Transmit power control for physical random access channels
First Claim
1. An integrated circuit for controlling operation of a communication apparatus, the integrated circuit comprising:
- control circuitry which, in operation;
determines, for each subframe, power for physical uplink shared channel (PUSCH) transmission on a first component carrier which belongs to a first timing advance group (TAG), and determines power for physical random access channel (PRACH) transmission on a second component carrier which belongs to a second TAG, the second TAG being different from the first TAG; and
adjusts, when a total transmission power exceeds a maximum output power configured for the communication apparatus PMAX, the power for PUSCH transmission so that the total transmission power after the adjustment does not exceed PMAX on an overlapped portion of the PUSCH transmission on a first subframe of the first component carrier and PRACH transmission on a second subframe of the second component carrier, the second subframe being a subframe with a time offset from the first subframe along a time axis, wherein the power for PRACH transmission is kept unadjusted; and
at least one output coupled to the control circuitry, which, in operation;
outputs a transport block for transmission over the PUSCH of the first component carrier at the adjusted power for PUSCH transmission, andoutputs a random access preamble for transmission over the PRACH of the second component carrier at the determined power for PRACH transmission.
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Accused Products
Abstract
The invention relates to methods for adjusting the transmit power utilized by a mobile terminal for uplink transmissions, and to methods for adjusting the transmit power used by a mobile terminal for one or more RACH procedures. The invention is also providing apparatus and system for performing these methods, and computer readable media the instructions of which cause the apparatus and system to perform the methods described herein. In order to allow for adjusting the transmit power of uplink transmissions on uplink component carriers, the invention suggests introducing a power scaling for uplink PRACH transmissions performing RACH procedures on an uplink component carrier. The power scaling is proposed on the basis of a prioritization among multiple uplink transmissions or on the basis of the uplink component carriers on which RACH procedures are performed.
34 Citations
8 Claims
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1. An integrated circuit for controlling operation of a communication apparatus, the integrated circuit comprising:
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control circuitry which, in operation; determines, for each subframe, power for physical uplink shared channel (PUSCH) transmission on a first component carrier which belongs to a first timing advance group (TAG), and determines power for physical random access channel (PRACH) transmission on a second component carrier which belongs to a second TAG, the second TAG being different from the first TAG; and adjusts, when a total transmission power exceeds a maximum output power configured for the communication apparatus PMAX, the power for PUSCH transmission so that the total transmission power after the adjustment does not exceed PMAX on an overlapped portion of the PUSCH transmission on a first subframe of the first component carrier and PRACH transmission on a second subframe of the second component carrier, the second subframe being a subframe with a time offset from the first subframe along a time axis, wherein the power for PRACH transmission is kept unadjusted; and at least one output coupled to the control circuitry, which, in operation; outputs a transport block for transmission over the PUSCH of the first component carrier at the adjusted power for PUSCH transmission, and outputs a random access preamble for transmission over the PRACH of the second component carrier at the determined power for PRACH transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification