Method for scheduling packet data transmission

• US 7,376,110 B2
• Filed: 05/21/2003
• Issued: 05/20/2008
• Est. Priority Date: 05/05/1997
• Status: Expired due to Term

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Honkasalo, Zhi-Chun, Kapadia, Sona, Noneman, John, Liimatainen, Pasi
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US10/442,625
• Publication Number:
  US 20030210674A1
• Time in Patent Office: 1,826 Days
• Field of Search: None
• US Class Current: 370/338
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 36/00 Hand-off or reselection arrangements
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

In a packet data transmission and reception system, a media access control (MAC) message is broadcast by a base station to a plurality of mobile stations. The MAC message contains packet data transmission scheduling information which allows the base station to preemptively control mobile station access to traffic channels in order to maximize the efficiency of packet data transmissions and allow scheduling consideration including priority access, quality of service and maximum bytes per transfer. The MAC message consists of a control frame structure, which comprises scheduling parameters including MAC IDs fields, activity fields, and a field representing the number of free traffic channels in a cell. These parameters enable multiple mobile stations to share, in a time multiplexed fashion, traffic channels for packet data transmission on CDMA based mobile communication systems.

Claims

1. A wireless telecommunications system comprising at least one base station, said at least one base station for assigning one of a plurality of MAC_IDs to each of a plurality of mobile stations within a cell served by said at least one base station and allocating a packet data channel for a selected mobile station of said plurality of mobile stations, wherein said at least one base station transmits a selected MAC_ID of said plurality of MAC_IDs on a control channel to said plurality of mobile stations, said selected MAC_ID assigned to said selected mobile station, and wherein said selected MAC_ID is associated on said control channel with activity information that indicates to said selected mobile station that a packet data channel has been allocated to said selected mobile station by said at least one base station.

2. The wireless telecommunications system of claim 1, wherein each of said plurality of MAC_IDs is temporary and valid for the mobile station to which it is assigned.

3. The wireless telecommunications system of claim 1, wherein said at least one base station receives data packets from said selected mobile station according to said activity information.

4. The wireless telecommunication system of claim 1, wherein said at least one base station transmits data packets to said selected mobile station according to said activity information.

5. A method of operating a base station comprising:

assigning one of a plurality of MAC_IDs to each of a plurality of mobile stations operating within a cell served by the base station; and

,

allocating a packet data channel for a selected mobile station of said plurality of mobile stations, wherein said allocating comprises;

transmitting a selected MAC_ID of said plurality of MAC_IDs on a control channel to said plurality of mobile stations, said selected MAC_ID assigned to said selected mobile station, wherein said selected MAC_ID is associated on said control channel with activity information that indicates to said selected mobile station that a packet data channel has been allocated to said selected mobile station by the base station.

6. The method of claim 5, further comprising receiving data packets at the base station, from said selected mobile station;

according to said activity information.

7. The method of claim 6, further comprising the step of transmitting data packets from the base station to said selected mobile station according to said activity information.

16. The method of claim 5, wherein the activity information is associated with the selected MAC_ID according to a position of the activity information in a frame structure transmitted on the control channel by the base station.

17. The method of claim 16, wherein the activity information associated with the selected MAC_ID comprises a one-bit wide field of the frame structure.

8. A wireless telecommunications system comprising:

a plurality of base stations including a selected base station, said selected base station for assigning one of a first plurality of MAC IDs to each of a plurality of mobile stations within a cell served by said selected base station; and

at least one mobile station, said at least one mobile station for receiving a MAC ID assignment from each of said plurality of base stations, and storing a second plurality of MAC IDs in a memory, and for monitoring a selected control channel of a plurality of control channels of the plurality of base stations, wherein said selected control channel is associated with said selected base station and carries to the mobile station packet data activity information associated with a selected MAC ID of said first plurality of MAC IDs, said selected MAC ID associated with said at least one mobile station, decoding said selected MAC ID, and, in response to decoding said selected MAC ID in the mobile station, determining from said activity information that a packet data channel is allocated to said mobile station by said selected base station.

9. The wireless telecommunications system of claim 8, wherein each of said second plurality of MAC IDs is temporary and valid for the selected base station of said plurality of base stations that assigned it, and wherein multiple base stations may assign different MAC IDs to the mobile station.

10. The wireless telecommunications system of claim 8, wherein said at least one mobile station transmits data packets to said selected base station, according to said activity information.

11. The wireless telecommunications system of claim 8, wherein said selected base station transmits data packets to said at least one mobile station according to said activity information.

12. A method of operating a mobile station;

said method comprising;

receiving, at the mobile station, a MAC_ID assignment from each of a plurality of base stations;

storing a plurality of MAC_ID in a memory of the mobile station, each of said plurality of MAC_IDs assigned by one of said plurality of base stations;

monitoring a selected control channel of a plurality of control channels of the plurality of base stations, wherein said selected control channel is associated with a selected base station of the plurality of base stations and carries to the mobile station packet data activity information associated with a selected MAC_ID of said plurality of MAC_IDs, said selected MAC_ID assigned to the mobile station;

decoding, in the mobile station, said selected MAC_ID; and

in response to decoding said selected MAC_ID, determining from said activity information that a packet data channel is allocated to the mobile station by said selected base station.

13. The method of claim 12, wherein each of the plurality of MAC_IDs is temporary and valid for the base station of the plurality of base stations that assign it and wherein multiple base stations may assign different MAC_IDs to the mobile station.

14. The method of claim 12, further comprising transmitting data packets from the mobile station to said selected base station according to said activity information.

15. The method of claim 12, further comprising receiving data from said selected base station at the mobile station according to said activity information.

18. The method of claim 12, wherein the activity information is associated with the selected MAC_ID according to a position of the activity information in a frame structure transmitted on the selected control channel by the selected base station.

19. The method of claim 18, wherein the activity information associated with the selected MAC_ID comprises a one-bit wide field of the frame structure.

20. The method of claim 12, wherein the plurality of MAC-IDs stored in the memory comprise the selected MAC_ID assigned by the selected base station and another MAC-ID assigned by a non-selected one of the plurality of base stations, wherein monitoring the selected control channel of the selected base station indicates handoff from the non-selected one to the selected base station.

21. The method of claim 14, wherein transmitting continues until one of:

all data packets from the mobile station are sent;

a maximum number of bytes to transmit is surpassed; and

a predetermined time-out period is exceeded.