Supplementary uplink with LTE coexistence adjacent to frequency division duplex spectrum for radio networks

1. A method, comprising:

configuring, by a network device comprising a processor, a first frequency band in radio time division duplex spectrum to be used for first operation in a time division duplex mode;

configuring, by the network device, a second frequency band in a radio frequency division duplex uplink spectrum to be used for second operation in the time division duplex mode as supplementary uplink carrier; and

communicating, by the network device, with a user equipment in the time division duplex mode, comprising facilitating sending downlink transmissions on the first frequency band and facilitating receiving uplink transmissions on the second frequency band, wherein the communicating further comprises configuring the user equipment to use the second frequency band to send the uplink transmissions using an implicit indication that comprises configuring only downlink resources on the first frequency band.

2. The method of claim 1 , wherein the configuring the first frequency band comprises restricting a new radio downlink bandwidth part to a non-guard region of the first frequency band.

3. The method of claim 1 , further comprising configuring, by the network device, uplink resources for the user equipment used for random access channel communications in a non-guard region of the first frequency band at an edge of a guard region.

4. The method of claim 1 , wherein the implicit indication further comprises setting a random access channel supplementary uplink radio signal received power threshold value to a maximum allowed value.

5. The method of claim 1 , wherein the configuring the user equipment to use the second frequency band to send the uplink transmissions further comprises facilitating sending an explicit indication to the user equipment to use the second frequency band to send the uplink transmissions.

6. The method of claim 1 , wherein the implicit indication further comprises not providing a random access channel configuration via the first frequency band.

7. The method of claim 1 , wherein the implicit indication further comprises setting a random access channel supplementary uplink radio signal received power threshold value to an out-of-range value.

8. A network device, comprising:

a processor; and

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

configuring a first frequency band in a radio time division duplex spectrum allocated for first time division duplex mode operation;

configuring a second frequency band in a radio frequency division duplex uplink spectrum allocated for second time division duplex mode operation as supplementary uplink; and

communicating with a user equipment comprising sending downlink transmissions via the first frequency band and receiving uplink transmissions via the second frequency band, wherein the downlink transmissions are time division duplex transmissions with respect to the uplink transmissions, wherein the communicating further comprises configuring the user equipment to use the second frequency band for transmission of the uplink transmissions using an implicit indication that comprises configuring only downlink resources on the first frequency band.

9. The network device of claim 8 , wherein the operations further comprise configuring the user equipment to operate in a time division duplex mode.

10. The network device of claim 8 , wherein the configuring the first frequency band comprises restricting a new radio downlink bandwidth part to a non-guard region of the first frequency band, and further comprising, configuring uplink resources for the user equipment to be used for random access channel communications in the non-guard region of the first frequency band at an edge of a guard region of the first frequency band.

11. The network device of claim 8 , wherein the implicit indication further comprises setting a random access channel supplementary uplink radio signal received power threshold value to a maximum allowed value.

12. The network device of claim 8 , wherein the configuring the user equipment to use the second frequency band for the transmission of the uplink transmissions further comprises providing an explicit indication to the user equipment to use the second frequency band for the transmission of uplink transmissions.

13. The network device of claim 8 , wherein the implicit indication further not providing a random access channel configuration via the first frequency band.

14. The network device of claim 8 , wherein the implicit indication further comprises setting the random access channel communications supplementary uplink radio signal received power threshold value to an out-of-range value.

15. A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor of a network device, facilitate performance of operations, the operations comprising:

configuring a bandwidth part of a first frequency band in a new radio time division duplex spectrum for time division duplex mode operation in a time division duplex mode;

configuring a supplementary uplink band in a frequency division duplex supplementary uplink spectrum for the time division duplex mode operation in the time division duplex mode; and

configuring a user equipment to, in the time division duplex mode, receive downlink communications on the bandwidth part of the first frequency band and send uplink communications on the supplementary uplink band using an implicit indication that comprises configuring only downlink resources on the first frequency band.

16. The non-transitory machine-readable storage medium of claim 15 , wherein the configuring the bandwidth part of the first frequency band comprises restricting the bandwidth part to a non-guard region of the first frequency band, and wherein the configuring the user equipment comprises configuring uplink resources for the user equipment used for random access channel communications in the non-guard region of the first frequency band at an edge of a guard region.

17. The non-transitory machine-readable storage medium of claim 15 , wherein the implicit indication further configuring the user equipment to send uplink communications on the supplementary uplink band comprises setting a random access channel supplementary uplink radio signal received power threshold value to a maximum allowed value.

18. The non-transitory machine-readable storage medium of claim 15 , wherein the configuring the user equipment to send uplink communications on the supplementary uplink band further comprises providing an explicit indication to the user equipment to send the uplink communications on the supplementary uplink band.

19. The non-transitory machine-readable storage medium of claim 15 , wherein the implicit indication further not providing a random access channel configuration via the first frequency band.

20. The non-transitory machine-readable storage medium of claim 15 , wherein the implicit indication further comprises setting the random access channel communications supplementary uplink radio signal received power threshold value to an out-of-range value.