LINK ADAPTATION ON DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATIONS SYSTEM

• US 20180234204A1
• Filed: 02/14/2017
• Published: 08/16/2018
• Est. Priority Date: 02/14/2017
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Nammi, SaiRamesh, Wang, Xiaoyi, Ghosh, Arunabha, Bendlin, Ralf
• Granted Patent: US 10,355,813 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/001 applied to control information
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Link adaptation on downlink control channels is provided herein. A method can comprise sending, by a network device of a wireless network and comprising a processor, first data indicating a first downlink control channel to a mobile device. The first data indicating the downlink control channel can comprise a first coreset indication that comprises a first parameter used to decode the first downlink control channel at the mobile device. The method can also include determining, by the network device, a second coreset indication for the mobile device. The second coreset indication can comprise a second parameter that can be adaptively determined based on a condition of an environment determined to be associated with the mobile device.

Claims

1. A method, comprising:

sending, by a network device of a wireless network and comprising a processor, first data indicating a first downlink control channel to a mobile device, wherein the first data indicating the first downlink control channel comprises a first coreset indication that comprises a first parameter used to decode the first downlink control channel at the mobile device; and

determining, by the network device, a second coreset indication for the mobile device, wherein the second coreset indication comprises a second parameter that is adaptively determined based on a condition of an environment determined to be associated with the mobile device.

2. The method of claim 1, wherein the first downlink control channel is a group common control channel.

3. The method of claim 2, wherein the first coreset indication is determined a priori by the network device.

4. The method of claim 1, further comprising determining, by the network device, the condition of the environment based on a determined location of the mobile device within the wireless network.

5. The method of claim 4, further comprising, determining, by the network device, the second parameter based on the determined location of the mobile device being proximate to a cell edge of the wireless network.

6. The method of claim 4, further comprising, determining, by the network device, the second parameter based on the determined location of the mobile device being within a defined area of the wireless network.

7. The method of claim 1, further comprising, determining, by the network device, the condition of the environment based on an indication, received from the mobile device, of a quality of a communication channel used for the first downlink control channel.

8. The method of claim 1, further comprising, determining, by the network device, the condition of the environment based on uplink channel information measured by the network device during a receipt of the first downlink control channel at the mobile device.

9. The method of claim 1, wherein the first downlink control channel comprises a downlink control channel configured to operate according to a fifth generation wireless communication network protocol.

10. A system, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

sending, to a mobile device, first data indicating a first downlink control channel that comprises a first indication of a first coreset, wherein the first coreset comprises a first parameter determined a priori and usable to decode the first downlink control channel at the mobile device;

determining a second coreset for the mobile device, wherein the second coreset comprises a second parameter that is determined based on a condition of an environment of the mobile device; and

sending, to the mobile device, second data indicating a second downlink control channel that comprises a second indication of the second coreset, wherein the second coreset comprises the second parameter usable to decode the second downlink control channel at the mobile device.

11. The system of claim 10, wherein the sending the first data indicating the first downlink control channel comprises sending a group common control channel that comprises the first indication of the first coreset.

12. The system of claim 10, wherein the first parameter comprises a first modulation format of the first downlink control channel, and wherein the second parameter comprises a second modulation format for the second downlink control channel.

13. The system of claim 10, wherein the first parameter comprises a first code rate for the first downlink control channel, and wherein the second parameter comprises a second code rate for the second downlink control channel.

14. The system of claim 10, wherein the first parameter comprises a first frozen bit location for a first polar code of the first downlink control channel, and wherein the second parameter comprises a second frozen bit location for a second polar code of the second downlink control channel.

15. The system of claim 10, wherein the first parameter comprises a first reference signal density, and wherein the second parameter comprises a second reference signal density.

16. The system of claim 10, wherein the operations further comprise:

determining the condition of the environment based on a location of the mobile device within a wireless network during a receipt of the first downlink control channel.

17. The system of claim 10, wherein the operations further comprise:

determining the condition of the environment based on an indication, received from the mobile device, of a quality of a communication channel during a receipt of the first downlink control channel.

18. A machine-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:

sending first data indicating a first downlink control channel to a mobile device via a network device of network devices of a wireless network, wherein the first downlink control channel comprises a group common control channel, and wherein the first data indicating the first downlink control channel comprises a first coreset indication that comprises a first parameter for decoding the first downlink control channel at the mobile device; and

determining a second coreset indication for the mobile device, wherein the second coreset indication comprises a second parameter that is adaptively determined based on a condition of an environment determined to be associated with the mobile device.

19. The machine-readable storage medium of claim 18, wherein the first coreset indication is determined a priori by the network device irrespective of the condition of the environment determined to be associated with the mobile device.

20. The machine-readable storage medium of claim 18, wherein the operations further comprise determining the condition of the environment determined to be associated with the mobile device based on uplink channel information measured by the network device.