Device and method for distributing software update for communication devices

1. A distribution device configured to distribute software through a plurality of base stations each connectible to a plurality of communication devices over a wireless communication network, said distribution device comprising:

an information acquisition part configured to acquire device identification information of a communication device subjected to distribution of the software among the plurality of communication devices and base-station identification information of a base station attributed to the communication device among the plurality of base stations over the wireless communication network from the communication device;

a determination part configured to determine a sequence of distributing the software to a threshold number or less of communication devices among the plurality of communication devices connectible to the base station based on a plurality of device identification information used to identify the threshold number or less of communication devices and the base-station identification information of the base station; and

a distribution part configured to distribute the software through the base station to the threshold number or less of communication devices among the plurality of communication devices according to the sequence determined by the determination part.

2. The distribution device according to claim 1 , wherein upon a completion of distributing the software to one or more communication devices among the plurality of communication devices in an attempt to distribute the software to the threshold number or less of communication devices, the distribution part starts to distribute the software to one or more communication devices selected from among the plurality of communication devices according to the sequence.

3. The distribution device according to claim 1 , wherein the distribution part is configured to determine the threshold number based on the size of the software.

4. The distribution device according to claim 1 , wherein the distribution part is configured to determine the threshold number based on a time to distribute the software.

5. The distribution device according to claim 1 , wherein the distribution part is configured to determine the threshold number based on the type of the base station.

6. The distribution device according to claim 1 , wherein when the distribution part is unable to start distributing the software to the communication device before a predetermined time lapses after acquisition of the base-station identification information from the communication device, the information acquisition part is configured to reacquire the base-station identification information of the base station attributed to the communication device.

7. The distribution device according to claim 6 , wherein when first base-station identification information previously acquired by the information acquisition part differs from second base-station identification information reacquired by the information acquisition part, the determination part redetermines the sequence with respect to a first base station which is attributed to the communication device when the information acquisition part acquires the first base-station identification information and a second base station which is attributed to the communication device when the information acquisition part acquires the second base-station identification information.

8. The distribution device according to claim 6 , wherein when the communication device is a mobile communication device, the information acquisition part is configured to reacquire the base-station identification information of the base station attributed to the communication device before distribution of the software by the distribution part by a predetermined time.

9. The distribution device according to claim 8 , wherein the information acquisition part is configured to determine the predetermined time based on a number of mobile communication devices connectible to the base station.

10. The distribution device according to claim 1 , wherein the determination part is configured to determine the sequence at an earlier timing when a ratio of mobile communication devices to the plurality of communication devices connectible to the base station is less than a threshold value rather than when the ratio of mobile communication devices is equal to or above the threshold value.

11. The distribution device according to claim 10 , wherein the determination part is configured to determine the sequence after a ready to distribute the software when the ratio of mobile communication devices to the plurality of communication devices connectible to the base station is equal to or above the threshold value.

12. The distribution device according to claim 1 , wherein when a predetermined number or more of communication devices serving as software-distributed subjects is located in a predetermined area covering the plurality of base stations, the distribution part is configured to distribute the software through the plurality of base stations to the threshold number or less of communication devices according to the sequence determined by the determination part.

13. The distribution device according to claim 1 , wherein the distribution part is configured to distribute the software at a timing at which the communication device does not execute a predetermined application.

14. A distribution method configured to distribute software through a plurality of base stations each connectible to a plurality of communication devices over a wireless communication network, said distribution method comprising:

acquiring device identification information of a communication device subjected to distribution of the software among the plurality of communication devices and base-station identification information of a base station attributed to the communication device among the plurality of base stations over the wireless communication network from the communication device;

determining a sequence of distributing the software to a threshold number or less of communication devices among the plurality of communication devices connectible to the base station based on a plurality of device identification information used to identify the threshold number or less of the communication devices and the base-station identification information of the base station; and

distributing the software through the base station to the threshold number or less of the communication devices among the plurality of communication devices according to the determined sequence.