WO2018196527A1 - 辅助参考信号的发送和接收方法、网络侧设备及终端 - Google Patents

辅助参考信号的发送和接收方法、网络侧设备及终端 Download PDF

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WO2018196527A1
WO2018196527A1 PCT/CN2018/080526 CN2018080526W WO2018196527A1 WO 2018196527 A1 WO2018196527 A1 WO 2018196527A1 CN 2018080526 W CN2018080526 W CN 2018080526W WO 2018196527 A1 WO2018196527 A1 WO 2018196527A1
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reference signal
time
frequency resource
auxiliary reference
location
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PCT/CN2018/080526
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English (en)
French (fr)
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倪吉庆
周伟
易芝玲
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中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2018196527A1 publication Critical patent/WO2018196527A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method for transmitting and receiving auxiliary reference signals, a network side device, and a terminal.
  • the pilot used for control channel demodulation in the LTE (Long Term Evolution) system is a C-RS (Cell Reference Signal) with a fixed pattern, which is distributed over the entire bandwidth, and the number of reference signals and antenna ports is Direct correspondence.
  • C-RS Cell Reference Signal
  • a fixed pattern based reference symbol design (always on, for example: C-RS) can provide good channel estimation performance, but because of the lack of user characteristics, it is easy to cause in the case of fewer users and lower traffic. A large amount of energy is wasted.
  • Another method is to transmit the reference signal only on the associated control channel, which can reduce the overhead of the reference signal, but will reduce the channel estimation performance, resulting in a decrease in the reliability of the control information transmission.
  • the present disclosure provides a method for transmitting and receiving an auxiliary reference signal, a network side device, and a terminal.
  • the auxiliary reference signal may be transmitted on the space time-frequency resource (without control information) for improving the channel estimation performance of the adjacent control unit to improve the reliability of the control information transmission.
  • An embodiment of the present disclosure provides a method for transmitting a control channel auxiliary reference signal, including:
  • the first time-frequency resource and the second time-frequency resource belong to the same control resource set.
  • the step of sending the auxiliary reference signal on the second time-frequency resource includes:
  • each physical resource block includes two first locations;
  • determining, according to the first location of the physical resource block that sends the reference signal, the step of sending the second location of the auxiliary reference signal includes:
  • a plurality of positions respectively identical to the plurality of first positions are all determined as a plurality of second positions for transmitting the auxiliary reference signal;
  • a plurality of locations that are the same as the first time-frequency resource are determined as the second location that sends the auxiliary reference signal among the plurality of locations that are the same as the plurality of first locations;
  • the sending the auxiliary reference signal on the physical resource block corresponding to the second location includes: sending the auxiliary reference signal at multiple second locations determined in the second time-frequency resource.
  • the reference signal sent by the first time-frequency resource and the auxiliary reference signal sent by the second time-frequency resource are uniformly generated, and the unified reference signal sequence is followed by one or more parameters The change varies: the cell ID, the control resource set indication, the subframe number, and the slot number.
  • An embodiment of the present disclosure further provides a method for receiving a control channel auxiliary reference signal, including:
  • Channel estimation is performed based on the reference signal and the auxiliary reference signal.
  • the multiple second locations where the physical resource blocks of the auxiliary reference signal are located are respectively the same as the first location where the physical resource block that receives the reference signal is located;
  • the second location where the physical resource block receiving the auxiliary reference signal is located is the second position that is the same as the first location closest to the first location;
  • the second location where the physical resource block receiving the auxiliary reference signal is located is the second location that is all the same as the first location.
  • An embodiment of the present disclosure further provides a network side device, including:
  • a determining module configured to determine a first time-frequency resource and a second time-frequency resource, where the first time-frequency resource sends control information and a reference signal, and the second time-frequency resource has no control information to send;
  • a sending module configured to send an auxiliary reference signal on the second time-frequency resource
  • the first time-frequency resource and the second time-frequency resource belong to the same control resource set.
  • An embodiment of the present disclosure further provides a terminal, including:
  • a receiving module configured to receive a reference signal on a first time-frequency resource that sends control information
  • a processing module configured to perform channel estimation according to the reference signal and the auxiliary reference signal, where the first time-frequency resource and the second time-frequency resource belong to the same control resource set.
  • Embodiments of the present disclosure also provide a network side device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, when the processor executes the computer program The steps of the method of transmitting the auxiliary reference signal as described above.
  • Embodiments of the present disclosure also provide a terminal, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program as described above The steps of the method of receiving the auxiliary reference signal.
  • Embodiments of the present disclosure also provide a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of a method of transmitting an auxiliary reference signal as described above.
  • Embodiments of the present disclosure also provide a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the method of receiving an auxiliary reference signal as described above.
  • 1 is a configuration pattern for a number of antenna ports in the related art
  • 3 is a configuration pattern for the number of four antenna ports in the related art
  • FIG. 4 is a flowchart of a method for transmitting an auxiliary reference signal according to some embodiments of the present disclosure
  • FIG. 5 is a schematic diagram of a reference signal design based on adjacent space time-frequency resource assistance according to some embodiments of the present disclosure
  • FIG. 6 is a schematic diagram of a unified design of a control channel auxiliary reference signal and a reference signal according to some embodiments of the present disclosure
  • FIG. 7 is a schematic diagram of reference signal mapping according to some embodiments of the present disclosure.
  • FIG. 8 is a schematic diagram of user resource mapping according to some embodiments of the present disclosure.
  • FIG. 9 is a schematic diagram of reference signal mapping according to further embodiments of the present disclosure.
  • FIG. 10 is a schematic diagram of a separate design of a reference signal for each terminal of a control channel according to some embodiments of the present disclosure
  • FIG. 11 is a schematic diagram of reference signal mapping according to further embodiments of the present disclosure.
  • FIG. 1 is a configuration pattern for one antenna port number in the related art
  • FIG. 2 is a configuration pattern for two antenna port numbers in the related art
  • FIG. 3 is related to the related art.
  • a fixed pattern based reference symbol design (always on, for example: C-RS) can provide good channel estimation performance, but because of the lack of user characteristics, it is easy to cause in the case of fewer users and lower traffic. A large amount of energy is wasted.
  • the present application proposes a control channel pilot design method.
  • the main idea is to transmit an auxiliary reference signal on adjacent empty time-frequency resources to improve the control channel estimation performance, thereby improving the reliability of control information transmission.
  • some embodiments of the present disclosure provide a method for transmitting an auxiliary reference signal, including:
  • Step 41 Determine a first time-frequency resource of the control channel, where the first time-frequency resource sends control information and a reference signal;
  • Step 42 Determine a second time-frequency resource of the control channel, where the second time-frequency resource has no control information, where the first time-frequency resource and the second time-frequency resource belong to the same control resource set;
  • Step 43 Send an auxiliary reference signal on the second time-frequency resource.
  • the first time-frequency resource sends control information and a reference signal; determining a second time-frequency resource, where the second time-frequency resource has no control information, and the space-time-frequency resource is available. (No control information) is transmitted on the auxiliary reference signal for improving the channel estimation performance of the adjacent control unit to improve the control information transmission reliability to transmit the auxiliary reference signal on the second time-frequency resource.
  • step 43 may include:
  • Step 431 Determine, in the first time-frequency resource, a plurality of first locations of physical resource blocks that send multiple reference signals (such as the location of the reference signal RS in FIG. 5), and send a reference signal to a first location.
  • Each physical resource block contains two first locations;
  • Step 432 in the second time-frequency resource, determining, according to the first location of the physical resource block that sends the reference signal, the second location of sending the auxiliary reference signal (as shown in FIG. 5, the PRB of the RS in the empty PRB is sent; Or as shown in FIG. 6, the PRBs of the auxiliary reference signals RS0, RS1, RS4, RS5, RS6, and RS7; wherein, in FIG. 6, RS0, RS5, and RS6 are not transmitted, and RS1, RS4, and RS7 are transmitted;
  • Step 433 Send an auxiliary reference signal on the physical resource block corresponding to the second location (such as sending RS1, RS4, and RS7 on the PRB corresponding to RS1, RS4, and RS7).
  • the first time-frequency resource and the second time-frequency resource are both a control resource set, and the control resource set is part of a control channel time-frequency resource. It should be noted that the first time-frequency resource and the second time-frequency resource may also be time-frequency resources in the same control resource set, or may be time-frequency resources in different control resource sets.
  • the foregoing step 432 may specifically include:
  • the plurality of locations that are the same as the multiple first locations are all determined as the multiple second locations where the physical resource blocks that send the auxiliary reference signals are located.
  • the auxiliary reference signal is sent at a plurality of second locations where the physical resource block determined to be the secondary reference frequency signal is located in the second time-frequency resource.
  • the reference signal and the auxiliary reference signal generate a unified reference signal sequence according to information such as a cell ID, a control resource set indication, a subframe number, or a slot number; and the unified reference signal sequence is as described
  • the change in one or more parameters of the cell ID, the control resource set indication, the subframe number, and the slot number changes.
  • the sequence length is equal to twice the number of physical resource blocks included in the control resource set, and the reference signal sequence has a one-to-one correspondence with the plurality of first locations and the plurality of second locations.
  • the RSs of multiple users may be shared; the empty time-frequency resources may configure whether the RS exists as needed.
  • control resource set is centralized or distributed, and the user blind detection space adopts a Hierarchical design, as shown in FIG. 7.
  • each CCE contains one PRB.
  • the RS adopts a unified design: a total of 8 PRBs, assuming that one PRB contains 2 RSs per port, and the RS length is 16;
  • the RS sequence is mapped to the corresponding time-frequency resource by CCE sequence. It is worth noting that the RS exists in the PRB throughout the searched space.
  • the user performs joint channel estimation based on the existing RS, and performs blind detection on the control information.
  • the foregoing step 432 may specifically include:
  • a plurality of locations that are the same as the first time-frequency resource are determined as the physical resource block that sends the auxiliary reference signal among the multiple locations that are the same as the multiple first locations. The second location.
  • the auxiliary reference signal is sent at a plurality of second locations where the physical resource block determined to be the secondary reference frequency signal is located in the second time-frequency resource.
  • control resource set adopts a centralized distribution
  • the CCE to PRB is also a centralized mapping
  • the user blind detection space adopts a Hierarchical design.
  • each PDCCH has a maximum of 8 CCEs (Control Channel Elements), and each CCE contains 1 PRB.
  • the RS adopts a unified design: a total of 8 PRBs, assuming that one PRB contains 2 RSs per port, and the RS length is 16;
  • the RS sequence is mapped to the corresponding time-frequency resource according to the CCE sequence, and the RS is transmitted only on the PRB with control information transmission and the PRB of the adjacent space-time resource; the RS is not transmitted on the PRB far from the control data. As shown in FIG. 9, since RS0, RS1 and RS2 are far from the control data, and no RS is transmitted.
  • the user performs blind detection on the control information based on whether the PRB is empty by the energy detection and performs joint channel estimation based on the RS that may exist.
  • the reference signal and the auxiliary reference signal generate a separate reference signal sequence for each terminal according to the terminal ID, the control resource set indication, the subframe number, or the slot number;
  • Each individual reference signal sequence has a length equal to twice the physical resource block occupied by the control channel of the corresponding terminal;
  • the auxiliary reference signal is sent at a plurality of second locations where the physical resource block determined to be the secondary reference frequency signal is located in the second time-frequency resource.
  • the configuration of the auxiliary reference signal transmitted at the second location is the same as the reference signal transmitted by the physical resource block at the first location adjacent to the second location.
  • the RS sequence is separately designed, and is related to information such as a user ID and a control resource set indication;
  • space-time-frequency resources can be configured to have RSs as needed.
  • the RS on the space time-frequency resource is the same as the RS configuration of the adjacent time-frequency resource.
  • the control resource set adopts a centralized distribution
  • the CCE to PRB is also a centralized mapping
  • the user blind detection space adopts a Hierarchical design.
  • the maximum aggregation level is 8, that is, one PDCCH has a maximum of 8 CCEs (Control Channel Elements), and each CCE contains 1 PRB.
  • the RS is designed separately: the RS length per user is related to the number of occupied PRBs. It is assumed that each PRB contains 2 RSs per port, the UE1RS length is 2, the UE2RS length is 2, and the UE3RS length is 4.
  • the RS sequence is mapped per UE to the corresponding time-frequency resource.
  • the RS is transmitted on the PRB controlling the data transmission and the adjacent PRB; the RS transmitted on the space-time resource is the same as the adjacent RS.
  • the user performs blind detection on the control information based on whether the PRB is empty by the energy detection and performs channel estimation based on the existing RS.
  • control channel demodulation reference signal is sent along with the path, and does not always exist, which can effectively reduce the RS overhead and reduce the system energy consumption; and send the auxiliary reference signal on the adjacent space time-frequency resources, which can improve the control unit. Channel estimation performance, thereby improving the reliability of control information transmission;
  • the unified design method of the RS sequence can flexibly configure the RS of different PRBs; the design of the RS sequence based on the UE specific is flexible and simple, and is easy to implement.
  • An embodiment of the present disclosure further provides a method for receiving an auxiliary reference signal, including:
  • Channel estimation is performed based on the reference signal and the auxiliary reference signal, and control information is detected.
  • the first time-frequency resource and the second time-frequency resource are both a control resource set, and the control resource set is part of a control channel time-frequency resource.
  • the plurality of second locations where the physical resource blocks receiving the auxiliary reference signal are located are respectively the same as the first location where the physical resource block receiving the reference signal is located;
  • the second location where the physical resource block receiving the auxiliary reference signal is located is the second position that is the same as the first location closest to the first location;
  • the second location where the physical resource block receiving the auxiliary reference signal is located is the second location that is all the same as the first location.
  • the terminal receives the reference signal on the first time-frequency resource of the control information of the control channel, and receives the auxiliary reference signal on the second time-frequency resource adjacent to the first time-frequency resource, where the second time-frequency resource There is no control information transmission; channel estimation is performed according to the reference signal and the auxiliary reference signal, so that channel estimation performance can be improved.
  • An embodiment of the present disclosure further provides a network side device, including:
  • a determining module configured to determine a first time-frequency resource and a second time-frequency resource of the control channel, where the first time-frequency resource sends control information and a reference signal, and the second time-frequency resource has no control information to send;
  • a sending module configured to send an auxiliary reference signal on the second time-frequency resource
  • the first time-frequency resource and the second time-frequency resource belong to the same control resource set.
  • the network side device is a device corresponding to the network side method, and all implementations of the network side method are applicable to the network side device embodiment, and the same technical effects can be achieved.
  • the network side device may be a base station, and the mapping module of the base station may be implemented by a processor of the base station, and the sending module may be implemented by a transmitter of the base station.
  • the base station may further include storing the related information. Memory, etc.
  • An embodiment of the present disclosure further provides a terminal, including:
  • a receiving module configured to receive a reference signal on a first time-frequency resource of the control information of the control channel
  • a processing module configured to perform channel estimation according to the reference signal and the auxiliary reference signal, and detect control information.
  • the terminal is a device corresponding to the method received by the terminal side, and all implementations of the method on the terminal side are applicable to the embodiment of the terminal, and the same technical effects can be achieved.
  • the terminal may be a user equipment, and the acquiring module and the receiving module may be implemented by a receiver of the terminal, and the related processing procedure may be implemented by a processor of the terminal, and the terminal may further include storing the foregoing.
  • the above embodiments of the present disclosure can transmit an auxiliary reference signal on space-time-frequency resources (no control information) for improving channel estimation performance of adjacent control units to improve control information transmission reliability.
  • the RS sequence is uniformly designed.
  • One method is: for a PRB without control information transmission, if it is far from the control unit, the RS can be blanked; if it is closer to the control unit, the RS can be sent, and the auxiliary is used to improve the channel estimation performance.
  • the RS sequence is uniformly designed.
  • One method is: this user controls the total transmission of RSs in the channel search space, and is used to improve channel estimation performance.
  • each UE RS is designed separately. For a PRB without control information transmission, if it is far from the control unit, the RS can be blanked; if it is closer to the control unit, the RS is configured to transmit RS symbols of adjacent PRBs, and the auxiliary is used to improve channel estimation performance.
  • control channel demodulation reference signal is sent along with the path, and does not always exist, which can effectively reduce RS overhead and reduce system energy consumption;
  • Sending the auxiliary reference signal on the adjacent space time-frequency resources can improve the channel estimation performance of the control unit, thereby improving the reliability of the control information transmission;
  • the unified design method of the RS sequence can flexibly configure the RS of different PRBs; the design of the RS sequence based on the UE specific is flexible and simple, and is easy to implement.

Abstract

本公开提供一种辅助参考信号的发送和接收方法、网络侧设备及终端。辅助参考信号的发送方法包括：确定第一时频资源，所述第一时频资源发送控制信息及参考信号；确定第二时频资源，所述第二时频资源没有控制信息发送；在所述第二时频资源上发送辅助参考信号。第一时频资源和所述第二时频资源属于同一个控制资源集合。

Description

辅助参考信号的发送和接收方法、网络侧设备及终端
相关申请的交叉引用
本申请主张在2017年4月24日在中国提交的中国专利申请号No.201710270501.5的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，特别是指一种辅助参考信号的发送和接收方法、网络侧设备及终端。
背景技术
目前，LTE(Long Term Evolution，长期演进)系统中用于控制信道解调的导频是采用固定图案的C-RS(小区参考信号)，分布在整个带宽范围内，参考信号与天线端口数有直接对应关系。
基于固定图案的参考符号设计方案(always on，例如：C-RS)可以提供很好的信道估计性能，但由于不考虑业务特性，在用户数较少和业务量较低的情况下，容易造成较大的能量浪费。
另外一种方法是只在随路控制信道上面发送参考信号，其可以减少参考信号的开销，但会降低信道估计性能，导致控制信息传输可靠性下降。
发明内容
本公开提供了一种辅助参考信号的发送和接收方法、网络侧设备及终端。可在空时频资源(无控制信息)上传输辅助参考信号，用于提升相邻控制单元的信道估计性能，以提升控制信息传输可靠性。
本公开的实施例提供了一种控制信道辅助参考信号的发送方法，包括：
确定第一时频资源，所述第一时频资源发送控制信息及参考信号；
确定第二时频资源，所述第二时频资源没有控制信息发送；
在所述第二时频资源上发送辅助参考信号；
其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
可选地，在所述第二时频资源上发送辅助参考信号的步骤包括：
在所述第一时频资源中，确定发送多个参考信号的物理资源块的多个第一位置，一个第一位置发送一个参考信号；每一个物理资源块包含两个第一位置；
在所述第二时频资源中，根据发送参考信号的物理资源块的第一位置，确定发送辅助参考信号的第二位置；
在所述第二位置对应的物理资源块上发送辅助参考信号。
可选地，在所述第二时频资源中，根据发送参考信号的物理资源块的第一位置，确定发送辅助参考信号的第二位置的步骤包括：
在所述第二时频资源中，将与多个第一位置分别相同的多个位置，全部确定为发送辅助参考信号的多个第二位置；或者
在所述第二时频资源中，将与多个第一位置相同的多个位置中，将距离第一时频资源最近的多个位置，确定为发送辅助参考信号的第二位置；
其中，在所述第二位置对应的物理资源块上发送辅助参考信号包括：在所述第二时频资源中确定的多个第二位置上，发送所述辅助参考信号。可选地，在所述第一时频资源发送的参考信号和在所述第二时频资源发送的辅助参考信号统一生成，且所述统一参考信号序列是随着下列一项或多项参数变化而变化：所述小区ID、控制资源集合指示、子帧号和时隙号。
本公开的实施例还提供一种控制信道辅助参考信号的接收方法，包括：
在发送控制信息的第一时频资源上接收参考信号；
在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合；
根据所述参考信号以及所述辅助参考信号进行信道估计。
可选地，在所述第二时频资源中，接收辅助参考信号的物理资源块所在的多个第二位置，分别与接收参考信号的物理资源块所在的第一位置相同；或者
在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位置，为距离第一位置最近的与第一位置相同的第二位置；或者
在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位置为全部与第一位置相同的第二位置。
本公开的实施例还提供一种网络侧设备，包括：
确定模块，用于确定第一时频资源和第二时频资源，所述第一时频资源发送控制信息及参考信号，所述第二时频资源没有控制信息发送；
发送模块，用于在所述第二时频资源上发送辅助参考信号；
其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
本公开的实施例还提供一种终端，包括：
接收模块，用于在发送控制信息的第一时频资源上接收参考信号；以及
在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；
处理模块，用于根据所述参考信号以及所述辅助参考信号进行信道估计；其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
本公开的实施例还提供一种网络侧设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述的辅助参考信号的发送方法的步骤。
本公开的实施例还提供一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述的辅助参考信号的接收方法的步骤。
本公开的实施例还提供一种计算机可读存储介质，其上存储有计算机程序，所述程序被处理器执行时，实现如上所述的辅助参考信号的发送方法的步骤。
本公开的实施例还提供一种计算机可读存储介质，其上存储有计算机程序，所述程序被处理器执行时，实现如上所述的辅助参考信号的接收方法的步骤。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附 图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为相关技术中针对一个天线端口数的配置图案；
图2为相关技术中针对两个天线端口数的配置图案；
图3为相关技术中针对四个天线端口数的配置图案；
图4为本公开的一些实施例的辅助参考信号的发送方法的流程图；
图5为本公开的一些实施例的基于相邻空时频资源辅助的参考信号设计示意图；
图6为本公开的一些实施例的控制信道辅助参考信号以及参考信号统一设计的示意图；
图7为本公开的一些实施例的参考信号映射示意图；
图8为本公开的一些实施例的用户资源映射示意图；
图9为本公开的另一些实施例的参考信号映射示意图；
图10为本公开的一些实施例的控制信道的每个终端的参考信号单独设计的示意图；
图11为本公开的另一些实施例的参考信号映射示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
如图1、图2和图3所示，其中图1为相关技术中针对一个天线端口数的配置图案，图2为相关技术中针对两个天线端口数的配置图案，图3为相关技术中针对四个天线端口数的配置图案，配置好后，按照配置好的固定图案，固定发送。基于固定图案的参考符号设计方案(always on，例如：C-RS)可以提供很好的信道估计性能，但由于不考虑业务特性，在用户数较少和业务量较低的情况下，容易造成较大的能量浪费。
本申请提出了一种控制信道导频设计方法，主要思想是在相邻的空的时 频资源上发送辅助参考信号，以提升控制信道估计性能，进而提升控制信息传输可靠性。
如图4所示，本公开的一些实施例提供一种辅助参考信号的发送方法，包括：
步骤41，确定控制信道的第一时频资源，所述第一时频资源发送控制信息及参考信号；
步骤42，确定控制信道的第二时频资源，所述第二时频资源没有控制信息发送，其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合；
步骤43，在所述第二时频资源上发送辅助参考信号；
该实施例通过确定第一时频资源，所述第一时频资源发送控制信息及参考信号；确定第二时频资源，所述第二时频资源没有控制信息发送；可在空时频资源(无控制信息)上传输辅助参考信号，用于提升相邻控制单元的信道估计性能，以提升控制信息传输可靠性在所述第二时频资源上发送辅助参考信号。
如图5所示，在空的时频资源辅助的参考信号设计示意图。时域上包括2个OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号，频域上36个PRB(物理资源块)，本公开的一具体实施例中，步骤43可以包括：
步骤431，在所述第一时频资源中，确定发送多个参考信号的物理资源块的多个第一位置(如图5中发送参考信号RS的位置)，一个第一位置发送一个参考信号；每一个物理资源块包含两个第一位置；
步骤432，在所述第二时频资源中，根据发送参考信号的物理资源块的第一位置，确定发送辅助参考信号的第二位置(如图5中，空的PRB中发送RS的PRB；或者如图6中，辅助参考信号RS0、RS1、RS4、RS5、RS6、RS7的PRB；其中，图6中所示的是RS0、RS5、RS6未发送，RS1、RS4、RS7发送)；
步骤433，在所述第二位置对应的物理资源块上发送辅助参考信号(如在RS1、RS4、RS7所对应的PRB上发送RS1、RS4、RS7)。
本公开的上述实施例中，所述第一时频资源和第二时频资源均为一控制资源集合，控制资源集合是控制信道时频资源的一部分。需要说明的是：该第一时频资源和第二时频资源也可以是同一个控制资源集合中的时频资源，也可以是不同的控制资源集合中的时频资源。
具体的，上述步骤432具体可以包括：
4321，在所述第二时频资源中，将与多个第一位置分别相同的多个位置，全部确定为发送辅助参考信号的物理资源块的所在的多个第二位置；
相应的，在所述第二时频资源中确定为发送辅助参考信号的物理资源块所在的多个第二位置上，发送辅助参考信号。
如图6和7所示，参考信号和辅助参考信号根据小区ID、控制资源集合指示、子帧号或时隙号等信息生成统一参考信号序列；且所述统一参考信号序列是随着所述小区ID、控制资源集合指示、子帧号和时隙号中的一项或多项参数的变化而变化。序列长度等于控制资源集合包含的物理资源块个数的两倍，该参考信号序列与多个第一位置和多个第二位置有一一对应关系。
该统一设计参考信号的实施例中，多个用户的RS可以共享；空的时频资源可以按需配置RS是否存在。
在具体的实施例中，控制资源集合采用集中式或分布式，用户盲检测空间采用Hierarchical(分层搜索空间)设计，如图7所示。
假设，最大汇聚等级为8，即一个PDCCH(Physical Downlink Control Channel，物理下行控制信道)最大有8个CCE(控制信道元素)，每一个CCE包含1个PRB。
一个搜索空间内，RS采用统一设计：一共含有8个PRB，假设一个PRB每端口含有2个RS，RS长度为16；
RS序列按CCE序列映射到相应的时频资源上。值得注意的是，RS在整个所搜空间内的PRB内均存在。
用户基于存在的RS进行联合信道估计，对控制信息进行盲检测。
该统一设计参考信号的实施例中，上述步骤432具体还可以包括：
4322，在所述第二时频资源中，将与多个第一位置相同的多个位置中，将距离第一时频资源最近的多个位置，确定为发送辅助参考信号的物理资源 块的所在的第二位置。
相应的，在所述第二时频资源中确定为发送辅助参考信号的物理资源块所在的多个第二位置上，发送辅助参考信号。
具体的实施例如图8和图9所示：控制资源集合采用集中式分布，CCE到PRB也是集中式映射，用户盲检测空间采用Hierarchical设计。
假设，最大汇聚等级为8，即一个PDCCH最大有8个CCE(控制信道元素)，每一个CCE包含1个PRB。
一个搜索空间内，RS采用统一设计：一共含有8个PRB，假设一个PRB每端口含有2个RS，RS长度为16；
RS序列按CCE序列映射到相应的时频资源上，只在有控制信息传输的PRB和相邻空时频资源的PRB上传输RS；离控制数据较远的PRB上不传送RS。如图9所示，由于RS0，RS1和RS2距离控制数据较远，并没有发送RS。
用户基于通过能量检测判断PRB是否为空，并基于可能存在的RS进行联合信道估计，对控制信息进行盲检测。
本公开的一具体实施例中，参考信号和辅助参考信号根据终端ID、控制资源集合指示、子帧号或时隙号为每个终端生成单独参考信号序列；
每个单独参考信号序列长度等于对应终端的控制信道占用的物理资源块的两倍；
相应的，在所述第二时频资源中确定为发送辅助参考信号的物理资源块所在的多个第二位置上，发送辅助参考信号。
在第二位置上发送的辅助参考信号的配置与该第二位置相邻的第一位置上的物理资源块发送的参考信号相同。
具体的实施例如图10所示，如果在某一个控制资源集合内，采用基于用户的波束赋形方案(UE specific Beamforming)：RS序列单独设计，与用户ID、控制资源集合指示等信息相关；
用户之间RS不可以共享；空时频资源可以按需配置RS是否存在；
空时频资源上的RS与相邻时频资源的RS配置相同。
如图11所示，控制资源集合采用集中式分布，CCE到PRB也是集中式 映射，用户盲检测空间采用Hierarchical设计。假设，最大汇聚等级为8，即一个PDCCH最大有8个CCE(控制信道元素)，每一个CCE包含1个PRB。
一个搜索空间内，RS采用单独设计：每用户RS长度与占用PRB个数有关，假设每PRB每端口含有2个RS，UE1RS长度为2，UE2RS长度为2，UE3RS长度为4；
RS序列按每UE映射到相应时频资源上。在控制数据传输的PRB和相邻的PRB上传输RS；空时频资源上传输的RS与相邻RS相同。
用户基于通过能量检测判断PRB是否为空，并基于存在的RS进行信道估计，对控制信息进行盲检测。
本公开的上述实施例中，控制信道解调参考信号随路发送，不一直存在，可以有效减少RS开销，降低系统能耗；在相邻空时频资源上发送辅助参考信号，可以提升控制单元的信道估计性能，进而提升控制信息发送可靠性；
基于发送分集方案，RS序列的统一设计方法，可对不同PRB的RS灵活配置；基于UE specific的RS序列设计，灵活简单，便于实现。
本公开的实施例还提供一种辅助参考信号的接收方法，包括：
在控制信道的发送控制信息的第一时频资源上接收参考信号；
在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合；
根据所述参考信号以及所述辅助参考信号进行信道估计，并检测控制信息。
其中，所述第一时频资源和第二时频资源均为一控制资源集合，控制资源集合是控制信道时频资源的一部分。
其中，在所述第二时频资源中，接收辅助参考信号的物理资源块所在的多个第二位置，分别与接收参考信号的物理资源块所在的第一位置相同；或者
在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位置，为距离第一位置最近的与第一位置相同的第二位置；或者
在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位 置为全部与第一位置相同的第二位置。
该终端通过在控制信道的发送控制信息的第一时频资源上接收参考信号；在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；根据所述参考信号以及所述辅助参考信号进行信道估计，从而可以提升信道估计性能。
本公开的实施例还提供一种网络侧设备，包括：
确定模块，用于确定控制信道的第一时频资源和第二时频资源，所述第一时频资源发送控制信息及参考信号，所述第二时频资源没有控制信息发送；
发送模块，用于在所述第二时频资源上发送辅助参考信号；
其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
需要说明的是：该网络侧设备是与上述网络侧的方法对应的设备，上述网络侧的方法的所有实现方式均适用于该网络侧设备的实施例中，也能达到相同的技术效果。且进一步的，该网络侧设备可以是基站，且该基站的映射模块可以由该基站的处理器实现，发送模块可以由基站的发射机来实现，进一步的，该基站还可以包括存储上述相关信息的存储器等。
本公开的实施例还提供一种终端，包括：
接收模块，用于在控制信道的发送控制信息的第一时频资源上接收参考信号；以及
在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合；
处理模块，用于根据所述参考信号以及所述辅助参考信号进行信道估计，并检测控制信息。
该终端是与上述终端侧接收的方法对应的设备，上述终端侧的方法的所有实现方式均适用于该终端的实施例中，也能达到相同的技术效果。且进一步的，该终端可以是用户设备，且该获取模块以及接收模块均可以由该终端的接收机实现，且其中的相关处理过程可以由终端的处理器来实现，该终端还可以包括存储上述相关信息的存储器，发送相关信息的发射机等。本公开的上述实施例可在空时频资源(无控制信息)上传输辅助参考信号，用于提 升相邻控制单元的信道估计性能，以提升控制信息传输可靠性。
对于发送分集方案，RS序列统一设计。一种方法是：对于无控制信息传输的PRB，如果离控制单元较远，RS可以置空；如果离控制单元较近，RS可以发送，辅助用于提升信道估计性能。
对于发送分集方案，RS序列统一设计。一种方法是：这个用户控制信道搜索空间内的RS全部发送，辅助用于提升信道估计性能。
对于基于UE的波束赋形方案，每UE RS单独设计。对于无控制信息传输的PRB，如果离控制单元较远，RS可以置空；如果离控制单元较近，RS配置为相邻PRB的RS符号发送，辅助用于提升信道估计性能。
且进一步的，控制信道解调参考信号随路发送，不一直存在，可以有效减少RS开销，降低系统能耗；
在相邻空时频资源上发送辅助参考信号，可以提升控制单元的信道估计性能，进而提升控制信息发送可靠性；
基于发送分集方案，RS序列的统一设计方法，可对不同PRB的RS灵活配置；基于UE specific的RS序列设计，灵活简单，便于实现。
以上所述是本公开的可选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (12)

  1. 一种辅助参考信号的发送方法，包括：
    确定第一时频资源，所述第一时频资源发送控制信息及参考信号；
    确定第二时频资源，所述第二时频资源没有控制信息发送；
    在所述第二时频资源上发送辅助参考信号,
    其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
  2. 根据权利要求1所述的辅助参考信号的发送方法，其中，在所述第二时频资源上发送辅助参考信号的步骤包括：
    在所述第一时频资源中，确定发送多个参考信号的物理资源块的多个第一位置，一个第一位置发送一个参考信号；
    在所述第二时频资源中，根据发送参考信号的物理资源块的第一位置，确定发送辅助参考信号的第二位置；
    在所述第二位置对应的物理资源块上发送辅助参考信号。
  3. 根据权利要求2所述的辅助参考信号的发送方法，其中，在所述第二时频资源中，根据发送参考信号的物理资源块的第一位置，确定发送辅助参考信号的第二位置的步骤包括：
    在所述第二时频资源中，将与多个第一位置分别相同的多个位置，全部确定为发送辅助参考信号的多个第二位置；或者
    在所述第二时频资源中，将与多个第一位置相同的多个位置中，将距离第一时频资源最近的多个位置，确定为发送辅助参考信号的第二位置。
    其中，在所述第二位置对应的物理资源块上发送辅助参考信号包括：
    在所述第二时频资源中确定的多个第二位置上，发送所述辅助参考信号。
  4. 根据权利要求1所述的辅助参考信号的发送方法，其中，
    在所述第一时频资源发送的参考信号和在所述第二时频资源发送的辅助参考信号统一生成，且所述统一参考信号序列是随着下列一项或多项参数变化而变化：所述小区ID、控制资源集合指示、子帧号和时隙号。
  5. 一种辅助参考信号的接收方法，包括：
    在发送控制信息的第一时频资源上接收参考信号；
    在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送，其中所述第一时频资源和所述第二时频资源属于同一个控制资源集合；
    根据所述参考信号以及所述辅助参考信号进行信道估计。
  6. 根据权利要求5所述的辅助参考信号的接收方法，其中，
    在所述第二时频资源中，接收辅助参考信号的物理资源块所在的多个第二位置，分别与接收参考信号的物理资源块所在的第一位置相同；或者
    在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位置，为距离第一位置最近的与第一位置相同的第二位置；或者
    在所述第二时频资源中，接收辅助参考信号的物理资源块所在的第二位置为全部与第一位置相同的第二位置。
  7. 一种网络侧设备，包括：
    确定模块，用于确定控制信道的第一时频资源和第二时频资源，所述第一时频资源发送控制信息及参考信号，所述第二时频资源没有控制信息发送；
    发送模块，用于在所述第二时频资源上发送辅助参考信号，
    其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
  8. 一种终端，包括：
    接收模块，用于在控制信道的发送控制信息的第一时频资源上接收参考信号；以及
    在所述第一时频资源相邻的第二时频资源上接收辅助参考信号，所述第二时频资源没有控制信息发送；
    处理模块，用于根据所述参考信号以及所述辅助参考信号进行信道估计，
    其中，所述第一时频资源和所述第二时频资源属于同一个控制资源集合。
  9. 一种网络侧设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如权利要求1至4中任一项所述的辅助参考信号的发送方法的步骤。
  10. 一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如权利要求5至6中任一项所述的辅助参考信号的接收方法的步骤。
  11. 一种计算机可读存储介质，其上存储有计算机程序，所述程序被处理器执行时，实现如权利要求1至4中任一项所述的辅助参考信号的发送方法的步骤。
  12. 一种计算机可读存储介质，其上存储有计算机程序，所述程序被处理器执行时，实现如权利要求5至6中任一项所述的辅助参考信号的接收方法的步骤。
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