WIRELESS DEVICE, A NETWORK NODE AND METHODS THEREIN FOR ENABLING AND PERFORMING A UPLINK CONTROL CHANNEL TRANSMISSION

• US 20170134117A1
• Filed: 04/05/2016
• Published: 05/11/2017
• Est. Priority Date: 04/10/2015
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Tan Bergstrm, Mattias, Yang, Yu, Belleschi, Marco
• Granted Patent: US 10,284,329 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method performed by a wireless device for performing an uplink control channel transmission in a serving cell in a wireless communications network is provided. The wireless device is configured with a set of serving cell(s) in the wireless communications network. First, the wireless device determines a number of serving cells of the set of serving cell(s) that are relevant to consider when performing the uplink control channel transmission in the serving cell. Secondly, the wireless device selects an uplink control channel format from a set of uplink control channel formats for uplink control channel transmissions based on the determined number of serving cells. Then, the wireless device performs the uplink control channel transmission in the serving cell using the selected uplink control channel format. A wireless device for performing an uplink control channel transmission in a serving cell in a wireless communications network is also provided.

Claims

1. A method performed by a wireless device for performing an uplink control channel transmission in a serving cell in a wireless communications network when the wireless device is configured with a set of serving cell(s) in the wireless communications network, the method comprising

determining (502) a number of serving cells of the set of serving cell(s) that are relevant to consider when performing the uplink control channel transmission in the serving cell;

selecting an uplink control channel format from a set of uplink control channel formats for uplink control channel transmissions based on the determined number of serving cells; and

performing the uplink control channel transmission in the serving cell using the selected uplink control channel format.

2. The method according to claim 1, wherein the number of serving cells that are relevant to consider when performing the uplink control channel transmission is determined to be one or more of the following:

the number of serving cells in the set of serving cell(s) that are currently activated in the wireless device,

the number of serving cells in the set of serving cell(s) that have been indicated to be activated by a network node in the wireless communications network,

the number of serving cells in the set of serving cell(s) that have been added, or configured, for the wireless device by a network node in the wireless communications network,

the number of serving cells in the set of serving cell(s) that the wireless device have been scheduled on,

the number of serving cells in the set of serving cell(s) that the wireless device have been scheduled on within a determined period of time, and

the serving cell in which the uplink control channel transmission is to be performed and one or more serving cells that are mapped to the serving cell in which the uplink control channel transmission is to be performed.

3. The method according to claim 1, wherein the uplink control channel format for the uplink control channel transmission is selected from the set of uplink control channel formats based on one or more threshold values for the determined number of serving cells.

4. The method according to claim 3, wherein the uplink control channel format for the uplink control channel transmission is selected from the set of uplink control channel formats further based on the existence of and/or the length of a periodic Channel State Information, CSI, in the wireless device.

5. The method according to claim 1, wherein the uplink control channel transmission in the serving cell using the selected uplink control channel format is performed according to one or more of the following:

at the beginning of the next subsequent subframe in the wireless communications network,

at the beginning of the next subsequent radio frame in the wireless communications network,

according to information received from a network node in the wireless communications network,

upon or after the expiry of a timer for switching the uplink control channel format for uplink control channel transmissions, and

at a fixed or predetermined time instant.

6. The method according to claim 1, wherein the uplink control channel transmission in the serving cell using the selected uplink control channel format is performed based on the configuration of the serving cell.

7. The method according to claim 1, further comprising

receiving information indicating the set of uplink control channel formats for uplink control channel transmissions from a network node in the wireless communications network.

8. The method according to claim 7, wherein the information is received in a Radio Resource Control, RRC, message.

9. A wireless device for performing an uplink control channel transmission in a serving cell in a wireless communications network when the wireless device is configured with a set of serving cell(s) in the wireless communications network, wherein

the wireless device is configured to determine a number of serving cells of the set of serving cell(s) that are relevant to consider when performing the uplink control channel transmission in the serving cell, select an uplink control channel format from a set of uplink control channel formats for uplink control channel transmissions based on the determined number of serving cells, and perform the uplink control channel transmission in the serving cell using the selected uplink control channel format.

10. The wireless device according to claim 9, further configured to determine the number of serving cells that are relevant to consider when performing the uplink control channel transmission to be one or more of the following:

the number of serving cells in the set of serving cell(s) that are currently activated in the wireless device,

the number of serving cells in the set of serving cell(s) that have been indicated to be activated by a network node in the wireless communications network,

the number of serving cells in the set of serving cell(s) that have been added, or configured, for the wireless device by a network node in the wireless communications network,

the number of serving cells in the set of serving cell(s) that the wireless device have been scheduled on,

the number of serving cells in the set of serving cell(s) that the wireless device have been scheduled on within a determined period of time, and

the serving cell in which the uplink control channel transmission is to be performed and one or more serving cells that are mapped to the serving cell in which the uplink control channel transmission is to be performed.

11. The wireless device according to claim 9, further configured to determine select the uplink control channel format for the uplink control channel transmission from the set of uplink control channel formats based on one or more threshold values for the determined number of serving cells.

12. The wireless device according to claim 11, further configured to select the uplink control channel format for the uplink control channel transmission from the set of uplink control channel formats further based on the existence of and/or the length of a periodic Channel State Information, CSI, in the wireless device.

13. The wireless device according to claim 9, further configured to perform the uplink control channel transmission in the serving cell using the selected uplink control channel format according to one or more of the following:

at the beginning of the next subsequent subframe in the wireless communications network,

at the beginning of the next subsequent radio frame in the wireless communications network,

according to information received from a network node in the wireless communications network,

upon or after the expiry of a timer for switching the uplink control channel format for uplink control channel transmissions, and

at a fixed or predetermined time instant.

14. The wireless device according to claim 9, further configured to perform the uplink control channel transmission in the serving cell using the selected uplink control channel format based on the configuration of the serving cell.

15. The wireless device according to claim 9, further configured to receive information indicating the set of uplink control channel formats for uplink control channel transmissions from a network node in the wireless communications network.

16. The wireless device according to claim 15, wherein the information is received in a Radio Resource Control, RRC, message.

17. The wireless device according to claim 9, further comprising a processor and a memory, wherein the memory is containing instructions executable by the processor.

18. A method performed by a network node for enabling an uplink control channel transmission by a wireless device in a serving cell in a wireless communications network when the wireless device is configured with a set of serving cell(s) in the wireless communications network, the method comprising

determining a set of uplink control channel formats for uplink control channel transmissions for the wireless device,

transmitting information indicating the determined set of uplink control channel formats for uplink control channel transmissions for the wireless device to the wireless device.

19. The method according to claim 18, wherein the determining further comprises determining one or more criterions to be used by the wireless device in determining a number of serving cells that are relevant to consider when performing uplink control channel transmissions in the serving cell, and the transmitting further comprising transmitting information indicating the one or more criterions to the wireless device.

20. The method according to claim 18, wherein the determining further comprises determining one or more threshold values to be used by the wireless device when selecting an uplink control channel format from the set of uplink control channel formats, and the transmitting further comprising transmitting information indicating the one or more threshold values to the wireless device.

21. The method according to claim 18, wherein the information is transmitted in one or more Radio Resource Control, RRC, messages.

22. A network node for enabling an uplink control channel transmission by a wireless device in a serving cell in a wireless communications network when the wireless device is configured with a set of serving cell(s) in the wireless communications network, wherein

the network node is configured to determine a set of uplink control channel formats for uplink control channel transmissions for the wireless device, and to transmit information indicating the determined set of uplink control channel formats for uplink control channel transmissions for the wireless device to the wireless device.

23. The network node according to claim 22, further configured to determine one or more criterions to be used by the wireless device in determining a number of serving cells that are relevant to consider when performing uplink control channel transmissions in the serving cell, and transmit information indicating the one or more criterions to the wireless device.

24. The network node according to claim 22, further configured to determine one or more threshold values to be used by the wireless device when selecting an uplink control channel format from the set of uplink control channel formats, and transmit information indicating the one or more threshold values to the wireless device.

25. The network node according to claim 22, wherein the information is transmitted in one or more Radio Resource Control, RRC, messages.

26. The network node according to claim 22, further comprising a processor and a memory, wherein the memory is containing instructions executable by the processor.

27. (canceled)

28. (canceled)