Reporting power headroom for aggregated carriers
A method for reporting power headroom-related information for a plurality of aggregated carriers. The method includes reporting in a bitmap the power headroom-related information for a number of the aggregated carriers that is less than or equal to the total number of aggregated carriers, wherein the power headroom-related information is one of a power headroom for at least one of the aggregated carriers and a path loss for at least one of the aggregated carriers.
1. A method implemented in a user agent (UA) comprising a processor and a memory device storing instructions executable by the processor to implement the method, the method comprising:
transmitting, from the UA to an access node, power headroom-related information for a number of aggregated carriers, the number of aggregated carriers comprising a plurality of aggregated carriers that is less than or equal to a total number of the aggregated carriers, the number of aggregated carriers comprising at least a first carrier and a second carrier,
wherein the power headroom-related information includes first information indicating that the power headroom-related information includes a first power headroom value for the first carrier and second information indicating that the power headroom-related information does not include a second power headroom value for the second carrier,
wherein the power headroom-related information is transmitted responsive to expiration of a timer that controls periodic power headroom reports.
2. The method of claim 1 , wherein transmission of the power headroom-related information is triggered when the UA receives a new carrier configuration from the access node and/or a new power headroom (PH) reporting configuration that includes a new reporting carrier.
3. The method of claim 1 , further comprising, transmitting, by the UA, power headroom information for all reporting carriers when a change in a path loss for one of the reporting carriers exceeds a pre-defined amount since a previous power headroom report.
4. The method of claim 1 , wherein transmission of the power headroom-related information is triggered when a new carrier is removed from the aggregated carriers.
5. A user agent (UA) comprising a memory device and a processor configured to execute instructions stored on the memory device such that when executed, cause the UA to:
transmit, via a transmitter on the UA, power headroom-related information for a number of aggregated carriers, the number of aggregated carriers comprising a plurality of aggregated carriers that is less than or equal to a total number of the aggregated carriers, the number of aggregated carriers comprising at least a first carrier and a second carrier,
wherein the UA transmits the power headroom-related information to an access node, wherein the power headroom-related information includes first information indicating that the power headroom-related information includes a first power headroom value for the first carrier and second information indicating that the power headroom-related information does not include a second power headroom value for the second carrier,
wherein the UA transmits the power headroom-related information responsive to expiration of a timer that controls periodic power headroom reports.
6. The UA of claim 5 , wherein transmission of the power headroom-related information is triggered when the UA receives a new carrier configuration from the access node and/or a new power headroom (PH) reporting configuration that includes a new reporting carrier.
7. The UA of claim 5 , wherein, when the change in a path loss for a reporting carrier exceeds a pre-defined amount since a previous power headroom report, the UA transmits a bitmap comprising a consolidated power headroom report (PHR) with power headroom information for all reporting carriers, wherein the bitmap comprises a number of bits equal to a total number of all the reporting carriers.
8. The UA of claim 5 , wherein transmission of the power headroom-related information is triggered when a new carrier is removed from the aggregated carriers.
9. A non-transitory computer medium storing computer readable instructions executable by a processor to implement a method, the method comprising:
transmitting, from a user agent (UA) to an access node, power headroom-related information for a number of aggregated carriers, the number of aggregated carriers comprising a plurality of aggregated carriers that is less than or equal to a total number of the aggregated carriers, the number of aggregated carriers comprising at least a first carrier and a second carrier,
wherein the power headroom-related information includes first information indicating that the power headroom-related information includes a first power headroom value for the first carrier and second information indicating that the power headroom-related information does not include a second power headroom value for the second carrier,
wherein the power headroom-related information is transmitted responsive to expiration of a timer that controls periodic power headroom reports.
10. The non-transitory computer medium of claim 9 , wherein transmission of the power headroom-related information is triggered when the UA receives a new carrier configuration from the access node and/or a new power headroom (PH) reporting configuration that includes a new reporting carrier, and wherein the power headroom-related information comprises a number of bits equal to the number of aggregated carriers for which the power headroom-related information is transmitted.
11. The non-transitory computer medium of claim 9 , wherein, when a change in a path loss for a reporting carrier exceeds a pre-defined amount since a previous power headroom report, the UA transmits a consolidated power headroom report (PHR) for all reporting carriers to the access node.
12. The non-transitory computer medium of claim 9 , wherein transmission of the power headroom-related information is triggered when a new carrier is removed from the aggregated carriers.
13. A method implemented in an access node comprising a processor and a memory device storing instructions executable by the processor to implement the method, the method comprising:
receiving, from a user agent, power headroom-related information for a number of aggregated carriers, the number of aggregated carriers comprising a plurality of aggregated carriers that is less than or equal to a total number of the aggregated carriers, the number of aggregated carriers comprising at least a first carrier and a second carrier,
wherein the power headroom-related information includes first information indicating that the power headroom-related information includes a first power headroom value for the first carrier and second information indicating that the power headroom-related information does not include a second power headroom value for the second carrier,
wherein the power headroom-related information is received responsive to expiration of a timer that controls periodic power headroom reports.
14. The method of claim 13 , wherein transmission of the power headroom-related information is triggered when the access node sends a new carrier configuration to the user agent and/or a new power headroom (PH) reporting configuration that includes a new reporting carrier.
15. The method of claim 13 , wherein, when a change in a path loss for a reporting carrier exceeds a pre-defined amount since a previous power headroom report, the access node is configured to receive, from the user agent, a consolidated power headroom report (PHR) comprising power headroom information for all reporting carriers.
16. The method of claim 13 , wherein transmission of the power headroom-related information is triggered when a new carrier is removed from the aggregated carriers.
17. An access node comprising a memory device and a processor configured to execute instructions stored on the memory device such that when executed, cause the access node to:
receive, via a receiver on the access node, power headroom-related information for a number of aggregated carriers, the number of aggregated carriers comprising a plurality of aggregated carriers that is less than or equal to a total number of the aggregated carriers, the number of aggregated carriers comprising at least a first carrier and a second carrier,
wherein the access node receives the power headroom-related information from a user agent, wherein the power headroom-related information includes first information indicating that the power headroom-related information includes a first power headroom value for the first carrier and second information indicating that the power headroom-related information does not include a second power headroom value for the second carrier,
wherein the power headroom-related information is received responsive to expiration of a timer that controls periodic power headroom reports.
18. The access node of claim 17 , wherein transmission of the power headroom-related information is triggered when the access node sends a new carrier configuration to the user agent and/or a new power headroom (PH) reporting configuration that includes a new reporting carrier.
19. The access node of claim 17 , wherein, when a change in a path loss for a reporting carrier exceeds a pre-defined amount since a previous power headroom report, the access node is configured to receive, from the user agent, a bitmap comprising power headroom information for all reporting carriers, each of the reporting carriers corresponding to a bit in the bitmap.
20. The access node of claim 17 , wherein transmission of the power headroom-related information is triggered when a new carrier is removed from the aggregated carriers.