Base Station Device and Channel Allocation Method

• US 20090305713A1
• Filed: 03/15/2007
• Published: 12/10/2009
• Est. Priority Date: 03/27/2006
• Status: Abandoned Application

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Kimura, Shigeru, Yamazaki, Chiharu
• Application Number:
  US12/294,218
• Publication Number:
  US 20090305713A1
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Upon receipt of a new channel allocation request from a mobile communication terminal, a suitable channel is allocated. A base station device performs communication with communication terminals by implementing an adaptive process using a plurality of antennas, and includes an interference recognizing unit that recognizes a level of interference on empty channels for use in the communication, a channel selector that selects an empty channel to be allocated based on a result recognized by the interference recognizing unit, and a channel allocator that, when there is a new channel allocation request from a communication terminal, allocates the empty channel selected by the channel selector to that communication terminal.

Claims

1. A base station device that performs communication with communication terminals by implementing an adaptive process using a plurality of antennas, the base station device comprising:

an interference recognizing unit that recognizes a level of interference on empty channels for use in the communication;

a channel selector that selects an empty channel to be allocated based on a result recognized by the interference recognizing unit; and

a channel allocator that allocates the empty channel selected by the channel selector to a communication terminal, in accordance with a new channel allocation request from the communication terminal.

2. The base station device according to claim 1, wherein the interference recognizing unit recognizes the validity of the adaptive process based on the power of the interference wave on the empty channel.

3. The base station device according to claim 1, wherein the interference recognizing unit makes the recognition based on an amount of variation in the interference power on the empty channel during a predetermined period.

4. The base station device according to claim 1, wherein the interference recognizing unit makes the recognition based on an amount of phase rotation of a received signal on the empty channel.

5. The base station device according to claim 1, wherein the interference recognizing unit recognizes the level of interference after the adaptive process is implemented on the empty channel.

6. A channel allocation method in a base station device that performs communication with communication terminals by implementing an adaptive process using a plurality of antennas, the method comprising:

recognizing a level of interference on empty channels for use in the communication, upon receipt of a new channel allocation request from a mobile communication terminal;

selecting an empty channel to be allocated, the selection being made based on the validity of the adaptive process recognized by recognizing the level of interference; and

allocating the selected empty channel to the mobile communication terminal.