoc communication layer structure and/or protocol are determined at the first communication device. The ad hoc communication layer structure and/or protocol are communicated to the second communication device. One or more of the standard structures and/or protocols are replaced at the first communication device with the ad hoc communication layer structure and/or protocol responsive to the second communication device acknowledging acceptance of the ad hoc communication layer structure and/or protocol.
摘要:
A unit for distributing and processing data packets has an administration unit for distributing the data packets to parallel-connected processor units. In this case, the processors of adjacent processor units have intermediate connections for interchanging data. The administration unit distributes the data packets in dependence on administration information for the data packets and/or on operating information for the processor units.