초록 ▼

In a radio data communication network where a plurality of radio data communication apparatuses mutually communicate information through frames carried by radio waves, a communication method using radio data communication apparatuses having a relay function is provided. When two radio data communica

In a radio data communication network where a plurality of radio data communication apparatuses mutually communicate information through frames carried by radio waves, a communication method using radio data communication apparatuses having a relay function is provided. When two radio data communication apparatuses cannot directly communicate with each other due to the limit of the radio wave range, another radio data communication apparatus serves as a relay station to relay frames between the two apparatuses, thus extending a communicable range.

대표청구항 ▼

[ I claim:] [1.] In a radio data communication network for communicating data through frames carried by radio waves, including a plurality of radio data communication apparatus, each having a relay function, located within said radio data communication network, at least part of said radio data commu

[ I claim:] [1.] In a radio data communication network for communicating data through frames carried by radio waves, including a plurality of radio data communication apparatus, each having a relay function, located within said radio data communication network, at least part of said radio data communication apparatuses comprising:transmitter means for transmitting a frame to be carried by a radio wave to at least one other radio data communication apparatus, said frame having a destination address of a radio data communication apparatus which is specified to be a destination;receiver means for receiving a frame transmitted from any other radio data communication apparatus;first determination means for determining whether a frame received by said receiver means has an address directed to the radio data communication apparatus which has received the frame;reception processing means for processing the received frame for reception when said first determination means determines that the received frame has the address directed to the radio data communication apparatus which has received the frame;relay means for transmitting the received frame to at least one other radio data communication apparatus by a radio wave when said first determination means determines that the received frame does not have the address directed to the radio data communication apparatus which has received the frame;said transmitter means transmits either one of a search frame for searching for relay route information from a sending end radio data communication apparatus to a destination radio data communication apparatus, said search frame having a relay station address field in which addresses of relay radio data communication apparatuses are registered in order, and a data frame including data to be transmitted;said receiver means includes third determination means for determining whether said received frame is a search frame or a data frame; andsaid relay means includes means for registering the address of said radio data communication apparatus in the highest rank unregistered field within said relay station address field and transmitting said search frame when said first determination means determines that the received frame does not have the address directed to the radio data communication apparatus which has received the frame and when said third determination means determines that said received frame is a search frame.