Reverse link signaling techniques for wireless communication systems

• US 9,713,067 B2
• Filed: 05/10/2010
• Issued: 07/18/2017
• Est. Priority Date: 05/08/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Bhalla, Rajesh, Fang, Yonggang, Zhao, Xiaowu, Lu, Ting
• Primary Examiner(s): Shah, Chirag
• Assistant Examiner(s): Smith, Joshua
• Application Number:
  US12/777,210
• Publication Number:
  US 20100309862A1
• Time in Patent Office: 2,626 Days
• Field of Search: None
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00

Abstract

Techniques, apparatuses, and systems are described for wireless communications. In one implement, wireless communication systems can provide one or more mechanisms to reduce reverse overhead control signaling by adaptively transmitting overhead control information.

Claims

1. A method for wireless communications, comprising:

communicating, to a wireless device from a network, information indicative of the network'"'"'s support of a capability for adaptive reverse link overhead channel transmission;

making a decision, based on the capability, whether to enable or disable an adaptive reverse link overhead channel transmission, wherein the adaptive reverse link overhead channel transmission, when enabled, causes the wireless device to adaptively transmit overhead channel information that reduces reverse link transmit power consumption by transmitting the overhead channel information based on a detected change in a wireless channel condition, and, when disabled, causes the wireless device to transmit overhead channel information in a legacy manner that requires a larger portion of reverse link transmit power by constantly transmitting the overhead channel information;

communicating to the wireless device the decision to enable or disable the adaptive reverse overhead channel transmission;

receiving, from the wireless device, the adaptively transmitted overhead channel information based on the detected change in the wireless channel condition when the adaptive reverse link overhead channel transmission is enabled;

determining, using the received overhead channel information, transmission of data packets on a forward link to the wireless device based on the detected change in the wireless channel condition;

scheduling, upon deciding the transmission of data packets, transmission of one or more data packets on a forward link to the wireless device forward when the capability is enabled; and

communicating, using availability of buffered data in the network for data transmission on the forward link, an indication to the wireless device to suppress transmission of overhead channel information in reverse link overhead channel transmissions.

2. The method of claim 1, the method further comprising:

using the capability for enabling or disabling the wireless device to adaptively transmit to the network the overhead channel information over a Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), or Spatial Rank Indication (SRI) channel.

3. The method of claim 2, wherein the capability includes independent transmission over the DRC, DSC, SSI, or SRI channel as autonomously controlled by the wireless device.

4. The method of claim 3, further comprising:

operating the wireless device to transmit first overhead channel information over a reverse link to a base station in the network;

operating, when the capability is enabled, the wireless device to suppress a transmission of second overhead channel information if the second overhead channel information is identical to the first overhead channel information, and

operating, when the capability is disabled, the wireless device to continue a transmission of second overhead channel information.

5. The method of claim 3 further comprising:

operating the wireless device to disable monitoring a DRC lock value when the DRC channel is not transmitted.

6. The method of claim 1, wherein communicating the indication to suppress transmission comprises transmitting the indication via a fast indication in a physical layer.

7. The method of claim 6, wherein communicating with the wireless device to enable the capability comprises transmitting a DRC lock indicator, the method further comprising:

operating the wireless device, based on the DRC lock indicator, to transmit the overhead channel information over a reverse link.

8. The method of claim 6, further comprising:

causing the wireless device to suppress future transmission of additional overhead channel information when received DRC lock indicators for two or more active sectors indicate that a suppression is required.

9. The method of claim 6, wherein transmitting the indication comprises transmitting, based on a lack of buffered data for the wireless device, a DRC lock value to control the wireless device to suppress future transmission of additional overhead channel information.

10. The method of claim 1, wherein the wireless channel condition is measured by an error rate associated with one or more packet data transmissions to the wireless device.

11. A system for wireless communications, comprising:

a wireless device;

multiple base stations configured to

(1) communicate, to the wireless device, information about a capability for adaptive reverse link overhead channel transmission and an indication when reverse link overhead channel transmission is not required,

(2) make a decision, based on the capability, whether to enable or disable an adaptive reverse link overhead channel transmission, wherein the adaptive reverse link overhead channel transmission, when enabled, causes the wireless device to adaptively transmit overhead channel information that reduces reverse link transmit power consumption by transmitting the overhead channel information based on a detected change in a wireless channel condition, and, when disabled, causes the wireless device to transmit overhead channel information in a legacy manner that requires a larger portion of reverse link transmit power by constantly transmitting the overhead channel information,

(3) communicate to the wireless device the decision to enable or disable the adaptive reverse overhead channel transmission,

(4) receive, from the wireless device, the adaptively transmitted overhead channel information based on the detected change in the wireless channel condition when the adaptive reverse link overhead channel transmission is enabled,

(5) determine, using the received overhead channel information, transmission of data packets on a forward link to the wireless device based on the detected change in the wireless channel condition,

(6) schedule, upon deciding the transmission of data packets, transmission of one or more data packets on a forward link to the wireless device when the capability is enabled, and

(7) communicating, using availability of buffered data in the network for data transmission on the forward link, an indication to the wireless device to suppress transmission of overhead channel information in reverse link overhead channel transmissions.

12. The system of claim 11, wherein the base stations are configured to use the capability for communicating with the wireless device to receive overhead channel information from the wireless device in a Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), or Spatial Rank Indication (SRI).

13. The system of claim 12, wherein the capability includes independent transmission over the DRC, DSC, SSI, or SRI channel as autonomously controlled by the wireless device.

14. The system of claim 13, wherein the wireless device is configured to (1) transmit first overhead channel information over a reverse link to the base station, and (2) when the capability is enabled, suppress a transmission of second overhead channel information if the second overhead channel information is identical to the first overhead channel information, and (3) when the capability is disabled, continue a transmission of the second overhead channel information.

15. The system of claim 13, wherein the wireless device is configured to disable monitoring a DRC lock value when the DRC channel is not transmitted.

16. The system of claim 11, wherein the indication to suppress transmission is communicated via a fast indication in a physical layer.

17. The system of claim 16, wherein the base stations are configured to transmit a DRC lock indicator, and wherein the wireless device is configured to receive the DRC lock indicator and, based on a value of the DRC lock indicator, transmit the overhead channel information over a reverse link.

18. The system of claim 17, wherein the wireless device is configured to suppress future transmission of additional overhead channel information when received DRC lock indicators for two or more active sectors indicate that a suppression is required.

19. The system of claim 16, wherein the base stations are configured to transmit, based on a lack of buffered data for the wireless device, a DRC lock value to control the wireless device to suppress future transmission of additional overhead channel information.