Base station, control device, communication system and communication method

• US 7,486,638 B2
• Filed: 01/29/2003
• Issued: 02/03/2009
• Est. Priority Date: 01/31/2002
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Ofuji, Yoshiaki, Abeta, Sadayuki, Sawahashi, Mamoru
• Primary Examiner(s): Rao; Seema S.
• Assistant Examiner(s): WONG, XAVIER S
• Application Number:
  US10/352,862
• Publication Number:
  US 20030142658A1
• Time in Patent Office: 2,197 Days
• Field of Search: 370/349, 370/324, 370/278, 370/328, 370/329, 370/338, 370/341, 370/395.4
• US Class Current: 370/329
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base station includes an acquisition unit for acquiring a packet transmitted from a terminal device to a mobile station, a priority calculation unit for calculating priority of transmission of the packet acquired by the acquisition unit to the mobile station, a weight processing unit for conducting weighting on the priority of the packet calculated by the priority calculation unit, a channel control unit for assigning a channel for transmission of the packet to the mobile station, to the packet based on the priority of the packet weighted by the weight processing unit, and a transmission unit for transmitting the packet to the mobile station on the channel assigned by the channel control unit.

Claims

1. A base station, comprising:

an acquisition unit configured to acquire from a terminal device a plurality of packets to be transmitted to a mobile station;

a priority calculation unit configured to calculate a priority of transmission of one packet of said plurality of packets relative to at least another packet of said plurality of packets;

a weight processing unit configured to conduct weighting on the priority of the one packet calculated by the priority calculation unit to produce a weighted priority;

a channel control unit configured to assign a channel for transmission to the one packet based on the weighted priority; and

a transmission unit configured to transmit the one packet to the mobile station on the channel assigned by the channel control unit, wherein

the weight processing unit conducts weighting on the priority based on a reception state of the mobile station, wherein the reception state is judged based on a status of a transmission path formed between the transmission unit and the mobile station, and the priority calculation unit calculates the priority based on whether the one packet is a retransmission packet transmitted to the mobile station again by the transmission unit, a status of a transmission path formed between the transmission unit and the mobile station, and quality of service of the one packet.

2. The base station according to claim 1, wherein the weight processing unit conducts weighting on the priority based on a predetermined transmission rate of the one packet.

3. The base station according to claim 1, wherein the weight processing unit conducts weighting on the priority based on a time during which the transmission unit does not transmit the one packet, since the acquisition unit has acquired the one packet.

4. The base station according to claim 1, wherein the priority calculation unit calculates the priority based on a time during which the transmission unit does not transmit the one packet, since the acquisition unit has acquired the one packet.

5. The base station according to claim 1, wherein the priority calculation unit calculates the priority based on a predetermined transmission rate of the one packet.

6. The base station according to claim 1, wherein the priority is calculated by using a plurality of kinds of information, and wherein the priority calculation unit comprises:

a plurality of individual priority calculation units configured to calculate a plurality of individual priorities for said one packet based on the kinds of information; and

a priority unification unit configured to unify the individual priorities calculated by the individual priority calculation units and to determine the priority.

7. The base station according to claim 6, wherein the priority unification unit determines the priority by multiplying the individual priorities respectively by coefficients and adding up the individual priorities respectively multiplied by the coefficients.

8. A control device, comprising:

a priority calculation unit configured to calculate a priority of transmission of one packet of a plurality of packets relative to at least another packet of said plurality of packets;

a weight processing unit configured to conduct weighting on the priority of the one packet calculated by the priority calculation unit to produce a weighted priority; and

a channel control unit configured to assign a transmission channel to the one packet based on the weighted priority, wherein

the weight processing unit conducts weighting on the priority based on a reception state of a mobile station, wherein the reception state is judged based on a status of a transmission path formed between a transmission unit and the mobile station, and the priority calculation unit calculates the priority based on whether the one packet is a retransmission packet transmitted to the mobile station again by the transmission unit, a status of a transmission path formed between the transmission unit and the mobile station, and quality of service of the one packet.

9. A communication system, comprising:

a mobile station configured to conduct packet transmission and reception; and

a base station, wherein the base station comprises;

an acquisition unit configured to acquire from a terminal device a plurality of packets to be transmitted to a mobile station;

a priority calculation unit configured to calculate a priority of transmission of one packet of said plurality of packets relative to at least another packet of said plurality of packets;

a weight processing unit configured to conduct weighting on the priority of the one packet calculated by the priority calculation unit to produce a weighted priority;

a channel control unit configured to assign a channel for transmission to the one packet based on the weighted priority; and

a transmission unit configured to transmit the one packet to the mobile station on the channel assigned by the channel control unit, wherein

the weight processing unit conducts weighting on the priority based on a reception state of the mobile station, wherein the reception state is judged based on a status of a transmission path formed between the transmission unit and the mobile station, and the priority calculation unit calculates the priority based on whether the one packet is a retransmission packet transmitted to the mobile station again by the transmission unit, a status of a transmission path formed between the transmission unit and the mobile station, and quality of service of the one packet.

10. A communication method using a base station, comprising:

acquiring from a terminal device a plurality of packets to be transmitted to a mobile station;

calculating a priority of transmission of one packet of said plurality of packets relative to at least another packet of said plurality of packets;

conducting weighting on the calculated priority of the one packet to produce a weighted priority;

assigning a channel for transmission to the packet based on the weighted priority of the one packet; and

transmitting from a transmission unit the one packet to the mobile station on the assigned channel, wherein

the conducting weighting on the priority is based on a reception state of the mobile station, wherein the reception state is judged based on a status of a transmission path formed between the transmission unit and the mobile station, and the calculating the priority of transmission is based on whether the one packet is a retransmission packet transmitted to the mobile station again by the transmission unit, a status of a transmission path formed between the transmission unit and the mobile station, and quality of service of the one packet.

11. The communication method according to claim 10, wherein the base station conducts weighting on the priority based on a predetermined transmission rate of the one packet.

12. The communication method according to claim 10, wherein the base station conducts weighting on the priority based on a time during which the base station does not transmit the one packet, since the base station has acquired the one packet.

13. The communication method according to claim 10, wherein the base station calculates the priority based on a predetermined quality of service of the one packet.

14. The communication method according to claim 10, wherein the priority is calculated by using a plurality of kinds of information, and wherein the base station calculates a plurality of individual priorities respectively based on the kinds of information used to calculate the priority, and the base station unifies the individual priorities and determines the priority.

15. The communication method according to claim 14, wherein the base station determines the priority by multiplying the individual priorities respectively by coefficients and adding up the individual priorities respectively multiplied by the coefficients.