WO2018028271A1 - Procédé de transmission d'informations de commande, équipement, et système de communication - Google Patents

Procédé de transmission d'informations de commande, équipement, et système de communication Download PDF

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Publication number
WO2018028271A1
WO2018028271A1 PCT/CN2017/085928 CN2017085928W WO2018028271A1 WO 2018028271 A1 WO2018028271 A1 WO 2018028271A1 CN 2017085928 W CN2017085928 W CN 2017085928W WO 2018028271 A1 WO2018028271 A1 WO 2018028271A1
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Prior art keywords
scheduling
terminal
base station
uplink data
mode
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PCT/CN2017/085928
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English (en)
Chinese (zh)
Inventor
朱广勇
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深圳市金立通信设备有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a control information transmission method, device, and communication system.
  • the Licensed Assisted Access (LAA) system can use unlicensed spectrum (such as 5 GHz spectrum) with the help of licensed spectrum in Long Term Evolution (LTE) systems.
  • LTE Long Term Evolution
  • the Listening Before Talk (LBT) mechanism is required on the unlicensed frequency band in the LAA system. That is, before the data is sent, it is necessary to monitor whether the state of the channel is idle. If the channel is idle, the data information and control information are performed. Send, otherwise no transmission.
  • LBT Listening Before Talk
  • the scheduling modes supported by the LAA system are classified into self-scheduling and cross-carrier scheduling.
  • cross-carrier scheduling should be used as much as possible to improve the scheduling success rate when the LBT fails.
  • self-scheduling needs to be adopted as much as possible to avoid excessive signaling overhead.
  • RRC Radio Resource Control
  • Embodiments of the present invention provide a control information transmission method, device, and communication system, which can improve system performance.
  • a first aspect of the embodiments of the present invention discloses a control information transmission method, including:
  • Determining a first scheduling mode for the terminal to perform uplink data scheduling where the first scheduling mode includes self-scheduling or cross-carrier scheduling;
  • the uplink scheduling is performed for the terminal by using the adjusted scheduling mode.
  • a second aspect of the embodiments of the present invention discloses a control information transmission method, including:
  • control information that carries the adjusted scheduling mode, where the control information is used to instruct the terminal to switch the first scheduling mode to the adjusted scheduling mode
  • the uplink data is sent to the base station according to the adjusted scheduling manner.
  • a third aspect of the embodiment of the present invention discloses a base station, including:
  • a determining unit configured to determine a first scheduling mode for performing uplink data scheduling for the terminal, where the first scheduling mode includes self-scheduling or cross-carrier scheduling;
  • a monitoring unit configured to monitor several parameters in the wireless communication network
  • An adjusting unit configured to dynamically adjust the first scheduling mode according to the result of monitoring the parameters in the wireless communication network
  • a sending unit configured to send, to the terminal, control information that is used to indicate the adjusted scheduling manner
  • An execution unit is configured to perform uplink data scheduling for the terminal by using the adjusted scheduling manner.
  • a fourth aspect of the embodiment of the present invention discloses a terminal, including:
  • the first sending unit is configured to send uplink data to the base station according to the first scheduling manner in which the terminal currently performs uplink scheduling, where the first scheduling manner includes self-scheduling or cross-carrier scheduling;
  • a receiving unit configured to receive, by the base station, control information that carries the adjusted scheduling mode, where the control information is used to instruct the terminal to switch the first scheduling mode to the adjusted scheduling mode;
  • the second sending unit is configured to send uplink data to the base station according to the adjusted scheduling manner.
  • the base station may determine that the terminal is currently performing the first adjustment of uplink data scheduling.
  • the base station may send the terminal with the indication for adjustment.
  • the base station can use the adjusted scheduling mode to perform uplink data scheduling for the terminal.
  • the base station in the LAA system, can flexibly adjust the first scheduling mode of the uplink data scheduling of the terminal according to the result of monitoring the parameters in the wireless communication network, that is, according to different scenario dynamics. The two different scheduling modes are switched. Whether the LBT fails or succeeds, the base station reasonably selects the scheduling mode, improves the scheduling success rate, avoids excessive signaling overhead, and reduces the data transmission error rate, thereby improving system performance.
  • FIG. 1 is a schematic diagram of a network architecture of a communication system according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a control information transmission method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • Frequency Division Multiple Access Frequency Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Division Multiple Access
  • SC-FDMA Single-Carrier Frequency-Division Multiple Access
  • CDMA networks can be implemented such as universal land Wireless technology such as Universal Telecommunication Radio Access (UTRA) and the Telecommunications Industry Association (TIA).
  • UTRA technology includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA network can implement a wireless technology such as Global System for Mobile Communication (GSM).
  • GSM Global System for Mobile Communication
  • OFDMA systems can be implemented such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wireless Fidelity, Wi-Fi), IEEE 802.16 (Worldwide Interoperability for Worldwide Interoperability) Wireless technology such as Microwave Access, WiMAX), IEEE 802.20, Flash-OFDMA.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wireless Fidelity, Wi-Fi
  • IEEE 802.16 Worldwide Interoperability for Worldwide Interoperability
  • Wireless technology such as Microwave Access, WiMAX
  • WiMAX Worldwide Interoperability
  • IEEE 802.20 Flash-OFDMA.
  • UTRA and E-UTRA technologies are part of the Universal Mobile Telecommunications System (UMTS).
  • LTE and LTE-Advanced are newer versions of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project” (3GPP).
  • 3GPP 3rd Generation Partnership Project 2
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the wireless networks and wireless access technologies mentioned above, as well as other wireless networks and wireless access technologies. For clarity, certain aspects of the technology are described below for LTE or LTE-A (or collectively referred to as "LTE/-A”), and such LTE/-A terminology is used in many of the descriptions below.
  • the wireless communication network may include multiple base stations capable of supporting communication of multiple user equipments.
  • the user equipment can communicate with the base station over the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the user equipment
  • the uplink (or reverse link) refers to the communication link from the user equipment to the base station.
  • a user device can utilize a wireless communication system to transmit and receive data for two-way communication.
  • the user equipment may include a transmitter for data transmission and a receiver for data reception.
  • the transmitter can modulate the transmit Local Oscillator (LO) signal with data to obtain a modulated Radio Frequency (RF) signal, and amplify the modulated RF signal to obtain proper transmission.
  • the RF signal is output at the power level and the output RF signal is transmitted to the base station via the antenna.
  • the receiver can obtain the received RF signal via an antenna, amplify and downconvert the received RF signal with the received LO signal, and process the downconverted signal to recover the data transmitted by the base station.
  • the user equipment can support communication with multiple wireless systems of different Radio Access Technology (RAT) (eg, LTE/TE-A and NR). Each wireless system may have certain characteristics and requirements to efficiently support simultaneous communication of wireless systems utilizing different RATs.
  • RAT Radio Access Technology
  • User equipment may include mobile stations, terminals, access terminals, subscriber units, stations, and the like.
  • the user equipment can also be a cellular phone, a smart phone, a tablet computer, a wireless modem, a personal digital assistant (PDA), a handheld device, a laptop computer, a smartbook, a netbook, a cordless phone, a wireless local loop (wireless Local loop, WLL) site, Bluetooth device, and more.
  • PDA personal digital assistant
  • the user equipment may be capable of communicating with the wireless system, and may also be capable of receiving signals from a broadcast station, one or more satellites in a Global Navigation Satellite System (GNSS), or the like.
  • the user equipment may support one or more RATs for wireless communication, such as GSM, WCDMA, cdma2000, LTE/LTE-A, 802.11, and the like.
  • RAT radio access technology
  • RAT radio technology
  • air interface and “standard” are often used interchangeably.
  • User equipment can support carrier aggregation, and carrier aggregation is operation on multiple carriers.
  • Carrier aggregation can also be referred to as multi-carrier operation.
  • a carrier can refer to a range of frequencies that are used for communication and can be associated with certain characteristics. For example, a carrier may be associated with system information and/or control information describing operations on the carrier.
  • a carrier may also be referred to as a component carrier (CC), a frequency channel, a cell, and the like.
  • CC component carrier
  • a frequency band can include one or more carriers. Illustratively, each carrier can cover up to 20 MHz.
  • the user equipment can be configured with up to 5 carriers in one or two frequency bands.
  • the user equipment may include multiple receivers to simultaneously receive multiple downlink signals at different frequencies.
  • These multiple downlink signals may be transmitted by one or more base stations on multiple carriers at different frequencies for carrier aggregation.
  • Each receiver may receive one or more downlink signals transmitted to the user equipment on one or more carriers.
  • a UE operating in a carrier aggregation scenario is configured to aggregate certain functions of multiple carriers, such as control and feedback functions, on the same carrier, which may be referred to as a primary carrier or a primary component carrier (PCC). ). Rely on the Lord The remaining carriers supported by the carrier are referred to as associated secondary carriers or secondary component carriers (SCCs).
  • the primary carrier is sent by the primary cell.
  • the secondary carrier is sent by the secondary cell. In some embodiments, there may be multiple primary carriers.
  • the secondary carrier can be added or removed without affecting the basic operation of the UE.
  • control functions may be aggregated from at least two carriers onto one carrier to form a primary carrier and one or more associated secondary carriers.
  • a communication link can be established for the primary carrier and each secondary carrier. The communication can then be controlled based on the primary carrier.
  • the user equipment may also send a UE capability information message indicating the supported frequency band and carrier aggregation bandwidth class to the serving base station.
  • the serving base station can configure the UE using an RRC connection reconfiguration procedure.
  • the RRC connection reconfiguration procedure allows the serving base station to add and remove secondary cells (currently up to four secondary cells) of the serving base station transmitting on the secondary carrier, and to modify the primary cell of the serving base station transmitting on the primary carrier.
  • the serving base station may use the RRC Connection Reconfiguration procedure to add and remove secondary cells at the target primary cell.
  • the serving base station can activate or deactivate the data transmission of the secondary cell using the Activate/Deactivate MAC Control element.
  • the UE monitors the Master Information Block (MIB) and the System Information Block SIB from the primary cell.
  • the primary cell is responsible for transmitting the MIB of the secondary cell and some SIBs to the UE.
  • the primary cell sends a secondary cell MIB and some SIBs by using a radio resource configuration common secondary cell (RadioResourceConfigCommonSCell) information element and a radio resource dedicated secondary cell (RadioResourceDedicatedSCell) information element.
  • RadioResourceConfigCommonSCell radio resource configuration common secondary cell
  • RadioResourceDedicatedSCell radio resource dedicated secondary cell
  • the primary carrier or the primary component carrier may be configured as a first spectrum, and the first spectrum may be a licensed spectrum; the associated secondary carrier or secondary component carrier may be configured as a second spectrum, The second spectrum is an unlicensed spectrum.
  • the uplink/downlink carriers adopt Single-Carrier Frequency-Division Multiple Access (SC-FDMA)/OFDM and Cyclic Prefix (CP) respectively. ).
  • SC-FDMA Single-Carrier Frequency-Division Multiple Access
  • CP Cyclic Prefix
  • the uplink and downlink carriers can be unified, that is, both uplink and downlink adopt OFDM and CP.
  • the bandwidth of the traditional LTE cell working in the frequency band is composed of RBs, and the RBs have fixed subcarrier spacing and symbol length, for example, under normal CP.
  • the size in the frequency domain is 180KHz (ie, 12 15KHz subcarrier spacings), and in the time domain, including 7 symbols, the length of one symbol is approximately equal to 71.5us.
  • different subcarriers may no longer have a fixed subcarrier spacing and a fixed symbol length (which may be dynamically changed) based on the traffic type.
  • the NR system newly defines the concept of "numerology" (reference value), which mainly includes subcarrier spacing, CP length and TTI length.
  • number of service types mainly includes subcarrier spacing, CP length and TTI length.
  • the "numerology" types of different service types may also be different, meaning that different types of subcarrier spacing, CP length, or TTI length may be different.
  • next generation mobile communications will support a single carrier bandwidth of up to 100 MHz.
  • the size of one resource block RB in the frequency domain becomes 900 KHz (ie, 12 75 KHz subcarrier intervals), and 0.1 ms is supported in the time domain.
  • the length of one radio frame is 10 ms, but consists of 50 subframes, each of which has a length of 0.2 ms.
  • the signal type applicable to the NR service described in this document may refer to a configuration including at least one of related parameters such as a carrier interval, a CP length, and a TTI length.
  • the embodiments of the present invention can be applied to an LAA system that uses unlicensed spectrum resources (such as a spectrum of 5 GHz) with the aid of the spectrum of a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • LTE/LTE-A Long Term Evolution/LTE-A
  • the method and apparatus disclosed by the present invention are equally applicable to a network architecture of a subsequent evolution (e.g., next generation 5G).
  • the embodiment of the invention discloses a control information transmission method, device and communication system, which can improve system performance. The details are described below separately.
  • FIG. 1 is a schematic diagram of a network architecture of a communication system according to an embodiment of the present invention.
  • the communication system includes a base station and a terminal.
  • the base station that is, the public mobile communication base station, is a form of a radio station, and refers to a radio transceiver station that performs information transmission between the terminal and the terminal through a mobile communication switching center in a certain radio coverage area.
  • the base station may have different functions and corresponding network configurations in different network scenarios, which is not limited by the present invention.
  • the base station may mainly include a base transceiver station BTS and a base station controller BSC, and in other network scenarios, the base station may also be referred to as NODE B or Evolved Node B.
  • the base station referred to throughout this document may also be The distributed base station BBU or the macro base station RRU is not limited by the present invention.
  • Terminals may include, but are not limited to, smart phones, notebook computers, personal computers (PCs), personal digital assistants (PDAs), mobile Internet devices (MIDs), smart wearable devices (such as smart watches). , smart bracelets and other types of terminals.
  • PCs personal computers
  • PDAs personal digital assistants
  • MIDs mobile Internet devices
  • smart wearable devices such as smart watches
  • smart bracelets and other types of terminals.
  • FIG. 1 it will be understood by those skilled in the art that although only one terminal is shown in FIG. 1, it does not constitute a limitation of the embodiment of the present invention, and may include more terminals than illustrated.
  • the LAA Licensed-Assisted Access to Unlicensed Spectrum
  • the LAA system is introduced to assist in the licensed spectrum (for example, the spectrum of the LTE system).
  • Use unlicensed spectrum resources such as 5 GHz spectrum.
  • the LAA system due to the introduction of unlicensed spectrum resources, the LAA system needs to follow the existing mechanisms of the unlicensed spectrum on the basis of the LTE system.
  • countries have separately stipulated the use of unlicensed spectrum.
  • LBT listen before talk
  • CCA Clear Channel Assessment
  • the UE detects whether other devices are transmitting data on the target channel. If the target channel is occupied by other devices, the device may continue to listen when the next listening period comes, or may not listen according to the indication; if the channel resource is idle, the UE may immediately occupy the target channel.
  • the channel occupation time is a fixed value, which is the time length of the last symbol of the uplink subframe configured by the SRS configuration information. Considering that the UE reports the channel detection conversion process on the SRS, it can be detected in the next channel. Set a quiet time before the position.
  • a random number L may be generated as the backoff time, and the target channel is continuously monitored during the backoff time. If the target channel is detected to be in the idle state, the backoff time ends and the UE is at the same time. The target channel can be occupied for SRS reporting. If the UE detects that the channel state is non-idle (e.g., has been occupied by other UEs), then the device cannot occupy the channel during this period, then the UE can wait until the fixed position of the next cycle to continue detecting.
  • the initial detection is triggered. If the UE initially detects that the target channel is in an idle state, the target channel can be occupied, and the channel occupancy time T is pre-configured by the base station; if the UE initially detects that the target channel state is not idle, a delay period can be generated (defer period) Time, if a target channel is detected to be busy during the deferred cycle time, then a deferred cycle time continues to be generated. The UE may occupy the target channel after detecting that the channel state is idle after the L times detection time, and occupy the target channel time as T.
  • the scheduling modes supported by the LAA system are classified into self-scheduling and cross-carrier scheduling.
  • cross-carrier scheduling should be used as much as possible to improve the scheduling success rate when the LBT fails.
  • self-scheduling needs to be adopted as much as possible to avoid excessive signaling overhead.
  • RRC Radio Resource Control
  • the communication system shown in FIG. 1 supports dynamic conversion of the scheduling mode, and the communication system shown in FIG. 1 is an LAA system.
  • the base station may determine, according to a preset rule, a scheduling manner for performing uplink data scheduling for the terminal, where the scheduling manner includes self-scheduling or cross-carrier scheduling. Further, the base station may send, to the terminal, control information that is used to indicate the scheduling mode, and further, the base station The scheduling mode is used to perform uplink data scheduling for the terminal on the licensed frequency band.
  • the base station in the LAA system, can flexibly determine the scheduling mode for the terminal to perform uplink data scheduling according to the preset rule, that is, dynamically convert two different scheduling modes according to different scenarios, regardless of the LBT failure. If it is successful, the base station reasonably selects the scheduling mode, improves the scheduling success rate, avoids excessive signaling overhead, and at the same time reduces the data transmission error rate, thereby improving system performance.
  • the two scheduling modes of self-scheduling and cross-carrier scheduling may be converted by using a combination of semi-static configuration and dynamic configuration. For example, when the amount of system data is small, the system does not need to perform frequent scheduling of self-scheduling and cross-carrier scheduling. It can be configured in a static scheduling mode. Conversely, when the system data volume is large, the system needs to perform frequent operations. Scheduling and cross-carrier scheduling switching between two scheduling modes can be configured using dynamic scheduling.
  • FIG. 2 is a schematic flowchart of a control information transmission method according to an embodiment of the present invention. The method is described on both sides of the base station and the terminal, and the method is applied to the LAA system. As shown in FIG. 2, the method can include the following steps.
  • the terminal sends uplink data to the base station according to the first scheduling manner in which the terminal performs uplink scheduling.
  • the first scheduling mode includes self-scheduling or cross-carrier scheduling.
  • the scheduling modes supported by the LAA system include self-scheduling and cross-scheduling.
  • the self-scheduling means that the information carried in the downlink control channel (PDCCH) of the downlink carrier unit (CC) corresponds to the downlink resource allocation or the uplink resource allocation of the same CC.
  • the self-scheduling is to control the uplink data transmission on the carrier in the subframe of the carrier, and the self-scheduling is controlled by sending the control information of the uplink data scheduling to the terminal in the PDCCH of the local cell of the terminal, and the control information may include but not It is limited to resource allocation information, frequency hopping information, modulation and coding mode information, and the like.
  • Cross-carrier scheduling refers to a resource that allows a PDCCH on one CC to be scheduled to be transmitted on another CC. That is, the PDCCH is transmitted on one CC, and the corresponding PDSCH or Physical Uplink Shared Channel (PUSCH) is transmitted on another CC.
  • Cross-carrier scheduling is the scheduling of multiple frequency band carriers on a carrier of one frequency band.
  • the cross-carrier scheduling is performed by transmitting control information of the uplink data scheduling to the terminal on the PDCCH channel of the scheduling cell of the terminal, where the control information includes resource allocation information, frequency hopping information, modulation and coding mode information, and the like.
  • the identifier of the scheduling cell may be carried in the control information, and is used to identify which scheduling cell the control information is sent.
  • the present cell can be understood that the base station and the terminal are in the same cell, and the scheduling cell can be understood as the base station and the terminal are in different cells.
  • the manner in which the terminal sends the uplink data to the base station according to the first scheduling mode in which the terminal performs the uplink scheduling is specifically:
  • the first scheduling mode is the self-scheduling, sending uplink data to the base station on a physical uplink shared channel PUSCH of the local cell of the terminal;
  • the uplink data is sent to the base station on the physical uplink shared channel PUSCH of the local cell of the terminal.
  • the terminal may send uplink data to the base station on the physical uplink shared channel (PUSCH) of the local cell of the terminal, whether the first scheduling mode is self-scheduling or cross-carrier scheduling.
  • PUSCH physical uplink shared channel
  • the base station determines, as a first scheduling manner, that the terminal currently performs uplink data scheduling.
  • step 202 and before step 203 the method further includes:
  • the system needs to frequently switch between two scheduling modes, that is, self-scheduling and cross-carrier scheduling, and can be configured by using a dynamic scheduling mode.
  • the system does not need to frequently switch between two scheduling modes: self-scheduling and cross-carrier scheduling. It can be configured in a static scheduling mode.
  • the base station monitors several parameters in the wireless communication network.
  • the base station can monitor the number of failures of the LBT mechanism after the downlink listening first in the unlicensed frequency band;
  • the base station can monitor the received number of uplink data transmission errors.
  • the base station may monitor the status of the LBT mechanism after the downlink listening in the unlicensed frequency band, and whether the uplink data scheduling request sent by the terminal is received.
  • the base station dynamically adjusts according to a result of monitoring a plurality of parameters in the wireless communication network.
  • a scheduling method A scheduling method.
  • cross-carrier scheduling should be used as much as possible to improve the scheduling success rate when the LBT fails.
  • self-scheduling should be adopted as much as possible to avoid Excessive signaling overhead, so dynamic conversion between cross-carrier scheduling and self-scheduling needs to be considered.
  • the manner in which the base station dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network may be specifically:
  • the self is Scheduling switching to the cross-carrier scheduling
  • the cross-carrier scheduling switch is the self-scheduling.
  • a preset number of thresholds such as 3, may be preset.
  • the base station can count the number of failures of the LBT mechanism after the downlink listening first in the unlicensed frequency band. If the number of failures of the LBT mechanism exceeds the preset number of times, the number of times the base station cannot perform downlink data transmission in the expected subframe is compared.
  • the success rate of the uplink scheduling of the terminal is low. In this case, in order to improve the success rate of the uplink scheduling of the terminal, the base station can determine that the scheduling mode for the uplink data scheduling of the terminal is cross-carrier scheduling.
  • the base station can determine that the scheduling mode for the uplink data scheduling of the terminal is self-scheduling. To avoid excessive signaling overhead.
  • the manner in which the base station dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network may be specifically:
  • the cross-carrier scheduling is switched to the self-scheduling.
  • a preset number such as 5, may be preset.
  • the base station can count the number of received uplink data transmission errors. If the number of received uplink data transmission errors exceeds a preset number, the current uplink channel quality is poor. To reduce the error rate of the uplink data transmission, the base station can determine The scheduling mode for uplink data scheduling for the terminal is cross-carrier scheduling. If the number of received uplink data transmission errors does not exceed the preset number, the current uplink channel quality is good, and the base station may determine that the terminal performs uplink data scheduling. The scheduling mode is self-scheduling.
  • the manner in which the base station dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network may be specifically:
  • the base station needs to receive the uplink data scheduling request sent by the terminal, as long as the base station receives the uplink data scheduling request sent by the terminal.
  • the scheduling mode for determining the uplink data scheduling for the terminal is the cross-carrier scheduling, so that it is convenient to respond to the uplink data scheduling request sent by the terminal in time, and at the same time, improve the success rate of the scheduling.
  • the base station sends, to the terminal, control information that carries the scheduling mode for indicating the adjustment.
  • the control information further includes at least one of resource allocation information, frequency modulation information, and modulation and coding mode information.
  • the base station may send, by using a preset bit (such as 1 bit), control information carrying the indication scheduling mode to the terminal.
  • a preset bit such as 1 bit
  • the method for the base station to send, to the terminal, the control information that is used to indicate the adjusted scheduling mode is specifically:
  • the downlink control channel PDCCH of the local cell of the terminal is sent to the terminal to carry the adjusted scheduling party. Control information; or,
  • the control information that is used to indicate the adjusted scheduling mode is sent to the terminal on a downlink control channel PDCCH of the scheduling cell of the terminal.
  • the base station may send, on the downlink control channel PDCCH of the local cell or the scheduling cell of the terminal, the control carried by the base station to indicate the scheduling mode according to different scheduling modes (self-scheduling or cross-carrier scheduling). information.
  • the base station subsequently adopts an adjusted scheduling manner to perform uplink data scheduling for the terminal.
  • the base station may use self-scheduling to allocate uplink transmission resources to the terminal in the licensed frequency band or the unlicensed frequency band to perform uplink data scheduling of the current cell;
  • the scheduling mode is cross-carrier scheduling
  • the base station may use cross-carrier scheduling to allocate uplink transmission resources to the terminal in the licensed frequency band to perform uplink data scheduling of the scheduling cell.
  • the terminal subsequently sends uplink data to the base station according to the adjusted scheduling manner.
  • the control information is used to instruct the terminal to switch the first scheduling mode to the adjusted scheduling mode, and the subsequent terminal may adjust according to the adjustment.
  • the subsequent scheduling mode sends uplink data to the base station.
  • the control information further includes at least one of resource allocation information, frequency modulation information, and modulation and coding mode information.
  • the manner in which the terminal subsequently sends the uplink data to the base station according to the adjusted scheduling manner is specifically:
  • the uplink data is sent to the base station on the physical uplink shared channel PUSCH of the local cell of the terminal.
  • the method further includes:
  • the terminal When the first scheduling mode is the self-scheduling, the terminal performs monitoring of the physical downlink control channel PDCCH in the local cell of the terminal; or
  • the terminal When the first scheduling mode is the cross-carrier scheduling, the terminal performs monitoring of the physical downlink control channel PDCCH in the scheduling cell of the terminal.
  • the terminal may determine, according to the first scheduling mode (self-scheduling or cross-carrier scheduling), the location where the physical downlink control channel PDCCH is located (the current cell or the scheduling cell), and further, the local cell or the scheduling of the terminal.
  • the cell performs monitoring of the physical downlink control channel PDCCH.
  • the method further includes:
  • the terminal When the adjusted scheduling mode is the self-scheduling, the terminal performs monitoring of the physical downlink control channel PDCCH in the local cell of the terminal; or
  • the terminal When the adjusted scheduling mode is the cross-carrier scheduling, the terminal performs monitoring of the physical downlink control channel PDCCH in the scheduling cell of the terminal.
  • this method can reduce the range of the terminal monitoring PDCCH, reduce the complexity of the terminal busy monitoring, and reduce the power consumption of the terminal.
  • the method further includes:
  • the terminal sends an uplink data scheduling request to the base station, to trigger the base station to determine the adjusted according to the received uplink data scheduling request and the state of the LBT mechanism that is monitored by the base station in the downlink of the unlicensed frequency band. Scheduling method.
  • the base station can flexibly adjust the first scheduling mode of the uplink data scheduling currently performed by the terminal according to the result of monitoring the parameters in the wireless communication network, that is, according to different methods.
  • the scenario dynamically converts two different scheduling modes. Regardless of whether the LBT fails or succeeds, the base station reasonably selects the scheduling mode, improves the scheduling success rate, avoids excessive signaling overhead, and reduces the data transmission error rate, thereby improving system performance.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station may be used to perform some or all of the steps in the method shown in FIG. 2. For details, refer to the description in FIG. I will not repeat them here.
  • the base station 300 can include:
  • the determining unit 301 is configured to determine a first scheduling manner for the terminal to perform uplink data scheduling, where the first scheduling manner includes self-scheduling or cross-carrier scheduling.
  • the monitoring unit 302 is configured to monitor several parameters in the wireless communication network
  • the adjusting unit 303 is configured to dynamically adjust the first scheduling mode according to the result of monitoring the parameters in the wireless communication network;
  • the sending unit 304 is configured to send, to the terminal, control information that is used to indicate the adjusted scheduling mode.
  • the executing unit 305 is configured to perform uplink data scheduling for the terminal by using the adjusted scheduling mode.
  • the manner in which the adjusting unit 303 dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network is specifically:
  • the self is Scheduling switching to the cross-carrier scheduling
  • the cross-carrier scheduling switch is the self-scheduling.
  • the manner in which the adjusting unit 303 dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network is specifically:
  • the manner in which the adjusting unit 303 dynamically adjusts the first scheduling mode according to the result of monitoring the parameters in the wireless communication network is specifically:
  • the sending unit 304 sends, to the terminal, a control information that is used to indicate the adjusted scheduling mode, specifically:
  • the control information that is used to indicate the adjusted scheduling mode is sent to the terminal on the downlink control channel PDCCH of the local cell of the terminal; or ,
  • the control information that is used to indicate the adjusted scheduling mode is sent to the terminal on a downlink control channel PDCCH of the scheduling cell of the terminal.
  • the control information further includes at least one of resource allocation information, frequency modulation information, and modulation and coding mode information.
  • the base station 300 shown in FIG. 3 may further include:
  • the determining unit 306 is configured to determine, after the determining unit 301 determines that the terminal currently performs uplink data scheduling, whether the amount of data in the system is greater than a preset value;
  • the monitoring unit 302 is specifically configured to monitor, when the determining unit 306 determines that the amount of data in the system is greater than the preset value, to monitor several parameters in the wireless communication network.
  • the base station 300 in the LAA system, can flexibly adjust the first scheduling mode of the uplink data scheduling currently performed by the terminal according to the result of monitoring the parameters in the wireless communication network, that is, according to different The scenario dynamically converts two different scheduling modes. Regardless of whether the LBT fails or succeeds, the base station reasonably selects the scheduling mode, improves the scheduling success rate, avoids excessive signaling overhead, and reduces the data transmission error rate, thereby improving system performance.
  • FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal may be used to perform some or all of the steps in the method shown in FIG. 2. For details, refer to the description in FIG. I will not repeat them here.
  • the terminal 400 can include:
  • the first sending unit 401 is configured to send uplink data to the base station according to the first scheduling manner in which the terminal currently performs uplink scheduling, where the first scheduling manner includes self-scheduling or cross-carrier scheduling;
  • the receiving unit 402 is configured to receive control information that is sent by the base station and that carries the adjusted scheduling mode, where the control information is used to instruct the terminal to switch the first scheduling mode to the adjusted Degree mode
  • the second sending unit 403 is configured to send uplink data to the base station according to the adjusted scheduling manner.
  • the manner in which the first sending unit 401 sends uplink data to the base station according to the first scheduling manner in which the terminal performs uplink scheduling is specifically:
  • the first scheduling mode is the self-scheduling, sending uplink data to the base station on a physical uplink shared channel PUSCH of the local cell of the terminal;
  • the uplink data is sent to the base station on the physical uplink shared channel PUSCH of the local cell of the terminal.
  • the terminal 400 shown in FIG. 4 may further include a listening unit 404.
  • the monitoring unit 404 is configured to perform monitoring of a physical downlink control channel PDCCH in the local cell of the terminal when the first scheduling mode is the self-scheduling; or
  • the monitoring unit 404 is further configured to: when the first scheduling mode is the cross-carrier scheduling, perform monitoring of a physical downlink control channel PDCCH in a scheduling cell of the terminal.
  • the control information further includes at least one of resource allocation information, frequency modulation information, and modulation and coding mode information.
  • the terminal 400 shown in FIG. 4 may further include
  • the third sending unit 405 is configured to send an uplink data scheduling request to the base station, to trigger the base station to say according to the received uplink data scheduling request and the downlink listening in the unlicensed frequency band monitored by the base station.
  • the state of the LBT mechanism determines the adjusted scheduling mode.
  • the location of the physical downlink control channel PDCCH may be determined according to the adjusted scheduling manner (self-scheduling or cross-carrier scheduling) indicated in the received control information.
  • the physical downlink control channel PDCCH is monitored in the local cell or the scheduling cell of the terminal, which can reduce the range in which the terminal monitors the PDCCH, reduce the complexity of the busy monitoring of the terminal, and reduce the power consumption of the terminal.
  • FIG. 5 is a schematic structural diagram of another base station according to an embodiment of the present invention, where the base station may be used to perform some or all of the steps in the method shown in FIG. The description is not repeated here.
  • the base station 500 can include a processor 501, a transmitter 502, and a memory 503.
  • the structure of the base station shown in FIG. 5 does not constitute a limitation of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more or less components than those shown in FIG. 5, or a combination thereof. Some components, or different component arrangements.
  • the processor 501 is a control center of the base station, and connects various parts of the entire base station by using various interfaces and lines, by running or executing programs and/or modules stored in the memory 503, and calling data stored in the memory 503. To perform various functions and processing data of the base station.
  • the processor 501 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions.
  • the processor 501 may include only a central processing unit (CPU), or may be a CPU, a digital signal processor (DSP), or a graphics processing unit (GPU). And a combination of various control chips.
  • the CPU may be a single operation core, and may also include multiple operation cores.
  • the memory 503 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 503 can also optionally be at least one storage device located remotely from the processor 501.
  • the processor 501 is configured to invoke a program stored in the memory 503, and perform the following operations:
  • Determining a first scheduling mode for the terminal to perform uplink data scheduling where the first scheduling mode includes self-scheduling or cross-carrier scheduling;
  • the uplink scheduling is performed for the terminal by using the adjusted scheduling mode.
  • the processor 501 dynamically adjusts the first scheduling manner according to the result of monitoring the parameters in the wireless communication network, including:
  • the self-scheduling is switched to the cross-carrier scheduling
  • the cross-carrier scheduling switch is the self-scheduling.
  • the processor 501 dynamically adjusts the first scheduling manner according to the result of monitoring the parameters in the wireless communication network, including:
  • the processor 501 dynamically adjusts the first scheduling manner according to the result of monitoring the parameters in the wireless communication network, including:
  • the sending, by the processor 501, the control information that is sent by the transmitter 502 to the terminal and that is used to indicate the adjusted scheduling manner includes:
  • the control information that is used to indicate the adjusted scheduling mode is sent to the terminal on the downlink control channel PDCCH of the local cell of the terminal; or ,
  • the control information that is used to indicate the adjusted scheduling mode is sent to the terminal on a downlink control channel PDCCH of the scheduling cell of the terminal.
  • the control information further includes resource allocation information, frequency modulation information, and modulation and coding mode. At least one of the information.
  • the processor 501 is further configured to: after determining that the terminal is currently performing the uplink scheduling of the uplink data scheduling, invoke the program stored in the memory 503, and perform the following operations:
  • the base station 500 described in FIG. 5 in the LAA system, can flexibly adjust the first scheduling mode of the uplink data scheduling currently performed by the terminal according to the result of monitoring the parameters in the wireless communication network, that is, according to different The scenario dynamically converts two different scheduling modes. Regardless of whether the LBT fails or succeeds, the base station reasonably selects the scheduling mode, improves the scheduling success rate, avoids excessive signaling overhead, and reduces the data transmission error rate, thereby improving system performance.
  • FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • the terminal shown in FIG. 6 is used to perform some or all of the steps in the method shown in FIG. The description in the description will not be repeated here.
  • the terminal 600 can include a processor 601, a receiver 602, a transmitter 602, and a memory 604.
  • the structure of the terminal shown in FIG. 6 does not constitute a limitation of the present invention. It may be a bus-shaped structure or a star-shaped structure, and may include more or less components than those shown in FIG. 6, or a combination thereof. Some components, or different component arrangements.
  • the terminal may include, but is not limited to, a smart phone, a notebook computer, a personal computer (PC), a personal digital assistant (PDA), and a mobile internet device (Mobile Internet Device). , MID), smart wearable devices (such as smart watches, smart bracelets) and other terminals.
  • the processor 601 is a control center of the terminal, and connects various parts of the entire terminal by using various interfaces and lines, by running or executing programs and/or modules stored in the memory 604, and calling data stored in the memory 604, To perform various functions of the terminal and process data.
  • the 601 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs having the same function or different functions.
  • the processor 601 may include only a central processing unit (CPU), or may be a CPU, a digital signal processor (DSP), or a graphics processing unit (GPU). And a combination of various control chips.
  • the CPU may be a single operation core, and may also include multiple operation cores.
  • the memory 604 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 604 can optionally also be at least one storage device located remotely from the aforementioned processor 601.
  • the processor 601 is configured to invoke a program stored in the memory 604, and perform the following operations:
  • control information that is sent by the base station and that carries the adjusted scheduling mode, where the control information is used to indicate that the terminal switches the first scheduling mode to the adjusted scheduling mode;
  • the uplink data is sent to the base station by the transmitter 603 according to the adjusted scheduling manner.
  • the sending, by the processor 601, the uplink data by using the transmitter 603 to the base station according to the first scheduling mode in which the terminal is currently performing uplink scheduling includes:
  • the first scheduling mode is the self-scheduling, sending uplink data to the base station on a physical uplink shared channel PUSCH of the local cell of the terminal;
  • the uplink data is sent to the base station on the physical uplink shared channel PUSCH of the local cell of the terminal.
  • the processor 601 is further configured to invoke a program stored in the memory 604, and perform the following operations:
  • the physical downlink control channel PDCCH is monitored in the local cell of the terminal.
  • the scheduling of the physical downlink control channel PDCCH is performed on the scheduling cell of the terminal.
  • the control information further includes at least one of resource allocation information, frequency modulation information, and modulation and coding mode information.
  • the processor 601 is further configured to invoke a program stored in the memory 604, and perform the following operations:
  • the state of the adjustment determines the adjusted scheduling mode.
  • the location of the physical downlink control channel PDCCH may be determined according to the adjusted scheduling manner (self-scheduling or cross-carrier scheduling) indicated in the received control information.
  • the physical downlink control channel PDCCH is monitored in the local cell or the scheduling cell of the terminal, which can reduce the range in which the terminal monitors the PDCCH, reduce the complexity of the busy monitoring of the terminal, and reduce the power consumption of the terminal.
  • FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the communication system 700 can include a base station 701 and a terminal 702, which can be the base station described in FIG. 3 and FIG. 5, and the terminal 702 can be the terminal described in FIG. 4 or FIG.
  • the base station 701 can be used to perform the method described in FIG. 2.
  • the terminal 702 can be used to perform the method described in FIG. 2, and the specific process is not described here. Narration.
  • the disclosed apparatus may be implemented in other ways.
  • 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 may be Integrate 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 an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • 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 a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a memory. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing memory includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like, which can store program codes.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne, dans certains modes de réalisation, un procédé de transmission d'informations de commande, un équipement et un système de communication. Le procédé consiste à : déterminer un premier mode de planification pour effectuer une planification actuelle de données de liaison montante pour un terminal, le premier mode de planification comprenant une autoplanification ou une planification interporteuses ; surveiller plusieurs paramètres dans un réseau de communication sans fil ; ajuster dynamiquement le premier mode de planification en fonction du résultat de la surveillance des plusieurs paramètres dans le réseau de communication sans fil ; envoyer les informations de commande qui transportent le mode de planification pour indiquer le mode de planification ajusté au terminal ; et adopter par la suite le mode de planification ajusté pour effectuer une planification de données de liaison montante pour le terminal. La mise en œuvre des modes de réalisation de la présente invention peut améliorer les performances du système.
PCT/CN2017/085928 2016-08-10 2017-05-25 Procédé de transmission d'informations de commande, équipement, et système de communication WO2018028271A1 (fr)

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