REVERSE LINK SIGNALING TECHNIQUES FOR WIRELESS COMMUNICATION SYSTEMS

• US 20100309862A1
• Filed: 05/10/2010
• Published: 12/09/2010
• Est. Priority Date: 05/08/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Bhalla, Rajesh, Fang, Yonggang, Lu, Ting, Zhao, Xiaowu
• Granted Patent: US 9,713,067 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• 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, wherein the capability, when enabled, causes the wireless device to adaptively transmit, based on a detected change in a wireless channel condition, overhead channel information to control data packet transmissions to the wireless device;

communicating with the wireless device to enable the capability;

receiving, from the wireless device, an adaptive transmission of overhead channel information; and

transmitting one or more data packets to the wireless device based on the received overhead control information.

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

using the capability for Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), and Spatial Rank Indication (SRI) channels.

3. The method of claim 2, wherein the capability includes independent transmissions over the DRC, DSC, SSI, and SRI channels 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 reserve link to the base station; and

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.

5. The method of claim 4, 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 transmitting the one or more data packets comprises using the received overhead channel information to schedule data transmission on a forward link when the capability is enabled.

7. The method of claim 1, further comprising:

communicating with the wireless device to disable the capability.

8. The method of claim 1, wherein the capability is controlled by an access network, the method further comprising:

transmitting an instruction to the wireless device to suppress future transmission of additional overhead channel information.

9. The method of claim 8, wherein transmitting the instruction comprises transmitting the instruction via a fast indication in a physical layer.

10. The method of claim 8, further comprising:

using the capability for Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), and Spatial Rank Indication (SRI) channels.

11. The method of claim 9, 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 reserve link.

12. The method of claim 9, 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.

13. The method of claim 9, wherein transmitting the instruction 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.

14. A method for wireless communications, comprising:

operating a base station to transmit an indication that the base station supports receiving selective transmissions of data control information over a reverse link;

communicating with a wireless device that is capable of selectively transmitting data control information to control data packet transmissions to the wireless device;

receiving selectively transmitted information, comprising a first data control information, from the wireless device; and

using the first data control information for communications with the wireless device until the base station receives second data control information from the wireless device.

15. The method of claim 14, wherein the data control information comprises Data Rate Control (DRC) information for controlling a data rate of a data packet transmission.

16. The method of claim 14, wherein the data control information comprises Data Source Control (DSC) information for indicating a wireless sector that is preferred by the wireless device for receiving a data packet transmission.

17. The method of claim 14, wherein the data control information comprises Spatial Signature Indication (SSI) information that indicates a pre-coding matrix index.

18. The method of claim 14, wherein the data control information comprises Spatial Rank Indication (SRI) information that indicates a channel dimensionality.

19. The method of claim 14, wherein communicating with the wireless device comprises causing the wireless device to selectively transmit data control information when a change in a wireless channel condition is detected.

20. The method of claim 19, wherein the wireless channel condition is measured by an error rate associated with one or more packet data transmissions to the wireless device.

21. A method for wireless communications, comprising:

establishing wireless communication with a wireless device;

determining to transmit data to the wireless device at a fixed transmission rate;

sending, based on an output of the determining, a fixed transmission request message to control the wireless device to suppress transmission of overhead channel information that controls data packet transmissions to the wireless device, wherein the fixed transmission request message indicates the fixed transmission rate; and

using the fixed transmission rate to transmit data to the wireless device.

22. The method of claim 21, further comprising:

sending an additional message to control the wireless device to start transmission of overhead channel information;

receiving overhead channel information from the wireless device; and

using the overhead channel information to transmit data to the wireless device.

23. A method for wireless communications, comprising:

transmitting, at a base station, an indication that the base station supports a fixed transmission rate on a reverse link;

monitoring for a message from a wireless device, the message indicative of a request to use a fixed transmission rate for transmitting data over the reverse link to the base station;

controlling the wireless device to use the fixed transmission rate; and

using the fixed transmission rate for receiving data from the wireless device.

24. The method of claim 23, wherein controlling the wireless device to use the fixed transmission rate comprises causing the wireless device to suppress transmitting a data rate over a reverse rate indicator (RRI) channel.

25. A system for wireless communications, comprising:

multiple base stations configured to (1) communicate information to a wireless device about a capability for adaptive reverse link overhead channel transmission, the capability, when enabled, causing the wireless device to adaptively transmit, based on a detected change in a wireless channel condition, overhead channel information to control data packet transmissions to the wireless device, (2) communicate with the wireless device to enable the capability, (3) receive, from the wireless device, an adaptive transmission of overhead channel information, and (4) transmit one or more data packets to the wireless device based on the received overhead control information.

26. The system of claim 25, wherein the base stations are configured to use the capability for Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), and Spatial Rank Indication (SRI) channels.

27. The system of claim 26, wherein the capability includes independent transmissions over the DRC, DSC, SSI, and SRI channels as autonomously controlled by the wireless device.

28. The system of claim 27, wherein the wireless device is configured to (1) transmit first overhead channel information over a reserve 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.

29. The system of claim 28, wherein the wireless device is configured to disable monitoring a DRC lock value when the DRC channel is not transmitted.

30. The system of claim 25, wherein the base stations are configured to use the received overhead channel information to schedule data transmission on a forward link when the capability is enabled.

31. The system of claim 25, wherein the base stations are configured to communicate with the wireless device to disable the capability.

32. The system of claim 25, wherein the base stations are configured to transmit an instruction to the wireless device to suppress future transmission of additional overhead channel information.

33. The system of claim 32, wherein the instruction is transmitted via a fast indication in a physical layer.

34. The system of claim 32, further comprising:

using the capability for one or more of;

Data Rate Control (DRC), Data Source Control (DSC), Spatial Signature Indication (SSI), and Spatial Rank Indication (SRI) channels.

35. The system of claim 34, 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 reserve link.

36. The system of claim 35, 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.

37. The system of claim 34, 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.