WO2017028584A1 - 功率分配指示方法、相关设备和系统 - Google Patents

功率分配指示方法、相关设备和系统 Download PDF

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Publication number
WO2017028584A1
WO2017028584A1 PCT/CN2016/083239 CN2016083239W WO2017028584A1 WO 2017028584 A1 WO2017028584 A1 WO 2017028584A1 CN 2016083239 W CN2016083239 W CN 2016083239W WO 2017028584 A1 WO2017028584 A1 WO 2017028584A1
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Prior art keywords
power
power allocation
dmrs
allocation information
data transmission
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PCT/CN2016/083239
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English (en)
French (fr)
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金婧
童辉
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中国移动通信集团公司
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Publication of WO2017028584A1 publication Critical patent/WO2017028584A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473Wireless resource allocation based on the type of the allocated resource the resource being transmission power

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  • the present disclosure relates to the field of wireless communication technologies, and in particular, to a power allocation indication method, related devices (base stations and terminals), and a system.
  • the network-assisted interference cancellation technology refers to configuring an advanced receiver for the terminal, and using the interference information notified by the network side, combined with the self-blind detection, effectively deleting the interference to improve the receiving performance.
  • FIG. 1 and FIG. 2 respectively, wherein FIG. 1 is a schematic diagram of inter-cell interference, and FIG. 2 is a schematic diagram of network-assisted interference deletion.
  • the auxiliary information that the terminal needs to obtain from the network side in order to perform effective interference deletion includes the following two types:
  • Cell-Specific auxiliary information including system bandwidth, synchronization indication, and Cell ID (cell identity of neighboring cells), CRS Ports (Common Reference Signal Ports), and PA parameters and PB parameters. .
  • the other type is User-Specific auxiliary information, including CSI-RS (Channel Status Information Reference Signal), TM (Transmission Mode), and RI (Rank Indication). , PMI (Precoding Matrix Indicator), PA parameters, MCS (Modulation and Coding Scheme) DMRS Ports (DeModulation Reference Signal Ports), DMRS VCID (demodulation reference signal) Virtual cell identification), resource allocation type, and resource allocation granularity.
  • CSI-RS Channel Status Information Reference Signal
  • TM Transmission Mode
  • RI Rank Indication
  • PMI Precoding Matrix Indicator
  • PA parameters Precoding Matrix Indicator
  • MCS Modulation and Coding Scheme
  • DMRS Ports DeModulation Reference Signal Ports
  • DMRS VCID demodulation reference signal Virtual cell identification
  • resource allocation type resource allocation granularity.
  • R12 mainly studies the effective deletion of inter-cell interference
  • R13 mainly studies the interference deletion between multiple users in the multi-user superposition transmission (MUST) scenario.
  • the principle is: for the problem of inter-user interference in a multi-user overlapping transmission scenario,
  • the base station sends the interference information of the paired user to the terminal, and the auxiliary terminal receiver performs interference suppression to improve the overall performance of the network.
  • FIG. 3 it is a schematic diagram of a multi-user overlapping transmission application scenario.
  • the specific implementation manner is as follows: the remote UE (user equipment) uses high power transmission, and the near end UE uses small power transmission. The channel condition of the near-end UE is good. Even if the interference of the far-end user with high power transmission is experienced, the MUST technology can be used to delete the interference and estimate the useful signal (only the near-end user deletes the interference). Thereby achieving non-orthogonal multi-user transmission and improving system throughput.
  • the transmission modes in the UE-Specific related auxiliary information include: 6 CRS-based transmission modes (TM1 to TM6), and 4 DRS-based (Dedicated Reference Signals). ) / DMRS detection (DRS / DMRS-based) (TM7 ⁇ TM10).
  • the power is used to distinguish the paired users, and how to notify the paired users of the power allocation information has become one of the technical problems to be solved in the prior art.
  • power can be divided by multiple users.
  • two users in the same direction will be paired, and power matching is needed. Therefore, the split power method in the existing standards is no longer applicable.
  • DMRS-based transmission the same transmission mode can be adopted in combination with DMRS and data, and two paired users use different DMRS ports (DMRS ports) to directly obtain power allocation by using DMRS channel estimation.
  • DMRS ports DMRS ports
  • the embodiments of the present disclosure provide a power allocation indication method, a related apparatus, and a system, to improve DMRS channel estimation accuracy, and notify a paired user of a data transmission power allocated thereto by a network side.
  • the embodiment of the present disclosure provides a power allocation indication method, including:
  • the DMRS transmission parameter includes one or more of an antenna port, a scrambling code indication, and a flow number indication.
  • the power distribution information is sent to the paired user by using DCI signaling, which specifically includes:
  • the paired user is notified of the power allocation information by using the 2 bit data bits in the DCI signaling.
  • the power allocation information is a power allocation identifier represented by the 2 bit data bits, and each power allocation identifier corresponds to a preset power.
  • the predetermined power is determined in the following manner:
  • the predetermined power is determined based on a decibel value of the power difference.
  • the embodiment of the present disclosure provides a base station, including:
  • a transmission unit configured to transmit, to the paired user, the DMRS by using the same demodulation reference signal DMRS transmission parameter in multi-user overlapping transmission;
  • a notification unit configured to determine data transmission power allocated to each of the paired users, and notify the paired user of the power allocation information by using downlink control indication DCI signaling.
  • the DMRS transmission parameters include one or more of an antenna port, a scrambling code indication, and a flow number indication.
  • the notification unit is specifically configured to notify the paired user power allocation information by using 2 bit data bits in the DCI signaling.
  • the power allocation information is a power allocation identifier represented by the 2 bit data bits, and each power allocation identifier corresponds to a preset power.
  • the base station further includes:
  • a determining unit configured to determine the preset power with a power linear value as a distribution reference; or determine the preset power by a decibel value of the power difference.
  • the embodiment of the present disclosure further provides a method for power allocation indication implemented by a terminal side, including:
  • the receiving network side uses the downlink control to indicate the power allocation information notified by the DCI signaling;
  • the DMRS transmitted by the network side using the same demodulation reference signal DMRS transmission parameter is received using the data transmission power determined according to the power allocation information.
  • the power allocation indication method implemented by the terminal side further includes:
  • Data transmission is performed according to the DMRS channel estimation value and the data transmission power determined according to the power allocation information.
  • said power allocation information is a power allocation identifier represented by said 2 bit data bits
  • the embodiment of the present disclosure further provides a terminal, including:
  • a receiving unit configured to receive power allocation information that is notified by the network side by using a downlink control indication DCI signaling; and receive, by using the data transmission power determined according to the power allocation information, that the network side uses the same demodulation reference signal DMRS transmission parameter The DMRS transmitted.
  • the terminal further includes:
  • a channel estimation unit configured to perform channel estimation by using the DMRS transmission parameter to obtain a DMRS channel estimation value
  • a data transmission unit configured to perform data transmission according to the DMRS channel estimation value and the data transmission power determined according to the power allocation information.
  • the power allocation information is a power allocation identifier represented by the 2 bit data bit;
  • the terminal further includes:
  • a storage unit for pre-storing a power allocation table
  • a determining unit configured to search, according to the power allocation information, a power corresponding to the power allocation identifier from a power allocation table pre-stored by the storage unit as a data transmission power.
  • Embodiments of the present disclosure provide a power allocation indication system including the above-described base station and terminal.
  • the same DMRS transmission parameter transmits the DMRS to the paired user, so that the DMRS transmission power of each paired user can be guaranteed to be 1, thereby improving the DMRS channel estimation accuracy.
  • the DCI signaling can be used to notify the paired user of its own data transmission power, so that the paired user can correctly receive the DMRS transmitted by the network side using the same DMRS transmission parameter by using its own data transmission power.
  • FIG. 3 is a schematic diagram of a multi-user transmission scenario in the prior art
  • FIG. 4 is a schematic flowchart of an implementation process of a power allocation indication method performed by a network side in an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of an implementation process of a method for performing power allocation indication by a terminal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal in an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a power allocation indication system in an embodiment of the present disclosure.
  • the present disclosure provides a power allocation. Indicate methods, related equipment, and systems.
  • the principle of implementation of the present disclosure is as follows:
  • the DMRS is transmitted to the paired users using the same DMRS transmission parameters to ensure that the DMRS transmission power is 1, compared to the prior art, two DMRS ports are used to transmit DMRS, and two DMRSs are used.
  • the DMRS transmission scheme in which the sum of the powers of the port transmission DMRS is 1, for each paired user, the DMRS channel estimation accuracy can be improved by increasing the transmission power of the DMRS.
  • the power allocation information of each user in the paired user is notified to the user by using DCI signaling, so that the network receiving the same DMRS transmission can be accurately received according to the data transmission power allocated thereto.
  • DMRS for parameter transmission is notified to the user by using DCI signaling, so that the network receiving the same DMRS transmission can be accurately received according to the data transmission power allocated thereto.
  • a schematic flowchart of implementing a power allocation indication method for a network side base station may include the following steps:
  • the DMRS transmission parameters involved in the examples of the present disclosure may include, but are not limited to, an antenna port, a scrambling code indication, and a flow number indication, that is, transmitting the DMRS by using the same value in the antenna port, the scrambling code indication, and the flow number indication table.
  • the network side can transmit DMRS using DMRS port7.
  • the user reports channel state information to the network side base station, and the base station implements multi-user scheduling according to the channel state information reported by the user.
  • the base station may select UEs in the same direction for multi-user transmission.
  • the base station transmits the DMRS using the same DMRS transmission parameters for each of the paired users. In this way, it can be guaranteed that the DMRS transmission power of each user is 1.
  • Each user of the pairing uses the same transmission parameters for channel estimation to obtain the same DMRS channel estimate HW. Where H identifies the wireless channel and W represents the precoding matrix used by the user (the pairing user is the same).
  • S42 Determine data transmission power allocated to the paired users, and notify the paired user of the power allocation information by using DCI signaling.
  • the paired user can be notified of the transmission power allocation information by using the 2-bit data bit in the DCI (downlink control indication) signaling.
  • DCI downlink control indication
  • the step S42 may be performed before the step S41, or may be performed simultaneously with the step S41, which is not limited by the embodiment of the present disclosure.
  • the user pairing since the user pairing is dynamic, it can be dynamically changed in each downlink subframe. If the power allocation information is notified by means of higher layer signaling, the flexibility of pairing is affected. Considering pairing flexibility and downlink control information DCI (both downlink subframes have dynamic) overhead, etc., in the embodiment of the present disclosure, the paired users may be notified of the transmission power allocation information in the 2-bit data bits in the DCI information.
  • a 2 bit data bit may be added in the DCI signaling for transmitting power allocation information, or a 2 bit reserved data bit in the DCI signaling may be used to transmit power allocation information, and the power allocation information may be using the 2 bit data bit.
  • the indicated power allocation identifier In this way, the 2 bit data bits can be composed of four power allocation identifiers, namely 00, 01, 10, and 11, and each power allocation identifier corresponds to a preset power.
  • the paired user powers are: Pi and 1-Pi, respectively, where Pi is the data transmission power of one of the paired users, which is a preset power.
  • the preset power may be determined according to any of the following embodiments:
  • the predetermined power is determined based on a power linear value.
  • the power linear value may be used as a reference, and the step size is 0.05 or 0.1, as shown in Table 1 and Table 2, respectively.
  • the step size in Table 1 is 0.1
  • the step size in Table 2 is 0.05.
  • the predetermined power is determined based on a decibel value of the power difference.
  • the dB value of the power difference between the two users can be used as a reference, and the step size is 3 dB, as shown in Table 3:
  • the power allocation indication method provided by the embodiments of the present disclosure is also applicable to a CRS (CRS-based) based transmission mode.
  • the base station transmits the DMRS for the paired user by using the same DMRS transmission parameter, and ensures that the DMRS transmission power of each paired user is 1, and the sum of the DMRS transmission powers of the paired users is 1.
  • the DMRS transmission power of the paired user can be improved, thereby improving the estimation accuracy when the paired user performs the DMRS channel.
  • each paired user power allocation information may be notified by using 2 bit data bits in the DCI signaling, so that the paired user can accurately receive the DMRS transmitted by the network side using the same DMRS transmission parameter by using the power allocated thereto. .
  • the power allocation indication method provided by the embodiment of the present disclosure is implemented for the terminal side.
  • the receiving network side uses the downlink control to indicate the power allocation information notified by the DCI signaling.
  • the network side can transmit DMRS using DMRS port7.
  • the terminal can use the DMRS port 7 for channel estimation to obtain the DMRS estimation value HW.
  • H is the wireless channel
  • W is the precoding matrix used by the user (the same pairing user)
  • the network side may use the DCI signaling to notify the terminal power allocation information according to the foregoing step S42, and details are not described herein again.
  • the power allocation indication method implemented by the terminal side may further include the following steps:
  • Step 1 using the DMRS for channel estimation to obtain a DMRS channel estimation value
  • Step 2 Perform data transmission according to the obtained DMRS channel estimation value and the data transmission power determined according to the received power allocation information.
  • the power allocation information may be a power allocation identifier represented by the 2 bit data bits.
  • the terminal may pre-store the power allocation table locally, where the power allocation table may be as shown in Table 1, Table 2 or Table 3. Based on this, after receiving the power allocation information, the terminal can search for the power corresponding to the power allocation identifier from the pre-stored power allocation table as its own data transmission power.
  • a base station, a terminal, and a power allocation indication system are separately provided in the embodiments of the present disclosure. Since the principle of solving the problem in the foregoing device and system is similar to the power allocation indication method described above, the foregoing device is a system. Implementation can refer to the implementation of the method, and the repetition will not be repeated.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure, including:
  • the transmitting unit 61 is configured to transmit the DMRS to the paired user by using the same DMRS transmission parameter in the multi-user overlapping transmission;
  • the notification unit 62 is configured to determine data transmission power allocated to each of the paired users, and notify the paired user of the power allocation information by using DCI signaling.
  • the DMRS transmission parameter includes one or more of an antenna port, a scrambling code indication, and a flow number indication.
  • the notification unit 62 can be configured to notify the paired user of the power allocation information by using the 2 bit data bits in the DCI signaling.
  • the power allocation information may be a power allocation identifier represented by 2 bit data bits, and each power allocation identifier corresponds to a preset power.
  • the base station provided by the embodiment of the present disclosure may further include:
  • a determining unit (not shown) for determining the predetermined power with a power linear value as a distribution reference; or determining the predetermined power with a decibel value of the power difference.
  • a schematic structural diagram of a terminal provided by an embodiment of the present disclosure may include:
  • the receiving unit 71 is configured to receive power allocation information that is notified by the network side by using the DCI signaling, and receive, by using the data transmission power determined according to the power allocation information, the DMRS that is transmitted by the network side by using the same DMRS transmission parameter.
  • the terminal provided by the embodiment of the present disclosure may further include:
  • a channel estimation unit 72 configured to perform channel estimation by using the DMRS to obtain a DMRS channel estimation value
  • the data transmission unit 73 is configured to perform data transmission according to the DMRS channel estimation value and the data transmission power determined according to the power allocation information.
  • the power allocation information is a power allocation identifier represented by the 2 bit data bits.
  • the terminal provided by the embodiment of the present disclosure may further include a storage unit 74 and a determining unit 75, where:
  • the storage unit 74 is configured to pre-store a power allocation table
  • the determining unit 75 is configured to search, according to the power allocation information, the power corresponding to the power allocation identifier from the power allocation table pre-stored by the storage unit 74 as the data transmission power.
  • modules or units
  • the functions of the various modules (or units) may be implemented in one or more software or hardware in the implementation of the present disclosure.
  • a schematic structural diagram of a power distribution system includes a base station 81 shown in FIG. 6 and a terminal 82 shown in FIG.
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present disclosure can be used in One or more computer program products embodied on a computer usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • a computer usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本公开文本公开了一种功率分配指示方法、相关设备和系统,用以提高DMRS信道估计精度,并通知配对用户网络侧为其分配的数据传输功率。本公开文本实施例提供一种功率分配指示方法,包括:在多用户重叠传输中,利用相同的解调参考信号DMRS传输参数向配对用户传输DMRS;确定为所述配对用户各自分配的数据传输功率,并利用下行控制指示DCI信令通知所述配对用户功率分配信息。

Description

功率分配指示方法、相关设备和系统
相关申请的交叉参考
本申请主张在2015年8月19日在中国提交的中国专利申请号No.201510512176.X的优先权,其全部内容通过引用包含于此。
技术领域
本公开文本涉及无线通信技术领域,尤其涉及一种功率分配指示方法、相关设备(基站和终端)和系统。
背景技术
网络辅助干扰删除技术是指为终端配置先进接收机,利用网络侧通知的干扰信息,结合自身盲检,对干扰进行有效删除以提升接收性能。
分别如图1和图2所示,其中,图1为小区间干扰示意图,而图2为网络辅助干扰删除示意图。终端为了进行有效的干扰删除,需要从网络侧获取的辅助信息包括以下两类:
一类是小区级别(Cell-Specific)的辅助信息,包括系统带宽、同步指示以及Cell ID(邻区的小区标识)、CRS Ports(Common Reference Signal Ports,公共参考信号端口)以及PA参数和PB参数。
另一类是用户级别(User-Specific)的辅助信息,包括CSI-RS(Channel Status Information Reference Signal,信道状态信息参考信号)、TM(Transmission Mode,传输模式)、RI(Rank Indication,秩指示)、PMI(Precoding Matrix Indicator,预编码矩阵指示),PA参数、MCS(Modulation and Coding Scheme,调制与编码策略)DMRS Ports(DeModulation Reference Signal Ports,解调参考信号端口)、DMRS VCID(解调参考信号虚拟小区标识)、资源分配类型以及资源分配颗粒度等。
R12中主要研究小区间干扰的有效删除,R13中主要研究小区内多用户重叠传输(Multi-User Superposition Transmission,MUST)场景下多用户间的干扰删除问题。其原理为:针对多用户重叠传输场景下的用户间干扰问题, 基站下发配对用户的干扰信息给终端,辅助终端接收机进行干扰抑制,提升网络的整体性能。
R13中主要考虑将相同方向的用户进行配对,配对用户使用相同的预编码矩阵,这样可以避免用户盲检其配对用户的PMI,降低盲检复杂度。如图3所示,其为多用户重叠传输应用场景示意图。具体的实现方式为:远端UE(用户设备)使用大功率发送,近端UE使用小功率发送。近端UE的信道状况较好,即使体验到大功率发送的远端用户的干扰,也可以利用MUST技术对干扰进行删除,再估计自身有用信号(只有近端用户删除干扰)。从而实现非正交的多用户传输,提高系统的吞吐量。
3GPP R12版本中,对于UE-Specific相关的辅助信息中的传输模式包括:6种基于CRS检测(CRS-based)的传输模式(TM1~TM6),4种基于DRS(专用参考信号,Dedicated Reference Signal)/DMRS检测(DRS/DMRS-based)(TM7~TM10)。
MUST中通过功率区分配对用户,如何通知配对用户功率分配信息成为现有技术亟待解决的技术问题之一。现有标准中,可以由多个用户平分功率,然而在MUST场景下,将向同方向的远近两个用户进行配对,需要利用功率区分配对。因此,现有标准中的平分功率方式已不再适用。而针对DMRS-based传输,可以结合DMRS与数据采用相同发送方式的特点,两个配对用户使用不同DMRS port(DMRS端口),从而直接利用DMRS信道估计获得功率分配情况。但是由于两个DMRS port的总功率为1,尤其是对于近端用户,DMRS功率更小,影响了DMRS信道估计精度。
发明内容
(一)要解决的技术问题
本公开文本实施例提供一种功率分配指示方法、相关设备和系统,用以提高DMRS信道估计精度,并通知配对用户网络侧为其分配的数据传输功率。
(二)技术方案
为了实现上述目的,本公开文本提供如下技术方案:
本公开文本实施例提供了一种功率分配指示方法,包括:
在多用户重叠传输中,利用相同的解调参考信号DMRS传输参数向配对用户传输DMRS;以及
确定为所述配对用户各自分配的数据传输功率,并利用下行控制指示DCI信令向所述配对用户通知功率分配信息。
其中,所述DMRS传输参数包括天线端口、扰码指示和流数指示中一个或多个。
利用DCI信令向所述配对用户发送功率分配信息,具体包括:
利用所述DCI信令中的2bit数据位向所述配对用户通知功率分配信息。
优选的,所述功率分配信息为利用所述2bit数据位表示的功率分配标识,每一功率分配标识对应预先设定的功率。
所述预先设定的功率为按照以下方式确定出的:
以功率线性值为分配基准确定所述预先设定的功率;或者
以功率差的分贝值为分配基准确定所述预先设定的功率。
本公开文本实施例提供了一种基站,包括:
传输单元,用于在多用户重叠传输中,利用相同的解调参考信号DMRS传输参数向配对用户传输DMRS;以及
通知单元,用于确定为所述配对用户各自分配的数据传输功率,并利用下行控制指示DCI信令向所述配对用户通知功率分配信息。
所述DMRS传输参数包括天线端口、扰码指示和流数指示中的一个或多个。
优选的,所述通知单元,具体用于利用所述DCI信令中的2bit数据位通知所述配对用户功率分配信息。
所述功率分配信息为利用所述2bit数据位表示的功率分配标识,每一功率分配标识对应预先设定的功率。
所述基站,还包括:
确定单元,用于以功率线性值为分配基准确定所述预先设定的功率;或者以功率差的分贝值为分配基准确定所述预先设定的功率。
本公开文本实施例还提供了一种终端侧实施的功率分配指示方法,包括:
接收网络侧利用下行控制指示DCI信令通知的功率分配信息;以及
使用根据所述功率分配信息确定出的数据传输功率接收所述网络侧利用相同的解调参考信号DMRS传输参数传输的DMRS。
所述终端侧实施的功率分配指示方法,还包括:
利用所述DMRS传输参数进行信道估计得到DMRS信道估计值;以及
根据所述DMRS信道估计值和根据所述功率分配信息确定出的数据传输功率进行数据传输。
优选的,所述功率分配信息为利用所述2bit数据位表示的功率分配标识;以及
根据所述功率分配信息按照以下方法确定所述数据传输功率:
根据所述功率分配信息,从预先存储的功率分配表中查找所述功率分配标识对应的功率作为数据传输功率。
本公开文本实施例还提供了一种终端,包括:
接收单元,用于接收网络侧利用下行控制指示DCI信令通知的功率分配信息;以及使用根据所述功率分配信息确定出的数据传输功率接收所述网络侧利用相同的解调参考信号DMRS传输参数传输的DMRS。
所述终端,还包括:
信道估计单元,用于利用所述DMRS传输参数进行信道估计得到DMRS信道估计值;以及
数据传输单元,用于根据所述DMRS信道估计值和根据所述功率分配信息确定出的数据传输功率进行数据传输。
优选的,所述功率分配信息为利用所述2bit数据位表示的功率分配标识;
所述终端,还包括:
存储单元,用于预先存储功率分配表;以及
确定单元,用于根据所述功率分配信息,从所述存储单元预先存储的功率分配表中查找所述功率分配标识对应的功率作为数据传输功率。
本公开文本实施例提供一种功率分配指示系统,包括上述的基站和终端。
(三)有益效果
本公开文本实施例至少具有如下有益效果:
本公开文本实施例提供的功率分配指示方法、相关设备和系统,利用相 同的DMRS传输参数向配对用户传输DMRS,从而能够保证每一配对用户的DMRS传输功率为1,从而能够提高DMRS信道估计精度。同时,可以利用DCI信令通知配对用户其自身的数据传输功率,使得配对用户能够利用其自身的数据传输功率正确接收网络侧利用相同的DMRS传输参数传输的DMRS。
本公开文本的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本公开文本而了解。本公开文本的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
附图说明
为了更清楚地说明本公开文本实施例或现有技术中的技术方案,下面将对实施例或现有技术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文本的一些实施例,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。在附图(其不一定是按比例绘制的)中,相似的附图标记可在不同的视图中描述相似的部件。具有不同字母后缀的相似附图标记可表示相似部件的不同示例。附图以示例而非限制的方式大体示出了本文中所讨论的各个实施例。
图1为现有技术中,小区间干扰示意图;
图2为现有技术中,网络辅助干扰删除示意图;
图3为现有技术中,多用户传输场景示意图;
图4为本公开文本实施例中,网络侧实施功率分配指示方法的实施流程示意图;
图5为本公开文本实施例中,终端实施功率分配指示方法的实施流程示意图;
图6为本公开文本实施例中,基站的结构示意图;
图7为本公开文本实施例中,终端的结构示意图;以及
图8为本公开文本实施例中,功率分配指示系统的结构示意图。
具体实施方式
下面结合附图和实施例,对本公开文本的具体实施方式做进一步描述。以下实施例仅用于说明本公开文本,但不用来限制本公开文本的范围。
为使本公开文本实施例的目的、技术方案和优点更加清楚,下面将结合本公开文本实施例的附图,对本公开文本实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本公开文本的一部分实施例,而不是全部的实施例。基于所描述的本公开文本的实施例,本领域普通技术人员所获得的所有其他实施例,都属于本公开文本保护的范围。
除非另作定义,此处使用的技术术语或者科学术语应当为本公开文本所属领域内具有一般技能的人士所理解的通常意义。本公开文本专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。同样,“一个”或者“一”等类似词语也不表示数量限制,而是表示存在至少一个。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接,而是可以包括电性的连接,不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系,当被描述对象的绝对位置改变后,则该相对位置关系也相应地改变。
下面结合附图,对本公开文本实施例提供的一种业务报文的组播方法及装置的具体实施方式进行详细地说明。
为了提高DMRS信道估计精度以及将为配对用户分配的数据传输功率通知给各配对用户,使其能够正确接收网络侧利用相同的DMRS传输参数传输的DMRS,本公开文本实施例提供了一种功率分配指示方法、相关设备和系统。
以下结合说明书附图对本公开文本的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本公开文本,并不用于限定本公开文本,并且在不冲突的情况下,本公开文本中的实施例及实施例中的特征可以相互组合。
本公开文本实现原理如下:本公开文本实施例中,利用相同方向用户使 用MUST(多用户重叠传输)技术的特点,对配对用户使用相同的DMRS传输参数传输DMRS,保证DMRS传输功率为1,相比于现有技术中分别使用两个DMRS端口传输DMRS,两个DMRS端口传输DMRS的功率之和为1的DMRS传输方案,对于每一配对用户来说,由于提高了DMRS的传输功率,从而能够提高DMRS信道估计精度。另外,本公开文本实施例中,利用DCI信令将配对用户中、每一用户的功率分配信息通知给该用户,使得其可以根据为其分配的数据传输功率准确接收网络侧利用相同的DMRS传输参数传输的DMRS。
以下分别对网络侧和终端侧实施的功率分配指示方法的实施流程进行具体说明。
如图4所示,为网络侧基站实施功率分配指示方法的实施流程示意图,可以包括以下步骤:
S41、在多用户重叠传输中,利用相同的DMRS传输参数向配对用户传输DMRS。
较佳的,本公开文本示例涉及的DMRS传输参数可以但不限于包括天线端口、扰码指示和流数指示,即利用天线端口、扰码指示和流数指示表格中的同一个值来传输DMRS。例如,对于天线端口来说,网络侧可以利用DMRS port7传输DMRS。
具体实施时,用户向网络侧基站上报信道状态信息,基站根据用户上报的信道状态信息实现多用户调度。具体的,基站可以选择相同方向的UE进行多用户传输。基站对于配对用户中的每一用户,使用相同的DMRS传输参数传输DMRS。这样,可以保证每一用户的DMRS传输功率都为1。配对的每一用户使用相同的传输参数进行信道估计,得到相同的DMRS信道估计值HW。其中,H标识无线信道,W表示用户使用的预编码矩阵(配对用户相同)。
S42、确定为配对用户各自分配的数据传输功率,并利用DCI信令向配对用户通知功率分配信息。
较佳的,可以利用DCI(下行控制指示)信令中的2bit数据位向配对用户通知发送功率分配信息。
具体实施时,步骤S42可以先于步骤S41执行,也可以与步骤S41同时执行,本公开文本实施例对此不做限定。
具体实施时,由于用户配对是动态的,可以在每个下行子帧动态变化,如果利用高层信令的方式通知功率分配信息,则会影响配对的灵活性。考虑配对灵活性和下行控制信息DCI(每个下行子帧都有,动态的)开销等,本公开文本实施例中,可以在DCI信息中的2bit数据位向配对用户通知发送功率分配信息。
具体实施时,可以在DCI信令中新增2bit数据位用于传输功率分配信息,也可以利用DCI信令中的2bit保留数据位传输功率分配信息,功率分配信息可以为利用所述2bit数据位表示的功率分配标识。这样,2bit数据位可以组成4种功率分配标识,即00,01,10,11,每一功率分配标识对应预先设定的功率。
具体的,假设配对的用户总功率为1,则配对用户功率分别为:Pi和1-Pi,其中Pi为其中一个配对用户的数据传输功率,其为预先设定的功率。具体实施时,预先设定的功率可以为按照以下任一实施方式确定出的:
第一种实施方式、以功率线性值为分配基准确定所述预先设定的功率。
具体的,可以以功率线性值为基准,步长为0.05或0.1,分别如表1和表2所示。其中,表1中步长为0.1,表2中步长为0.05。
表1
Figure PCTCN2016083239-appb-000001
表2
Figure PCTCN2016083239-appb-000002
第二种实施方式、以功率差的分贝值为分配基准确定所述预先设定的功率。
具体的,可以以两用户功率差dB值为基准,步长为3dB,如表3所示:
表3
Figure PCTCN2016083239-appb-000003
需要说明的是,本公开文本实施例提供的功率分配指示方法亦适用于基于CRS(CRS-based)的传输模式中。
本公开文本实施例提供的功率分配指示方法中,基站利用相同的DMRS传输参数为配对用户传输DMRS,保证各配对用户的DMRS传输功率均为1,相比于配对用户的DMRS传输功率之和为1,能够提高配对用户DMRS传输功率,从而提高了配对用户进行DMRS信道时的估计精度。另外,本公开文本实施例中,可以利用DCI信令中的2bit数据位通知各配对用户功率分配信息,使得配对用户能够使用为其分配的功率准确接收网络侧利用相同的DMRS传输参数传输的DMRS。
如图5所示,为终端侧实施本公开文本实施例提供的功率分配指示方法 的实施流程示意图,包括以下步骤:
S51、接收网络侧利用下行控制指示DCI信令通知的功率分配信息。
S52、使用根据接收到的功率分配信息确定出的数据传输功率接收网络侧利用相同的DMRS传输参数传输的DMRS。
例如,对于天线端口来说,网络侧可以利用DMRS port7传输DMRS。相应的,终端可以使用DMRS port7进行信道估计得到DMRS估计值HW。其中H表示无线信道,W表示用户使用的预编码矩阵(配对用户相同)
具体实施时,网络侧可以按照上述步骤S42利用DCI信令通知终端功率分配信息,这里不再赘述。
具体实施时,终端侧实施的功率分配指示方法,还可以包括以下步骤:
步骤一、利用所述DMRS进行信道估计得到DMRS信道估计值;
步骤二、根据得到的DMRS信道估计值和根据接收到的功率分配信息确定出的数据传输功率进行数据传输。
较佳的,功率分配信息可以为利用所述2bit数据位表示的功率分配标识。具体实施时,终端可以在本地预先存储功率分配表,其中,功率分配表可以如表1、表2或者表3所示。基于此,终端在接收到功率分配信息后,可以从预先存储的功率分配表中查找功率分配标识对应的功率作为自身的数据传输功率。
基于同一发明构思,本公开文本实施例中还分别提供了一种基站、终端和功率分配指示系统,由于上述设备及系统解决问题的原理与上述的功率分配指示方法相似,因此上述设备即系统的实施可以参见方法的实施,重复之处不再赘述。
如图6所示,为本公开文本实施例提供的基站的结构示意图,包括:
传输单元61,用于在多用户重叠传输中,利用相同的DMRS传输参数向配对用户传输DMRS;以及
通知单元62,用于确定为配对用户各自分配的数据传输功率,并利用DCI信令向所述配对用户通知功率分配信息。
其中,所述DMRS传输参数包括天线端口、扰码指示和流数指示中的一个或多个。
较佳的,通知单元62可以用于利用DCI信令中的2bit数据位向配对用户通知功率分配信息。其中,功率分配信息可以为利用2bit数据位表示的功率分配标识,每一功率分配标识对应预先设定的功率。
具体实施时,本公开文本实施例提供的基站还可以包括:
确定单元(未示出),用于以功率线性值为分配基准确定所述预先设定的功率;或者以功率差的分贝值为分配基准确定所述预先设定的功率。
如图7所示,为本公开文本实施例提供的终端的结构示意图,可以包括:
接收单元71,用于接收网络侧利用DCI信令通知的功率分配信息以及使用根据所述功率分配信息确定出的数据传输功率接收所述网络侧利用相同的DMRS传输参数传输的DMRS。
具体实施时,本公开文本实施例提供的终端,还可以包括:
信道估计单元72,用于利用所述DMRS进行信道估计得到DMRS信道估计值;
数据传输单元73,用于根据所述DMRS信道估计值和根据所述功率分配信息确定出的数据传输功率进行数据传输。
较佳的,功率分配信息为利用所述2bit数据位表示的功率分配标识。本公开文本实施例提供的终端,还可以包括存储单元74和确定单元75,其中:
所述存储单元74,用于预先存储功率分配表;
所述确定单元75,用于根据所述功率分配信息,从所述存储单元74预先存储的功率分配表中查找所述功率分配标识对应的功率作为数据传输功率。
为了描述的方便,以上各部分按照功能划分为各模块(或单元)分别描述。当然,在实施本公开文本时可以把各模块(或单元)的功能在同一个或多个软件或硬件中实现。
如图8所示,为本公开文本实施例提供的功率分配系统的结构示意图,包括图6所示的基站81和图7所示的终端82。
本领域内的技术人员应明白,本公开文本的实施例可提供为方法、系统、或计算机程序产品。因此,本公开文本可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开文本可采用在 一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开文本是参照根据本公开文本实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本公开文本的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本公开文本范围的所有变更和修改。
显然,本领域的技术人员可以对本公开文本进行各种改动和变型而不脱离本公开文本的精神和范围。这样,倘若本公开文本的这些修改和变型属于本公开文本权利要求及其等同技术的范围之内,则本公开文本也意图包含这些改动和变型在内。

Claims (17)

  1. 一种功率分配指示方法,包括:
    在多用户重叠传输中,利用相同的解调参考信号DMRS传输参数向配对用户传输DMRS;以及
    确定为所述配对用户各自分配的数据传输功率,并利用下行控制指示DCI信令向所述配对用户通知功率分配信息。
  2. 如权利要求1所述的方法,其中,所述DMRS传输参数包括天线端口、扰码指示和流数指示中的一个或多个。
  3. 如权利要求1或2所述的方法,其中,利用DCI信令通知所述配对用户功率分配信息,具体包括:
    利用所述DCI信令中的2bit数据位向所述配对用户通知功率分配信息。
  4. 如权利要求3所述的方法,其中,所述功率分配信息为利用所述2bit数据位表示的功率分配标识,每一功率分配标识对应预先设定的功率。
  5. 如权利要求4所述的方法,其中,所述预先设定的功率为按照以下方式确定出的:
    以功率线性值为分配基准确定所述预先设定的功率;或者
    以功率差的分贝值为分配基准确定所述预先设定的功率。
  6. 一种基站,包括:
    传输单元,用于在多用户重叠传输中,利用相同的解调参考信号DMRS传输参数向配对用户传输DMRS;以及
    通知单元,用于确定为所述配对用户各自分配的数据传输功率,并利用下行控制指示DCI信令向所述配对用户通知功率分配信息。
  7. 如权利要求6所述的基站,其中,所述DMRS传输参数包括天线端口、扰码指示和流数指示中的一个或多个。
  8. 如权利要求6或7所述的基站,其中,
    所述通知单元,具体用于利用所述DCI信令中的2bit数据位向所述配对用户通知功率分配信息。
  9. 如权利要求8所述的基站,其中,所述功率分配信息为利用所述2bit 数据位表示的功率分配标识,每一功率分配标识对应预先设定的功率。
  10. 如权利要求9所述的基站,还包括:
    确定单元,用于以功率线性值为分配基准确定所述预先设定的功率;或者以功率差的分贝值为分配基准确定所述预先设定的功率。
  11. 一种功率分配指示方法,包括:
    接收网络侧利用下行控制指示DCI信令通知的功率分配信息;以及
    使用根据所述功率分配信息确定出的数据传输功率接收所述网络侧利用相同的解调参考信号DMRS传输参数传输的DMRS。
  12. 如权利要求11所述的方法,还包括:
    利用所述DMRS进行信道估计得到DMRS信道估计值;以及
    根据所述DMRS信道估计值和根据所述功率分配信息确定出的数据传输功率进行数据传输。
  13. 如权利要求11或12所述的方法,其中,所述功率分配信息为利用2bit数据位表示的功率分配标识;以及
    根据所述功率分配信息按照以下方法确定所述数据传输功率:
    根据所述功率分配信息,从预先存储的功率分配表中查找所述功率分配标识对应的功率作为数据传输功率。
  14. 一种终端,包括:
    接收单元,用于接收网络侧利用下行控制指示DCI信令通知的功率分配信息;以及使用根据所述功率分配信息确定出的数据传输功率接收所述网络侧利用相同的解调参考信号DMRS传输参数传输的DMRS。
  15. 如权利要求14所述的终端,还包括:
    信道估计单元,用于利用所述DMRS进行信道估计得到DMRS信道估计值;
    数据传输单元,用于根据所述DMRS信道估计值和根据所述功率分配信息确定出的数据传输功率进行数据传输。
  16. 如权利要求14或15所述的终端,其中,所述功率分配信息为利用2bit数据位表示的功率分配标识;
    所述终端还包括:
    存储单元,用于预先存储功率分配表;以及
    确定单元,用于根据所述功率分配信息,从所述存储单元预先存储的功率分配表中查找所述功率分配标识对应的功率作为数据传输功率。
  17. 一种功率分配指示系统,包括:
    权利要求6~10中任一项权利要求所述的基站;和
    权利要求14、15或16所述的终端。
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