Short distance radio communication system and its switching processing method

Abstract

Disclosed is a handoff processing method capable of restarting fast communications. The handoff processing method stores in a handoff buffer Host Control Interface (HCI) data and transmission data upon communications in a state where an Access Point is interlinked with an external device. Further, the method forwards the HCI data and the transmission data buffered in the handoff buffer to a new Access Point transmitting a message indicating setup completion of a connection if the message indicating setup completion of a connection with the external device is transmitted from the new AP after a handoff occurs as the external device moves. Accordingly, throughputs are not lowered despite handoff occurrences in poor wireless channel environments, so that service quality can be enhanced.

Description

technical field [0001] The present invention relates to a short-distance wireless communication system, in particular to a short-distance wireless communication system and a handover processing method for processing handover as a mobile terminal moves. Background technique [0002] A short-distance wireless communication system such as Bluetooth that performs communication using a time division duplex (TDD) scheme is currently devised so that an access point (Access Point, AP) connected to a basic network (wired / wireless) acts as a master device, and each A mobile terminal acts as a slave device. At this time, if the mobile terminal recognizing the AP as the master device is entering a different wireless range, it is necessary to automatically switch the current communication channel of the mobile terminal to a different communication channel for the different wireless range. Such communication channel switching according to the movement of the mobile terminal is called han...

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Problems solved by technology

Therefore, I-TCP reduces its processing speed, which is wasteful for resource utilization

Also, there may be bottleneck areas between the divided wireless and wired connections, which poses the problem of delaying the smooth flow of the entire network

[0013] Also, in BTB, the proxy management layer 4 TCP and ACK packets located on layer 2.5, which poses the problem of violating the concept of layering

Also, if a handover occurs in the following state: the data handled by the BTB proxy processes and completely transmits a portion of a plurality of baseband packets consisting of Internet Protocol (IP) packets received from the beginning of communication with the new AP Yes, this brings up the problem of adding overhead on Bluetooth

Moreover, under the current TCP mechanism, BTB sends ACK packets one by one each time it receives TCP segments one by one, instead of using a timer to send ACK packets, so there is a problem that the AP cannot generate traffic due to blocked TCP streams. The problem with ACK packets to initiate communication

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