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Power control method of physical sidelink feedback channel and terminal
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A technology of feedback channel and power control, applied in the field of communication, can solve the problem of inability to determine the transmission power of PSFCH
Active Publication Date: 2020-10-27
VIVO MOBILE COMM CO LTD
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[0003] Embodiments of the present invention provide a power control method and a terminal for a physical sidelink feedback channel, so as to solve the problem in the related art that the transmission power of PSFCH cannot be determined
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Embodiment 1
[0048] Assumption: the terminal performs sidelink multicast communication, and the communication range of a certain multicast service is 400m. According to the QoS requirements, it is determined that the value range of the PSFCH power adjustment window is [3dBm, 20dBm], that is, about [0.005w, 0.1w]. Assuming that the mapping relationship between the distance between the receiving terminal and the transmitting terminal and the PSFCH transmission power is a linear correlation, the formula is expressed as:
[0049]
[0050] Among them, x represents the actual distance between the receiving terminal and the transmitting terminal, y represents the transmission power of PSFCH; 0.2 is the maximum transmission power of the receiving terminal 0.2w, which is 23dBm; 500 is the cut-off point N of the distance between the receiving terminal and the transmitting terminal at the maximum transmission power.
[0051] Taking the sending terminal as UE1 and the receiving terminals as UE2, UE...
Embodiment 2
[0072] Assumption: the terminal performs sidelink multicast communication, and the communication range of a certain multicast service is 500m. Determine a set of PSFCH power adjustment candidate values (+5dB, +3dB, +1dB, -1dB, -3dB) according to QoS requirements;
[0073] The relationship between the distance between the receiving terminal and the sending terminal and the power adjustment candidate value is as follows:
[0074] The distance between the receiving terminal and the transmitting terminal (0, 100m) corresponds to the power adjustment value -3dB;
[0075] The distance between the receiving terminal and the transmitting terminal (100, 200m) corresponds to the power adjustment value -1dB;
[0076] The distance between the receiving terminal and the transmitting terminal (200, 300m) corresponds to the power adjustment value +1dB;
[0077] The distance between the receiving terminal and the transmitting terminal (300, 400m) corresponds to the power adjustment value ...
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Abstract
The invention provides a power control method of a physical sidelink feedback channel and a terminal, and relates to the technical field of communication. The power control method of the physical sidelink feedback channel comprises the following steps: acquiring a first distance between a receiving terminal and a sending terminal; and determining the sending power of the receiving terminal in a physical sidelink feedback channel (PSFCH) according to the first distance. According to the scheme, the sending power of each receiving terminal on the PSFCH is determined based on the distance betweenthe receiving terminal and the sending terminal, and the sending terminal is ensured to receive the feedback information of each receiving terminal on the PSFCH at the similar power, so that the interference and IBE interference between UE are reduced, and the receiving success rate of the feedback information is improved.
Description
technical field [0001] The present invention relates to the field of communication technology, in particular to a power control method and a terminal of a physical sidelink feedback channel. Background technique [0002] Current sidelink (sidelink) transmission is mainly divided into several transmission forms: broadcast (broadcast), groupcast (groupcast) and unicast (unicast). Among them, for multicast communication, it is a one-to-many communication mode. When the Hybridautomatic repeat request (HARQ) function is enabled, if any receiving end user in the group fails to receive correctly, it will cause HARQ retransmission. pass. The HARQ feedback of the receiving terminal is sent on the physical sidelink feedback channel PSFCH. In the related art, there is no clear method to determine the sending power of the receiving terminal on the PSFCH. Contents of the invention [0003] Embodiments of the present invention provide a power control method of a physical sidelink fee...
Claims
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