Terminal and radio communication method
AssigneeNtt Docomo, Inc.
InventorsYuki Matsumura, Yuichi Kakishima, Satoshi Nagata
Life of this patent
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Abstract
A terminal according to one aspect of the present disclosure includes: a control section that assumes that a frequency domain orthogonal cover code (FD-OCC) having a sequence length of a number larger than two is applied to a demodulation reference signal mapped to a pair of resource elements the number of which is greater than two and that are being different in frequency; and a transmitting/receiving section that performs transmission processing or reception processing of the demodulation reference signal, based on the FD-OCC. According to one aspect of the present disclosure, even when there are terminals according to different releases, each of the terminals can appropriately perform communication.
Claims10
A terminal comprising:
- a processor that,
- if receiving configuration information of a demodulation reference signal (DMRS) having a greater number of configurable ports than a given number, applies a frequency domain orthogonal cover code (FD-OCC) having a sequence length of a number greater than two to a first DMRS, the first DMRS being mapped to first resource elements having mutually different frequencies, a number of the first resource elements being the number greater than two, and
- if not receiving the configuration information, applies an FD-OCC having a sequence length of two to a second DMRS, the second DMRS being mapped to second resource elements having mutually different frequencies, a number of the second resource elements being the number greater than two;
- and
- a transmitter that transmits the first DMRS or the second DMRS.
A radio communication method for a terminal, comprising:
- in response to configuration information of a demodulation reference signal (DMRS) having a greater number of configurable ports than a given number being received, applying a frequency domain orthogonal cover code (FD-OCC) having a sequence length of a number greater than two to a first DMRS, the first DMRS being mapped to first resource elements having mutually different frequencies, a number of the first resource elements being the number greater than two, and
- in response to the configuration information being not received, applying an FD-OCC having a sequence length of two to a second DMRS, the second DMRS being mapped to second resource elements having mutually different frequencies, a number of the second resource elements being the number greater than two;
- and
- transmitting the first DMRS or the second DMRS.
A base station comprising:
- a receiver that,
- if configuration information of a demodulation reference signal (DMRS) having a greater number of configurable ports than a given number is transmitted to a terminal, receives a first DMRS that is:
- mapped to first resource elements having mutually different frequencies, a number of the first resource elements being a number greater than two, and
- transmitted upon a frequency domain orthogonal cover code (FD-OCC) having a sequence length of the number greater than two being applied to the first DMRS, and
- if the configuration information is not transmitted to the terminal, receives a second DMRS that is:
- mapped to second resource elements having mutually different frequencies, a number of the second resource elements being the number greater than two, and
- transmitted upon an FD-OCC having a sequence length of two being applied to the second DMRS;
- and
- a processor that controls a reception process of the first DMRS or the second DMRS.
A system comprising a terminal and a base station, wherein
- the terminal comprises:
- a processor that,
- if receiving configuration information of a demodulation reference signal (DMRS) having a greater number of configurable ports than a given number, applies a frequency domain orthogonal cover code (FD-OCC) having a sequence length of a number greater than two to a first DMRS, the first DMRS being mapped to first resource elements having mutually different frequencies, a number of the first resource elements being the number greater than two, and
- if not receiving the configuration information, applies an FD-OCC having a sequence length of two to a second DMRS, the second DMRS being mapped to second resource elements having mutually different frequencies, a number of the second resource elements being the number greater than two;
- and
- a transmitter that transmits the first DMRS or the second DMRS, and
- the base station comprises:
- a receiver that receives the first DMRS or the second DMRS.
Dependencies are inferred from the claim text.