IP Library › Granted Patent US 12712591
Granted Patent B2
US 12712591 · App. 19/009,285 · Granted Aug 18, 2026

Information processing apparatus, transmission-side apparatus and method

Inventors: Kenichi Takizawa (Koganei, JP); Masafumi Moriyama (Koganei, JP)
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
H04B1/62H04B1/1027H04B2001/1045
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Quick Facts
Patent No.
US 12712591
App. No.
19/009,285
Granted
Aug 18, 2026
Kind
B2
Abstract

When signals are simultaneously received from K transmission-side apparatuses by a receiving antenna, and repetition is performed by the K transmission-side apparatuses, an information processing apparatus is configured to: in order to obtain a transmitted reference signal x(k, n) transmitted from a transmission-side apparatus k (k=1, . . . , K) by the n-th reference signal transmission in the repetition, acquire a phase rotation amount φ(g, n) given to a transmitted reference signal x(k) and assigned to a group g to which the transmission-side apparatus k belongs and transmit the phase rotation amount φ(g, n) to the transmission-side apparatus k. The phase rotation amount φ(g, n) is acquired so that received reference signals from transmission-side apparatuses not belonging to the group g are cancelled when a phase rotation amount opposite to the phase rotation amount φ(g, n) is given to a received reference signal r(n), and the first to N-th received reference signals in the repetition are added.

Claims (60)

1 . A method executed by a computer, comprising:

determining transmission power of each of a plurality of transmission-side apparatuses by subtracting at least requested power difference between the plurality of transmission-side apparatuses from transmission power of a preceding transmission-side apparatus when the plurality of transmission-side apparatuses are arranged in a predetermined order, wherein signals from the plurality of transmission-side apparatuses are superimposed and received by a first antenna and the plurality of transmission-side apparatuses perform repetition of repeatedly and successively transmitting a same signal predetermined times; and

notifying each of the plurality of transmission-side apparatuses of a value of the transmission power determined for each of the plurality of transmission-side apparatuses.

2 . The method according to claim 1 , further comprising

obtaining a path loss to the first antenna for each of the plurality of transmission-side apparatuses,

wherein

when the number of the plurality of transmission-side apparatuses is K (K: a positive integer), the computer determines the transmission power of k-th (k=1, . . . , K) transmission-side apparatus in the predetermined order to be a value obtained by subtracting, from the transmission power of k−1-th transmission-side apparatus, the requested power difference and a value obtained by subtracting a path loss of the k−1-th transmission-side apparatus from a path loss of the k-th transmission-side apparatus.

3 . The method according to claim 2 , further comprising

arranging the plurality of transmission-side apparatuses in ascending order of the path loss as the predetermined order.

4 . The method according to claim 2 , wherein

the computer obtains, for each of the plurality of transmission-side apparatuses, the path loss by subtracting, from first transmission power, received power at the first antenna of a signal transmitted at the first transmission power.

5 . The method according to claim 4 , further comprising:

transmitting to each of the plurality of transmission-side apparatuses, an instruction to transmit a signal at the first transmission power; and

obtaining, for each of the plurality of transmission-side apparatuses, the received power at the first antenna of the signal transmitted at the first transmission power.

6 . The method according to claim 2 , wherein

the computer obtains, for each of the plurality of transmission-side apparatuses, the path loss by subtracting, from second transmission power of the first antenna, received power of a signal transmitted from the first antenna at the second transmission power.

7 . The method according to claim 6 , further comprising:

transmitting, to each of the plurality of transmission-side apparatuses, an instruction to report the received power of the signal transmitted from the first antenna; and

obtaining, for each of the plurality of transmission-side apparatuses, the received power of the signal transmitted from the first antenna.

8 . The method according to claim 1 , wherein

the signals transmitted from the plurality of transmission-side apparatuses are transmitted by Non-Orthogonal Multiple Access (NOMA) to be received by the first antenna in a superimposed state and, and

a device equipped with the first antenna adds up the signals in a superimposed state transmitted for the predetermined times by the plurality of transmission-side apparatuses by the repetition, and performs successive interference cancellation (SIC) to remove interference between the signals transmitted from each of the plurality of transmission-side apparatuses from a signal after addition, thereby acquiring the signals transmitted from each of the plurality of transmission-side apparatuses.

9 . An information processing apparatus comprising a processor configured to:

determine transmission power of each of a plurality of transmission-side apparatuses by subtracting at least requested power difference between the plurality of transmission-side apparatuses from transmission power of a preceding transmission-side apparatus when the plurality of transmission-side apparatuses are arranged in a predetermined order, wherein signals from the plurality of transmission-side apparatuses are superimposed and received by a first antenna and the plurality of transmission-side apparatuses perform repetition of repeatedly and successively transmitting a same signal predetermined times; and

notify each of the plurality of transmission-side apparatuses of a value of the transmission power determined for each of the plurality of transmission-side apparatuses.

10 . The information processing apparatus according to claim 9 , wherein

the processor is further configured to obtain a path loss to the first antenna for each of the plurality of transmission-side apparatuses, and

when the number of the plurality of transmission-side apparatuses is K (K: a positive integer), the processor is configured to determine the transmission power of k-th (k=1, . . . , K) transmission-side apparatus in the predetermined order to be a value obtained by subtracting, from the transmission power of k−1-th transmission-side apparatus, the requested power difference and a value obtained by subtracting a path loss of the k−1-th transmission-side apparatus from a path loss of the k-th transmission-side apparatus.

11 . The information processing apparatus according to claim 10 , wherein

the processor is further configured to arrange the plurality of transmission-side apparatuses in ascending order of the path loss as the predetermined order.

12 . The information processing apparatus according to claim 10 , wherein

the processor is configured to obtain, for each of the plurality of transmission-side apparatuses, the path loss by subtracting, from first transmission power, received power at the first antenna of a signal transmitted at the first transmission power.

13 . The information processing apparatus according to claim 12 , wherein the processor is further configured to:

transmit to each of the plurality of transmission-side apparatuses, an instruction to transmit a signal at the first transmission power; and

obtain, for each of the plurality of transmission-side apparatuses, the received power at the first antenna of the signal transmitted at the first transmission power.

14 . The information processing apparatus according to claim 10 , wherein

the processor is configured to obtain, for each of the plurality of transmission-side apparatuses, the path loss by subtracting, from second transmission power of the first antenna, received power of a signal transmitted from the first antenna at the second transmission power.

15 . The information processing apparatus according to claim 14 , wherein

the processor is further configured to transmit, to each of the plurality of transmission-side apparatuses, an instruction to report the received power of the signal transmitted from the first antenna; and

obtaining, for each of the plurality of transmission-side apparatuses, the received power of the signal transmitted from the first antenna.

16 . The information processing apparatus according to claim 9 , wherein

the signals transmitted from the plurality of transmission-side apparatuses are transmitted by Non-Orthogonal Multiple Access (NOMA) to be received by the first antenna in a superimposed state and, and

a device equipped with the first antenna adds up the signals in a superimposed state transmitted for the predetermined times by the plurality of transmission-side apparatuses by the repetition, and performs successive interference cancellation (SIC) to remove interference between the signals transmitted from each of the plurality of transmission-side apparatuses from a signal after addition, thereby acquiring the signals transmitted from each of the plurality of transmission-side apparatuses.

17 . A transmission-side apparatus comprising a processor configured to:

receive an instruction to perform repetition of repeatedly and successively transmitting a same signal predetermined times, the signal superimposed with one or more signals from one or more other transmission-side apparatus to be received by a first antenna; and

receive a value of transmission power used in the repetition, the transmission power being a value obtained by subtracting at least requested power difference between transmission-side apparatuses from transmission power of a preceding other transmission-side apparatus when arranged in a predetermined order with the one or more other transmission-side apparatuses.

18 . The transmission-side apparatus according to claim 17 , wherein

the value of transmission power is determined to be a value obtained by subtracting the requested power difference and a value obtained by subtracting a path loss of the preceding other transmission-side apparatus from a path loss of the transmission-side apparatus, from the transmission power of the preceding other transmission-side apparatus.

19 . The transmission-side apparatus according to claim 18 , wherein

the processor is further configured to:

receive an instruction to transmit a signal at first transmission power; and

transmit a signal at first transmission power to the first antenna,

wherein

the pass loss from the transmission-side apparatus to the first antenna is obtained by subtracting, from the first transmission power, received power at the first antenna of the signal transmitted at the first transmission power.

20 . The transmission-side apparatus according to claim 18 , wherein

the processor is configured to:

receive an instruction to report received power of a signal transmitted at second transmission power from the first antenna; and

report the received power of a signal transmitted at second transmission power from the first antenna,

wherein

the pass loss from the transmission-side apparatus to the first antenna is obtained by subtracting, from the second transmission power of the first antenna, the received power of a signal transmitted from the first antenna at the second transmission power and reported from the transmission-side apparatus.