Method and apparatus for determining a data rate in a high rate packet data wireless communications system

• US 20050254465A1
• Filed: 06/24/2005
• Published: 11/17/2005
• Est. Priority Date: 10/25/2000
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wei, Yongbin, Lundby, Stein A., Razoumov, Leonid, Bao, Gang
• Granted Patent: US 9,107,109 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels

Abstract

In a wireless communication system a method for combination transmission of packet data and low delay data. In one embodiment a parallel signaling channel provides a message to receivers indicating a target recipient of packet data. The message also identifies the transmission channels used for packet data transmissions. Each receiver may then selectively decode only packets where the message identifies the receiver as a target recipient. The data packets stored in a buffer are ignored if the target recipient is another mobile unit. In one embodiment, the message is sent concurrently with the data packet on a parallel channel. In one embodiment, the message is punctured into the high rate packet data transmission.

Claims

1. A wireless communication apparatus, comprising:

a first processor operative to receive a first indicator, the first indicator corresponding to available packet data transmission power; and

a correlation unit operative to determine a packet data transmission rate indicator as a function of the first indicator and a received pilot signal strength.

2. The wireless communication apparatus of claim 1, wherein the first indicator corresponds to a ratio of available packet data transmission power-to-pilot signal strength.

3. The wireless communication apparatus of claim 2, wherein the pilot signal strength is a measure of the signal-to-noise ratio of the pilot signal.

4. The wireless communication apparatus of claim 3, further comprising:

an adjustment node coupled to the first processor and the correlation unit, the adjustment node operative to adjust the signal-to-noise ratio of the pilot signal in response to the ratio to determine a signal-to-noise ratio for packet data transmissions.

5. The wireless communication apparatus of claim 4, wherein the packet data transmission rate indicator is the signal-to-noise ratio for packet data transmissions.

6. The wireless communication apparatus of claim 1, wherein the apparatus is operative to transmit the packet data transmission rate indicator via a data request channel.

7. The wireless communication apparatus of claim 6, wherein the packet data transmission rate indicator is a data rate.

8. The wireless communication apparatus of claim 1, wherein the apparatus is operative within a wireless communication system supporting packet data transmissions and low delay data transmissions.

9. In a wireless communication system, the system operative for transmitting packet data and low delay data, the system having a total available transmit power, a method comprising:

establishing at least one low delay communication link using a first power;

determining available packet data traffic power as a function of the total available transmit power and the first power;

determining a packet data rate based on the available packet data traffic power.

10. The method of claim 9, wherein the at least one low delay communication is a voice communication.

11. The method of claim 9, wherein the first power is a signal-to-noise ratio of a pilot signal, and

wherein the step of determining the available packet data traffic power, further comprises:

determining a traffic-to-pilot ratio of the total available transmit power to the first power.

12. The method of claim 11, wherein the step of determining a packet data rate further comprises:

estimating a signal-to-noise ratio of the packet data traffic by adjusting the signal-to-noise ratio of the pilot according to the traffic-to-pilot ratio.

13. A wireless communication apparatus, comprising:

a first processor operative to receive a first indicator, the first indicator corresponding to a ratio of available traffic-to-pilot signal strength;

a measurement unit operative to receive a pilot signal and determine a pilot signal-to-noise ratio of a pilot signal;

a summation node coupled to the measurement unit and the first processor, the summation node operative to adjust the signal-to-noise ratio by the first indicator to form a traffic signal-to-noise ratio; and

a correlation unit operative to receive the traffic signal-to-noise ratio and determine an associated data rate for transmission.