Method and apparatus for controlling uplink power in wireless
AssigneeLG Electronics Inc.
InventorYunjung Yi
Life of this patent
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Abstract
Descriptions on the method and the apparatus for controlling uplink transmission power are provided. The method for controlling uplink transmission power comprises receiving a signal on a downlink channel in dual connectivity with master eNB (MeNB) and secondary eNB (SeNB), allocating transmission power for sounding reference signals (SRS) and transmitting SRS to the MeNB and SeNB based on the allocated transmission power. Transmission power may be allocated differently depending on whether the MeNB and the SeNB are synchronous or not.
Claims10
A method of controlling uplink transmission power, by a user equipment, in wireless communication system, the method comprising:
- receiving a signal on a downlink channel in dual connectivity with a master eNB (MeNB) and a secondary eNB (SeNB),
- wherein the signal includes information on transmission power which indicates a power control mode for whether the MeNB and the SeNB are synchronous or asynchronous;
- allocating transmission power for a sounding reference signal (SRS) of the MeNB and a transmission power for a SRS of the SeNB depending on whether the MeNB and the SeNB are synchronous or asynchronous;
- transmitting the SRS of the MeNB to the MeNB based on the allocated transmission power for the SRS of the MeNB;
- and
- transmitting the SRS of the SeNB to the SeNB based on the allocated transmission power for the SRS of the SeNB,
- wherein when the MeNB and the SeNB are asynchronous, subframe i and subframe i+1 of the MeNB overlap subframe j of the SeNB,
- a portion of a total transmission power at a last symbol of the subframe i is allocated to the transmission power for the SRS of the MeNB,
- a portion of the total transmission power at a symbol immediately following a specific boundary in the subframe j is allocated to the transmission power for the SRS of the SeNB, and
- the specific boundary corresponds to a boundary between the subframe i and the subframe i+1.
An apparatus of controlling uplink transmission power, the apparatus comprising:
- a radio frequency (RF) unit for transmitting and receiving a radio signal,
- wherein the radio signal includes information on transmission power which indicates a power control mode for whether a master eNB (MeNB) and a secondary eNB (SeNB) are synchronous or asynchronous;
- and
- a processor operatively coupled to the RF unit, wherein the processor is configured for transmitting signals via the RF unit based on a scheduling for UL and/or downlink (DL),
- wherein the RF unit receives a signal on a downlink channel in dual connectivity with the MeNB and the SeNB, and
- wherein the processor:
- allocates transmission power for a sounding reference signal (SRS) of the MeNB and a transmission power for a SRS of the SeNB depending on whether the MeNB and the SeNB are synchronous or asynchronous;
- transmits the SRS of the MeNB to the MeNB based on the allocated transmission power for the SRS of the MeNB;
- and
- transmits the SRS of the SeNB to the SeNB based on the allocated transmission power for the SRS of the SeNB,
- wherein when the MeNB and the SeNB are asynchronous, subframe i and subframe i+1 of the MeNB overlap subframe j of the SeNB,
- a portion of a total transmission power at a last symbol of the subframe i is allocated to the transmission power for the SRS of the MeNB,
- a portion of the total transmission power at a symbol immediately following a specific boundary in the subframe j is allocated to the transmission power for the SRS of the SeNB, and
- the specific boundary corresponds to a boundary between the subframe i and the subframe i+1.
Dependencies are inferred from the claim text.