Communication system including correlation information correlating area and transmission resource

• US 8,428,078 B2
• Filed: 07/13/2010
• Issued: 04/23/2013
• Est. Priority Date: 07/28/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Nakaya, Yuuta, Iida, Ichiro, Fujino, Nobutsugu, Yoshida, Makoto, Machida, Mamoru, Moriya, Masayoshi, Ushiki, Kazumasa
• Primary Examiner(s): Weidner, Timothy J
• Application Number:
  US12/835,456
• Publication Number:
  US 20110026543A1
• Time in Patent Office: 1,015 Days
• Field of Search: None
• US Class Current: 370/437
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 74/0816 with collision avoidance

Abstract

A mobile communication apparatus includes a storage unit that stores therein correspondence information correlating area and transmission resource; an area deducing unit that deduces in which area the mobile communication apparatus is located; a selecting unit that selects the transmission resource correlated, in the correlation information stored by the storage unit, with the area deduced by the area deducing unit; and a transmitter that using the transmission resource selected by the selecting unit, transmits data to a second mobile communication apparatus.

Claims

1. A mobile communication apparatus comprising:

a receiving unit that receives, as Vehicle Information and Communication Systems (VICS) information, correlation information correlating area and transmission resource;

a storage unit that stores therein the correlation information received by the receiving unit;

an area deducing unit that deduces in which area from among a plurality of areas the mobile communication apparatus is located;

a selecting unit that selects the transmission resource correlated, in the correlation information stored by the storage unit, with the area deduced by the area deducing unit; and

a transmitter that, using the transmission resource selected by the selecting unit, transmits data to a second mobile communication apparatus,

wherein if an autonomously managed area in which the data is directly transmitted between the mobile communication apparatus and the second mobile communication apparatus and a centrally managed area in which data transmission by the mobile communication apparatus and the second mobile communication apparatus is controlled by a base station are present,

the storage unit stores therein attribute information indicating for each area from among the plurality of areas, whether the area is the autonomously managed area or the centrally managed area, and

the selecting unit, based on the attribute information stored by the storage unit, determines whether the deduced area is the autonomously managed area or the centrally managed area, and upon determining the deduced area to be the autonomously managed area, selects the transmission resource correlated with the deduced area, and upon determining the deduced area to be the centrally managed area, selects a transmission resource reported by the base station.

2. The mobile communication apparatus according to claim 1, wherein the correlation information correlates a different transmission resource with each area from among the plurality of areas in which the mobile communication apparatus and the second mobile communication apparatus become hidden nodes with respect to one another.

3. The mobile communication apparatus according to claim 2, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having times that differ.

4. The mobile communication apparatus according to claim 2, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having frequencies that differ.

5. The mobile communication apparatus according to claim 2, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having codes that are for code division and that differ.

6. The mobile communication apparatus according to claim 1, wherein the correlation information correlates a different transmission resource with each area from among the plurality of areas that is adjacent to a common area.

7. The mobile communication apparatus according to claim 6, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having times that differ.

8. The mobile communication apparatus according to claim 6, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having frequencies that differ.

9. The mobile communication apparatus according to claim 6, wherein the correlation information correlates with areas from among the plurality of areas, respectively, transmission resources having codes that are for code division and that differ.

10. The mobile communication apparatus according to claim 1, wherein the correlation information correlates a same transmission resource with areas from among the plurality of areas that are not adjacent to a common area.

11. The mobile communication apparatus according to claim 1, wherein the storage unit stores therein sets of the correlation information, and the selecting unit alternately selects the sets of the correlation information and based on the selected sets of the correlation information, selects a transmission resource.

12. The mobile communication apparatus according to claim 1, further comprising:

a controller that executes medium access control within a range of a selected transmission resource selected by the selecting unit, wherein

the transmitter transmits the data, based on the medium access control executed by the controller.

13. The mobile communication apparatus according claim 12, further comprising:

a measuring unit that measures incoming signal strength of a signal from the second mobile communication apparatus, wherein

the controller executes the medium access control based on the incoming signal strength measured by the measuring unit.

14. The mobile communication apparatus according to claim 1, wherein the area deducing unit deduces the area, based on coordinate information that is for the mobile communication apparatus and received from a global positioning system.

15. A communication method for a mobile communication apparatus, comprising:

receiving, as Vehicle Information and Communication Systems (VICS) information, correlation information correlating area and transmission resource;

storing the received correlation information;

deducing in which area from among a plurality of areas the mobile communication apparatus is located;

selecting a transmission resource correlated, in the stored correlation information, with the area deduced at the deducing; and

transmitting data to a second mobile communication apparatus by using the transmission resource selected at the selecting,

wherein if an autonomously managed area in which the data is directly transmitted between the mobile communication apparatus and the second mobile communication apparatus and a centrally managed area in which data transmission by the mobile communication apparatus and the second mobile communication apparatus is controlled by a base station are present,

storing attribute information indicating for each area from among the plurality of areas, whether the area is the autonomously managed area or the centrally managed area, and

determining, based on the attribute information, whether the deduced area is the autonomously managed area or the centrally managed area, and upon determining the deduced area to be the autonomously managed area, selecting the transmission resource correlated with the deduced area, and upon determining the deduced area to be the centrally managed area, selecting a transmission resource reported by the base station.

16. A communication system comprising a plurality of mobile communication apparatuses that directly transmit data to one another, wherein

each mobile communication apparatus of the plurality of mobile communication apparatuses includes:

a receiving unit that receives, as Vehicle Information and Communication Systems (VICS) information, correlation information correlating area and transmission resource;

a storage unit that stores therein the correlation information received by the receiving unit;

an area deducing unit that deduces in which area from among a plurality of areas a mobile communication apparatus is located;

a selecting unit that selects the transmission resource correlated, in the stored correlation information, with the area deduced by the area deducing unit; and

a transmitter that, using the transmission resource selected by the selecting unit, transmits data to another mobile communication apparatus,

wherein if an autonomously managed area in which the data is directly transmitted between the mobile communication apparatus and the other mobile communication apparatus and a centrally managed area in which data transmission by the mobile communication apparatus and the other mobile communication apparatus is controlled by a base station are present,

the storage unit stores therein attribute information indicating for each area from among the plurality of areas, whether the area is the autonomously managed area or the centrally managed area, and

the selecting unit, based on the attribute information stored by the storage unit, determines whether the deduced area is the autonomously managed area or the centrally managed area, and upon determining the deduced area to be the autonomously managed area, selects the transmission resource correlated with the deduced area, and upon determining the deduced area to be the centrally managed area, selects a transmission resource reported by the base station.