公开(公告)号：CA2778499A1

公开(公告)日：2011-05-05

申请号：CA2778499

申请日：2010-10-18

Applicant: IBM

Inventor： ZHU YAN FENG ,  XIANG ZHE ,  WANG HUAYONG ,  SHANG WEI XIONG ,  ZHOU JIN ,  YING CHUN

IPC: G08G1/01 ,  H04W64/00

Abstract: A method for determining travel time of a vehicle on a road, wherein the vehicle is operable within a mobile communication network, comprising: collecting historical communication events of a mobile user in order to obtain travel samples, wherein the historical communication events indicate when the mobile user travelled along a monitored road; determining a cell handover sequence from the historical communication events; determining from the cell handover sequence, one of more road segments of the monitored road; determining the travel time of the one or more road segments according to the travel time samples; selecting, for an undetermined road segment of the monitored road for which the real-time travel time is not determined from the collected historical communication events, a candidate mobile user that is most likely to appear on the undetermined road segment; actively positioning the candidate mobile user to obtain positioning information; and returning to the step of collecting communication events of a mobile user currently on a monitored road with the active positioning as one communication event for the candidate mobile user, to determine the real-time travel time of the undetermined road segment.

公开(公告)号：AT387662T

公开(公告)日：2008-03-15

申请号：AT03780399

申请日：2003-12-15

Applicant: IBM

Inventor： WANG HAO ,  LI SHIH-GONG ,  WEI LI ,  SONG SONG ,  LIU XIAO ,  RONG Y F ,  YING CHUN

IPC: G06F9/46 ,  G06F3/01 ,  G06F9/50 ,  G06F15/00 ,  G06F15/16 ,  H04L12/24 ,  H04L29/08

Abstract: Provides a service providing device and method enabling a user to accept the service by utilizing the capabilities of several various devices. At least one physical device is selected for the user based on the service requirement. The user accepts the service via the selected physical device or devices. The invention “hides” the physical devices by using a virtual device to provide the service for users. Furthermore, the invention provides a “tailored” virtual device based on the environment around the user, the favorite of user and the requirements of the service, and may provide to the user the “tailored” information suitable for the user. The operating environment of the virtual device according to the invention is dynamically changeable according to the environment around the user, the favorite of user and the requirements of the service. Thus, a seamless service may be provided to the user.