公开(公告)号：AT557569T

公开(公告)日：2012-05-15

申请号：AT09734332

申请日：2009-04-23

Applicant: PANASONIC CORP

Inventor： MATSUSHITA YOSUKE ,  FUJIWARA YUKI ,  HOMMA HIDEKI ,  NAOKI MORITA ,  KURODA GO

IPC: H04W74/08

Abstract: There is provided a communication apparatus which, in an ad-hoc network, when receiving control packets from a plurality of terminals, can determine whether or not there is a collision among the control packets, and, based on the determination, can be prevented from continuing to be out of the network due to a collision among the control packets transmitted from the plurality of terminals. In the communication terminal, a communication section receives a control packet which periodically comes up on a communication path. When the communication apparatus receives a plurality of control packets which are defective in at least payload portions thereof within a predetermined time period, if a control section determines that source addresses included in header portions of the control packets which are defective in the payload portions thereof include a source address which is not identical to the other source addresses, the control section determines that the control packets are transmitted from a plurality of terminals and collide with each other.

公开(公告)号：EP2337270A4

公开(公告)日：2012-02-29

申请号：EP09820366

申请日：2009-09-14

Applicant: PANASONIC CORP

Inventor： MATSUSHITA YOSUKE ,  FUJIWARA YUKI ,  HOMMA HIDEKI ,  MORITA NAOKI

IPC: H04L12/56 ,  H04W40/30

CPC classification number: H04W40/30 ,  H04L45/00 ,  H04L45/025 ,  H04L45/125 ,  H04L45/22 ,  H04W40/12 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/22 ,  Y02D70/34

Abstract: Provided is a communication terminal that is capable of securing a route having the finest state while suppressing a bandwidth that is consume by a transmission of a control packet at a low level, when applied in an ad-hoc network which uses an electrical power line. The communication terminal included in the ad-hoc network acquires a plurality of route candidates at the beginning of a data transmission by conducting a broadcast transmission of a route creation packet, and acquires a route having the finest state by conducting an unicast transmission of a route estimation packet to each of the route candidates in each predetermined period.

公开(公告)号：EP2337283A4

公开(公告)日：2014-01-22

申请号：EP09820389

申请日：2009-10-02

Applicant: PANASONIC CORP

Inventor： FUJIWARA YUKI ,  MATSUSHITA YOSUKE ,  HOMMA HIDEKI ,  MORITA NAOKI

IPC: H04B3/54 ,  H04L12/28 ,  H04L12/70 ,  H04W28/02 ,  H04W76/02 ,  H04W88/02

CPC classification number: H04B3/54 ,  H04B2203/5445 ,  H04L45/02 ,  H04L45/121 ,  H04L45/22 ,  H04L45/26

公开(公告)号：EP2271029A4

公开(公告)日：2011-05-04

申请号：EP09734332

申请日：2009-04-23

Applicant: PANASONIC CORP

Inventor： MATSUSHITA YOSUKE ,  FUJIWARA YUKI ,  HOMMA HIDEKI ,  NAOKI MORITA ,  KURODA GO

IPC: H04W74/08

CPC classification number: H04W74/0825 ,  H04B3/54 ,  H04L29/0653 ,  H04L49/55 ,  H04W40/30 ,  H04W84/18