BASE STATION, COMMUNICATION METHOD, AND MOBILE STATION

• US 20150350863A1
• Filed: 12/09/2013
• Published: 12/03/2015
• Est. Priority Date: 12/26/2012
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: TSUTSUI, Takahiro
• Granted Patent: US 9,693,209 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base station communicates with a mobile station. The base station includes a wireless communication unit and a control unit. The wireless communication unit transmits an alert periodically to the mobile station using a first channel, receives, from the mobile station, alert reception information related to reception of the alert, and transmits at least a part of the alert to the mobile station using a second channel different from the first channel. The control unit instructs the wireless communication unit, in response to the alert reception information, to transmit to the mobile station at least a part of the alert using the second channel.

Claims

1. A base station that communicates with a mobile station, the base station comprising:

a wireless communication unit that transmits an alert periodically to the mobile station using a first channel, the wireless communication unit receiving, from the mobile station, alert reception information related to reception of the alert, the wireless communication unit transmitting at least a part of the alert to the mobile station using a second channel different from the first channel; and

a control unit that instructs the wireless communication unit, in response to the alert reception information, to transmit to the mobile station at least a part of the alert using the second channel.

2. The base station according to claim 1, wherein the alert reception information includes information that requests transmission of the alert.

3. The base station according to claim 1, wherein the control unit determines based on a predetermined condition, whether to give, to the alert, information for deciding necessity of alert transmission with use of the second channel.

4. The base station according to claim 3, wherein the predetermined condition is at least one of:

priority degree of the alert;

transmission period of the alert; and

usage degree of resource used by the base station.

5. The base station according to claim 1, wherein the wireless communication unit transmits a plurality of types of alerts, using the first channel.

6. The base station according to claim 1, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

11. The base station according to claim 2, wherein the control unit determines based on a predetermined condition, whether to give, to the alert, information for deciding necessity of alert transmission with use of the second channel.

12. The base station according to claim 2, wherein the wireless communication unit transmits a plurality of types of alerts, using the first channel.

13. The base station according to claim 3, wherein the wireless communication unit transmits a plurality of types of alerts, using the first channel.

14. The base station according to claim 4, wherein the wireless communication unit transmits a plurality of types of alerts, using the first channel.

15. The base station according to claim 2, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

16. The base station according to claim 3, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

17. The base station according to claim 4, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

18. The base station according to claim 5, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

19. The base station according to claim 11, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

20. The base station according to claim 12, wherein the control unit includes a segment division unit that divides the alert into a plurality of segments.

7. A communication method for a base station communicating with a mobile station, the communication method comprising:

transmitting an alert periodically to the mobile station using a first channel;

receiving, from the mobile station, alert reception information related to reception of the alert;

transmitting at least a part of the alert to the mobile station using a second channel different from the first channel; and

instructing the base station, in response to the alert reception information, to transmit to the mobile station at least a part of the alert using the second channel.

8. The communication method according to claim 7, wherein the alert reception information includes information that requests transmission of the alert.

9. A mobile station that communicates with a base station, the mobile station comprising:

a wireless communication unit that receives an alert periodically from the base station using a first channel, the wireless communication unit transmitting, to the base station, alert reception information related to reception of the alert, the wireless communication unit receiving at least a part of the alert from the base station using a second channel different from the first channel; and

a control unit that decodes the alert, the control unit determining whether the alert is correctly decoded, the control unit instructing the wireless communication unit to transmit the alert reception information to the base station in a case of the control unit determining that the alert is correctly decoded.

10. The mobile station according to claim 9, wherein the alert reception information includes information that requests transmission of the alert.