Random access power control method and apparatus and communication system
First Claim
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1. A random access transmission apparatus, comprising:
- a controller configured to determine transmission power of a physical random access channel (PRACH), by estimating a pathloss based on a selected synchronization signal/physical broadcast channel block (SS/PBCH block) or a selected channel state information reference signal; and
a transmitter configured to transmit a preamble via the PRACH,wherein the controller is further configured to;
calculate the transmission power according to a preamble receiving target power obtained based on a power offset and a power ramping counter, the power offset set by a first parameter, andwherein, the first parameter comprises;
a configuration parameter or a parameter related to a subcarrier for the preamble transmission,wherein the controller further determines the transmission power of the preamble according to a maximum transmission power and transmission power needed in transmitting the preamble, and the transmitter is further configured to transmit the preamble via the PRACH at the determined transmission power.
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Abstract
A random access power control apparatus and method and a communication system. The random access power control apparatus includes: a first calculating unit configured to, by using a pathloss estimated based on an synchronization signal/physical broadcast channel block and/or a channel state information reference signal (CSI-RS) currently selected by a UE, calculate transmission power used by the UE in transmitting random access preambles. Hence, the UE may be adapted to UE random access procedures in such complex scenarios as multiple beams.
18 Citations
15 Claims
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1. A random access transmission apparatus, comprising:
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a controller configured to determine transmission power of a physical random access channel (PRACH), by estimating a pathloss based on a selected synchronization signal/physical broadcast channel block (SS/PBCH block) or a selected channel state information reference signal; and a transmitter configured to transmit a preamble via the PRACH, wherein the controller is further configured to; calculate the transmission power according to a preamble receiving target power obtained based on a power offset and a power ramping counter, the power offset set by a first parameter, and wherein, the first parameter comprises;
a configuration parameter or a parameter related to a subcarrier for the preamble transmission,wherein the controller further determines the transmission power of the preamble according to a maximum transmission power and transmission power needed in transmitting the preamble, and the transmitter is further configured to transmit the preamble via the PRACH at the determined transmission power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A random access transmission method, comprising:
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determining a transmission power of a physical random access channel (PRACH) by estimating a pathloss based on a selected synchronization signal/a physical broadcast channel block (SS/PBCH block) or a selected channel state information reference signal, and transmitting a preamble via the PRACH, the random access transmission method further comprising; calculating the transmission power according to a preamble receiving target power based on a power offset and a power ramping counter, the power offset set by a first parameter, wherein, the first parameter comprises a configuration parameter or a parameter related to a subcarrier for the preamble transmission, wherein the method further determines the transmission power of the preamble according to a maximum transmission power and transmission power needed in transmitting the preamble, and the transmitting the preamble via the PRACH is at the determined transmission power. - View Dependent Claims (10, 11, 12, 13)
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14. A communication system, comprising:
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a terminal configured to determine transmission power of a physical random access channel (PRACH) by estimating a pathloss based on a selected synchronization signal/physical broadcast channel block (SS/PBCH block) or a selected channel state information reference signal, and configured to transmit a preamble using the physical random access channel, the terminal is further configured to; calculate the transmission power according to a preamble receiving target power obtained based on a power offset and a power ramping counter, the power offset set by a first parameter, wherein, the first parameter comprises;
a configuration parameter or a parameter related to a subcarrier for the preamble transmission,wherein the terminal further determines the transmission power of the preamble according to a maximum transmission power and transmission power needed in transmitting the preamble; and a base station configured to receive the preamble via the PRACH transmitted at the determined transmission power. - View Dependent Claims (15)
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Specification