Communicating system, communicating method, and base station

• US 20050207370A1
• Filed: 03/07/2005
• Published: 09/22/2005
• Est. Priority Date: 03/08/2004
• Status: Active Grant

• Current Assignee: National Institute of Information and Communications Technology
• Original Assignee: National Institute of Information and Communications Technology
• Inventors: Harada, Hiroshi
• Granted Patent: US 7,339,919 B2
• Time in Patent Office: Days
• US Class Current: 370/321
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 72/569 of the traffic information

Abstract

A communication system, a communicating method and a base station are provided. When a base station generates an FCM, the base station detects the use rate of a transmission buffer and decides how slots of a frame of an uplink channel are structured. When the use rate of the transmission buffer is high, the base station designates the number of ACTSs to 0 so that the base station does not accept registration requests and so forth from mobile stations. When the use rate of the transmission buffer is low, the base station designates the number of ACTSs to 1. When the number of mobile stations is large as in a large convention hall, the base station generates TDMA frames each of which has only ACTSs. The base station can decide the number of ATCSs corresponding to the probability of which registration requests and so forth from mobile stations collide.

Claims

1. A communicating system having a base station and a mobile station that communicate with each other simultaneously using frames of an uplink channel and a downlink channel, a frame of the uplink channel being composed of a plurality of slots, the mobile station transmitting a predetermined connection request to the base station with a first type slot of a frame of the uplink channel, the base station comprising:

recording means for temporarily recording data to be transmitted to the mobile station through the downlink channel; and

deciding means for deciding the number of first type slots contained in a frame of the uplink channel corresponding to at least one of the use rate of the recording means and the probability of which the first type slots transmitted collide between the mobile stations.

2. The communicating system as set forth in claim 1,

wherein the deciding means is configured to designate the number of first type slots contained in a frame of the uplink channel so that the number of first type slots is reversely proportional to the use rate of the recording means.

3. The communicating system as set forth in claim 2,

wherein when the use rate of the recording means is larger than a predetermined value, the deciding means is configured to designate the number of first type slots contained in the frame of the uplink channel to zero, and otherwise the deciding means is configured to designate the number of first type slots to 1 or larger.

4. A communicating method for a base station and a mobile station that communicate with each other simultaneously using frames of an uplink channel and a downlink channel, a frame of the uplink channel being composed of a plurality of slots, the mobile station transmitting a predetermined connection request to the base station with a first type slot of a frame of the uplink channel, the base station having recording means for temporarily recording data to be transmitted to be mobile station through the downlink channel, the communicating method comprising:

deciding the number of first type slots contained in a frame of the uplink channel corresponding to at least one of the use rate of the recording means and the probability of which the first type slots transmitted collide between the mobile stations.

5. The communicating method as set forth in claim 4,

wherein deciding is performed by designating the number of first type slots contained in a frame of the uplink channel so that the number of first type slots is reversely proportional to the use rate of the recording means.

6. The communicating method as set forth in claim 5,

wherein when the use rate of the recording means is larger than a predetermined value, deciding is performed by designating the number of first type slots contained in the frame of the uplink channel to zero, and otherwise the deciding step is performed by designating the number of first type slots to 1 or larger.

7. A base station of a communicating system that communicates with a mobile station simultaneously using frames of an uplink channel and a downlink channel, a frame of the uplink channel being composed of a plurality of slots, the base station receiving a predetermined connection request from the mobile station with a first type slot of a frame of the uplink channel, the base station comprising:

recording means for temporarily recording data to be transmitted to the mobile station through the downlink channel; and

deciding means for deciding the number of first type slots contained in a frame of the uplink channel corresponding to at least one of the use rate of the recording means and the probability of which the first type slots transmitted collide between the mobile stations.

8. The base station as set forth in claim 7,

wherein the deciding means is configured to designate the number of first type slots contained in a frame of the uplink channel so that the number of first type slots is reversely proportional to the use rate of the recording means.

9. The base station as set forth in claim 8,

wherein when the use rate of the recording means is larger than a predetermined value, the deciding means is configured to designate the number of first type slots contained in the frame of the uplink channel to zero, and otherwise the deciding means is configured to designate the number of first type slots to 1 or larger.