Base Station, Scheduling Method, And Wireless Terminal

• US 20100009693A1
• Filed: 09/16/2009
• Published: 01/14/2010
• Est. Priority Date: 03/27/2007
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kiryu, Ryusuke, KAWABATA, Kazuo
• Application Number:
  US12/561,036
• Publication Number:
  US 20100009693A1
• 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 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

In a base station, a received signal strength calculation unit calculates the received signal strength of data sent by wireless terminals. A scheduler re-allocates the wireless resource next to a wireless terminal that will cause the smallest change from the received signal strength of the currently allocated wireless terminal. The base station can receive data sent from the wireless terminals in such a manner that the received signal strength varies gradually, and degradation in quality of reception can be suppressed.

Claims

1. A base station that performs scheduling of wireless terminals, the base station comprising:

a received signal strength calculation unit that calculates received signal strength of data sent by the wireless terminals; and

a scheduler that allocates communication to a wireless terminal which will cause the smallest change from the received signal strength of a currently allocated wireless terminal.

2. The base station according to claim 1, wherein the received signal strength calculation unit calculates the received signal strength on the basis of request signals sent by the wireless terminals.

3. The base station according to claim 1, further comprising:

a distance measurement unit that measures distances between the base station and the wireless terminals,

wherein the received signal strength calculation unit calculates the received signal strength on the basis of the distances.

4. The base station according to claim 1, wherein the scheduler allocates a wireless resource to the wireless terminals in order of severity of time constraints on allocation permission time for the wireless resource.

5. The base station according to claim 1, wherein the scheduler allocates a wireless resource to wireless terminals on a side of more wireless terminals to be scheduled.

6. The base station according to claim 1, wherein the scheduler allocates the wireless resource to a wireless terminal having severe constraints on allocation permission time for the wireless resource, on a side of more wireless terminals.

7. A wireless terminal that receives scheduling information indicating transmission allocation, the wireless terminal comprises:

receiving from a base station a result of scheduling in which transmission is allocated to a wireless terminal that will cause the smallest change from received signal strength of a currently allocated wireless terminal, on the basis of received signal strength of data transmitted by wireless terminals that include the wireless terminal in question; and

sending data in accordance with the result of scheduling.

8. A scheduling method for scheduling wireless terminals, the scheduling method comprising:

calculating received signal strength of data sent by the wireless terminals; and

allocating communication to a wireless terminal that will cause the smallest change from the received signal strength of a currently allocated wireless terminal.