Wireless base station and a wireless phone

• US 7,085,572 B2
• Filed: 08/24/2004
• Issued: 08/01/2006
• Est. Priority Date: 02/14/2000
• Status: Expired due to Term

• Current Assignee: Kyocera Corporation
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Ishida, Akira
• Primary Examiner(s): Orgad, Edan
• Application Number:
  US10/923,825
• Publication Number:
  US 20050037788A1
• Time in Patent Office: 707 Days
• Field of Search: 455/562.1, 455/456.2, 455/513, 455/436, 455/450, 455/414.1, 455/452.1, 455/69, 455/434, 370/329, 370/431, 370/342, 342/383, 342/11, 375/267, 375/299, 375/347
• US Class Current: 455/450
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

On receiving a link channel assignment request or a link channel reassignment request from a mobile station, a wireless base station specifies a unique word (UW) that is not assigned to any other mobile stations, and sends a channel assignment notification containing the specified UW to the requesting mobile station. The base station also sends the specified UW to its user processing unit, which extracts a signal sent from the requesting mobile station and generates a signal to be sent to this mobile station. The base station then defines a reference signal based on the sent UW, and adjusts each weight vector by using the defined reference signal and a signal estimated to have been sent from the requesting mobile station, thereby directing the directivity pattern to the requesting mobile station.

Claims

1. A wireless phone that wirelessly communicates with a wireless base station capable of transmitting a different word for synchronization to each of a plurality of mobile phones with which the wireless base station wirelessly communicates by using space division multiplexing, comprising:

receiving means for receiving the word for synchronization sent from a wireless base station; and

sending means for sending the word for synchronization to the wireless base station, the word for synchronization being sent preceding a main data that is a content of communication,

wherein the wireless base station extracts communication data relating to a wireless phone with which the wireless base station is communicating, by;

(a) defining a reference signal containing a word for synchronization that is sent to the wireless phone with which the wireless base station is communicating;

(b) obtaining a second signal that is estimated to be a signal relating to the communication data by forming a directivity pattern, using a plurality of first signals that are seguentially received via an antenna;

(c) sequentially calculating based on the reference signal and the second signal;

(d) adiusting the second signal by seguentially adiusting the directivity pattern by reflecting a result of the calculation; and

(e) regarding the adjusted second signal as communication data sent from the wireless phone with which the wireless base station is communicating.

2. A wireless phone, comprising:

receiving means for receiving a word for synchronization sent from a wireless base station; and

sending means for sending the word for synchronization to the wireless base station, the word for synchronization being sent preceding a main data that is a content of communication, wherein

the wireless base station extracts communication data relating to a wireless phone with which the wireless base station is communicating, by;

(a) defining a reference signal containing a word for synchronization that is sent to the wireless phone with which the wireless base station is communicating;

(b) obtaining a second signal that is estimated to be a signal relating to the communication data by forming a directivity pattern, using a plurality of first signals that are sequentially received via an antenna;

(c) sequentially calculating based on the reference signal and the second signal;

(d) adjusting the second signal by sequentially adjusting the directivity pattern by reflecting a result of the calculation; and

(e) regarding the adjusted second signal as communication data sent from the wireless phone with which the wireless base station is communicating.