公开(公告)号：US09961005B2

公开(公告)日：2018-05-01

申请号：US14641223

申请日：2015-03-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoru Tokutsu ,  Tomoki Ishii ,  Atsushi Yoshida ,  Takao Yamaguchi ,  Nobuyuki Ichiguchi

IPC: H04L12/833 ,  H04L12/40 ,  H04L12/46 ,  H04L12/947

CPC classification number: H04L47/2458 ,  H04L12/4015 ,  H04L12/4625 ,  H04L49/252

Abstract: A bus system (100) for a semiconductor circuit transmits data on a networked bus between a first node and at least one second node via a relay device (250) arranged on the bus. The bus system (100) includes a first bus of a low delay and a second bus of a high delay. The first node generates a plurality of packets by attaching, to the data stored in a buffer (202), information specifying a priority of transmission. The relay device (250) converts a priority based on a priority conversion rule, which is determined based on a transmission delay of the high-delay bus, allocates a buffer of a destination relay device to which each packet is to be sent, based on the converted priority, and sends packets in a descending order. The relay device (250) stores packets in a buffer (252) based on the priority.

公开(公告)号：US09703732B2

公开(公告)日：2017-07-11

申请号：US14530971

申请日：2014-11-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Ishii ,  Takao Yamaguchi ,  Atsushi Yoshida ,  Satoru Tokutsu ,  Nobuyuki Ichiguchi

IPC: G06F13/16 ,  G06F13/42

CPC classification number: G06F13/1621 ,  G06F13/1657 ,  G06F13/1689 ,  G06F13/4282 ,  G06F2213/0038

Abstract: An exemplary interface apparatus according to the present disclosure connects together an initiator and a packet exchange type bus network formed on the integrated circuit. In the bus network, if the initiator has submitted request data with a deadline time specified, the initiator receives, by the deadline time, response data to be issued by a node in response to the request data. The interface apparatus includes: a correcting circuit which corrects the deadline time of the request data according to the timing when the request data has been submitted, thereby generating corrected deadline time information; a header generator which generates a packet header that stores the corrected deadline time information; and a packetizing processor which generates a request packet based on the request data and the packet header.