WIRELESS TERMINAL CALL METHOD AND WIRELESS ACCESS SYSTEM

• US 20110038317A1
• Filed: 03/24/2009
• Published: 02/17/2011
• Est. Priority Date: 03/24/2008
• Status: Active Grant

• Current Assignee: Nippon Telegraph and Telephone Corporation
• Original Assignee: Nippon Telegraph and Telephone Corporation
• Inventors: Nuno, Fusao, Shimizu, Yoshitaka
• Granted Patent: US 8,774,089 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless terminal receives a first broadcast signal transmitted from a wireless base station; detects whether a part of a wireless terminal ID of the own wireless terminal is included in the first broadcast signal received in the broadcast signal reception or not and determines that the second broadcast signal is to be continuously received when the part of the wireless terminal ID is included; and receives the second broadcast signal when it is determined in the broadcast signal determination that the second broadcast signal is to be received, stops receiving data transmitted from the wireless base station when assignment information to be transmitted to the own wireless terminal is not present in the received second broadcast signal, and receives data transmitted from the wireless base station to the own wireless terminal based on the information on the assignment position of the wireless slot included in the second broadcast signal when the assignment information to be transmitted to the own wireless terminal is present in the received second broadcast signal.

Claims

1. A wireless terminal call method in which a plurality of wireless terminals each having a unique ID share a wireless frame including a plurality of wireless slots and a wireless base station calls the wireless terminals using a broadcast slot of the wireless frame, the wireless terminal call method comprising:

generating, by the wireless base station, a first broadcast signal including parts of wireless terminal IDs of the wireless terminals to be called and a second broadcast signal including information on assignment positions of the wireless slots for the wireless terminals to be called;

generating, by the wireless base station, a wireless frame including the first broadcast signal and the second broadcast signal subsequent to the first broadcast signal in the broadcast slot; and

transmitting, by the wireless base station, the wireless frame to the wireless terminals,

receiving, by the wireless terminals, the first broadcast signal transmitted from the wireless base station;

detecting, by the wireless terminals, whether the part of the wireless terminal ID of the own wireless terminal is included in the first broadcast signal received in the broadcast signal reception or not and determining that the second broadcast signal is to be continuously received when the part of the wireless terminal ID is included; and

receiving, by the wireless terminals, the second broadcast signal when it is determined in the broadcast signal determination that the second broadcast signal is to be received, stopping receiving data transmitted from the wireless base station when assignment information to be transmitted to the own wireless terminal is not present in the received second broadcast signal, and receiving data transmitted from the wireless base station to the own wireless terminal based on the information on the assignment position of the wireless slot included in the second broadcast signal when the assignment information to be transmitted to the own wireless terminal is present in the received second broadcast signal.

2. The wireless terminal call method according to claim 1, the wireless terminal call method further comprising:

dividing, by the wireless base station, the wireless terminals into a plurality of groups and setting a super frame including a plurality of the wireless frames;

presetting, by the wireless base station, the corresponding wireless frame from the plurality of wireless frames in the super frame for each group, and

receiving, by the wireless terminal, the first broadcast signal or the first and second broadcast signals in the preset wireless frame.

3. The wireless terminal call method according to claim 1 or 2, wherein the first broadcast signal includes call information having a fixed length and including classification information and wireless terminal ID information,

the classification information is at least one of the number of partial ID patterns included in the wireless terminal ID information, lengths of the partial ID patterns, and information associated with the number and lengths of the partial ID patterns,

the wireless terminal ID information indicates the plurality of partial ID patterns, and

the partial ID pattern indicates part or all of the wireless terminal ID of the wireless terminals to be called.

4. The wireless terminal call method according to claim 3, wherein the number of wireless terminals to be called is used as the classification information.

5. The wireless terminal call method according to claim 4, wherein a bit length of one partial ID pattern in the wireless terminal ID information varies with the number of partial ID patterns included in the wireless terminal ID information.

6. The wireless terminal call method according to claim 5, wherein ID information of the wireless terminal designated in the wireless terminal ID information is represented in a bit pattern for each wireless terminal to be called, and the bit pattern is a bit pattern of a plurality of bits which are all or part of the ID of the wireless terminal to be called, the bit pattern being a bit pattern corresponding to a bit length of one partial ID pattern designated in the wireless terminal ID information.

7. The wireless terminal call method according to claim 6, wherein when the bit patterns of the plurality of bits of the IDs of the plurality of wireless terminals among the wireless terminals to be called are common in a range of the bit length of one partial ID pattern designated in the wireless terminal ID information, the wireless base station regards the plurality of wireless terminals having the common bit pattern as one wireless terminal to generate the wireless terminal ID information.

8. A wireless access system in which a plurality of wireless terminals each having a unique ID share a wireless frame including a plurality of wireless slots and a wireless base station calls the wireless terminals using a broadcast slot of the wireless frame, wherein the wireless base station comprises:

a broadcast signal generation unit which generates a first broadcast signal including parts of wireless terminal IDs of the wireless terminals to be called and a second broadcast signal including information on assignment positions of the wireless slots for the wireless terminals to be called;

a wireless frame generation unit which generates a wireless frame including the first broadcast signal and the second broadcast signal subsequent to the first broadcast signal in the broadcast slot; and

a first transceiver unit which transmits the wireless frame to the wireless terminals and receives wireless signals transmitted from the wireless terminals, and

wherein the wireless terminals comprises;

a second transceiver unit which receives the first broadcast signal transmitted from the first transceiver unit and transmits the wireless signal to the wireless base station;

a broadcast signal determination unit which detects whether the part of the wireless terminal ID of the own wireless terminal is included in the first broadcast signal received by the second transceiver unit or not and determines that the second broadcast signal is to be continuously received when the part of the wireless terminal ID is included;

a broadcast signal reception unit which receives the second broadcast signal subsequent to the first broadcast signal when the broadcast signal determination unit determines that the second broadcast signal is to be received; and

a data reception unit which stops receiving data transmitted from the wireless base station when assignment information to be transmitted to the own wireless terminal is not present in the received second broadcast signal, and receives data transmitted from the wireless base station to the own wireless terminal based on information on the assignment position of the wireless slot included in the second broadcast signal when the assignment information to be transmitted to the own wireless terminal is present in the received second broadcast signal.