Method of avoiding signal interference among a plurality of remote control signals
First Claim
1. A method of transmitting and receiving signals between a plurality of remote controls and a single receiver comprising the steps of:
- repeatedly sending a transmission signal for a period ST;
composing each period of a transmission permitting data frame STa and a transmission preventing data frame STb, wherein the transmission permitting data frame STa having a time period which is equal to or shorter than a time period for the transmission preventing data frame STb (STa≦
STb);
composing each transmission permitting data frame STa of a transmission unit of time TT times 2i-1, where "i" is a positive integer which is different for each remote control or channel; and
composing each transmission unit of time TT of a data-present sub-section DTa and data-absent sub-section DTb, and wherein the data-present sub-section DTa having a time period which is equal to or shorter than a time period for the data-absent sub-section DTb (DTa≦
DTb).
1 Assignment
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Accused Products
Abstract
A transmitting and receiving system includes two or more remote controls and a single receiver, which a machine or apparatus to be controlled is equipped with. Each remote control has a proper number "i" allotted thereto, and is capable of sending a control signal to the machine or apparatus. The repetitive period ST of transmission is composed of a transmission permitting data frame STa and a transmission preventing data frame STb, provided that the transmission permitting data frame Sta is equal to or shorter than the transmission preventing data frame STb (STa≦STb). The transmission permitting data frame STa is determined by multiplying a given transmission unit of time TT by 2i-1. The transmission unit of time TT is composed of a data present sub-section DTa and a data absent sub-section DTb, provided that data-present sub-section DTa is equal to or shorter than data-absent sub-section DTb (DTa≦DTb).
22 Citations
4 Claims
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1. A method of transmitting and receiving signals between a plurality of remote controls and a single receiver comprising the steps of:
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repeatedly sending a transmission signal for a period ST; composing each period of a transmission permitting data frame STa and a transmission preventing data frame STb, wherein the transmission permitting data frame STa having a time period which is equal to or shorter than a time period for the transmission preventing data frame STb (STa≦
STb);composing each transmission permitting data frame STa of a transmission unit of time TT times 2i-1, where "i" is a positive integer which is different for each remote control or channel; and composing each transmission unit of time TT of a data-present sub-section DTa and data-absent sub-section DTb, and wherein the data-present sub-section DTa having a time period which is equal to or shorter than a time period for the data-absent sub-section DTb (DTa≦
DTb). - View Dependent Claims (2, 3, 4)
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Specification