Uplink carrier access
One or more devices, systems, and/or methods for facilitating access to an uplink carrier are provided. For example, information corresponding to a plurality of uplink carriers may be received from a wireless node. An uplink carrier may be selected from the plurality of uplink carriers based upon the information. A request to access the uplink carrier may be transmitted to the wireless node.
1. A method comprising:
receiving information corresponding to a plurality of uplink carriers, wherein the information comprises an indication of a frequency of an uplink carrier, a random access channel (RACH) common configuration, and a time alignment (TA) timer common configuration;
selecting one uplink carrier from the plurality of uplink carriers based upon the information,
wherein the selection is based on comparing a Reference Signal Received Power (RSRP) of a downlink carrier to a threshold,
wherein the one uplink carrier has a first frequency in response to the RSRP being below the threshold,
wherein the one uplink carrier has a second frequency in response to the RSRP being above the threshold, and
wherein the first frequency is lower than the second frequency; and
performing random access using the one uplink carrier; and
in response to determining that the uplink carrier is out of step compared to a TA timer, transmitting a request to access a second uplink carrier from the plurality of uplink carriers.
2. The method of claim 1 , wherein the information corresponding to the plurality of uplink carriers includes a bandwidth of each uplink carrier of the plurality of uplink carriers.
3. The method of claim 1 , wherein the information corresponding to the plurality of uplink carriers includes an extra-spectrum leakage of each uplink carrier of the plurality of uplink carriers.
4. The method of claim 1 , wherein the information corresponding to the plurality of uplink carriers includes a maximum transmission power of each uplink carrier of the plurality of uplink carriers.
5. The method of claim 1 , further comprising:
determining priorities of the plurality of uplink carriers based on frequencies corresponding to the plurality of uplink carriers.
6. An apparatus comprising a processor configured to:
receive information corresponding to a plurality of uplink carriers, wherein the information comprises an indication of a frequency of an uplink carrier, a random access channel (RACH) common configuration, and a time alignment (TA) timer common configuration;
select one uplink carrier from the plurality of uplink carriers based upon the information,
wherein the selection is based on comparing a Reference Signal Received Power (RSRP) of a downlink carrier to a threshold,
wherein the one uplink carrier has a first frequency in response to the RSRP being below the threshold,
wherein the one uplink carrier has a second frequency in response to the RSRP being above the threshold, and
wherein the first frequency is lower than the second frequency; and
perform random access using the one uplink carrier; and
in response to a determination that the uplink carrier is out of step compared to a TA timer, transmit a request to access a second uplink carrier from the plurality of uplink carriers.
7. The apparatus of claim 6 , wherein the information corresponding to the plurality of uplink carriers includes a bandwidth of each uplink carrier of the plurality of uplink carriers.
8. The apparatus of claim 6 , wherein the information corresponding to the plurality of uplink carriers includes an extra-spectrum leakage of each uplink carrier of the plurality of uplink carriers.
9. The apparatus of claim 6 , wherein the information corresponding to the plurality of uplink carriers includes a maximum transmission power of each uplink carrier of the plurality of uplink carriers.
10. The apparatus of claim 6 , wherein the processor is further configured to:
determine priorities of the plurality of uplink carriers based on frequencies corresponding to the plurality of uplink carriers.
11. A non-transitory computer readable medium comprising processor executable instructions that when executed by a processor configures the processor to perform a method comprising:
receiving information corresponding to a plurality of uplink carriers, wherein the information comprises an indication of a frequency of an uplink carrier, a random access channel (RACH) common configuration, and a time alignment (TA) timer common configuration;
selecting one uplink carrier from the plurality of uplink carriers based upon the information,
wherein the selection is based on comparing a Reference Signal Received Power (RSRP) of a downlink carrier to a threshold,
wherein the one uplink carrier has a first frequency in response to the RSRP being below the threshold,
wherein the one uplink carrier has a second frequency in response to the RSRP being above the threshold, and
wherein the first frequency is lower than the second frequency; and
performing random access using the one uplink carrier; and
in response to determining that the uplink carrier is out of step compared to a TA timer, transmitting a request to access a second uplink carrier from the plurality of uplink carriers.
12. The non-transitory computer readable medium of claim 11 , wherein the information corresponding to the plurality of uplink carriers includes a bandwidth of each uplink carrier of the plurality of uplink carriers.
13. The non-transitory computer readable medium of claim 11 , wherein the information corresponding to the plurality of uplink carriers includes an extra-spectrum leakage of each uplink carrier of the plurality of uplink carriers.
14. The non-transitory computer readable medium of claim 11 , wherein the information corresponding to the plurality of uplink carriers includes a maximum transmission power of each uplink carrier of the plurality of uplink carriers.
15. The non-transitory computer readable medium of claim 11 , wherein the method further comprises:
determining priorities of the plurality of uplink carriers based on frequencies corresponding to the plurality of uplink carriers.
16. A system comprising:
a base station configured to:
transmit information corresponding to a plurality of uplink carriers, wherein the information comprises an indication of a frequency of an uplink carrier, a random access channel (RACH) common configuration, and a time alignment (TA) timer common configuration;
a wireless device configured to:
receive the information corresponding to the plurality of uplink carriers;
select one uplink carrier from the plurality of uplink carriers based upon the information,
wherein the selection is based on comparing a Reference Signal Received Power (RSRP) of a downlink carrier to a threshold,
wherein the one uplink carrier has a first frequency in response to the RSRP being below the threshold,
wherein the one uplink carrier has a second frequency in response to the RSRP being above the threshold, and
wherein the first frequency is lower than the second frequency; and
perform random access using the one uplink carrier; and
in response to a determination that the uplink carrier is out of step compared to a TA timer, transmit a request to access a second uplink carrier from the plurality of uplink carriers.
17. The system of claim 16 , wherein the information corresponding to the plurality of uplink carriers includes a bandwidth of each uplink carrier of the plurality of uplink carriers.
18. The system of claim 16 , wherein the information corresponding to the plurality of uplink carriers includes an extra-spectrum leakage of each uplink carrier of the plurality of uplink carriers.
19. The system of claim 16 , wherein the information corresponding to the plurality of uplink carriers includes a maximum transmission power of each uplink carrier of the plurality of uplink carriers.
20. The system of claim 16 , wherein the wireless device is further configured to:
determine priorities of the plurality of uplink carriers based on frequencies corresponding to the plurality of uplink carriers.