Short-Distance Wireless Data Transmitting Apparatus and Method

A short distance wireless data transmission system, which includes a transmission data generation unit for adding a redundancy to data to be transmitted and then outputting the data, and a received data processing unit for recovering data included in received backward packet to original data, and then outputting the original data, the system comprising:

• a memory controller for storing real time data, which is recovered in the receiving data processing unit, in a memory address which is indicated by record position information within a forward packet, for generating subsequent record position indication information indicating the memory address in which real time data of the subsequent forward packet must be stored, and output position indication information of real time data which is presently outputted from a memory, and for outputting the information thereto;
• a transmission/reception controller for variably setting a setting channel according to control information within wireless received forward packet, for performing backward packetization for subsequent record position indication information and output position indication information, which is inputted from the memory controller, together with non-real time data, and for transmitting the packet thereto;
• and
• an RF transmitting/receiving unit for communicating the forward packet and backward packet with the master side in wireless interface fashion.

A method for transmitting short distance wireless data, comprising the steps of:

• storing real time data to be transmitted in a memory;
• reading the real time data for packetization from the memory to perform forward packetization of the real time data, non-real time data, and header information, and transmitting the forward packet to a slave side through the setting cannel;
• checking as to whether there is a data re-transmission request in a backward packet which is transmitted from the slave side through the setting channel;
• comparing variation amount of data, which is stored in the memory, with a predetermined channel change reference value, if the data re-transmission request exists;
• after real time data in a previous frame, which receives a re-retransmission request, is read from the memory based on the comparison result, performing re-transmission to the slave side or requesting a change toward a replacement channel without interference to the slave side, in which the replacement channel is searched for over a replacement channel test interval;
• and
• performing transmission/reception of the forward packet and backward packet through the replacement channel.

A method for transmitting short distance wireless data, comprising the steps of:

• storing real time data in a forward packet, which is received through a setting channel, in a memory address which is indicated by record position information which is transmitted together with the real data;
• performing backward packetization for non-real time data, record position indication information including record position in which real time data must be stored in a subsequent forward packet, and output position indication information of real time data which is presently outputted from the memory, and then transmitting the packet to a master side;
• and
• transmitting the backward packet while a communication channel is varied according to control information in a received forward packet.