Communication control system, communication control method, base station and mobile station

• US 20030114167A1
• Filed: 12/09/2002
• Published: 06/19/2003
• Est. Priority Date: 12/10/2001
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Kayama, Hidetoshi, Chen, Lan, Umeda, Narumi
• Granted Patent: US 7,308,282 B2
• Time in Patent Office: Days
• US Class Current: 455/453
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 72/52 based on load

Abstract

It is an object of the present invention to control the traffic that flows in a radio link to ensure the stability of the network as well as to prevent the deterioration of the communication quality due to the transmission of packets exceeding the capacity, and to increase the communication capacity. The invention relates to a communication control system in a packet mobile communication that transmits a downlink packet 3 from a base station 10 to a mobile station 30 via a radio network. According to the invention, the base station 10 comprises a transmission determiner 11 that determines whether or not to transmit the downlink packet 3 to the radio network in accordance with the state of congestion of the radio network and the traffic type (DSCP) of the downlink packet 3.

Claims

1. A communication control system in a packet mobile communication that transmits a downlink packet from a base station to a mobile station via a radio network, wherein

said base station comprises a transmission determiner for determining whether or not to transmit the downlink packet to the radio network in accordance with the state of congestion of said radio network and the traffic type of said downlink packet.

2. The communication control system according to claim 1, wherein said transmission determiner estimates the state of congestion of said radio network in accordance with the state of use of transmission power resources in said base station.

3. The communication control system according to claim 2, wherein said transmission determiner estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said downlink packet with the state of use of transmission power resources in said base station.

4. The communication control system according to claim 1, wherein said traffic type is identified by means of a code point of a DiffServ IP packet (DSCP).

5. A communication control system in a packet mobile communication that transmits an uplink packet from a mobile station to a base station via a radio network, wherein said base station comprises

an admission determiner for determining whether or not to admit the uplink packet transmitted from said mobile station via the radio network in accordance with the state of congestion of said radio network and the traffic type of said uplink packet, and

a notifier for notifying the determined result to said mobile station;

and

said mobile station comprises a transmission determiner for determining whether or not to transmit said uplink packet to said radio network in accordance with said notified result.

6. The communication control system according to claim 5, wherein said admission determiner estimates the state of congestion of said radio network in accordance with the state of use of reception power resources in said base station.

7. The communication control system according to claim 6, wherein said admission determiner estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said uplink packet with the state of use of reception power resources in said base station.

8. The communication control system according to claim 5, wherein said traffic type is identified by means of a code point of a DiffServ IP packet (DSCP).

9. A communication control method in a packet mobile communication that transmits a downlink packet from a base station to a mobile station via a radio network, comprising the step of;

A) determining, in said base station, whether or not to transmit the downlink packet to the radio network in accordance with the state of congestion of said radio network and the traffic type of said downlink packet.

10. The communication control method according to claim 9, wherein said base station, in said step A), estimates the state of congestion of said radio network in accordance with the state of use of transmission power resources in said base station.

11. The communication control method according to claim 10, wherein said base station, in said step A), estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said downlink packet with the state of use of transmission power resources in said base station.

12. The communication control method according to claim 9, wherein said traffic type is identified by means of a code point of a DiffServ IP packet (DSCP).

13. A communication control method in a packet mobile communication that transmits an uplink packet from a mobile station to a base station via a radio network, comprising the steps of:

A) determining, in said base station, whether or not to admit the uplink packet transmitted from said mobile station via the radio network in accordance with the state of congestion of said radio network and the traffic type of said uplink packet;

B) notifying, in said base station, the determined result to said mobile station; and

C) determining, in said mobile station, whether or not to transmit said uplink packet to said radio network in accordance with said notified result.

14. The communication control method according to claim 13, wherein said base station, in said step A), estimates the state of congestion of said radio network in accordance with the state of use of reception power resources in said base station.

15. The communication control method according to claim 14, wherein said base station, in said step A), estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said uplink packet with the state of use of reception power resources in said base station.

16. The communication control method according to claim 13, wherein said traffic type is identified by means of a code point of a DiffServ IP packet (DSCP).

17. Abase station that transmits a downlink packet to a mobile station via a radio network, comprising a transmission determiner for determining whether or not to transmit the downlink packet to the radio network in accordance with the state of congestion of said radio network and the traffic type of said downlink packet.

18. The base station according to claim 17, wherein said transmission determiner estimates the state of congestion of said radio network in accordance with the state of use of transmission power resources in said base station.

19. The base station according to claim 18, wherein said transmission determiner estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said downlink packet with the state of use of transmission power resources in said base station.

20. Abase station according to claim 17, wherein said traffic type is identified by means of code point of a DiffServ IP packet (DSCP).

21. A base station that receives an uplink packet from a mobile station via a radio network, comprising:

an admission determiner for determining whether or not to admit the uplink packet transmitted from said mobile station via the radio network in accordance with the state of congestion of said radio network and the traffic type of said uplink packet; and

a notifier for notifying the determined result to said mobile station.

22. The base station according to claim 21, wherein said admission determiner estimates the state of congestion of said radio network in accordance with the state of use of reception power resources in said base station.

23. The base station according to claim 22, wherein said admission determiner estimates the state of congestion of said radio network by comparing a predetermined threshold set for each traffic type of said uplink packet with the state of use of reception power resources in said base station.

24. The base station according to claim 21, wherein said traffic type is identified by means of a code point of a DiffServ IP packet (DSCP).

25. A mobile station that transmits an uplink packet to a base station via a radio network, comprising a transmission determiner for determining whether or not to transmit said uplink packet to said radio network in accordance with the state of congestion of said radio network and the traffic type of said uplink packet.