Mobile communication system, mobile station device, and network-side device

• US 20050201354A1
• Filed: 03/08/2005
• Published: 09/15/2005
• Est. Priority Date: 03/09/2004
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Watanabe, Masashi, Morihiro, Yoshifumi, Hosaka, Koji, Suto, Kiyotatsu, Kato, Yasuhiro
• Granted Patent: US 7,539,174 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements

Abstract

The present invention relates to a mobile communication system in which data is transmitted and received through a wireless transmission line between a mobile station device and a network-side device. A receiving-side device includes a retransmission request transmitter configured to transmit, to a transmitting-side device, a retransmission request for requesting retransmission processing on each data unit of the data, when a reception error is detected in the data unit. The transmitting-side device includes a retransmission time storage configured to store a retransmission time at which the retransmission processing is performed on the data unit; and a retransmission controller configured to control so as not to perform the retransmission processing on the data unit related to a received retransmission request, when the retransmission time of the data unit is stored and a difference between the retransmission time and a current time is shorter than a retransmission prohibition period.

Claims

1. A mobile communication system in which data is transmitted and received through a wireless transmission line between a mobile station device and a network-side device, wherein

a receiving-side device comprises:

a retransmission request transmitter configured to transmit, to a transmitting-side device, a retransmission request for requesting retransmission processing on each data unit of the data, when a reception error is detected in the data unit; and

the transmitting-side device comprises;

a retransmission time storage configured to store a retransmission time at which the retransmission processing is performed on the data unit; and

a retransmission controller configured to control so as not to perform the retransmission processing on the data unit related to a received retransmission request, when the retransmission time of the data unit is stored and a difference between the retransmission time and a current time is shorter than a retransmission prohibition period.

2. The mobile communication system as set forth in claim 1, wherein

the transmitting-side device further comprises a retransmission prohibition period manager configured to update the retransmission prohibition period, by adding a difference between target acknowledgement waiting buffer usage and current acknowledgement waiting buffer usage divided by transmission bandwidth, to a current retransmission prohibition period.

3. The mobile communication system as set forth in claim 1, wherein

the transmitting-side device further comprises a retransmission prohibition period manager configured to update the retransmission prohibition period, by adding a difference between target acknowledgement waiting buffer usage and current acknowledgement waiting buffer usage divided by an average data unit transmission rate, to a current retransmission prohibition period.

4. A mobile communication system in which data is transmitted and received through a wireless transmission line between a mobile station device and a network-side device, wherein

a transmitting-side device comprises:

a transmitter configured to transmit each data unit of the data to a receiving-side device; and

a retransmission controller configured to perform retransmission processing on the data unit, in accordance with a retransmission request from the receiving-side device; and

the receiving-side device comprises;

an acknowledgement issue prohibition period manager configured to manage an acknowledgement issue prohibition period during which issue of an acknowledgement on a received data unit is prohibited;

a retransmission request issue prohibition period manager configured to manage a retransmission request issue prohibition period during which, when a reception error is detected in the data unit, issue of a retransmission request for requesting retransmission processing on the data unit is prohibited; and

a control information transmitter configured to transmit the acknowledgement on the data unit received within the acknowledgment information issue prohibition period, after a lapse of the acknowledgment information issue prohibition period, and to transmit the retransmission request on the data unit in which a reception error is detected within the retransmission request issue prohibition period, after a lapse of the retransmission request issue prohibition period.

5. A mobile station device configured to transmit and receive data with a network-side device through a wireless transmission line, the mobile station device comprising:

a retransmission time storage configured to store a retransmission time at which retransmission processing is performed on each data unit of the data;

a retransmission request receiver configured to receive, from the network-side device, a retransmission request for requesting the retransmission processing on the data unit, when a reception error is detected in the data unit; and

a retransmission controller configured to control so as not to perform the retransmission processing on the data unit related to a received retransmission request, when a retransmission time of the data unit is stored and a difference between the retransmission time and a current time is shorter than a retransmission prohibition period.

6. A mobile station device configured to transmit and receive data with a network-side device through a wireless transmission line, the mobile station device comprising:

an acknowledgement issue prohibition period manager configured to manage an acknowledgement issue prohibition period during which issue of an acknowledgement on each data unit of the data transmitted from the network-side device is prohibited;

a retransmission request issue prohibition period manager configured to manage a retransmission request issue prohibition period during which, when a reception error is detected in the data unit, issue of a retransmission request for requesting the retransmission processing on the data unit is prohibited; and

a control information transmitter configured to transmit the acknowledgement on the data unit received within the acknowledgement issue prohibition period, after a lapse of the acknowledgement issue prohibition period, and to transmit the retransmission request on the data unit in which a reception error is detected within the retransmission request issue prohibition period, after a lapse of the retransmission request issue prohibition period.