WO2017045571A1

WO2017045571A1 - Reference signal transmission method and device, receiving method and device

Info

Publication number: WO2017045571A1
Application number: PCT/CN2016/098604
Authority: WO
Inventors: 张雯; 夏树强; 戴博; 徐俊; 石靖; 陈宪明; 刘锟
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-17
Filing date: 2016-09-09
Publication date: 2017-03-23

Abstract

The invention provides a reference signal transmission method and device, and a receiving method and device. The reference signal transmission method comprises: transmitting, by a base station, using a first time-frequency resource, via N antenna ports, a first reference signal, wherein the first time-frequency resource is predefined and/ or allocated by the base station, and N is a positive integer. The invention can resolve a problem in which an allocation scheme of a cell reference signal is unable to satisfy different UE requirements in the prior art.

Description

Reference signal transmitting method and device, receiving method and device

Technical field

The present invention relates to the field of communications, and in particular to a method and device for transmitting a reference signal, and a receiving method and apparatus.

Background technique

Machine Type Communication (MTC) User Equipment (UE), also known as Machine to Machine (M2M) user communication equipment, is the main application form of the Internet of Things. Several techniques for cellular level Internet of Things (C-IOT) are disclosed in the 3GPP Technical Report TR45.820V200, with NB-LTE technology being the most compelling. The system bandwidth of the system is 200 kHz, which is the same as the channel bandwidth of the Global System for Mobile Communication (GSM). This is because the NB-LTE system reuses the GSM spectrum and reduces the mutual interference between the adjacent and GSM channels. Great convenience. The transmission bandwidth and the downlink subcarrier spacing of the NB-LTE are 180 kHz and 15 kHz, respectively, which are the same as the bandwidth and subcarrier spacing of one physical resource block (PRB) of the LTE system. In the NB-LTE system, one M-subframe consists of 6 subframes, and a total of 6 PRBs are included.

How to configure and transmit the cell reference signal (Cell Reference Signal for short) is one of the problems to be solved in NB-LTE. The function of the CRS is mainly for measurement and demodulation of the UE. For NB-LTE, the UE is usually indoor and static. Therefore, for a normally covered UE, the time domain density of the CRS may not be as dense as the Long Term Evolution (LTE) system in the related art, and the CRS is reduced. By transmitting resources, the power consumption of the base station eNB and the interference of the adjacent interval can be saved to some extent. In the NB-LTE system, there may be a large number of UEs that need coverage enhancement, and the CRS is required to improve the demodulation performance.

For the configuration scheme of the cell reference signal in the related art, it is difficult to meet the problem of different UE requirements, and there is currently no effective solution.

Summary of the invention

The embodiments of the present invention provide a method and a device for transmitting a reference signal, and a method and a device for receiving the same, so as to solve at least the problem that the configuration scheme of the cell reference signal in the related art is difficult to meet the requirements of different UEs.

According to an aspect of the embodiments of the present invention, a method for transmitting a reference signal includes: transmitting, by a base station, a first reference signal by using N antenna ports on a first time-frequency resource, where the first time-frequency resource is predefined And/or configured by the base station, where N is a positive integer.

Optionally, the manner of determining the first time-frequency resource includes one of the following: the predefined first time-frequency resource is determined by at least one of: a time domain resource according to all or part of the public message And determining the first time-frequency resource by using a frequency domain resource, where the public message includes: a primary information block MIB, a system information block SIB, a paging message, and a scheduling The downlink control information of the paging message, the RAR, and the downlink control information for scheduling the RAR; determining the first time-frequency resource according to the cell identifier of the cell where the base station is located; the first time-frequency resource is The base station is configured by: the base station notifying the first time-frequency resource in an MIB and/or an SIB; a part of the first time-frequency resource is determined by the predefined manner, and the rest is determined by the base station The way the configuration is determined.

Optionally, the manner of determining the first time-frequency resource according to the time domain resource and/or the frequency domain resource where all or part of the public message is located includes: an antenna of the first reference signal corresponding to all or part of the public message The pattern corresponding to the port and/or the antenna port is determined by the type of all or part of the public message.

Optionally, the antenna port of the first reference signal and/or the corresponding pattern of the antenna port are predefined or configured by the base station.

Optionally, when the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is configured by the base station, the antenna port including the reference signal in the MIB and/or the SIB and/or Or the pattern information corresponding to the antenna port.

Optionally, the method further includes: the base station sending the second reference signal by using the second time-frequency resource.

Optionally, the subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, a subframe in which a primary synchronization signal PSS/secondary synchronization signal SSS is located, and a multicast/multicast single frequency Network MBSFN subframe.

Optionally, in the standalone operating standalone scenario, the corresponding symbol of the second time-frequency resource on the subframe is one or more symbols in the first four symbols of the subframe.

Optionally, on the subframe, the symbol corresponding to the second time-frequency resource is one or more symbols in the following symbols: a first symbol in each slot of the subframe, and a second The symbol and the third symbol of the last digit; the first four symbols of the subframe.

Optionally, on the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or an even index in the MBSFN area. symbol.

Optionally, the sending, by the base station, the second reference signal by using the second time-frequency resource, the base station sending, by using the second time-frequency resource, the part of the N antenna ports Second reference signal.

Optionally, the second time-frequency resource and the first time-frequency resource do not overlap.

Optionally, the second time-frequency resource is determined according to at least one of the following: the base station sends a time domain resource and/or a frequency domain resource of the downlink signal to the designated terminal; and the base station sends the physical downlink to the first terminal. The time domain resource and/or the frequency domain resource of the shared channel PDSCH; the base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.

Optionally, the method further includes: determining, by the at least one of the following, the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, and scheduling the PDSCH. Downlink control information, the type of the designated terminal or the first terminal or the second terminal, or a transmission mode.

Optionally, the downlink control information for scheduling the PDSCH includes: the downlink control information DCI is included in the And transmitting indication information of the second reference signal on a time domain resource and/or a frequency domain resource of the PDSCH.

Optionally, the antenna port of the second reference signal and/or the corresponding pattern of the antenna port are preset or configured by the base station.

Optionally, the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port is determined by: the antenna port of the second reference signal and/or the corresponding pattern of the antenna port is configured by Determining: the type or transmission mode of the designated terminal or the first terminal or the second terminal; the number of repetitions of the PDSCH; the number of repetitions of the downlink control information; The format of the downlink control information; the preamble transmitted when the terminal randomly accesses.

Optionally, before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, The method further includes: the base station transmitting DCI or first high layer signaling to the designated terminal or the first terminal or the second terminal, where the DCI or the first high layer signaling carries an indication The terminal sends the time domain resource of the downlink signal and/or the indication information of the second reference signal on the frequency domain resource.

Optionally, the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of: notifying in the SIB, in the first high layer signaling, or in the DCI. And notifying, in the second high layer signaling, the notification in the random access response RAR received when the designated terminal or the first terminal or the second terminal randomly accesses.

Optionally, the resource location corresponding to the second time-frequency resource is an RE in a plurality of resource unit RE sets S, and the RE in the set S includes: a first one, a second one in each time slot The frequency domain interval on the third last symbol is 4 REs of 2 REs, and the starting RE position of the 4 REs is determined by the base station cell identifier; when the cyclic prefix CP of the symbol is a normal CP, each The 3rd, 4th, 6th, and 7th symbols in the time slots are the 1st, 2nd, 6th, 7th, 11th, and 12th REs; When the cyclic prefix of the symbol is an extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the second on the last two symbols in the odd time slot 3, 6th, 9th, 12th RE; wherein the symbols are sorted in chronological order starting from 1, and the REs in the set S are sorted from 1 in order of frequency from lowest to highest.

According to another aspect of the present invention, a method for receiving a reference signal includes: receiving, by a terminal, a first reference signal sent by a base station through N antenna ports on a first time-frequency resource, the first time-frequency The resources are pre-defined and/or base station configured, where N is a positive integer.

Optionally, the manner of determining the first time-frequency resource includes one of the following: the predefined first time-frequency resource is determined by at least one of: a time domain resource according to all or part of the public message And determining, by the frequency domain resource, the first time-frequency resource, where the public message includes: a primary information block MIB, a system information block SIB, a paging message, downlink control information for scheduling the paging message, RAR, scheduling Downlink control information of the RAR; determining the first time-frequency resource according to a cell identifier of a cell where the base station is located; the first time-frequency resource is configured by the base station by: the base station at the MIB and/ Or the first time-frequency resource is notified in the SIB; a part of the first time-frequency resource is determined by the predefined manner, and the remaining part is determined by a manner configured by the base station.

Optionally, the method further includes: receiving, by the terminal, a second reference signal that is sent by the base station by using a second time-frequency resource.

Optionally, the sending, by the base station, the second reference signal by using the second time-frequency resource includes: the terminal receiving, by the base station, the second time-frequency resource on some or all of the N antenna ports Transmitting the second reference signal.

Optionally, the scheduling the downlink control information of the PDSCH includes: the downlink control information DCI includes indication information for transmitting the second reference signal on a time domain resource and/or a frequency domain resource that sends the PDSCH .

Optionally, the antenna port of the second reference signal and/or the corresponding pattern of the antenna port are preset or Base station configured.

Optionally, before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, the method further The base station sends DCI or first high layer signaling to the designated terminal or the first terminal or the second terminal, where the DCI or the first high layer signaling carries an indication in the The terminal sends the time domain resource of the downlink signal and/or the indication information of the second reference signal on the frequency domain resource.

Optionally, the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of: notifying in the SIB, in the first high layer signaling, or in the DCI. And notifying, in the second high-level signaling, the notification in the random access response RAR received by the designated terminal or receiving the first terminal or the second terminal during random access.

According to still another aspect of the present invention, a device for transmitting a reference signal is provided, which is applied to a base station side, and includes: a first sending module, configured to send a first reference by using N antenna ports on a first time-frequency resource. Signal, the first time-frequency resource is predefined and/or configured by a base station, where N is a positive integer.

Optionally, the manner of determining the first time-frequency resource according to the time domain resource and/or the frequency domain resource where all or part of the public message is located includes: an antenna of the first reference signal corresponding to all or part of the public message Port and/or the antenna end The pattern corresponding to the port is determined by the type of all or part of the public message.

Optionally, the device further includes: a second sending module, configured to send the second reference signal by using the second time-frequency resource.

Optionally, the method further includes: determining, by the at least one of the following, the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, and scheduling the PDSCH. Downlink control information; the type or transmission mode of the designated terminal or the first terminal or the second terminal.

Optionally, the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port is determined by: the antenna port of the second reference signal and/or the corresponding pattern of the antenna port is configured by Determining, by the base station, at least one of: a type or a transmission mode of the designated terminal and the first terminal or the second terminal; the PDSCH The number of repetitions; the number of repetitions of the downlink control information; the format of the downlink control information; and the preamble transmitted when the terminal randomly accesses.

Optionally, before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, the device further The base station sends DCI or first high layer signaling to the designated terminal or the first terminal or the second terminal, where the DCI or the first high layer signaling carries an indication in the The terminal sends the time domain resource of the downlink signal and/or the indication information of the second reference signal on the frequency domain resource.

Optionally, the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of: notifying in the SIB, in the first high layer signaling, or the DCI The medium notification, the notification in the second high layer signaling, the random access response RAR or the message notification received when the designated terminal or the first terminal or the second terminal randomly accesses.

According to still another aspect of the embodiments of the present invention, a receiving apparatus for a reference signal is provided, which is applied to a terminal side, and includes: a first receiving module, configured to receive, by a base station, a N antenna port by using a N antenna port. a first reference signal, the first time-frequency resource being pre-defined and/or configured by a base station, where N is a positive integer.

Optionally, when the antenna port of the first reference signal and/or the corresponding pattern of the antenna port is configured by the base station, the antenna port including the reference signal in the MIB and/or the SIB and/or Pattern information corresponding to the antenna port.

Optionally, the device further includes: the base station sending the second reference signal by using the second time-frequency resource.

Optionally, the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port is determined by: the antenna port of the second reference signal and/or the corresponding pattern of the antenna port is configured by Determining, by the base station, the type or transmission mode of the designated terminal and the first terminal or the second terminal; the number of repetitions of the PDSCH; the number of repetitions of the downlink control information; The format of the downlink control information; the preamble transmitted when the terminal randomly accesses.

Optionally, before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, the device further The third receiving module is configured to receive the DCI or the first high layer signaling sent by the base station, where the DCI or the first high layer signaling carries a time domain resource indicating that the terminal sends a downlink signal. And/or indication information that the second reference signal is transmitted on the frequency domain resource.

Embodiments of the present invention also provide a storage medium. Optionally, in this embodiment, the foregoing storage medium may be configured to store program code for performing the following steps: sending the first through the N antenna ports on the first time-frequency resource configured by the predefined and/or the base station. Reference signal, where N is a positive integer.

Embodiments of the present invention also provide a storage medium. Optionally, in this embodiment, the foregoing storage medium may be configured to store program code for: receiving, by the base station, a first reference signal sent by the N antenna ports on the first time-frequency resource, where The first time-frequency resource is pre-defined and/or base station configured, where N is a positive integer.

According to the embodiment of the present invention, the base station sends the first reference signal through the N antenna ports on the first time-frequency resource configured by the base station and/or the base station, where the N is a positive integer, that is, by predefined and/or The first time-frequency resource configured by the base station and the first reference signal are sent on the N antenna ports, so that the manner of transmitting the reference signal is more abundant, and the problem that the configuration scheme of the cell reference signal in the related art is difficult to meet the requirements of different UEs is solved.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method of transmitting a reference signal according to an embodiment of the present invention;

2 is a flowchart of a method of receiving a reference signal according to an embodiment of the present invention;

3 is a block diagram showing the structure of a transmitting apparatus of a reference signal according to an embodiment of the present invention;

4 is a block diagram 1 of an optional structure of a transmitting device for a reference signal according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a receiving apparatus for a reference signal according to an embodiment of the present invention; FIG.

6 is a block diagram 1 of an optional structure of a receiving device for a reference signal according to an embodiment of the present invention;

7 is a schematic diagram of two symbols in a time domain and a density increase in a frequency domain according to an alternative embodiment of the present invention;

8a-8c are schematic diagrams of CRSs transmitting antenna port 0 on 2 symbols or 1 symbol according to this alternative embodiment;

9 is a first schematic diagram of an RE set S according to an alternative embodiment of the present invention;

FIG. 10 is a schematic diagram of transmitting a first reference signal and a second reference signal according to an alternative embodiment of the present invention; FIG.

11 is a first schematic diagram of a RE set S1 for a normal CP according to an alternative embodiment of the present invention;

FIG. 12 is a second schematic diagram of a RE set S1 for a normal CP according to an alternative embodiment of the present invention; FIG.

FIG. 13 is an optional schematic diagram 2 of an RE set S according to an alternative embodiment of the present invention; FIG.

14 is a schematic diagram of a pilot transmitted on a subframe in which an MIB or a PSS/SSS is located, according to an alternative embodiment of the present invention;

15 is a schematic diagram of pilot transmission on an MBSFN subframe in accordance with an alternate embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for transmitting a reference signal is provided. FIG. 1 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102: The base station sends a first reference signal on the first time-frequency resource through the N antenna ports, where the first time-frequency resource is configured by a predefined and/or a base station, and N is a positive integer.

In this embodiment, the base station sends the first reference signal through the N antenna ports on the first time-frequency resource configured by the predefined and/or the base station, where the N is a positive integer, that is, through a predefined and/or base station. The first time-frequency resource is configured and the first reference signal is sent on the N antenna ports, so that the method for transmitting the reference signal is more abundant, and the problem that the configuration scheme of the cell reference signal in the related art is difficult to meet the requirements of different UEs is solved.

Based on the first time-frequency resource involved in the foregoing embodiment, the manner of determining the first time-frequency resource includes one of the following:

Manner 1: The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to the time domain resource and/or the frequency domain resource where all or part of the public message is located, where the public message includes: Main information block MIB, System information block SIB, paging message, downlink control information for scheduling paging message, RAR, downlink control information for scheduling RAR; determining first time-frequency resource according to the cell identifier of the cell where the base station is located;

Manner 2: The first time-frequency resource is configured by the base station by: the base station notifying the first time-frequency resource in the MIB and/or the SIB;

Manner 3: A part of the first time-frequency resource is determined in a predefined manner, and the remaining part is determined by the manner in which the base station is configured.

The method for determining the first time-frequency resource according to the time domain resource and/or the frequency domain resource in which all or part of the public message is located in the foregoing mode 1 may be implemented in the following manner in the optional implementation manner of the embodiment: The pattern corresponding to the antenna port and/or antenna port of the first reference signal corresponding to all or part of the public message is determined by the type of all or part of the public message.

It should be noted that the pattern corresponding to the antenna port and/or the antenna port of the first reference signal involved in this embodiment is predefined or configured by a base station. Wherein, when the pattern corresponding to the antenna port and/or the antenna port of the first reference signal is configured by the base station, the pattern information corresponding to the antenna port and/or the antenna port including the reference signal in the MIB and/or the SIB is included.

In another optional embodiment of this embodiment, the method in this embodiment may further include: the base station transmitting the second reference signal by using the second time-frequency resource.

It should be noted that, in an optional implementation manner of this embodiment, the subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, a primary synchronization signal PSS/secondary synchronization signal SSS Subframe, multicast/multicast single frequency network MBSFN subframe. In the standalone scenario, the corresponding symbol of the second time-frequency resource on the subframe is one or more symbols in the first four symbols of the subframe.

Optionally, on the subframe, the symbol corresponding to the second time-frequency resource is one or more symbols in the following symbols: the first symbol, the second symbol, and the last number in each slot of the subframe. Three symbols; the first four symbols of the sub-frame.

Optionally, on the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or a symbol of an even index in the MBSFN area.

The method may be implemented in the following manner: on some or all of the N antenna ports, the base station sends the second reference signal by using the second time-frequency resource.

It should be noted that the second time-frequency resource and the first time-frequency resource involved in this embodiment do not overlap.

In addition, the second time-frequency resource is determined according to at least one of the following: the base station sends the time domain resource and/or the frequency domain resource of the downlink signal to the designated terminal; and the base station sends the time domain resource of the physical downlink shared channel PDSCH to the first terminal. And/or a frequency domain resource; the base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.

The second time-frequency resource is further determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, the downlink control information for scheduling the PDSCH, and the designated terminal/first terminal/second terminal Type or transfer mode.

The downlink control information of the scheduled PDSCH includes: the downlink control information DCI includes indication information for transmitting a second reference signal on a time domain resource and/or a frequency domain resource for transmitting the PDSCH.

The pattern corresponding to the antenna port and/or the antenna port of the second reference signal involved in this embodiment may also be preset or configured by the base station.

The preset pattern corresponding to the antenna port and/or the antenna port of the second reference signal may be determined by: determining, by the base station, the corresponding pattern of the antenna port and/or the antenna port of the second reference signal according to at least one of the following: The type of the first terminal UE/the second terminal UE or the transmission mode; the number of repetitions of the PDSCH; the number of repetitions of the downlink control information; the format of the downlink control information; and the preamble transmitted when the terminal randomly accesses.

Before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, the method further includes: the base station to the designated terminal and And/or the first terminal and/or the second terminal sends the DCI or the first high layer signaling, where the DCI or the first high layer signaling carries a time domain resource and/or a frequency domain resource that is sent on the terminal to send the downlink signal. The indication information of the second reference signal.

The pattern corresponding to the antenna port and/or the antenna port of the second reference signal is configured by at least one of: notifying in the SIB, notifying in the first high layer signaling or in the DCI, notifying in the second higher layer signaling And receiving the random access response RAR or the notification in the message when the designated terminal or the first terminal or the second terminal randomly accesses.

In addition, the resource location corresponding to the second time-frequency resource is an RE in the multiple resource unit RE set S, and the RE in the set S includes:

The frequency domain interval on the 1st, 2nd, and 3rd last symbols in each slot is 4 REs of 2 REs, and the starting RE positions of 4 REs are determined by the base station cell identifier;

When the cyclic prefix CP of the symbol is a normal CP, the first, second, sixth, and seventh symbols on the third, fourth, sixth, and seventh symbols in each slot are , the 11th and 12th RE;

The cyclic prefix of the symbol is the extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the third on the last two symbols in the odd time slot. , the sixth, the ninth, the twelfth RE;

Among them, the symbols are sorted in order from chronological order, and the REs in the set S are sorted from 1 in order from the lowest frequency to the highest frequency.

In practical applications, the available REs of the CRS are not limited to the foregoing RE locations, and for example, pilot encryption may also be performed on other REs.

2 is a flowchart of a method for receiving a reference signal according to an embodiment of the present invention. As shown in FIG. 2, the steps of the method include:

Step S202: The terminal receives the first reference signal sent by the base station on the first time-frequency resource through the N antenna ports, where the first time-frequency resource is predefined and/or configured by the base station, where N is a positive integer.

Manner 1: The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to the time domain resource and/or the frequency domain resource where all or part of the public message is located, where the public message includes: a primary information block MIB, a system information block SIB, a paging message, a downlink control information for scheduling a paging message, a RAR, and downlink control information for scheduling a RAR; and determining a first time-frequency resource according to a cell identifier of a cell in which the base station is located;

The method of this embodiment further includes: the terminal receiving the second reference signal sent by the base station by using the second time-frequency resource.

The step of the method may be implemented by: the terminal receiving a second reference signal sent by the base station by using the second time-frequency resource on some or all of the N antenna ports.

The second time-frequency resource is further determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, the downlink control information for scheduling the PDSCH, the designated terminal/first terminal/the first Second end The type of the end or the mode of transmission.

The preset pattern corresponding to the antenna port and/or the antenna port of the second reference signal may be determined by: determining, by the base station, the corresponding pattern of the antenna port and/or the antenna port of the second reference signal according to at least one of the following: Or the type or transmission mode of the first terminal or the second terminal; the number of repetitions of the PDSCH; the number of repetitions of the downlink control information; the format of the downlink control information; and the preamble transmitted when the terminal randomly accesses.

Before the base station sends the downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or before the base station sends the downlink control information to the second terminal, the method in this embodiment further includes: Transmitting DCI or first high layer signaling to the designated terminal and/or the first terminal and/or the second terminal, where the DCI or the first high layer signaling carries a time domain resource and/or a frequency domain indicating that the downlink signal is sent by the terminal. The indication information of the second reference signal is sent on the resource.

The pattern corresponding to the antenna port and/or the antenna port of the second reference signal is configured by at least one of: notifying in the SIB, notifying in the first high layer signaling or in the DCI, notifying in the second higher layer signaling And receiving the random access response RAR or the notification in the message when the designated terminal or the terminal that receives the second reference signal randomly accesses.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

A device for transmitting a reference signal is also provided in the embodiment, and the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 3 is a structural block diagram of a device for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 3, the device is applied to a base station side, and the device includes: a first sending module 32, configured to pass N on the first time-frequency resource. The antenna ports transmit a first reference signal, and the first time-frequency resource is pre-defined and/or configured by the base station, where N is a positive integer.

4 is a block diagram of an optional structure of a device for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 4, the device further includes: a second sending module 42 coupled to the first sending module 32 and configured to pass The second time-frequency resource transmits a second reference signal.

The second time-frequency resource is further determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, the downlink control information for scheduling the PDSCH, the designated terminal/first terminal/the first The type or transmission mode of the second terminal.

FIG. 5 is a structural block diagram of a receiving apparatus for a reference signal according to an embodiment of the present invention. The apparatus is applied to a terminal side. As shown in FIG. 5, the apparatus includes: a first receiving module 52 configured to receive a base station at a first time frequency. The first reference signal sent by the N antenna ports on the resource, where the first time-frequency resource is predefined and/or configured by the base station, where N is a positive integer.

FIG. 6 is a block diagram of an optional structure of a receiving device for a reference signal according to an embodiment of the present invention. As shown in FIG. 6, the device includes a second receiving module 62 coupled to the first receiving module 52 and configured to receive a base station. a second reference signal transmitted by the second time-frequency resource.

The invention is exemplified below in conjunction with an alternative embodiment of the invention;

Alternative embodiment 1

In this optional embodiment, a method for transmitting a reference signal is provided, where the reference signal is sent through N antenna ports, where the N is greater than or equal to 1; in addition, the reference signal is only in a public message or a partial public message. Corresponding time domain resources and/or transmissions in frequency domain resources. The public message includes at least one of the following: an MIB, an SIB, a paging message, downlink control information for scheduling a paging message, RAR, and downlink control information for scheduling the RAR.

In the following, the CRS is taken as an example. It should be noted that the optional embodiment is not limited to the CRS in practical applications.

Example 1:

The CRS is transmitted only in the subframe in which the MIB is transmitted, and is not transmitted in other subframes. In the subframe in which the CRS is transmitted, the CRS is transmitted in full bandwidth. Or, further, the CRS is sent only on the frequency domain resource that sends the MIB. For example, in the existing LTE system, the MIB is sent only in the center 6 PRBs, and then the CRS is sent only on the 6 PRBs where the MIB is located. The subframe involved in the first embodiment may be an LTE subframe in the related art, or may be an M-subframe in a narrowband LTE system, where each M-subframe is composed of 6 consecutive subframes, M-subframe, the CRS may be sent in all subframes of the M-subframe, or may be sent in a partial subframe, and the frequency domain is filled with one PRB; wherein the CRS may be used for MIB demodulation, or may be used. Measurement by the UE; the UE performs measurement on the subframe or M-subframe in which the MIB is located.

For example, in narrowband LTE, the MIB is transmitted every 10 M-subframes, and when the M-subframe of the MIB is transmitted and the entire M-subframe is occupied for transmission, the CRS is transmitted on the M-subframe of the transmitting MIB.

The pattern corresponding to the antenna port and/or antenna port of the CRS may be preset or notified by the eNB. Here, the corresponding pattern of the sending port refers to the RE position occupied by the transmitting antenna port in one scheduling unit. For example, FIG. 7 is a schematic diagram showing an increase in density in a frequency domain and a density in a frequency domain according to an alternative embodiment of the present invention. The RE position in a PRB marked in FIG. 7 is the pattern of the antenna port 0. . The pattern corresponding to the antenna port and/or the antenna port of the CRS may be preset. For example, the antenna port of the CRS is preset to be a port, and the pattern is also preset. Alternatively, the pattern corresponding to the antenna port and/or the antenna port of the CRS may also be notified by the eNB, such as adding a different scrambling code to the CRC of the MIB to indicate the number of antenna ports of the CRS, or notifying in the SIB.

It should be noted that the transmission manner in this alternative embodiment is not limited to the LTE system and the narrowband LTE system.

Example two:

The CRS is transmitted only in the subframe in which the MIB and the SIB are transmitted, and is not transmitted in other subframes; wherein the CRS can be used for demodulation of the MIB and the SIB, and can also be used for measurement by the UE. The UE performs measurement on a subframe or an M-subframe in which the MIB/SIB is located. Or, further, the CRS is only sent on the frequency domain resources that send the MIB and the SIB, and is sent in the MIB and the SIB. The CRS is not sent on the PRB other than the MIB and the SIB.

The pattern corresponding to the antenna port and/or antenna port of the CRS may be preset or notified by the eNB.

Example three:

The CRS is only sent in the subframes and/or the frequency domain resources of the downlink control information of the MIB, the SIB, the paging message, the scheduling paging message, the RAR, the downlink control information of the scheduling RAR, and the CRS can be used for the solution of the foregoing information. Tuning can also be used for UE measurements. For example, the transmitting subframe and the PRB of the MIB and the SIB are fixed, and the UE can perform measurements on the subframes.

Further, the transmit antenna port of the first reference signal on the first time-frequency resource and/or the pattern corresponding to the antenna port are determined by the message type of all or part of the public message. For example, the antenna ports sent in the MIB and the SIB are

antenna ports

0 and 1, and in other subframes, such as paging messages, downlink control information for scheduling paging messages, RAR, and downlink control information for scheduling RAR, The transmitted antenna ports are 0, 1, 2, and 3.

Alternative embodiment 2:

In the optional embodiment 2, the subframe in which the CRS is partially transmitted is predefined, and the subframe in which the CRS is partially transmitted is configured. For example, the CRS is sent in the MIB and all the SIBs or part of the SIBs, for example, only in the SIB-1. send. Which subframes in other subframes send CRS notifications in the SIB, for example, in SIB-1, the notification signaling may be a bitmap, such as a bitmap of all M-subframes on an M frame. "1" in the Bitmap corresponds to the M-subframe in which the CRS is transmitted.

The pattern corresponding to the antenna port and/or antenna port of the CRS may be preset or notified by the eNB. Further, the MIB and/or the SIB may include pattern information corresponding to the antenna port and/or the antenna port. For example, the SIB-1 includes 4-bit information indicating which of the 0, 1, 2, and 3 antenna ports of the configured CRS.

Further, the patterns corresponding to the antenna ports and/or antenna ports of the predefined CRS and the configured CRS may be the same, different, or partially identical. For example, the antenna ports of the CRSs sent in the MIB and all SIBs or part of the SIBs are 0 and 1, and the antenna ports of the CRSs transmitted in the configured CRS subframes are 0, 1, 2, 3, or in the configured CRS subframes. The antenna ports of the CRS transmitted in are 2 and 3. The pattern corresponding to the antenna port may also be different. For example, for the antenna port 0, the pattern corresponding to the configured antenna port includes the number of REs that exceed the number of REs included in the predefined CRS.

Different cells may adopt different CRS configurations to avoid interference of the neighboring cell CRS on the PDSCH of the cell edge UE. The CRS configuration information may be exchanged between the eNBs, for example, the eNB exchanges CRS configuration information of the local cell through the X2 interface.

Alternative embodiment three:

In the optional third embodiment, the subframe for transmitting the CRS may be predefined, for example, pre-defined to send CRS on M-subframes with indexes of 0, 4, 5, and 9, and on other M-subframes. Do not send.

Further, the subframe in which the CRS of one cell is transmitted may also be determined by the cell identifier. For example, the index is 0, 4, 5, The M-subframes of 9 are renumbered to 0, 1, 2, and 3, and the M-subframes of the CRSs transmitted by each cell correspond to the renumbered indexes.

Further, a subframe in which a CRS of a cell is transmitted may be partially defined, and a part is determined according to a cell identifier. For example, in a narrowband LTE system, an M-subframe with an index of 0 for each cell must transmit a CRS. The index of another M-subframe transmitting the CRS is determined by the cell identifier, for example, the index of another M-subframe transmitting the CRS is

Alternative embodiment four:

In the fourth embodiment, in the narrowband LTE, a CRS configuration method is provided, and the method proposed in this alternative embodiment can also be applied to other systems.

The UEs in the narrowband LTE system are indoor stationary UEs, so it is considered to reduce the time domain density of the CRS and increase the resources for PDSCH transmission.

For the M-subframe to which the CRS is transmitted, for example, the M-subframe for transmitting the CRS determined according to the methods of the foregoing optional embodiments 1 to 3, the CRS is transmitted on each subframe included in the M-subframe, and the sub-frame is transmitted on each subframe. The density of the CRS in the time domain is reduced compared to existing LTE systems. For example, in an LTE system, there are 4 symbols on a subframe with a CRS of antenna port 0. In a narrowband LTE system, CRS can be transmitted only on 3 or 2 or 1 symbol. 8a-8c are schematic diagrams of transmitting CRS of antenna port 0 on 2 symbols or 1 symbol according to this alternative embodiment. For FIG. 8c, CRS is only transmitted in the area of the PDCCH, and the PDCCH may be demodulated by CRS. Other signals can be demodulated by DMRS. For public messages, the precoding matrix of the DMRS can be preset.

Further, in order to ensure the demodulation performance of the UE, the frequency domain density of the CRS can be increased. Preferably, the RE of the existing multiple antenna ports can be used for one antenna port to transmit the CRS. For example, both the antenna port 0 in LTE and the RE of the CRS of antenna port 1 are used to transmit the CRS of antenna port 0, and the CRS has only one antenna port 0. As shown in FIG. 7, the density of the reference signal in the frequency domain is twice that of the existing LTE system, and the reference signal sequence can be defined by:

among them

For the community identity,

The number of maximum PRBs included in the downlink;

Alternative embodiment five:

In the optional embodiment 5, in the narrowband LTE, a CRS configuration method is provided, and it should be noted that The method proposed in the alternative embodiment can also be applied to other systems.

The UEs in the narrowband LTE system are indoor still UEs. Therefore, it is considered to reduce the time domain density of the CRS and increase the resources for PDSCH transmission.

For an M-subframe that transmits a CRS, the M-subframe contains a CRS on a partial subframe, and there is no CRS on a partial subframe. In an M-subframe, only a partial subframe transmits a CRS, for example, an M-subframe. In the middle, only the subframes 0, 2, and 4 transmit the CRS. The CRS on each subframe may be an existing CRS design, or may be a newly designed CRS, for example, a configuration scheme of a CRS in a subframe in the optional fourth embodiment.

Alternative Embodiment 6:

For UEs that need coverage enhancement, such as sensors close to the basement, the coverage is often poor, and the signals sent to the UE often require a large amount of repetition to meet the BLER requirements. One way to reduce the number of repetitions is to increase the density of the reference signal, and if the density of the CRS is increased for individual coverage-enhanced UEs in the system, it can be very wasteful for the entire system. Therefore, in this embodiment, a manner of transmitting a CRS is given.

In this alternative embodiment, the transmission of the CRS is divided into two parts, a first reference signal and a second reference signal. The time-frequency resource for transmitting the first reference signal is referred to as a first time-frequency resource, and the first time-frequency resource is pre-defined or semi-statically configured, and the first reference signal is transmitted through N antenna ports. For example, the method is sent according to the foregoing embodiment, for example, on the M-subframe where the MIB is located, and only the antenna port 0 is sent on the M-subframe where the MIB is located, and only the two symbols are sent in the time domain; Or transmitting according to the prior art similar to LTE, such as transmitting on the M-subframe of the non-MBSFN, and sending the CRS according to the prior art on all subframes on each M-subframe. The time-frequency resource for transmitting the second reference signal is the second time-frequency resource.

The antenna port of the second reference signal may be completely different from the antenna port of the first reference signal, or may be partially the same. For example, the transmit antenna port of the first reference signal is 0, 1, and the antenna port that transmits the second reference signal is 2, 3.

Further, the antenna port of the second reference signal may be part or all of the antenna ports of the first reference signal, that is, on one or more antenna ports of the N antenna ports, sending Two reference signals. One or more antenna ports of the N antenna ports are preset or notified by the eNB.

The second time-frequency resource is determined by the base station transmitting the time domain resource and/or the frequency domain resource of the downlink signal to the designated terminal. For example, the second reference signal is transmitted on the time domain resource of the downlink signal sent by the designated terminal, or only on the time-frequency resource that the designated terminal sends the downlink signal, for example, the designated terminal is in subframe #3. When the PRB #3 to 7 are transmitted, the second reference signal is transmitted only on the PRBs #3 to 7 of the subframe #3. Here, the terminal is specified as a terminal of a specified type, such as a low-cost terminal, or a terminal that needs to be covered with enhanced coverage; or the designated terminal is a terminal in a specified transmission mode, such as a terminal in the coverage enhanced mode, or a large coverage enhanced mode. Terminal, or terminal in high speed mode, etc. In practical applications, it is not limited to the above examples. Alternatively, the designated terminal may also be a terminal that has received the eNB notification, for example, the eNB notifies the UE that the eNB may send the second reference signal on the time domain resource and/or the frequency domain resource where the downlink signal of the UE is located. For example, for a UE in the coverage enhancement mode, in the subframe in which it is transmitted, in addition to transmitting the CRS on the first time-frequency resource, it is also in the second The CRS is sent on the time-frequency resource. Assuming that the CRS on the first time-frequency resource has N (≥1) antenna ports, all or part of the antenna ports of the N antenna ports are on the second time-frequency resource in the subframe covered by the enhanced coverage UE. Send CRS on. In this way, on the transmission subframe of the UE in the coverage enhancement mode, the density of the reference signal of some or all of the CRS antenna ports is increased, and the demodulation performance of the UE under coverage enhancement is improved. In practical applications, it is not limited to the UE in the coverage enhanced mode. Further, the second time-frequency resource and the first time-frequency resource do not overlap.

Further, before transmitting the second reference signal on the transmission subframe of the coverage enhanced UE (the UE in the coverage enhancement mode is not limited to the actual application), the eNB may notify the eNB to use the second time-frequency resource by using the high layer signaling or the DCI. Send a reference signal on. For example, in the SIB, the UE is notified that it will send a signal on the second time-frequency resource in the subframe where the downlink signal of the enhanced UE is located, so that the coverage enhanced UE receives the first time-frequency resource and the second when receiving the signal. Reference signal on time-frequency resources. For example, in the SIB, the information is sent by the 1 bit signaling. The “1” indicates that the eNB sends the reference signal on the second time-frequency resource in the subframe that sends the downlink signal to the coverage enhanced UE. The “0” indicates that the eNB does not provide coverage. The subframe in which the enhanced downlink signal is transmitted by the UE transmits the reference signal on the second time-frequency resource. Alternatively, the eNB may also notify a certain UE in the RRC signaling that it will send the reference signal on the second time-frequency resource in the subframe where the downlink signal of the UE is located.

Alternatively, the second time-frequency resource may also be determined by the PDSCH transmitted to the UE (hereinafter referred to as the first UE). Further, the second time-frequency resource is determined according to the number of repetitions of the PDSCH. For example, when the number of repetitions of the PDSCH exceeds a preset/configuration threshold, the eNB sends the first time in the time-frequency resource where the PDSCH is located. Two reference signals. Alternatively, the downlink control information DCI for scheduling the PDSCH includes indication information that the eNB transmits the reference signal on the second time-frequency resource in the subframe where the PDSCH of the UE is located. Or, the second time-frequency resource is determined according to the type/transmission mode of the UE, and the type/transmission mode of the UE is defined as described above. For example, for the UE in the coverage enhanced mode, the eNB is at the time when the PDSCH is located. The second reference signal is sent in the frequency resource. Further, before transmitting the second reference signal on the transmission subframe of the PDSCH of the UE, the eNB may notify the eNB to send the reference signal on the second time-frequency resource by using the high layer signaling or the DCI.

Alternatively, the second time-frequency resource may also be determined by downlink control information sent to the UE (hereinafter referred to as the second UE). Further, the second time-frequency resource is determined according to the number of repetitions of the downlink control information. For example, when the number of repetitions of the downlink control information exceeds a preset/configured threshold, the eNB is located at the downlink control information. The second reference signal is sent in the time-frequency resource. Or determining, according to the format of the downlink control information, for example, when the number of bits included in the downlink control information exceeds a preset/configuration threshold, the eNB sends the first time in the time-frequency resource where the downlink control information is located. Two reference signals. Or, the second time-frequency resource is determined according to the type/transmission mode of the UE, and the type/transmission mode of the UE is defined as described above. For example, for the UE in the coverage enhanced mode, the eNB is located in the downlink control information. The second reference signal is sent in the time-frequency resource. Further, before the second reference signal is sent on the transmission subframe of the downlink control information of the UE, the eNB may notify the eNB to send the reference signal on the second time-frequency resource by using the high layer signaling or the DCI.

The pattern corresponding to the antenna port and/or the antenna port of the second reference signal may be preset. For example, the base station determines the antenna port of the second reference signal according to the type of the designated terminal/the first UE/the second UE. / or the corresponding pattern of the antenna port. For example, if the designated terminal is a terminal under coverage enhancement, the eNB transmits the CRS by using a pattern corresponding to the antenna port and/or the antenna port corresponding to the coverage enhancement. Or according to the weight of the PDSCH or the downlink control information sent to the UE The number of repetitions is determined, for example, the greater the number of repetitions, the denser the pilot, that is, the greater the number of REs for the second reference signal in each scheduling unit. Or determining, according to the format of the downlink control information sent by the UE, for example, the more the number of bits included in the downlink control information, the denser the pilot. Or determining according to a preamble sent when the terminal randomly accesses. Each preamble may correspond to a pattern corresponding to an antenna port and/or an antenna port of the second reference signal.

The pattern corresponding to the antenna port and/or the antenna port of the second reference signal may also be configured, such as in the SIB, or in the first high layer signaling indicating that the eNB will send the reference signal on the second time-frequency resource. Or notify in the DCI, or in another high-level signaling different from the first higher layer signaling. Alternatively, it may also be notified in the RAR or the message four received when the UE randomly accesses.

Optionally, to ensure compatibility, the second time-frequency resource location may be selected from the locations of the CRSs in the related art, that is, the second time-frequency resource location may be a subset of the following RE sets S: The frequency domain interval on the 1st, 2nd, and 3rd symbols in the time slots is 4 REs of 2 REs, and the starting RE position of the RE is determined by the cell identity. Starting position is

REs, in which symbols are sorted in order from chronological order, and REs are sorted from 1 in order of frequency from lowest to highest. FIG. 9 is a first schematic diagram of an RE set S according to an alternative embodiment of the present invention. As shown in FIG. 9, the REs in the RERE set corresponding to the grid lines.

For example, FIG. 10 is a schematic diagram of transmitting a first reference signal and a second reference signal according to an alternative embodiment of the present invention. As shown in FIG. 10, an M-subframe includes 6 subframes, and each subframe includes a PRB. On each subframe of each M-subframe, in the prior art, the CRS is transmitted on the RE corresponding to the antenna port 0, and the antenna port is 0. In the subframe that covers the enhanced UE transmission, in the prior art, the antenna port 0 The CRS is transmitted on the antenna port 0 at the RE position corresponding to 1.

Or, in each subframe of each M-subframe, transmit CRS on antenna port 0 and antenna port 1 in the prior art, and REs corresponding to antenna ports 0 and 2 in the subframe covered by the enhanced UE. The CRS is transmitted on the antenna port 0 at the position, and the CRS is transmitted on the antenna port 1 at the RE positions corresponding to the antenna ports 1 and 3.

Further, for the coverage enhanced UE, in order to further increase the density of the CRS and ensure compatibility, the second time-frequency resource may be a subset of the RE set S1 in which the existing DMRS is located, that is, on the RE where the existing DMRS is located. The CRS is transmitted on all or part of the antenna ports of the N antenna ports. The set of REs where the existing DMRS is located is:

In the normal CP, the 3rd, 4th, 6th, and 7th symbols in each slot are the 1st, 2nd, 6th, 7th, 11th, and 11th. 12 REs.

When the CP is extended, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the third and sixth on the last two symbols in the odd time slot , the ninth, the twelfth RE.

Among them, the symbols are sorted from 1 in chronological order, and the REs are sorted from 1 in order of frequency from lowest to highest.

FIG. 11 is a first schematic diagram of a RE set S1 for a normal CP according to an alternative embodiment of the present invention. As shown in FIG. 11, the REs in the RERE set S1 corresponding to the grid lines. FIG. 12 is a second schematic diagram of a RE set S1 for a normal CP according to an alternative embodiment of the present invention. As shown in FIG. 12, the REs in the RERE set S1 corresponding to the grid lines.

FIG. 13 is an optional schematic diagram 2 of an RE set S according to an optional embodiment of the present invention. As shown in FIG. 13, on each subframe of each M-subframe, a location corresponding to antenna port 0 sends a CRS. Covering the subframe transmitted by the enhanced UE, the CRS is transmitted on the antenna port 0 at the RE position corresponding to the uplink channel quality measurement DMRS.

Before transmitting the second reference signal on the transmission subframe of the coverage enhanced UE (the UE is not limited to the coverage enhancement mode in the actual application), the eNB may notify the eNB to send the reference signal on the second time-frequency resource by using the high layer signaling. Further, the high layer signaling further includes antenna port information of the second reference signal. For example, if the first reference signal has four transmit antenna ports, namely

antenna ports

0, 1, 2, and 3, the eNB will use a 4-bit bitmap to notify the antenna port of the second reference signal in the high layer signaling, for example, "1100" indicates that the transmit antenna port of the second reference signal is the antenna port 0 and the antenna port 1. On the transmission subframe of the coverage enhanced UE (not limited to the UE in the coverage enhancement mode in the actual application), the antenna port corresponds to the second The pattern corresponding to the reference signal transmitting antenna port may be preset. Alternatively, the pattern corresponding to the second reference signal sending port corresponding to the antenna port may also be notified in the high layer signaling, for example, a plurality of patterns are predefined, and the eNB notifies the index of the pattern.

The second reference signal may also be sent in the PDSCH, and the downlink control information DCI of the scheduling PDSCH includes indication information that the eNB transmits the reference signal on the time-frequency resource where the PDSCH of the UE is located. Further, the DCI further includes antenna port information of the second reference signal, which is similar to the foregoing notification manner. On the subframe sent by the PDSCH, the pattern corresponding to the antenna port may be preset, or may be notified in the DCI. Similar to the above notification method.

In order to meet the requirements of different UEs in the system, the patterns of the reference signals corresponding to the ports and/or ports of the second reference signal may be different for different UEs. For example, for the coverage enhanced UE and the high speed UE, different ports and patterns of the second reference signal are used. For example, the pattern of the antenna port of the high speed UE needs to be encrypted in the frequency domain with respect to the coverage enhanced UE.

The eNB determines a port and/or a pattern to transmit the second reference signal according to the state in which the UE is located.

Alternative Embodiment 7:

This embodiment provides a method for transmitting a pilot. Existing CRSs can be encrypted. The pilot is transmitted on at least one of the following subframes: a transmission subframe of the MIB, a transmission subframe of the PSS/SSS, and an MBSFN subframe.

The pilot is transmitted on all remaining REs or partial REs on the subframe in which the MIB or PSS/SSS is located. 14 is a schematic diagram of a pilot transmitted on a subframe in which an MIB or a PSS/SSS is located according to an alternative embodiment of the present invention. In FIG. 14, a grid-shaped RE is an RE that transmits a CRS, and a dot-shaped RE is the Pilot. As shown in FIG. 14, the number of CRS antenna ports is 4, and the SSS is transmitted on a symbol without a CRS, and the pilot is transmitted on the remaining REs on the symbol where the CRS other than the PDCCH region is located, that is, the frequency domain of the CRS is performed. encryption. That is, for a normal CP, the pilot is transmitted in one or more of the first symbol, the second symbol, and the third to last symbol of each slot in the subframe. On the symbol, the number of REs occupied by the pilot is one of 2, 4, and 8. Figure 14 shows the case where the number of occupied REs is 8. Alternatively, time domain encryption may be performed in one subframe. For example, if the transmit antenna port of the CRS is 0 and 1, the CRSs with

antenna ports

0 and 1 may be transmitted on the REs corresponding to antenna ports 2 and 3. Time domain encryption is performed on the CRS to increase the demodulation performance under coverage enhancement. Alternatively, the above two methods can be combined, and both the time domain and the frequency domain are encrypted. In addition, the pilots may also be transmitted with REs on other symbols than the SSS, such as the 3rd and 4th symbols in FIG. Since the SSS is the last 9 symbols, the REs on the 3rd and 4th are the remaining REs, and the REs can also be used to transmit the pilots to increase the density.

For an MBSFN subframe, the MBSFN area of the MBSFN subframe has no CRS, and the CRS may be transmitted in the MBSFN area, that is, the CRS is time-domain encrypted. For example, the pilot may be transmitted on all symbols of the MBSFN area, or the pilot may be sent every other symbol, such as on the symbol of the even index, or on the symbol of the odd index, the index of the symbol is one. All symbols in a sub-frame are indexed from zero in chronological order. Here, the MBSFN area is a part other than the area occupied by the PDCCH on the MBSFN subframe, for example, the first two symbols are PDCCH areas, and then the MBSFN area is all REs on the following symbols. FIG. 15 is a schematic diagram of a pilot transmitted on an MBSFN subframe according to an alternative embodiment of the present invention. As shown in FIG. 15 , an MBSFN subframe is shown. The PDCCH region is two symbols, and the following symbols are MBSFN regions. The number of transmit antenna ports of the CRS is 2, and the pilot is transmitted in the MBSFN area of the MBSFN subframe, and is transmitted by one symbol.

Optionally, for the independent operation of the standalone scenario, the system may not send the PDCCH, and then the PDCCH region may be used to send the pilot, that is, all or part of the symbols in the first four symbols, and the corresponding symbol index is 0, 1. 2, 3, here all the symbols of a sub-frame are sorted from zero in chronological order. The pilot may be transmitted on all REs of the PDCCH region, or may be transmitted only on part of the RE.

In the above scenario, the antenna port for transmitting the pilot may be the same as the CRS sent by the system, or may be a partial port of the CRS. For example, the transmit antenna port of the CRS is 0, 1, 2, and 3, and the pilot transmit antenna port is 0 and 1. Alternatively, it may be more than the transmit antenna port of the CRS. For example, the transmit antenna port of the CRS is 0 and 1, and the transmit antenna port of the pilot is 0, 1, 2, and 3.

The acquisition of the pilot pattern may be preset or configured by the eNB, and the configured signaling is similar to other embodiments.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. The base station sends the first reference signal through the N antenna ports on the first time-frequency resource configured by the predefined and/or the base station, where N is a positive integer.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and is to those skilled in the art. Many variations and modifications of the invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the embodiment of the present invention, in the process of the method for transmitting the reference signal, the base station sends the first reference signal through the N antenna ports on the first time-frequency resource configured by the predefined and/or the base station, where the N is A positive integer, that is, a first time-frequency resource configured by a predefined and/or a base station, and the first reference signal is sent at the N antenna ports, so that the manner of transmitting the reference signal is more abundant, and the configuration scheme of the cell reference signal in the related art is solved. It is difficult to meet the needs of different UE needs.

Claims

A method for transmitting a reference signal, comprising:

The base station sends a first reference signal on the first time-frequency resource through the N antenna ports, where the first time-frequency resource is predefined and/or configured by the base station, where N is a positive integer.
The method of claim 1, wherein the manner of determining the first time-frequency resource comprises one of the following:

The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource where all or part of the public message is located, where the public time The message includes: a primary information block MIB, a system information block SIB, a paging message, downlink control information for scheduling the paging message, RAR, and downlink control information for scheduling the RAR; and determining according to a cell identifier of a cell in which the base station is located The first time-frequency resource;

The first time-frequency resource is configured by the base station by: the base station notifying the first time-frequency resource in an MIB and/or an SIB;

A portion of the first time-frequency resource is determined by the predefined manner, and the remaining portion is determined by the manner in which the base station is configured.
The method of claim 2, wherein the determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource in which all or part of the public message is located includes:

The antenna port of the first reference signal corresponding to all or part of the public message and/or the pattern corresponding to the antenna port is determined by the type of all or part of the public message.
The method according to claim 1 or 2, wherein the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is predefined or configured by the base station.
The method according to claim 2 or 4, wherein when the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is configured by the base station, the method includes: including in the MIB and/or the SIB The antenna port of the reference signal and/or the pattern information corresponding to the antenna port.
The method of claim 1 wherein the method further comprises:

The base station sends a second reference signal by using a second time-frequency resource.
The method of claim 6 wherein

The subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, a subframe in which the primary synchronization signal PSS/secondary synchronization signal SSS is located, and a multicast/multicast single-frequency network MBSFN subframe.
The method of claim 7 wherein

In the standalone scenario of the independent operation, the symbol corresponding to the second time-frequency resource on the corresponding subframe is one or more symbols in the first four symbols of the subframe.
The method of claim 7 wherein

On the subframe, the second time-frequency resource is one or more symbols in the corresponding symbol:

a first symbol, a second symbol, and a third symbol in the last of each slot of the subframe;

The first four symbols of the subframe.
The method of claim 7 wherein

On the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or a symbol of an even index in the MBSFN area.
The method according to claim 6, wherein the transmitting, by the base station, the second reference signal by using the second time-frequency resource comprises:

And transmitting, by the base station, the second reference signal by using the second time-frequency resource on some or all of the N antenna ports.
The method of claim 6, wherein the second time-frequency resource and the first time-frequency resource do not overlap.
The method according to claim 6 or 11, wherein the second time-frequency resource is determined according to at least one of the following:

Transmitting, by the base station, a time domain resource and/or a frequency domain resource of the downlink signal to the designated terminal;

Transmitting, by the base station, time domain resources and/or frequency domain resources of the physical downlink shared channel PDSCH to the first terminal;

The base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.
The method of claim 13 further comprising:

The second time-frequency resource is determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, downlink control information for scheduling the PDSCH, and the designation. The type or transmission mode of the terminal or the first terminal or the second terminal.
The method of claim 14, wherein the scheduling downlink control information of the PDSCH comprises:

The downlink control information DCI includes indication information for transmitting the second reference signal on a time domain resource and/or a frequency domain resource that sends the PDSCH.
The method according to any one of claims 6 to 15, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port is preset or configured by the base station.
The method according to claim 13 or 16, wherein the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port are determined by:

The antenna port of the second reference signal and/or the pattern corresponding to the antenna port is determined by the base station according to at least one of: the type or transmission of the designated terminal or the first terminal or the second terminal Mode; The number of repetitions of the PDSCH; the number of repetitions of the downlink control information; the format of the downlink control information; and the preamble transmitted when the terminal randomly accesses.
The method according to claim 13, wherein before the base station sends a downlink signal to the designated terminal, or before the base station sends a PDSCH to the first terminal, or the base station sends to the second terminal Before the downlink control information, the method further includes:

Transmitting, by the base station, the DCI or the first high layer signaling to the designated terminal, the first terminal, or the second terminal, where the DCI or the first high layer signaling carries an indication sent by the terminal The indication information of the second reference signal is transmitted on the time domain resource of the downlink signal and/or the frequency domain resource.
The method according to claim 13 or 16, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of the following: notification in the SIB, at the first upper layer Notifying in the signaling or in the DCI, notifying in the second high layer signaling, and receiving the random access response RAR in the specified terminal or the first terminal or the second terminal randomly accessing .
The method of claim 6 wherein

The resource location corresponding to the second time-frequency resource is an RE in the multiple resource unit RE set S, and the RE in the set S includes:

The frequency domain interval on the first, second, and third last symbols in each slot is 4 REs of 2 REs, and the starting RE positions of the 4 REs are determined by the base station cell identifier. ;

When the cyclic prefix CP of the symbol is a normal CP, the first, second, sixth, and seventh symbols on the third, fourth, sixth, and seventh symbols in each slot are the first, second, sixth, and 7, 11, and 12 REs;

The cyclic prefix of the symbol is an extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the last two symbols in the odd time slot 3rd, 6th, 9th, 12th RE;

Wherein, the symbols are sorted in order from chronological order, and the REs in the set S are sorted from 1 in order of frequency from lowest to highest.
A method for receiving a reference signal, comprising:

The terminal receives the first reference signal sent by the base station on the first time-frequency resource through the N antenna ports, where the first time-frequency resource is predefined and/or configured by the base station, where N is a positive integer.
The method of claim 21 wherein the manner of determining the first time-frequency resource comprises one of the following:

The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource where all or part of the public message is located, where the public time The message includes: a primary information block MIB, a system information block SIB, a paging message, downlink control information for scheduling the paging message, RAR, and downlink control information for scheduling the RAR; and determining according to a cell identifier of a cell in which the base station is located The first time frequency source;

The first time-frequency resource is configured by the base station by: the base station notifying the first time-frequency resource in an MIB and/or an SIB;

A portion of the first time-frequency resource is determined by the predefined manner, and the remaining portion is determined by the manner in which the base station is configured.
The method according to claim 22, wherein the manner of determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource in which all or part of the public message is located includes:

The antenna port of the first reference signal corresponding to all or part of the public message and/or the pattern corresponding to the antenna port is determined by the type of all or part of the public message.
The method according to claim 21 or 22, wherein the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is predefined or configured by the base station.
The method according to claim 22 or 24, wherein when the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is configured by the base station, the method includes: including in the MIB and/or the SIB The antenna port of the reference signal and/or the pattern information corresponding to the antenna port.
The method of claim 21, wherein the method further comprises:

The terminal receives a second reference signal that is sent by the base station by using a second time-frequency resource.
The method of claim 26, wherein

The subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, a subframe in which the primary synchronization signal PSS/secondary synchronization signal SSS is located, and a multicast/multicast single-frequency network MBSFN subframe.
The method of claim 27, wherein

In the standalone scenario of the independent operation, the symbol corresponding to the second time-frequency resource on the corresponding subframe is one or more symbols in the first four symbols of the subframe.
The method of claim 27, wherein

On the subframe, the symbol corresponding to the second time-frequency resource is one or more symbols in the following symbols:

a first symbol, a second symbol, and a third symbol in the last of each slot of the subframe;

The first four symbols of the subframe.
The method of claim 27, wherein

On the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or a symbol of an even index in the MBSFN area.
The method of claim 26, wherein the transmitting, by the base station, the second reference signal by using the second time-frequency resource comprises:

Receiving, by the terminal, the second reference signal by using the second time-frequency resource on a part or all of the N antenna ports of the base station.
The method of claim 26, wherein the second time-frequency resource and the first time-frequency resource do not overlap.
The method according to claim 26 or 31, wherein the second time-frequency resource is determined according to at least one of the following:

Transmitting, by the base station, a time domain resource and/or a frequency domain resource of the downlink signal to the designated terminal;

Transmitting, by the base station, time domain resources and/or frequency domain resources of the physical downlink shared channel PDSCH to the first terminal;

The base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.
The method of claim 33, further comprising:

The second time-frequency resource is determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, downlink control information for scheduling the PDSCH, and the designation. The type or transmission mode of the terminal or the first terminal or the second terminal.
The method of claim 34, wherein the scheduling downlink control information of the PDSCH comprises:

The downlink control information DCI includes indication information for transmitting the second reference signal on a time domain resource and/or a frequency domain resource that sends the PDSCH.
The method according to any one of claims 26 to 35, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port is preset or configured by the base station.
The method according to claim 33 or 35, wherein the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port are determined by:

The antenna port of the second reference signal and/or the pattern corresponding to the antenna port is determined by the base station according to at least one of: the type or transmission of the designated terminal or the first terminal or the second terminal a mode; a repetition number of the PDSCH; a repetition quantity of the downlink control information; a format of the downlink control information; and a preamble transmitted when the terminal randomly accesses.
The method according to claim 33, wherein before the base station sends a downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or the base station sends a downlink control to the second terminal. Before the information, the method further includes:

Transmitting, by the base station, the DCI or the first high layer signaling to the designated terminal, the first terminal, or the second terminal, where the DCI or the first high layer signaling carries an indication sent by the terminal The indication information of the second reference signal is transmitted on the time domain resource of the downlink signal and/or the frequency domain resource.
The method according to claim 33 or 35, wherein the antenna port of the second reference signal and/or the antenna The pattern corresponding to the port is configured by at least one of: notifying in the SIB, notifying in the first high layer signaling or in the DCI, notifying in the second high layer signaling, at the designated terminal or receiving or The notification in the random access response RAR received by the first terminal or the second terminal during random access.
The method of claim 26, wherein

The resource location corresponding to the second time-frequency resource is an RE in the multiple resource unit RE set S, and the RE in the set S includes:

The frequency domain interval on the first, second, and third last symbols in each slot is 4 REs of 2 REs, and the starting RE positions of the 4 REs are determined by the base station cell identifier. ;

When the cyclic prefix CP of the symbol is a normal CP, the first, second, sixth, and seventh symbols on the third, fourth, sixth, and seventh symbols in each slot are the first, second, sixth, and 7, 11, and 12 REs;

The cyclic prefix of the symbol is an extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the last two symbols in the odd time slot 3rd, 6th, 9th, 12th RE;

Wherein, the symbols are sorted in order from chronological order, and the REs in the set S are sorted from 1 in order of frequency from lowest to highest.
A transmitting device for a reference signal is applied to a base station side, and includes:

The first sending module is configured to send, by using the N antenna ports, the first reference signal on the first time-frequency resource, where the first time-frequency resource is predefined and/or configured by the base station, where N is a positive integer.
The apparatus of claim 41, wherein the manner of determining the first time-frequency resource comprises one of the following:

The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource where all or part of the public message is located, where the public time The message includes: a primary information block MIB, a system information block SIB, a paging message, downlink control information for scheduling the paging message, RAR, and downlink control information for scheduling the RAR; and determining according to a cell identifier of a cell in which the base station is located The first time-frequency resource;

The first time-frequency resource is configured by the base station by: the base station notifying the first time-frequency resource in an MIB and/or an SIB;

A portion of the first time-frequency resource is determined by the predefined manner, and the remaining portion is determined by the manner in which the base station is configured.
The apparatus according to claim 42, wherein the manner of determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource in which all or part of the public message is located includes:

The antenna port of the first reference signal corresponding to all or part of the public message and/or the pattern corresponding to the antenna port is determined by the type of all or part of the public message.
The apparatus according to claim 41 or 42, wherein the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is predefined or configured by the base station.
The apparatus according to claim 42 or 44, wherein when the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is configured by the base station, the method includes: including in the MIB and/or the SIB The antenna port of the reference signal and/or the pattern information corresponding to the antenna port.
The device of claim 41, wherein the device further comprises:

The second sending module is configured to send the second reference signal by using the second time-frequency resource.
The device according to claim 46, wherein

The subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, a subframe in which the primary synchronization signal PSS/secondary synchronization signal SSS is located, and a multicast/multicast single-frequency network MBSFN subframe.
The device according to claim 47, wherein

In the standalone operating standalone scenario, the second time-frequency resource corresponds to one or more symbols in the first four symbols of the subframe in the corresponding subframe.
The device according to claim 47, wherein

On the subframe, the symbol corresponding to the second time-frequency resource is one or more symbols in the following symbols:

a first symbol, a second symbol, and a third symbol in the last of each slot of the subframe;

The first four symbols of the subframe.
The device according to claim 47, wherein

On the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or a symbol of an even index in the MBSFN area.
The apparatus according to claim 46, wherein the transmitting, by the base station, the second reference signal by using the second time-frequency resource comprises:

And transmitting, by the base station, the second reference signal by using the second time-frequency resource on some or all of the N antenna ports.
The apparatus of claim 46, wherein the second time-frequency resource and the first time-frequency resource do not overlap.
The apparatus according to claim 46 or 51, wherein said second time-frequency resource is determined according to at least one of:

Transmitting, by the base station, a time domain resource and/or a frequency domain resource of the downlink signal to the designated terminal;

Transmitting, by the base station, time domain resources and/or frequency domain resources of the physical downlink shared channel PDSCH to the first terminal;

The base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.
The device according to claim 53, further comprising:

The second time-frequency resource is determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, and downlink control information for scheduling the PDSCH; The type or transmission mode of the terminal or the first terminal or the second terminal.
The apparatus according to claim 54, wherein the downlink control information for scheduling the PDSCH comprises:

The downlink control information DCI includes indication information for transmitting the second reference signal on a time domain resource and/or a frequency domain resource that sends the PDSCH.
The apparatus according to any one of claims 46 to 55, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port is preset or configured by the base station.
The apparatus according to claim 53 or 56, wherein the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port are determined by:

The antenna port of the second reference signal and/or the pattern corresponding to the antenna port is determined by the base station according to at least one of: the designated terminal and/or the type of the first terminal or the second terminal or a transmission mode; a repetition number of the PDSCH; a repetition quantity of the downlink control information; a format of the downlink control information; and a preamble transmitted when the terminal randomly accesses.
The apparatus according to claim 53, wherein before the base station transmits a downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or the base station sends a downlink control to the second terminal Before the information, the device further includes:

Transmitting, by the base station, the DCI or the first high layer signaling to the designated terminal, the first terminal, or the second terminal, where the DCI or the first high layer signaling carries an indication sent by the terminal The indication information of the second reference signal is transmitted on the time domain resource of the downlink signal and/or the frequency domain resource.
The apparatus according to claim 53 or 56, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of: notifying in the SIB, at the first upper layer Notifying in the signaling or in the DCI, notifying in the second high layer signaling, the random access response RAR or message received when the designated terminal or the first terminal or the second terminal randomly accesses In the notice.
The device according to claim 46, wherein

The resource location corresponding to the second time-frequency resource is an RE in the multiple resource unit RE set S, and the RE in the set S includes:

The frequency domain interval on the first, second, and third last symbols in each slot is 4 REs of 2 REs, and the starting RE positions of the 4 REs are determined by the base station cell identifier. ;

When the cyclic prefix CP of the symbol is a normal CP, the first, second, sixth, and seventh symbols on the third, fourth, sixth, and seventh symbols in each slot are the first, second, sixth, and 7, 11, and 12 REs;

The cyclic prefix of the symbol is an extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the last two symbols in the odd time slot 3rd, 6th, 9th, 12th RE;

Wherein, the symbols are sorted in order from chronological order, and the REs in the set S are sorted from 1 in order of frequency from lowest to highest.
A receiving device for a reference signal is applied to the terminal side, and includes:

The first receiving module is configured to receive, by the base station, a first reference signal that is sent by the N antenna ports on the first time-frequency resource, where the first time-frequency resource is predefined and/or configured by the base station, where A positive integer.
The apparatus of claim 61, wherein the manner of determining the first time-frequency resource comprises one of the following:

The predefined first time-frequency resource is determined by determining at least one of the following manners: determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource where all or part of the public message is located, where the public time The message includes: a primary information block MIB, a system information block SIB, a paging message, downlink control information for scheduling the paging message, RAR, and downlink control information for scheduling the RAR; and determining according to a cell identifier of a cell in which the base station is located The first time-frequency resource;

The first time-frequency resource is configured by the base station by: the base station notifying the first time-frequency resource in an MIB and/or an SIB;

A portion of the first time-frequency resource is determined by the predefined manner, and the remaining portion is determined by the manner in which the base station is configured.
The apparatus according to claim 62, wherein the determining the first time-frequency resource according to a time domain resource and/or a frequency domain resource in which all or part of the public message is located includes:

The antenna port of the first reference signal corresponding to all or part of the public message and/or the pattern corresponding to the antenna port is determined by the type of all or part of the public message.
The apparatus according to claim 61 or 62, wherein the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is predefined or configured by the base station.
The apparatus according to claim 62 or 64, wherein when the antenna port of the first reference signal and/or the pattern corresponding to the antenna port is configured by the base station, including the MIB and/or the SIB The antenna port of the reference signal and/or the pattern information corresponding to the antenna port.
The device of claim 61, wherein the device further comprises:

The base station sends a second reference signal by using a second time-frequency resource.
The device according to claim 66, wherein

The subframe corresponding to the second time-frequency resource is at least one of the following: a subframe in which the MIB is located, and a primary synchronization signal PSS/ The subframe in which the secondary synchronization signal SSS is located, the multicast/multicast single frequency network MBSFN subframe.
The apparatus according to claim 67, wherein

In the standalone operating standalone scenario, the second time-frequency resource corresponds to one or more symbols in the first four symbols of the subframe in the corresponding subframe.
The apparatus according to claim 67, wherein

On the subframe, the symbol corresponding to the second time-frequency resource is one or more symbols in the following symbols:

a first symbol, a second symbol, and a third symbol in the last of each slot of the subframe;

The first four symbols of the subframe.
The device according to claim 68, wherein

On the MBSFN subframe, the symbol corresponding to the second time-frequency resource is each symbol in the MBSFN area, or an symbol of an odd index in the MBSFN area, or a symbol of an even index in the MBSFN area.
The apparatus according to claim 66, wherein the transmitting, by the base station, the second reference signal by using the second time-frequency resource comprises:

Receiving, by the terminal, the second reference signal by using the second time-frequency resource on a part or all of the N antenna ports of the base station.
The apparatus of claim 66, wherein the second time-frequency resource and the first time-frequency resource do not overlap.
The apparatus of claim 66 or 71, wherein the second time-frequency resource is determined according to at least one of:

Transmitting, by the base station, a time domain resource and/or a frequency domain resource of the downlink signal to the designated terminal;

Transmitting, by the base station, time domain resources and/or frequency domain resources of the physical downlink shared channel PDSCH to the first terminal;

The base station sends the time domain resource and/or the frequency domain resource of the downlink control information to the second terminal.
The device of claim 73, further comprising:

The second time-frequency resource is determined according to at least one of the following: the number of repetitions of the PDSCH, the number of repetitions of the downlink control information, the format of the downlink control information, downlink control information for scheduling the PDSCH, and the designation. The type or transmission mode of the terminal or the first terminal or the second terminal.
The apparatus according to claim 74, wherein the downlink control information for scheduling the PDSCH comprises:

The downlink control information DCI includes indication information for transmitting the second reference signal on a time domain resource and/or a frequency domain resource that sends the PDSCH.
The apparatus according to any one of claims 66 to 75, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port is preset or configured by the base station.
The apparatus according to claim 73 or 75, wherein the antenna port of the second reference signal and/or the preset pattern corresponding to the antenna port are determined by:

The antenna port of the second reference signal and/or the pattern corresponding to the antenna port is determined by the base station according to at least one of the following: a type or transmission of the designated terminal and the first terminal or the second terminal a mode; a repetition number of the PDSCH; a repetition quantity of the downlink control information; a format of the downlink control information; and a preamble transmitted when the terminal randomly accesses.
The apparatus according to claim 73, wherein before the base station transmits a downlink signal to the designated terminal, or before the base station sends the PDSCH to the first terminal, or the base station sends a downlink control to the second terminal Before the information, the device further includes:

The third receiving module is configured to receive the DCI or the first high layer signaling sent by the base station, where the DCI or the first high layer signaling carries a time domain resource indicating that the terminal sends a downlink signal and/or Or the indication information of the second reference signal is sent on the frequency domain resource.
The apparatus according to claim 73 or 75, wherein the antenna port of the second reference signal and/or the pattern corresponding to the antenna port are configured by at least one of: notifying in the SIB, at the first upper layer Notifying in the signaling or in the DCI, notifying in the second high layer signaling, the random access response RAR or message received when the designated terminal or the first terminal or the second terminal randomly accesses In the notice.
The device according to claim 71, wherein

The resource location corresponding to the second time-frequency resource is an RE in the multiple resource unit RE set S, and the RE in the set S includes:

The frequency domain interval on the first, second, and third last symbols in each slot is 4 REs of 2 REs, and the starting RE positions of the 4 REs are determined by the base station cell identifier. ;

When the cyclic prefix CP of the symbol is a normal CP, the first, second, sixth, and seventh symbols on the third, fourth, sixth, and seventh symbols in each slot are the first, second, sixth, and 7, 11, and 12 REs;

The cyclic prefix of the symbol is an extended CP, the second, fifth, eighth, and eleventh REs on the last two symbols in the even time slot, and the last two symbols in the odd time slot 3rd, 6th, 9th, 12th RE;

Wherein, the symbols are sorted in order from chronological order, and the REs in the set S are sorted from 1 in order of frequency from lowest to highest.