Link adaptation on downlink control channel in a wireless communications system

• US 10,355,813 B2
• Filed: 02/14/2017
• Issued: 07/16/2019
• 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
• Primary Examiner(s): Sam, Phirin
• Application Number:
  US15/432,515
• Publication Number:
  US 20180234204A1
• Time in Patent Office: 882 Days
• Field of Search: None
• 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 control resource set indication that comprises a first parameter comprising a first modulation format to be used by the mobile device to decode the first downlink control channel at the mobile device and comprising a first frozen bit location for a first polar code of the first downlink control channel; and

determining, by the network device, a second control resource set indication for the mobile device, wherein the second control resource set indication comprises a second parameter comprising a second modulation format that is adaptively determined, by the network device, based on a condition of an environment determined to be associated with the mobile device and comprising a second frozen bit location for a second polar code of the second downlink control channel.

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 control resource set 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 control resource set, wherein the first control resource set comprises a first parameter comprising a first modulation format that is determined a priori and usable to decode the first downlink control channel at the mobile device;

determining a second control resource set for the mobile device, wherein the second control resource set comprises a second parameter comprising a second modulation format 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 control resource set, wherein the second control resource set comprises the second parameter usable to decode the second downlink control channel at the mobile device,

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.

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 control resource set.

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 reference signal density, and wherein the second parameter comprises a second reference signal density.

15. 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.

16. 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.

17. 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 control resource set indication that comprises a first parameter comprising a first modulation format for a decoding of the first downlink control channel at the mobile device; and

determining a second control resource set indication for the mobile device, wherein the second control resource set indication comprises a second parameter comprising a second modulation format that is adaptively determined based on a condition of an environment determined to be associated with the mobile device, 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.

18. The machine-readable storage medium of claim 17, wherein the first control resource set indication is determined a priori by the network device irrespective of the condition of the environment determined to be associated with the mobile device.

19. The machine-readable storage medium of claim 17, 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.