Downlink traffic channel resource allocation method and data transmission method for multi-carrier HSDPA

• US 8,180,360 B2
• Filed: 06/29/2006
• Issued: 05/15/2012
• Est. Priority Date: 07/05/2005
• Status: Active Grant

• Current Assignee: Shanghai Ultimate Power Communications Technology Co., Ltd.
• Original Assignee: Shanghai Ultimate Power Communications Technology Co., Ltd.
• Inventors: Yang, Guiliang, Sun, Shaohui, Wang, Yingmin
• Primary Examiner(s): Brandt, Christopher M
• Application Number:
  US11/994,770
• Publication Number:
  US 20080299985A1
• Time in Patent Office: 2,147 Days
• Field of Search: 455/450, 455/451, 455/452.1, 455/452.2, 455/453, 455/454, 455/455, 370/329, 370/330, 370/341
• US Class Current: 455/452.2
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

The present invention discloses a method of allocating downlink traffic channel resources for multi-carrier HSDPA, and the method includes: first of all, selecting a carrier with the optimum channel condition; determining whether the carrier meets the resource allocation demand of a downlink traffic channel, if yes, allocating resources that meet the downlink traffic channel on the carrier; otherwise, allocating the available resources of the carrier to the downlink traffic channel, and selecting a carrier with the optimum channel condition from the remaining carriers for resource allocation according to the remaining resource allocation demand of the downlink traffic channel. The present invention provides, according to the transmission characteristic of the existing HSDPA multi-carrier, a method for allocating downlink traffic channel resources, which method is applicable for packet data transmission of the multi-carrier HSDPA.

Claims

1. A method of allocating downlink traffic channel resources for multi-carrier High Speed Data Packet Access (HSDPA), comprising:

1) selecting a carrier with optimum channel conditions;

2) determining whether the carrier meets resource demand of a downlink traffic channel, if yes, turning to step

     3);

otherwise, turning to step

     4);

3) allocating resources that meet the resource demand of the downlink traffic channel on the carrier, and finishing processing of the method;

4) allocating all the available resources of the carrier to the downlink traffic channel, and then selecting, according to remaining resource demand of the downlink traffic channel, another carrier with optimum channel conditions among the remaining carriers and allocating remaining resources on another carrier, until the resource demand of the downlink traffic channel is met.

2. The method of allocating downlink traffic channel resources for multi-carrier HSDPA according to claim 1, wherein the channel conditions comprise interference degree of the carrier.

3. The method of allocating downlink traffic channel resources for multi-carrier HSDPA according to claim 2, wherein, the channel conditions further comprise base station capability, service status and traffic load status.

4. The method of allocating downlink traffic channel resources for multi-carrier HSDPA according to claim 2, further comprising the following step before the step 1):

sequencing the available downlink traffic channel resources of the carriers according to the channel conditions.

5. The method of allocating downlink traffic channel resources for multi-carrier HSDPA according to claim 4, further comprising the following step before the step 1):

obtaining, from a terminal, measurement information carrying information of the interference degree.

6. A method of transmitting packet data for multi-carrier High Speed Data Packet Access (HSDPA), comprising:

1) establishing a downlink traffic channel and corresponding uplink control and downlink control channels;

2) selecting a carrier with optimum channel conditions;

3) determining whether the carrier meets resource demand of the downlink traffic channel, if yes, turning to step

     4);

otherwise, turning to step

     5);

4) allocating resources that meet the resource demand of the downlink traffic channel on the carrier, and turning to step

     6);

5) allocating all the available resources of the carrier to the downlink traffic channel, and then selecting, according to remaining resource demand of the downlink traffic channel, another carrier with optimum channel conditions from the remaining carriers and allocating remaining resources on another carrier, until the resource demand of the downlink traffic channel is met;

6) sending, via the downlink control channel, control information necessary for a user terminal to receive the packet data, so that the user terminal may receive the control information; and

7) receiving a response message for data sending feedback by the uplink control channel, and sending the packet data according to the resources allocated to the downlink traffic channel.

7. The method of transmitting packet data for multi-carrier HSDPA according to claim 6, wherein the channel conditions comprise interference degree of the carrier.

8. The method of transmitting packet data for multi-carrier HSDPA according to claim 7, wherein the channel conditions further comprise base station capability, service status and traffic load status.

9. A radio network controller for allocating downlink traffic channel resources for multi-carrier High Speed Data Packet Access (HSDPA), wherein the radio network controller comprises a downlink traffic channel allocation device that comprises a resource storage unit, a selection unit and a resource allocation unit, wherein:

the resource storage unit is adapted to store information of available downlink traffic channel resources of respective carriers;

the selection unit is coupled with the resource storage unit and the resource allocation unit, for obtaining, from the resource storage unit, the available downlink traffic channel resources of a carrier that is not allocated and corresponding channel condition information, and selecting the available downlink traffic channel resources of the carrier with the optimum channel conditions; and

the resource allocation unit is adapted to obtain, from the selection unit, the available downlink traffic channel resources for allocation;

wherein when a carrier with optimum channel conditions, which is selected by the selection unit, already meets resource demand of a downlink traffic channel, the resource allocation unit is adapted to allocate resources firstly on the carrier with optimum channel conditions and then on another carrier with optimum channel conditions among the remaining carriers, until the resource demand of the downlink traffic channel is met.

10. The radio network controller according to claim 9, wherein, the channel condition information comprises interference degree.