WO2021030980A1 - 一种通信方法、通信装置和系统 - Google Patents

一种通信方法、通信装置和系统 Download PDF

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Publication number
WO2021030980A1
WO2021030980A1 PCT/CN2019/101136 CN2019101136W WO2021030980A1 WO 2021030980 A1 WO2021030980 A1 WO 2021030980A1 CN 2019101136 W CN2019101136 W CN 2019101136W WO 2021030980 A1 WO2021030980 A1 WO 2021030980A1
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WIPO (PCT)
Prior art keywords
information
semi
indication information
resource
secondary cell
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PCT/CN2019/101136
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English (en)
French (fr)
Inventor
肖洁华
李新县
唐浩
王轶
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/101136 priority Critical patent/WO2021030980A1/zh
Priority to EP19942259.3A priority patent/EP4017158A4/en
Priority to CN201980097410.3A priority patent/CN113950856A/zh
Publication of WO2021030980A1 publication Critical patent/WO2021030980A1/zh
Priority to US17/651,181 priority patent/US20220174686A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method, communication device and system.
  • the aggregated carriers include multiple CCs (component carriers, carrier units), and the multiple CCs include a primary carrier and one or more secondary carriers.
  • carrier aggregation multiple continuous or discontinuous carrier units can be aggregated for use.
  • the 5th generation mobile communication radio technology (the 5th generation mobile communication technology new radio, 5G NR) system also defines other frequency resources, such as bandwidth Part (bandwidth part, BWP) solves the demand for flexible bandwidth usage in mobile communications and improves the utilization of scattered spectrum in the wireless frequency band.
  • bandwidth Part bandwidth Part
  • a downlink carrier unit often corresponds to an independent cell.
  • the primary carrier corresponds to the primary cell
  • the secondary carrier corresponds to the secondary cell.
  • the terminal equipment can transmit data between the primary cell and the network equipment. Data can be transmitted between the secondary cell and network equipment.
  • the secondary cell needs to be activated before it can be used for data transmission.
  • the network side can deactivate the secondary cell through a deactivation command.
  • the terminal device when the BWP is not activated, the terminal device completes the activation of the secondary cell by measuring the periodic channel state information-reference signal (CSI-RS) resource and reporting a valid CSI report.
  • CSI-RS periodic channel state information-reference signal
  • the configuration of CSI-RS resources needs to be modified through radio resource control (Radio Resource Control, RRC) signaling reconfiguration, which is slow in scheduling.
  • RRC Radio Resource Control
  • the CSI-RS period used to activate the secondary cell is generally configured to be relatively short, but after the cell activation is completed, if the reconfiguration is not performed through RRC signaling Modified, CSI-RS resources will always be transmitted on the air interface according to the shorter period previously configured, which causes CSI-RS to still be intensively transmitted on the air interface in a shorter period, resulting in a waste of air interface resources and reducing air interface transmission If it is modified through RRC signaling reconfiguration, it will increase the system measurement delay.
  • the present application provides a communication method, communication device, and system, by which the above-mentioned contradiction between the activation delay of the secondary cell and the air interface resource utilization rate can be avoided.
  • the present application provides a communication method, the method includes: a terminal device receives first information, the first information is used to activate a first secondary cell; the terminal device uses the first half in the activation process of the first secondary cell Continuous CSI-RS resources for channel state information CSI measurement.
  • the terminal device when the BWP is not activated, the terminal device can complete the activation of the secondary cell through the semi-persistent CSI-RS resource, which improves the utilization of the semi-persistent CSI-RS resource, because the semi-persistent CSI-RS resource is activated
  • the state and the deactivation state can be set through MAC CE signaling or DCI, so this method can achieve flexible activation and deactivation of secondary cells.
  • the first information may include first indication information and second indication information.
  • the first indication information is used to indicate activation of the first secondary cell; the second indication information is used to indicate activation of the first semi-persistent CSI- RS resources.
  • the first indication information and the second indication information may be carried in the same first control information, and the first control information may be MAC CE signaling or DCI.
  • the period of the activated first semi-persistent CSI-RS resource indicated by the second indication information is smaller than other activated semi-persistent CSI-RS resources or periodic CSI-RS resources.
  • the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first semi-persistent CSI-RS resource corresponding to the second indication information, so the terminal device activates the first secondary cell, During the activation process, the first semi-persistent CSI-RS resource is used for CSI measurement, and the terminal device uses the first CSI report resource to send a CSI report on the primary cell or on the activated secondary cell to complete the activation of the first secondary cell .
  • the first control information is MAC CE signaling;
  • MAC CE signaling includes the following information fields: secondary cell indication field and semi-persistent CSI-RS resource group field.
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information.
  • the network device can combine the first indication information and the second indication information in a single MAC CE signaling, so the use process of semi-persistent CSI-RS resources in the secondary cell activation process can be simplified, thereby Reduce the activation delay of SCell.
  • this method can support the use of semi-persistent CSI-RS resources in the SCell activation process. Because the activation and deactivation status of semi-persistent CSI-RS resources can be set through MAC CE signaling, this method can achieve flexibility. Activate and deactivate the secondary cell, thereby improving the utilization rate of air interface resources, and also improving the utilization rate of semi-persistent CSI-RS resources.
  • the first control information is MAC CE signaling;
  • MAC CE signaling includes the following information fields: secondary cell indication field, semi-persistent CSI-RS resource group field, and semi-persistent CSI report configuration field.
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information
  • the semi-persistent CSI report configuration field is used to carry the third indication information.
  • the network equipment can combine the first indication information and the second indication information, or the first indication information, the second indication information, and the third indication information in a single MAC CE signaling, which can simplify The use process of semi-persistent CSI-RS resources in the activation process of the secondary cell, thereby reducing the activation delay of the SCell.
  • this method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation and deactivation states of semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through MAC
  • the CE signaling is set, so this method can flexibly activate and deactivate secondary cells, thereby improving the utilization of air interface resources.
  • the first information is carried in the downlink control information DCI; the method further includes: the terminal device determines the first semi-persistent CSI-RS resource corresponding to the default index.
  • the embodiment of the present application due to the limitation of the information bits in the DCI, the embodiment of the present application can simplify the content in the DCI carrying the first information in the above-mentioned manner.
  • the first control information is DCI; the method further includes: the terminal device determines the first secondary cell corresponding to the first indication information; the terminal device determines the first semi-persistent CSI corresponding to the second indication information -RS resource; the terminal device determines the first semi-persistent CSI report resource corresponding to the third indication information.
  • the network device can combine the first indication information, the second indication information, and the third indication information in one DCI, so the use of semi-persistent CSI-RS resources in the activation process of the secondary cell can be simplified Process, thereby reducing the activation delay of SCell.
  • the method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation status and deactivation status of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through DCI Therefore, the method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources.
  • this implementation method can more effectively reduce the activation delay of the secondary cell.
  • the DCI format format of DCI is DCI format1-0, and the DCI also includes an information field for setting a value, and the information field for setting a value is used to indicate that the DCI is used to activate the first secondary cell;
  • the total number of DCI bits used to activate the first secondary cell is the same as the total number of DCI bits used for downlink data scheduling and DCI format 1-0.
  • the existing DCI format is reused to carry the first information, which has high compatibility.
  • the terminal device sends hybrid automatic repeat request HARQ information, and the HARQ information is used to indicate whether the first information is received correctly.
  • the terminal device receives the second information, and the second information is used to deactivate the first secondary cell; the terminal device stops using the first semi-persistent CSI-RS resource for CSI measurement.
  • the present application also provides a communication method, the method includes: a network device sends first information, and the first information is used to activate a first secondary cell;
  • the network device receives the channel state information CSI report.
  • the CSI report is obtained by the terminal device using the first semi-persistent CSI-RS resource to perform CSI measurement during the activation process of the first secondary cell.
  • the terminal device when the BWP is not activated, can complete the activation of the secondary cell through the semi-persistent CSI-RS resource, which improves the utilization rate of the semi-persistent CSI-RS resource.
  • the activation state and the deactivation state of the CSI-RS resource can be set through MAC CE signaling or DCI, so this method can achieve flexible activation and deactivation of the secondary cell.
  • the first information includes first indication information and second indication information, the first indication information is used to indicate activation of the first secondary cell; the second indication information is used to indicate activation of the first semi-persistent CSI-RS Resources.
  • the first indication information and the second indication information may be carried in the same first control information, and the first control information may be MAC CE signaling or DCI.
  • the period of the activated first semi-persistent CSI-RS resource indicated by the second indication information is smaller than other activated semi-persistent CSI-RS resources or periodic CSI-RS resources.
  • the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first semi-persistent CSI-RS resource corresponding to the second indication information, so the terminal device activates the first secondary cell, During the activation process, the first semi-persistent CSI-RS resource is used for CSI measurement, and the terminal device uses the first CSI report resource to send a CSI report on the primary cell or on the activated secondary cell to complete the activation of the first secondary cell .
  • the first control information is MAC CE signaling;
  • MAC CE signaling includes the following information fields: secondary cell indication field and semi-persistent CSI-RS resource group field.
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information.
  • the network device can combine the first indication information and the second indication information in a single MAC CE signaling, so the use process of semi-persistent CSI-RS resources in the secondary cell activation process can be simplified, thereby Reduce the activation delay of SCell.
  • this method can support the use of semi-persistent CSI-RS resources in the SCell activation process. Because the activation and deactivation status of semi-persistent CSI-RS resources can be set through MAC CE signaling, this method can achieve flexibility. Activate and deactivate the secondary cell, thereby improving the utilization rate of air interface resources, and also improving the utilization rate of semi-persistent CSI-RS resources.
  • the first control information is MAC CE signaling;
  • MAC CE signaling includes the following information fields: secondary cell indication field, semi-persistent CSI-RS resource group field, and semi-persistent CSI report configuration field.
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information
  • the semi-persistent CSI report configuration field is used to carry the third indication information.
  • the network equipment can combine the first indication information and the second indication information, or the first indication information, the second indication information, and the third indication information in a single MAC CE signaling, which can simplify The use process of semi-persistent CSI-RS resources in the activation process of the secondary cell, thereby reducing the activation delay of the SCell.
  • this method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation and deactivation states of semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through MAC
  • the CE signaling is set, so this method can flexibly activate and deactivate secondary cells, thereby improving the utilization of air interface resources.
  • the first information is carried in the downlink control information DCI, and the first semi-persistent CSI-RS resource is the semi-persistent CSI-RS resource corresponding to the default index.
  • the embodiment of the present application due to the limitation of the information bits in the DCI, the embodiment of the present application can simplify the content in the DCI carrying the first information in the above-mentioned manner.
  • the first secondary cell is determined by the terminal device according to the first indication information
  • the first semi-persistent CSI-RS resource is determined according to the second indication information
  • the first semi-persistent CSI-RS resource is determined according to the first indication information. Three instructions are confirmed.
  • the network device can combine the first indication information, the second indication information, and the third indication information in one DCI, so the use of semi-persistent CSI-RS resources in the activation process of the secondary cell can be simplified Process, thereby reducing the activation delay of SCell.
  • the method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation status and deactivation status of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through DCI Therefore, the method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources.
  • this implementation method can more effectively reduce the activation delay of the secondary cell.
  • the DCI format format of DCI is DCI format1-0, and the DCI also includes an information field for setting a value, and the information field for setting a value is used to indicate that the DCI is used to activate the first secondary cell;
  • the total number of DCI bits used to activate the first secondary cell is the same as the total number of DCI bits used for downlink data scheduling and DCI format 1-0.
  • the existing DCI format is reused to carry the first information, which has high compatibility.
  • the terminal device sends hybrid automatic repeat request HARQ information, and the HARQ information is used to indicate whether the first information is received correctly.
  • the network device sends second information, and the second information is used to deactivate the first secondary cell.
  • an embodiment of the present application provides an apparatus.
  • the foregoing apparatus includes one or more processors and communication units.
  • the one or more processors are configured to support the apparatus to perform corresponding functions of the network device in the above method.
  • the first indication information is generated.
  • the communication unit is used to support the device to communicate with other devices, and realize the receiving and/or sending functions. For example, sending the first instruction information.
  • the device may further include one or more memories, where the memories are configured to be coupled with the processor, and store necessary program instructions and/or data for the network device.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
  • the device may be a base station, gNB or TRP, etc.
  • the communication unit may be a transceiver, or a transceiver circuit.
  • the transceiver may also be an input/output circuit or interface.
  • the device may also be a communication chip.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the above device includes a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to run the computer program in the memory so that the apparatus executes the network device in the second aspect or any one of the possible implementations of the second aspect The method of completion.
  • the foregoing device includes one or more processors and communication units.
  • the one or more processors are configured to support the apparatus to perform corresponding functions of the terminal device in the foregoing method. For example, determine the second parameter.
  • the communication unit is used to support the device to communicate with other devices, and realize the receiving and/or sending functions. For example, receiving the first indication information.
  • the device may further include one or more memories, where the memory is used for coupling with the processor and stores necessary program instructions and/or data for the device.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
  • the device may be a smart terminal or a wearable device, etc.
  • the communication unit may be a transceiver or a transceiver circuit.
  • the transceiver may also be an input/output circuit or interface.
  • the device may also be a communication chip.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the above device includes a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to run the computer program in the memory so that the device executes the first aspect or any one of the possible implementations of the first aspect. The method of equipment completion.
  • a system which includes the aforementioned terminal device and network device.
  • a computer-readable storage medium for storing a computer program, and the computer program includes instructions for executing the method in the first aspect or any one of the possible implementation manners of the first aspect.
  • a computer-readable storage medium for storing a computer program, the computer program including instructions for executing the second aspect or any one of the possible implementation manners of the second aspect.
  • a computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute any one of the first aspect or the first aspect. The method in the possible implementation mode.
  • a computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute any one of the above second aspect and the second aspect The method in the possible implementation mode.
  • the method provided in the embodiments of the present application can provide a method for determining power and/or power headroom in a multi-beam scenario, which is suitable for power control or power headroom reporting in a multi-beam scenario, for example, for NR systems Power control or power headroom report.
  • FIG. 1A and 1B are schematic diagrams of a possible network architecture provided by this application.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram of the relationship between download waves and cells in a CA scenario provided by an embodiment of this application;
  • Figure 4 is a MAC CE signaling structure provided by an embodiment of this application.
  • Figure 5A is another MAC CE signaling structure provided by an embodiment of this application.
  • 5B and 5C are schematic diagrams of CSI-RS resources and CSI report resources provided by embodiments of the application;
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • LTE long term evolution
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation of the future
  • NR new-generation radio access technology
  • 6G systems future communication systems, such as 6G systems.
  • the term "exemplary” is used to indicate an example, illustration, or illustration. Any embodiment or design solution described as an "example” in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. Rather, the term example is used to present the concept in a concrete way.
  • information, signal, message, and channel can sometimes be used together. It should be noted that the meanings to be expressed are the same when the differences are not emphasized. “ ⁇ (of)”, “corresponding (relevant)” and “corresponding” can sometimes be used together. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • Multiple refers to two or more.
  • the following at least one item (a) or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • the embodiments of the present application may be applied to a time division duplex (time division duplex, TDD) scenario, and may also be applicable to a frequency division duplex (frequency division duplex, FDD) scenario.
  • TDD time division duplex
  • FDD frequency division duplex
  • the embodiments of the present application can be applied to traditional typical networks, and can also be applied to future UE-centric networks.
  • the UE-centric network introduces a non-cell network architecture, that is, a large number of small stations are deployed in a specific area to form a hyper cell, and each small station is a transmission point of the Hyper cell ( Transmission Point (TP) or TRP, and is connected to a centralized controller (controller).
  • TP Transmission Point
  • TRP Transmission Point
  • the network side device selects a new sub-cluster (subcluster) for the UE to serve it, thereby avoiding real cell switching and realizing UE service continuity.
  • the network side device includes a wireless network device.
  • FIG. 1A shows a schematic diagram of a communication system suitable for the communication method of an embodiment of the present application.
  • FIG. 1A shows a schematic diagram of a communication system suitable for the communication method of an embodiment of the present application.
  • FIG. 1A is a schematic diagram of a network architecture in a carrier aggregation scenario to which this application is applicable.
  • the network architecture includes a network device 100 and a terminal device 120, and two downlink carrier units: CC1 and CC2, and CC1 and CC2 of the network device 100 Work on different frequencies.
  • the terminal device 120 may be a wireless terminal device capable of receiving network device scheduling and instruction information.
  • the wireless terminal device may be a device that provides voice and/or data connectivity to the user, or a handheld device with wireless connection function, or a wireless terminal device connected to a wireless device. Other processing equipment for the modem.
  • the terminal device can communicate with one or more core networks or the Internet via a radio access network (e.g., radio access network, RAN).
  • the terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone, mobile phone). (mobile phone)), computers and data cards, for example, may be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network.
  • Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station (remote station), access point ( access point, AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (subscriber station, SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc.
  • the terminal device can also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G network or a terminal device in a future evolution public land mobile network (PLMN) network, and a terminal in the NR communication system Equipment etc.
  • PLMN public land mobile network
  • the network device (for example, a macro base station) 100 is an entity used to transmit or receive signals on the network side, and the network device may be a device used to communicate with a mobile device.
  • the network equipment can be an AP in a wireless local area network (WLAN), an evolved base station (evolutional Node B, eNB or eNodeB) in a long term evolution (LTE), or a relay station or an access point , Or in-vehicle equipment, wearable equipment, and network equipment in the future 5G network or the network equipment in the future evolved public land mobile network (PLMN) network, or the generation Node B in the NR system , GNodeB) etc.
  • WLAN wireless local area network
  • eNB evolved base station
  • LTE long term evolution
  • PLMN public land mobile network
  • the network equipment provides services for the cell
  • the terminal equipment communicates with the network equipment through the communication resources (for example, frequency domain resources, or spectrum resources) used by the cell
  • the cell may be a network equipment (
  • the cell corresponding to the base station.
  • the cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: Metro cell, Micro cell, and Pico cell. Pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • the network device may be another device that provides wireless communication functions for the terminal device.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • a device that provides a wireless communication function for a terminal device is called a network device.
  • FIG. 1B is a schematic diagram of a network architecture in a dual-connectivity (DC) scenario to which this application applies.
  • the architecture includes two cell groups: a master cell group (master cell group, MCG) and a secondary cell group (secondary cell group). cell group, SCG).
  • MCG master cell group
  • SCG secondary cell group
  • the MCG includes a primary cell (primary cell, PCell) or additionally includes one or more secondary cells (secondary cell, SCell), and the SCG includes a primary and secondary cell (primary secondary cell, PSCell) or additionally includes one or more SCells.
  • the network device that manages the MCG is called the main network device or the main node, and the network device that manages the SCG is called the auxiliary network device or the auxiliary node.
  • the 5G cell can be used as a macro coverage network (as a main network device), or as a small station (as a secondary network device) to cover and enhance the existing LTE network.
  • a macro coverage network as a main network device
  • a small station as a secondary network device
  • dual connectivity technology can be used to realize the interconnection of LTE and 5G systems, thereby improving the radio resource utilization of the entire mobile network system, reducing the delay of system switching, and improving user and system performance.
  • the primary network equipment may be one of LTE network equipment (such as eNB), 5G network equipment (such as gNB) or future communication network equipment
  • the auxiliary network equipment may also be LTE network equipment, 5G network equipment or future
  • One of the communication network equipment, and the main network equipment and the auxiliary network equipment can be network equipment of the same standard, such as both eNBs, or network equipment of different standards, for example, the main network equipment is an eNB, and the auxiliary network equipment is a gNB .
  • This application does not limit the communication standards of the main network device and the auxiliary network device.
  • FIGS. 1A and 1B are only simplified schematic diagrams for ease of understanding.
  • the communication system may further include other network devices or other terminal devices, which are not shown in FIGS. 1A and 1B.
  • CA Carrier Aggregation
  • Carrier aggregation is the aggregation of two or more component carriers (CC) to support a larger transmission bandwidth.
  • one downlink carrier unit corresponds to an independent cell.
  • one downlink carrier unit can be equivalent to one cell.
  • a cell can include one downlink carrier and one uplink carrier, or only one downlink carrier.
  • the downlink carrier and the uplink carrier are on the same carrier.
  • carrier aggregation supports aggregation between different carrier units.
  • the different carrier units mentioned here can be carrier units of the same or different bandwidths, or adjacent or non-adjacent carrier units in the same frequency band, or carrier units in different frequency bands. Based on this, carrier aggregation can be divided into intra-band continuous carrier aggregation, same frequency band discontinuous carrier aggregation, and different frequency band discontinuous carrier aggregation.
  • the carrier unit corresponding to a primary cell is called a primary component carrier (PCC).
  • PCell primary component carrier
  • DL PCC downlink carrier of PCell
  • UL PCC uplink carrier of PCell
  • the PCell may be the cell where the terminal device is initially connected, or the cell where the RRC connection is reestablished, or it may be the primary cell designated during the cell handover (handover) process.
  • PCell is responsible for RRC communication with terminal equipment.
  • the carrier unit corresponding to the SCell (secondary cell, secondary cell) is called a secondary component carrier (SCC).
  • SCC secondary component carrier
  • the downlink carrier of the SCell is called DL SCC
  • the uplink carrier of the SCell is called UL SCC.
  • the SCell is added during RRC reconfiguration to provide additional radio resources.
  • the SCell can be added/modified/released in the RRC Connection Reconfiguration message (RRC Connection Reconfiguration) after the initial security activation procedure (initial security activation procedure). There is no RRC communication between the SCell and the terminal device.
  • Serving cell is a cell that provides services (uplink and downlink transmission) for terminal equipment. If the terminal device is in the RRC connection (RRC_CONNECTED) state but CA is not configured, the terminal device has only one serving cell, namely PCell; if the terminal device is in the RRC_CONNECTED state and configured with CA, the serving cell of the terminal device includes PCell and all SCell. In other words, serving cell can refer to both PCell and SCell. Both PCell and SCell are serving cells.
  • Dual connectivity means that at least two carriers used for aggregation are on different base stations.
  • the primary base station and the secondary base station there is at least one carrier on each of the primary base station and the secondary base station, which are the primary cell and the primary and secondary cells respectively. There may be other secondary carriers on the primary base station and the secondary base station.
  • the terminal equipment can communicate with the network through the primary base station and the secondary base station.
  • PCell Primary cell
  • the primary cell may be the cell where the terminal device performs the initial connection establishment, or the primary cell may be the cell where the terminal device performs radio resource control (Radio Resource Control, RRC) connection reestablishment, or the primary cell may be in the handover process.
  • the primary cell is mainly used for RRC communication with terminal equipment.
  • the carrier unit corresponding to the primary cell is called the primary component carrier (PCC)
  • the downlink carrier of the primary component carrier is called the downlink primary carrier unit (downlink PCC, DL PCC)
  • the uplink carrier of the primary carrier unit is called the uplink primary carrier.
  • Carrier unit uplink PCC, UL PCC
  • the primary carrier unit may also be referred to as primary carrier. In the embodiments of the present application, the primary carrier is taken as an example for description.
  • secondary cell secondary cell
  • the secondary cell is mainly used to provide additional wireless resources. For example, there is no RRC communication between the secondary cell and the UE.
  • the secondary cell may be added during RRC reconfiguration.
  • the carrier unit corresponding to the secondary cell becomes a secondary component carrier (SCC).
  • the downlink carrier of the secondary carrier unit is called downlink secondary carrier unit (downlink SCC, DL SCC), and the uplink carrier of the secondary carrier unit is called uplink secondary carrier unit (uplink SCC, UL SCC).
  • the secondary carrier unit may also be referred to as a secondary carrier.
  • the auxiliary carrier is taken as an example for description.
  • the primary cell may be determined when the connection is established, and the secondary cell may be added, modified or released through the RRC connection reconfiguration message after the initial access is completed.
  • the primary cell of the terminal device does not support activation or deactivation, and the primary cell of the terminal device is always in the activated state. Except for PCell, the configured SCell is not ready for use after configuration.
  • the communication system provides an activation/deactivation mechanism for SCell. Activating the SCell requires CSI measurement and reporting a valid CSI report.
  • the terminal device may perform one or more of the following operations in the carrier unit corresponding to the activated secondary cell:
  • Send sounding reference signal (sounding reference signal, SRS); report channel state information (channel state information, CSI); detect the secondary cell and the physical downlink control channel (PDCCH) transmitted on the secondary cell; if Configured to transmit the physical uplink control channel (PUCCH) on this carrier, you need to send PUCCH; start or restart the secondary cell deactivation timer (Scell deactivation timer); trigger power headroom report (PHR) ) Report etc.
  • SRS sounding reference signal
  • CSI channel state information
  • PUCCH physical downlink control channel
  • PUCCH physical uplink control channel
  • the terminal device may not perform at least the following operations in the carrier unit corresponding to the deactivated secondary cell:
  • UL-SCH uplink synchronization channel
  • RACH random access channel
  • the BWP is a configuration in the cell, before the secondary cell is activated, all BWPs configured in the secondary cell are in an inactive state. The above operations of activating the cell are all performed after the BWP is activated. When a secondary cell is activated, at least one BWP is also activated at the same time.
  • BWP is a group of continuous or non-contiguous physical resources on a carrier.
  • a physical resource can be a physical resource block (RB), or a physical resource block group (RBG), or a physical resource element (resource element, RE) etc.
  • the network device can configure one or more BWPs on a cell for the terminal device. At any time, the terminal device can activate one or more BWPs, and the terminal device and the network device send and receive data on the activated BWP.
  • the BWP may include an initial active BWP (initial active BWP) and a UE-specific BWP. On the secondary carrier, it may also include the first active BWP (first active BWP).
  • the initial activation of the BWP may refer to the BWP used for data reception or transmission by the terminal device before receiving the dedicated BWP configuration information.
  • the BWP may be configured through a broadcast message.
  • the broadcast message may include a master information block (MIB) and System information block (system information block, SIB), etc.
  • the initial activated BWP may refer to the BWP used for initial access, etc.
  • the initial activation of the BWP may include the initial activation of the downlink BWP (initial downlink BWP) and the initial activation of the uplink BWP (initial uplink BWP).
  • the UE-specific BWP refers to the BWP used for data reception or transmission after the terminal device completes the initial access and receives the dedicated BWP configuration information.
  • the dedicated BWP configuration information may be RRC.
  • 4 BWPs may be configured on a serving cell, and the 4 BWPs may not include the initially activated BWP configured through the broadcast message. At any time, one or more BWPs can be activated, and the activated BWP can be called an activated BWP.
  • the network device may send downlink control information (DCI) to the terminal device.
  • DCI downlink control information
  • the DCI may be used to indicate the activation of the BWP
  • the activated BWP may be the aforementioned UE-specific BWP.
  • Network equipment and terminal equipment can communicate on the above activated BWP to transmit ultra-reliable and low-latency communications (URLLC) services, enhanced mobile broadband (eMBB) services, and Internet of Vehicles (vehicle to everything, V2X) services and machine-type communication (machine-type communication, MTC) positioning, etc.
  • the BWP may be a service-specific BWP, such as a side link BWP only used for V2X services.
  • Media access control layer control element (media access control control element, MAC CE)
  • MAC CE signaling is control information that network equipment and terminal equipment interact through the MAC layer.
  • the activation and deactivation commands of the existing secondary cell are instructed by the network device by sending the activation/deactivation MAC CE to the terminal device.
  • the terminal device can activate the SCell according to the information in the MAC CE.
  • the network device can deactivate one or more activated SCells through the MAC CE.
  • the terminal device can also deactivate an SCell according to the SCell deactivation timer mechanism.
  • DCI Downlink control information
  • DCI is information sent by a network device to a terminal device.
  • the network device can send DCI through the physical downlink control channel PDCCH.
  • DCI can be used to schedule uplink data transmission, or schedule downlink data transmission.
  • the communication interface between the network device and the terminal device is an air interface (Uu interface), and uplink/downlink data transmission can be performed on the Uu interface.
  • the uplink data transmission refers to data transmission from the terminal device to the network device.
  • Downlink data transmission refers to data transmission from network equipment to terminal equipment.
  • CSI-RS resources There are three types of CSI-RS resources, namely periodic CSI-RS resources, semi-persistent CSI-RS resources (semi persistent CSI-RS, SP CSI-RS) and aperiodic CSI-RS resources; there are also three types of CSI report resources. They are periodic CSI report resources, semi-persistent CSI report (semi persistent CSI report, SP CSI report) resources, and aperiodic CSI report resources.
  • the activation or deactivation status of semi-persistent CSI-RS resources and semi-persistent CSI report resources can be indicated through MAC CE signaling, while periodic CSI-RS resources can only be modified through RRC signaling.
  • the so-called activation means that the configured information becomes effective; the so-called deactivation means that the related configuration information becomes invalid.
  • the semi-persistent CSI-RS resource first configures the transmission period, but before the semi-persistent CSI-RS resource is activated by the MAC CE, the semi-persistent CSI-RS resource is in a deactivated state (also called an inactive state), and The CSI-RS is not actually transmitted.
  • the network side After the semi-persistent CSI-RS resource is activated by the MAC CE, the network side will transmit the CSI-RS according to the configured transmission period. Correspondingly, when the semi-persistent CSI-RS resource is in the activated state, after the network side deactivates the semi-persistent CSI-RS resource through the MAC CE, the network side will stop the transmission of the CSI-RS.
  • a cell only includes one downlink carrier, and the downlink carrier is an indispensable carrier for a cell
  • the "cell” and “carrier” in the embodiment of the present application can be used equivalently.
  • a "cell” is taken as an example for description.
  • words such as “first” and “second” are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order.
  • the present application provides a communication method flow, which is used to activate a secondary cell.
  • the network device in the flow may be the network device 100 in FIG. 1A, and the terminal device may be the network device 100 in FIG. 1A.
  • Terminal equipment 120 It is understandable that the functions of the network equipment can also be realized by the chips applied to the network equipment, or through other means to support the realization of the network equipment; the functions of the terminal equipment can also be realized by the chips applied to the terminal equipment, or through other Device to support terminal device implementation.
  • the specific process can be:
  • Step 201 The network device sends first information to the terminal device, where the first information is used to activate the first secondary cell.
  • the first information may be carried in control information, and the control information is, for example, MAC CE signaling or DCI.
  • the MAC CE signaling or DCI includes first indication information, and the first indication information is used to indicate activation of the first secondary cell.
  • Step 202 The terminal device receives the first information, and uses the first semi-persistent CSI-RS resource to perform CSI measurement during the activation process of the first secondary cell.
  • step 203 the terminal device sends a CSI report to the network device.
  • control information may include one or more cell activation commands, and the control information may also include one or more cell deactivation commands, or in other words, the control information may include one or more cell activation commands, It also includes one or more cell deactivation commands.
  • the activation of a secondary cell ie, the first secondary cell
  • the control information also includes the activation command or deactivation command of other secondary cells
  • the activation process or deactivation of other secondary cells The process is similar to the activation or deactivation process of the first secondary cell, and the description will not be repeated.
  • the main network The device can obtain all cell configuration information, such as the configuration information of the secondary cell on the secondary network device. Therefore, when the secondary network device needs the configuration information of these secondary cells, it can request to obtain it from the primary network device, or the primary network device actively sends the configuration information to the secondary network device.
  • the configuration information of the secondary cell includes: information of semi-persistent CSI-RS resources, and information of semi-persistent CSI report resources.
  • the terminal device when the BWP is not activated, the terminal device can complete the activation of the secondary cell through the semi-persistent CSI-RS resource, which improves the utilization rate of the semi-persistent CSI-RS resource.
  • the deactivation state can be set through MAC CE signaling or DCI, so this method can achieve flexible activation and deactivation of secondary cells.
  • the first information may also include second indication information, where the second indication information is used to indicate activation of the first semi-persistent CSI-RS resource.
  • This scenario 1 further includes the following scenario 1.1 to scenario 1.2.
  • the first indication information may be carried in one MAC CE signaling or DCI
  • the second indication information may be carried in another MAC CE signaling or DCI.
  • the first indication information and the second indication information may be carried in the same first control information, and the first control information may be MAC CE signaling or DCI.
  • the above step 202 is specifically: the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first semi-persistent CSI-RS resource corresponding to the second indication information, so the terminal device The secondary cell is activated, and during the activation process, the first semi-persistent CSI-RS resource is used for CSI measurement.
  • the above step 203 is specifically: the terminal device uses the existing configured CSI report resource to send the CSI report on the primary cell or on the activated secondary cell.
  • the period of the activated first semi-persistent CSI-RS resource indicated by the second indication information is smaller than other activated semi-persistent CSI-RS resources or periodic CSI-RS resources.
  • a terminal device uses semi-persistent CSI-RS resources with a smaller configuration period during the activation process, it can speed up the activation of secondary cells, simplify the use of semi-persistent CSI-RS resources, improve the utilization of semi-persistent CSI-RS resources, and reduce secondary cells Activation delay.
  • the first information also includes third indication information.
  • the third indication is used to indicate the activation of the first semi-persistent CSI report resource.
  • This scenario 2 further includes the following scenarios 2.1 to 2.3.
  • the first indication information can be carried in the first MAC CE signaling or the first DCI
  • the second indication information can be carried in the second MAC CE signaling or the second DCI
  • the third indication information can be carried in the third MAC CE signaling or third DCI.
  • any two of the first indication information, the second indication information, and the third indication information are carried in one MAC CE signaling or DCI, and the remaining indication information can be carried in another MAC CE signaling Or in DCI.
  • the first indication information, the second indication information, and the third indication information may all be carried in the first control information, and the first control information may be MAC CE signaling or DCI.
  • the above step 202 is specifically: the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first semi-persistent CSI-RS resource corresponding to the second indication information, so the terminal device The secondary cell is activated, and during the activation process, the first semi-persistent CSI-RS resource is used for CSI measurement.
  • the above step 203 is specifically: the terminal device determines the first CSI report resource corresponding to the third indication information, and then the terminal device uses the first CSI report resource to send the CSI on the primary cell or on the activated secondary cell. report.
  • the period of the activated first CSI report resource indicated by the third indication information is less than the period of other activated semi-persistent CSI report resources or the period of periodic CSI report resources, when the terminal device is in the activation process Using semi-persistent CSI report resources with a smaller configuration period can speed up the activation of the secondary cell and reduce the delay required for the activation process of the first secondary cell.
  • Case 3 The first information only includes the first indication information.
  • the first indication information may be carried in the DCI.
  • This scenario 3 further includes the following scenario 3.1 to scenario 3.2.
  • the above step 202 is specifically as follows: after receiving the DCI, the terminal device determines the first secondary cell corresponding to the first indication information, and in addition, the terminal device determines the first semi-persistent CSI-RS resource corresponding to the default index. Therefore, the terminal device activates the first secondary cell and uses the first semi-persistent CSI-RS resource to perform CSI measurement during the activation process.
  • the foregoing step 203 is specifically: the terminal device uses the existing configured CSI report resource to send the CSI report on the primary cell or on the activated secondary cell.
  • the above step 202 is specifically as follows: after receiving the DCI, the terminal device determines the first secondary cell corresponding to the first indication information; in addition, the terminal device determines the first semi-persistent CSI-RS resource and the second cell corresponding to the default index. Half of the continuous CSI report resources, so the terminal device activates the first secondary cell, and during the activation process, the first semi-persistent CSI-RS resource is used for CSI measurement.
  • the foregoing step 203 is specifically: the terminal device uses the first semi-persistent CSI report resource to send the CSI report on the primary cell or on the activated secondary cell.
  • the following implementation method is the specific implementation process of the above scenario 1.2
  • the following implementation method is the specific implementation process of the above scenario 2.3
  • the following realization method three and realization method four are the specific realization process of the above situation 3.2.
  • the following embodiments of the present invention take the support of a maximum of 16 cell aggregation as an example, and the number of specific supported cells can be adjusted as required, which does not limit the present invention. It should be noted that in actual applications, it is not limited to the following four implementation methods.
  • SCell 1 is the first secondary cell to be activated
  • the first semi-persistent CSI-RS resource is the resource on the DL SCC.
  • the terminal device uses The first semi-persistent CSI-RS resource on the DL SCC of the SCell 1 measures the CSI, and then the terminal device sends the CSI report through the CSI report resource on the UL CC of the PCell.
  • the first information sent by the network device to the terminal device is carried in MAC CE signaling, and the MAC CE signaling includes first indication information and second indication information.
  • the information fields in the MAC CE in Figure 4 include: secondary cell indication field, semi-persistent CSI-RS resource group field, resource group TCI status field, and reserved field.
  • Ci refers to the secondary cell indicator field, which is used to indicate the activation/deactivation state of the SCell whose index number field (SCell Index) is configured as i. If Ci is set to 1, it means that the corresponding SCell is activated; if Ci is set to 0, it means that the corresponding SCell is deactivated.
  • Semi-persistent CSI-RS resource group ID i (ie SP CSI-RS resource set ID i) refers to the semi-persistent CSI-RS resource group field, and this field contains one or more semi-persistent CSI-RS resources
  • the index of the CSI-RS resource group (also referred to as a CSI-RS resource set).
  • the CSI-RS resource here can be a non-zero power channel state information reference signal resource (Non-Zero Power Channel State Information-Reference Signal resource, NZP CSI-RS resource), so the semi-persistent CSI-RS resource group ID can be NZP CSI-
  • the index (ID) of the NZP-CSI-RS-ResourceSet of the RS resource is used to indicate that the resource group (or resource set) corresponding to the index of the ResourceSet on a specific cell should be activated or deactivated.
  • the field length of this information field is 6 bits (currently, a cell supports a maximum of 64 CSI-RS resource groups); when Ci is set to 1, it means that Ci corresponds to the semi-persistent CSI of the SP CSI-RS resource set ID i on the cell -RS resource group is activated, otherwise it means that the semi-persistent CSI-RS resource group corresponding to SP CSI-RS resource set IDi is deactivated.
  • Ci when Ci is set to 0, it can also indicate that all semi-persistent CSI-RS resource groups on the corresponding cell are deactivated.
  • Resource ID i TCI State ID refers to the resource group TCI state field, and refers to the TCI state of the CSI-RS resource in the semi-persistent CSI-RS resource group. This field contains the semi-persistent The index TCI-StateId of the TCI state of the CSI-RS resource group, which is used as the semi-persistent NZP CSI-RS resource group (set) indicated by the semi-persistent CSI-RS resource group (set) ID i Quasi-colocation (QCL) source.
  • TCI State ID0 represents the TCI state of the first resource in the SP CSI-RS resource group.
  • a semi-persistent CSI-RS resource group (also referred to as a semi-persistent CSI-RS resource set) includes at least one semi-persistent CSI-RS resource, TCI ID0 must exist.
  • the MAC CE signaling may also include the TCI State ID1 of the second resource, and so on.
  • the length of each TCI State ID of this field is 7 bits (TCI state supports up to 128 types). If the Ci field is set to 0, there may be no octet containing the TCI State ID0 field.
  • R (reversed) refers to the reserved field, which means the reserved bit, set to 0.
  • the CSI-RS resource is configured for a specific BWP on a specific cell, that is, the CSI-RS resource on a specific cell is associated with a BWP.
  • the CSI-RS resource indicated by the MAC CE or DCI is also associated with a specific downlink BWP.
  • BWP index (BWP ID) information (not shown in the figure) may be included in the indication information.
  • BWP ID BWP index
  • the indication information of the BWP may be simplified, that is, the association manner of the CSI-RS and the default BWP is used for indication.
  • the default BWP associated with the CSI-RS is the default downlink BWP, which may be the BWP corresponding to the first Active DL BWP ID in the RRC configuration. It may also be the BWP corresponding to the smallest or largest BWP ID among the default configured downlink BWP IDs.
  • This example can be understood as that the CSI-RS resource in the indication information is the CSI-RS resource associated with the default BWP.
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information.
  • the network equipment can combine the first indication information and the second indication information in one MAC CE signaling, so the use process of semi-persistent CSI-RS resources in the secondary cell activation process can be simplified, thereby reducing SCell activation delay.
  • this method can support the use of semi-persistent CSI-RS resources in the SCell activation process. Because the activation and deactivation status of semi-persistent CSI-RS resources can be set through MAC CE signaling, this method can achieve flexibility. Activate and deactivate the secondary cell, thereby improving the utilization rate of air interface resources, and also improving the utilization rate of semi-persistent CSI-RS resources.
  • SCell 1 is the first secondary cell to be activated
  • the first semi-persistent CSI-RS resource is the resource on the DL SCC
  • the first semi-persistent CSI report resource is the resource on the UL PCC.
  • the first information sent by the network device to the terminal device is carried in MAC CE signaling, and the MAC CE signaling includes first indication information, second indication information, and third indication information.
  • the information field in the MAC CE in FIG. 5A includes the secondary cell indication field, the semi-persistent CSI-RS resource group field, the TCI status field of the resource group, and the reserved field in FIG. 4, as well as the semi-persistent CSI report configuration field.
  • the secondary cell indication field, the semi-persistent CSI-RS resource group field, the TCI state field and the reserved field of the resource group in FIG. 5A reference may be made to the description of FIG. 4, which will not be repeated here.
  • the Serving Cell ID indicates a PCell or SCell with a ServingCellIndex, and the cell is an already activated cell identifier that can be used to send CSI reports.
  • the Serving Cell ID may not be included.
  • the CSI report is sent through the cell where the current uplink PUCCH is located.
  • Sj refers to the semi-persistent CSI report configuration field on the cell indicated by the Serving Cell ID. This field indicates the semi-persistent CSI report in the CSI-ReportConfigToAddModList (CSI report configuration to add mode list) of the PCell or SCell indicated by the ServingCellIndex as the ServingCell ID. The activated/deactivated status of the configuration.
  • S0 refers to the PUCCH resource used to indicate the SP CSI report in a specific BWP, and has the report configuration of the lowest CSI-ReportConfigId (CSI-Report Configuration ID) in the list of types set to semiPersistentOnPUCCH (semi-persistent to PUCCH)
  • S1 refers to the PUCCH resource used to indicate the SP CSI report in the specific BWP, and has the report configuration of the second lowest CSI-ReportConfigId. If the number of report configurations with the type set to semiPersistentOnPUCCH in a specific BWP in the list is less than j+1, the MAC entity will ignore the Sj field.
  • the Sj field is set to 1, which is used to indicate that the corresponding semi-persistent CSI report configuration will be activated.
  • the Sj field is set to 0 to indicate that the corresponding semi-persistent CSI report configuration j will be deactivated.
  • the CSI-RS resource is configured for a specific BWP on a specific cell, that is, the CSI-RS resource on a specific cell is associated with a BWP.
  • the CSI-RS resource indicated by the MAC CE or DCI is also associated with a specific downlink BWP.
  • BWP index (BWP ID) information (not shown in the figure) may be included in the indication information.
  • BWP ID BWP index
  • the indication information of the BWP may be simplified, that is, the association manner of the CSI-RS and the default BWP is used for indication.
  • the default BWP associated with the CSI-RS is the default downlink BWP, which may be the BWP corresponding to the first Active DL BWP ID in the RRC configuration. It may also be the BWP corresponding to the smallest or largest BWP ID among the default configured downlink BWP IDs.
  • the CSI-RS resource in the indication information is the CSI-RS resource associated with the default BWP.
  • the CSI report resource is configured for a specific BWP on a specific cell, that is, the CSI report resource on a specific cell is associated with a BWP.
  • the CSI report resource indicated by the MAC CE or DCI is also associated with a specific uplink BWP.
  • BWP index (BWP ID) information may be included in the indication information.
  • BWP ID BWP index
  • the default BWP associated with the CSI report resource is the default uplink BWP
  • the specific uplink BWP may be the uplink BWP indicated by the BWP ID in the MAC CE, or the BWP corresponding to the first Active UL BWP ID in the RRC configuration. It may also be the BWP corresponding to the minimum or maximum BWP ID configured on the cell indicated by the Serving Cell ID. It may also be the currently activated uplink BWP on the cell indicated by the Serving Cell ID (including the cell where the default current uplink PUCCH is located).
  • the secondary cell indication field is used to carry the first indication information
  • the semi-persistent CSI-RS resource group field is used to carry the second indication information
  • the semi-persistent CSI report configuration field is used to carry the third indication information.
  • the network equipment can combine the first indication information, the second indication information, and the third indication information in a single MAC CE signaling, so it can simplify the semi-persistent CSI-RS resources and the semi-persistent CSI report resources.
  • this method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation and deactivation states of semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through MAC
  • the CE signaling is set, so this method can flexibly activate and deactivate secondary cells, thereby improving the utilization of air interface resources.
  • the first information sent by the network device to the terminal device is carried in the DCI, and the DCI may include the first indication information, or the DCI may include the first indication information and the second indication.
  • Information, or the DCI includes first indication information, second indication information, and third indication information.
  • Example 1 The network device can use the newly designed DCI format to carry the first information, such as DCI fomat3_x.
  • Example 2 The network device can reuse the existing DCI format (format) to carry the first information, such as DCI fomat 1_0.
  • the network device can use the new RNTI scrambled DCI format encoded CRC to transmit the first information, which is briefly described as the new RNTI scrambled DCI.
  • the network device may include the first information in the DCI scrambled by the secondary cell activated RNTI (SCAct-RNTI) in the existing DCI format 1_0.
  • SCAct-RNTI secondary cell activated RNTI
  • the network device may also reuse the existing DCI format 1_1, DCI format 0_1, or DCI format 0_0 to carry the first information.
  • a new SCAct-RNTI may not be introduced to scramble the DCI information, but an existing RNTI, such as C-RNTI, may be used to scramble the DCI information.
  • the second specific implementation method the network device can indicate that the DCI contains the first information in the information field in the DCI structure.
  • the verification domain of the DCI information can use HARQ process number (HARQ process number) or redundancy version (Redundancy version, RV), modulation and coding strategy (MCS), and time domain resource assignment (TDRA)
  • HARQ process number or redundancy version (Redundancy version, RV)
  • MCS modulation and coding strategy
  • TDRA time domain resource assignment
  • new data indicator new data indicator
  • NDI transmit power
  • Transmit Power Control indicator field
  • Frequency Hopping Flag Frequency Hopping Flag
  • FDRA Special values all '0' or all '1'
  • the third specific implementation method the network device can use the first specific implementation method and the second specific implementation method in combination.
  • the network equipment can use the new RNTI scrambled DCI encoding process as follows (the essence is that the CRC when the information in the DCI is encoded in a certain format uses RNTI scrambled):
  • the control information composes a control information block according to a certain format (DCI format), or is called a control information sequence, such as a 0 , a 1 , a 2 , a 3 ,..., a A-1 .
  • DCI format a control information block according to a certain format
  • a control information sequence such as a 0 , a 1 , a 2 , a 3 ,..., a A-1 .
  • the CRC check information is scrambled with the corresponding RNTI (16bit) x rnti,0 ,x rnti,1 ,...,x rnti,15 to generate an information sequence c 0 ,c 1 ,c 2 ,c 3 ,...,c K-1 , the specific is to perform the following operations:
  • the DCI structure is shown in Table 2.
  • the secondary cell indication field the semi-persistent CSI-RS resource group field, the TCI status field of the resource group, and the semi-persistent CSI report configuration field in Table 2
  • the DCI structure is shown in Table 1.
  • the information fields of the DCI in Table 1 include: a secondary cell indication field, a semi-persistent CSI-RS resource group field, a TCI status field of a resource group, and a semi-persistent CSI report configuration field.
  • a secondary cell indication field For the secondary cell indication field, the semi-persistent CSI-RS resource group field, the TCI status field of the resource group, and the semi-persistent CSI report configuration field in Table 1, reference may be made to the specific descriptions of FIG. 4 and FIG. 5A, and details are not repeated here.
  • FDRA when FDRA is not all 1s, it is used to indicate frequency resources, and when FDRA is all '1's, it is used to indicate that the downlink control information is the first control information.
  • this embodiment of the present application may simplify the content in the DCI carrying the first information in the following manner.
  • the existing DCI needs to occupy 6 bits to carry the CSI-RS resource indicated by any one of the 64 semi-persistent CSI-RS resource group IDs.
  • only 1 bit may be occupied in the DCI to carry The semi-persistent CSI-RS resource group corresponding to loweset 1 to 2 IDs (the lowest 1 to 2 IDs). That is, the DCI only includes the semi-persistent CSI-RS resource group corresponding to the smallest CSI-RS resource group ID on the secondary cell-specific downlink BWP indicated by the cell indication field and the indicated secondary cell-specific downlink BWP last small CSI-RS- The semi-persistent CSI-RS resource group corresponding to the RS resource group ID.
  • the TCI state ID corresponding to each CSI-RS resource group can also be simplified.
  • the existing DCI needs to occupy 4 bits to carry the CSI report resources corresponding to the 4 CSI report resource IDs.
  • only 1 bit is occupied in the DCI to carry loweset1 to 2 CSI report resource IDs (lowest 1 to 2 IDs) corresponding to the CSI report resource. That is, the DCI only includes the semi-persistent CSI report resource corresponding to the smallest CSI report resource ID on the secondary cell specific downlink BWP indicated by the cell indication field and the indicated secondary cell specific downlink BWP corresponding to the last small CSI report resource ID CSI report resources.
  • the information corresponding to the default ID can be used.
  • the existing DCI needs to occupy 6 bits to carry the CSI-RS resource indicated by any one of the 64 semi-persistent CSI-RS resource group IDs.
  • the DCI does not carry the semi-persistent CSI-RS resource Information corresponding to the group field, the TCI status field of the resource group, and the semi-persistent CSI report configuration field, that is, these information fields occupy 0 bits. Therefore, the DCI may only include information indicating the DCI format, frequency resource indication information, and first indication information.
  • this figure shows the relationship diagram of the CSI-RS resource group, the CSI_RS resource, and the TCI state corresponding to the CSI-RS resource group.
  • the CSI-RS resource group corresponding to the lowest CSI-RS resource ID is used by default, and each CSI-RS resource uses the TCI state corresponding to the lowest TCI state ID, the DCI does not need to include the CSI-RS resource group ID and the corresponding TCI state ID.
  • the terminal device can determine to use CSI-RS resource 1 in CSI-RS resource group 1 and TCI state 0 of the corresponding resource according to the default relationship, and use CSI-RS resource 2 in CSI-RS resource group 1 and TCI state 0 of the corresponding resource.
  • this figure shows multiple CSI report resources.
  • the terminal device may determine to use the CSI report resource 1 for corresponding CSI report according to the default relationship.
  • the above step 202 is specifically as follows: after receiving the DCI, the terminal device uses only the smallest BWP configured by the RRC on the specific downlink BWP of the secondary cell indicated by the cell indicator field on the designated cell by default.
  • the semi-persistent CSI-RS resource corresponding to the ID, or only the semi-persistent CSI-RS resource corresponding to the smallest BWP ID and the second smallest BWP ID configured by RRC are used by default.
  • the above step 203 is specifically as follows: after receiving the DCI, the terminal device uses only the semi-persistent CSI report resource corresponding to the smallest BWP ID configured by RRC by default, or only uses the smallest BWP ID configured by RRC corresponding to the next smallest BWP ID by default. Semi-persistent CSI report resources.
  • the total number of bits in the newly designed DCI format or the total number of bits in the multiplexed DCI format needs to be equal to the total number of bits in the DCI format originally used for data scheduling. the same. That is, when the first information is sent using DCI format 3_x, the size of its DCI format 3_x must be consistent with the size of DCI format 1_0 or DCI format 1_1 used for downlink data scheduling.
  • the network device can combine the first indication information, the second indication information, and the third indication information in a DCI, thus simplifying the process of using semi-persistent CSI-RS resources in the secondary cell activation process , Thereby reducing the activation delay of SCell.
  • the method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process, because the activation status and deactivation status of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be passed through DCI Therefore, the method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources.
  • this implementation method can more effectively reduce the activation delay of the secondary cell.
  • the terminal device when the first information is carried in the DCI, can also perform a hybrid automatic repeat reQuest (hybrid automatic repeat reQuest, HARQ) feedback, that is, the terminal device sends HARQ to the network device, and the HARQ is used to indicate whether the first information is received correctly, so as to improve the reliability of sending the DCI information.
  • HARQ hybrid automatic repeat reQuest
  • this application also provides a communication method flow, which is used to deactivate a secondary cell.
  • the network device in the flow may correspond to the network device 110 in the flow shown in FIG. 1A, and the terminal device may Corresponding to the terminal device 120 in the process shown in FIG. 1A, the process includes:
  • the network device sends second information to the terminal device, where the second information is used to deactivate the first secondary cell.
  • the second information may be carried in control information, and the control information is, for example, MAC CE signaling or DCI.
  • the MAC CE signaling or DCI includes indication information indicating to deactivate the first secondary cell.
  • Step 602 The terminal device stops using the first semi-persistent CSI-RS resource to perform CSI measurement.
  • the terminal device may also perform the following first operation on the first secondary cell, and the first operation may include at least one of the following:
  • the terminal device deactivates the first secondary cell according to the second information sent by the network device, thereby achieving flexible control of the activation state or deactivation state of the secondary cell.
  • control information also includes other secondary cell deactivation commands.
  • the deactivation process of other secondary cells is similar to the activation or deactivation process of the first secondary cell, and the description will not be repeated.
  • each network element described above includes hardware structures and/or software modules corresponding to each function.
  • the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.
  • FIG. 2 and FIG. 6 can be applied independently, combined with each other or referenced.
  • FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device can be applied to the system shown in FIG. 1A to perform the functions of the terminal device in the foregoing method embodiment.
  • FIG. 7 only shows the main components of the terminal device.
  • the terminal device 120 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments, such as , Determine the precoding matrix based on the received PMI and RI, and then precode the signal and send the precoded signal.
  • the memory is mainly used to store software programs and data, for example, to store the corresponding relationship between the instruction information and the combination information described in the foregoing embodiments.
  • the control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 7 only shows one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device and execute Software program, processing the data of the software program.
  • the processor in FIG. 7 can integrate the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as buses.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 701 of the terminal device 120, for example, for supporting the terminal device to perform the receiving function and the sending function as described in the part of FIG. 2.
  • the processor with processing function is regarded as the processing unit 702 of the terminal device 120.
  • the terminal device 120 includes a transceiver unit 701 and a processing unit 702.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the device for implementing the receiving function in the transceiving unit 701 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 701 can be regarded as the sending unit, that is, the transceiving unit 701 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, an input port, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the processing unit 702 may be used to execute instructions stored in the memory to control the transceiver unit 701 to receive signals and/or send signals, and to complete the functions of the terminal device in the foregoing method embodiment.
  • the function of the transceiver unit 701 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application, for example, a schematic structural diagram of a base station.
  • the base station 800 can be applied to the system shown in FIG. 1A to perform the functions of the network device in the foregoing method embodiment.
  • the base station 800 may include one or more radio frequency units, such as a remote radio unit (RRU) 801 and one or more baseband units (BBU) (also known as digital units, digital units, DU) 802.
  • RRU 801 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 8011 and a radio frequency unit 8012.
  • the RRU 801 part is mainly used for receiving and sending of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending the signaling messages described in the foregoing embodiments to terminal equipment.
  • the BBU802 part is mainly used to perform baseband processing, control the base station, and so on.
  • the RRU 801 and the BBU 802 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 802 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU (processing unit) 802 may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the BBU 802 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access indication (such as an LTE network), and may also support different access standards. Wireless access network (such as LTE network, 5G network or other networks).
  • the BBU 802 further includes a memory 8021 and a processor 8022, and the memory 8021 is used to store necessary instructions and data.
  • the memory 8021 stores the corresponding relationship between the codebook index and the precoding matrix in the foregoing embodiment.
  • the processor 8022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the memory 8021 and the processor 8022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • FIG. 9 shows a schematic diagram of the structure of a communication device 900.
  • the apparatus 900 may be used to implement the method described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment.
  • the communication device 900 may be a chip, a network device (such as a base station), a terminal device, or other network devices.
  • the communication device 900 includes one or more processors 901.
  • the processor 901 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process software program data.
  • the communication device may include a transceiving unit to implement signal input (reception) and output (transmission).
  • the communication device may be a chip, and the transceiver unit may be an input and/or output circuit of the chip, or a communication interface.
  • the chip can be used in a terminal or a base station or other network equipment.
  • the communication device may be a terminal or a base station or other network equipment
  • the transceiver unit may be a transceiver, a radio frequency chip, or the like.
  • the communication device 900 includes one or more processors 901, and the one or more processors 901 can implement the method of the network device or the terminal device in the embodiment shown in FIG. 2.
  • the communication device 900 includes a component (means) for generating the first indication information, and a component (means) for sending the first indication information.
  • the functions of the means for generating the first indication information and the means for sending the first indication information may be realized by one or more processors.
  • the first indication information may be generated by one or more processors, and the first indication information may be sent through a transceiver, or an input/output circuit, or an interface of a chip.
  • the first indication information reference may be made to related descriptions in the foregoing method embodiments.
  • the communication device 900 includes means for receiving the first indication information, and means for determining the second parameter.
  • first indication information and how to determine the second parameter reference may be made to the related description in the foregoing method embodiment.
  • the first indication information may be received through a transceiver, or an input/output circuit, or an interface of a chip, and the second parameter may be determined through one or more processors.
  • the processor 901 may implement other functions in addition to implementing the method of the embodiment shown in FIG. 2.
  • the processor 901 may also include an instruction 903, and the instruction may be executed on the processor, so that the communication device 900 executes the method described in the foregoing method embodiment.
  • the communication device 900 may also include a circuit, and the circuit may implement the functions of the network device or the terminal device in the foregoing method embodiment.
  • the communication device 900 may include one or more memories 902, on which instructions 904 are stored, and the instructions may be executed on the processor to enable the communication device 900 to execute The method described in the above method embodiment.
  • data may also be stored in the memory.
  • the optional processor may also store instructions and/or data.
  • the one or more memories 902 may store the corresponding relationship described in the foregoing embodiment, or related parameters or tables involved in the foregoing embodiment.
  • the processor and memory can be provided separately or integrated together.
  • the communication device 900 may further include a transceiver unit 905 and an antenna 906.
  • the processor 901 may be called a processing unit, and controls a communication device (terminal or base station).
  • the transceiver unit 905 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device through the antenna 906.
  • the present application also provides a communication system, which includes the aforementioned one or more network devices, and, one or more terminal devices.
  • the processor in the embodiment of the present application may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
  • the foregoing embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination.
  • the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions or computer programs.
  • the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • 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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请涉及通信技术领域，公开一种通信方法、通信装置和系统，该方法包括：终端设备从网络设备接收第一信息，该第一信息用于激活第一辅小区，终端设备在激活第一辅小区的过程中，使用第一CSI-RS资源进行信道CSI，该方法可以有效地解决辅小区激活时延和空口资源利用率之间相矛盾的问题。

Description

一种通信方法、通信装置和系统 技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法、通信装置和系统。
背景技术
无线通信系统中，随着智能终端的用户不断增长，用户业务量和数据吞吐量也在不断增加，进而对通信带宽和速率提出了更高的要求。为此，引入了载波聚合(carrier aggregation，CA)技术，聚合的载波包含多个CC(component carrier，载波单元)，多个CC中包含一个主载波和一个或者多个辅载波。通过载波聚合可以将多个连续或不连续的载波单元聚合起来使用，此外，第五代移动通信无线电技术(the 5th generation mobile communication technology new radio，5G NR)系统还定义了其他频率资源，比如带宽部分(bandwidth part，BWP)，解决了移动通信对于灵活带宽使用的需求，并提高了无线频带中零散频谱的利用率。
在目前的载波聚合场景下，一个下行载波单元往往对应一个独立的小区，主载波对应的是主小区，辅载波对应的是辅小区，终端设备可以通过主小区与网络设备之间传输数据，也可以通过辅小区与网络设备之间传输数据。对于终端设备来说，辅小区需要激活后才能用于数据的传输，当不需要辅小区进行数据传输时，网络侧可以通过去激活命令去激活辅小区。
现有技术中，由于在BWP没有激活时，终端设备是通过测量周期信道状态信息参考信号(channel state information-reference signal，CSI-RS)资源并上报有效CSI报告来完成辅小区的激活，而周期CSI-RS资源的配置，需要通过调度速度缓慢的无线资源控制(radio resource control，RRC)信令重配进行修改。为了加快辅小区激活的过程，减少辅小区激活的时延，用于激活辅小区的CSI-RS周期一般会被配置的比较短，但是当小区激活完成后，如果不通过RRC信令重配进行修改，CSI-RS资源就会一直在空口按照之前配置的较短周期进行传输，这就造成了CSI-RS仍然会按照较短的周期在空口密集传输，造成空口资源的浪费，降低了空口传输的效率，如果通过RRC信令重配进行修改，又会增加系统测量时延。
发明内容
现有机制中采用周期CSI-RS资源来完成辅小区的激活，导致如果想降低辅小区激活时延就需要配置较短的CSI-RS周期，但是较短的CSI-RS周期又会导致辅小区激活后空口资源的浪费。
有鉴于此，本申请提供一种通信方法、通信装置和系统，通过此方法，可以避免上述辅小区激活时延和空口资源利用率之间的矛盾。
第一方面，本申请提供一种通信方法，该方法包括：终端设备接收第一信息，第一信息用于激活第一辅小区；终端设备在第一辅小区的激活过程中，使用第一半持续CSI-RS资源进行信道状态信息CSI测量。
本申请实施例中，在BWP没有激活时，终端设备可以通过半持续CSI-RS资源来完成辅小区的激活，提高了半持续CSI-RS资源的利用率，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令或DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活。
在一种可能的设计中，第一信息可以包括第一指示信息和第二指示信息，第一指示信息用于指示激活第一辅小区；第二指示信息用于指示激活第一半持续CSI-RS资源。
本申请实施例中，第一指示信息和第二指示信息可以承载于同一个第一控制信息中，该第一控制信息可以是MAC CE信令或DCI。
在一种可能的设计中，第二指示信息所指示激活的第一半持续CSI-RS资源的周期小于其它已激活的半持续CSI-RS资源或周期CSI-RS资源。当终端设备在激活过程中使用配置周期较小的半持续CSI-RS资源，可以加快辅小区激活，减小第一辅小区的激活过程所需的时延。
在一种可能的设计中，第一信息还可以包括第三指示信息，第三指示信息用于指示激活第一半持续CSI报告资源；该方法还包括：终端设备在主小区上或者在已经激活的辅小区上使用第一半持续CSI报告资源发送CSI报告。通过此设计，可以简化CSI报告资源的使用，提高半持续CSI-RS资源的利用率，降低辅小区激活时延。
本申请实施例中，终端设备确定与第一指示信息对应的第一辅小区，以及确定与第二指示信息对应的第一半持续CSI-RS资源，因此终端设备对第一辅小区进行激活，在激活过程中，使用第一半持续CSI-RS资源进行CSI测量，终端设备在主小区上或者在已经激活的辅小区上使用第一CSI报告资源发送CSI报告，以完成第一辅小区的激活。
在一种可能的设计中，第一控制信息为MAC CE信令；MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域。其中，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组域用于承载第二指示信息。
本申请实施例中，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息和第二指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率，同时也提高了半持续CSI-RS资源的利用率。
在一种可能的设计中，第一控制信息为MAC CE信令；MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域、半持续CSI报告配置域。其中，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组域用于承载第二指示信息；半持续CSI报告配置域用于承载第三指示信息。
本申请实施例中，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息和第二指示信息，或者联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。
在一种可能的设计中，第一信息承载于下行控制信息DCI中；该方法还包括：终端设 备确定默认索引对应的第一半持续CSI-RS资源。
本申请实施例中，因DCI中的信息比特受限，本申请实施例可以上述方式可以对承载第一信息的DCI中的内容进行简化。
在一种可能的设计中，第一控制信息为DCI；该方法还包括：终端设备确定与第一指示信息对应的第一辅小区；终端设备确定与第二指示信息对应的第一半持续CSI-RS资源；终端设备确定与第三指示信息对应的第一半持续CSI报告资源。
本申请实施例中，第一方面，网络设备可以在一条DCI中联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。第二方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。第三方面，因DCI的传输时延小于MAC CE信令的传输时延，所以该实现方法可以更有效地减小辅小区的激活时延。
在一种可能的设计中，DCI的DCI格式format为DCI format1-0，DCI中还包括设定取值的信息域，设定取值的信息域用于指示DCI用于激活第一辅小区；
用于激活第一辅小区的DCI的比特总数和用于下行数据调度且DCI format1-0的DCI的比特总数相同。
本申请实施例中，复用现有DCI format(格式)来承载第一信息，兼容性高。
在一种可能的设计中，终端设备发送混合自动重传请求HARQ信息，HARQ信息用于指示第一信息是否被正确接收。
在一种可能的设计中，终端设备接收第二信息，第二信息用于去激活第一辅小区；终端设备停止使用第一半持续CSI-RS资源进行CSI测量。
第二方面，本申请还提供一种通信方法，该方法包括：网络设备发送第一信息，第一信息用于激活第一辅小区；
网络设备接收信道状态信息CSI报告，CSI报告是终端设备在第一辅小区的激活过程中，使用第一半持续CSI-RS资源进行CSI测量得到的。
本申请实施例中，本申请实施例中，在BWP没有激活时，终端设备可以通过半持续CSI-RS资源来完成辅小区的激活，提高了半持续CSI-RS资源的利用率，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令或DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活。
在一种可能的设计中，第一信息包括第一指示信息和第二指示信息，第一指示信息用于指示激活第一辅小区；第二指示信息用于指示激活第一半持续CSI-RS资源。
本申请实施例中，第一指示信息和第二指示信息可以承载于同一个第一控制信息中，该第一控制信息可以是MAC CE信令或DCI。
在一种可能的设计中，第二指示信息所指示激活的第一半持续CSI-RS资源的周期小于其它已激活的半持续CSI-RS资源或周期CSI-RS资源。当终端设备在激活过程中使用配置周期较小的半持续CSI-RS资源，可以加快辅小区激活，减小第一辅小区的激活过程所需的时延。
本申请实施例中，终端设备确定与第一指示信息对应的第一辅小区，以及确定与第二指示信息对应的第一半持续CSI-RS资源，因此终端设备对第一辅小区进行激活，在激活 过程中，使用第一半持续CSI-RS资源进行CSI测量，终端设备在主小区上或者在已经激活的辅小区上使用第一CSI报告资源发送CSI报告，以完成第一辅小区的激活。
在一种可能的设计中，第一控制信息为MAC CE信令；MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域。其中，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组域用于承载第二指示信息。
本申请实施例中，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息和第二指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率，同时也提高了半持续CSI-RS资源的利用率。
在一种可能的设计中，第一控制信息为MAC CE信令；MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域、半持续CSI报告配置域。其中，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组域用于承载第二指示信息；半持续CSI报告配置域用于承载第三指示信息。
本申请实施例中，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息和第二指示信息，或者联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。
在一种可能的设计中，第一信息承载于下行控制信息DCI中，第一半持续CSI-RS资源为默认索引对应的半持续CSI-RS资源。
本申请实施例中，因DCI中的信息比特受限，本申请实施例可以上述方式可以对承载第一信息的DCI中的内容进行简化。
在一种可能的设计中，第一辅小区是终端设备根据第一指示信息确定的，第一半持续CSI-RS资源是根据第二指示信息确定的，第一半持续CSI报告资源是根据第三指示信息确定的。
本申请实施例中，第一方面，网络设备可以在一条DCI中联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。第二方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。第三方面，因DCI的传输时延小于MAC CE信令的传输时延，所以该实现方法可以更有效地减小辅小区的激活时延。
在一种可能的设计中，DCI的DCI格式format为DCI format1-0，DCI中还包括设定取值的信息域，设定取值的信息域用于指示DCI用于激活第一辅小区；用于激活第一辅小区的DCI的比特总数和用于下行数据调度且DCI format1-0的DCI的比特总数相同。
本申请实施例中，复用现有DCI format(格式)来承载第一信息，兼容性高。
在一种可能的设计中，终端设备发送混合自动重传请求HARQ信息，HARQ信息用于 指示第一信息是否被正确接收。
在一种可能的设计中，网络设备发送第二信息，第二信息用于去激活第一辅小区。
第三方面，本申请实施例提供一种装置，在一种可能的设计中，上述装置包括一个或多个处理器和通信单元。所述一个或多个处理器被配置为支持所述装置执行上述方法中网络设备相应的功能。例如，生成第一指示信息。所述通信单元用于支持所述装置与其他设备通信，实现接收和/或发送功能。例如，发送第一指示信息。
可选的，所述装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和/或数据。所述一个或多个存储器可以和处理器集成在一起，也可以与处理器分离设置。本申请并不限定。
所述装置可以为基站，gNB或TRP等，所述通信单元可以是收发器，或收发电路。可选的，所述收发器也可以为输入/输出电路或者接口。
所述装置还可以为通信芯片。所述通信单元可以为通信芯片的输入/输出电路或者接口。
另一个可能的设计中，上述装置，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于运行存储器中的计算机程序，使得该装置执行第二方面或第二方面中任一种可能实现方式中网络设备完成的方法。
在一种可能的设计中，上述装置包括一个或多个处理器和通信单元。所述一个或多个处理器被配置为支持所述装置执行上述方法中终端设备相应的功能。例如，确定第二参数。所述通信单元用于支持所述装置与其他设备通信，实现接收和/或发送功能。例如，接收第一指示信息。
可选的，所述装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存装置必要的程序指令和/或数据。所述一个或多个存储器可以和处理器集成在一起，也可以与处理器分离设置。本申请并不限定。
所述装置可以为智能终端或者可穿戴设备等，所述通信单元可以是收发器，或收发电路。可选的，所述收发器也可以为输入/输出电路或者接口。
所述装置还可以为通信芯片。所述通信单元可以为通信芯片的输入/输出电路或者接口。
另一个可能的设计中，上述装置，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于运行该存储器中的计算机程序，使得该装置执行第一方面或第一方面中任一种可能实现方式中终端设备完成的方法。
第四方面，提供了一种系统，该系统包括上述终端设备和网络设备。
第五方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序包括用于执行第一方面或第一方面中任一种可能实现方式中的方法的指令。
第六方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序包括用于执行第二方面或第二方面中任一种可能实现方式中的方法的指令。
第七方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面或第一方面中任一种可能实现方式中的方法。
第八方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第二方面及第二方面中任一种可能实现方式中的方法。
通过本申请实施例提供的方法，可以提供一种适用于多波束场景下功率和/或功率余量 确定方法，适用于多波束场景下的功率控制或功率余量上报，比如，适用于NR系统的功率控制或功率余量上报。
附图说明
图1A和图1B为本申请提供的一种可能的网络架构示意图；
图2为本申请实施例提供的一种通信方法流程示意图；
图3为本申请实施例提供的一种CA场景下载波和小区的关系示意图；
图4为本申请实施例提供的一种MAC CE信令结构；
图5A为本申请实施例提供的另一种MAC CE信令结构；
图5B和图5C为本申请实施例提供的CSI-RS资源和CSI报告资源示意图；
图6为本申请实施例提供的另一种通信方法流程示意图；
图7为本申请实施例提供的一种终端设备的结构示意图；
图8为本申请实施例提供的一种网络设备的结构示意图；
图9为本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统，全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统，未来的第五代(5th Generation，5G)系统，如新一代无线接入技术(new radio access technology，NR)，及未来的通信系统，如6G系统等。
本申请将围绕可包括多个设备、组件、模块等的系统来呈现各个方面、实施例或特征。应当理解和明白的是，各个系统可以包括另外的设备、组件、模块等，并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外，还可以使用这些方案的组合。
另外，在本申请实施例中，“示例的”一词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用示例的一词旨在以具体方式呈现概念。
本申请实施例中，信息(information)，信号(signal)，消息(message)，信道(channel)有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。“的(of)”，“相应的(corresponding，relevant)”和“对应的(corresponding)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
应理解，本文中字符“/”，一般表示前后关联对象是一种“或”的关系，但也可能表示的是一种“和/或”的关系，具体可参考前后文进行理解。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知， 随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例既可以应用于时分双工(time division duplex，TDD)的场景，也可以适用于频分双工(frequency division duplex，FDD)的场景。
本申请实施例既可以应用在传统的典型网络中，也可以应用在未来的以UE为中心(UE-centric)的网络中。UE-centric网络引入无小区(Non-cell)的网络架构，即在某个特定的区域内部署大量小站，构成一个超级小区(Hyper cell)，每个小站为Hyper cell的一个传输点(Transmission Point,TP)或TRP，并与一个集中控制器(controller)相连。当UE在Hyper cell内移动时，网络侧设备时为UE选择新的sub-cluster(子簇)为其服务，从而避免真正的小区切换，实现UE业务的连续性。其中，网络侧设备包括无线网络设备。
本申请实施例中部分场景以无线通信网络中NR网络的场景为例进行说明，应当指出的是，本申请实施例中的方案还可以应用于其他无线通信网络中，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。
为便于理解本申请实施例，首先以图1A中示出的通信系统为例详细说明适用于本申请实施例的通信系统。图1A示出了适用于本申请实施例的通信方法的通信系统的示意图。为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。其中，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
图1A为本申请所适用的一种载波聚合场景下的网络架构示意图，该网络架构包括一个网络设备100和终端设备120，以及2个下行载波单元：CC1和CC2，网络设备100的CC1和CC2在不同的频率上工作。
终端设备120可以是能够接收网络设备调度和指示信息的无线终端设备，无线终端设备可以是指向用户提供语音和/或数据连通性的设备，或具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。终端设备可以经无线接入网(如，radio access network，RAN)与一个或多个核心网或者互联网进行通信，终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话，手机(mobile phone))、计算机和数据卡，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、平板电脑(Pad)、带无线收发功能的电脑等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile station，MS)、远程站(remote station)、接入点(access point，AP)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户站(subscriber station，SS)、用户端设备(customer premises equipment，CPE)、终端(terminal)、用户设备(user equipment，UE)、移动终端(mobile terminal，MT)等。终端设备也可以是可穿戴设备以及下一代通信系统，例如，5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的终端设备，NR通信系统中的终端设备等。
网络设备(例如宏基站)100是网络侧中一种用于发射或接收信号的实体，网络设备可以是用于与移动设备通信的设备。网络设备可以是无线局域网(wireless local area  networks，WLAN)中的AP，可以是长期演进(long term evolution，LTE)中的演进型基站(evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的网络设备，或NR系统中的新一代基站(generation Node B，gNodeB)等。
另外，在本申请实施例中，网络设备为小区提供服务，终端设备通过该小区使用的通信资源(例如，频域资源，或者说频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据发送服务。此外，在其它可能的情况下，网络设备可以是其它为终端设备提供无线通信功能的装置。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。为方便描述，本申请实施例中，为终端设备提供无线通信功能的装置称为网络设备。
图1B为本申请所适用的一种双连接(dual-connectivity，DC)场景下的网络架构示意图，该架构包括两个小区组：主小区组(master cell group，MCG)和辅小区组(secondary cell group，SCG)。其中MCG包括一个主小区(primary cell，PCell)或额外包括一个或多个辅小区(secondary cell，SCell)，SCG包括一个主辅小区(primary secondary cell，PSCell)或额外包括一个或多个SCell。管理MCG的网络设备称为主网络设备或主节点，管理SCG的网络设备称为辅网络设备或辅节点。
在5G网络的部署过程中，5G小区既可以作为宏覆盖组网(作为主网络设备)，也可以作为小站(作为辅网络设备)对现有的LTE网络进行覆盖和容量增强。无论采用哪种组网方式，双连接技术都可以用来实现LTE和5G系统的互连，从而提高整个移动网络系统的无线资源利用率，降低系统切换的时延，提高用户和系统性能。
本申请实施例中，主网络设备可以为LTE网络设备(如eNB)、5G网络设备(如gNB)或未来通信通信网络设备中的一个，辅网络设备也为LTE网络设备、5G网络设备或未来通信通信网络设备中的一个，并且主网络设备和辅网络设备可以是相同制式的网络设备，比如都是eNB，也可以是不同制式的网络设备，比如主网络设备是eNB，辅网络设备是gNB。本申请对于主网络设备和辅网络设备的通信制式不做限定。
应理解，图1A和图1B仅为便于理解而示例的简化示意图，该通信系统中还可以包括其他网络设备或者还可以包括其他终端设备，图1A和图1B中未予以画出。
下面对本申请中所使用到的一些通信名词或术语进行解释说明，该通信名词或术语也作为本申请发明内容的一部分。
一、载波聚合(carrier aggregation，CA)
载波聚合是将两个或更多的载波单元(component carrier，CC)聚合在一起以支持更大的传输带宽。
其中，一个下行载波单元对应一个独立的小区。通常可以将1个下行载波单元等同于1个小区。1个小区可以包含一个下行载波和一个上行载波，也可以只包含一个下行载波。在TDD的双工方式下，下行载波和上行载波在同一个载波上。为了高效地利用零碎的频谱，载波聚合支持不同载波单元之间的聚合。这里所述的不同载波单元，可以是相同 或不同带宽的载波单元，或者是同一频带内，邻接或非邻接的载波单元，还可以是不同频带内的载波单元。基于此，载波聚合可以分为同频带(intra-band)连续载波聚合、同频带非连续载波聚合、异频带非连续载波聚合。
主小区(primary cell，PCell)对应的载波单元称为主载波(primary component carrier，PCC)。其中，PCell的下行载波称为DL PCC，PCell的上行载波称为UL PCC。PCell可以是终端设备初始连接的小区，或者是进行RRC连接重建的小区，还可以是在小区切换(handover)过程中指定的主小区。PCell负责与终端设备之间的RRC通信。
SCell(secondary cell，辅小区)对应的载波单元称为辅载波(secondary component carrier，SCC)。其中，SCell的下行载波称为DL SCC，SCell的上行载波称为UL SCC。SCell是在RRC重配置时添加的，用于提供额外的无线资源。SCell可以在初始安全激活流程(initial security activation procedure)之后，在通过RRC连接重配置消息(RRC Connection Reconfiguration)中添加/修改/释放。SCell与终端设备之间不存在RRC通信。
服务小区(Serving cell)，是为终端设备提供服务(上下行传输)的小区。如果终端设备处于RRC连接(RRC_CONNECTED)态但并未配置CA，则该终端设备只有一个服务小区，即PCell；如果终端设备处于RRC_CONNECTED态且配置了CA，则该终端设备的serving cell包括PCell和所有的SCell。也就是说，serving cell既可以指代PCell，也可以指代SCell。PCell和SCell均为服务小区。
二、双连接(dual connectivity，DC)
双连接是指用于聚合的至少两个载波在不同的基站上。
其中，在主基站和辅基站上各至少有一个载波，分别为主小区和主辅小区。主基站和辅基站上还可以有其他的辅载波。终端设备可以通过主基站和辅基站和网络进行通信。
三、主小区(primary cell，PCell)
主小区可以是终端设备进行初始连接建立的小区，或者，主小区可以是终端设备进行无线资源控制(radio resource control，RRC)连接重建的小区，或者，主小区可以是在切换(handover)过程中指定的主小区等。主小区，主要用于与终端设备之间的RRC通信。主小区对应的载波单元称为主载波单元(primary component carrier，PCC)，主载波单元的下行载波称为下行主载波单元(down link PCC，DL PCC)，主载波单元的上行载波称为上行主载波单元(up link PCC，UL PCC)。所述主载波单元还可称为主载波。在本申请实施例中，以主载波为例进行说明。
四、辅小区(secondary cell，SCell)
辅小区，主要用于提供额外的无线资源。例如，辅小区与UE之间不存在RRC通信。所述辅小区可以是在RRC重配置时添加的。辅小区对应的载波单元成为辅载波单元(secondary component carrier，SCC)。辅载波单元的下行载波称为下行辅载波单元(down link SCC,DL SCC)，辅载波单元的上行载波称为上行辅载波单元(uplink SCC，UL SCC)。所述辅载波单元还可称为辅载波。在本申请实施例中，以辅载波为例进行说明。
示例的，主小区可以是在连接建立时确定的，辅小区可以是在初始接入完成之后，通过RRC连接重配置消息添加、修改或释放的。
五、辅小区的激活和去激活
终端设备的主小区不支持激活或去激活，终端设备的主小区总是处于激活态。除了PCell外，配置的SCell并不是配置后就可以使用。为了更好地管理被配置了CA的终端设 备的电池消耗，通信系统提供了SCell的激活/去激活机制。激活SCell需要进行CSI测量，以及上报有效的CSI报告。
示例的，如果一辅小区被激活，则终端设备可在该激活的辅小区对应的载波单元内进行以下操作中的一个或多个：
发送探测参考信号(sounding reference signal，SRS)；上报信道状态信息(channel state information，CSI)；检测该辅小区以及在该辅小区上传输的物理下行控制信道(physical downlink control channel，PDCCH)；若配置了在该载波上传输物理上行控制信道(physical uplink control channel，PUCCH)，则需要发送PUCCH；启动或重启辅小区去激活定时器(Scell deactivationtimer)；触发功率余量报告(power headroom report，PHR)上报等。
如果一辅小区被去激活，则终端设备可以在该去激活的辅小区对应的载波单元内至少不进行以下操作：
不发送SRS；不上报CSI；不传输上行数据，可包括上行同步信道(uplink synchronization channel，UL-SCH)和随机接入信道(random access channel，RACH)等；不检测该辅小区以及该辅小区上传输的PDCCH；不发送PUCCH等。
由于BWP是小区里的配置，当辅小区激活前，所有该辅小区配置的BWP都处于未激活状态。上述激活小区的操作都是在BWP激活后来进行的。一个辅小区激活时，至少有一个BWP也同时激活。
六、带宽部分(bandwidth part，BWP)
BWP，是载波上一组连续或非连续的物理资源，物理资源可以是物理资源块(resource block，RB)，或物理资源块组(resource block group，RBG)，或物理资源元素(resource element，RE)等。网络设备可以为终端设备在一个小区上配置一个或多个BWP。在任一时刻，终端设备可激活一个或多个BWP，终端设备和网络设备在激活的BWP上进行数据的收发。BWP可以包括初始激活BWP(initial active BWP)和UE专用的BWP。在辅载波上，还可以包括第一激活BWP(first active BWP)。
其中，初始激活BWP可指终端设备在接收专用BWP配置信息前，用于数据接收或发送的BWP，可通过广播消息进行配置，所述广播消息可包括主信息块(master information block，MIB)和系统消息块(system information block，SIB)等。或者，初始激活BWP可指用于初始接入的BWP等。初始激活BWP可以包括初始激活下行BWP(initial downlink BWP)和初始激活上行BWP(initial uplink BWP)等。
UE专用的BWP是指终端设备在初始接入完成和接收专用BWP配置信息之后，用于数据接收或发送的BWP，比如所述专用BWP配置信息可为RRC等。对于一个终端，在一个服务小区上例如可以配置4个BWP，所述4个BWP中可不包括通过广播消息配置的初始激活BWP。在任一时刻，可激活一个或多个BWP，激活的BWP可称为激活BWP。
示例的，网络设备可向终端设备发送下行控制信息(down control information，DCI)，该DCI可用于指示BWP的激活，所述激活的BWP可为上述UE专用BWP。网络设备和终端设备可在上述激活的BWP上进行通信，用于传输高可靠低时延通信(ultra reliable and low latency communications，URLLC)业务、增强移动带宽(enhanced mobile broadband，eMBB)业务、车联网(vehicle to everything，V2X)业务以及机器型通信(machine-type communication，MTC)定位等，或者所述BWP可为业务特定的BWP，比如只用于V2X业务的旁链路BWP等。
七、媒体接入控制层控制单元(media access control control element，MAC CE)
MAC CE信令是网络设备和终端设备通过MAC层进行交互的控制信息。现有辅小区的激活和去激活命令是网络设备给终端设备发送激活/去激活MAC CE来进行指示的。对于一个已经配置但未激活的SCell，终端设备可以根据该MAC CE中的信息激活该SCell。进一步地，对于一个已经激活的SCell而言，网络设备可以通过该MAC CE去激活一个或多个已经激活的SCell。此外，终端设备还可以根据SCell的去激活定时器的机制去激活一个SCell。
八、下行控制信息(down control information，DCI)
DCI是网络设备发送给终端设备的信息，比如，网络设备可通过物理下行控制信道PDCCH发送DCI。DCI可用于调度上行数据传输，或者，调度下行数据传输等。比如，网络设备与终端设备间的通信接口为空中接口(Uu接口)，可在Uu接口上进行上行/下行数据传输，所述上行数据传输指从终端设备到网络设备间的数据传输，所述下行数据传输指从网络设备到终端设备间的数据传输。
九、CSI-RS资源和CSI报告资源
CSI-RS资源有三种类型，分别是周期CSI-RS资源、半持续CSI-RS资源(semi persistent CSI-RS，SP CSI-RS)和非周期CSI-RS资源；CSI报告资源也有三种类型，分别是周期CSI报告资源、半持续CSI报告(semi persistent CSI report，SP CSI report)资源和非周期CSI报告资源。
其中，半持续CSI-RS资源和半持续CSI报告资源的激活状态或去激活状态可以通过MAC CE信令进行指示，而周期CSI-RS资源只能通过RRC信令进行修改。所谓激活是指配置的信息生效；所谓去激活是指相关的配置信息失效。例如半持续CSI-RS资源首先会配置发送周期，但在通过MAC CE激活该半持续CSI-RS资源前，该半持续CSI-RS资源处于去激活状态(也可以称为未激活状态)，并不实际进行CSI-RS的发送。当通过MAC CE激活该半持续CSI-RS资源后，网络侧才会按照所配置的发送周期进行CSI-RS的发送。相应的，当处于激活状态的半持续CSI-RS资源，当网络侧通过MAC CE去激活该半持续CSI-RS资源后，网络侧会停止CSI-RS的发送。
可以理解的是，由于一个小区只包含一个下行载波，而下行载波是一个小区不可缺少的载波，因此本申请实施例中的“小区”和“载波”可以等价使用。如无特别说明，在本申请实施例中，以“小区”为例进行说明。另外，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
如图2所示，本申请提供一种通信方法的流程，该流程用于激活辅小区，该流程中的网络设备可为上述图1A中的网络设备100，终端设备可为上述图1A中的终端设备120。可以理解的是，网络设备的功能也可以通过应用于网络设备的芯片来实现，或者通过其他装置来支持网络设备实现；终端设备的功能也可以通过应用于终端设备的芯片来实现，或者通过其他装置来支持终端设备实现。该流程具体可为：
步骤201，网络设备向终端设备发送第一信息，第一信息用于激活第一辅小区。
其中，第一信息可以承载于控制信息中，控制信息例如是MAC CE信令或DCI。MAC CE信令或DCI中包括第一指示信息，第一指示信息用于指示激活第一辅小区。
步骤202，终端设备接收第一信息，并在第一辅小区的激活过程中，使用第一半持续 CSI-RS资源进行CSI测量。
可选地，还可以包括步骤203，终端设备向网络设备发送CSI报告。
示例性地，控制信息中可以包括一个或者多个小区的激活命令，控制信息也可以包括一个或者多个小区的去激活命令，或者说，控制信息中可以既包括一个或者多个小区激活命令，也包括一个或者多个小区去激活命令。本申请实施例下文中以一个辅小区(即第一辅小区)的激活为例，在控制信息还包括其它辅小区的激活命令或者去激活命令的情况下，其它辅小区的激活过程或者去激活过程与第一辅小区的激活或者去激活过程类似，不再重复说明。
示例性地，当上述方法应用于图1B所示的DC场景下的通信系统中时，由于主网络设备上的PCell用于终端设备侧和网络设备侧的RRC控制信令的交互，因此主网络设备可以获取所有的小区配置信息，例如辅网络设备上辅小区的配置信息。因此当辅网络设备需要这些辅小区的配置信息时，可以请求从向主网络设备获取，或者主网络设备主动将这些配置信息发送给辅网络设备。辅小区的配置信息包括：半持续CSI-RS资源的信息，还包括半持续CSI报告资源的信息等。
基于上述方案，在BWP没有激活时，终端设备可以通过半持续CSI-RS资源来完成辅小区的激活，提高了半持续CSI-RS资源的利用率，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令或DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活。
下面对图2所示实施例的各种情形进行说明。
情形1，第一信息除了包括第一指示信息，还可以包括第二指示信息，第二指示信息用于指示激活第一半持续CSI-RS资源。
该情形1进一步包括以下情形1.1至情形1.2。
情形1.1，第一指示信息可以承载于一个MAC CE信令或DCI中，第二指示信息可以承载于另一个MAC CE信令或DCI中。
情形1.2，第一指示信息和第二指示信息可以承载于同一个第一控制信息中，该第一控制信息可以是MAC CE信令或DCI。
该情形1下，上述步骤202具体为：终端设备确定与第一指示信息对应的第一辅小区，以及确定与第二指示信息对应的第一半持续CSI-RS资源，因此终端设备对第一辅小区进行激活，在激活过程中，使用第一半持续CSI-RS资源进行CSI测量。
该情形1下，上述步骤203具体为：终端设备在主小区上或者在已经激活的辅小区上使用现有配置的CSI报告资源发送CSI报告。
在一种可能的示例中，第二指示信息所指示激活的第一半持续CSI-RS资源的周期小于其它已激活的半持续CSI-RS资源或周期CSI-RS资源。当终端设备在激活过程中使用配置周期较小的半持续CSI-RS资源，可以加快辅小区激活，简化半持续CSI-RS资源的使用，提高半持续CSI-RS资源的利用率，降低辅小区激活时延。
情形2，第一信息除了包括第一指示信息、第二指示信息，还包括第三指示信息。第三指示用于指示激活第一半持续CSI报告资源。
该情形2进一步包括以下情形2.1至情形2.3。
情形2.1，第一指示信息可以承载于第一MAC CE信令或第一DCI中，第二指示信息可以承载于第二MAC CE信令或第二DCI中，第三指示信息可以承载于第三MAC CE信 令或第三DCI中。
情形2.2，第一指示信息、第二指示信息和第三指示信息中的任意两个指示信息承载于一个MAC CE信令或DCI中，剩下的一个指示信息可以承载于另一个MAC CE信令或DCI中。
情形2.3，第一指示信息、第二指示信息和第三指示信息可以均承载于第一控制信息中，第一控制信息可以是MAC CE信令或DCI。
该情形2下，上述步骤202具体为：终端设备确定与第一指示信息对应的第一辅小区，以及确定与第二指示信息对应的第一半持续CSI-RS资源，因此终端设备对第一辅小区进行激活，在激活过程中，使用第一半持续CSI-RS资源进行CSI测量。
该情形2下，上述步骤203具体为：终端设备确定与第三指示信息对应的第一CSI报告资源，然后终端设备在主小区上或者在已经激活的辅小区上使用第一CSI报告资源发送CSI报告。
在一种可能的示例中，第三指示信息所指示激活的第一CSI报告资源的周期小于其它已激活的半持续CSI报告资源的周期或周期CSI报告资源的周期，当终端设备在激活过程中使用配置周期较小的半持续CSI报告资源，可以加快辅小区激活，减小第一辅小区的激活过程所需的时延。
情形3，第一信息仅包括第一指示信息。第一指示信息可以承载于DCI中。
该情形3进一步包括以下情形3.1至情形3.2。
情形3.1，上述步骤202具体为：终端设备在收到该DCI后，确定与第一指示信息对应的第一辅小区，另外，终端设备确定默认索引对应的第一半持续CSI-RS资源。因此终端设备对第一辅小区进行激活，在激活过程中，使用第一半持续CSI-RS资源进行CSI测量。
上述步骤203具体为：终端设备在主小区上或者在已经激活的辅小区上使用现有配置的CSI报告资源发送CSI报告。
情形3.2，上述步骤202具体为：终端设备在收到该DCI后，确定与第一指示信息对应的第一辅小区，另外，终端设备确定默认索引对应的第一半持续CSI-RS资源和第一半持续CSI报告资源，因此终端设备对第一辅小区进行激活，在激活过程中，使用第一半持续CSI-RS资源进行CSI测量。
上述步骤203具体为：终端设备在主小区上或者在已经激活的辅小区上使用第一半持续CSI报告资源发送CSI报告。
针对图2所示的通信方法，作为示例，下面给出四种不同的具体实现方法，其中，以下实现方法一是上述情形1.2的具体实现过程，以下实现方法二是上述情形2.3的具体实现过程，以下实现方法三和实现方法四是上述情形3.2的具体实现过程。本发明以下实施例以支持最大16个小区聚合为示例，具体支持的小区个数可以根据需要进行调整，并不对本发明造成限定。需要说明的是，实际应用中，并不限于以下四种实现方法。
实现方法一
示例性地，如图3所示，SCell 1为待激活的第一辅小区，第一半持续CSI-RS资源为DL SCC上的资源，终端设备接收到SCell 1的激活命令后，终端设备使用SCell 1的DL SCC上的第一半持续CSI-RS资源测量CSI，然后终端设备通过PCell的UL CC上的CSI报告资源发送CSI报告。
在一种可能的示例中，上述步骤201中，网络设备向终端设备发送的第一信息承载于MAC CE信令中，该MAC CE信令包括第一指示信息和第二指示信息。
其中，MAC CE结构如图4所示。图4中的MAC CE中的信息域有：辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域、保留域。
各个信息域的含义如下：
(1)、Ci指代辅小区指示域，用于指示索引号字段(SCell Index)被配置为i的SCell的激活/去激活状态。如果Ci设置为1，表示对应的SCell被激活；如果Ci设置为0，表示对应的SCell被去激活。图4中Oct表示因特网标准使用8位组(octet)，即1octet＝8bit。如果没有对应索引号字段的辅小区被配置，则忽略该字段的内容。
(2)、半持续CSI-RS资源组ID i(即SP CSI-RS resource set ID i)指代半持续CSI-RS资源组域，该字段包含由一个或多个半持续CSI-RS资源组成的CSI-RS资源组(也可称为CSI-RS资源集)的索引。这里的CSI-RS资源可以是非零功率信道状态信息参考信号资源(Non-Zero Power Channel State Information-Reference Signal resource,NZP CSI-RS resource)，因此半持续CSI-RS资源组ID可以是NZP CSI-RS资源的NZP-CSI-RS-ResourceSet的索引(ID)，用于指示特定小区上具有ResourceSet的索引对应的资源组(或资源集合)应激活或去激活。该信息域的字段长度为6位(现有支持一个小区最大配置64个CSI-RS资源组)；当Ci设置为1表示Ci对应小区上对应的SP CSI-RS resource set ID i的半持续CSI-RS资源组被激活，否则表示对应SP CSI-RS resource set IDi的半持续CSI-RS资源组被去激活。可选地，当Ci设置为0时还可以表示，该对应的小区上所有的半持续CSI-RS资源组都被去激活。
(3)、Resourceset ID i TCI状态ID(即Resource set IDi TCI State ID)指代资源组TCI状态域，指代半持续CSI-RS资源组内CSI-RS资源的TCI状态，该字段包含半持续CSI-RS资源组的TCI状态的索引TCI-StateId，其被用作半持续CSI-RS资源组(集)ID i所指示的半持续NZP CSI-RS资源组(集)内的资源的准共址(Quasi-colocation，QCL)源。TCI State ID0表示SP CSI-RS资源组中第一个资源的TCI状态。由于一个半持续CSI-RS资源组(也可称为一个半持续CSI-RS资源集)中至少包括一个半持续CSI-RS资源，所以TCI ID0是一定存在的。当一个半持续CSI-RS资源组包括更多的半持续CSI-RS资源时，MAC CE信令还可以包括第二个资源的TCI State ID1，依此类推。该字段每个TCI State ID的长度是7位(TCI state支持最多128种)。如果Ci字段设置为0，则可以不存在包含TCI State ID0字段的八位字节。
(4)、R(reversed)指代保留域，表示保留的比特，设置为0。
CSI-RS资源是针对特定小区上特定BWP进行配置的，即在特定小区上CSI-RS资源会关联到一个BWP。MAC CE或DCI指示的CSI-RS资源也会关联到一个特定的下行BWP。为明确CSI-RS资源所关联的BWP信息，可以在指示信息中包含BWP索引(BWP ID)信息(未在图中示出)。为了简化小区激活过程中的指示信息，可以对BWP的指示信息进行简化，即使用CSI-RS与默认BWP的关联方式进行指示。所述CSI-RS关联的默认BWP是默认的下行BWP，其可以是RRC配置中对应firstActive DL BWP ID的BWP。也可以是默认的配置的下行BWP ID中最小或最大BWP ID对应的BWP。本示例可以理解为，指示信息中的CSI-RS资源是与默认BWP相关联的CSI-RS资源。
基于该MAC CE结构，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组 域用于承载第二指示信息。
基于该实现方法，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息和第二指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源，因半持续CSI-RS资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率，同时也提高了半持续CSI-RS资源的利用率。
实现方法二
示例性地，如图3所示，SCell 1为待激活的第一辅小区，第一半持续CSI-RS资源为DL SCC上的资源，第一半持续CSI报告资源为UL PCC上的资源，终端设备接收到SCell1的激活命令后，终端设备使用SCell 1的DL SCC上的第一半持续CSI-RS资源测量CSI，然后终端设备通过PCell的UL PCC上的第一半持续CSI报告资源发送CSI报告。
在一种可能的示例中，上述步骤201中，网络设备向终端设备发送的第一信息承载于MAC CE信令中，该MAC CE信令包括第一指示信息、第二指示信息和第三指示信息。
其中，MAC CE结构如图5A所示。图5A中的MAC CE中的信息域除了包括图4中的辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域、保留域，还包括半持续CSI报告配置域。图5A中的辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域和保留域可以参照图4的描述，此处不再赘述。
其中，Serving Cell ID指示具有ServingCellIndex的PCell或SCell，该小区是已经激活的可以用于发送CSI报告的小区标识。示例性的，该Serving Cell ID也可以不包含，默认通过当前上行PUCCH所在的小区进行CSI报告的发送。
Sj指代上述Serving Cell ID指示的小区上半持续CSI报告配置域，该字段指示具有ServingCellIndex为Serving Cell ID指示的PCell或SCell的CSI-ReportConfigToAddModList(CSI报告配置至增加模式列表)中半持续CSI报告配置的激活/去激活状态。S0指的是用于指示特定BWP中的SP CSI报告的PUCCH资源，并且具有设置为semiPersistentOnPUCCH(半持续至PUCCH)的类型的列表中的最低CSI-ReportConfigId(CSI-报告配置ID)的报告配置，S1指的是用于指示该特定BWP中的SP CSI报告的PUCCH资源，并具有第二低的CSI-ReportConfigId的报告配置。如果列表中具有在特定BWP中设置为semiPersistentOnPUCCH的类型的报告配置的数量小于j+1，则MAC实体将忽略Sj字段。Sj字段设置为1，用于指示相应的半持续CSI报告配置将被激活。Sj字段设置为0，用以指示相应的半持续CSI报告配置j将被去激活。
CSI-RS资源是针对特定小区上特定BWP进行配置的，即在特定小区上CSI-RS资源会关联到一个BWP。MAC CE或DCI指示的CSI-RS资源也会关联到一个特定的下行BWP。为明确CSI-RS资源所关联的BWP信息，可以在指示信息中包含BWP索引(BWP ID)信息(未在图中示出)。为了简化小区激活过程中的指示信息，可以对BWP的指示信息进行简化，即使用CSI-RS与默认BWP的关联方式进行指示。所述CSI-RS关联的默认BWP是默认的下行BWP，其可以是RRC配置中对应firstActive DL BWP ID的BWP。也可以是默认的配置的下行BWP ID中最小或最大BWP ID对应的BWP。本示例可以理解为，指示信息中的CSI-RS资源是与默认BWP相关联的CSI-RS资源。CSI报告资源是针对特定小区上特定BWP进行配置的，即在特定小区上CSI报告资源会关联到一个BWP。MAC CE 或DCI指示的CSI报告资源也会关联到一个特定的上行BWP。为明确CSI报告资源所关联的BWP信息，可以在指示信息中包含BWP索引(BWP ID)信息。为了简化小区激活过程中的指示信息，可以对BWP的指示信息进行简化，即使用CSI报告资源与默认BWP的关联方式进行指示。所述CSI报告资源关联的默认BWP是默认的上行BWP，所述特定的上行BWP可以是MAC CE中BWP ID指示的上行BWP，也可以是RRC配置中对应firstActive UL BWP ID对应的BWP。也可以是为Serving Cell ID所指示的小区上配置的最小或最大BWP ID所对应的BWP。还可以是Serving Cell ID所指示的小区(包括默认的当前上行PUCCH所在的小区)上当前激活的上行BWP。
基于该MAC CE结构，辅小区指示域用于承载第一指示信息，半持续CSI-RS资源组域用于承载第二指示信息，半持续CSI报告配置域用于承载第三指示信息。
基于该实现方法，一方面，网络设备可以在一条MAC CE信令中联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源和半持续CSI报告资源在小区激活过程中的使用流程，从而降低SCell的激活时延。另一方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过MAC CE信令设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。
实现方法三
在一种可能的示例中，上述步骤201中，网络设备向终端设备发送的第一信息承载于DCI中，DCI中可以包括第一指示信息，或者DCI中可以包括第一指示信息和第二指示信息，或者DCI中包括第一指示信息、第二指示信息和第三指示信息。
示例1，网络设备可以使用新设计DCI format(格式)来承载第一信息，如DCI fomat3_x。
示例2，网络设备可以复用现有DCI format(格式)来承载第一信息，如DCI fomat 1_0。
针对示例1和示例2，第一种具体实现方法：网络设备可以使用新的RNTI加扰的DCI format编码的CRC用来传输该第一信息，简述为新RNTI加扰DCI。例如网络设备可以通过现有的DCI format 1_0中采用辅小区激活RNTI(SCAct-RNTI)加扰的DCI中包含该第一信息。此外，网络设备还可以通过复用现有的DCI format 1_1，DCI format 0_1，或DCI format 0_0来承载第一信息。
在一种可能的实施例中，也可以不引入新的SCAct-RNTI进行该DCI信息的加扰，而是使用现有RNTI，如C-RNTI来加扰该DCI信息。
第二种具体实现方法：网络设备可以DCI结构中的信息域来指示DCI中包含该第一信息。
示例性地，DCI信息的验证域可以使用HARQ process number(HARQ进程编号)或冗余版本(Redundancy version，RV)、调制与编码策略(MCS)、时间域资源分配(time domain resource assignment，TDRA)、新数据指示器(new data indicator，NDI)、发送功率(Transmit Power Control)指示域(可以是PUSCH的TPC或PUCCH的TPC)、跳频(Frequency Hopping Flag)指示域和FDRA中的一个或多个信息域的特殊取值(全‘0’或全‘1’)进行组合。另外，还可以不使用包括FDRA域的其他域的组合进行DCI信息的验证。
第三种具体实现方法：网络设备可以结合使用第一种具体实现方法和第二种具体实现方法。
一方面，针对第一种具体实现方法，网络设备可以使用新的RNTI加扰的DCI编码过程如下(其本质是DCI中的信息以某种格式进行编码时的CRC使用RNTI加扰)：
1)控制信息按照一定的格式(DCI format)组成控制信息块，或称为控制信息序列，如a 0,a 1,a 2,a 3,...,a A-1。
2)根据控制信息块a 0,a 1,a 2,a 3,...,a A-1生成CRC校验信息p 0,p 1,p 2,p 3,...,p L-1，在控制信息块上附加上CRC校验信息生成信息b 0,b 1,b 2,b 3,...,b K-1，其中：
b k＝a k for k＝0,1,2,...,A-1
b k＝p k-A for k＝A,A+1,A+2,...,A+L-1,
K＝A+L。
3)附加后，CRC校验信息用相应的RNTI(16bit)x rnti,0,x rnti,1,...,x rnti,15进行加扰生成信息序列c 0,c 1,c 2,c 3,...,c K-1，具体的就是进行如下运算：
c k＝b k for k＝0,1,2,…,A+7
c k＝(b k+x rnti,k-A-8)mod 2 for k＝A+8,A+9,A+10,...,A+23。
4)接着进行信道编码和速率匹配，完成控制信息的编码过程。
另一方面，针对第二种具体实现方法，DCI结构如表2所示。表2中的辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域和半持续CSI报告配置域可以参照图4和图5A的具体描述，此处不再赘述。
该DCI结构如表1所示。表1中的DCI的信息域有：辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域、半持续CSI报告配置域。表1中的辅小区指示域、半持续CSI-RS资源组域、资源组的TCI状态域和半持续CSI报告配置域可以参照图4和图5A的具体描述，此处不再赘述。
表1
Figure PCTCN2019101136-appb-000001
Figure PCTCN2019101136-appb-000002
表1中，示例性地，当FDRA非全1时用于指示频率资源，当FDRA为全‘1’用于指示该下行控制信息为第一控制信息。
在一种可能的实施例中，考虑到DCI format中的信息比特受限，因此本申请实施例可以如下方式对承载第一信息的DCI中的内容进行简化。
方式1，可以减少DCI overload(负载)各种ID指示的数量。
例如，现有DCI中需要占用6个比特来承载64个半持续CSI-RS资源组ID中任意一个ID所指示的CSI-RS资源，本实施方式中，DCI中可以仅占用1个比特来承载loweset1～2个ID(最低的1至2个ID)对应的半持续CSI-RS资源组。也就是说，DCI中只包括小区指示域所指示的辅小区特定下行BWP上最小CSI-RS资源组ID对应的半持续CSI-RS资源组和所指示的辅小区特定下行BWP上次小CSI-RS资源组ID对应的半持续CSI-RS资源组。同理也可以对各个CSI-RS资源组对应的TCI状态ID进行简化。
再比如，现有DCI中需要占用4个比特来承载4个CSI报告资源ID对应的CSI报告资源，本实施方式中，DCI中仅占用1个比特来承载loweset1～2个CSI报告资源ID(最低的1至2个ID)对应的CSI报告资源。也就是说，DCI中只包括小区指示域所指示的辅小区特定下行BWP上最小CSI报告资源ID对应的半持续CSI报告资源和所指示的辅小区特定下行BWP上次小CSI报告资源ID对应的CSI报告资源。
方式2，可以采用默认ID对应的信息。例如，现有DCI中需要占用6个比特来承载64个半持续CSI-RS资源组ID中任意一个ID所指示的CSI-RS资源，本实施方式中，DCI中不承载半持续CSI-RS资源组域、资源组的TCI状态域和半持续CSI报告配置域对应的信息，也就是说这些信息域占用0个比特。因此，DCI中可以仅包括指示DCI格式的信息、频率资源指示信息和第一指示信息。
示例性的，如图5B所示，该图表示了CSI-RS资源组、CSI_RS资源和CSI-RS资源组对应的TCI状态的关系图。当默认使用最低CSI-RS资源ID对应的CSI-RS资源组，且每个CSI-RS资源都使用最低TCI state ID对应的TCI状态时，DCI中不需要包含CSI-RS资源 组ID和对应的TCI state ID。终端设备可以根据默认关系，确定使用CSI-RS资源组1中CSI-RS资源1和相应资源的TCI state 0，使用CSI-RS资源组1中CSI-RS资源2和相应资源的TCI state 0，以及使用CSI-RS资源组1中CSI-RS资源3和相应资源的TCI state 0来进行CSI的测量。如图5C所示，该图表示了多个CSI报告资源。当默认使用最低CSI报告资源ID对应的CSI报告资源时，终端设备可以根据默认关系确定使用CSI报告资源1进行相应的CSI报告。
示例性地，该方式2下，上述步骤202具体为：终端设备收到该DCI后，在指定的小区上，默认只使用小区指示域所指示的辅小区特定下行BWP上RRC配置的最小的BWP ID对应的半持续CSI-RS资源，或者默认只使用RRC配置的最小的BWP ID和次小的BWP ID对应的半持续CSI-RS资源。上述步骤203具体为：终端设备收到该DCI后，默认只使用RRC配置的最小的BWP ID对应的半持续CSI报告资源，或者默认只使用RRC配置的最小的BWP ID和次小的BWP ID对应的半持续CSI报告资源。
在一种可能的实施例中，为了不增加终端设备的PDCCH盲检次数，新设计的DCI format的比特总数或者复用的DCI format的比特总数需要与原用于数据调度的DCI format的比特总数相同。即当使用DCI format 3_x发送该第一信息时，其DCI format 3_x的大小要与用于下行数据调度的DCI format 1_0或DCI format 1_1的大小一致。
基于实现方法三，第一方面，网络设备可以在一条DCI中联合第一指示信息、第二指示信息和第三指示信息，因此可以简化半持续CSI-RS资源在辅小区激活过程中的使用流程，从而降低SCell的激活时延。第二方面，该方法可支持在SCell激活过程中使用半持续CSI-RS资源和半持续CSI报告资源，因半持续CSI-RS资源和半持续CSI报告资源的激活状态和去激活状态可以通过DCI设置，所以该方法可以实现灵活地对辅小区进行激活和去激活，从而提高空口资源的利用率。第三方面，因DCI的传输时延小于MAC CE信令的传输时延，所以与实现方法一和实现方法二相比，该实现方法可以更有效地减小辅小区的激活时延。
在另一种可能的实施例中，基于实现方法三和实现方法四，当第一信息承载于DCI中时，终端设备还可以对该第一信息进行混合自动重传请求(hybrid automatic repeat reQuest，HARQ)反馈，即终端设备向网络设备发送HARQ，HARQ用于指示第一信息是否被正确接收，以提高DCI信息发送的可靠性。
如图6所示，本申请还提供一种通信方法的流程，该流程用于去激活辅小区，该流程中的网络设备可对应于上述图1A所示流程中的网络设备110，终端设备可对应于上述图1A所示流程中的终端设备120，该流程包括：
S601，网络设备向终端设备发送第二信息，第二信息用于去激活第一辅小区。
其中，第二信息可以承载于控制信息中，控制信息例如是MAC CE信令或DCI。MAC CE信令或DCI中包括指示去激活第一辅小区的指示信息。
步骤602，终端设备停止使用第一半持续CSI-RS资源进行CSI测量。
示例性地，终端设备还可以对第一辅小区执行如下第一操作，第一操作可以包括如下至少一项：
不监测第一辅小区上的PDCCH；
不监测调度第一辅小区的PDCCH；
不在第一辅小区上传输SRS；
不在第一辅小区上传输上行数据；
不在第一辅小区上传输上行控制信道PUCCH；
停止第一辅小区的去激活定时器；
清除第一辅小区对应的HARQ缓存。
通过上述方案，终端设备根据网络设备发送的第二信息，对第一辅小区去激活，进而实现灵活控制辅小区的激活状态或者去激活状态。
示例性地，控制信息还包括其它辅小区去激活命令，其它辅小区的去激活过程与第一辅小区的激活或者去激活过程类似，不再重复说明。
上述主要从各个网元之间交互的角度对本申请提供的方案进行了介绍。可以理解的是，上述实现各网元为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本发明能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
可以理解的是，图2和图6的描述可以独立应用，相互结合或参考。
以上结合图2和图6详细说明了本申请实施例的通信方法。以下结合图7至图9详细说明本申请实施例的通信装置。
图7是本申请实施例提供的一种终端设备的结构示意图。该终端设备可适用于图1A所示出的系统中，执行上述方法实施例中终端设备的功能。为了便于说明，图7仅示出了终端设备的主要部件。如图7所示，终端设备120包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行上述方法实施例中所描述的动作，如，基于接收的PMI和RI确定预编码矩阵进而对信号进行预编码并发送预编码后的信号等。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述指示信息与组合信息的对应关系等。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图7仅示出了一个存储器和一个处理器。在实际的终端设备中，可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限定。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主 要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图7中的处理器可以集成基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在本申请实施例中，可以将具有收发功能的天线和控制电路视为终端设备120的收发单元701，例如，用于支持终端设备执行如图2部分所述的接收功能和发送功能。将具有处理功能的处理器视为终端设备120的处理单元702。如图7所示，终端设备120包括收发单元701和处理单元702。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元701中用于实现接收功能的器件视为接收单元，将收发单元701中用于实现发送功能的器件视为发送单元，即收发单元701包括接收单元和发送单元，接收单元也可以称为接收机、输入口、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
处理单元702可用于执行该存储器存储的指令，以控制收发单元701接收信号和/或发送信号，完成上述方法实施例中终端设备的功能。作为一种实现方式，收发单元701的功能可以考虑通过收发电路或者收发的专用芯片实现。
图8是本申请实施例提供的一种网络设备的结构示意图，如可以为基站的结构示意图。如图8所示，该基站可应用于如图1A所示的系统中，执行上述方法实施例中网络设备的功能。基站800可包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)801和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)802。所述RRU 801可以称为收发单元、收发机、收发电路、或者收发器等等，其可以包括至少一个天线8011和射频单元8012。所述RRU 801部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送上述实施例中所述的信令消息。所述BBU802部分主要用于进行基带处理，对基站进行控制等。所述RRU 801与BBU 802可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 802为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)802可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个实例中，所述BBU 802可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述BBU 802还包括存储器8021和处理器8022，所述存储器8021用于存储必要的指令和数据。例如存储器8021存储上述实施例中的码本索引与预编码矩阵的对应关系。所述处理器8022用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器8021和处理器8022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
图9给出了一种通信装置900的结构示意图。装置900可用于实现上述方法实施例中描述的方法，可以参见上述方法实施例中的说明。所述通信装置900可以是芯片，网络设备(如基站)，终端设备或者其他网络设备等。
所述通信装置900包括一个或多个处理器901。所述处理器901可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、终端、或芯片等)进行控制，执行软件程序，处理软件程序的数据。所述通信装置可以包括收发单元，用以实现信号的输入(接收)和输出(发送)。例如，通信装置可以为芯片，所述收发单元可以是芯片的输入和/或输出电路，或者通信接口。所述芯片可以用于终端或基站或其他网络设备。又如，通信装置可以为终端或基站或其他网络设备，所述收发单元可以为收发器，射频芯片等。
所述通信装置900包括一个或多个所述处理器901，所述一个或多个处理器901可实现图2所示的实施例中网络设备或者终端设备的方法。
在一种可能的设计中，所述通信装置900包括用于生成第一指示信息的部件(means)，以及用于发送第一指示信息的部件(means)。可以通过一个或多个处理器来实现所述生成第一指示信息的means以及发送第一指示信息的means的功能。例如可以通过一个或多个处理器生成所述第一指示信息，通过收发器、或输入/输出电路、或芯片的接口发送所述第一指示信息。所述第一指示信息可以参见上述方法实施例中的相关描述。
在一种可能的设计中，所述通信装置900包括用于接收第一指示信息的部件(means)，以及用于确定第二参数的部件(means)。所述第一指示信息以及如何确定第二参数可以参见上述方法实施例中的相关描述。例如可以通过收发器、或输入/输出电路、或芯片的接口接收所述第一指示信息，通过一个或多个处理器确定第二参数。
可选的，处理器901除了实现图2所示的实施例的方法，还可以实现其他功能。
可选的，一种设计中，处理器901也可以包括指令903，所述指令可以在所述处理器上被运行，使得所述通信装置900执行上述方法实施例中描述的方法。
在又一种可能的设计中，通信装置900也可以包括电路，所述电路可以实现前述方法实施例中网络设备或终端设备的功能。
在又一种可能的设计中所述通信装置900中可以包括一个或多个存储器902，其上存有指令904，所述指令可在所述处理器上被运行，使得所述通信装置900执行上述方法实施例中描述的方法。可选的，所述存储器中还可以存储有数据。可选的处理器中也可以存储指令和/或数据。例如，所述一个或多个存储器902可以存储上述实施例中所描述的对应关系，或者上述实施例中所涉及的相关的参数或表格等。所述处理器和存储器可以单独设置，也可以集成在一起。
在又一种可能的设计中，所述通信装置900还可以包括收发单元905以及天线906。所述处理器901可以称为处理单元，对通信装置(终端或者基站)进行控制。所述收发单元905可以称为收发机、收发电路、或者收发器等，用于通过天线906实现通信装置的收发功能。
本申请还提供一种通信系统，其包括前述的一个或多个网络设备，和，一个或多个终端设备。
应理解，在本申请实施例中的处理器可以是中央处理单元(Central Processing Unit， CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件(如电路)、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的 划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (29)

  1. 一种通信方法，其特征在于，包括：
    终端设备接收第一信息，所述第一信息用于激活第一辅小区；
    所述终端设备在所述第一辅小区的激活过程中，使用第一半持续信道状态信息参考信号CSI-RS资源进行信道状态信息CSI测量。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示激活所述第一辅小区；所述第二指示信息用于指示激活所述第一半持续CSI-RS资源。
  3. 根据权利要求2所述的方法，其特征在于，所述第一信息还包括第三指示信息，所述第三指示信息用于指示激活第一半持续CSI报告资源；
    所述方法还包括：
    所述终端设备在主小区上或者在已经激活的辅小区上使用所述第一半持续CSI报告资源发送CSI报告。
  4. 根据权利要求3所述的方法，其特征在于，所述第一指示信息、所述第二指示信息和所述第三指示信息均承载于第一控制信息中。
  5. 根据权利要求4所述的方法，其特征在于，所述第一控制信息为媒体接入控制层控制单元MAC CE信令；
    所述MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域、半持续CSI报告配置域；
    所述辅小区指示域用于承载所述第一指示信息，所述半持续CSI-RS资源组域用于承载所述第二指示信息；所述半持续CSI报告配置域用于承载所述第三指示信息。
  6. 根据权利要求1所述的方法，其特征在于，所述第一信息承载于下行控制信息DCI中；
    所述方法还包括：
    所述终端设备确定默认索引对应的所述第一半持续CSI-RS资源。
  7. 根据权利要求4所述的方法，其特征在于，所述第一控制信息为DCI；
    所述方法还包括：
    所述终端设备确定与所述第一指示信息对应的所述第一辅小区；
    所述终端设备确定与所述第二指示信息对应的所述第一半持续CSI-RS资源；
    所述终端设备确定与所述第三指示信息对应的所述第一半持续CSI报告资源。
  8. 根据权利要求6或7所述的方法，其特征在于，所述DCI的DCI格式format为DCI format1-0，所述DCI中还包括设定取值的信息域，所述设定取值的信息域用于指示所述DCI用于激活所述第一辅小区；
    所述用于激活所述第一辅小区的DCI的比特总数和用于下行数据调度且DCI format1-0的DCI的比特总数相同。
  9. 根据权利要求6或7任一项所述的方法，其特征在于，还包括：
    所述终端设备发送混合自动重传请求HARQ信息，所述HARQ信息用于指示所述第一信息是否被正确接收。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，还包括：
    所述终端设备接收第二信息，所述第二信息用于去激活所述第一辅小区；
    所述终端设备停止使用所述第一半持续CSI-RS资源进行CSI测量。
  11. 一种通信方法，其特征在于，包括：
    网络设备发送第一信息，所述第一信息用于激活第一辅小区；
    所述网络设备接收信道状态信息CSI报告，所述CSI报告是所述终端设备在所述第一辅小区的激活过程中，使用第一半持续CSI-RS资源进行CSI测量得到的。
  12. 根据权利要求11所述的方法，其特征在于，所述第一信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示激活所述第一辅小区；所述第二指示信息用于指示激活所述第一半持续CSI-RS资源。
  13. 根据权利要求12所述的方法，其特征在于，所述第一信息还包括第三指示信息，所述第三指示信息用于指示激活第一半持续CSI报告资源；
    所述CSI报告是所述终端设备在主小区上或者在已经激活的辅小区上使用所述第一半持续CSI报告资源发送的。
  14. 根据权利要求13所述的方法，其特征在于，所述第一指示信息、所述第二指示信息和所述第三指示信息均承载于第一控制信息中。
  15. 根据权利要求14所述的方法，其特征在于，所述第一控制信息为媒体接入控制层控制单元MAC CE信令；
    所述MAC CE信令包括以下信息域：辅小区指示域、半持续CSI-RS资源组域、半持续CSI报告配置域；
    所述辅小区指示域用于承载所述第一指示信息，所述半持续CSI-RS资源组域用于承载所述第二指示信息；所述半持续CSI报告配置域用于承载所述第三指示信息。
  16. 根据权利要求11所述的方法，其特征在于，所述第一信息承载于下行控制信息DCI中，所述第一半持续CSI-RS资源为默认索引对应的半持续CSI-RS资源。
  17. 根据权利要求14所述的方法，其特征在于，所述第一辅小区是所述终端设备根据所述第一指示信息确定的，所述第一半持续CSI-RS资源是根据所述第二指示信息确定的，所述第一半持续CSI报告资源是根据所述第三指示信息确定的。
  18. 根据权利要求16或17所述的方法，其特征在于，所述DCI的DCI格式format为DCI format1-0，所述DCI中还包括设定取值的信息域，所述设定取值的信息域用于指示所述DCI用于激活所述第一辅小区；
    所述用于激活所述第一辅小区的DCI的比特总数和用于下行数据调度且DCI format1-0的DCI的比特总数相同。
  19. 根据权利要求16或17任一项所述的方法，其特征在于，还包括：
    所述终端设备发送混合自动重传请求HARQ信息，所述HARQ信息用于指示所述第一信息是否被正确接收。
  20. 根据权利要求11至19任一项所述的方法，其特征在于，还包括：
    所述网络设备发送第二信息，所述第二信息用于去激活所述第一辅小区。
  21. 一种装置，其特征在于，包括：处理器和接口电路，所述处理器用于通过所述接口电路与网络设备通信，并执行如权利要求1-10任一所述的方法。
  22. 一种装置，其特征在于，包括：处理器和接口电路，所述处理器用于通过所述接口电路与终端设备通信，并执行如权利要求11-20任一所述的方法。
  23. 一种装置，其特征在于，包括处理器，用于与存储器相连，调用所述存储器中存储的程序，以执行如权利要求1-10任一所述的方法。
  24. 一种装置，其特征在于，包括处理器，用于与存储器相连，调用所述存储器中存储的程序，以执行如权利要求11-20任一所述的方法。
  25. 一种装置，其特征在于，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得终端设备执行权利要求1-10任一所述方法。
  26. 一种装置，其特征在于，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得终端设备执行权利要求11-20任一所述方法。
  27. 一种存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得处理器执行如权利要求1-10任一所述的方法。
  28. 一种存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得处理器执行如权利要求11-20任一所述的方法。
  29. 一种通信系统，其特征在于，包括用于执行如权利要求1-10任一所述方法的装置和用于执行如权利要求11-20任一所述方法的装置。
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