WO2016179781A1 - Procédé d'indication d'informations de commande, station de base, dispositif d'utilisateur, et système de communication - Google Patents

Procédé d'indication d'informations de commande, station de base, dispositif d'utilisateur, et système de communication Download PDF

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Publication number
WO2016179781A1
WO2016179781A1 PCT/CN2015/078678 CN2015078678W WO2016179781A1 WO 2016179781 A1 WO2016179781 A1 WO 2016179781A1 CN 2015078678 W CN2015078678 W CN 2015078678W WO 2016179781 A1 WO2016179781 A1 WO 2016179781A1
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Prior art keywords
soma
information
pairing
paired
downlink control
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PCT/CN2015/078678
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English (en)
Chinese (zh)
Inventor
龚政委
程型清
吴强
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华为技术有限公司
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Priority to CN201580079743.5A priority Critical patent/CN107534922A/zh
Priority to PCT/CN2015/078678 priority patent/WO2016179781A1/fr
Publication of WO2016179781A1 publication Critical patent/WO2016179781A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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 embodiments of the present invention relate to communication technologies, and in particular, to a control information indication method, a base station, a user equipment, and a communication system.
  • the downlink multiple access method is usually An orthogonal frequency division multiplexing (OFDM) orthogonal frequency division multiple access method is adopted.
  • OFDM orthogonal frequency division multiplexing
  • the main feature of the orthogonal frequency division multiple access technology is that different users use different time-frequency resources to ensure that the received signals between user equipments are free from interference, thereby achieving simple reception on the user side.
  • NOMA non-orthogonal multiplexing access
  • the transmission signals of multiple users are superimposed in the time-frequency domain, and the different users are allocated different powers to ensure accurate reception on the user side.
  • the transmitting side mixed signal of NOMA is only a linear superposition of signals of multiple user equipments, and the high-order constellation diagram formed is not one of the existing optimal constellation diagrams.
  • the demodulation of the central user at the center of the cell must be eliminated in the cell.
  • the edge of the edge is interfered with by the user based on the signal, and the complexity is higher.
  • the Gray coding characteristic of the existing modulation method is utilized, and the high-order constellation diagram and the low-order constellation diagram are dynamically implemented and used by the user equipment.
  • the channel is matched.
  • the SOMA is based on the Gray constellation design, which makes the multi-user transmission performance on the unit time-frequency resource more robust, and the implementation of the receiver is simpler. It can be eliminated by continuous interference cancellation.
  • SIC implements user information demodulation.
  • a solution for implementing SOMA technology has not been proposed.
  • Embodiments of the present invention provide a control information indication method, a base station, a user equipment, and a communication system, To implement the control information indication of the SOMA.
  • an embodiment of the present invention provides a method for indicating a control information, including:
  • the base station sends the semi-orthogonal multiple access SOMA status indication information to the user equipment UE; the SOMA status indication information is used to indicate the SOMA pairing status of the UE, and the UE in the SOMA pairing status determines the downlink control that the UE needs to receive. information;
  • the base station sends downlink control information to the UE, where the downlink control information includes parameters required for demodulation by the UE in the SOMA pairing state.
  • the parameters required for demodulating a UE in a SOMA pairing state include high-order modulation constellation indication information used by the base station, the high-order modulation
  • the constellation indication information is used to indicate to the UE the high order modulation order that is required for demodulation.
  • the downlink control information further includes at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication Information and resource allocation information for paired UE interference;
  • the SOMA pairing power allocation information is used to indicate a power allocation ratio between the UE and a paired UE of the UE;
  • the paired interference indication information is used to directly indicate whether the UE has paired UE interference
  • the resource allocation information of the paired UE interference is used to indicate a time-frequency resource used by the paired UE of the UE.
  • the parameters required for performing demodulation by the UE in the SOMA pairing state include: SOMA pairing power allocation information, where the SOMA pairing power allocation information is used to indicate A power allocation ratio between the UE and the paired UE of the UE.
  • the SOMA pairing state of the UE includes that the channel condition of the UE is compared with that of the UE. UE is good.
  • the SOMA pairing state of the UE includes a channel condition in which the UE is located is more paired with the UE.
  • the UE is poor.
  • the downlink control information is sent through the physical downlink control channel PDCCH.
  • the SOMA state indication information is used to indicate a SOMA pairing state of the UE, so that the SOMA pairing state is
  • the determining, by the UE, the downlink control information that the UE needs to receive includes at least one or more of the following:
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a format of downlink control information that the UE needs to receive;
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a type of downlink control information that the UE needs to receive;
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a parameter name required by the UE for performing demodulation.
  • the UE in the SOMA pairing state and the paired UE of the UE share a unit time-frequency resource And sharing the downlink transmit power resources on the unit time-frequency resource.
  • the SOMA status indication information is sent by using high layer signaling.
  • an embodiment of the present invention provides a control information indication method, including:
  • the user equipment UE receives the semi-orthogonal multiple access SOMA status indication information sent by the base station; the SOMA status indication information is used to indicate the SOMA pairing status of the UE, and the UE determines the downlink control information that needs to be received;
  • the parameter required for demodulating a UE in a SOMA pairing state includes high-order modulation constellation indication information used by the base station, the high-order modulation
  • the constellation indication information is used to indicate to the UE the high order modulation order that is required for demodulation.
  • the downlink control information further includes at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication Information and resource allocation information for paired UE interference;
  • the SOMA pairing power allocation information is used to indicate power allocation information when the UE is in a UE pairing state
  • the paired interference indication information is used to directly indicate whether the UE has paired UE interference
  • the resource allocation information of the paired UE interference is used to indicate a time-frequency resource used by the paired UE of the UE.
  • the method further includes: determining, by the UE, that the channel condition is located according to the SOMA status indication information The UE paired UE is good, and the UE performs demodulation according to the high-order modulation constellation indication information.
  • the UE before the demodulating, the UE, according to the high-order modulation constellation indication information, further includes:
  • the value of the high-order modulation constellation indication information is greater than the value of the low-order modulation constellation indication information received by the UE, there is paired UE interference.
  • the determining, according to the SOMA pairing power allocation information included in the downlink control information, that the interference of the paired UE is:
  • the UE determines that the power allocation value of the paired UE is not 0 according to the SOMA pairing power allocation information, there is paired UE interference.
  • the parameters required for the UE in the SOMA pairing state to perform demodulation include:
  • the SOMA is paired with power allocation information, where the SOMA pairing power allocation information is used to indicate power allocation information when the UE is in a UE pairing state.
  • the method further includes: determining, by the UE, the channel condition that is located according to the SOMA status indication information The UE paired UE is poor, and the UE performs demodulation according to the SOMA pairing power allocation information.
  • the UE receives the SOMA pairing status of the UE indicated by the SOMA status indication information
  • the downlink control information sent by the base station includes:
  • Determining the downlink control information to be received includes at least one or more of the following: determining a format of downlink control information to be received, determining a type of downlink control information to be received, and determining a required reception The name of the parameter used for demodulation.
  • the downlink control information is sent by using a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the UE in the SOMA pairing state and the paired UE of the UE share a unit time-frequency Resources, and share downlink transmit power resources on the unit time-frequency resources.
  • the SOMA status indication information is sent by using high layer signaling.
  • an embodiment of the present invention provides a base station, including:
  • a sending module configured to send semi-orthogonal multiple access SOMA status indication information to the user equipment UE, where the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines the UE required Receiving downlink control information; transmitting downlink control information to the UE, where the downlink control information includes parameters required for demodulation by a UE in a SOMA pairing state.
  • the parameters required for demodulating the UE in the SOMA pairing state include high-order modulation constellation indication information used by the base station, the high-order modulation
  • the constellation indication information is used to indicate to the UE the high order modulation order that is required for demodulation.
  • the downlink control information further includes at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication Information and resource allocation information for paired UE interference;
  • the SOMA pairing power allocation information is used to indicate that the UE is matched with the UE.
  • the paired interference indication information is used to directly indicate whether the UE has paired UE interference
  • the resource allocation information of the paired UE interference is used to indicate a time-frequency resource used by the paired UE of the UE.
  • the parameters required for performing demodulation by the UE in the SOMA pairing state include: SOMA pairing power allocation information, where the SOMA pairing power allocation information is used to indicate A power allocation ratio between the UE and the paired UE of the UE.
  • the SOMA pairing state of the UE includes that the channel condition of the UE is compared with that of the UE. UE is good.
  • the SOMA pairing state of the UE includes a channel condition in which the UE is located is more paired with the UE.
  • the UE is poor.
  • the downlink control information is sent by using a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the SOMA state indication information is used to indicate a SOMA pairing state of the UE, so that the SOMA pairing state is
  • the determining, by the UE, the downlink control information that the UE needs to receive includes at least one or more of the following:
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a format of downlink control information that the UE needs to receive;
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a type of downlink control information that the UE needs to receive;
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a parameter name required by the UE for performing demodulation.
  • the UE in the SOMA pairing state and the paired UE of the UE share a unit time-frequency resource And sharing the downlink transmit power resources on the unit time-frequency resource.
  • the SOMA status indication information is sent by using high layer signaling.
  • the embodiment of the present invention provides a user equipment UE, including:
  • a receiving module configured to receive semi-orthogonal multiple-address SOMA status indication information sent by the base station, where the SOMA status indication information is used to indicate a SOMA pairing status of the UE, so that the UE determines downlink control information that needs to be received;
  • the parameter required for demodulating a UE in a SOMA pairing state includes high-order modulation constellation indication information used by the base station, the high-order modulation
  • the constellation indication information is used to indicate to the UE the high order modulation order that is required for demodulation.
  • the downlink control information further includes at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication Information and resource allocation information for paired UE interference;
  • the SOMA pairing power allocation information is used to indicate power allocation information when the UE is in a UE pairing state
  • the paired interference indication information is used to directly indicate whether the UE has paired UE interference
  • the resource allocation information of the paired UE interference is used to indicate a time-frequency resource used by the paired UE of the UE.
  • the method further includes: a processing module, configured to determine, according to the SOMA status indication information, that the channel condition is The UE paired UE is good, and demodulation is performed according to the high-order modulation constellation indication information.
  • the processing module is further configured to:
  • the processing module is specifically configured to:
  • the value of the high-order modulation constellation indication information is greater than the value of the low-order modulation constellation indication information received by the UE, there is paired UE interference.
  • the processing module is specifically configured to:
  • the parameters required for the UE in the SOMA pairing state to perform demodulation include:
  • the SOMA is paired with power allocation information, where the SOMA pairing power allocation information is used to indicate power allocation information when the UE is in a UE pairing state.
  • the processing module is further configured to: determine, according to the SOMA state indication information, that a channel condition is located to be paired with the UE The UE difference is demodulated according to the SOMA pairing power allocation information.
  • the receiving module is specifically configured to:
  • Determining the downlink control information to be received includes at least one or more of the following: determining a format of downlink control information to be received, determining a type of downlink control information to be received, and determining a required reception The name of the parameter used for demodulation.
  • the downlink control information is sent by using a physical downlink control channel PDCCH.
  • the UE in the SOMA pairing state and the paired UE of the UE share a unit time-frequency Resources, and share downlink transmit power resources on the unit time-frequency resources.
  • the SOMA status indication information is sent by using high layer signaling.
  • an embodiment of the present invention provides a base station, including: a transceiver, a memory, and a processor.
  • the processor is configured to execute a step in the method in the memory to perform the method in any one of the possible implementation manners of the first aspect, and control the transceiver to transmit and/or receive.
  • an embodiment of the present invention provides a user equipment (UE), including: a transceiver, a memory, and a processor.
  • UE user equipment
  • the processor is configured to execute a step in the method in the memory to perform the method in any one of the possible implementation manners of the second aspect, and control the transceiver to transmit and/or receive.
  • a seventh aspect of the present invention provides a communication system, including:
  • a base station according to the above fifth aspect, and the user equipment UE as described in the sixth aspect above.
  • Embodiments of the present invention provide a control information indication method, a base station, a user equipment, and a communication system.
  • the control information indication method includes: the base station sends the SOMA status indication information to the UE; the SOMA status indication information is used to indicate the SOMA pairing status of the UE, and the UE in the SOMA pairing status determines the downlink control that the UE needs to receive.
  • the base station sends downlink control information to the UE, where the downlink control information includes parameters required for demodulation by the UE in the SOMA pairing state. Therefore, the base station can implement information transmission to at least two UEs by using the same time-frequency resource and power resources on the same unit time-frequency resource.
  • the 3rd generation partnership project (English: 3rd generation partnership project, 3GPP) is a project dedicated to the development of wireless communication networks. Generally, a 3GPP related organization is referred to as a 3GPP organization.
  • a wireless communication network is a network that provides wireless communication functions.
  • the wireless communication network can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (English) :time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier Frequency Division Multiple Access (English: Single Carrier FDMA, SC-FDMA for short), Carrier Sense Multiple Access/Collision Avoidance (English: Carrier Sense Multiple Access with Collision) Avoidance).
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency-division multiple access
  • Single carrier Frequency Division Multiple Access English: Single Carrier FDMA, SC-FDMA for short
  • Carrier Sense Multiple Access/Collision Avoidance English: Carrier Sense Multiple Access with Collision) Avoidance
  • the network can be divided
  • a typical 2G network includes a global system for mobile communications/general packet radio service (GSM) network or a general packet radio service (GPRS) network.
  • GSM global system for mobile communications/general packet radio service
  • GPRS general packet radio service
  • a typical 3G network is used.
  • the network includes a universal mobile telecommunications system (UMTS) network.
  • UMTS universal mobile telecommunications system
  • a typical 4G network includes a long term evolution (LTE) network.
  • LTE network long term evolution
  • the UMTS network may also be referred to as a universal terrestrial radio access network (UTRAN).
  • UTRAN universal terrestrial radio access network
  • the LTE network may also be referred to as an evolved universal terrestrial radio access network (English: evolved universal terrestrial) Radio access network, referred to as E-UTRAN.
  • a cellular communication network can be divided into a cellular communication network and a wireless local area network (English: wireless local area networks, WLAN for short), wherein the cellular communication network is dominated by scheduling, and the WLAN is dominant.
  • the aforementioned 2G, 3G and 4G networks are all cellular communication networks. It should be understood by those skilled in the art that as the technology advances, the technical solutions provided by the embodiments of the present invention are equally applicable to other wireless communication networks, such as 4.5G or 5G networks, or other non-cellular communication networks. For the sake of brevity, embodiments of the present invention sometimes refer to a wireless communication network as a network.
  • the cellular communication network is a type of wireless communication network, which adopts a cellular wireless networking mode, and is connected between the terminal device and the network device through a wireless channel, thereby enabling users to communicate with each other during activities. Its main feature is the mobility of the terminal, and it has the function of handoff and automatic roaming across the local network.
  • User equipment (English: user equipment, abbreviated as UE) is a terminal device, which can be a mobile terminal device or a non-mobile terminal device. The device is mainly used to receive or send business data. User equipment can be distributed in the network. User equipments have different names in different networks, such as: terminals, mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, knees. Upper computer, cordless phone, wireless local loop station, etc. The user equipment can communicate with one or more core networks via a radio access network (RAN) (access portion of the wireless communication network), such as exchanging voice and/or data with the radio access network.
  • RAN radio access network
  • a device that provides a base station function in a 2G network includes a base transceiver station (BTS) and a base station controller (BSC), and a device that provides a base station function in a 3G network.
  • BTS base transceiver station
  • BSC base station controller
  • the device providing the base station function in the 4G network includes the evolved Node B (English: evolved NodeB, eNB for short)
  • the device that provides the function of the base station is an access point (English: Access Point, abbreviated as AP). It can also be a node in a future network such as a 4.5G or 5G network.
  • Cell The area covered by the wireless signal in mobile communication is called a cell, and generally refers to a range that can be covered by the signal of one base station.
  • Cell center In the range covered by the base station signal, the area where the signal strength is greater than a certain threshold is called the cell center.
  • Cell edge In the range covered by the base station signal, the area where the signal strength is less than a certain threshold is called the cell edge.
  • the UE in the center of the cell is the central user.
  • Edge users The UE at the edge of the cell is the edge user.
  • Resource includes at least one or more of a time resource, a frequency resource, a code resource, and a space resource
  • Time resource A resource whose signal is measured by time, for example, the signal occupies 2 OFDM symbols in time, or 1 subframe, or 3 radio frames.
  • the time resource may include an absolute time resource and a relative time resource, such as at least one or more of a radio frame number, a relative position of the subframe in the radio frame, and a relative position of the symbol in the subframe.
  • the time resources are usually described as fixed or variable and are described for relative time resources. Generally, when the time resources are the same, the absolute time resources may be the same, or the relative time resources may be the same.
  • Frequency resource The resource occupied by the signal is measured by frequency. For example, the signal occupies 10 MHz in frequency. In an OFDM system, the number of subcarriers is usually used to describe the occupied frequency resource.
  • Time-frequency resource A resource whose signal is occupied by time and frequency. For example, the signal occupies 2 OFDM symbols in time and occupies 10 MHz on the frequency.
  • Code resource A resource whose signal is occupied by a code, such as spread spectrum in WCDMA.
  • the code, or the sequence resource used by the signal is also called a code resource.
  • the sequence used by the synchronization signal is also called a code resource.
  • Sequence A type of code resource.
  • Unit time-frequency resource The minimum unit time resource and frequency resource, in the OFDM system, refers to a sub-carrier and a resource element composed of one OFDM symbol (English: resource element).
  • FIG. 1 is a schematic diagram of a scenario for transmitting signals using SOMA technology
  • FIG. 2 is a flowchart of a method for indicating control information according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for indicating control information according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a UE according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic structural diagram of a UE according to Embodiment 2 of the present invention.
  • At least two UEs in the SOMA transmission state can implement information transmission using the same time-frequency resource.
  • the network side can implement information transmission to at least two UEs by using the same time-frequency resource.
  • at least two UEs share downlink power resources on a unit time-frequency resource.
  • At least two UEs that perform SOMA pairing may be UEs with different channel conditions.
  • the network side may configure the at least two UEs as the SOMA transmission state.
  • At least two UEs that perform SOMA pairing may also be UEs in other situations, which are not limited herein.
  • at least two UEs that perform SOMA pairing may be described as an example of a UE with a large difference in channel conditions.
  • the implementation scenario can be divided into two scenarios: UE transparent with poor channel conditions and non-transparent UE with poor channel conditions. That is, in the SOMA scenario, whether the SOMA pairing state is explicitly indicated to the UE with poor channel conditions. .
  • FIG. 1 is a schematic diagram of a scenario for transmitting signals using SOMA technology.
  • the embodiment of the present invention uses two UEs as an example for description. It should be noted that two UEs with different channel conditions may be located at the cell center (referred to as the central UE), one at the cell edge (referred to as the edge UE), or both at the cell center, or two. They are all located at the edge of the community.
  • the embodiment of the present invention describes a scheme in which two UEs are respectively a central UE and an edge UE.
  • the embodiment of the present invention is described by taking an evolved base station eNB as an example, but does not exclude the method applied to other network standards or forms, such as in a future network (such as 4.5G or 5G).
  • FIG. 2 is a flowchart of a method for indicating control information according to Embodiment 1 of the present invention.
  • the control information indication method provided in this embodiment may be specifically performed by a wireless network device.
  • an evolved base station evolved Node B, eNB
  • the method can include:
  • the eNB sends the SOMA status indication information to the UE.
  • the SOMA status indication information is used to indicate the SOMA pairing status of the UE, and the UE in the SOMA pairing status determines downlink control information that the UE needs to receive.
  • the eNB may trigger an action of sending the SOMA status indication information to the UE according to an actual requirement.
  • UEs with different channel conditions are paired.
  • the eNB can determine, according to the existing channel measurement algorithm, that the channel conditions of the two UEs are different, the eNB triggers an action of sending the SOMA status indication information to the UE, and the two channel conditions are used.
  • the UEs with different differences are paired, so that the two UEs can use the same time-frequency resources to implement information transmission.
  • the UE in the SOMA pairing state shares a unit time-frequency resource with the paired UE of the UE, and shares the downlink transmit power resource on the unit time-frequency resource.
  • Unit time-frequency resources can It is a subcarrier and an OFDM symbol; the UE in the SOMA pairing state shares the same downlink transmission power resource with the UE's paired UE on the unit time-frequency resource, which means that the two UEs in the SOMA pairing state are on the unit time-frequency resource.
  • the sum of the downlink transmit powers is constant.
  • the SOMA status indication information may be sent by using high layer signaling, such as radio resource control (RRC) signaling, and the sending frequency is low.
  • RRC radio resource control
  • the SOMA status indication information is used to indicate the SOMA pairing status of the UE, and the UE in the SOMA pairing state determines that the downlink control information that the UE needs to receive includes at least one or more of the following: the SOMA status indication The information is used to indicate the SOMA pairing status of the UE, and the UE in the SOMA pairing state determines the format of the downlink control information that the UE needs to receive; the SOMA status indication information is used to indicate the SOMA pairing status of the UE, The UE in the SOMA pairing state determines the type of downlink control information that the UE needs to receive; and the SOMA state indication information is used to indicate the SOMA pairing state of the UE, so that the UE in the SOMA pairing state determines the The parameter name required by the UE for demodulation.
  • the transmission mode configuration information Cofig_TM_UE may be sent to the UE to configure the transmission mode used by the UE.
  • the Cofig_TM_UE configured by different UEs may be different or the same. This example does not limit this.
  • the transmission mode may include at least one or more of hierarchical, open loop multiplexing, closed loop multiplexing, and spatial multiplexing.
  • the downlink control information transmitted in the physical downlink control channel is related to the transmission mode, and thus may be transmitted.
  • the mode configuration information configures a transmission mode used by the UE, so that the UE determines the downlink control information that needs to be received according to the configured transmission mode, for example, determines the format of the downlink control information that needs to be received.
  • the UE may learn the configured transmission mode according to the transmission mode configuration information, and learn to be configured as the SOMA pairing state according to the SOMA state indication information, thereby determining the downlink control information that needs to be received.
  • the eNB sends downlink control information to the UE, where the downlink control information includes parameters required for demodulation by a UE in a SOMA pairing state.
  • the downlink control information includes downlink control information that the UE needs to receive in S101.
  • the downlink control information can be delivered by using a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the eNB transmits the SOMA pairing status indication information only to the central UE.
  • the UE that receives the SOMA pairing status indication information can determine that it is the central UE. That is, the SOMA pairing status of the UE that receives the SOMA pairing status indication information includes that the channel condition of the UE is better than the UE paired with the UE.
  • Parameters required for demodulation by a UE in a SOMA pairing state include higher order modulation constellation indication information used by the eNB, the high order modulation constellation indication information being used to indicate to the UE the required use of demodulation The order of the high order modulation.
  • the high-order modulation constellation diagram is a constellation corresponding to the superimposition and encoding of the plurality of UE information, for example, the demodulation information required by the central UE corresponds to the low-order information of the constellation point, and the demodulation information required by the edge UE corresponds to the constellation point.
  • the demodulation information required by the center UE is obtained in the lower bit information corresponding to the modulation order.
  • the downlink control information may further include at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication information, And, there is resource allocation information for paired UE interference.
  • the SOMA pairing power allocation information is used to indicate power allocation information of the UE and/or the paired UE of the UE, such as: a total transmission power of a resource element (RE), and the UE and the UE a power allocation ratio between the paired UEs, or a total transmit power of the RE and a power of the UE, or a total transmit power of the RE and a power of the paired UE of the UE, or a power of the UE and the The power of the paired UE of the UE.
  • the existing power indication information only indicates the total transmit power of the RE.
  • the UE may be informed of the power allocation information (directly or indirectly).
  • the UE can obtain its own data transmission power. How to enable the UE to obtain its own data transmission power may be one of the foregoing examples, and may be other manners, which is not limited herein.
  • the pairing interference indication information may directly indicate whether the UE has paired UE interference, for example, it may be explicitly indicated by 1 bit whether there is paired UE interference.
  • the resource allocation information is used to indicate time-frequency resources used by the paired UEs of the UE, and the time-frequency resources used by the paired UEs are completely the same as the time-frequency resources used by the central UE, and are not completely the same. If the time-frequency resource used by the paired UE is not exactly the same as the time-frequency resource used by the central UE, the resource allocation information may be used to enable the central UE to know which part of the time-frequency resource is present in the paired UE interference.
  • the downlink control information received by the central UE configured in the SOMA pairing state may also include some necessary control information corresponding to the downlink transmission mode in the prior art, which may be simply referred to as DCI_TM (downlink control inforamtion_transmission mode).
  • DCI_TM downlink control inforamtion_transmission mode
  • the necessary control information may be, for example, information such as a modulation order or a resource allocation, where the resource may include time domain resource allocation information or frequency domain resource allocation information, etc., and the modulation order is performed by the UE after receiving the data.
  • the modulation order can include an existing low order modulation order.
  • the DCI can be received in the existing manner, and the data is demodulated, and details are not described herein.
  • the SOMA pairing status indication information is sent to both the central UE and the edge UE.
  • the SOMA pairing state indication information of the center UE is configured to be 0
  • the SOMA pairing state indication information of the edge UE is configured to be 1.
  • the UE that receives the SOMA pairing status indication information can determine whether it is the central UE or the edge UE through the SOMA pairing status indication information.
  • the SOMA pairing status of the edge UE of the received SOMA pairing status indication information includes that the channel condition of the UE is worse than the UE paired with the UE.
  • the information included in the downlink control information that is configured to be in the SOMA pairing state is the same as that in the scenario in which the SOMA pairing state is not explicitly indicated to the edge UE, and details are not described herein.
  • the downlink control information received by the central UE and the edge UE configured in the SOMA pairing state may also include some necessary DCI_TMs corresponding to the downlink transmission mode in the prior art, and details are not described herein.
  • the parameters required for the edge UE to perform demodulation included in the downlink control information transmitted by the eNB to the edge UE include SOMA pairing power allocation information.
  • the SOMA pairing power allocation information is used to indicate power allocation information of the UE and/or the paired UE of the UE, for example, sending of an RE
  • how to enable the edge UE to obtain the power of the data received by the edge UE may be one of the foregoing examples, or may be other manners, which is not specifically limited in this embodiment.
  • the downlink control information that is sent to the UE configured in the SOMA pairing state is not completely the same as the downlink control information that is sent to the UE that is not configured to be in the SOMA pairing state. Therefore, in this embodiment, the downlink control information is used.
  • the format can be simply differentiated, that is, the downlink control information in the non-SOMA paired state in a certain transmission mode is defined as DCI_TM_UE, that is, the downlink control information format in the prior art, and the SOMA in a certain transmission mode is used.
  • the downlink control information in the paired state is defined as DCI_TM_UE_SOMA; in the actual application process, DCI_TM_UE_SOMA may include all the same information included in the DCI_TM_UE. In this way, the UE can receive the DCI according to the format of the DCI_TM_UE_SOMA according to the received SOMA status indication information.
  • This embodiment provides a scheme in which the network side can send the SOMA status indication information only to the central UE.
  • the scheme in which the network side can send the SOMA status indication information to both the paired UEs is also given.
  • the UE in the SOMA pairing state can implement information transmission by using the same time-frequency resource.
  • the transmission frequency is low, and the downlink control information including the parameters required for demodulation of the UE in the SOMA pairing state may not be sent by each TTI, and therefore The downlink control information is saved by the TTI to save signaling overhead.
  • the power allocation and resource allocation of the UE in the SOMA pairing state are more flexible, so that the base station can utilize the same time-frequency resource and the power resources on the same unit time-frequency resource.
  • FIG. 3 is a flowchart of a method for indicating control information according to Embodiment 2 of the present invention.
  • the control information indication method provided in this embodiment may be specifically performed by a UE configured to be in a SOMA pairing state.
  • the method can include:
  • the UE receives the SOMA status indication information sent by the eNB.
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE determines the downlink control information that needs to be received.
  • the eNB may trigger an action of sending the SOMA status indication information to the UE according to an actual requirement.
  • UEs with different channel conditions are paired.
  • the eNB triggers the action of sending the SOMA status indication information to the UE, where the two The UEs with different channel conditions are paired, so that the two UEs can use the same time-frequency resources to implement information transmission.
  • the UE in the SOMA pairing state shares one unit time-frequency resource on the unit time-frequency resource, and shares the downlink transmission power resource on the unit time-frequency resource.
  • the unit time-frequency resource may be one sub-carrier and OFDM symbol; the UE in the SOMA pairing state shares the same downlink transmission power resource with the paired UE of the UE on the unit time-frequency resource, and refers to two UEs in the SOMA pairing state.
  • the sum of the downlink transmit powers on the time-frequency resources is constant.
  • transmission modes configured for different UEs may be the same or different, which is not limited in this embodiment.
  • the SOMA status indication information received by the UE is sent by the eNB by using high layer signaling, such as RRC signaling, and the sending frequency is low.
  • the UE may be a UE with better channel conditions or a UE with poor channel conditions.
  • the UE receives downlink control information sent by the eNB according to the SOMA pairing status of the UE indicated by the SOMA status indication information, where the downlink control information includes a UE for performing demodulation in a SOMA pairing state.
  • the required parameters include a UE for performing demodulation in a SOMA pairing state.
  • the downlink control information may be sent by using the PDCCH.
  • the UE may determine downlink control information that needs to be received according to the SOMA state indication information, and receive downlink control information sent by the base station according to the downlink control information that is required to be received.
  • the control information includes at least one or more of the following: determining a format of downlink control information to be received, determining a type of downlink control information to be received, and determining a name of a parameter to be received for demodulation. .
  • the transmission mode configuration information Cofig_TM_UE may also be received to configure a transmission mode used by the UE.
  • the Cofig_TM_UE configured by different UEs may be different or the same. This embodiment does not limit this.
  • the transmission mode may include one or more of hierarchical, open-loop multiplexing, closed-loop multiplexing, and spatial multiplexing
  • the downlink control information transmitted in the channel is related to the transmission mode
  • the transmission mode configuration information is used to configure the transmission mode used by the UE, so that the UE determines the downlink control information that needs to be received according to the configured transmission mode, for example, determines the format of the downlink control information that needs to be received. Therefore, the UE searches for the format of the downlink control information that is required to be received in the format of the multiple downlink control information.
  • the UE learns the configured transmission mode according to the transmission mode configuration information, and learns to be configured as the SOMA pairing state according to the received SOMA state indication information, thereby determining the downlink control information that needs to be received, thereby implementing the reception of the required received downlink control information.
  • the foregoing UE may be a central UE or an edge UE.
  • the center UE receives the SOMA status indication information Cofig_SOMA.
  • parameters required for demodulation of a UE in a SOMA pairing state include high-order modulation constellation indication information used by the eNB, the high-order modulation constellation indication information being used to indicate to the UE The high order modulation order required for demodulation.
  • the high-order modulation constellation diagram is a constellation corresponding to the superimposition and encoding of the plurality of UE information, for example, the demodulation information required by the central UE corresponds to the low-order information of the constellation point, and the demodulation information required by the edge UE corresponds to the constellation point.
  • the demodulation information required by the center UE is obtained in the lower bit information corresponding to the modulation order.
  • the downlink control information received by the central UE may further include at least one or more of the following information: SOMA paired power allocation information, paired interference indication information, and resource allocation information in which there is paired UE interference.
  • the SOMA pairing power allocation information is used to indicate power allocation information of the UE and/or the paired UE of the UE, such as: total transmit power of the RE and power allocation between the UE and the paired UE of the UE.
  • the existing power indication information only indicates the total transmit power of the RE.
  • the UE may be informed of the power allocation information (directly or indirectly).
  • the UE can obtain its own data transmission power, and how to enable the UE to obtain its own data transmission power may be one of the foregoing examples. Other methods are also possible, and are not limited herein.
  • the pairing interference indication information may directly indicate whether the UE has paired UE interference, for example, it may be explicitly indicated by 1 bit whether there is paired UE interference.
  • the resource allocation information is used to indicate time-frequency resources used by the paired UEs of the UE, and the time-frequency resources used by the paired UEs are completely the same as the time-frequency resources used by the central UE, and are not completely the same. If the time-frequency resource used by the paired UE is not exactly the same as the time-frequency resource used by the central UE, the resource allocation information may be used to enable the central UE to know which part of the time-frequency resource is present in the paired UE interference.
  • the downlink control information received by the central UE configured as the SOMA pairing state may further include some necessary DCI_TMs corresponding to the downlink transmission mode in the prior art.
  • the necessary control information may be, for example, information such as modulation order or resource allocation, where the resource may include time domain resource allocation information, frequency domain resource allocation information, etc., and the modulation order is that the UE performs the solution after receiving the data.
  • the modulation order is that the UE performs the solution after receiving the data.
  • Required for time modulation wherein the modulation order can include an existing low order modulation order.
  • the DCI can be received in the existing manner, and the data is demodulated.
  • the SOMA status indication information configured by the network side through the high layer signaling changes slowly, and the actual UE pairing status changes rapidly, for example, in practical applications.
  • the eNB sends the SOMA status indication information to the UE to indicate that the central UE is paired with the edge UE, that is, the central UE shares the same transmit power with the edge UE.
  • the central UE may receive the SOMA status.
  • the SOMA pairing status of the central UE is not the same as that when the eNB actually sends the SOMA status indication information.
  • the SOMA pairing power allocation information and the pairing interference indication may also be according to the high-order modulation constellation indication information included in the downlink control information. At least one or more of the information and the resource allocation information in the presence of the paired UE interference determine that there is interference of the paired UE.
  • the determining, according to the high-order modulation constellation indication information included in the downlink control information, that the interference of the paired UE exists includes: if the value of the high-order modulation constellation indication information is greater than the low-order received by the UE If the value of the modulation constellation indicates information, there is paired UE interference; and/or, If the value of the high-order modulation constellation indication information is equal to the value of the low-order modulation constellation indication information received by the UE, there is no paired UE interference.
  • determining, according to the SOMA pairing power allocation information included in the downlink control information, that the interference of the paired UE is included if the UE determines, according to the SOMA pairing power allocation information, that the power allocation value of the paired UE is not 0. , there is paired UE interference.
  • the central UE and the edge UE in the SOMA pairing state will receive the Cofig_SOMA.
  • the UE does not limit this embodiment.
  • the information included in the downlink control information received by the central UE is the same as that in the scenario where the SOMA pairing status is not explicitly indicated to the edge UE, and is configured as the center of the SOMA pairing state.
  • the downlink control information received by the UE and the edge UE may further include some necessary DCI_TMs corresponding to the downlink transmission mode in the prior art, and details are not described herein again.
  • the downlink control information received by the edge UE may include SOMA pairing power allocation information; after receiving the downlink control information sent by the eNB through the PDCCH, the UE may be based on the total transmit power and the SOMA paired power allocation information ( Directly or indirectly) determine the transmit power required to transmit data by itself.
  • the UE determines, according to the SOMA status indication information, that the channel condition is better than that of the UE paired with the UE, and knows that the UE is a central UE, the central UE is configured according to the high-order modulation.
  • the constellation indication information is demodulated; if the UE determines that the channel condition is worse than the UE paired with the UE according to the SOMA status indication information, and knows that the UE is an edge UE, the edge UE may be configured according to the The SOMA pairing power allocation information is demodulated.
  • the downlink control information is different from the downlink control information in the non-SOMA state, and therefore, the UE needs to receive new downlink control information.
  • the actual UE pairing status may be dynamic. For a scenario in which the SOMA state is not explicitly indicated to the edge UE, the center UE needs to determine whether there is paired UE interference according to the downlink control information, if there is no paired UE interference.
  • the UE may directly fall back to the non-SOMA pairing state for demodulation; for the field that the SOMA state explicitly indicates to the edge UE
  • the central UE determines whether there is a paired UE interference according to the downlink control information, so as to determine that there is a downlink transmit power and a demodulation mode corresponding to the central UE on the resource of the paired UE, and the edge UE only needs to determine its own data through the SOMA paired power allocation information.
  • the downlink transmit power is thus demodulated according to the transmit power.
  • the power allocation and resource allocation of the UE in the SOMA pairing state are more flexible, and the control information indication of the SOMA is implemented.
  • the base station includes: a sending module, configured to send SOMA status indication information to the UE; the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a downlink that the UE needs to receive Controlling information; transmitting downlink control information to the UE, where the downlink control information includes parameters required for demodulation by a UE in a SOMA pairing state.
  • the downlink control information that the UE needs to receive may be downlink control information that includes parameters required for the UE to perform demodulation.
  • the downlink control information may be sent by using a PDCCH; the SOMA status indication information is sent by using the high layer signaling; the UE in the SOMA pairing state shares a unit time-frequency resource with the paired UE of the UE, and The downlink transmit power resources on the unit time-frequency resource are shared.
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing state determines that the downlink control information that the UE needs to receive includes at least one or more of the following:
  • the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines a format of downlink control information that the UE needs to receive; the SOMA status indication information is used to indicate the UE.
  • the SOMA pairing state the UE in the SOMA pairing state determines the type of downlink control information that the UE needs to receive; and the SOMA state indication information is used to indicate the SOMA pairing state of the UE, so that the SOMA pairing state is in the SOMA pairing state.
  • the UE determines the parameter name required by the UE for demodulation.
  • the parameters required for demodulation of the UE in the SOMA pairing state include high-order modulation constellation indication information used by the base station, and the high-order modulation constellation diagram The indication information is used to indicate to the UE the high order modulation order that is required for demodulation.
  • the downlink control information may further include at least one or more of the following information: SOMA pairing power allocation information, paired interference indication information, and resource allocation information in which paired UE interference exists;
  • SOMA pairing power allocation information is used to indicate power allocation information of the UE and/or the paired UE of the UE;
  • the pairing interference indication information is used to directly indicate whether the UE has paired UE interference;
  • the resource allocation information with paired UE interference is used to indicate the time-frequency resource used by the paired UE of the UE.
  • the parameters required for demodulation of the UE in the SOMA pairing state may include: SOMA pairing power allocation information, where the SOMA pairing power allocation information is used to indicate the Power allocation information for the UE and/or the paired UE of the UE.
  • the SOMA pairing status of the UE includes that the channel condition of the UE is better than that of the UE paired with the UE; or the channel condition of the UE is worse than that of the UE paired with the UE. .
  • the base station provided in this embodiment may be used to perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar.
  • the method embodiment shown in FIG. 2 or FIG. 3 may be referred to, and details are not described herein again.
  • FIG. 4 is a schematic structural diagram of a UE according to Embodiment 1 of the present invention. As shown in FIG. 4, the UE provided in this embodiment may specifically include:
  • the receiving module 11 is configured to receive SOMA status indication information sent by the base station, where the SOMA status indication information is used to indicate a SOMA pairing status of the UE, to enable the UE to determine downlink control information that needs to be received, and according to the SOMA status.
  • the SOMA pairing status of the UE indicated by the indication information is received by the base station, and the downlink control information includes parameters required for demodulation by the UE in the SOMA pairing state.
  • the receiving module 11 is specifically configured to: determine downlink control information that needs to be received according to the SOMA state indication information, and receive downlink control information that is sent by the base station according to the downlink control information that is required to be received;
  • the downlink control information includes at least one or more of the following: determining a format of downlink control information to be received, determining a type of downlink control information to be received, and determining a parameter to be received for demodulation. name.
  • the downlink control information is sent by using the PDCCH.
  • the UE in the SOMA pairing state shares a unit time-frequency resource with the paired UE of the UE, and shares downlink transmission power resources on the unit time-frequency resource.
  • the SOMA status indication information is sent by higher layer signaling.
  • the parameters required for demodulation of the UE in the SOMA pairing state include high-order modulation constellation indication information used by the base station, where the high-order modulation constellation indication information is used.
  • the high order modulation order required for demodulation is indicated to the UE.
  • the UE may be a UE with better channel conditions.
  • the downlink control information further includes at least one or more of the following information: SOMA pairing power allocation information, pairing interference indication information, and resource allocation information with paired UE interference; wherein the SOMA pairing power allocation information is used to indicate The power allocation information when the UE is in the UE pairing state; the pairing interference indication information is used to directly indicate whether the UE has paired UE interference; and the resource allocation information of the paired UE interference is used to indicate the pairing of the UE Time-frequency resources used by the UE.
  • SOMA pairing power allocation information is used to indicate The power allocation information when the UE is in the UE pairing state
  • the pairing interference indication information is used to directly indicate whether the UE has paired UE interference
  • the resource allocation information of the paired UE interference is used to indicate the pairing of the UE Time-frequency resources used by the UE.
  • the UE may further include: a processing module 12, configured to determine, according to the SOMA state indication information, that a channel condition is better than a UE that is paired with the UE, and perform demodulation according to the high-order modulation constellation indication information.
  • a processing module 12 configured to determine, according to the SOMA state indication information, that a channel condition is better than a UE that is paired with the UE, and perform demodulation according to the high-order modulation constellation indication information.
  • the processing module 12 is further configured to: according to the high-order modulation constellation indication information included in the downlink control information, at least one of SOMA paired power allocation information, paired interference indication information, and resource allocation information with paired UE interference The term or multiple determines that there is interference with the paired UE.
  • the processing module 12 is specifically configured to: if the value of the high-order modulation constellation indication information is greater than a value of the low-order modulation constellation indication information received by the UE, there is a paired UE interference.
  • the processing module 12 is specifically configured to: if the power allocation value of the paired UE is not 0 according to the SOMA pairing power allocation information, there is paired UE interference.
  • the parameters required for the UE in the SOMA pairing state to perform demodulation include: SOMA pairing power allocation information, where the SOMA pairing power allocation information is used to indicate power allocation when the UE is in a UE pairing state. information.
  • the UE may be a UE with poor channel conditions.
  • the processing module 12 is configured to: determine, according to the SOMA state indication information, that a channel condition that is located is worse than a UE paired with the UE, and perform demodulation according to the SOMA pairing power allocation information.
  • the UE of this embodiment may be used to perform the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and the technical effect are similar. For details, refer to the description of the method embodiment shown in FIG. 2 or FIG. 3, and details are not described herein again.
  • FIG. 5 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention.
  • the base station provided in this embodiment may specifically include: a transceiver 21, a memory 22, and a processor 23.
  • the technical solution of the embodiment can be used to perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar.
  • the description of the method embodiment shown in FIG. 2 is omitted, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of a UE according to Embodiment 2 of the present invention.
  • the UE provided in this embodiment may include: a transceiver 31, a memory 32, and a processor 33.
  • the processor 33 when executing the program in the memory 32, performs the steps in the method described in the foregoing embodiment shown in FIG. 3, and controls the transceiver 31 to transmit and/or receive.
  • the UE in this embodiment may be used to perform the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and the technical effect are similar. For details, refer to the description of the method embodiment shown in FIG.
  • the present embodiment provides a communication system, including: the base station according to any one of the foregoing embodiments, and the UE according to any of the foregoing embodiments.
  • the base station is configured to send SOMA status indication information to the UE, where the SOMA status indication information is used to indicate a SOMA pairing status of the UE, and the UE in the SOMA pairing status determines downlink control information that the UE needs to receive; And transmitting, to the UE, downlink control information, where the downlink control information includes parameters required for demodulation by a UE in a SOMA pairing state.
  • the UE is configured to receive the SOMA status indication information sent by the base station, and receive the downlink control information sent by the base station according to the SOMA pairing status of the UE indicated by the SOMA status indication information.
  • the communication system of the present embodiment can be used to perform the technical solution of the foregoing method embodiments.
  • the implementation principle and the technical effects are similar.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be indirect through some interface, device or unit.
  • the coupling or communication connection can be in electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

Dans ses modes de réalisation, la présente invention concerne un procédé d'indication d'informations de commande, une station de base, un dispositif d'utilisateur, et un système de communication. Dans le procédé de la présente invention, des informations d'indication d'état SOMA peuvent être envoyées uniquement à un UE ayant de bonnes conditions de canal, et à au moins deux UE configurés dans un état de transmission SOMA. De cette manière, une station de base peut utiliser les mêmes ressources temps-fréquence et des ressources de puissance sur la même unité de ressources temps-fréquence pour implémenter une transmission d'informations aux deux UE ou plus.
PCT/CN2015/078678 2015-05-11 2015-05-11 Procédé d'indication d'informations de commande, station de base, dispositif d'utilisateur, et système de communication WO2016179781A1 (fr)

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PCT/CN2015/078678 WO2016179781A1 (fr) 2015-05-11 2015-05-11 Procédé d'indication d'informations de commande, station de base, dispositif d'utilisateur, et système de communication

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