JPWO2018024068A5 - - Google Patents

Description

This application claims the priority of Chinese Patent Application No. 201610634461.3. Filed on August 4, 2016, the entire contents of which are incorporated herein by reference.

The present disclosure relates to the field of communication technology, and more particularly to methods and devices for dynamically determining the transmission position of UL (upstream) DMRS (Demodulation Reference Signal).

LTE (Long Term Evolution) FDD (Frequency Division Duplex Dual Structure Division Duplex) The system adopts frame structure type 1 (frame structure type 1) Shown in 1. In the FDD system, uplink and downlink transmissions use different carrier frequencies, but uplink and downlink transmissions use the same frame structure. On each carrier, a 10 ms long radio frame contains 10 1 ms subframes, each subframe divided into two 0.5 ms long time slots. The TTI (Transmission Time Interval) time length of upstream and downstream data transmission is 1 ms.

Conventional LTE TDD (Time Division Duplex) systems use frame structure type 2 (abbreviated as frame structure type 2, FS2), as shown in FIG. In TDD systems, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each radio frame with a length of 10 ms of FS2 is composed of two half frames with a length of 5 ms, and each half frame includes five subframes with a length of 1 ms. The FS2 subframes are classified into three categories: downlink subframe, uplink subframe, and special subframe, and each special subframe has a downlink transmission time slot (DwPTS: downlink pilot time slot) and a guard interval (guard interval). It consists of three parts: GP: guard period) and uplink transmission time slot (UpPTS: uplink pilot time slot). Each halfframe comprises at least one downlink subframe, at least one uplink subframe, and one or less special subframes.

The general operating method of short TTI transmission is that the subframe structure defined by the conventional LTE mechanism includes a plurality of short TTI transmissions shorter than 1 ms. The length of the short TTI should be 2, 3, 4, or 7 OFDM (Orthogonal Frequency Division Multiple Access) or SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbols. However, it is natural not to exclude those with less than 14 symbols or shorter time lengths than 1 ms. The subframe has a plurality of short TTIs, and each short TTI performs a shortened physical uplink control channel (sPUCCH) or a shortened physical uplink shared channel (sPUSCH). Can be scheduled to the same terminal or different terminals.

In LTE systems, channel transmissions and DMRS patterns (patterns) are defined on a subframe basis, and short TTI transmissions support a wide variety of short TTI lengths and include multiple short TTI transmissions in one subframe. Therefore, if DMRS is included in each short TTI, the overhead of DMRS will be too large.

Therefore, in the conventional LTE system standard, there is no DMRS method applicable to short TTI transmission.

In view of the above technical issues, the embodiments of the present disclosure reduce the overhead of DMRS in short TTI transmission by dynamically determining the transmission position of the uplink DMRS in order to solve the technical issue. Provided are a method and an apparatus for dynamically determining a transmission position of an upstream DMRS.

According to the first aspect of the embodiment of the present disclosure, the terminal receives a downlink control channel, and the terminal determines a transmission position of an uplink demodulation reference signal (DMRS) according to the downlink control channel. A method of dynamically determining the transmission position of the upstream DMRS is provided.

As an option, the downlink control channel is a downlink control channel that uses the uplink DCI format, and the terminal determines the transmission position of the uplink DMRS according to the downlink control channel so that the terminal determines the downlink according to the downlink control channel. It involves determining the DMRS transmission position of the shortened physical uplink shared channel (sPUSCH) scheduled by the control channel.

Optionally, the sPUSCH and DMRS use different scheduling sequences.

Optionally, this method predefines to schedule a sPUSCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the uplink DCI format, said sPUSCH. DMRS is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are the downlink. It is a value notified by the control channel, and the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance that the sPUSCH to be transmitted and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however, k1. , K2 is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel, k1, k2, and m1. , M2 is a subframe, short TTI or SC-FDMA symbol, where n is a natural number, or n + k by a downlink control channel transmitted in subframe or short TTI with number n and using the uplink DCI format. It is predefined to schedule the sPUSCH transmitted at the time region position of, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value, or. The value notified by the downlink control channel, m2 is the value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined values. Or a preset value or a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, and the units of k1, k2, and m2 are subframe, short TTI, or SC. -Schedule a sPUSCH that is an FDMA symbol, n is a natural number, or is transmitted in a subframe of number n or a short TTI and is transmitted at the time region position of n + k by a downlink control channel using the uplink DCI format. It is defined in advance that sPUSCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k + m by a downlink control channel using the uplink DCI format. The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUSCH transmission scheduled by the control channel exists, where k is a predefined value or a pre-defined value. The set value or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframes, short TTIs or SC-FDMA symbols. , N is a natural number.

Optionally, this method further comprises predefining multiple uplink DMRS patterns, where each DMRS pattern is divided into short TTIs and DMRS locations in one subframe or time slot, or DMRS short. One of a plurality of predefined uplink DMRS patterns, including at least a relative positional relationship with TTI, is indicated in the downlink control channel instruction field.

Optionally, the downlink control channel is a downlink control channel that uses the downlink DCI format, and the terminal determines the transmission position of the uplink DMRS according to the downlink control channel so that the terminal follows the downlink control channel. It includes determining the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

Optionally, this method predefines to schedule a sPUCCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the downlink DCI format, said sPUCCH. DMRS is transmitted in the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are the downlink. It is a value notified by the control channel, and the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance that the sPUCCH to be transmitted and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however, k1. , K2 is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel, k1, k2, and m1. , M2 is a subframe, short TTI or SC-FDMA symbol, where n is a natural number, or n + k by a downlink control channel transmitted in subframe or short TTI with number n and using downlink DCI format. It is predefined to schedule the sPUCCH transmitted at the time region position of, and the DMRS of the sPUCCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value, or. The value notified by the downlink control channel, m2 is the value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined values. Or a preset value or a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, and the units of k1, k2, and m2 are subframe, short TTI, or SC. -Schedule a sPUCCH that is an FDMA symbol, n is a natural number, or is transmitted in a subframe of number n or a short TTI and is transmitted at a time region position of n + k by a downlink control channel using the downlink DCI format. It is defined in advance, or it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format is scheduled. The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission corresponding to the control channel exists, where k is a predefined value or preset. The value given or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframes, short TTIs or SC-FDMA symbols. Includes that n is a natural number.

Optionally, when multiple terminal time division multiplexing (TDM) use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit the DMRS, of which one time slot / A specific position for transmitting DMRS in the subframe is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

According to the second aspect of the embodiment of the present disclosure, it is a method for dynamically determining the transmission position of the uplink DMRS, in which the base station determines the transmission position of the uplink DMRS and the base station determines the transmission position of the uplink DMRS. It includes transmitting a control channel to notify the terminal of information for determining the transmission position of the upstream DMRS.

Optionally, the downlink control channel is a downlink control channel that uses the uplink DCI format, and the base station determining the transmission position of the uplink DMRS is a shortening of the base station scheduled by the downlink control channel. This includes determining the DMRS transmission position of the physical uplink shared channel sPUSCH and notifying the terminal of information for determining the DMRS transmission position by the downlink control channel.

Optionally, the sPUSCH and DMRS use different scheduling sequences.

Optionally, this method predefines to schedule a sPUSCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the uplink DCI format, said sPUSCH. DMRS is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are the downlink. It is a value notified by the control channel, and the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance that the sPUSCH to be transmitted and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however, k1. , K2 is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel, k1, k2, and m1. , M2 is a subframe, short TTI or SC-FDMA symbol, where n is a natural number, or n + k by a downlink control channel transmitted in subframe or short TTI with number n and using the uplink DCI format. It is predefined to schedule the sPUSCH transmitted at the time region position of, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value, or. The value notified by the downlink control channel, m2 is the value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined values. Or a preset value or a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, and the units of k1, k2, and m2 are subframe, short TTI, or SC. -Schedule a sPUSCH that is an FDMA symbol, n is a natural number, or is transmitted in a subframe of number n or a short TTI and is transmitted at the time region position of n + k by a downlink control channel using the uplink DCI format. It is defined in advance that sPUSCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k + m by a downlink control channel using the uplink DCI format. The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUSCH transmission scheduled by the control channel exists, where k is a predefined value or a pre-defined value. The set value or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframes, short TTIs or SC-FDMA symbols. , N includes being a natural number.

Optionally, this method further comprises predefining multiple uplink DMRS patterns, where each DMRS pattern is divided into short TTIs and DMRS locations in one subframe or time slot, or DMRS short. One of a plurality of predefined uplink DMRS patterns, including at least a relative positional relationship with TTI, is indicated in the downlink control channel instruction field.

As an option, the downlink control channel is a downlink control channel that uses the downlink DCI format, and the base station determines the transmission position of the uplink DMRS so that the base station corresponds to the downlink control channel. This includes determining the transmission position of the DMRS of the sPUCCH for transmitting the NACK feedback information, and notifying the terminal of the information for determining the transmission position of the DMRS by the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

Optionally, this method predefines to schedule a sPUCCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the downlink DCI format, said sPUCCH. DMRS is transmitted in the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are the downlink. It is a value notified by the control channel, and the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, or is transmitted in a subframe or short TTI of number n and is in downlink DCI format. It is defined in advance that the sPUCCH transmitted in the time region position of n + k1 + m1 is scheduled by the downlink control channel using The value, the preset value, or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the units of k1, k2, m1, and m2 are subs. Schedule a sPUCCH that is a frame, short TTI or SC-FDMA symbol, or transmitted in a subframe or short TTI of number n and transmitted in the time region position of n + k by a downlink control channel using the downlink DCI format. Is defined in advance, and the DMRS of the sPUCCH is transmitted at the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel. m2 is a value notified by the downlink control channel, the unit of k and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance to schedule the sPUCCH transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is transmitted in the time region position of n + k2 + m2, however, k1. , K2 is a predefined value, a preset value, or the downlink. The value notified by the control channel, m2 is the value notified by the downlink control channel, the units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols, and n is a natural number. It is also defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format is scheduled, or the sub of the number n. It is defined in advance that the sPUCCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format is scheduled, and the sPUCCH transmission corresponding to the downlink control channel exists. The DMRS index position, which is the number of the SC-FDMA symbol in the frame or time slot, is indicated by the downlink control channel, where k is notified by a predefined value, a preset value, or the downlink control channel. It is a value given, m is a value notified by the downlink control channel, the unit of k and m is a subframe, a short TTI or an SC-FDMA symbol, and n is a natural number.

As an option, when multiple terminal TDMs use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit DMRS, of which DMRS in one time slot / subframe. A specific position for transmission is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

According to the third aspect of the embodiment of the present disclosure, a terminal including a receiving module that receives a downlink control channel and a first determination module that determines a transmission position of an uplink demodulation reference signal (DMRS) according to the downlink control channel. Further provide.

Optionally, the downlink control channel is a downlink control channel that uses the uplink DCI format, and the decision module further sets the DMRS transmission position of the shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel. Determined according to the downlink control channel.

Optionally, the sPUSCH and DMRS use different scheduling sequences.

The terminal further comprises a first setting module, the first setting module being transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k + m1 by a downlink control channel using the uplink DCI format. Predefined to schedule sPUSCH, DMRS of said sPUSCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is notified by a predefined value, a preset value, or the downlink control channel. The values are m1 and m2 are the values notified by the downlink control channel, the units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number or. The first setting module is defined in advance to schedule a sPUSCH transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k1 + m1 by a downlink control channel using the uplink DCI format. The sPUSCH DMRS is transmitted at a time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined or preset values or values notified by the downlink control channel, m1, m2. Is the value notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, n is a natural number, or the first setting module is used. , It is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is set to the time of n + k + m2. It is transmitted at the region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, where n is a natural number, or the first setting module is transmitted in subframes or short TTIs numbered n and is in uplink DCI format. Predefined to schedule the sPUSCH transmitted in the time region position of n + k1 by the downlink control channel using. The DMRS of the sPUSCH is transmitted at a time region position of n + k2 + m2, where k1 and k2 are predefined or preset values or values notified by the downlink control channel, where m2 is the downlink. It is a value notified by the control channel, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the first setting module is a sub of the number n. Predefined to schedule sPUSCH transmitted in frame or short TTI and transmitted in the time region position of n + k by downlink control channel using uplink DCI format, or transmitted in subframe or short TTI number n , SC-in a subframe or time slot in which a downlink control channel using the uplink DCI format predefines scheduling sPUSCH transmissions at n + k + m time region positions and where sPUSCH transmissions scheduled by said downlink control channels are present. The DMRS index position, which is the number of the FDMA symbol, is indicated by the downlink control channel, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m. Is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.

Optionally, the terminal further comprises a second configuration module that predefines a plurality of uplink DMRS patterns, where each DMRS pattern is divided into each short TTI and the location of the DMRS in one subframe or time slot, or One of a plurality of predefined uplink DMRS patterns, including at least the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

Optionally, the downlink control channel is a downlink control channel that uses the downlink DCI format, and the determination module further positions the DMRS transmission position of the sPUCCH that transmits the ACK / NACK feedback information corresponding to the downlink control channel. Determined according to the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

As an option, the terminal further comprises a third setting module, which is transmitted in a subframe of number n or a short TTI and at a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. It is defined in advance that the sPUCCH to be transmitted is scheduled, and the DMRS of the sPUCCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or the downlink control. The values notified by the channel, m1 and m2 are the values notified by the downlink control channel, the units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Yes, or pre-defined that the third setting module schedules sPUCCH transmitted in subframes or short TTIs with number n and transmitted in a time region position of n + k1 + m1 by a downlink control channel using the downlink DCI format. Then, the DMRS of the sPUCCH is transmitted at the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predetermined values, preset values, or values notified by the downlink control channel. m1 and m2 are values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number or the third. It is defined in advance that the setting module schedules the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, where n is a natural number, or the third setting module is transmitted in subframes or short TTIs numbered n. Schedule sPUCCH transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format. This is defined in advance, and the DMRS of the sPUCCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are predetermined values, preset values, or values notified by the downlink control channel. Yes, m2 is the value notified by the downlink control channel, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the third setting module. Predefined to schedule a sPUCCH transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k by a downlink control channel using the downlink DCI format, or a subframe of number n or It is defined in advance that the sPUCCH transmitted in the short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format is scheduled, and the subframe or the subframe in which the sPUCCH transmission corresponding to the downlink control channel exists. The DMRS index position, which is the number of the SC-FDMA symbol in the time slot, is indicated by the downlink control channel, where k is notified by a predefined value, a preset value, or the downlink control channel. It is a value, m is a value notified by the downlink control channel, the unit of k and m is a subframe, a short TTI or an SC-FDMA symbol, and n is a natural number.

Optionally, when multiple terminal time division multiplexing (TDM) use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit the DMRS, of which one time slot / A specific position for transmitting DMRS in the subframe is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

According to the fourth aspect of the embodiment of the present disclosure, the second determination module for determining the transmission position of the uplink DMRS and the information for transmitting the downlink control channel to determine the transmission position of the uplink DMRS. Provides a base station provided with a notification module for notifying the terminal.

Optionally, the downlink control channel is a downlink control channel that uses the uplink DCI format, and the second decision module further comprises a DMRS transmission position on the shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel. Is determined, and information for determining the transmission position of the DMRS is notified to the terminal by the downlink control channel.

Optionally, the sPUSCH and DMRS use different scheduling sequences.

As an option, the base station further comprises a fourth setting module, which is transmitted in a subframe of number n or a short TTI and has a time region position of n + k + m1 by a downlink control channel using the uplink DCI format. It is defined in advance that the sPUSCH to be transmitted is scheduled, and the DMRS of the sPUSCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or the downlink. The values notified by the control channel, m1 and m2 are the values notified by the downlink control channel, the units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, the fourth setting module is scheduled to schedule sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format. Defined and transmitted the DMRS of the sPUSCH at a time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined or preset values or values notified by the downlink control channel. , M1 and m2 are values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number or the above-mentioned first. 4 It is defined in advance that the setting module schedules the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format, and DMRS of the sPUSCH. Is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is notified by the downlink control channel. It is a value, the unit of k, m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the fourth setting module is transmitted in a subframe or a short TTI of number n. Schedule sPUSCH to be transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format. Is defined in advance, and the DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are preset values, preset values, or values notified by the downlink control channel. M2 is the value notified by the downlink control channel, the units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols, and n is a natural number, or the fourth setting. Predefined that the module schedules a sPUSCH transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k by a downlink control channel using the uplink DCI format, or a subframe of number n. Alternatively, it is defined in advance that the sPUSCH transmitted in the short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel exists. The DMRS index position, which is the number of the SC-FDMA symbol in the frame or time slot, is indicated by the downlink control channel, where k is notified by a predefined value, a preset value, or the downlink control channel. It is a value given, m is a value notified by the downlink control channel, the unit of k and m is a subframe, a short TTI or an SC-FDMA symbol, and n is a natural number.

Optionally, the base station further comprises a fifth configuration module that predefines multiple uplink DMRS patterns, where each DMRS pattern is divided into short TTIs and DMRS locations in one subframe or time slot, or , DMRS includes at least the relative positional relationship between the DMRS and the short TTI, and one of a plurality of predefined uplink DMRS patterns is indicated in the instruction field of the downlink control channel.

As an option, the downlink control channel is a downlink control channel that uses the downlink DCI format, and the second determination module further transmits the DMRS transmission position of the sPUCCH that transmits the ACK / NACK feedback information corresponding to the downlink control channel. Is determined, and information for determining the transmission position of the DMRS is notified to the terminal by the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

As an option, the base station further comprises a sixth setting module, which is transmitted in a subframe of number n or a short TTI and has a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. It is defined in advance that the sPUCCH transmitted in is scheduled, and the DMRS of the sPUCCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or the downlink. The values notified by the control channel, m1 and m2 are the values notified by the downlink control channel, and the units of k, m1 and m2 are subframes, short TTIs or SC-FDMA symbols, or the above. It is defined in advance that the sixth setting module schedules the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format . DMRS is transmitted at a time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined or preset values or values notified by the downlink control channel, where m1 and m2 are described above. It is a value notified by the downlink control channel, the unit of k1, k2, m1, m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the sixth setting module is a number. It is defined in advance that the sPUCCH transmitted in n subframes or short TTIs and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is set to the time region position of n + k + m2. Where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel, k, The unit of m2 is a subframe, short TTI or SC-FDMA symbol, or the sixth setting module is transmitted in the subframe of number n or short TTI, and is n + k1 by a downlink control channel using the downlink DCI format. It is defined in advance that the sPUCCH transmitted in the time region position is scheduled, and the sPUCCH is described. DMRS is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined values, preset values, or values notified by the downlink control channel, and m2 is the downlink control channel. The unit of k1, k2, m2 is a subframe, a short TTI or an SC-FDMA symbol, or the sixth setting module is transmitted in a subframe or a short TTI of number n. , It is defined in advance to schedule the sPUCCH transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format, or the downlink control using the downlink DCI format transmitted in the subframe of the number n or the short TTI. It is defined in advance that the sPUCCH transmitted in the time region position of n + k + m by the channel is scheduled, and the DMRS index position which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission corresponding to the downlink control channel exists. Is indicated by the downlink control channel, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m is notified by the downlink control channel. It is a value, and the unit of k and m is a subframe, a short TTI or an SC-FDMA symbol.

As an option, when multiple terminal TDMs use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit DMRS, of which DMRS in one time slot / subframe. A specific position for transmission is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

One of the above-mentioned technical proposals has an advantage or a beneficial effect of acquiring the position of the DMRS of the uplink transmission via the downlink control channel and determining the insertion position of the DMRS based on the transmission status of the sPUSCH / sPUCCH. Then, the overhead due to DMRS of short TTI transmission is reduced, and the demodulation performance of DMRS is improved.

FIG. 1 is a schematic diagram of the frame structure used by the LTE FDD system. FIG. 2 is a schematic diagram of the frame structure used by the LTE FDD system. FIG. 3 is a flowchart of a method for dynamically determining the transmission position of the uplink DMRS according to the embodiment of the present disclosure. FIG. 4 is a flowchart of a method for dynamically determining the transmission position of the uplink DMRS according to the embodiment of the present disclosure. FIG. 5 is a schematic diagram showing, in the embodiment of the present disclosure, that a base station sequentially schedules sPUSCH transmissions corresponding to two SC-FDMA symbols in one time slot to three terminals. .. FIG. 6 is a schematic diagram of a scheduling method according to an embodiment of the present disclosure. FIG. 7 is a schematic diagram of the DMRS pattern according to the embodiment of the present disclosure. FIG. 8 is a schematic diagram of a DMRS pattern according to an embodiment of the present disclosure. FIG. 9 is a block diagram of the structure of the terminal according to the embodiment of the present disclosure. FIG. 10 is a block diagram of the structure of the base station according to the embodiment of the present disclosure. FIG. 11 is a block diagram of the structure of the terminal according to the embodiment of the present disclosure. FIG. 12 is a block diagram of the structure of the base station according to the embodiment of the present disclosure.

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure is embodied in various forms and is not limited by the embodiments described herein. These embodiments are provided so that the present disclosure is better understood and the scope of the present disclosure is fully communicated to those of skill in the art.

For those of skill in the art, embodiments of the present disclosure can be implemented as systems, devices, devices, methods, or computer program products. Accordingly, embodiments of the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

In the embodiments of the present disclosure, the devices involved include a base station and a terminal, and can perform downlink transmission and uplink reception between the base station and the terminal that has accessed the base station.

The terminal may be referred to as a user device (abbreviated as User Equipment, UE), or may be referred to as a terminal, mobile station (abbreviated as Mobile Station, MS), mobile terminal (Mobile Thermal), or the like. The terminal can communicate with one or more core networks via a radio access network. For example, the terminal may be a mobile phone (also referred to as a "cellular" phone) or a computer with a mobile terminal, for example, the terminal also exchanges voice and / or data with a wireless access network. It may be a portable, pocket, handheld, computer-embedded, or in-vehicle mobile device. Further, the terminal according to the embodiment of the present disclosure may be a device-to-device (abbreviated as Device to Device, D2D) terminal or a machine-to-machine (abbreviated as Machine to Machine, M2M) terminal.

In the embodiment, as shown in FIG. 3, the method of dynamically determining the transmission position of the uplink DMRS specifically includes step 301 in which the terminal receives the downlink control channel and the uplink demodulation reference in which the terminal follows the downlink control channel. Includes step 302 to determine the transmission position of the signal (DMRS).

Optionally, in the present embodiment, the downlink control channel is a downlink control channel that uses the uplink DCI format, and the step 302 in which the terminal determines the transmission position of the uplink demodulation reference signal (DMRS) according to the downlink control channel is the terminal. Includes determining the DMRS transmission position of the shortened physical uplink shared channel (sPUSCH) scheduled by said downlink control channel according to the downlink control channel.

Optionally, in this embodiment, sPUSCH and DMRS use different scheduling sequences.

Optionally, in this embodiment, the method is transmitted in subframes or short TTIs of number n and n + k + m1 (n + k + m1 is K + m1 more than subframes of number n or short TTIs by downlink control channels using the uplink DCI format. It is defined in advance that the sPUSCH transmitted at the time region position (representing a delay by the time region position of the unit) is scheduled, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is. A predefined value, a preset value, or a value notified by the downlink control channel, m1 and m2 are values notified by the downlink control channel, and the unit of k, m1 and m2 is. It is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI, the units of m1, m2 are SC-FDMA symbols, and in another embodiment, k. , The unit of m1 is a subframe or short TTI, and the unit of m2 is an SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe or short TTI of number n and is in uplink DCI format. It is defined in advance that the sPUSCH transmitted in the time region position of n + k1 + m1 is scheduled by the downlink control channel using The value, the preset value, or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the units of k1, k2, m1, and m2 are sub. It is a frame, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or short TTI, the unit of m1, m2 is an SC-FDMA symbol, and in another embodiment, it is a frame, short TTI or SC-FDMA symbol. The unit of k1, k2, m1 is a subframe or short TTI, and the unit of m2 is an SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe or short TTI of number n. It is defined in advance that the sPUSCH transmitted in the time region position of n + k is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. , K, m2 units are subframes, short TTIs or SC-FDMA symbols (in one embodiment, k units are subframes or short TTIs, m2 units are SC-FDMA symbols), n Is a natural number, or it is defined in advance that the sPUSCH is scheduled to be transmitted in the subframe of number n or a short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format. The DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are predetermined values or preset values or values notified by the downlink control channel, and m2 is the downlink control. It is a value notified by the channel, and the unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or short TTI, m2. The unit is SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe of number n or a short TTI, and is transmitted in the time region position of n + k by a downlink control channel using the uplink DCI format. Predefine to schedule a symbol, or schedule a symbol transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k + m by a downlink control channel using the uplink DCI format. The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUSCH transmission scheduled by the downlink control channel exists, where k is predefined. The value, the preset value, or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframe, short TTI or SC. -FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI, the unit of m is an SC-FDMA symbol, another embodiment. In the voice, the units of k and m are both subframes or short TTIs), and n is a natural number.

Here, m1 and m2 need to be notified to DMRS and sPUSCH in advance, set in advance, or notified by a downlink control channel, respectively, and m1 and m2 are in the same unit (for example, in the same unit). Both can be defined in units of SC-FDMA symbols or in different units (eg, m1 in subframe or short TTI, m2 in units of SC-FDMA symbols).

Optionally, in the present embodiment, the method further comprises predefining a plurality of uplink DMRS patterns (patterns), where each DMRS pattern is divided into short TTIs in one subframe or time slot and DMRS. One of a plurality of predefined uplink DMRS patterns, including at least the location position or the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

Optionally, in this embodiment, the downlink control channel is a downlink control channel that uses the downlink DCI format (ie, a DL grant, or a downlink control channel that directs the release of the downlink SPS resource).

In step 302, in which the terminal determines the transmission position of the uplink DMRS according to the downlink control channel, the terminal determines the transmission position of the DMRS of the sPUCCH in which the terminal transmits the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel. Including deciding.

Optionally, in this embodiment, sPUCCH and DMRS use different scheduling sequences.

Optionally, in the present embodiment, the method preliminarily schedules sPUCCH transmitted in subframes number n or short TTI and transmitted in a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. Defined and transmit the DMRS of the sPUCCH at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1. , M2 is a value notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is subframe or short TTI). The units of m1 and m2 are SC-FDMA symbols, and in another embodiment, the units of k and m1 are subframes or short TTIs, and the unit of m2 is SC-FDMA symbols). It is defined in advance that it is a natural number, or that sPUCCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k1 + m1 by a downlink control channel using the downlink DCI format . DMRS is transmitted at a time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined or preset values or values notified by the downlink control channel, where m1 and m2 are. It is a value notified by the downlink control channel, and the unit of k1, k2, m1, m2 is a subframe, a short TTI or an SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or a short). TTI, the unit of m1, m2 is the SC-FDMA symbol, in another embodiment the unit of k1, k2, m1 is the subframe or short TTI, the unit of m2 is the SC-FDMA symbol). , N is a natural number, or it is predefined to schedule the sPUCCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format. , The DMRS of the sPUCCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value, or by the downlink control channel. The unit of k and m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k). Is a subframe or short TTI, and the unit of m2 is SC-FDMA symbol), n is a natural number, or is transmitted in a subframe or short TTI of number n, and downlink control using the downlink DCI format is used. It is defined in advance that the sPUCCH transmitted by the channel at the time region position of n + k1 is scheduled, and the DMRS of the sPUCCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are predefined values or preset. The value given or the value notified by the downlink control channel, m2 is the value notified by the downlink control channel, and the units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols. Yes (in one embodiment, the unit of k1 and k2 is a subframe or short TTI, and the unit of m2 is an SC-FDMA symbol), n is a natural number, or the number n is a subframe or short TTI. Predefined to schedule sPUCCH transmitted in the downlink control channel using downlink DCI format in the time region position of n + k, or transmitted in subframe of number n or short TTI, downlink DCI format. Predefined to schedule sPUCCH transmitted in the time region position of n + k + m by the downlink control channel using, and the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission scheduled by the downlink control channel exists. DMRS index position is indicated by the downlink control channel, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m is the downlink control. It is a value notified by the channel, and the unit of k and m is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI and the unit of m is SC. -It is an FDMA symbol, and in another embodiment, the units of k and m are both subframes or short TTIs), and n is a natural number.

Since M1 and M2 are different, it is necessary to notify sPUCCH and DMRS, respectively, by defining them in advance, setting them in advance, or notifying them by a downlink control channel. As an option, in the present embodiment, when a plurality of terminal time division multiplexing (TDM) uses different uplink short TTI transmissions, the plurality of uplink short TTI transmissions share the same time area position and transmit DMRS. A specific position for transmitting DMRS in one timeslot / subframe, eg, the first symbol in one timeslot / subframe, or another position in one timeslot / subframe is by said downlink control channel. Instructed.

Optionally, in the present embodiment, if the terminal is scheduled for multiple uplink short TTI transmissions in succession, the downlink control channel will cause the terminal to transmit between the scheduled uplink short TTIs. You will be instructed. For example, among the plurality of uplink short TTI transmissions, the plurality of uplink short TTI transmissions share the same time domain position between the i-th uplink short TTI transmission and the i + 1th uplink short TTI transmission to transmit DMRS. And / or both, channel estimation is performed based on the same DMRS.

In the present embodiment, the position of the DMRS for uplink transmission is acquired via the downlink control channel, and the insertion position of DMRS is determined based on the transmission status of sPUSCH / sPUCCH. Then, the overhead of DMRS for short TTI transmission is reduced, and the demodulation performance of DMRS is improved.

In the embodiment, as shown in FIG. 4, the method of dynamically determining the transmission position of the uplink DMRS specifically includes step 401 in which the base station determines the transmission position of the uplink DMRS and the downlink control channel of the base station. Includes step 402 to notify the terminal of information for determining the transmission position of the uplink demodulation reference signal (DMRS) by transmitting.

Optionally, in this embodiment, the downlink control channel is a downlink control channel that uses the uplink DCI format. In step 401, in which the base station determines the transmission position of the uplink DMRS, the base station determines the transmission position of the DMRS of the shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel, and determines the transmission position of the DMRS. Includes notifying the terminal of the information to be used by the downlink control channel.

Optionally, in this embodiment, the sPUSCH and DMRS use different scheduling sequences.

Optionally, in this embodiment, the method is transmitted in subframes or short TTIs of number n and n + k + m1 (n + k + m1 is K + m1 more than subframes of number n or short TTIs by downlink control channels using the uplink DCI format. It is defined in advance that the sPUSCH transmitted at the time region position (representing a delay by the time region position of the unit) is scheduled, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is. A predefined value, a preset value, or a value notified by the downlink control channel, m1 and m2 are values notified by the downlink control channel, and the unit of k, m1 and m2 is. It is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI, the units of m1, m2 are SC-FDMA symbols, and in another embodiment, k. , The unit of m1 is a subframe or short TTI, and the unit of m2 is an SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe or short TTI of number n and is in uplink DCI format. It is defined in advance that the sPUSCH transmitted in the time region position of n + k1 + m1 is scheduled by the downlink control channel using The value, the preset value, or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the units of k1, k2, m1, and m2 are sub. It is a frame, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or short TTI, the unit of m1, m2 is an SC-FDMA symbol, and in another embodiment, it is a frame, short TTI or SC-FDMA symbol. The unit of k1, k2, m1 is a subframe or short TTI, and the unit of m2 is an SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe or short TTI of number n. It is defined in advance that the sPUSCH transmitted in the time region position of n + k is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. , K, m2 units are subframes, short TTIs or SC-FDMA symbols (in one embodiment, k units are subframes or short TTIs, m2 units are SC-FDMA symbols), n Is a natural number, or it is defined in advance that the sPUSCH is scheduled to be transmitted in the subframe of number n or a short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format. The DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are predetermined values or preset values or values notified by the downlink control channel, and m2 is the downlink control. It is a value notified by the channel, and the unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or short TTI, m2. The unit is SC-FDMA symbol), n is a natural number, or it is transmitted in a subframe of number n or a short TTI, and is transmitted in the time region position of n + k by a downlink control channel using the uplink DCI format. Predefine to schedule a symbol, or schedule a symbol transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k + m by a downlink control channel using the uplink DCI format. The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUSCH transmission scheduled by the downlink control channel exists, where k is predefined. The value, the preset value, or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframe, short TTI or SC. -FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI, the unit of m is an SC-FDMA symbol, another embodiment. In the voice, the units of k and m are subframes or short TTIs), including n being a natural number.

Here, m1 and m2 need to be notified to DMRS and sPUSCH in advance, set in advance, or notified by a downlink control channel, respectively, and m1 and m2 are in the same unit (for example, in the same unit). Both can be defined in units of SC-FDMA symbols or in different units (eg, m1 in subframe or short TTI, m2 in units of SC-FDMA symbols).

Optionally, in the present embodiment, the method further comprises predefining a plurality of uplink DMRS patterns (patterns), where each DMRS pattern is divided into short TTIs in one subframe or time slot and DMRS. One of a plurality of predefined uplink DMRS patterns, including at least the location position or the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

Optionally, in this embodiment, the downlink control channel is a downlink control channel that uses the downlink DCI format. In the above (401), in which the base station determines the transmission position of the uplink DMRS, the base station determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel. This includes notifying the terminal of information for determining the transmission position of the DMRS by the downlink control channel.

Optionally, in this embodiment, the sPUCCH and DMRS use different scheduling sequences.

Optionally, in the present embodiment, the method preliminarily schedules sPUCCH transmitted in subframes number n or short TTI and transmitted in a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. Defined and transmit the DMRS of the sPUCCH at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1. , M2 is a value notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, a short TTI or an SC-FDMA symbol (in one embodiment, the unit of k is a subframe or a short). TTI, the unit of m1, m2 is the SC-FDMA symbol, in another embodiment the unit of k, m1 is the subframe or short TTI, the unit of m2 is the SC-FDMA symbol); or , It is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is set to n + k2 + m2 or n + k2 + m1 + m2. However, k1 and k2 are preset values or preset values, or values notified by the downlink control channel, and m1 and m2 are notified by the downlink control channel. The unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2 is a subframe or short TTI, m1. , The unit of m2 is the SC-FDMA symbol, in another embodiment the unit of k1, k2, m1 is the subframe or short TTI and the unit of m2 is the SC-FDMA symbol); or the number n. It is defined in advance that the sPUCCH transmitted in the subframe or short TTI of the above and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is set in the time region position of n + k + m2. Transmit, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is the lower value. It is a value notified by the control channel, and the unit of k and m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is a subframe or short TTI and the unit of m2. Is an SC-FDMA symbol), n is a natural number, or sPUCCH transmitted in a subframe of number n or short TTI and transmitted in the time region position of n + k1 by a downlink control channel using the downlink DCI format. Is scheduled in advance, and DMRS of the sPUCCH is transmitted at a time region position of n + k2 + m2, where k1 and k2 are notified by a predefined value, a preset value, or the downlink control channel. M2 is a value notified by the downlink control channel, and the unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k1, k2). Is a subframe or short TTI, and the unit of m2 is SC-FDMA symbol), n is a natural number, or is transmitted in a subframe or short TTI of number n, and downlink control using the downlink DCI format is used. Predefined to schedule sPUCCH transmitted in the time region position of n + k by the channel, or transmitted in the subframe of number n or short TTI, in the time region position of n + k + m by the downlink control channel using the downlink DCI format. It is defined in advance that the sPUCCH to be transmitted is scheduled, and the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission corresponding to the downlink control channel exists, is indicated by the downlink control channel. However, k is a predefined value, a preset value, or a value notified by the downlink control channel, and m is a value notified by the downlink control channel, and k, m. The unit is a subframe, short TTI or SC-FDMA symbol (in one embodiment, the unit of k is subframe or short TTI, the unit of m is SC-FDMA symbol, and in another embodiment, k. And m units are both subframes or short TTIs), including n being a natural number.

Since M1 and M2 are different, it is necessary to notify sPUCCH and DMRS, respectively, by defining them in advance, setting them in advance, or notifying them by a downlink control channel.

As an option, in the present embodiment, when a plurality of terminal TDMs use different uplink short TTI transmissions, the plurality of uplink short TTI transmissions share the same time area position and transmit the DMRS, of which one time slot / A specific position for transmitting DMRS in a subframe, eg, the first symbol in one timeslot / subframe, or another position in one timeslot / subframe is indicated by the downlink control channel.

Optionally, in the present embodiment, if the terminal is scheduled for multiple uplink short TTI transmissions in succession, the downlink control channel will cause the terminal to transmit between the scheduled uplink short TTIs. You will be instructed. For example, among the plurality of uplink short TTI transmissions, the plurality of uplink short TTI transmissions share the same time domain position between the i-th uplink short TTI transmission and the i + 1th uplink short TTI transmission to transmit DMRS. And / or both, channel estimation is performed based on the same DMRS.

In the present embodiment, the position of the DMRS for uplink transmission is acquired via the downlink control channel, and the insertion position of DMRS is determined based on the transmission status of sPUSCH / sPUCCH. Then, the overhead due to DMRS of short TTI transmission is reduced, and the demodulation performance of DMRS is improved.
In an embodiment, the base station sequentially schedules sPUSCH transmissions corresponding to two SC-FDMA symbols in one time slot to three terminals. As shown in FIG. 5, specifically, as follows:
Base station side:

The base station transmits UL grant 1 in a subframe of number n or a short TTI in order to schedule the sPUSCH to be transmitted by the terminal 1 at the time domain position corresponding to n + k + m1, and the DMRS of the sPUSCH is n + k + m2. Transmitted at the time domain position, where m1 is designated by the first indicator field contained in UL grant 1, m2 is designated by the second indicator field contained in UL grant 1, and k is predefined, eg k. Is in units of the length of the short TTI of sPUSCH, and m1 and m2 are in units of SC-FDMA symbols. That is, for example, in the case of k = 4, m1 = 1, m2 = 0, the length of k = 4 short TTI units and m1 = 1 for the subframe or short TTI (start position) of the number n. The sPUSCH is transmitted at the time region position delayed by the SC-FDMA symbol, that is, the sPUSCH is transmitted from the 8th SC-FDMA symbol from the subframe of the number n or the short TTI, and the subframe or the short TTI of the number n is transmitted. The DMRS is transmitted at a time region position delayed by k = 4 short TTI units and m2 = 0 SC-FDMA symbols, i.e., the subframe number n or the 7th SC- from the short TTI. DMRS is transmitted from the FDMA symbol.

Similarly, the base station transmits UL grant 2 in a subframe of number n or a short TTI in order to schedule the sPUSCH to be transmitted by the terminal 2 at the time domain position corresponding to n + k + m1, and the DMRS of the sPUSCH. Is transmitted at the time domain position of n + k + m2. For example, when specified by UL grant 2 as m1 = 3 and m2 = 0, k = 4 short TTI unit lengths and m1 = 3 SC- for the subframe or short TTI of number n. The sPUSCH is transmitted at a time region position delayed by the FDMA symbol, that is, the sPUSCH is transmitted from the 10th SC-FDMA symbol from the subframe or short TTI of number n, and k is transmitted to the subframe or short TTI of number n. The DMRS is transmitted at a time region position delayed by = 4 short TTI units and m2 = 0 SC-FDMA symbols, that is, the number n subframe or the 7th SC-FDMA symbol from the short TTI. DMRS is transmitted from. Of course, the base station transmits UL grant 2 in subframes of other numbers or short TTIs, and adjusts the values of m1 and m2 to transmit sPUSCH and DMRS by the terminal 2 at the time domain position. Scheduling can be achieved as well.

Similarly, the base station transmits UL grant 3 in a subframe of number n or a short TTI in order to schedule the sPUSCH to be transmitted by the terminal 3 at the time domain position corresponding to n + k + m1, and the DMRS of the sPUSCH. Is transmitted at the time domain position of n + k + m2. For example, when specified by UL grant 3 as m1 = 5 and m2 = 0, k = 4 short TTI unit lengths and m1 = 5 SC- for the subframe or short TTI of number n. The sPUSCH is transmitted at a time region position delayed by the FDMA symbol, that is, the sPUSCH is transmitted from the 12th SC-FDMA symbol from the subframe or short TTI of number n, and k is transmitted to the subframe or short TTI of number n. The DMRS is transmitted at a time region position delayed by = 4 short TTI units and m2 = 0 SC-FDMA symbols, that is, the number n subframe or the 7th SC-FDMA symbol from the short TTI. DMRS is transmitted from. Of course, the base station transmits UL grant 3 in subframes of other numbers or short TTIs, and adjusts the values of m1 and m2 to transmit sPUSCH and DMRS by the terminal 3 at the time domain position. Scheduling can be achieved as well.
Terminal side:

The terminal 1 receives the UL grant1 in the subframe of the number n or the short TTI, transmits the sPUSCH at the time domain position corresponding to n + k + m1, and determines to transmit the DMRS of the sPUSCH at the time domain position of n + k + m2. However, m1 is designated by the first indicator field contained in UL grant1, m2 is designated by the second indicator field included in UL grant1, k is predefined, for example, k is the length of the short TTI of sPUSCH. The unit is m1 and m2, and the unit is the SC-FDMA symbol. For example, when k = 4, m1 = 1, m2 = 0, the terminal 1 has a length of k = 4 short TTI units and m1 = 1 SC-for a subframe or short TTI of number n. The sPUSCH is transmitted at the time region position delayed by the FDMA symbol, that is, the sPUSCH is transmitted from the 8th SC-FDMA symbol from the subframe of the number n or the short TTI, and k for the subframe or the short TTI of the number n. = 4 short TTI unit lengths and m2 = 0 SC-FDMA symbols transmitted DMRS at a delayed time region position, i.e., the number n subframe or the 7th SC-FDMA symbol from the short TTI. DMRS is transmitted from.

Similarly, the terminal 2 receives the UL grant 2 in the subframe of the number n or the short TTI, transmits the sPUSCH at the time domain position corresponding to n + k + m1, and transmits the DMRS of the sPUSCH at the time domain position of n + k + m2. To determine. For example, when instructed by UL grant2 as m1 = 3 and m2 = 0, the terminal 2 has a length of k = 4 short TTI units and m1 = 3 for a subframe or short TTI of number n. The sPUSCH is transmitted at a time region position delayed by the SC-FDMA symbol of, that is, the sPUSCH is transmitted from the 10th SC-FDMA symbol from the subframe or short TTI of number n to the subframe or short TTI of number n. On the other hand, DMRS is transmitted at a time region position delayed by k = 4 short TTI units and m2 = 0 SC-FDMA symbols, that is, the subframe of number n or the 7th SC from the short TTI. -Transmit DMRS from the FDMA symbol. Of course, the terminal 2 receives UL grant 2 in a subframe of another number or a short TTI, and acquires the corresponding values of m1 and m2 to transmit sPUSCH and DMRS in the time domain position. It can be realized in the same way.

Similarly, the terminal 3 receives the UL grant 3 in the subframe of the number n or the short TTI, transmits the sPUSCH at the time domain position corresponding to n + k + m1, and transmits the DMRS of the sPUSCH at the time domain position of n + k + m2. To determine. For example, when instructed by UL grant 3 as m1 = 5 and m2 = 0, the terminal 3 has a length of k = 4 short TTI units and m1 = 5 for a subframe or short TTI of number n. The sPUSCH is transmitted at a time region position delayed by only one SC-FDMA symbol, that is, the sPUSCH is transmitted from the subframe of the number n or the short TTI to the twelfth SC-FDMA symbol, and the subframe or the short TTI of the number n is transmitted. DMRS is transmitted at a time region position delayed by k = 4 short TTI units and m2 = 0 SC-FDMA symbols, ie the 7th subframe or short TTI of number n. DMRS is transmitted from the SC-FDMA symbol. Of course, the terminal 3 transmits UL grant 3 in a subframe of another number or a short TTI, and adjusts the values of m1 and m2 to similarly transmit sPUSCH and DMRS in the time domain position. It can also be realized.

In the embodiment, if the base station determines that a plurality of sPUSCH transmissions are continuously present in a terminal, the base station may also instruct the terminal to transmit DMRS among the plurality of sPUSCH transmissions. For example, as in the scheduling shown in FIG. 6, the scheduling sequences of the sPUSCH and DMRS are the same as described above, and are omitted here.

In the above-described embodiment, the same can be realized when the scheduling sequence is defined as another method, and thus it is omitted here. However, when the transmission timing of DMRS is earlier than sPUSCH, the value of m2 can be a negative value. When replacing all or part of sPUSCH with sPUCCH, the same applies except that the corresponding UL grant is replaced with DL grant, which is omitted here.

In the embodiment, in the standard protocol, two types of DMRS patterns shown in FIGS. 7 and 8 are predefined, and the base station selects one DMRS pattern based on the actual scheduling situation of the time slot at that time. , The terminal can be notified via the downlink control channel. The terminal can determine the DMRS position in one slot according to the DMRS pattern notified by the downlink control channel, and can determine the transmission position of the sPUSCH according to the scheduling sequence.

In the above embodiment, DL sTTI and UL sTTI may use the same frequency resource, that is, TDD system, or different frequency resources may be used, that is, FDD system. Therefore, the methods of the present disclosure also apply to both TDD and FDD systems.

In the embodiment, as shown in FIG. 9, the terminal 900 includes a reception module 901 that receives a downlink control channel and a first determination module 902 that determines a transmission position of an uplink demodulation reference signal (DMRS) according to the downlink control channel. To prepare for.

In this embodiment, optionally, the downlink control channel is a downlink control channel using the uplink DCI format, and the determination module is further DMRS of a shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel. The transmission position of is determined according to the downlink control channel.

In this embodiment, the sPUSCH and DMRS optionally use different scheduling sequences.

In the present embodiment, as an option, the terminal further includes a first setting module, the first setting module being transmitted in a subframe of number n or a short TTI, n + k + m1 by a downlink control channel using the uplink DCI format. It is defined in advance that the sPUSCH transmitted at the time region position of is scheduled, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k includes a predefined value or a preset. The value given or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the unit of k, m1 and m2 is subframe, short TTI or SC-FDMA. It is a symbol, n is a natural number, or the first setting module is transmitted in a subframe of number n or a short TTI, and is transmitted in a time region position of n + k1 + m1 by a downlink control channel using the uplink DCI format. It is defined in advance that the sPUSCH is scheduled, and the DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values, or the downlink control channel. The values notified by, m1 and m2 are the values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, the first setting module schedules sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format. Defined and transmitting the DMRS of the sPUSCH at a time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, where m2 is said. It is a value notified by the downlink control channel, the unit of k and m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the first setting module is a subframe of number n. Alternatively, sPUS transmitted in short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format. It is defined in advance that CH is scheduled, and the DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are notified by a predefined value, a preset value, or the downlink control channel. The value is, m2 is the value notified by the downlink control channel, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, and n is a natural number, or the above. The first setting module predefines to schedule the sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format, or the number n. It is defined in advance that the sPUSCH transmitted in the subframe or short TTI of the above and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.

In the present embodiment, as an option, the terminal further comprises a second setting module that predefines a plurality of uplink DMRS patterns, each DMRS pattern being divided into short TTIs in one subframe or time slot and DMRS. One of a plurality of predefined uplink DMRS patterns, including at least the location position or the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

In the present embodiment, as an option, the downlink control channel is a downlink control channel using the downlink DCI format, and the determination module further transmits ACK / NACK feedback information corresponding to the downlink control channel DMRS of sPUCCH. The transmission position of is determined according to the downlink control channel.

In this embodiment, optionally, sPUCCH and DMRS use different scheduling sequences.

In the present embodiment, as an option, the terminal further includes a third setting module, the third setting module being transmitted in a subframe of number n or a short TTI, n + k + m1 by a downlink control channel using the downlink DCI format. It is defined in advance to schedule the sPUCCH transmitted at the time region position of, and the DMRS of the sPUCCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value or a preset value. , Or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, a short TTI or an SC-FDMA symbol. , N is a natural number, or the third setting module schedules sPUCCH transmitted in a subframe or short TTI of number n and transmitted in a time region position of n + k1 + m1 by a downlink control channel using the downlink DCI format. The sPUCCH DMRS is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are notified by a predefined value or a preset value or the downlink control channel. The values m1 and m2 are the values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Alternatively, it is defined in advance that the third setting module schedules sPUCCH transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k by a downlink control channel using the downlink DCI format. The DMRS of the spUCCH is transmitted at a time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is the downlink control channel. The unit of k, m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the third setting module is a subframe or short TTI of number n. The sPUCCH transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format is scaled. Juring is defined in advance and the DMRS of the sPUCCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are notified by a predefined value or a preset value or the downlink control channel. The value is m2, the value is notified by the downlink control channel, the units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols, and n is a natural number, or the first number. 3 The configuration module predefines to schedule the sPUCCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format, or of number n. It is defined in advance that the sPUCCH transmitted in the subframe or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format is scheduled, and the sPUCCH transmission corresponding to the downlink control channel exists. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot, is indicated by the downlink control channel, where k is a predefined or preset value, or by the downlink control channel. It is a notified value, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.

In the present embodiment, when a plurality of terminal time division multiplexing (TDM) different uplink short TTI transmissions are used as an option, the plurality of uplink short TTI transmissions share the same time domain position and transmit DMRS. A specific position for transmitting DMRS in one time slot / subframe is indicated by the downlink control channel.

In this embodiment, optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel is used to transmit the DMRS among the plurality of uplink short TTIs scheduled by the terminal. You will be instructed.

In the present embodiment, the position of the DMRS for uplink transmission is acquired via the downlink control channel, and the insertion position of DMRS is determined based on the transmission status of sPUSCH / sPUCCH. Then, the overhead due to DMRS of short TTI transmission is reduced, and the demodulation performance of DMRS is improved.

In the embodiment, as shown in FIG. 10, the base station 100 transmits the second determination module 1001 for determining the transmission position of the uplink DMRS and the downlink control channel to determine the transmission position of the uplink DMRS. It is provided with a notification module 1002 for notifying the terminal of the information for the purpose.

In this embodiment, as an option, the downlink control channel is a downlink control channel using the uplink DCI format, and the second determination module is further shortened physical uplink shared channels s (PUSCH) scheduled by the downlink control channel. ), The DMRS transmission position is determined, and the information for determining the DMRS transmission position is notified to the terminal by the downlink control channel.

In this embodiment, the sPUSCH and DMRS optionally use different scheduling sequences.

In the present embodiment, as an option, the base station further includes a fourth setting module, which is transmitted in a subframe of number n or a short TTI by a downlink control channel using the uplink DCI format. It is predefined to schedule the sPUSCH transmitted at the time region position of n + k + m1, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value or preset. The value or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, a short TTI or an SC-FDMA symbol. Yes, n is a natural number, or the sPUSCH the fourth setting module is transmitted in a subframe of number n or a short TTI and is transmitted at a time region position of n + k1 + m1 by a downlink control channel using the uplink DCI format. Scheduling is defined in advance, and the DMRS of the sPUSCH is transmitted at a time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are notified by a predefined value, a preset value, or the downlink control channel. The values m1 and m2 are the values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Or, it is defined in advance that the fourth setting module schedules sPUSCH transmitted in a subframe of number n or a short TTI and transmitted in a time region position of n + k by a downlink control channel using the uplink DCI format. , DMRS of the sPUSCH is transmitted at a time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is the downlink control. It is a value notified by the channel, the unit of k, m2 is a subframe, a short TTI or SC-FDMA symbol, n is a natural number, or the fourth setting module is a subframe or short of number n. The sPUSCH transmitted by TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format. It is defined in advance that queuing is performed, and the DMRS of the sPUSCH is transmitted at the time region position of n + k2 + m2, where k1 and k2 are notified by a predefined value, a preset value, or the downlink control channel. The value is, m2 is the value notified by the downlink control channel, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, and n is a natural number, or the above. The fourth setting module predefines to schedule the sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format, or the number n. It is defined in advance that the sPUSCH transmitted in the subframe or short TTI of the above and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.

In this embodiment, as an option, the base station further comprises a fifth configuration module that predefines a plurality of uplink DMRS patterns, where each DMRS pattern is divided into short TTIs and DMRS in one subframe or time slot. One of a plurality of predefined uplink DMRS patterns, including at least the location of the DMRS or the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.
In the present embodiment, as an option, the downlink control channel is a downlink control channel using the downlink DCI format, and the second determination module further transmits ACK / NACK feedback information corresponding to the downlink control channel. The DMRS transmission position is determined, and the information for determining the DMRS transmission position is notified to the terminal by the downlink control channel.

In this embodiment, the sPUCCH and DMRS optionally use different scheduling sequences.

In the present embodiment, as an option, the base station further includes a sixth setting module, the sixth setting module being transmitted in a subframe of number n or a short TTI by a downlink control channel using the downlink DCI format. It is predefined to schedule the spUCCH transmitted at the time region position of n + k + m1, and the DMRS of the spUCCH is transmitted at the time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value or preset. The value or the value notified by the downlink control channel, m1 and m2 are the values notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, a short TTI or an SC-FDMA symbol. Yes, or predefined that the sixth configuration module schedules sPUCCH transmitted in subframes or short TTIs with number n and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format. Then, the DMRS of the sPUCCH is transmitted at the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predetermined values, preset values, or values notified by the downlink control channel. m1 and m2 are values notified by the downlink control channel, the units of k1, k2, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number or the sixth. It is defined in advance that the setting module schedules the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The unit of k and m2 is a subframe, short TTI or SC-FDMA symbol, which is transmitted in the subframe of number n or short TTI and is transmitted in the downlink control channel using the downlink DCI format at the time region position of n + k1. It is defined in advance that the sPUCCH to be transmitted is scheduled, and the DMRS of the sPUCCH is set to n + k. It is transmitted in the time region position of 2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols, or the sixth setting module is transmitted in subframes or short TTIs of number n, and downlink DCI. Predefined to schedule sPUCCH transmitted in the time region position of n + k by the downlink control channel using the format, or n + k + m by the downlink control channel transmitted in the subframe of number n or short TTI and using the downlink DCI format. It is defined in advance that the sPUCCH transmitted in the time region position of is scheduled, and the DMRS index position which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission corresponding to the downlink control channel exists is the downlink. Instructed by the control channel, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m is a value notified by the downlink control channel. , K, m are subframes, short TTIs or SC-FDMA symbols.

In the present embodiment, as an option, when a plurality of terminal TDMs use different uplink short TTI transmissions, the plurality of uplink short TTI transmissions share the same time domain position and transmit the DMRS, of which one time slot / A specific position for transmitting DMRS in the subframe is indicated by the downlink control channel.

In this embodiment, optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel is used to transmit the DMRS among the plurality of uplink short TTIs scheduled by the terminal. You will be instructed.

In the present embodiment, the position of the DMRS for uplink transmission is acquired via the downlink control channel, and the insertion position of DMRS is determined based on the transmission status of sPUSCH / sPUCCH. Then, the overhead due to DMRS of short TTI transmission is reduced, and the demodulation performance of DMRS is improved.

In the embodiment, as shown in FIG. 11, as another configuration, the embodiment of the present disclosure is the first transceiver 1101 that transmits / receives data under the control of the first processor 1104 and specifically receives the downlink control channel. Provided is a terminal including a first processor 1104 that executes a process of reading a program in the first memory 1105 and determining a transmission position of an uplink demodulation reference signal (DMRS) according to a downlink control channel.

In FIG. 11, the bus architecture (represented as first bus 1100) can include any number of interconnected buses and bridges, the first bus 1100 being one or more represented by the first processor 1104. The processor and various circuits such as a memory represented by the first memory 1105 are connected to each other. As is known in the art, the first bus 1100 can also be connected to various other circuits such as external devices, voltage regulators, and power management circuits, and will not be described further here. The first bus interface 1103 provides an interface between the first bus 1100 and the first transceiver 1101. The first transceiver 1101 can be one or more elements such as, for example, a plurality of receivers and transmitters, which provide means for communicating with various other devices on the transmission medium. The data processed by the first processor 1104 is transmitted via the radio medium by the first transceiver 1101 and the first antenna 1102. Further, the first antenna 1102 receives the data and transmits it to the first process 1104 via the first transceiver 1101.

The first processor 1104 is responsible for the management and normal processing of the first bus 1100 and can also provide various functions including timekeeping, external interface, voltage regulation, power management, and other control functions. The first memory 1105 can be used for data used when the first processor 1104 operates. Specifically, the first processor 1104 may be a CPU, ASIC, FPGA, or CPLD.

Optionally, the downlink control channel is a downlink control channel that uses the uplink DCI format.

Optionally, the first processor 1104 is further configured to determine the DMRS transmission position of the shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel according to the downlink control channel.

Optionally, sPUSCH and DMRS use different scheduling sequences.

Optionally, the first processor 1104 is further predefined to schedule a sPUSCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the uplink DCI format. , DMRS of the sPUSCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1, m2. Is the value notified by the downlink control channel, the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance to schedule the sPUSCH transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however. , K1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel and k1 and k2. , M1 and m2 are units of subframe, short TTI or SC-FDMA symbol, where n is a natural number, or is transmitted in subframe or short TTI of number n and is transmitted by a downlink control channel using the uplink DCI format. It is predefined to schedule the sPUSCH transmitted at the time region position of n + k, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value. Alternatively, it is a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Yes, or pre-defined to schedule the sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined. The value, the preset value, or the value notified by the downlink control channel, m2 is the value notified by the downlink control channel, and the units of k1, k2, and m2 are subframes and short TTIs. Alternatively, it is an SC-FDMA symbol, where n is a natural number, or the sPUSCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in the time region position of n + k by a downlink control channel using the uplink DCI format. The The downlink control channel is configured to indicate the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot where the sPUSCH transmission scheduled by the downlink control channel is present, where k is predefined. A value, a preset value, or a value notified by the downlink control channel, m is a value notified by the downlink control channel, and the units of k and m are subframes, short TTIs, or SCs. -It is an FDMA symbol, and n is a natural number.

Optionally, the first processor 1104 is further configured to predefine a plurality of uplink DMRS patterns, each DMRS pattern being divided into short TTIs and DMRS locations in one subframe or time slot, or One of a plurality of predefined uplink DMRS patterns, including at least the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

Optionally, the downlink control channel is a downlink control channel that uses the downlink DCI format.

As an option, the first processor 1104 is further configured to determine the transmission position of the DMRS of the sPUCCH that transmits the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

Optionally, the first processor 1104 is further predefined to schedule a sPUCCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. , DMRS of the spUCCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1, m2. Is the value notified by the downlink control channel, the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance to schedule the sPUCCH transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however. , K1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel and k1 and k2. , M1 and m2 are units of subframe, short TTI or SC-FDMA symbol, where n is a natural number, or is transmitted in subframe or short TTI of number n and is transmitted by a downlink control channel using the downlink DCI format. It is predefined to schedule the spUCCH transmitted at the time region position of n + k, and the DMRS of the spUCCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value. Alternatively, it is a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Yes, or pre-defined to schedule the sPUCCH transmitted in the number n subframe or short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH . It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined. The value, the preset value, or the value notified by the downlink control channel, m2 is the value notified by the downlink control channel, and the units of k1, k2, and m2 are subframes and short TTIs. Alternatively, it is an SC-FDMA symbol, where n is a natural number, or sPUCCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in the time region position of n + k by a downlink control channel using the downlink DCI format. The The downlink control channel indicates the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission corresponding to the downlink control channel exists, where k is a predefined value or a predetermined value. The set value or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframes, short TTIs or SC-FDMA symbols. , N is a natural number.

Optionally, when multiple terminal time division multiplexing (TDM) use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit the DMRS, of which one time slot / A specific position for transmitting DMRS in the subframe is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

In an embodiment, as shown in FIG. 12, as another configuration, the embodiments of the present disclosure include a second transceiver 1201 that transmits and receives data under the control of a second processor 1204, specifically a downlink control channel. Provides a base station with a second processor 1204 that reads the program in the second memory 1205 and executes the process of determining the transmission position of the uplink DMRS.

In FIG. 12, the bus architecture (represented as the second bus 1200) can include any number of interconnected buses and bridges, the second bus 1200 being one or more represented by the second processor 1204. Various circuits such as a processor of the above and a memory represented by the second memory 1205 are connected to each other. As is known in the art, the second bus 1200 can also be connected to various other circuits such as external devices, voltage regulators, and power management circuits, and will not be described further here. The second bus interface 1203 provides an interface between the second bus 1200 and the second transceiver 1201. The second transceiver 1201 can be one or more elements such as, for example, a plurality of receivers and transmitters, which provide a means for communicating with various other devices on the transmission medium. The data processed by the second processor 1204 is transmitted via the radio medium by the second transceiver 1201 and the second antenna 1202. Further, the second antenna 1202 receives the data and transmits it to the second processor 1204 via the second transceiver 1201.

The second processor 1204 is responsible for the management and normal processing of the second bus 1200 and can also provide various functions including timekeeping, external interface, voltage regulation, power management, and other control functions. The second memory 1205 can be used for data used when the second processor 1204 operates. Specifically, the second processor 1204 may be a CPU, ASIC, FPGA, or CPLD.

Optionally, the downlink control channel is a downlink control channel that uses the uplink DCI format.

As an option, the second processor 1204 further determines the transmission position of the DMRS of the shortened physical uplink shared channel (sPUSCH) scheduled by the downlink control channel, and provides information for determining the transmission position of the DMRS on the downlink control channel. Is configured to notify the terminal.

Optionally, the sPUSCH and DMRS use different scheduling sequences.

Optionally, the second processor 1204 is further predefined to schedule a sPUSCH transmitted in subframes number n or short TTIs and transmitted in a time region position of n + k + m1 by a downlink control channel using the uplink DCI format. , DMRS of the sPUSCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1, m2. Is the value notified by the downlink control channel, the unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, n is a natural number, or the number n is a subframe or short TTI. It is defined in advance to schedule the sPUSCH transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, however. , K1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel and k1 and k2. , M1 and m2 are units of subframe, short TTI or SC-FDMA symbol, where n is a natural number, or is transmitted in subframe or short TTI of number n and is transmitted by a downlink control channel using the uplink DCI format. It is predefined to schedule the sPUSCH transmitted at the time region position of n + k, and the DMRS of the sPUSCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value. Alternatively, it is a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, the units of k and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number. Yes, or pre-defined to schedule the sPUSCH transmitted in the subframe of number n or short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are predefined. The value, the preset value, or the value notified by the downlink control channel, m2 is the value notified by the downlink control channel, and the units of k1, k2, and m2 are subframes and short TTIs. Alternatively, it is an SC-FDMA symbol, where n is a natural number, or the sPUSCH is scheduled to be transmitted in a subframe of number n or a short TTI and transmitted in the time region position of n + k by a downlink control channel using the uplink DCI format. The The downlink control channel is configured to indicate the DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUSCH transmission scheduled by the downlink control channel exists, where k is a predefined value. , Or a preset value, or a value notified by the downlink control channel, m is a value notified by the downlink control channel, and the units of k and m are subframe, short TTI or SC-FDMA. It is a symbol and n is a natural number.

Optionally, the second processor 1204 is further configured to predefine a plurality of uplink DMRS patterns, each DMRS pattern being divided into short TTIs and DMRS locations in one subframe or time slot, or One of a plurality of predefined uplink DMRS patterns, including at least the relative positional relationship between the DMRS and the short TTI, is indicated in the downlink control channel instruction field.

Optionally, the downlink control channel is a downlink control channel that uses the downlink DCI format.

As an option, the second processor 1204 further determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel by the base station, and determines the transmission position of the DMRS. Information is configured to be notified to the terminal by the downlink control channel.

Optionally, the sPUCCH and DMRS use different scheduling sequences.

Optionally, the second processor 1204 is further predefined to schedule a sPUCCH transmitted in a subframe of number n or a short TTI and transmitted at a time region position of n + k + m1 by a downlink control channel using the downlink DCI format. , DMRS of the spUCCH is transmitted at a time region position of n + k + m2 or n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, m1, m2. Is a value notified by the downlink control channel, and the unit of k, m1 and m2 is a subframe, a short TTI or an SC-FDMA symbol, or is transmitted in a subframe or a short TTI of number n and is downlinked. It is defined in advance that the sPUCCH transmitted in the time region position of n + k1 + m1 is scheduled by the downlink control channel using the DCI format, and the DMRS of the sPUCCH is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, except that k1 and k2 are transmitted in advance. A defined value, a preset value, or a value notified by the downlink control channel, where m1 and m2 are values notified by the downlink control channel and are units of k1, k2, m1, and m2. Is a subframe, short TTI or SC-FDMA symbol, where n is a natural number, or is transmitted in a subframe or short TTI of number n, at the time region position of n + k by a downlink control channel using the downlink DCI format. It is defined in advance that the sPUCCH to be transmitted is scheduled, and the DMRS of the sPUCCH is transmitted at the time region position of n + k + m2, where k is a predefined value or a preset value, or by the downlink control channel. It is a notified value, m2 is a value notified by the downlink control channel, the unit of k and m2 is a subframe, a short TTI or an SC-FDMA symbol, n is a natural number, or the number n. It is defined in advance that the sPUCCH transmitted in the subframe or short TTI of the above and transmitted in the time region position of n + k1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is set in the time region position of n + k2 + m2. Transmit, where k1 and k2 are predefined values or preset A fixed value or a value notified by the downlink control channel, m2 is a value notified by the downlink control channel, and the units of k1, k2, and m2 are subframes, short TTIs, or SC-FDMA symbols. Predefined to schedule sPUCCH where n is a natural number or is transmitted in subframes or short TTIs of number n and is transmitted in the time region position of n + k by a downlink control channel using the downlink DCI format. Or, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format is scheduled, and corresponds to the downlink control channel. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot in which the sPUCCH transmission is present, is configured to indicate on the downlink control channel, where k is a predefined value or preset. The value given or the value notified by the downlink control channel, m is the value notified by the downlink control channel, and the units of k and m are subframes, short TTIs or SC-FDMA symbols. n is a natural number.

As an option, when multiple terminal TDMs use different uplink short TTI transmissions, the plurality uplink short TTI transmissions share the same time domain position to transmit DMRS, of which DMRS in one time slot / subframe. A specific position for transmission is indicated by the downlink control channel.

Optionally, if the terminal is scheduled for a plurality of uplink short TTI transmissions in succession, the downlink control channel directs the terminal to transmit between the scheduled uplink short TTIs.

The term "embodiment" or "one embodiment" means that a particular feature, structure or property relating to an embodiment is included in at least one embodiment of the present publication. Therefore, "in the embodiment" or "in one embodiment" appearing in the entire specification does not necessarily refer to the same embodiment. It should be noted that these particular features, structures or properties can be optionally combined into one or more embodiments.

In various embodiments of the present disclosure, the magnitude of the process numbers described above does not imply an order of execution, the order of execution of each process should be determined by its function and internal logic, and the present disclosure. It does not limit the realization of the embodiments.

In addition, the terms "system" and "network" are used interchangeably herein.

The terms "and / or" in the specification are used to describe the relationships of related objects, for example, A and / or B, where A exists independently, A and B exist simultaneously, or. It represents three situations in which B exists independently. In addition, the character "/" generally indicates that the preceding and following related objects are in a "or" relationship.

In the embodiments provided herein, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it is understood that determining B based on A does not mean that B is determined only on the basis of A, but may be determined on the basis of A and / or other information. sea bream.

It should be understood that in embodiments of this application, the disclosed methods and devices may be implemented in other ways. For example, the embodiment of the above device is merely an example. For example, the unit division is only a logical functional division, and in an actual implementation, a plurality of units or components may be combined or integrated into another system. You can also ignore some features or not perform them. Further, the coupling or direct coupling or communication connection shown or discussed herein may be an indirect coupling or communication connection via some interface, device or unit, electrical, mechanical or It may be another method.

Further, each functional unit in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically contained separately, and more than one unit may be one. It may be integrated into one unit. The above integrated unit can be embodied in the form of hardware or in the form of hardware and software functional units.

The integrated unit embodied in the form of the software functional unit can be stored in a computer-readable storage medium. The software function unit described above is stored in a storage medium, and a plurality of instructions for causing a computer device (personal computer, server, network-side device, etc.) to execute a part of the transmission / reception method of various embodiments of the present disclosure. including. The storage medium includes media such as a U disk, a mobile hard disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), a magnetic disk, and an optical disk capable of storing a program code.
The above is a preferred embodiment of the present disclosure, and one of ordinary skill in the art can make some improvements and modifications without departing from the principles of the present disclosure. These improvements and amendments are within the protection of this disclosure.

Claims (8)

It is a method to dynamically determine the transmission position of the upstream DMRS.
When the terminal receives the downlink control channel,
The terminal includes determining the transmission position of the uplink demodulation reference signal DMRS according to the downlink control channel.
The terminal determines the transmission position of the uplink DMRS according to the downlink control channel.
The downlink control channel is a downlink control channel that uses the uplink DCI format.
A method 1 comprising the terminal determining the DMRS transmission position of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel according to the downlink control channel.
The downlink control channel is a downlink control channel that uses the downlink DCI format.
The terminal includes any one of the methods 3 including the method 3 in which the terminal determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel.
The terminal of the above method 1 determines the transmission position of the DMRS of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel according to the downlink control channel.
It is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel. The units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format is scheduled, or the sub of the number n. It is defined in advance that the sPUSCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC- FDMA symbols, and n is a natural number. ,
The terminal of the method 3 determines the transmission position of the DMRS of the sPUCCH that transmits the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel.
It is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k + m2 or It is transmitted in the time region position of n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are notified by the downlink control channel. The unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, or the sub of the number n. There is a sPUCCH transmission corresponding to the downlink control channel, which is defined in advance to schedule the sPUCCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot to be used, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control channel. Is a value notified by, m is a value notified by the downlink control channel, units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
A method characterized by that. In the method according to claim 1,
When multiple terminals use different uplink short TTI transmissions in time division multiplex TDM, multiple uplink short TTI transmissions share the same time domain position and transmit DMRS, of which DMRS in one time slot / subframe. A specific position for transmission is indicated by the downlink control channel and / or
When a terminal is scheduled for a plurality of uplink short TTI transmissions in succession, DMRS is instructed by the downlink control channel to transmit between the plurality of uplink short TTIs scheduled by the terminal. Method. It is a method for dynamically determining the transmission position of the upstream DMRS.
The base station determines the transmission position of the uplink DMRS,
The base station includes transmitting a downlink control channel to notify the terminal of information for determining the transmission position of the uplink demodulation reference signal DMRS.
It is not possible for the base station to determine the transmission position of the uplink DMRS.
The downlink control channel is a downlink control channel that uses the uplink DCI format.
The base station determines the DMRS transmission position of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel, and notifies the terminal of information for determining the DMRS transmission position by the downlink control channel. Method 1 including
The downlink control channel is a downlink control channel that uses the downlink DCI format.
The base station determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel, and notifies the terminal of the information for determining the transmission position of the DMRS by the downlink control channel. Including one of the methods 3 and method 3 including
The base station of the method 1 determines the DMRS transmission position of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel, and the downlink control channel provides information for determining the DMRS transmission position. Notifying is
It is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel. The units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format is scheduled, or the sub of the number n. It is defined in advance that the sPUSCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC- FDMA symbols, and n is a natural number. ,
The base station of the method 3 determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel, and the information for determining the transmission position of the DMRS is the downlink control channel. Notifying the terminal by
It is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k + m2 or It is transmitted in the time region position of n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are notified by the downlink control channel. The unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k2 + m2. In the time region position of, where k1 and k2 are predefined or preset values or values notified by the downlink control channel and m2 is notified by the downlink control channel. It is a value, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, or the sub of the number n. There is a sPUCCH transmission corresponding to the downlink control channel, which is defined in advance to schedule the sPUCCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot to be used, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control channel. Is a value notified by, m is a value notified by the downlink control channel, units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
A method characterized by that. In the method according to claim 3 ,
When multiple terminals use different uplink short TTI transmissions in TDM, multiple uplink short TTI transmissions share the same time domain position to transmit DMRS, of which DMRS is transmitted in one time slot / subframe. A specific position for is indicated by the downlink control channel and / or
When a terminal is scheduled for a plurality of uplink short TTI transmissions in succession, DMRS is instructed by the downlink control channel to transmit between the plurality of uplink short TTIs scheduled by the terminal. Method. Equipped with memory, transceiver, processor,
The transceiver is configured to send and receive data under the control of the processor.
The processor reads the program in memory and executes the following process:
Receive downlink control channel;
The transmission position of the uplink demodulation reference signal DMRS is determined according to the downlink control channel.
The processor reads the program stored in memory and
The downlink control channel is a downlink control channel that uses the uplink DCI format.
Method 1 comprising the terminal determining the DMRS transmission position of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel according to the downlink control channel.
The downlink control channel is a downlink control channel that uses the downlink DCI format.
The terminal executes one of the methods 3 including determining the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel. ,
The terminal of the method 1 determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel .
It is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel. The units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format is scheduled, or the sub of the number n. It is defined in advance that the sPUSCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC- FDMA symbols, and n is a natural number. ,
The terminal of the above method 3 determines the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel according to the downlink control channel.
It is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k + m2 or It is transmitted in the time region position of n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are notified by the downlink control channel. The unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, or the sub of the number n. There is a sPUCCH transmission corresponding to the downlink control channel, which is defined in advance to schedule the sPUCCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot to be used, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control channel. Is a value notified by, m is a value notified by the downlink control channel, units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
A terminal characterized by that. Equipped with memory, transceiver, processor,
The transceiver is configured to send and receive data under the control of the processor.
The processor reads the program in memory and executes the following process:
Determines the transmission position of the uplink demodulation reference signal DMRS;
The processor reads the program stored in the memory to transmit the downlink control channel and notify the terminal of the information for determining the transmission position of the uplink DMRS.
The downlink control channel is a downlink control channel that uses the uplink DCI format.
A method 1 comprising determining the DMRS transmission position of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel and notifying the terminal of information for determining the DMRS transmission position by the downlink control channel. ,
The downlink control channel is a downlink control channel that uses the downlink DCI format.
A method including determining the transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel, and notifying the terminal of the information for determining the transmission position of the DMRS by the downlink control channel. Execute one of the methods 3 and 3 and
The transmission position of the DMRS of the shortened physical uplink shared channel sPUSCH scheduled by the downlink control channel of the method 1 is determined, and the information for determining the transmission position of the DMRS is notified to the terminal by the downlink control channel. ,
It is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the uplink DCI format, and the DMRS of the sPUSCH is set to n + k + m2. It is transmitted at the time region position, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are values notified by the downlink control channel. The units of k, m1 and m2 are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 by the downlink control channel using the uplink DCI format is scheduled, and the DMRS of the sPUSCH is defined. It is transmitted in the time region position of n + k2 + m2, where k1 and k2 are preset values or preset values or values notified by the downlink control channel, and m2 is notified by the downlink control channel. The unit of k1, k2, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUSCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k by the downlink control channel using the uplink DCI format is scheduled, or the sub of the number n. It is defined in advance that the sPUSCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the uplink DCI format is scheduled, and the sPUSCH transmission scheduled by the downlink control channel is performed. The DMRS index position, which is the number of the SC-FDMA symbol in an existing subframe or time slot, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control. It is a value notified by the channel, m is a value notified by the downlink control channel, the units of k and m are subframes, short TTI or SC- FDMA symbols, and n is a natural number. ,
The transmission position of the DMRS of the sPUCCH for transmitting the ACK / NACK feedback information corresponding to the downlink control channel of the method 3 is determined, and the information for determining the transmission position of the DMRS is notified to the terminal by the downlink control channel. That is
It is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k + m1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k + m2 or It is transmitted in the time region position of n + k + m1 + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m1 and m2 are notified by the downlink control channel. The unit of k, m1 and m2 is a subframe, short TTI or SC-FDMA symbol.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 + m1 by the downlink control channel using the downlink DCI format is scheduled, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k2 + m2 or n + k2 + m1 + m2, where k1 and k2 are predefined values or preset values or values notified by the downlink control channel, and m1 and m2 are the downlink control. The value notified by the channel, the unit of k1, k2, m1, m2 is a subframe, short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is defined. It is transmitted in the time region position of n + k + m2, where k is a predefined value, a preset value, or a value notified by the downlink control channel, and m2 is a value notified by the downlink control channel. The units of k and m2 are subframes, short TTIs or SC-FDMA symbols, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k1 is scheduled by the downlink control channel using the downlink DCI format, and the DMRS of the sPUCCH is set to n + k2 + m2. In the time region position of, where k1 and k2 are predefined or preset values or values notified by the downlink control channel and m2 is notified by the downlink control channel. It is a value, the unit of k1, k2, m2 is a subframe, a short TTI or SC-FDMA symbol, and n is a natural number.
Alternatively, it is defined in advance that the sPUCCH transmitted in the subframe of the number n or the short TTI and transmitted in the time region position of n + k is scheduled by the downlink control channel using the downlink DCI format, or the sub of the number n. There is a sPUCCH transmission corresponding to the downlink control channel, which is defined in advance to schedule the sPUCCH transmitted in the frame or short TTI and transmitted in the time region position of n + k + m by the downlink control channel using the downlink DCI format. The DMRS index position, which is the number of the SC-FDMA symbol in the subframe or time slot to be used, is indicated by the downlink control channel, where k is a predefined value, a preset value, or the downlink control channel. Is a value notified by, m is a value notified by the downlink control channel, units of k and m are subframes, short TTI or SC-FDMA symbols, and n is a natural number.
A base station characterized by that. In the terminal according to claim 5 ,
When multiple terminals use different uplink short TTI transmissions in time division multiplex TDM, multiple uplink short TTI transmissions share the same time domain position and transmit DMRS, of which DMRS in one time slot / subframe. A specific position for transmission is indicated by the downlink control channel and / or
When a terminal is scheduled for a plurality of uplink short TTI transmissions in succession, DMRS is instructed by the downlink control channel to transmit between the plurality of uplink short TTIs scheduled by the terminal. Terminal. In the base station according to claim 6 ,
When multiple terminals use different uplink short TTI transmissions in TDM, multiple uplink short TTI transmissions share the same time domain position to transmit DMRS, of which DMRS is transmitted in one time slot / subframe. A specific position for is indicated by the downlink control channel and / or
When a terminal is scheduled for a plurality of uplink short TTI transmissions in succession, DMRS is instructed by the downlink control channel to transmit between the plurality of uplink short TTIs scheduled by the terminal. base station.