Process for controlling uplink packet transmission in a wireless communication system

• US 6,661,777 B1
• Filed: 03/29/1999
• Issued: 12/09/2003
• Est. Priority Date: 03/01/1999
• Status: Expired due to Fees

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Blanc, Patrick, de Montgolfier, Rémi
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US09/280,675
• Time in Patent Office: 1,716 Days
• Field of Search: 370/336, 370/252, 370/331, 370/231, 370/401, 370/536, 709/232
• US Class Current: 370/252
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

The invention relates to a process for controlling uplink transmission in a wireless communication network. It comprises broadcasting to the user equipments a maximum transmission rate, so as to limit the risks of collisions and the risk that the network collapses. In the case of a CDMA network, the maximum transmission rate may be broadcast as a maximum user bit rate, in the form of a minimum spreading factor. This information may be broadcast at each frame, so that it is taken into account by a user equipment for uplink transmission in the next frame. The invention also proposes processes for controlling access of the user equipment to the resources. These processes limit the number of users that may access the resources at a given time, or limit the throughput of the user equipment at the time the user equipment accesses the resource.

Claims

1. A process for sharing radio resources between user equipments on an uplink of a packet service wireless communication system, comprising:

in the network, computing a maximum transmission rate (SF_min) for user equipments, and broadcasting this maximum transmission rate to user equipments;

in a user equipment, transmitting with a transmission rate lower than the last received broadcast maximum transmission rate.

2. The process of claim 1, wherein the maximum transmission rate is broadcast every frame.

3. The process of claim 1, wherein the maximum transmission rate is identical for all user equipments.

4. The process of claim 1, wherein the maximum transmission rate is class dependent.

5. The process of claim 1, further comprising:

in the network, computing a probability (p_tr) for user equipments, and broadcasting this probability to user equipments;

in a user equipment, transmitting only if a random value (p) is lower than the last received broadcast probability (p_tr).

6. The process of claim 1, further comprising:

in the network, computer a probability (p_tr) for user equipments, and broadcasting this probability to user equipments;

in a user equipment, if a requested transmission rate is lower than the broadcast transmission rate, computing a user probability (p_own) higher than a last received broadcast probability (p_tr), as a function of the last received broadcast probability (p_tr), the last received broadcast maximum transmission rate (SF_min), and the transmission rate required by the user equipment, and transmitting only if a random value (p) is lower than the last computed user probability (p_own).

7. The process of claim 5, wherein the probability is broadcast every frame.

8. The process of claim 5, wherein the probability is identical for all user equipments.

9. The process of claim 5, wherein the probability is class dependent.

10. The process of claim 5 wherein the step of transmitting is carried out for a validity time period (T_validity) after it is determined that the random value (p) is lower than the last received broadcast probability (p_tr).

11. The process of claim 5, wherein a user equipment is not allowed to transmit for a retry time period (T_retry) after it is determined that the random value (p) is not lower than the last received broadcast probability (p_tr).

12. The process of claim 1 wherein the step of transmitting is started at a first transmission rate (SF_init) for a time period (T_init), and is continued at a second transmission rate (SF) after the lapse of said time period (T_init).

13. The process of claim 12, wherein the maximum transmission rate is broadcast to user equipments transmitting at said first transmission rate.

14. The process of claim 12, wherein the maximum transmission rate is broadcast only when it is computed anew.

15. A wireless communication system carrying out a process for sharing radio resources user equipments on an uplink of a packet service wireless communication system, said process comprising:

in the network, computing a maximum transmission rate (SF_min) for user equipments, and broadcasting this maximum transmission rate to user equipments;

in a user equipment, transmitting with a transmission rate lower than the last received broadcast maximum transmission rate.

16. A user equipment comprising means for transmitting with a transmission rate lower than a last received broadcast maximum transmission rate, wherein the last received broadcast maximum transmission rate was received from and computed by a network.

17. A network equipment comprising:

means for computing a maximum transmission rate for at least one user equipment, and

means for broadcasting the maximum transmission rate to said at least one user equipment.

18. The network equipment according to claim 17, wherein the maximum transmission rate is broadcast every frame.

19. The network equipment according to claim 17, wherein the maximum transmission rate is identical for all user equipment.

20. The network equipment according to claim 17, wherein the maximum transmission rate is class dependent.