Method and device for adjusting data transmission rate in wireless communication system

A method of changing a data length of Bluetooth communication by a first device in a wireless communication system, the method comprising:

• receiving first information related with whether extension of a transmission data length and a reception data length is supported, from a second device;
• receiving second information related with a data length of the second device from the second device;
• negotiating the data length based on the second information and third information related with a data length of the first device;
• transmitting the negotiated data length to the second device,
• wherein the second information includes at least one of first maximum transmission data length information, first maximum reception data length information, first maximum transmission time information, or first maximum reception time information,
• wherein the third information includes at least one of second maximum transmission data length information, second maximum transmission time information, or second maximum reception time information,
• wherein the negotiated data length includes at least one of a transmission data length, a reception data length, a transmission time, or a reception time,
• wherein the transmission data length indicates a smaller value among the second maximum transmission data length information and the first maximum reception data length information,
• wherein the reception data length indicates a smaller value among the second maximum reception data length information and the first maximum transmission data length information,
• wherein the transmission time indicates a smaller value among the second maximum transmission time information and the first maximum reception time information, and
• wherein the reception time indicates a smaller value among the second maximum reception time information and the first maximum transmission time information.

An apparatus for extending a data length of Bluetooth communication in a wireless communication system, the apparatus comprising a first device which comprises:

• a transceiver configured to transmit and receive signals;
• and
• a controller functionally connected to the transceiver, wherein the controller:
• receives a first message including information of a second device from the second device,
• transmits a connection request message to the second device based on the first message,
• establishes Bluetooth connection with the second device based on the connection request message,
• transmits an extension request message which requests extension of a transmission data length, and a reception data length through the Bluetooth connection, and
• receives an extended response message in response to the extension request message through the Bluetooth connection,
• wherein the extension request message includes at least one of first maximum transmission data length information, first maximum reception data length information, first maximum transmission time information, or first maximum reception time information of the first device,
• wherein the extension response message includes at least one of second maximum transmission data length information, second maximum reception data length information, second maximum transmission time information, or second maximum reception time information of the second device,
• wherein the controller negotiates a transmission data length and a reception data length,
• wherein the transmission data length is negotiated with the second device based on at least one of third maximum transmission data length information or third maximum transmission time information,
• wherein the reception data length is negotiated based on at least one of third maximum reception data length information or third maximum reception time information,
• wherein the third maximum transmission data length information is determined by negotiation as a smaller value among the first maximum transmission data length information and the second maximum reception data length information,
• wherein the third maximum transmission time information is determined by negotiation as a smaller value among the first maximum transmission time information and the second maximum reception time information,
• wherein the third maximum reception data length information is determined by negotiation as a smaller value among the first maximum reception data length information and the second maximum transmission data length information, and
• wherein the third maximum reception time information is determined by negotiation as a smaller value among the first maximum reception time information and the second maximum transmission time information.