WO2016161881A1 - 一种支持多用户叠加的ue、基站中的方法和设备 - Google Patents

一种支持多用户叠加的ue、基站中的方法和设备 Download PDF

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WO2016161881A1
WO2016161881A1 PCT/CN2016/076612 CN2016076612W WO2016161881A1 WO 2016161881 A1 WO2016161881 A1 WO 2016161881A1 CN 2016076612 W CN2016076612 W CN 2016076612W WO 2016161881 A1 WO2016161881 A1 WO 2016161881A1
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signaling
wireless signal
user
flag
base station
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PCT/CN2016/076612
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English (en)
French (fr)
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张晓博
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上海朗帛通信技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling

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  • the present invention relates to a scheduling scheme in a wireless communication system, and more particularly to a method and apparatus for control signaling for multi-user superposition based on Long Term Evolution (LTE-Long Term Evolution).
  • LTE-Long Term Evolution Long Term Evolution
  • the downlink wireless signals of multiple users are through ⁇ TDM (Time Division Multiplexing), FDM (Frequency Division Multiplexing). ), one or more of CDM (Code Division Multiplexing) is implemented.
  • a new research topic (RP-150496)-downlink multi-user overlay is introduced in 3GPP R (Release, Release) 13, which uses the difference in transmission power to distinguish the downlink wireless signals of two users.
  • the two users usually include a near user (ie, close to the base station) and a far user (ie, far from the base station), and the base station allocates a lower transmission power for the first signal for the near user, and is the first for the remote user.
  • the second signal distributes a higher transmit power.
  • the far user directly demodulates the second signal (that is, the first signal is treated as noise), and the near user first demodulates the second signal (taking into account that the near-user farther user has lower path loss, the probability of successful decoding is high. And then removing the influence of the second signal from the received signal to obtain a residual signal, and decoding the remaining signal to obtain a first signal, which is an SIC (Successive Interference Cancellation) algorithm.
  • SIC Successessive Interference Cancellation
  • the specific implementation manner of the foregoing SIC algorithm is determined by the UE (User Equipment) manufacturer.
  • the near UE or the far UE can use the IRC (Interference Rejection Combining) algorithm to whiten the superimposed wireless signal to improve the receiving performance.
  • the IRC algorithm does not require the UE to correctly decode the interfering wireless signal, and only needs to estimate the channel parameters of the interfering wireless signal.
  • PDCCH Physical Downlink
  • the control information of the PDSCH is obtained by the DCI (Downlink Control Information) transmitted in the EPDCCH (Enhanced PDCCH).
  • DCI Downlink Control Information
  • EPDCCH Enhanced PDCCH
  • the UE performs BD (Blind Decoding) to determine the corresponding PDCCH or EPDCCH. Therefore, the number of BDs that the UE performs at most is increased with the number of DCI load sizes that the UE needs to monitor.
  • the base station configures the TM (Transmission Mode) for the UE through the high layer signaling. Transmission mode), for each TM, the UE only needs to detect two DCI load sizes.
  • the base station adds extra bits to the scheduled DCI of the first signal (for the near user) that is used to carry information related to the second signal.
  • the UE should be able to dynamically switch between multi-user superposition state and non-multi-user superposition state, and multi-user superimposed UE pairing can be dynamically scheduled. Therefore, the above intuitive method may face the following problems:
  • the load size of the scheduled DCI of the first signal may be up to 4 types - 2 types of multi-user superimposed state and non-multi-user superimposed state, so the maximum number of BDs supported by the UE is doubled, increasing The complexity of the UE.
  • the present invention provides a solution. It should be noted that, in the case of no conflict, the features in the embodiments and embodiments in the UE of the present application can be applied to the base station, and vice versa. Further, the features of the embodiments and the embodiments of the present application may be combined with each other arbitrarily without conflict.
  • the invention discloses a method in a UE supporting multi-user superposition, which comprises the following steps:
  • Step A Receive first signaling, the first signaling comprising a first flag.
  • Step B Receive the first wireless signal.
  • the first signaling is physical layer signaling, and the first flag indicates whether the UE detects the second signaling, where the first wireless signal is scheduled by the first signaling.
  • the UE detects the second signaling is irrelevant (ie, does not change with the state of the first flag bit).
  • the second signaling is used to indicate information of the wireless signal superimposed with the first wireless signal.
  • the above method ensures that the load size of the first signaling does not vary with "whether the first wireless signal is superimposed with other wireless signals", so the UE does not need to perform additional BDs for the first signaling.
  • the first flag ensures that the UE should be able to dynamically switch between the multi-user overlay state and the non-multi-user overlay state, supporting dynamic scheduling of multi-user overlays.
  • the step A further includes the following step A1:
  • Step A1 Receive second signaling, the second signaling indicating scheduling information of the second wireless signal.
  • the first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal.
  • the occupied time-frequency resources overlap in whole or in part.
  • step B further includes the following step B1:
  • Step B1 Receive (and correctly decode) the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.
  • the above embodiment can completely eliminate the interference of the second wireless signal (regardless of the channel estimation error), but requires the UE to perform channel decoding on the second wireless signal and reconstruct the second wireless signal, which is high in complexity.
  • step B further includes the following step B2:
  • Step B2 Receiving the second wireless signal (not decoding, performing a hard decision on the constellation point symbol of the second wireless signal), and canceling the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.
  • the above embodiment is less complex, but may cause the interference of the second wireless signal to not be completely eliminated.
  • the load size of the second signaling is equal to the load size of the DCI format 1A monitored by the UE for scheduling the target carrier, and the target carrier is the transmission carrier of the first wireless signal.
  • DCI format 1A is a DCI format supported by all transmission modes, so the above embodiment ensures that the UE does not need to perform additional BDs for the second signaling.
  • the second signaling is in CSS (Common Search Space, public search) Transmission in cable space).
  • CSS Common Search Space, public search
  • the second signaling is transmitted in a USS (UE Specific Search Space).
  • USS UE Specific Search Space
  • the step A further includes the following steps:
  • the first higher layer signaling indicating at least one of the following:
  • the location of the scheduling information of the second wireless signal in the second signaling is the location of the scheduling information of the second wireless signal in the second signaling.
  • the second signaling is transmitted in the CSS, the second signaling includes K group scheduling information, and the first high layer signaling indicates an index of the scheduling information of the second wireless signal in the K group scheduling information.
  • the first wireless signal and the second wireless signal are both transmitted on a PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • the association identifier is an RNTI (Radio Network Temporary Identity).
  • RNTI Radio Network Temporary Identity
  • the association identifier is used to determine a ⁇ CRC (Cyclic Redundancy Check) scrambling code corresponding to the physical layer signaling, and a PDCCH (Physical Downlink Control Channel) UE-specific search.
  • ⁇ CRC Cyclic Redundancy Check
  • PDCCH Physical Downlink Control Channel
  • the scheduling information includes at least one of the following:
  • TPMI Transmitted Precoding Matrix Indicator
  • the transport block related information includes X sets of transport block information, and one set of transport block information corresponds to one transport block, and the transport block information includes ⁇ MCS (Modulation and Coding Scheme, Modulation coding mode), at least MCS in NDI (New Data Indicator), RV (Redundancy Version).
  • MCS Modulation and Coding Scheme, Modulation coding mode
  • NDI New Data Indicator
  • RV Redundancy Version
  • the CRS/URS flag is used to indicate whether the second wireless signal is transmitted by the CRS antenna port or by the URS antenna port.
  • the signaling format is a DCI (Downlink Control Information) format.
  • DCI Downlink Control Information
  • the URS related information includes an Antenna port (s), a scrambling identity, a number of layers, and the URS related information is represented by three information bits. Instructions.
  • the antenna port of the URS includes one or more of antenna ports ⁇ 7, 8, 9, 10, 11, 12, 13, 14 ⁇ .
  • a demodulation RS (Reference Signal) of the second radio signal is a CRS
  • the power related information is an OFDM (Orthogonal Frequency Division Multiplexing) in which the second radio signal does not include a CRS.
  • the demodulation RS of the second wireless signal is an associated URS with the first wireless signal
  • the power related information is an OFDM (Orthogonal Frequency Division Multiplexing) of the second wireless signal that does not include the CRS.
  • the EPRE (Energy Per Resource Element) on the symbol is compared to the EPRE of the associated URS.
  • the step B further includes the following step B2:
  • Step B2 It is assumed that there is no superimposed wireless signal on the time-frequency resource occupied by the first wireless signal.
  • the first flag bit in the first signaling indicates that the UE does not detect the second signaling.
  • the specific implementation of the step B2 is determined by the terminal manufacturer.
  • the UE receives the first wireless signal by using an MMSE (Minimum Mean-Squared Error) algorithm.
  • MMSE Minimum Mean-Squared Error
  • the influence of the first wireless signal is subtracted from the received signal, and the remaining signal is used to determine the background noise.
  • the invention discloses a method in a base station supporting multi-user superposition, wherein Next steps:
  • the first signaling includes a first flag bit.
  • Step B Send the first wireless signal.
  • the first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, where the first wireless signal is scheduled by the first signaling.
  • the step A further includes the following step A1, the step B further comprising the following step B1.
  • Step A1 Sending second signaling, the second signaling indicating scheduling information of the second wireless signal.
  • Step B1 Send a second wireless signal.
  • the first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal.
  • the occupied time-frequency resources overlap in whole or in part.
  • the transmitting serving cell of the first signaling only transmits the first wireless signal on the time-frequency resource occupied by the first wireless signal.
  • the serving serving cell of the first signaling is maintained by the base station.
  • the first flag bit in the first signaling indicates that the target UE of the first signaling does not detect the second signaling.
  • the step A further includes the following steps:
  • Step A0 Sending the first higher layer signaling, the first higher layer signaling indicating at least one of the following:
  • the location of the scheduling information of the second wireless signal in the second signaling is the location of the scheduling information of the second wireless signal in the second signaling.
  • the scheduling information includes at least one of the following:
  • the invention discloses a user equipment supporting multi-user overlay, wherein the following modules are included:
  • the first module is configured to receive the first signaling, where the first signaling includes a first flag bit.
  • the second module is configured to receive the first wireless signal.
  • the first signaling is physical layer signaling, and the first flag indicates whether the UE detects the second signaling, where the first wireless signal is scheduled by the first signaling.
  • the foregoing user equipment is characterized by:
  • the first module is further configured to receive second signaling, and the second signaling is to indicate scheduling information of the second wireless signal.
  • the second module is further configured to receive the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.
  • the first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal.
  • the occupied time-frequency resources overlap in whole or in part.
  • the invention discloses a base station device supporting multi-user superposition, wherein the following modules are included:
  • the first module is configured to send the first signaling, where the first signaling includes a first flag bit.
  • the second module is configured to send the first wireless signal.
  • the first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, where the first wireless signal is scheduled by the first signaling.
  • the foregoing base station device is characterized by:
  • the first module is further configured to send second signaling, where the second signaling indicates scheduling information of the second wireless signal.
  • the second module is also for transmitting a second wireless signal.
  • the first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal.
  • the occupied time-frequency resources overlap in whole or in part.
  • the present invention has the following technical advantages:
  • FIG. 1 shows a flow chart of scheduling of downlink multi-user overlays in accordance with one embodiment of the present invention
  • FIG. 2 illustrates a flow chart for determining whether to receive second signaling according to a first flag bit, in accordance with an embodiment of the present invention
  • FIG. 3 shows a schematic diagram of second signaling including K-group scheduling information, in accordance with one embodiment of the present invention
  • FIG. 4 shows a schematic diagram of second signaling including a set of scheduling information, in accordance with one embodiment of the present invention
  • FIG. 5 is a block diagram showing the structure of a processing device in a UE according to an embodiment of the present invention.
  • FIG. 6 is a block diagram showing the structure of a processing device in a base station according to an embodiment of the present invention.
  • Embodiment 1 illustrates a scheduling flowchart of downlink multi-user overlay, as shown in FIG.
  • base station N1 is a maintenance base station for the serving cells of UE U2 and UE U3, wherein the steps in block F1 are optional steps.
  • the first signaling is sent in step S11, and the first signaling includes the first flag bit.
  • the second signaling is sent in step S12, and the second signaling indicates scheduling information of the second wireless signal.
  • the first wireless signal and the second wireless signal are transmitted in step S13.
  • the first signaling is received in step S21.
  • the second signaling is received in step S22.
  • the second wireless signal is received in step S23, the interference caused by the second wireless signal is cancelled from the time-frequency resource occupied by the first wireless signal, and then the first wireless signal is received.
  • a second wireless signal is received in step S31.
  • the first signaling is physical layer signaling
  • the first flag bit includes 1 bit, which is used to indicate whether the UE U2 detects the second signaling, and the first wireless signal is scheduled by the first signaling.
  • the first flag bit in the first signaling indicates that the UE detects the second signaling
  • the second signaling is The physical layer signaling, the time-frequency resource occupied by the first wireless signal and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap.
  • the first wireless signal and the second wireless signal are respectively transmitted on the PDSCH.
  • the first radio signal and the second radio signal occupy the same frequency domain resource, and the scheduling information does not include information bits for frequency domain resource allocation (ie, UE U2 according to the first signaling)
  • the information bits used for frequency domain resource allocation determine the frequency domain resources occupied by the first wireless signal.
  • the base station N1 transmits the first higher layer signaling in step S10, and the UE U2 receives the first higher layer signaling in step S20.
  • the first higher layer signaling indicates at least one of the following:
  • the location of the scheduling information of the second wireless signal in the second signaling is the location of the scheduling information of the second wireless signal in the second signaling.
  • the first high layer signaling is RRC (Radio Resource Control) signaling or MAC (Medium Access Control) signaling.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • Embodiment 2 exemplifies a flowchart for judging whether or not to receive the second signaling according to the first flag bit, as shown in FIG. Embodiment 2 is an operation flow on the UE side.
  • the UE receives the first signaling in step S111, where the first signaling includes a first flag bit. It is determined in step S112 whether the first flag bit indicates that the UE detects the second signaling. If so, the second signaling is received in step S113, the interference of the second wireless signal is cancelled from the received signal in step S114, and then step S115 is performed. If not, the first wireless signal is received in step S115.
  • the first signaling is physical layer signaling, and the first wireless signal is scheduled by the first signaling.
  • the second signaling is physical layer signaling, and the time-frequency resources occupied by the first wireless signal and the time-frequency resources occupied by the second wireless signal are all or partially overlapped.
  • the second signaling indicates scheduling information of the second wireless signal.
  • the UE assumes that there is no superimposed wireless signal on the time-frequency resource occupied by the first wireless signal.
  • Embodiment 3 exemplifies a second signaling including K group scheduling information, as shown in FIG.
  • the second signaling in the present invention includes the K group of the scheduling information in the present invention, and the scheduling information of the second wireless signal in the present invention is the first one in FIG. A group of K group scheduling information.
  • the first high layer signaling in the present invention indicates an index of scheduling information of the second wireless signal in the first to Kth group scheduling information.
  • the second signaling is transmitted in the CSS.
  • the scheduling information includes an MCS.
  • the scheduling information includes a CRS/URS flag bit, or a signaling format of scheduling signaling of the second wireless signal.
  • Embodiment 4 illustrates a schematic diagram of second signaling including a set of scheduling information, as shown in FIG.
  • the second signaling in the present invention includes a set of the scheduling information in the present invention, and (optionally) padding bits. If the number of information bits occupied by a set of scheduling information is equal to the payload size of a given DCI (ie, the number of bits not including the CRC), the padding bits are not included in the second signaling. If the number of information bits occupied by a set of scheduling information is less than the load size of a given DCI, the padding bits are included in the second signaling. The load size of the second signaling is equal to the load size of the given DCI.
  • the given DCI is a DCI format 1A for monitoring a transmission carrier of a first wireless signal in the present invention monitored by a target UE of the first signaling in the present invention, Or DCI 1C.
  • the given DCI is the first signaling.
  • the scheduling information includes:
  • the second wireless signal is transmitted by the CRS antenna port and adopts a transmission mode of transmission diversity, or the second wireless signal is transmitted by the URS antenna port and adopts one of the antenna ports ⁇ 7, 8 ⁇ or Two.
  • Embodiment 5 exemplifies a structural block diagram of a processing device in one UE, as shown in FIG. Attached In FIG. 5, the UE processing apparatus 200 is mainly composed of a first receiving module 201 and a second receiving module 202.
  • the first receiving module 201 is configured to receive the first signaling, where the first signaling includes a first flag bit.
  • the second receiving module 202 is configured to receive the first wireless signal.
  • Embodiment 5 The first signaling is a scheduling DCI of the first wireless signal, and the first flag bit indicates whether the UE detects the second signaling.
  • the second signaling is DCI.
  • the first receiving module 201 is further configured to receive the second signaling, where the second signaling indicates the scheduling information of the second wireless signal.
  • the second receiving module 202 is further configured to receive the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.
  • the time-frequency resource occupied by the first wireless signal and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap.
  • the scheduling information includes:
  • Embodiment 6 exemplifies a structural block diagram of a processing device in a base station, as shown in FIG.
  • the base station processing apparatus 300 is mainly composed of a first transmitting module 301 and a second transmitting module 302.
  • the first sending module 301 is configured to send the first signaling, where the first signaling includes a first flag bit.
  • the second sending module 302 is configured to send the first wireless signal.
  • the first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, and the first wireless signal is scheduled by the first signaling.
  • the first sending module 301 is further configured to send the second signaling, where the second signaling indicates the scheduling information of the second wireless signal.
  • the second sending module 302 is further configured to send the second wireless signal.
  • the second signaling is physical layer signaling, and the time-frequency resources occupied by the first wireless signal and the time-frequency resources occupied by the second wireless signal are all or partially overlapped.
  • the first sending module 301 is further configured to send MAC signaling.
  • the associated RNTI indicating the second signaling, the RRC signaling is sent to indicate the location of the scheduling information of the second wireless signal in the second signaling.
  • the first signaling is one of DCI formats ⁇ 1, 1A, 1B, 2, 2A, 2B, 2C ⁇ (with the first flag added).
  • each module unit in the above embodiment may be implemented in hardware form or in the form of a software function module.
  • the application is not limited to any specific combination of software and hardware.
  • the UE in the present invention includes, but is not limited to, a wireless communication device such as a mobile phone, a tablet computer, a notebook, and an internet card.
  • the base station in the present invention includes, but is not limited to, a macro communication base station, a micro cell base station, a home base station, a relay base station, and the like.

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Abstract

本发明公开了一种支持多用户叠加的UE、基站中的方法和设备。UE在步骤一中接收第一信令，第一信令中包括第一标志位。在步骤二中接收第一无线信号。其中，第一信令是物理层信令，所述第一标志位指示所述UE是否检测第二信令，第一无线信号由第一信令所调度。本发明确保了UE应当能在多用户叠加状态和非多用户叠加状态动态切换，支持动态调度的多用户叠加。此外，本发明降低了UE执行BD的次数，降低了UE的复杂度，同时避免了过多的BD次数导致的虚警增加。

Description

一种支持多用户叠加的UE、基站中的方法和设备 技术领域
本发明涉及无线通信***中的调度方案，特别是涉及基于长期演进(LTE-Long Term Evolution)的针对多用户叠加(Superposition)的控制信令的方法和装置。
背景技术
传统的3GPP(3rd Generation Partner Project，第三代合作伙伴项目)蜂窝***中，多用户的下行无线信号是通过{TDM(Time Division Multiplexing，时分复用)，FDM(Frequency Division Multiplexing，频分复用)，CDM(Code Division Multiplexing，码分复用)}中的一种或者多种方式来实现。3GPP R(Release，版本)13中引入了一个新的研究课题(RP-150496)-下行多用户叠加，即利用发送功率的不同区分两个用户的下行无线信号。所述两个用户通常包括一个近用户(即距离基站近)和一个远用户(即距离基站远)，基站为针对近用户的第一信号分配较低的发送功率，同时为针对远用户的第二信号分配较高的发送功率。远用户直接解调第二信号(即将第一信号当噪声处理)，而近用户首先解调第二信号(考虑到近用户较远用户具备更低的路径损耗，译码成功的可能性很高)，然后从接收信号中去除第二信号的影响得到剩余信号，对剩余信号译码获得第一信号，这就是SIC(Successive Interference Cancellation，连续干扰消除)算法。为了执行SIC，近用户需要获得第一信号和第二信号的调度信息-而远用户只需要获得第二信号的调度信息。
需要说明的是，上述SIC算法的具体实现方式由UE(User Equipment，用户设备)厂商自行确定。而作为一种SIC的替代或者补充方案，近UE(或者远UE)能够采用IRC(Interference Rejection Combining，干扰抑制合并)算法对叠加的无线信号进行白化操作，以提高接收性能。IRC算法不要求UE正确译码干扰无线信号，只需要估计干扰无线信号的信道参数即可。
传统的LTE动态调度中，用户根据在PDCCH(Physical Downlink  Control Channel，物理下行控制信道)或者EPDCCH(Enhanced PDCCH，增强的PDCCH)中传输的DCI(Downlink Control Information，下行控制信息)获得PDSCH(Physical Downlink Shared Channel，物理下行控制信道)的调度信息。对于一种DCI负载尺寸(Payload Size)，UE执行BD(Blind Decoding，盲译码)以确定相应的PDCCH或者EPDCCH。因此，UE最多执行的BD次数随着UE所需要监测的DCI负载尺寸数而增加，为了降低过多的BD次数导致的UE复杂度的增加，基站通过高层信令为UE配置TM(Transmission Mode，传输模式)，对于每一种TM，UE仅需检测两种DCI负载尺寸。
对于多用户叠加，一个直观的想法是基站在(针对近用户的)第一信号的调度DCI中增添额外的比特，所述额外的比特用于承载和第二信号相关的信息。
发明内容
发明人通过研究发现，为了获得调度增益，UE应当能在多用户叠加状态和非多用户叠加状态动态切换，并且多用户叠加的UE配对是能够动态调度的。因此，上述直观的方法可能会面临如下问题：
-.对于给定TM，第一信号的调度DCI的负载尺寸可能多达4种-多用户叠加状态和非多用户叠加状态各2种，因此UE所支持的最大BD次数提高了一倍，增加了UE的复杂度。
针对上述问题，本发明提供了解决方案。需要说明的是，在不冲突的情况下，本申请的UE中的实施例和实施例中的特征可以应用到基站中，反之亦然。进一步的，在不冲突的情况下，本申请的实施例和实施例中的特征可以任意相互组合。
本发明公开了一种支持多用户叠加的UE中的方法，其中,包括如下步骤：
-步骤A.接收第一信令，第一信令中包括第一标志位。
-步骤B.接收第一无线信号。
其中，第一信令是物理层信令，所述第一标志位指示所述UE是否检测第二信令，第一无线信号由第一信令所调度。
作为一个实施例，第一信令中除去第一标志位的其他信息比特和所 述UE是否检测第二信令无关(即不随第一标志位的状态而发生变化)。
第二信令用于指示和第一无线信号相叠加的无线信号的信息。上述方法确保了第一信令的负载尺寸不随“第一无线信号是否和其他无线信号相叠加”而变化，因此所述UE不需要针对第一信令执行额外的BD。
第一标志位确保了UE应当能在多用户叠加状态和非多用户叠加状态动态切换，支持动态调度的多用户叠加。
具体的，根据本发明的一个方面，所述步骤A还包括如下步骤A1：
-步骤A1.接收第二信令，第二信令指示第二无线信号的调度信息。
其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
如何根据第二信令处理第二无线信号有多种实现方法，下面两个实施例描述了两种可能的方法。
作为上述方面的一个实施例，所述步骤B还包括如下步骤B1：
-步骤B1.接收(并正确译码)第二无线信号，从第一无线信号所占用的时频资源上消除第二无线信号带来的干扰。
上述实施例能够(不考虑信道估计误差)完全消除第二无线信号的干扰，然而要求所述UE对第二无线信号执行信道译码并重构第二无线信号，复杂度较高。
作为上述方面的一个实施例，所述步骤B还包括如下步骤B2：
-步骤B2.接收第二无线信号(不译码，对第二无线信号的星座点符号执行硬判决)，从第一无线信号所占用的时频资源上消除第二无线信号带来的干扰。
上述实施例复杂度较低，但是可能导致第二无线信号的干扰未被完全消除。
作为一个实施例，第二信令的负载尺寸等于所述UE监测的用于调度目标载波的DCI格式1A的负载尺寸，所述目标载波是第一无线信号的传输载波。
DCI格式1A是所有传输模式都支持的DCI格式，因此上述实施例确保了所述UE不需针对第二信令执行额外的BD。
作为一个实施例，第二信令在CSS(Common Search Space，公共搜 索空间)中传输。
作为一个实施例，第二信令在USS(UE specific Search Space，UE特定的搜索空间)中传输。
具体的，根据本发明的上述方面，所述步骤A还包括如下步骤：
-步骤A0.接收第一高层信令，第一高层信令指示以下至少之一：
-.第二信令的关联标识
-.第二无线信号的调度信息在第二信令中的位置。
作为一个实施例，第二信令在CSS中传输，第二信令包括K组调度信息，第一高层信令指示第二无线信号的调度信息在所述K组调度信息中的索引。
作为一个实施例，第一无线信号和第二无线信号都在PDSCH(Physical Downlink Shared Channel，物理下行共享信道)上传输。
作为一个实施例，所述关联标识是RNTI(Radio Network Temporary Identity，无线网络暂定标识)。
作为一个实施例，所述关联标识用于确定对应物理层信令的{CRC(Cyclic Redundancy Check，循环冗余校验)扰码，PDCCH(Physical Downlink Control Channel，物理下行控制信道)UE特定的搜索空间，EPDCCH(Enhanced PDCCH，增强的物理下行共享信道)UE特定的搜索空间}中的一种或者多种。
具体的，根据本发明的上述方面，所述调度信息包括以下至少之一:
-.传输块相关信息
-.HARQ(Hybrid Automatic Repeat reQuest，混合自动重传请求)进程号(Process Number)
-.CRS(Cell Reference Signal，小区参考信号)/URS(UE-specific Reference Signal，UE特定的参考信号)标志位，或者第二无线信号的调度信令的信令格式
-.URS相关信息，或者TPMI(Transmitted Precoding Matrix Indicator，发送的预编码矩阵指示)
-.功率相关信息。
所述传输块相关信息包括X组传输块信息，一组传输块信息对应一个传输块，所述传输块信息包括{MCS(Modulation and Coding Scheme， 调制编码方式)，NDI(New Data Indicator，新数据指示)，RV(Redundancy Version，冗余版本)}中的至少MCS。
所述CRS/URS标志位用于指示第二无线信号是由CRS天线端口发送还是由URS天线端口发送。
作为一个实施例，所述信令格式是DCI(Downlink Control Information，下行控制信息)格式。
作为一个实施例，所述URS相关信息包括{天线端口(Antenna port(s))，扰码标识(scrambling identity)，层数(number of layers)}，所述URS相关信息由三个信息比特所指示。
作为一个实施例，所述URS的天线端口包括天线端口{7，8，9，10，11，12，13，14}中的一个或者多个。
作为一个实施例，第二无线信号的解调RS(Reference Signal，参考信号)是CRS，所述功率相关信息是第二无线信号在不包含CRS的OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号上的EPRE(Energy Per Resource Element，每资源粒子上的能量)相比CRS的EPRE的比值。
作为一个实施例，第二无线信号的解调RS是和第一无线信号的关联URS，所述功率相关信息是第二无线信号在不包含CRS的OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号上的EPRE(Energy Per Resource Element，每资源粒子上的能量)相比所述关联URS的EPRE的比值。
具体的，根据本发明的一个方面，所述步骤B还包括如下步骤B2：
-步骤B2.假定第一无线信号所占用的时频资源上不存在叠加的无线信号。
其中，第一信令中的所述第一标志位指示所述UE不检测第二信令。
所述步骤B2的具体实施方式由终端厂商自行确定。作为一个实施例，所述UE采用MMSE(Minimum Mean-Squared Error,最小均方误差)算法接收第一无线信号。作为一个实施例，所述UE正确译码第一无线信号之后，从接收到的信号中减去第一无线信号的影响，利用剩余的信号确定背景噪声。
本发明公开了一种支持多用户叠加的基站中的方法，其中,包括如 下步骤：
-步骤A.发送第一信令，第一信令中包括第一标志位。
-步骤B.发送第一无线信号。
其中，第一信令是物理层信令，所述第一标志位指示第一信令的目标UE是否检测第二信令，第一无线信号由第一信令所调度。
具体的，根据本发明的一个方面，所述步骤A还包括如下步骤A1，所述步骤B还包括如下步骤B1。
-步骤A1.发送第二信令，第二信令指示第二无线信号的调度信息。
-步骤B1.发送第二无线信号。
其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
具体的，根据本发明的一个方面，第一信令的发送服务小区在第一无线信号所占用的时频资源上只发送第一无线信号。其中，第一信令的发送服务小区由所述基站维持。
其中，第一信令中的所述第一标志位指示第一信令的目标UE不检测第二信令。
具体的，根据本发明的一个方面，所述步骤A还包括如下步骤：
-步骤A0.发送第一高层信令，第一高层信令指示以下至少之一：
-.第二信令的关联标识
-.第二无线信号的调度信息在第二信令中的位置。
具体的，根据本发明的一个方面，所述调度信息包括以下至少之一:
-.传输块相关信息
-.HARQ进程号
-.CRS/URS标志位，或者第二无线信号的调度信令的信令格式
-.URS相关信息，或者TPMI
-.功率相关信息。
本发明公开了一种支持多用户叠加的用户设备，其中,包括如下模块：
第一模块：用于接收第一信令，第一信令中包括第一标志位。
第二模块：用于接收第一无线信号。
其中，第一信令是物理层信令，所述第一标志位指示所述UE是否检测第二信令，第一无线信号由第一信令所调度。
作为一个实施例，上述用户设备的特征在于：
第一模块还用于接收第二信令，第二信令指示第二无线信号的调度信息。
第二模块还用于接收第二无线信号，从第一无线信号所占用的时频资源上消除第二无线信号带来的干扰。
其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
本发明公开了一种支持多用户叠加的基站设备，其中,包括如下模块：
第一模块：用于发送第一信令，第一信令中包括第一标志位。
第二模块：用于发送第一无线信号。
其中，第一信令是物理层信令，所述第一标志位指示第一信令的目标UE是否检测第二信令，第一无线信号由第一信令所调度。
作为一个实施例，上述基站设备的特征在于：
第一模块还用于发送第二信令，第二信令指示第二无线信号的调度信息。
第二模块还用于发送第二无线信号。
其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
相比现有公开技术，本发明具有如下技术优势：
-.确保了UE应当能在多用户叠加状态和非多用户叠加状态动态切换，支持动态调度的多用户叠加
-.降低了UE执行BD的次数，降低了UE的复杂度，同时避免了过多的BD次数导致的虚警增加。
附图说明
通过阅读参照以下附图所作的对非限制性实施例所作的详细描述，本 发明的其它特征、目的和优点将会变得更加明显：
图1示出了根据本发明的一个实施例的下行多用户叠加的调度流程图；
图2示出了根据本发明的一个实施例的根据第一标志位判断是否接收第二信令的流程图；
图3示出了根据本发明的一个实施例的包括K组调度信息的第二信令的示意图；
图4示出了根据本发明的一个实施例的包括一组调度信息的第二信令的示意图；
图5示出了根据本发明的一个实施例的UE中的处理装置的结构框图；
图6示出了根据本发明的一个实施例的基站中的处理装置的结构框图；
具体实施方式
下文将结合附图对本发明的技术方案作进一步详细说明，需要说明的是，在不冲突的情况下，本申请的实施例和实施例中的特征可以任意相互组合。
实施例1
实施例1示例了下行多用户叠加的调度流程图，如附图1所示。附图1中，基站N1是UE U2和UE U3的服务小区的维持基站，其中方框F1中的步骤是可选步骤。
对于基站N1，在步骤S11中发送第一信令，第一信令中包括第一标志位。在步骤S12中发送第二信令，第二信令指示第二无线信号的调度信息。在步骤S13中发送第一无线信号和第二无线信号。
对于UE U2，在步骤S21中接收第一信令。在步骤S22中接收第二信令。在步骤S23中接收第二无线信号，从第一无线信号所占用的时频资源上消除第二无线信号带来的干扰，然后接收第一无线信号。
对于UE U3，在步骤S31中接收第二无线信号。
实施例1中，第一信令是物理层信令，第一标志位包括1个比特，用于指示UE U2是否检测第二信令，第一无线信号由第一信令所调度。第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是 物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
作为实施例1的子实施例1，第一无线信号和第二无线信号分别在PDSCH上传输。
作为实施例1的子实施例2，第一无线信号和第二无线信号占用相同的频域资源，所述调度信息不包括用于频域资源分配的信息比特(即UE U2根据第一信令中用于频域资源分配的信息比特确定第一无线信号所占用的频域资源)。
作为实施例1的子实施例3，基站N1在步骤S10中发送第一高层信令，UE U2在步骤S20中接收第一高层信令。第一高层信令指示以下至少之一：
-.第二信令的关联标识
-.第二无线信号的调度信息在第二信令中的位置。
第一高层信令是RRC(Radio Resource Control，无线资源控制)信令或者MAC(Medium Access Control，介质接入控制)信令
实施例2
实施例2示例了根据第一标志位判断是否接收第二信令的流程图，如附图2所示。实施例2是UE侧的操作流程。
UE在步骤S111中接收第一信令，第一信令中包括第一标志位。在步骤S112中判断第一标志位是否指示所述UE检测第二信令。如果是，则在步骤S113中接收第二信令，在步骤S114中从接收信号中消除第二无线信号的干扰，然后执行步骤S115。如果否，则在步骤S115中接收第一无线信号。
实施例2中，第一信令是物理层信令，所述，第一无线信号由第一信令所调度。第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。第二信令指示第二无线信号的调度信息。
作为实施例2的子实施例1，如果第一标志位不指示所述UE检测第二信令，所述UE假定第一无线信号所占用的时频资源上不存在叠加的无线信号。
实施例3
实施例3示例了包括K组调度信息的第二信令的示意图，如附图3所示。
实施例3中，本发明中的所述第二信令中包括K组本发明中的所述调度信息，本发明中的所述第二无线信号的调度信息是附图3中的第一～K组调度信息中的一组。本发明中的所述第一高层信令指示第二无线信号的调度信息在第一～K组调度信息中的索引。
作为实施例3的子实施例1，第二信令在CSS中传输。
作为实施例3的子实施例2，所述调度信息包括MCS。
作为实施例3的子实施例3，所述调度信息包括CRS/URS标志位，或者第二无线信号的调度信令的信令格式。
实施例4
实施例4示例了包括一组调度信息的第二信令的示意图，如附图4所示。
实施例4中，本发明中的所述第二信令包括一组本发明中的所述调度信息，以及(可选的)填充比特。如果一组调度信息所占用的信息比特数等于给定DCI的负载尺寸(即不包括CRC的比特数)，第二信令中不包括所述填充比特。如果一组调度信息所占用的信息比特数小于给定DCI的负载尺寸，第二信令中包括所述填充比特。第二信令的负载尺寸等于所述给定DCI的负载尺寸。
作为实施例4的子实施例1，所述给定DCI是本发明中所述第一信令的目标UE所监测的用于调度本发明中的第一无线信号的传输载波的DCI格式1A，或者DCI 1C。
作为实施例4的子实施例2，所述给定DCI是第一信令。
作为实施例4的子实施例3，所述调度信息包括:
-.传输块相关信息
-.CRS/URS标志位。
作为实施例4的子实施例4，第二无线信号由CRS天线端口发送且采用发送分集的发送方式，或者第二无线信号有URS天线端口发送且采用天线端口{7，8}中的一个或者两个。
实施例5
实施例5示例了一个UE中的处理装置的结构框图，如附图5所示。附 图5中，UE处理装置200主要由第一接收模块201和第二接收模块202组成。
第一接收模块201用于接收第一信令，第一信令中包括第一标志位。第二接收模块202用于接收第一无线信号。
实施例5，第一信令是第一无线信号的调度DCI，所述第一标志位指示所述UE是否检测第二信令。第二信令是DCI。
当第一信令中的所述第一标志位指示所述UE检测第二信令时，第一接收模块201还用于接收第二信令，第二信令指示第二无线信号的调度信息。第二接收模块202还用于接收第二无线信号，从第一无线信号所占用的时频资源上消除第二无线信号带来的干扰。其中，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
作为实施例5的子实施例1，所述调度信息包括:
-.传输块相关信息
-.HARQ进程号
-.CRS/URS标志位，或者第二无线信号的调度信令的信令格式
-.功率相关信息。
实施例6
实施例6示例了一个基站中的处理装置的结构框图，如附图6所示。附图6中，基站处理装置300主要由第一发送模块301和第二发送模块302组成。
第一发送模块301用于发送第一信令，第一信令中包括第一标志位。第二发送模块302用于发送第一无线信号。
实施例6中，第一信令是物理层信令，所述第一标志位指示第一信令的目标UE是否检测第二信令，第一无线信号由第一信令所调度。
当第一信令中的所述第一标志位指示所述UE检测第二信令时，第一发送模块301还用于发送第二信令，第二信令指示第二无线信号的调度信息。第二发送模块302还用于发送第二无线信号。其中，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
作为实施例6的子实施例1，第一发送模块301还用于发送MAC信令 指示第二信令的关联RNTI，发送RRC信令指示第二无线信号的调度信息在第二信令中的位置。
作为实施例6的子实施例2，第一信令是(添加了第一标志位的)DCI格式{1，1A，1B，2，2A，2B，2C}中的一种。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可以通过程序来指令相关硬件完成，所述程序可以存储于计算机可读存储介质中，如只读存储器，硬盘或者光盘等。可选的，上述实施例的全部或部分步骤也可以使用一个或者多个集成电路来实现。相应的，上述实施例中的各模块单元，可以采用硬件形式实现，也可以由软件功能模块的形式实现，本申请不限于任何特定形式的软件和硬件的结合。本发明中的UE包括但不限于手机，平板电脑，笔记本，上网卡等无线通信设备。本发明中的基站包括但不限于宏蜂窝基站，微蜂窝基站，家庭基站，中继基站等无线通信设备。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所做的任何修改，等同替换，改进等，均应包含在本发明的保护范围之内。

Claims (14)

  1. 一种支持多用户叠加的UE中的方法，其中，包括如下步骤：
    -步骤A.接收第一信令，第一信令中包括第一标志位；
    -步骤B.接收第一无线信号；
    其中，第一信令是物理层信令，所述第一标志位指示所述UE是否检测第二信令，第一无线信号由第一信令所调度。
  2. 根据权利要求1所述的支持多用户叠加的UE中的方法，其特征在于，所述步骤A还包括如下步骤A1：
    -步骤A1.接收第二信令，第二信令指示第二无线信号的调度信息；
    其中，第一信令中的所述第一标志位指示UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
  3. 根据权利要求1所述的支持多用户叠加的UE中的方法，其特征在于，所述步骤B还包括如下步骤B2：
    -步骤B2.假定第一无线信号所占用的时频资源上不存在叠加的无线信号；
    其中，第一信令中的所述第一标志位指示所述UE不检测第二信令。
  4. 根据权利要求2所述的支持多用户叠加的UE中的方法，其特征在于，所述步骤A还包括如下步骤：
    -步骤A0.接收第一高层信令，第一高层信令指示以下至少之一：
    -.第二信令的关联标识
    -.第二无线信号的调度信息在第二信令中的位置。
  5. 根据权利要求2或4所述的支持多用户叠加的UE中的方法，其特征在于，所述调度信息包括以下至少之一:
    -.传输块相关信息
    -.HARQ进程号
    -.CRS/URS标志位，或者第二无线信号的调度信令的信令格式
    -.URS相关信息，或者TPMI
    -.功率相关信息。
  6. 一种支持多用户叠加的基站中的方法，其中,包括如下步骤：
    -步骤A.发送第一信令，第一信令中包括第一标志位；
    -步骤B.发送第一无线信号；
    其中，第一信令是物理层信令，所述第一标志位指示第一信令的目标UE是否检测第二信令，第一无线信号由第一信令所调度。
  7. 根据权利要求6所述的支持多用户叠加的基站中的方法，其特征在于，所述步骤A还包括如下步骤A1，所述步骤B还包括如下步骤B1；
    -步骤A1.发送第二信令，第二信令指示第二无线信号的调度信息；
    -步骤B1.发送第二无线信号；
    其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
  8. 根据权利要求6所述的支持多用户叠加的基站中的方法，其特征在于，第一信令的发送服务小区在第一无线信号所占用的时频资源上只发送第一无线信号；其中，第一信令的发送服务小区由基站维持；
    其中，第一信令中的所述第一标志位指示第一信令的目标UE不检测第二信令。
  9. 根据权利要求7所述的支持多用户叠加的基站中的方法，其特征在于，所述步骤A还包括如下步骤：
    -步骤A0.发送第一高层信令，第一高层信令指示以下至少之一：
    -.第二信令的关联标识
    -.第二无线信号的调度信息在第二信令中的位置。
  10. 根据权利要求7或9所述的支持多用户叠加的基站中的方法，其特征在于，所述调度信息包括以下至少之一:
    -.传输块相关信息
    -.HARQ进程号
    -.CRS/URS标志位，或者第二无线信号的调度信令的信令格式
    -.URS相关信息，或者TPMI
    -.功率相关信息。
  11. 一种支持多用户叠加的用户设备，其中,包括如下模块：
    第一模块：用于接收第一信令，第一信令中包括第一标志位；
    第二模块：用于接收第一无线信号；
    其中，第一信令是物理层信令，所述第一标志位指示UE是否检测第二信令，第一无线信号由第一信令所调度。
  12. 根据权利要求11所述的支持多用户叠加的用户设备，其特征在于：
    第一模块还用于接收第二信令，第二信令指示第二无线信号的调度信息；
    其中，第一信令中的所述第一标志位指示所述UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
  13. 一种支持多用户叠加的基站设备，其中,包括如下模块：
    第一模块：用于发送第一信令，第一信令中包括第一标志位；
    第二模块：用于发送第一无线信号；
    其中，第一信令是物理层信令，所述第一标志位指示第一信令的目标UE是否检测第二信令，第一无线信号由第一信令所调度。
  14. 根据权利要求13所述的支持多用户叠加的基站设备，其特征在于：
    第一模块还用于发送第二信令，第二信令指示第二无线信号的调度信息；
    第二模块还用于发送第二无线信号；
    其中，第一信令中的所述第一标志位指示UE检测第二信令，第二信令是物理层信令，第一无线信号所占用的时频资源和第二无线信号所占用的时频资源全部或者部分重叠。
PCT/CN2016/076612 2015-04-06 2016-03-17 一种支持多用户叠加的ue、基站中的方法和设备 WO2016161881A1 (zh)

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