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CN-116058018-B - Secondary component carrier discard for power headroom

CN116058018BCN 116058018 BCN116058018 BCN 116058018BCN-116058018-B

Abstract

Various aspects of the present disclosure relate generally to wireless communications. In some aspects, a User Equipment (UE) may transmit communications on a primary component carrier and a Secondary Component Carrier (SCC). The UE may suppress transmissions on the SCC based at least in part on an error rate of the transmissions on the SCC and an amount of a transmission power headroom of the UE. Numerous other aspects are provided.

Inventors

  • N. AGARWAL
  • G. Kandelwal
  • S. Kanamalapurdi
  • S.JIN

Assignees

  • 高通股份有限公司

Dates

Publication Date
20260508
Application Date
20210806
Priority Date
20210805

Claims (20)

  1. 1. A User Equipment (UE) for wireless communication, comprising: Memory, and One or more processors coupled to the memory configured to: transmitting communications on a Primary Component Carrier (PCC) and a Secondary Component Carrier (SCC), and Suppressing transmissions on the SCC based at least in part on the UE determining to discard the SCC, wherein the UE determines to discard the SCC using: determining by the UE that an error rate of the transmitted communication on the SCC meets an error threshold, and The UE determines that an amount of transmission power headroom available for transmission by the UE on the SCC does not satisfy a power threshold, Wherein to suppress transmissions on the SCC, the one or more processors are configured to ignore one or more uplink grants for transmissions on the SCC.
  2. 2. The UE of claim 1, wherein the error rate is a block error rate (BLER), and wherein to suppress transmissions on the SCC, the one or more processors are configured to suppress transmissions on the SCC based at least in part on a determination that the BLER satisfies a BLER threshold.
  3. 3. The UE of claim 1, wherein to suppress transmissions on the SCC, the one or more processors are configured to suppress transmissions on the SCC based at least in part on a determination that the error rate is not improved after sending hybrid automatic repeat request feedback.
  4. 4. The UE of claim 1, wherein to suppress transmissions on the SCC, the one or more processors are configured to suppress transmissions on the SCC based at least in part on a determination that an amount of pathloss satisfies a pathloss threshold.
  5. 5. The UE of claim 1, wherein the one or more processors are configured to apply discontinuous transmission on a physical uplink shared channel.
  6. 6. The UE of claim 1, wherein the one or more processors are configured to send, on the PCC, an acknowledgement of data received on the SCC.
  7. 7. The UE of claim 1, wherein the one or more processors are configured to resume transmission on the SCC after a configured duration.
  8. 8. The UE of claim 1, wherein the one or more processors are configured to resume transmission on the SCC based at least in part on a determination that an amount of transmission power headroom of the UE has increased by a threshold amount.
  9. 9. The UE of claim 1, wherein the one or more processors are configured to resume transmission on the SCC based at least in part on a determination that a modulation and coding scheme is reduced by a threshold amount.
  10. 10. The UE of claim 1, wherein the one or more processors are configured to resume transmission on the SCC based at least in part on a determination that resource block allocation is reduced by a threshold amount.
  11. 11. The UE of claim 1, wherein the PCC and the SCC are associated with carrier aggregation.
  12. 12. The UE of claim 1, wherein the PCC and the SCC are associated with a dual connection.
  13. 13. A base station for wireless communication, comprising: Memory, and One or more processors coupled to the memory configured to: scheduling uplink communications for User Equipment (UE) on Primary Component Carrier (PCC) and Secondary Component Carrier (SCC), and Adjusting, by the UE, scheduling of uplink communications of the UE on the SCC based at least in part on the UE determining to discard the SCC by ignoring one or more uplink grants for transmissions on the SCC, wherein the UE determines to discard the SCC using: determining that an error rate of uplink communications on the SCC meets an error threshold, and A determination is made that an amount of transmission power headroom available for transmission by the UE on the SCC does not satisfy a power threshold.
  14. 14. The base station of claim 13, wherein the error rate is a block error rate (BLER), and wherein to adjust the scheduling of uplink communications on the SCC, the one or more processors are configured to adjust the scheduling of uplink communications on the SCC based at least in part on a determination that the BLER meets a BLER threshold.
  15. 15. The base station of claim 13, wherein to adjust the scheduling of uplink communications on the SCC, the one or more processors are configured to adjust the scheduling of uplink communications on the SCC based at least in part on a determination that the error rate did not improve after receiving hybrid automatic repeat request feedback.
  16. 16. The base station of claim 13, wherein to adjust the scheduling of uplink communications on the SCC, the one or more processors are configured to adjust the scheduling of uplink communications on the SCC based at least in part on a determination that an amount of pathloss satisfies a pathloss threshold.
  17. 17. The base station of claim 13, wherein to adjust the scheduling of uplink communications on the SCC, the one or more processors are configured to reduce the scheduling of uplink communications on the SCC.
  18. 18. The base station of claim 13, wherein to adjust the scheduling of uplink communications on the SCC, the one or more processors are configured to refrain from scheduling of uplink communications on the SCC.
  19. 19. The base station of claim 13, wherein the one or more processors are configured to schedule the UE to apply discontinuous transmission on a physical uplink shared channel.
  20. 20. The base station of claim 13, wherein the one or more processors are configured to receive, on the PCC, an acknowledgement of data transmitted on the SCC.

Description

Secondary component carrier discard for power headroom Cross Reference to Related Applications The present patent application claims priority from U.S. provisional patent application No. 62/706,287 entitled "secondary component carrier discard for power headroom" filed on 7 th 8 th 2020 and U.S. non-provisional patent application No. 17/444,495 entitled "secondary component carrier discard for power headroom" filed on 5 th 2021, which are expressly incorporated herein by reference. Technical Field Aspects of the present disclosure relate generally to wireless communications and relate to techniques and apparatuses for dropping (drop) secondary component carriers for power headroom. Background Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. A typical wireless communication system may employ multiple-access techniques capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiple-access techniques include Code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, frequency Division Multiple Access (FDMA) systems, orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the third generation partnership project (3 GPP). A wireless network may include a plurality of Base Stations (BSs) capable of supporting communication for a plurality of User Equipments (UEs). The UE may communicate with the BS via the downlink and uplink. "downlink" or "forward link" refers to the communication link from the BS to the UE, and "uplink" or "reverse link" refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a node B, gNB, an Access Point (AP), a radio head, a transmission-reception point (TRP), a New Radio (NR) BS, or a 5G node B. The multiple access technique described above has been adopted in various telecommunications standards to provide a common protocol that enables different user devices to communicate at the urban, national, regional and even global level. NR, also referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3 GPP. NR aims to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards that use Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the Downlink (DL) (CP-OFDM), CP-OFDM and/or SC-FDM (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)) on the Uplink (UL), and support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to grow, further improvements in LTE, NR and other radio access technologies are needed. Disclosure of Invention In some aspects, a method of wireless communication performed by a User Equipment (UE) includes transmitting communications on a primary component carrier (primary component carrier, PCC) and a secondary component carrier (secondary component carrier, SCC), and refraining from transmitting on the SCC based at least in part on an error rate of the transmission on the SCC and an amount of a transmission power headroom of the UE. In some aspects, a method of wireless communication performed by a base station includes scheduling uplink communication for a UE on a PCC and an SCC, and adjusting scheduling of uplink communication for the UE on the SCC based at least in part on an error rate of a transmission on the SCC and an amount of a transmission power headroom of the UE. In some aspects, a UE for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors configured to transmit communications on a PCC and an SCC and to refrain from transmitting on the SCC based at least in part on an error rate of the transmission on the SCC and an amount of a transmission power headroom of the UE. In some aspects, a base station for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors configured to schedule uplink communications for a UE on a PCC and a SCC and adjust scheduling of uplink communications for the UE on the SCC based at least in part on an error rate of transmissions on the SCC and an amount of a transmission power headroom of the UE. In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communicat