Title:
【発明の名称】伝送された情報の受領通知の方法及び装置
Document Type and Number:
Japanese Patent JP3466188
Kind Code:
B2
Abstract:
PCT No. PCT/SE93/00935 Sec. 371 Date Nov. 17, 1995 Sec. 102(e) Date Nov. 17, 1995 PCT Filed Nov. 8, 1993 PCT Pub. No. WO94/11832 PCT Pub. Date May 26, 1994The present invention provides a method and a device for increasing the coverage in a shop data system for each individual information module (B1-B10), which has a low output power for its message acknowledgement at the reception of information, ensuring that a signal of acknowledgement indicating reception of information reaches a system computer. An information device, for instance a shelf-edge module (B5), which has received a correctly decoded information intended for this particular module, emits a signal of acknowledgement, which then is repeated by said other modules (B1-B4, B6-B10), which also have decoded said message finding that it was not intended for them. These modules (B1-B4, B6-B10) switch to a repeater mode so that said signal of acknowledgement emitted by said addressed module (B5), will be repeated by each such other module in said repeater mode, which perceives said signal of acknowledgement, said signal of acknowledgement propagating back to said transmitting unit (TX) during a period of time between transmitted messages. Herethrough, it is only required, that each information module has a coverage for its signal of acknowledgement such that this signal reaches at least one other additional information module.
Inventors:
Aalm, logger
Edmark, Aura
Edmark, Aura
Application Number:
JP51198494A
Publication Date:
November 10, 2003
Filing Date:
November 08, 1993
Export Citation:
Assignee:
Pricer Abby
International Classes:
G07G1/14; G06K17/00; G06Q20/20; G06Q30/02; G07G1/06; H04B10/114; H04L1/16; H04L1/00; H04L1/12; (IPC1-7): G07G1/14; G07G1/06
Domestic Patent References:
| JP5199187A | ||||
| JP4505083A |
Other References:
【文献】国際公開92/16901(WO,A1)
Attorney, Agent or Firm:
Hidekazu Miyoshi (1 outside)