Transporting residue of vehicle position data via wireless network

• US 9,043,145 B2
• Filed: 03/15/2013
• Issued: 05/26/2015
• Est. Priority Date: 03/30/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: An, Wen Hao, Fan, Liya, Gao, Bo, Sun, Xi, Zhang, Yuzhou
• Primary Examiner(s): Olszewski, John R
• Assistant Examiner(s): MERLINO, DAVID P
• Application Number:
  US13/832,481
• Publication Number:
  US 20130275044A1
• Time in Patent Office: 802 Days
• Field of Search: None
• US Class Current: 701/517
• CPC Class Codes: G08G 1/0112 from the vehicle, e.g. floating car data [FCD]
• CPC Class Codes: G08G 1/0129 for creating historical data or processing based on historical data
• CPC Class Codes: G08G 1/127 to a central station ; Indicators in a central station
• CPC Class Codes: H03M 7/40 Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
• CPC Class Codes: H03M 7/4006 Conversion to or from arithmetic code
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

The invention relates to compressed data transmission in wireless data communication. Disclosed are methods and apparatuses for transporting residue of vehicle position data via a wireless network. A disclosed method for transporting residue of vehicle position data via a wireless network, includes the steps of: receiving data for updating residue encoding schema from a monitoring server; constructing a residue encoding schema based on the data, thereby producing a constructed residue encoding schema; and storing the constructed residue encoding schema such that the constructed residue encoding schema will become the current residue encoding schema; where: the constructed residue encoding schema is constructed such that each residue of the constructed residue encoding schema corresponds to a code; and the constructed residue encoding schema is constructed such that a residue having a relatively high probability of occurrence corresponds to a code of relatively short length.

Claims

1. A method for transporting residue of vehicle position data via a wireless network, comprising the steps of:

receiving, by a processor in a backend server, code from a vehicle-mounted terminal via the wireless network;

deriving, by the processor, position data of a vehicle from the code according to a current residue encoding schema;

determining, by the processor, whether updating the current residue encoding schema is needed according to context information of the vehicle;

generating, by the processor, data for updating the current residue encoding schema if updating the current residue encoding schema is needed;

transporting, by the processor, the data for updating the current residue encoding schema to the vehicle-mounted terminal via the wireless network if updating the current residue encoding schema is needed;

constructing, by the processor, a residue encoding schema based on the data for updating the current residue encoding schema, thereby producing a constructed residue encoding schema if updating the current residue encoding schema is needed; and

updating, by the processor, the current residue encoding schema with the constructed residue encoding schema if updating the current residue encoding schema is needed;

wherein;

the code is code for residue of position data of the vehicle obtained via the vehicle'"'"'s data acquisition device;

the vehicle-mounted terminal is located in the vehicle;

the current residue encoding schema corresponds to the vehicle;

the constructed residue encoding schema is constructed such that each residue of the constructed residue encoding schema corresponds to one code; and

the constructed residue encoding schema is constructed such that a residue having a relatively high probability of occurrence corresponds to a code of relatively short length.

2. The method of claim 1, wherein the generating step further comprises:

generating, by the processor, a normalized residue distribution of position data of all vehicles that comply with a condition of the vehicle according to historical data.

3. The method of claim 2, wherein the data for updating the current residue encoding schema is comprised of a mean value and a standard deviation, which characterize the normalized residue distribution.

4. The method of claim 3, wherein the constructing step further comprises:

deriving, by the processor, a sampling time interval based residue distribution of the vehicle based on the mean value and the standard deviation; and

calculating, by the processor, a probability of occurrence of a residue according to the sampling time interval based residue distribution.

5. The method of claim 1, further comprising the step of storing, by the processor, the position data of the vehicle.

6. The method of claim 1, wherein the determining step further comprises:

determining, by the processor, that updating the current residue encoding schema is needed if the position data of the vehicle indicates that a road section in which the vehicle is located has changed.