Direct mode communication system and communication attaching method thereof

A direct-mode communication system, comprising:

• a first client direct-mode communication apparatus;
• and
• a first backhaul network, connecting with a second backhaul network that connects with a second client direct-mode communication apparatus;
• wherein the first client direct-mode communication apparatus transmits a proximity notification request to the second backhaul network via the first backhaul network so that the second backhaul network transmits a proximity notification ACK signal to the first client direct-mode communication apparatus via the first backhaul network according to the proximity notification request;
• the first backhaul network receives a piece of first client location information of the first client direct-mode communication apparatus and a piece of second client location information of the second client direct-mode communication apparatus from the first client direct-mode communication apparatus and the second backhaul network respectively;
• the first backhaul network further determines a location relationship between the first client direct-mode communication apparatus and the second client direct-mode communication apparatus according to the first client location information and the second client location information, and transmits a Wi-Fi connection signal to the first client direct-mode communication apparatus according to the location relationship;
• and the first client direct-mode communication apparatus further creates a direct-mode communication connection with the second client direct-mode communication apparatus according to the Wi-Fi connection signal.

A communication attaching method for use in a direct-mode communication system, the direct-mode communication system comprising a first client direct-mode communication apparatus, a first backhaul network and a second backhaul network, and the second backhaul network connecting with a second client direct-mode communication apparatus, the communication attaching method comprising:

• (a) enabling the first client direct-mode communication apparatus to transmit a proximity notification request to the second backhaul network via the first backhaul network;
• (b) enabling the second backhaul network to transmit a proximity notification ACK signal to the first client direct-mode communication apparatus via the first backhaul network according to the proximity notification request;
• (c) enabling the first backhaul network to, after the step (b), receive a piece of first client location information of the first client direct-mode communication apparatus and a piece of second client location information of the second client direct-mode communication apparatus from the first client direct-mode communication apparatus and the second backhaul network respectively;
• (d) enabling the first backhaul network to determine a location relationship between the first client direct-mode communication apparatus and the second client direct-mode communication apparatus according to the first client location information and the second client location information;
• (e) enabling the first backhaul network to transmit a Wi-Fi connection signal to the first client direct-mode communication apparatus according to the location relationship;
• and
• (f) enabling the first client direct-mode communication apparatus to create a direct-mode communication connection with the second client direct-mode communication apparatus according to the Wi-Fi connection signal.

A direct-mode communication system, comprising:

• a first client direct-mode communication apparatus;
• a first backhaul network;
• and
• a second backhaul network, connecting with a second client direct-mode communication apparatus;
• wherein the first client direct-mode communication apparatus transmits a proximity notification request to the second backhaul network via the first backhaul network;
• the second backhaul network transmits a proximity notification ACK signal to the first client direct-mode communication apparatus via the first backhaul network according to the proximity notification request;
• the first backhaul network receives a piece of first client location information of the first client direct-mode communication apparatus and a piece of second client location information of the second client direct-mode communication apparatus from the first client direct-mode communication apparatus and the second backhaul network respectively;
• the first backhaul network further determines a location relationship between the first client direct-mode communication apparatus and the second client direct-mode communication apparatus according to the first client location information and the second client location information, and transmits a Wi-Fi connection signal to the first client direct-mode communication apparatus according to the location relationship;
• and the first client direct-mode communication apparatus further creates a direct-mode communication connection with the second client direct-mode communication apparatus according to the Wi-Fi connection signal.

A communication attaching method for use in a first client direct-mode communication apparatus, the first client direct-mode communication apparatus being used in a direct-mode communication system that further comprises a first backhaul network, and the first backhaul network connecting with a second backhaul network and receiving a piece of second client location information of a second client direct-mode communication apparatus via the second backhaul network, the communication attaching method comprising the following steps of:

• (a) enabling the first client direct-mode communication apparatus to transmit a proximity notification request to the second backhaul network via the first backhaul network so that the second backhaul network transmits a proximity notification ACK signal to the first client direct-mode communication apparatus via the first backhaul network according to the proximity notification request;
• (b) enabling the first client direct-mode communication apparatus to, after the step (a), transmit a piece of first client location information to the first backhaul network so that the first backhaul network determines a location relationship between the first client direct-mode communication apparatus and the second client direct-mode communication apparatus according to the first client location information and the second client location information and transmits a Wi-Fi connection signal to the first client direct-mode communication apparatus according to the location relationship;
• and
• (c) enabling the first client direct-mode communication apparatus to create a direct-mode communication connection with the second client direct-mode communication apparatus according to the Wi-Fi connection signal.

A first client direct-mode communication apparatus for use in a direct-mode communication system, the direct-mode communication system further comprising a first backhaul network, and the first backhaul network connecting with a second backhaul network and receiving a piece of second client location information of a second client direct-mode communication apparatus via the second backhaul network, the first client direct-mode communication apparatus comprising:

• a transceiver;
• and
• a processor;
• wherein the transceiver is configured to transmit a proximity notification request to the second backhaul network via the first backhaul network so that the second backhaul network transmits a proximity notification ACK signal to the first client direct-mode communication apparatus via the first backhaul network according to the proximity notification request;
• the transceiver is further configured to transmit a piece of first client location information of the first client direct-mode communication apparatus to the first backhaul network so that the first backhaul network determines a location relationship between the first client direct-mode communication apparatus and the second client direct-mode communication apparatus according to the first client location information and the second client location information and transmits a Wi-Fi connection signal to the first client direct-mode communication apparatus according to the location relationship;
• and the processor is configured to create a direct-mode communication connection with the second client direct-mode communication apparatus via the transceiver according to the Wi-Fi connection signal.