Packet transmission system, packet transmission method, packet update method, host apparatus, and computer program product thereof for the packet transmission system

A packet transmission system, comprising:

• a mobile apparatus being configured to generate and transmit a first positioning packet, wherein the first positioning packet includes a first message serial number;
• and
• a host apparatus being configured to receive the first positioning packet and generate a first temporary packet, wherein the first temporary packet includes a second message serial number;
• wherein when the host apparatus determines that the first message serial number of the first positioning packet is smaller than the second message serial number of the first temporary packet, the host apparatus transmits the first temporary packet to the mobile apparatus;
• wherein after the mobile apparatus receives the first temporary packet, the mobile apparatus updates the first message serial number into the second message serial number, and then generates and transmits a second positioning packet including the second message serial number to the host apparatus.

A computer program product stored in a computer readable medium for a packet transmission system to perform a packet transmission method, the packet transmission system comprising a mobile apparatus and a host apparatus, the computer program product comprising:

• an instruction A for the mobile apparatus to transmit a first positioning packet, wherein the first positioning packet includes a first message serial number;
• and
• an instruction B for the host apparatus to receive the first positioning packet;
• an instruction C for the host apparatus to generate a first temporary packet, wherein the first temporary packet includes a second message serial number;
• an instruction D for the host apparatus to determine that the first message serial number of the first positioning packet is smaller than the second message serial number of the first temporary packet;
• an instruction E for the host apparatus to transmit the first temporary packet;
• an instruction F for the mobile apparatus to receive the first temporary packet and update the first message serial number into the second message serial number;
• and
• an instruction G for the mobile apparatus to transmit a second positioning packet, wherein the second positioning packet includes the second message serial number.

A packet update method, comprising the steps of:

• receiving a first positioning packet, wherein the first positioning packet includes a first message serial number;
• generating a first temporary packet, wherein the first temporary packet includes a second message serial number;
• determining that the first message serial number of the first positioning packet is smaller than the second message serial number of the first temporary packet;
• and
• transmitting the first temporary packet.

A host apparatus, comprising:

• a receiving module, being configured to receive a first positioning packet, wherein the first positioning packet includes a first message serial number;
• a microprocessor, being configured to generate a first temporary packet, wherein the first temporary packet includes a second message serial number;
• a comparison module;
• and
• a transmitting module;
• wherein when the comparison module determines that the first message serial number of the first positioning packet is smaller than the second message serial number of the first temporary packet, the transmitting module transmits the first temporary packet.

A computer program product stored in a computer readable medium for a host apparatus to perform a packet update method, the host apparatus comprising a receiving module, a microprocessor, a comparison module and a transmitting module, the computer program product comprising:

• an instruction A for the receiving module to receive a first positioning packet, wherein the first positioning packet includes a first message serial number;
• an instruction B for the microprocessor to generate a first temporary packet, wherein the first temporary packet includes the second message serial number;
• an instruction C for the comparison module to determine that the first message serial number of the first positioning packet is smaller than the second message serial number of the first temporary packet;
• and
• an instruction D for the transmitting module to transmit the first temporary packet.