WIRELESS LAN SYSTEM AND WIRELESS COMMUNICATION METHOD

• US 20080089263A1
• Filed: 10/09/2007
• Published: 04/17/2008
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: NEC Platforms, Ltd. (NEC Corporation)
• Original Assignee: NEC Infrontia Corporation (NEC Corporation)
• Inventors: TSUTSUMI, Takayuki
• Granted Patent: US 8,184,568 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• 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 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Each of a plurality of wireless terminals (105A, 105B) connected to a wireless LAN base station (104) notifies the base station of an address for receiving data by one-to-many communication from the base station when said wireless terminal executes a program using the one-to-many communication in the wireless LAN (S601). The base station records by relating the address notified from the wireless terminal with an address of the wireless terminal for one-to-one communication (S602). When the base station receives one-to-many communication data to be sent out the wireless LAN (S603), the base station converts an address of destination of the one-to-many communication data into the one-to-one communication address corresponding to said destination (S605) and transmits the data whose destination address has been converted into the one-to-one communication address (S609).

Claims

1. A wireless LAN system comprising:

a base station of a wireless LAN; and

a plurality of wireless terminals connected to the base station, wherein

each of the wireless terminals comprises an address notification unit notifying the base station of an address for receiving data by one-to-many communication from the base station when said wireless terminal executes a program using the one-to-many communication in the wireless LAN, and

the base station comprises a control unit recording by relating the address notified from the wireless terminal with an address of the wireless terminal for one-to-one communication, a converting unit converting an address of destination of one-to-many communication data to be sent out to the wireless LAN into the one-to-one communication address corresponding to said destination, and a wireless LAN unit transmitting the data whose destination address has been converted into the one-to-one communication address.

2. The wireless LAN system according to claim 1, wherein

the converting unit adds an identifier, indicating the conversion of the address of destination of the one-to-many communication data into the one-to-one communication address, to said data to be transmitted when the base station executes said conversion, and

each of the wireless terminals further comprising:

an address list unit storing the one-to-many communication address notified to the base station and the one-to-one communication address of said wireless terminal; and

a control unit determining whether the identifier is added to the data received from the base station, and

the control unit of each of the wireless terminals converts the destination of the data with the identifier into the one-to-many communication address notified to the base station and transferring said data with the identifier.

3. The wireless LAN system according to claim 1 or 2, wherein the wireless LAN unit of the base station sends out two types of sync signals to the wireless LAN in mutually different periods, and transmission timing of the one-to-many communication data is related to transmission timing of one of the two types of the sync signals.

4. A wireless terminal connected to a base station of a wireless LAN, comprising:

an address notification unit notifying the base station of an address for receiving data by one-to-many communication from the base station when the wireless terminal executes a program using the one-to-many communication in the wireless LAN.

5. The wireless terminal according to claim 4, further comprising:

an address list unit storing the one-to-many communication address notified to the base station and the one-to-one communication address of said wireless terminal; and

a control unit determining whether the identifier is added to the data received from the base station, and

wherein the control unit of each of the wireless terminals converts the destination of the data with the identifier into the one-to-many communication address notified to the base station and transferring said data with the identifier.

6. A wireless LAN base station to which a plurality of wireless terminals are connected, comprising:

a control unit recording by relating the address notified from the wireless terminal with an address of the wireless terminal for one-to-one communication;

a converting unit converting an address of destination of one-to-many communication data to be sent out to the wireless LAN into the one-to-one communication address corresponding to said destination; and

a wireless LAN unit transmitting the data whose destination address has been converted into the one-to-one communication address.

7. The wireless LAN base station according to claim 6, wherein the converting unit adds an identifier, indicating the conversion of the address of destination of the one-to-many communication data into the one-to-one communication address, to said data to be transmitted when the base station executes said conversion.

8. The wireless LAN base station according to claim 6 or 7, wherein the wireless LAN unit sends out two types of sync signals to the wireless LAN in mutually different periods, and transmission timing of the one-to-many communication data is related to transmission timing of one of the two types of the sync signals.

9. A wireless communication method for a base station of a wireless LAN and a plurality of wireless terminals connected to the base station, comprising:

notifying the base station of an address for receiving data by one-to-many communication from the base station by the wireless terminal which executes a program using the one-to-many communication in the wireless LAN;

recording by relating the address notified from said wireless terminal with an address of the wireless terminal for one-to-one communication;

converting an address of destination of one-to-many communication data to be sent out to the wireless LAN into the one-to-one communication address corresponding to said destination; and

transmitting the data whose destination address has been converted into the one-to-one communication address.

10. The wireless communication method according to claim 9, further comprising:

adding an identifier, indicating the conversion of the address of destination of the one-to-many communication data into the one-to-one communication address, to said data to be transmitted when the base station executes said conversion;

storing the one-to-many communication address notified to the base station and the one-to-one communication address of said wireless terminal;

determining whether the identifier is added to the data received from the base station;

converting the destination of the data with the identifier into the one-to-many communication address notified to the base station; and

transferring said data with the identifier.