Communication method, communication device and system

Abstract

The present application relates to the field of communication technology and discloses a communication method, a communication device and a system. The method includes: a terminal device receives first information from a network device, and the first information is used to activate a first secondary cell. During the process of activating the first secondary cell, the terminal device uses a first CSI-RS resource for channel CSI. The method can effectively solve the contradiction between the secondary cell activation delay and the air interface resource utilization.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, a communication device, and a system. Background Art

[0002] In wireless communication systems, as the number of users of smart terminals continues to grow, user traffic and data throughput are also increasing, which in turn puts higher requirements on communication bandwidth and speed. To this end, carrier aggregation (CA) technology has been introduced. The aggregated carrier contains multiple CCs (component carriers), and multiple CCs include a primary carrier and one or more secondary carriers. Through carrier aggregation, multiple continuous or discontinuous carrier components can be aggregated for use. In addition, the 5th generation mobile communication radio technology (5G NR) system also defines other frequency resources, such as bandwidth part (BWP), which solves the mobile communication demand for flexible bandwidth use and improves the utilization rate of scattered spectrum in the wireless band.

[0003] In current carrier aggregation scenarios, a downlink carrier unit often corresponds to an independent cell. The primary carrier corresponds to the primary cell, and the secondary carrier corresponds to the secondary cell. Terminal devices can transmit data between network devices through the primary cell, and also through the secondary cell. For terminal devices, the secondary cell must be activated before it can be used for data transmission. When the secondary cell is no longer needed for data transmission, the network side can deactivate the secondary cell through a deactivation command.

[0004] In the prior art, when the BWP is not activated, the terminal device activates the secondary cell by measuring periodic channel state information-reference signal (CSI-RS) resources and reporting valid CSI reports. However, the configuration of periodic CSI-RS resources needs to be modified through radio resource control (RRC) signaling reconfiguration, which has a slow scheduling speed. In order to speed up the secondary cell activation process and reduce the delay of secondary cell activation, the CSI-RS period used to activate the secondary cell is generally configured to be relatively short. However, after the cell activation is completed, if the CSI-RS resources are not modified through RRC signaling reconfiguration, they will continue to be transmitted on the air interface according to the previously configured shorter period. This will cause the CSI-RS to continue to be intensively transmitted on the air interface according to the shorter period, resulting in a waste of air interface resources and reduced air interface transmission efficiency. If the modification is performed through RRC signaling reconfiguration, the system measurement delay will be increased. Summary of the Invention

[0005] The existing mechanism uses periodic CSI-RS resources to complete the activation of the secondary cell. As a result, if you want to reduce the activation delay of the secondary cell, you need to configure a shorter CSI-RS period. However, the shorter CSI-RS period will lead to waste of air interface resources after the secondary cell is activated.

[0006] In view of this, the present application provides a communication method, a communication device, and a system, by which the contradiction between the activation delay of the secondary cell and the utilization rate of the air interface resources can be avoided.

[0007] In a first aspect, the present application provides a communication method, which includes: a terminal device receives first information, where the first information is used to activate a first secondary cell; during the activation process of the first secondary cell, the terminal device uses a first semi-persistent CSI-RS resource to perform channel state information CSI measurement.

[0008] In an embodiment of the present application, when BWP is not activated, the terminal device can complete the activation of the secondary cell through the semi-persistent CSI-RS resources, thereby improving the utilization rate of the semi-persistent CSI-RS resources. Since the activation state and deactivation state of the semi-persistent CSI-RS resources can be set through MAC CE signaling or DCI, this method can realize flexible activation and deactivation of the secondary cell.

[0009] In one possible design, the first information may include first indication information and second indication information, where the first indication information is used to indicate activation of the first secondary cell; and the second indication information is used to indicate activation of the first semi-persistent CSI-RS resource.

[0010] In the embodiment of the present application, 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.

[0011] In one possible design, the period of the first semi-persistent CSI-RS resource activated as indicated by the second indication information is smaller than that of other activated semi-persistent CSI-RS resources or periodic CSI-RS resources. When the terminal device uses a semi-persistent CSI-RS resource with a smaller configured period during the activation process, the secondary cell activation can be accelerated and the delay required for the activation process of the first secondary cell can be reduced.

[0012] In one possible design, the first information may further include third indication information, where the third indication information is used to indicate activation of a first semi-persistent CSI reporting resource. The method further includes: the terminal device sending a CSI report on a primary cell or an activated secondary cell using the first semi-persistent CSI reporting resource. This design simplifies the use of CSI reporting resources, improves the utilization of semi-persistent CSI-RS resources, and reduces the activation delay of the secondary cell.

[0013] In an embodiment of the present application, 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 to perform CSI measurement. 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.

[0014] In one possible design, the first control information is MAC CE signaling; the MAC CE signaling includes the following information fields: a secondary cell indication field and a semi-persistent CSI-RS resource group field. The secondary cell indication field is used to carry the first indication information, and the semi-persistent CSI-RS resource group field is used to carry the second indication information.

[0015] In an embodiment of the present application, on the one hand, the network device can combine the first indication information and the second indication information in a single MAC CE signaling, thereby simplifying the use process of semi-persistent CSI-RS resources during the secondary cell activation process, thereby reducing the activation delay of the SCell. On the other hand, the method can support the use of semi-persistent CSI-RS resources during the SCell activation process. Because the activation state and deactivation state of the semi-persistent CSI-RS resources can be set through MAC CE signaling, the method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources, while also improving the utilization of semi-persistent CSI-RS resources.

[0016] In one possible design, the first control information is MAC CE signaling; the MAC CE signaling includes the following information fields: a secondary cell indication field, a semi-persistent CSI-RS resource group field, and a 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, and the semi-persistent CSI report configuration field is used to carry the third indication information.

[0017] In an embodiment of the present application, on the one hand, the network device can combine the first indication information and the second indication information, or combine the first indication information, the second indication information, and the third indication information in one MAC CE signaling, thereby simplifying the use process of semi-persistent CSI-RS resources in the secondary cell activation process, thereby reducing the activation delay of the SCell. On the other hand, 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 state and deactivation state of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be set through MAC CE signaling, the method can achieve flexible activation and deactivation of the secondary cell, thereby improving the utilization of air interface resources.

[0018] In one possible design, the first information is carried in the downlink control information DCI; the method also includes: the terminal device determines the first half-persistent CSI-RS resource corresponding to the default index.

[0019] In the embodiment of the present application, since the information bits in the DCI are limited, the embodiment of the present application can simplify the content in the DCI that carries the first information in the above manner.

[0020] In one possible design, the first control information is DCI; the method also includes: the terminal device determines the first secondary cell corresponding to the first indication information; the terminal device determines the first half-continuous CSI-RS resource corresponding to the second indication information; the terminal device determines the first half-continuous CSI report resource corresponding to the third indication information.

[0021] In the embodiments of the present application, on the first hand, the network device can combine the first indication information, the second indication information and the third indication information in one DCI, thereby simplifying the use process of the semi-persistent CSI-RS resources in the secondary cell activation process, thereby reducing the activation delay of the SCell. On the second hand, the method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process. Since the activation state and deactivation state of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be set through DCI, the method can realize flexible activation and deactivation of the secondary cell, thereby improving the utilization rate of the air interface resources. On the third hand, since the transmission delay of the DCI is less than the transmission delay of the MAC CE signaling, the implementation method can more effectively reduce the activation delay of the secondary cell.

[0022] In one possible design, the DCI format format of the DCI is DCI format1-0, and the DCI further includes an information field for setting a value, where the information field for setting a value is used to indicate that the DCI is used to activate the first secondary cell;

[0023] The total number of bits of the DCI used to activate the first secondary cell is the same as the total number of bits of the DCI used for downlink data scheduling and in DCI format 1-0.

[0024] In the embodiment of the present application, the existing DCI format is reused to carry the first information, which has high compatibility.

[0025] In one possible design, the terminal device sends hybrid automatic repeat request HARQ information, where the HARQ information is used to indicate whether the first information is correctly received.

[0026] In one possible design, the terminal device receives second information, where the second information is used to deactivate the first secondary cell; the terminal device stops using the first semi-persistent CSI-RS resources for CSI measurement.

[0027] In a second aspect, the present application further provides a communication method, the method comprising: a network device sending first information, where the first information is used to activate a first secondary cell;

[0028] The network device receives a channel state information CSI report, where the CSI report is obtained by the terminal device during activation of the first secondary cell by using the first half-persistent CSI-RS resource to perform CSI measurement.

[0029] In an embodiment of the present application, when BWP is not activated, the terminal device can complete the activation of the secondary cell through semi-persistent CSI-RS resources, thereby improving the utilization rate of the semi-persistent CSI-RS resources. Since the activation state and deactivation state of the semi-persistent CSI-RS resources can be set through MAC CE signaling or DCI, this method can realize flexible activation and deactivation of the secondary cell.

[0030] In one possible design, 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 resource.

[0031] In the embodiment of the present application, 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.

[0032] In one possible design, the period of the first semi-persistent CSI-RS resource activated as indicated by the second indication information is smaller than that of other activated semi-persistent CSI-RS resources or periodic CSI-RS resources. When the terminal device uses a semi-persistent CSI-RS resource with a smaller configured period during the activation process, the secondary cell activation can be accelerated and the delay required for the activation process of the first secondary cell can be reduced.

[0033] In an embodiment of the present application, 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 to perform CSI measurement. 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.

[0034] In one possible design, the first control information is MAC CE signaling; the MAC CE signaling includes the following information fields: a secondary cell indication field and a semi-persistent CSI-RS resource group field. The secondary cell indication field is used to carry the first indication information, and the semi-persistent CSI-RS resource group field is used to carry the second indication information.

[0035] In an embodiment of the present application, on the one hand, the network device can combine the first indication information and the second indication information in a single MAC CE signaling, thereby simplifying the use process of semi-persistent CSI-RS resources during the secondary cell activation process, thereby reducing the activation delay of the SCell. On the other hand, the method can support the use of semi-persistent CSI-RS resources during the SCell activation process. Because the activation state and deactivation state of the semi-persistent CSI-RS resources can be set through MAC CE signaling, the method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources, while also improving the utilization of semi-persistent CSI-RS resources.

[0036] In one possible design, the first control information is MAC CE signaling; the MAC CE signaling includes the following information fields: a secondary cell indication field, a semi-persistent CSI-RS resource group field, and a 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, and the semi-persistent CSI report configuration field is used to carry the third indication information.

[0037] In an embodiment of the present application, on the one hand, the network device can combine the first indication information and the second indication information, or combine the first indication information, the second indication information, and the third indication information in one MAC CE signaling, thereby simplifying the use process of semi-persistent CSI-RS resources in the secondary cell activation process, thereby reducing the activation delay of the SCell. On the other hand, 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 state and deactivation state of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be set through MAC CE signaling, the method can achieve flexible activation and deactivation of the secondary cell, thereby improving the utilization of air interface resources.

[0038] In one possible design, 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.

[0039] In the embodiment of the present application, since the information bits in the DCI are limited, the embodiment of the present application can simplify the content in the DCI that carries the first information in the above manner.

[0040] In one possible design, the first secondary cell is determined by the terminal device according to the first indication information, the first half-persistent CSI-RS resource is determined according to the second indication information, and the first half-persistent CSI report resource is determined according to the third indication information.

[0041] In the embodiments of the present application, on the first hand, the network device can combine the first indication information, the second indication information and the third indication information in one DCI, thereby simplifying the use process of the semi-persistent CSI-RS resources in the secondary cell activation process, thereby reducing the activation delay of the SCell. On the second hand, the method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process. Since the activation state and deactivation state of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be set through DCI, the method can realize flexible activation and deactivation of the secondary cell, thereby improving the utilization rate of the air interface resources. On the third hand, since the transmission delay of the DCI is less than the transmission delay of the MAC CE signaling, the implementation method can more effectively reduce the activation delay of the secondary cell.

[0042] In one possible design, the DCI format of the DCI is DCI format1-0, and the DCI also includes an information field with a set value, and the information field with the set value is used to indicate that the DCI is used to activate the first secondary cell; the total number of bits of the DCI used to activate the first secondary cell is the same as the total number of bits of the DCI used for downlink data scheduling and DCI format1-0.

[0043] In the embodiment of the present application, the existing DCI format is reused to carry the first information, which has high compatibility.

[0044] In one possible design, the terminal device sends hybrid automatic repeat request HARQ information, where the HARQ information is used to indicate whether the first information is correctly received.

[0045] In one possible design, the network device sends second information, where the second information is used to deactivate the first secondary cell.

[0046] In a third aspect, embodiments of the present application provide an apparatus. In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus in performing the corresponding network device functions in the above-described method. For example, the apparatus generates first indication information. The communication unit is configured to support the apparatus in communicating with other devices to implement receiving and / or transmitting functions. For example, the apparatus transmits the first indication information.

[0047] Optionally, the apparatus may further include one or more memories coupled to the processor to store program instructions and / or data necessary for the network device. The one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited thereto.

[0048] The apparatus may be a base station, a gNB, or a Transmitter Relay Protocol (TRP), and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input / output circuit or an interface.

[0049] The device may also be a communication chip. The communication unit may be an input / output circuit or an interface of the communication chip.

[0050] In another possible design, the above-mentioned device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver to transmit and receive signals, the memory is used to store a computer program, and the processor is used to execute the computer program in the memory, so that the device performs the method performed by the network device in the second aspect or any possible implementation of the second aspect.

[0051] In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus in performing the corresponding functions of the terminal device in the above method. For example, determining the second parameter. The communication unit is configured to support the apparatus in communicating with other devices to implement receiving and / or sending functions. For example, receiving the first indication information.

[0052] Optionally, the device may further include one or more memories coupled to the processor to store program instructions and / or data necessary for the device. The one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited thereto.

[0053] The device may be a smart terminal or a wearable device, etc., and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input / output circuit or an interface.

[0054] The device may also be a communication chip. The communication unit may be an input / output circuit or an interface of the communication chip.

[0055] In another possible design, the above-mentioned device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver to transmit and receive signals, the memory is used to store a computer program, and the processor is used to execute the computer program in the memory, so that the device performs the method performed by the terminal device in the first aspect or any possible implementation of the first aspect.

[0056] In a fourth aspect, a system is provided, which includes the above-mentioned terminal device and network device.

[0057] In a fifth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method in the first aspect or any possible implementation of the first aspect.

[0058] In a sixth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method in the second aspect or any possible implementation of the second aspect.

[0059] In a seventh aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the above-mentioned first aspect or any possible implementation of the first aspect.

[0060] In an eighth aspect, a computer program product is provided, comprising: a computer program code, which, when executed on a computer, enables the computer to execute the method in the second aspect and any possible implementation of the second aspect.

[0061] The method provided in the embodiment of the present application can provide a method for determining power and / or power margin in a multi-beam scenario, which is suitable for power control or power margin reporting in a multi-beam scenario, for example, power control or power margin reporting of an NR system. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1A and Figure 1B A possible network architecture diagram provided for this application;

[0063] Figure 2 A flow chart of a communication method provided in an embodiment of the present application;

[0064] Figure 3 A schematic diagram of the relationship between download waves and cells in a CA scenario provided in an embodiment of the present application;

[0065] Figure 4 A MAC CE signaling structure provided in an embodiment of the present application;

[0066] Figure 5A Another MAC CE signaling structure provided in an embodiment of the present application;

[0067] Figure 5B and Figure 5C Schematic diagram of CSI-RS resources and CSI reporting resources provided in an embodiment of the present application;

[0068] Figure 6 A flow chart of another communication method provided in an embodiment of the present application;

[0069] Figure 7 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0070] Figure 8 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0071] Figure 9 A schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0073] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system, such as new radio access technology (NR), and future communication systems such as 6G system.

[0074] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0075] Additionally, in the embodiments of this application, the word "exemplary" is used to indicate an example, illustration, or description. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0076] In the embodiments of the present application, the terms "information," "signal," "message," and "channel" may be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they convey are the same. The terms "of," "corresponding," and "relevant" may be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they convey are the same.

[0077] It should be understood that the character “ / ” in this article generally indicates that the previous and next associated objects are in an “or” relationship, but it may also indicate an “and / or” relationship. Please refer to the previous and next context for specific understanding.

[0078] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.

[0079] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0080] The embodiments of the present application can be applied to both time division duplex (TDD) and frequency division duplex (FDD) scenarios.

[0081] The embodiments of the present application can be applied not only in traditional typical networks, but also in 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. Each small station is a transmission point (TP) or TRP) of the hyper cell and is connected to a centralized controller. When the UE moves within the hyper cell, the network side device selects a new sub-cluster for the UE to serve it, thereby avoiding actual cell switching and achieving continuity of UE services. Among them, the network side device includes wireless network equipment.

[0082] In the embodiments of the present application, some scenarios are described using the scenarios of the NR network in the wireless communication network as an example. It should be noted that the solutions in the embodiments of the present application can also be applied to other wireless communication networks, and the corresponding names can also be replaced by the names of corresponding functions in other wireless communication networks.

[0083] To facilitate understanding of the embodiments of the present application, first Figure 1A The communication system shown in FIG. 1 is used as an example to describe in detail a communication system applicable to an embodiment of the present application. Figure 1AA schematic diagram of a communication system applicable to a communication method according to an embodiment of the present application is shown. To make the objectives, technical solutions, and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings. The specific operating methods in the method embodiments can also be applied to device embodiments or system embodiments. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0084] Figure 1A This is a schematic diagram of a network architecture in a carrier aggregation scenario applicable to the present application. The network architecture includes a network device 100 and a terminal device 120, and two downlink carrier units: CC1 and CC2. CC1 and CC2 of the network device 100 operate at different frequencies.

[0085] 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 a user, or a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. The terminal device may communicate with one or more core networks or the Internet via a radio access network (e.g., a radio access network, RAN). The terminal device may be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone, mobile phone), a computer, and a data card. For example, the terminal device may be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers, and computers with wireless transceiver capabilities. A wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station (remotestation), an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), etc. A terminal device may 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 evolved public land mobile network (PLMN) network, a terminal device in an NR communication system, etc.

[0086] A network device (e.g., a macro base station) 100 is an entity on the network side for transmitting or receiving signals, and the network device can be a device for communicating with a mobile device. The network device can be an AP in a wireless local area network (WLAN), an evolutionary Node B (eNB or eNodeB) in long term evolution (LTE), or a relay station or access point, or a network device in a vehicle-mounted device, a wearable device, or a future 5G network, or a network device in a future evolved public land mobile network (PLMN), or a next-generation base station (gNodeB) in an NR system.

[0087] In addition, in an embodiment of the present application, the network device provides services for a cell, and the terminal device communicates with the network device through the communication resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services. In addition, in other possible cases, the network device may be other devices that provide wireless communication functions for the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For the convenience of description, in the embodiments of the present application, the device that provides wireless communication functions for the terminal device is referred to as a network device.

[0088] Figure 1BThis is a schematic diagram of a network architecture in a dual-connectivity (DC) scenario applicable to this application, which includes two cell groups: a master cell group (MCG) and a secondary cell group (SCG). The MCG includes a primary cell (PCell) or additionally includes one or more secondary cells (SCell), and the SCG includes a primary secondary cell (PSCell) or additionally includes one or more SCells. The network device that manages the MCG is called a primary network device or a primary node, and the network device that manages the SCG is called a secondary network device or a secondary node.

[0089] During 5G network deployment, 5G cells can be used as either macro coverage networks (as primary network equipment) or small base stations (as secondary network equipment) to enhance the coverage and capacity of existing LTE networks. Regardless of the networking method used, dual connectivity technology can be used to interconnect LTE and 5G systems, thereby improving wireless resource utilization across the entire mobile network, reducing system handover latency, and enhancing user and system performance.

[0090] In the embodiment of the present application, the primary network device may be an LTE network device (such as an eNB), a 5G network device (such as a gNB), or one of future communication network devices, and the secondary network device may also be an LTE network device, a 5G network device, or one of future communication network devices. The primary network device and the secondary network device may be network devices of the same standard, such as both being eNBs, or network devices of different standards, such as the primary network device being an eNB and the secondary network device being a gNB. This application does not limit the communication standards of the primary network device and the secondary network device.

[0091] It should be understood that Figure 1A and Figure 1B This is a simplified schematic diagram for ease of understanding only. The communication system may further include other network devices or other terminal devices. Figure 1A and Figure 1B Not drawn in.

[0092] The following is an explanation of some communication terms or terminology used in this application, which are also part of the invention content of this application.

[0093] 1. Carrier Aggregation (CA)

[0094] Carrier aggregation is the aggregation of two or more component carriers (CCs) to support a larger transmission bandwidth.

[0095] Among them, one downlink carrier unit corresponds to an independent cell. Generally, one downlink carrier unit can be equated with one cell. One cell can contain one downlink carrier and one uplink carrier, or it can contain only one downlink carrier. In the TDD duplex mode, the downlink carrier and the uplink carrier are on the same carrier. In order to efficiently utilize fragmented spectrum, 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, intra-band non-continuous carrier aggregation, and inter-band non-continuous carrier aggregation.

[0096] The carrier component corresponding to the primary cell (PCell) is called the primary component carrier (PCC). The downlink carrier of the PCell is called the DLPCC, and the uplink carrier of the PCell is called the ULPCC. The PCell can be the cell to which the terminal device initially connects, the cell to which the RRC connection is reestablished, or the primary cell designated during a cell handover. The PCell is responsible for RRC communication with the terminal device.

[0097] The carrier component corresponding to the SCell (secondary cell) is called a secondary component carrier (SCC). The downlink carrier of the SCell is called a DL SCC, and the uplink carrier of the SCell is called a 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 after the initial security activation procedure. There is no RRC communication between the SCell and the terminal device.

[0098] A serving cell is a cell that provides services (uplink and downlink transmission) to a terminal device. If a terminal device is in the RRC_CONNECTED state but not configured with Carrier Access Control (CA), it has only one serving cell, the PCell. If a terminal device is in the RRC_CONNECTED state and configured with Carrier Access Control (CA), its serving cells include the PCell and all SCells. In other words, a serving cell can refer to either the PCell or the SCell. Both the PCell and the SCell are serving cells.

[0099] 2. Dual Connectivity (DC)

[0100] Dual connectivity means that at least two carriers used for aggregation are on different base stations.

[0101] The primary base station and the secondary base station each have at least one carrier, namely the primary cell and the primary and secondary cells, respectively. The primary base station and the secondary base station may also have other secondary carriers. Terminal devices can communicate with the network through the primary base station and the secondary base station.

[0102] 3. Primary cell (PCell)

[0103] The primary cell may be a cell where the terminal device establishes an initial connection, or the primary cell may be a cell where the terminal device reestablishes a radio resource control (RRC) connection, or the primary cell may be a primary cell designated during a handover, etc. The primary cell is mainly used for RRC communication with the terminal device. The carrier component corresponding to the primary cell is called a primary component carrier (PCC), the downlink carrier of the primary carrier component is called a downlink primary carrier component (DLPCC), and the uplink carrier of the primary carrier component is called an uplink primary carrier component (UL PCC). The primary carrier component may also be referred to as a primary carrier. In the embodiment of the present application, the primary carrier is taken as an example for illustration.

[0104] 4. Secondary cell (SCell)

[0105] 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 can be added during RRC reconfiguration. The carrier component corresponding to the secondary cell is called a secondary component carrier (SCC). The downlink carrier of the secondary carrier component is called a downlink secondary carrier component (downlink SCC, DL SCC), and the uplink carrier of the secondary carrier component is called an uplink secondary carrier component (uplink SCC, UL SCC). The secondary carrier component can also be called a secondary carrier. In the embodiments of the present application, the secondary carrier is taken as an example for explanation.

[0106] For example, the primary cell may be determined when the connection is established, and the secondary cell may be added, modified, or released through an RRC connection reconfiguration message after the initial access is completed.

[0107] 5. Activation and Deactivation of Secondary Cells

[0108] The primary cell of a terminal device does not support activation or deactivation and is always active. Except for the PCell, configured SCells are not immediately usable. To better manage battery consumption in terminal devices configured with Carrier Access Control (CA), the communication system provides an SCell activation / deactivation mechanism. Activating an SCell requires performing CSI measurements and reporting valid CSI reports.

[0109] For example, if a secondary cell is activated, the terminal device may perform one or more of the following operations within the carrier component corresponding to the activated secondary cell:

[0110] Send a sounding reference signal (SRS); report channel state information (CSI); detect the secondary cell and the physical downlink control channel (PDCCH) transmitted on the secondary cell; if the physical uplink control channel (PUCCH) is configured to be transmitted on the carrier, it is necessary to send PUCCH; start or restart the secondary cell deactivation timer (Scell deactivation timer); trigger the power headroom report (PHR) reporting, etc.

[0111] If a secondary cell is deactivated, the terminal device may not perform at least the following operations within the carrier component corresponding to the deactivated secondary cell:

[0112] Do not send SRS; do not report CSI; do not transmit uplink data, which may include uplink synchronization channel (UL-SCH) and random access channel (RACH), etc.; do not detect the secondary cell and the PDCCH transmitted on the secondary cell; do not send PUCCH, etc.

[0113] Since BWP is configured in a cell, before a secondary cell is activated, all BWPs configured in that secondary cell are in an inactive state. The above cell activation operations are performed after BWP activation. When a secondary cell is activated, at least one BWP is also activated at the same time.

[0114] 6. Bandwidth part (BWP)

[0115] BWP is a group of continuous or non-contiguous physical resources on a carrier. The physical resources can be physical resource blocks (RBs), physical resource block groups (RBGs), or physical resource elements (REs). The network equipment can configure one or more BWPs for the terminal device in a cell. 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. BWP can include an initial active BWP and a UE-specific BWP. On the secondary carrier, it can also include a first active BWP.

[0116] The initially activated BWP may refer to the BWP used by the terminal device for data reception or transmission before receiving dedicated BWP configuration information. The configuration may be performed through a broadcast message, and the broadcast message may include a master information block (MIB) and a system information block (SIB). Alternatively, the initially activated BWP may refer to the BWP used for initial access. The initially activated BWP may include an initial downlink BWP and an initial uplink BWP.

[0117] A UE-specific BWP is the BWP used by a terminal device for data reception or transmission after initial access is completed and dedicated BWP configuration information is received. For example, the dedicated BWP configuration information may be RRC. For a terminal, four BWPs may be configured on a serving cell, for example. These four BWPs may not include the initial activation BWP configured via a broadcast message. At any given moment, one or more BWPs may be activated, and the activated BWP is referred to as the active BWP.

[0118] For example, the network device may send downlink control information (DCI) to the terminal device, and the DCI may be used to indicate the activation of the BWP, and the activated BWP may be the above-mentioned UE-specific BWP. The network device and the terminal device may communicate on the above-mentioned activated BWP for transmitting ultra reliable and low latency communications (URLLC) services, enhanced mobile broadband (eMBB) services, vehicle to everything (V2X) services, and machine-type communication (MTC) positioning, etc., or the BWP may be a service-specific BWP, such as a sidelink BWP used only for V2X services.

[0119] 7. Media Access Control Element (MACCE)

[0120] MAC CE signaling is the control information that network devices and terminal devices use to interact through the MAC layer. The activation and deactivation commands for existing secondary cells are instructed by the network device to send activation / deactivation MAC CEs to the terminal device. For a configured but inactive SCell, the terminal device can activate the SCell based on the information in the MAC CE. Furthermore, for an activated SCell, the network device can deactivate one or more activated SCells through the MAC CE. In addition, the terminal device can also deactivate an SCell based on the SCell deactivation timer mechanism.

[0121] 8. Downlink Control Information (DCI)

[0122] DCI is information sent by a network device to a terminal device. For example, a network device can send DCI via the Physical Downlink Control Channel (PDCCH). DCI can be used to schedule uplink or downlink data transmission. For example, the communication interface between a network device and a terminal device is an air interface (Uu interface), and uplink and downlink data transmission can be performed on the Uu interface. Uplink data transmission refers to data transmission from a terminal device to the network device, and downlink data transmission refers to data transmission from the network device to the terminal device.

[0123] 9. CSI-RS Resources and CSI Report Resources

[0124] There are three types of CSI-RS resources: periodic CSI-RS resources, semi-persistent CSI-RS resources (SP CSI-RS), and aperiodic CSI-RS resources. There are also three types of CSI report resources: periodic CSI report resources, semi-persistent CSI report (SP CSI report) resources, and aperiodic CSI report resources.

[0125] Among them, the activation status 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 takes effect; the so-called deactivation means that the relevant configuration information becomes invalid. For example, the semi-persistent CSI-RS resource will first be configured with a sending period, but before the semi-persistent CSI-RS resource is activated through MAC CE, the semi-persistent CSI-RS resource is in a deactivated state (also called an inactivated state) and does not actually send CSI-RS. After the semi-persistent CSI-RS resource is activated through MAC CE, the network side will send CSI-RS according to the configured sending period. Correspondingly, when the semi-persistent CSI-RS resource is in an activated state, when the network side deactivates the semi-persistent CSI-RS resource through MAC CE, the network side will stop sending CSI-RS.

[0126] It is understandable that since a cell contains only one downlink carrier, and the downlink carrier is an indispensable carrier for a cell, the terms "cell" and "carrier" in the embodiments of this application can be used equivalently. Unless otherwise specified, the embodiments of this application use "cell" as an example for explanation. In addition, in the description of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be understood as indicating or implying relative importance or order.

[0127] like Figure 2 As shown, the present application provides a communication method process, which is used to activate the secondary cell. The network device in the process can be the above-mentioned Figure 1A The network device 100 in the embodiment of the present invention, the terminal device may be the above-mentioned Figure 1A The terminal device 120 in the embodiment of the present invention is shown in FIG. 1 . It is understood that the functions of the network device can also be implemented by a chip applied to the network device, or by other devices to support the implementation of the network device; the functions of the terminal device can also be implemented by a chip applied to the terminal device, or by other devices to support the implementation of the terminal device. The specific process can be:

[0128] Step 201: The network device sends first information to the terminal device, where the first information is used to activate a first secondary cell.

[0129] The first information may be carried in control information, such as 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.

[0130] Step 202: The terminal device receives the first information and performs CSI measurement using the first semi-persistent CSI-RS resource during activation of the first secondary cell.

[0131] Optionally, step 203 may also be included, where the terminal device sends a CSI report to the network device.

[0132] Exemplarily, the control information may include activation commands for one or more cells, and the control information may also include deactivation commands for one or more cells, or in other words, the control information may include both one or more cell activation commands and one or more cell deactivation commands. In the embodiments of the present application, the activation of a secondary cell (i.e., the first secondary cell) is taken as an example. When the control information also includes activation commands or deactivation commands for other secondary cells, the activation process or deactivation process of the other secondary cells is similar to the activation or deactivation process of the first secondary cell, and will not be repeated.

[0133] For example, when the above method is applied to Figure 1B In the communication system under the DC scenario shown, since the PCell on the primary network device is used for the interaction of RRC control signaling between the terminal device side and the network device side, the primary network 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 can actively send this configuration information to the secondary network device. The configuration information of the secondary cell includes: information on semi-persistent CSI-RS resources, information on semi-persistent CSI report resources, etc.

[0134] Based on the above scheme, when BWP is not activated, the terminal device can complete the activation of the secondary cell through the semi-persistent CSI-RS resources, thereby improving the utilization rate of the semi-persistent CSI-RS resources. Since the activation status and deactivation status of the semi-persistent CSI-RS resources can be set through MAC CE signaling or DCI, this method can realize flexible activation and deactivation of the secondary cell.

[0135] Below Figure 2 Various scenarios of the illustrated embodiments are described.

[0136] In case 1, the first information may include second indication information in addition to the first indication information, where the second indication information is used to indicate activation of the first semi-persistent CSI-RS resource.

[0137] This scenario 1 further includes the following scenarios 1.1 to 1.2.

[0138] In case 1.1, the first indication information may be carried in one MAC CE signaling or DCI, and the second indication information may be carried in another MAC CE signaling or DCI.

[0139] In scenario 1.2, 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.

[0140] In this situation 1, the above-mentioned step 202 is specifically as follows: the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first half-persistent CSI-RS resource corresponding to the second indication information, so the terminal device activates the first secondary cell, and during the activation process, uses the first half-persistent CSI-RS resource to perform CSI measurement.

[0141] In this scenario 1, the above step 203 specifically includes: the terminal device sends the CSI report on the primary cell or on the activated secondary cell using the existing configured CSI reporting resources.

[0142] In one possible example, the period of the first semi-persistent CSI-RS resource activated as indicated by the second indication information is smaller than that of other activated semi-persistent CSI-RS resources or periodic CSI-RS resources. When the terminal device uses a semi-persistent CSI-RS resource with a smaller configured period during the activation process, it can speed up the activation of the secondary cell, simplify the use of the semi-persistent CSI-RS resource, improve the utilization rate of the semi-persistent CSI-RS resource, and reduce the activation delay of the secondary cell.

[0143] In case 2, the first information includes not only the first indication information and the second indication information, but also third indication information. The third indication is used to indicate activation of the first semi-persistent CSI reporting resource.

[0144] This scenario 2 further includes the following scenarios 2.1 to 2.3.

[0145] In case 2.1, the first indication information may be carried in the first MAC CE signaling or the first DCI, the second indication information may be carried in the second MAC CE signaling or the second DCI, and the third indication information may be carried in the third MAC CE signaling or the third DCI.

[0146] In case 2.2, 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 may be carried in another MAC CE signaling or DCI.

[0147] In scenario 2.3, 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.

[0148] In this situation 2, the above-mentioned step 202 is specifically as follows: the terminal device determines the first secondary cell corresponding to the first indication information, and determines the first half-continuous CSI-RS resource corresponding to the second indication information, so the terminal device activates the first secondary cell, and during the activation process, uses the first half-continuous CSI-RS resource to perform CSI measurement.

[0149] In this scenario 2, the above step 203 is specifically: the terminal device determines the first CSI reporting resource corresponding to the third indication information, and then the terminal device uses the first CSI reporting resource to send a CSI report on the primary cell or on the activated secondary cell.

[0150] In one possible example, the period of the first CSI reporting resource activated as indicated by the third indication information is smaller than the period of other activated semi-continuous CSI reporting resources or the period of periodic CSI reporting resources. When the terminal device uses a semi-continuous CSI reporting resource with a smaller configured period during the activation process, the activation of the secondary cell can be accelerated and the delay required for the activation process of the first secondary cell can be reduced.

[0151] In scenario 3, the first information only includes the first indication information. The first indication information may be carried in the DCI.

[0152] This scenario 3 further includes the following scenarios 3.1 to 3.2.

[0153] In Scenario 3.1, step 202 is 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 corresponding to the default index. Therefore, the terminal device activates the first secondary cell and, during the activation process, uses the first semi-persistent CSI-RS resource for CSI measurement.

[0154] The above step 203 is specifically: the terminal device sends the CSI report on the primary cell or on the activated secondary cell using the existing configured CSI reporting resources.

[0155] 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. In addition, the terminal device determines the first half-continuous CSI-RS resources and the first half-continuous CSI report resources corresponding to the default index. Therefore, the terminal device activates the first secondary cell, and during the activation process, uses the first half-continuous CSI-RS resources for CSI measurement.

[0156] The above step 203 is specifically: the terminal device sends a CSI report on the primary cell or on the activated secondary cell using the first half of the persistent CSI reporting resources.

[0157] against Figure 2 The communication method shown is given as an example. Four different specific implementation methods are given below. Among them, the following implementation method 1 is the specific implementation process of the above scenario 1.2, the following implementation method 2 is the specific implementation process of the above scenario 2.3, and the following implementation methods 3 and 4 are the specific implementation processes of the above scenario 3.2. The following embodiments of the present invention take supporting a maximum of 16 cell aggregations as an example. The specific number of cells supported can be adjusted as needed and does not limit the present invention. It should be noted that in actual applications, it is not limited to the following four implementation methods.

[0158] Implementation method 1

[0159] For example, Figure 3 As shown, SCell 1 is the first secondary cell to be activated, and the first half of the continuous CSI-RS resources are the resources on the DL SCC. After the terminal device receives the activation command of SCell 1, the terminal device uses the first half of the continuous CSI-RS resources on the DL SCC of SCell 1 to measure CSI, and then the terminal device sends the CSI report through the CSI report resources on the UL CC of PCell.

[0160] In a possible example, in the above step 201, 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.

[0161] Among them, the MAC CE structure is as follows Figure 4 shown. Figure 4 The information fields in the MAC CE include: secondary cell indication field, semi-persistent CSI-RS resource group field, TCI status field of the resource group, and reserved field.

[0162] The meaning of each information field is as follows:

[0163] (1) Ci refers to the secondary cell indication field, which is used to indicate the activation / deactivation status 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. Figure 4 Oct in the field indicates that the Internet standard uses an octet, that is, 1 octet = 8 bits. If no secondary cell corresponding to the index number field is configured, the content of this field is ignored.

[0164] (2) Semi-persistent CSI-RS resource group ID i (i.e., SP CSI-RS resource set ID i) refers to the semi-persistent CSI-RS resource group field, which contains the index of a CSI-RS resource group (also called a CSI-RS resource set) consisting of one or more semi-persistent CSI-RS resources. The CSI-RS resource here can be a non-zero power channel state information reference signal resource (NZP CSI-RS resource), so the semi-persistent CSI-RS resource group ID can be the index (ID) of the NZP CSI-RS resource NZP-CSI-RS-ResourceSet, which 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 supports a maximum of 64 CSI-RS resource groups configured in one cell); when Ci is set to 1, it indicates that the semi-persistent CSI-RS resource group corresponding to SP CSI-RS resource set ID i in the cell corresponding to Ci is activated; otherwise, it indicates that the semi-persistent CSI-RS resource group corresponding to SP CSI-RS resource set IDi is deactivated. Optionally, when Ci is set to 0, it can also indicate that all semi-persistent CSI-RS resource groups in the corresponding cell are deactivated.

[0165] (3) Resourceset ID i TCI state ID (i.e., Resource set IDi TCI State ID) refers to the resource group TCI state field, which refers to the TCI state of the CSI-RS resources in the semi-persistent CSI-RS resource group. This field contains the index TCI-StateId of the TCI state of the semi-persistent CSI-RS resource group, which is used as the quasi-colocation (QCL) source of the resources in the semi-persistent NZP CSI-RS resource group (set) indicated by the semi-persistent CSI-RS resource group (set) ID i. TCIState ID0 represents the TCI state of the first resource in the SP CSI-RS resource group. Since a semi-persistent CSI-RS resource group (also called a semi-persistent CSI-RS resource set) includes at least one semi-persistent CSI-RS resource, TCI ID0 must exist. When a semi-persistent CSI-RS resource group includes more semi-persistent CSI-RS resources, the MAC CE signaling can also include TCI State ID1 of the second resource, and so on. The length of each TCI State ID in this field is 7 bits (TCI states support up to 128 types). If the Ci field is set to 0, the octet containing the TCI State ID0 field may not exist.

[0166] (4) R (reversed) refers to the reserved field, indicating the reserved bits, which are set to 0.

[0167] The CSI-RS resources are configured for a specific BWP on a specific cell, that is, the CSI-RS resources on a specific cell will be associated with a BWP. The CSI-RS resources indicated by the MAC CE or DCI will also be associated with a specific downlink BWP. In order to clarify the BWP information associated with the CSI-RS resources, the BWP index (BWP ID) information (not shown in the figure) can be included in the indication information. In order to simplify the indication information during the cell activation process, the indication information of the BWP can be simplified, that is, the association method 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 can be the BWP corresponding to the firstActive DL BWP ID in the RRC configuration. It can also be the BWP corresponding to the minimum or maximum BWP ID in the default configured downlink BWP ID. This example can be understood as that the CSI-RS resources in the indication information are CSI-RS resources associated with the default BWP.

[0168] Based on the MAC CE structure, the secondary cell indication field is used to carry the first indication information, and the semi-persistent CSI-RS resource group field is used to carry the second indication information.

[0169] Based on this implementation method, on the one hand, the network device can combine the first indication information and the second indication information in a single MAC CE signaling, thereby simplifying the use of semi-persistent CSI-RS resources during the secondary cell activation process, thereby reducing the activation latency of the SCell. On the other hand, this method can support the use of semi-persistent CSI-RS resources during the SCell activation process. Because the activation and deactivation states of semi-persistent CSI-RS resources can be set through MAC CE signaling, this method can flexibly activate and deactivate the secondary cell, thereby improving the utilization of air interface resources and the utilization of semi-persistent CSI-RS resources.

[0170] Implementation method 2

[0171] For example, Figure 3 As shown, SCell 1 is the first secondary cell to be activated, the first half of the persistent CSI-RS resources are the resources on the DL SCC, and the first half of the persistent CSI report resources are the resources on the UL PCC. After the terminal device receives the activation command of SCell 1, the terminal device uses the first half of the persistent CSI-RS resources on the DL SCC of SCell 1 to measure CSI, and then the terminal device sends the CSI report through the first half of the persistent CSI report resources on the UL PCC of PCell.

[0172] In a possible example, in the above step 201, 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.

[0173] Among them, the MAC CE structure is as follows Figure 5A shown. Figure 5A The information field in the MAC CE includes Figure 4 The secondary cell indication field, semi-persistent CSI-RS resource group field, TCI status field of the resource group, and reserved field also include the semi-persistent CSI report configuration field. Figure 5A The secondary cell indication field, semi-persistent CSI-RS resource group field, resource group TCI status field and reserved field can refer to Figure 4 The description is not repeated here.

[0174] The Serving Cell ID indicates the PCell or SCell with the ServingCellIndex, which is an activated cell identifier that can be used to send CSI reports. For example, the Serving Cell ID may not be included, and the CSI report is sent by default through the cell where the current uplink PUCCH is located.

[0175] Sj refers to the semi-persistent CSI reporting configuration field of the cell indicated by the Serving Cell ID above, which indicates the activation / deactivation status of the semi-persistent CSI reporting configuration in the CSI-ReportConfigToAddModList (CSI reporting configuration to add mode list) of the PCell or SCell indicated by the Serving CellIndex as Serving Cell ID. S0 refers to the reporting configuration with the lowest CSI-ReportConfigId (CSI-reporting configuration ID) in the list for indicating the PUCCH resource of the SP CSI report in a specific BWP and having the type set to semiPersistentOnPUCCH (semi-persistent to PUCCH), and S1 refers to the reporting configuration with the second lowest CSI-ReportConfigId for indicating the PUCCH resource of the SP CSI report in the specific BWP. If the number of reporting configurations in the list with the type set to semiPersistentOnPUCCH in a specific BWP is less than j+1, the MAC entity will ignore the Sj field. The Sj field is set to 1 to indicate that the corresponding semi-persistent CSI reporting configuration will be activated. The Sj field is set to 0 to indicate that the corresponding semi-persistent CSI reporting configuration j will be deactivated.

[0176] CSI-RS resources are configured for a specific BWP on a specific cell, meaning that CSI-RS resources on a specific cell are associated with a BWP. CSI-RS resources indicated by a MAC CE or DCI are also associated with a specific downlink BWP. To clarify the BWP information associated with the CSI-RS resources, BWP index (BWP ID) information (not shown in the figure) can be included in the indication information. To simplify the indication information during cell activation, the BWP indication information can be simplified, namely, the CSI-RS is indicated by associating it with the default BWP. The default BWP associated with the CSI-RS is the default downlink BWP, which can be the BWP corresponding to the firstActiveDL BWP ID in the RRC configuration. It can also be the BWP corresponding to the minimum or maximum BWP ID among the default configured downlink BWP IDs. In this example, it can be understood that the CSI-RS resources in the indication information are CSI-RS resources associated with the default BWP. CSI report resources are configured for a specific BWP on a specific cell, meaning that CSI report resources on a specific cell are associated with a BWP. The CSI reporting resource indicated by MAC CE or DCI will also be associated with a specific uplink BWP. In order to clarify the BWP information associated with the CSI reporting resource, the BWP index (BWP ID) information can be included in the indication information. In order to simplify the indication information during the cell activation process, the indication information of the BWP can be simplified, that is, the association method of the CSI reporting resource and the default BWP is used for indication. The default BWP associated with the CSI reporting resource is the default uplink BWP, and the specific uplink BWP can be the uplink BWP indicated by the BWP ID in the MAC CE, or the BWP corresponding to the firstActive UL BWP ID in the RRC configuration. It can also be the BWP corresponding to the minimum or maximum BWP ID configured on the cell indicated by the Serving Cell ID. It can 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).

[0177] Based on the MAC CE structure, 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, and the semi-persistent CSI report configuration field is used to carry the third indication information.

[0178] Based on this implementation method, on the one hand, the network device can combine the first indication information, the second indication information, and the third indication information in a single MAC CE signaling, thereby simplifying the use of semi-persistent CSI-RS resources and semi-persistent CSI reporting resources during cell activation, thereby reducing SCell activation latency. On the other hand, this method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI reporting resources during SCell activation. Because the activation and deactivation states of semi-persistent CSI-RS resources and semi-persistent CSI reporting resources can be set through MAC CE signaling, this method can flexibly activate and deactivate secondary cells, thereby improving air interface resource utilization.

[0179] Implementation method three

[0180] In a possible example, in the above step 201, 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 the first indication information, the second indication information and the third indication information.

[0181] Example 1: The network device may use a newly designed DCI format to carry the first information, such as DCIfomat 3_x.

[0182] Example 2: The network device may reuse an existing DCI format to carry the first information, such as DCI format 1_0.

[0183] For Example 1 and Example 2, the first specific implementation method is: the network device can use the CRC encoded by the DCI format scrambled with the new RNTI to transmit the first information, which is briefly referred to as the new RNTI scrambled DCI. For example, the network device can include the first information in the DCI scrambled with the secondary cell activation RNTI (SCAct-RNTI) in the existing DCI format 1_0. In addition, the network device can also carry the first information by multiplexing the existing DCI format 1_1, DCI format 0_1, or DCI format0_0.

[0184] In a possible embodiment, it is also possible not to introduce a new SCAct-RNTI to scramble the DCI information, but to use an existing RNTI, such as C-RNTI, to scramble the DCI information.

[0185] A second specific implementation method: the network device may use the information field in the DCI structure to indicate that the DCI includes the first information.

[0186] Exemplarily, the verification field of the DCI information can be combined using the HARQ process number (HARQ process number) or redundancy version (RV), modulation and coding strategy (MCS), time domain resource assignment (TDRA), new data indicator (NDI), transmit power (Transmit Power Control) indication field (which can be TPC of PUSCH or TPC of PUCCH), frequency hopping (Frequency Hopping Flag) indication field and special values (all '0' or all '1') of one or more information fields in FDRA. In addition, the DCI information can also be verified by using a combination of other fields that do not include the FDRA field.

[0187] The third specific implementation method: the network device can use the first specific implementation method and the second specific implementation method in combination.

[0188] On the one hand, for the first specific implementation method, the network device can use the new RNTI-scrambled DCI encoding process as follows (its essence is that the CRC when the information in the DCI is encoded in a certain format uses the RNTI scrambling):

[0189] 1) The control information is organized into a control information block in a certain format (DCI format), or a control information sequence, such as a0, a1, a2, a3, ..., a A-1 .

[0190] 2) According to the control information blocks a0, a1, a2, a3, ..., a A-1 Generate CRC check information p0, p1, p2, p3, ..., p L-1 , add CRC check information to the control information block to generate information b0, b1, b2, b3, ..., b K-1 ,in:

[0191] b k =a k for k = 0, 1, 2, ..., A-1

[0192] b k =p k-A for k=A,A+1,A+2,...,A+L-1,

[0193] K=A+L.

[0194] 3) After appending, CRC check information is used with the corresponding RNTI (16bit) xrnti，0 , x rnti，1 ,...,x rnti，15 Scramble to generate information sequence c0, c1, c2, c3, ..., c K-1 , specifically, the following operations are performed:

[0195] c k =b k for k=0,1,2,...,A+7

[0196] c k =(b k +x rnti，k-A-8 )mod 2 for k=A+8, A+9, A+10,...,A+23.

[0197] 4) Channel coding and rate matching are then performed to complete the coding process of the control information.

[0198] On the other hand, for the second specific implementation method, the DCI structure is shown in Table 2. The secondary cell indication field, semi-persistent CSI-RS resource group field, resource group TCI status field and semi-persistent CSI report configuration field in Table 2 can refer to Figure 4 and Figure 5A The detailed description is omitted here.

[0199] The DCI structure is shown in Table 1. The DCI information fields in Table 1 include: secondary cell indication field, semi-persistent CSI-RS resource group field, TCI status field of resource group, and semi-persistent CSI report configuration field. The secondary cell indication field, semi-persistent CSI-RS resource group field, TCI status field of resource group, and semi-persistent CSI report configuration field in Table 1 can be referred to Figure 4 and Figure 5A The detailed description is omitted here.

[0200] Table 1

[0201]

[0202]

[0203] In Table 1, exemplarily, when FDRA is not all 1s, it is used to indicate frequency resources, and when FDRA is all '1s', it is used to indicate that the downlink control information is the first control information.

[0204] In a possible embodiment, considering that information bits in the DCI format are limited, the embodiment of the present application may simplify the content in the DCI that carries the first information in the following manner.

[0205] Method 1 can reduce the number of various ID indications of DCI overload.

[0206] For example, the existing DCI requires 6 bits to carry the CSI-RS resource indicated by any one of the 64 semi-persistent CSI-RS resource group IDs. In this embodiment, the DCI can only occupy 1 bit to carry the semi-persistent CSI-RS resource group corresponding to loweset1 to 2 IDs (the lowest 1 to 2 IDs). In other words, the DCI only includes the semi-persistent CSI-RS resource group corresponding to the minimum CSI-RS resource group ID on the secondary cell-specific downlink BWP indicated by the cell indication field and the semi-persistent CSI-RS resource group corresponding to the next smallest CSI-RS resource group ID on the secondary cell-specific downlink BWP indicated. Similarly, the TCI state ID corresponding to each CSI-RS resource group can also be simplified.

[0207] For another example, the existing DCI requires 4 bits to carry the CSI reporting resources corresponding to 4 CSI reporting resource IDs. In this embodiment, the DCI only occupies 1 bit to carry the CSI reporting resources corresponding to the lowest 1-2 CSI reporting resource IDs (the lowest 1-2 IDs). In other words, the DCI only includes the semi-persistent CSI reporting resources corresponding to the minimum CSI reporting resource ID on the secondary cell-specific downlink BWP indicated by the cell indication field and the CSI reporting resources corresponding to the last small CSI reporting resource ID of the indicated secondary cell-specific downlink BWP.

[0208] Method 2 uses the information corresponding to the default ID. For example, the existing DCI requires 6 bits to carry the CSI-RS resource indicated by any of the 64 semi-persistent CSI-RS resource group IDs. In this embodiment, the DCI does not carry information corresponding to the semi-persistent CSI-RS resource group field, the resource group TCI status field, and the semi-persistent CSI report configuration field. In other words, these information fields occupy 0 bits. Therefore, the DCI can only include information indicating the DCI format, frequency resource indication information, and the first indication information.

[0209] For example, Figure 5BAs shown in the figure, this figure shows the relationship diagram of the CSI-RS resource group, CSI_RS resource and the TCI state corresponding to the CSI-RS resource group. When 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 and TCI state 0 of the corresponding resources in CSI-RS resource group 1, use CSI-RS resource 2 and TCI state 0 of the corresponding resources in CSI-RS resource group 1, and use CSI-RS resource 3 and TCI state 0 of the corresponding resources in CSI-RS resource group 1 to measure CSI based on the default relationship. As Figure 5C As shown in FIG, the figure shows multiple CSI reporting resources. When the CSI reporting resource corresponding to the lowest CSI reporting resource ID is used by default, the terminal device can determine to use CSI reporting resource 1 for corresponding CSI reporting according to the default relationship.

[0210] Exemplarily, under this mode 2, the above step 202 is specifically as follows: after the terminal device receives the DCI, on the designated cell, by default, only the semi-persistent CSI-RS resources corresponding to the smallest BWP ID configured by RRC on the secondary cell-specific downlink BWP indicated by the cell indication field are used, or by default, only the semi-persistent CSI-RS resources corresponding to the smallest BWP ID configured by RRC and the second smallest BWP ID are used. The above step 203 is specifically as follows: after the terminal device receives the DCI, by default, only the semi-persistent CSI report resources corresponding to the smallest BWP ID configured by RRC are used, or by default, only the semi-persistent CSI report resources corresponding to the smallest BWP ID configured by RRC and the second smallest BWPID are used.

[0211] In one possible embodiment, in order not to increase the number of PDCCH blind detections of the terminal device, 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 the same as the total number of bits in the original DCI format used for data scheduling. That is, when DCI format 3_x is used to send the first information, the size of 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.

[0212] Based on implementation method three, on the first hand, the network device can combine the first indication information, the second indication information, and the third indication information in one DCI, thereby simplifying the use process of semi-persistent CSI-RS resources in the secondary cell activation process, thereby reducing the activation delay of the SCell. On the second hand, this method can support the use of semi-persistent CSI-RS resources and semi-persistent CSI report resources in the SCell activation process. Since the activation status and deactivation status of the semi-persistent CSI-RS resources and semi-persistent CSI report resources can be set through DCI, this method can realize flexible activation and deactivation of the secondary cell, thereby improving the utilization of air interface resources. On the third hand, since the transmission delay of DCI is less than the transmission delay of MAC CE signaling, this implementation method can more effectively reduce the activation delay of the secondary cell compared with implementation methods one and two.

[0213] In another possible embodiment, based on implementation method three and implementation method four, when the first information is carried in the DCI, the terminal device can also perform hybrid automatic repeat request (HARQ) feedback on the first information, that is, the terminal device sends HARQ to the network device, and HARQ is used to indicate whether the first information is received correctly, so as to improve the reliability of DCI information transmission.

[0214] like Figure 6 As shown, the present application also provides a process of a communication method, which is used to deactivate the secondary cell. The network device in the process may correspond to the above Figure 1A The network device 110 in the process shown in FIG. 1 and the terminal device 110 may correspond to the above Figure 1A The terminal device 120 in the process shown includes:

[0215] S601: The network device sends second information to the terminal device, where the second information is used to deactivate the first secondary cell.

[0216] The second information may be carried in control information, such as MAC CE signaling or DCI, which includes indication information indicating deactivation of the first secondary cell.

[0217] Step 602: The terminal device stops using the first half-persistent CSI-RS resources for CSI measurement.

[0218] Exemplarily, the terminal device may further perform the following first operation on the first secondary cell, where the first operation may include at least one of the following:

[0219] Do not monitor the PDCCH on the first secondary cell;

[0220] Do not monitor the PDCCH that schedules the first secondary cell;

[0221] Not transmitting the SRS on the first secondary cell;

[0222] Not transmitting uplink data on the first secondary cell;

[0223] Not transmitting the uplink control channel PUCCH on the first secondary cell;

[0224] Stopping a deactivation timer of the first secondary cell;

[0225] The HARQ buffer corresponding to the first secondary cell is cleared.

[0226] Through the above solution, 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.

[0227] Exemplarily, the control information further includes deactivation commands for other secondary cells. The deactivation process of other secondary cells is similar to the activation or deactivation process of the first secondary cell, and description thereof will not be repeated.

[0228] The above mainly introduces the solution provided by the present application from the perspective of the interaction between various network elements. It can be understood that in order to realize the above functions, the above-mentioned network elements include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0229] It is understandable that Figure 2 and Figure 6 The descriptions can be applied independently, in combination or by reference to each other.

[0230] Combination of the above Figure 2 and Figure 6 The communication method of the embodiment of the present application is described in detail. Figures 7 to 9 The communication device according to the embodiment of the present application is described in detail.

[0231] Figure 7 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device can be applied to Figure 1A In the system shown, the functions of the terminal device in the above method embodiment are executed. For the convenience of explanation, Figure 7 Only the main components of the terminal device are shown. Figure 7As shown, terminal device 120 includes a processor, memory, control circuitry, an antenna, and input / output devices. The processor is primarily used to process communication protocols and communication data, control the entire terminal device, execute software programs, and process data from software programs. For example, it supports the terminal device in performing the actions described in the above method embodiments, such as determining a precoding matrix based on the received PMI and RI, precoding the signal, and transmitting the precoded signal. The memory is primarily used to store software programs and data, such as the correspondence between the indication information and the combination information described in the above embodiments. The control circuitry is primarily used to convert baseband signals into RF signals and process RF signals. The control circuitry and antenna together can also be referred to as a transceiver, which is primarily used to transmit and receive RF signals in the form of electromagnetic waves. Input / output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0232] When the terminal device is powered on, the processor reads the software program stored in the storage unit, interprets and executes the program's instructions, and processes the program's data. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the RF circuit. The RF circuit then performs RF processing on the baseband signal and transmits it via the antenna as electromagnetic waves. When data is sent to the terminal device, the RF circuit receives the RF signal via the antenna, converts it into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes it.

[0233] Those skilled in the art will understand that for ease of explanation, Figure 7 Only one memory and one processor are shown. 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 embodiments of the present application.

[0234] As an optional implementation, 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, and the central processing unit is mainly used to control the entire terminal device, execute software programs, and process software program data. Figure 7The processor in the can integrate the functions of the baseband processor and the central processing unit. Those skilled in the art will understand that the baseband processor and the central processing unit can also be independent processors that are interconnected through technologies such as buses. Those skilled in the art will understand that the terminal device can include multiple baseband processors to adapt to different network standards, and the terminal device can include multiple central processing units to enhance its processing capabilities. The various components of the terminal device can 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 communication protocols and communication data can be built into the processor, or it can be stored in a storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0235] In the embodiment of the present application, the antenna and the control circuit with transceiver functions can be regarded as the transceiver unit 701 of the terminal device 120, for example, for supporting the terminal device to perform the following Figure 2 The receiving function and sending function described in the previous section. The processor with processing function is regarded as the processing unit 702 of the terminal device 120. Figure 7 As shown, 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 device, etc. Optionally, the device in the transceiver unit 701 that implements the receiving function may be considered a receiving unit, and the device in the transceiver unit 701 that implements the transmitting function may be considered a transmitting unit. That is, the transceiver unit 701 includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0236] The processing unit 702 may be configured to execute instructions stored in the memory to control the transceiver unit 701 to receive and / or transmit signals, thereby completing the functions of the terminal device in the above-described method embodiment. As an implementation method, the functions of the transceiver unit 701 may be implemented using a transceiver circuit or a dedicated transceiver chip.

[0237] Figure 8 This is a schematic diagram of the structure of a network device provided in an embodiment of the present application, such as a schematic diagram of the structure of a base station. Figure 8 As shown, the base station can be applied to Figure 1AIn the system shown, the functions of the network device in the above-mentioned method embodiment are performed. 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 referred to as digital units, DU) 802. The RRU 801 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 8011 and a radio frequency unit 8012. The RRU 801 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals, for example, for sending the signaling messages described in the above-mentioned embodiment to the terminal device. The BBU 802 part is mainly used for baseband processing, controlling the base station, etc. The RRU 801 and BBU 802 may be physically arranged together or physically separated, that is, a distributed base station.

[0238] The BBU 802 is the control center of the base station, which can also be called a processing unit. It is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU (processing unit) 802 can be used to control the base station to execute the operation process of the network device in the above method embodiment.

[0239] In one example, the BBU 802 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network with a single access indication (such as an LTE network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The BBU 802 also includes a memory 8021 and a processor 8022, and the memory 8021 is used to store necessary instructions and data. For example, the memory 8021 stores the correspondence between the codebook index and the precoding matrix in the above embodiment. The processor 8022 is used to control the base station to perform necessary actions, such as controlling the base station to execute the operation process of the network device in the above method embodiment. The memory 8021 and the processor 8022 may serve one or more boards. That is, a memory and a processor may be separately set on each board. Alternatively, multiple boards may share the same memory and processor. In addition, necessary circuits may be provided on each board.

[0240] Figure 9 A schematic diagram of the structure of a communication device 900 is provided. The device 900 can be used to implement the method described in the above method embodiment, and the description of the above method embodiment can be referred to. The communication device 900 can be a chip, a network device (such as a base station), a terminal device, or other network device.

[0241] The communication device 900 includes one or more processors 901. The processor 901 can be a general-purpose processor or a dedicated 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, and the central processing unit can be used to control the communication device (such as a base station, terminal, or chip, etc.), execute software programs, and process data of the software programs. The communication device may include a transceiver unit to realize signal input (reception) and output (transmission). For example, the communication device can be a chip, and the transceiver unit can be the input and / or output circuit of the chip, or a communication interface. The chip can be used in a terminal or base station or other network device. For another example, the communication device can be a terminal or base station or other network device, and the transceiver unit can be a transceiver, a radio frequency chip, etc.

[0242] The communication device 900 includes one or more processors 901, and the one or more processors 901 can implement Figure 2 The method of the network device or terminal device in the embodiment shown.

[0243] In one possible design, the communication device 900 includes a means for generating first indication information and a 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 can be implemented by one or more processors. For example, the first indication information can be generated by one or more processors and sent through a transceiver, an input / output circuit, or an interface of a chip. The first indication information can refer to the relevant description in the above method embodiment.

[0244] In one possible design, the communication device 900 includes a means for receiving first indication information and a means for determining a second parameter. The first indication information and how the second parameter is determined can be described in detail in the above method embodiments. For example, the first indication information can be received via a transceiver, an input / output circuit, or an interface of a chip, and the second parameter can be determined via one or more processors.

[0245] Optionally, the processor 901 implements Figure 2 The method of the embodiment shown can also realize other functions.

[0246] Optionally, in one design, the processor 901 may also include instructions 903, which may be executed on the processor to enable the communication device 900 to perform the method described in the above method embodiment.

[0247] In another possible design, the communication device 900 may also include a circuit, which can implement the functions of the network device or terminal device in the aforementioned method embodiment.

[0248] In another possible design, the communication device 900 may include one or more memories 902, on which instructions 904 are stored. The instructions can be executed on the processor, so that the communication device 900 performs the method described in the above method embodiment. Optionally, data can also be stored in the memory. The optional processor can also store instructions and / or data. For example, the one or more memories 902 can store the corresponding relationships described in the above embodiments, or the relevant parameters or tables involved in the above embodiments. The processor and memory can be provided separately or integrated together.

[0249] In another possible design, the communication device 900 may further include a transceiver unit 905 and an antenna 906. The processor 901 may be referred to as a processing unit, which controls the communication device (terminal or base station). The transceiver unit 905 may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and is configured to implement the transceiver functions of the communication device through the antenna 906.

[0250] The present application also provides a communication system, which includes one or more network devices mentioned above, and one or more terminal devices.

[0251] It should be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0252] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0253] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0254] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0255] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0256] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0257] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0258] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0259] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0260] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0261] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: The terminal device receives first information, where the first information is used to activate the first secondary cell, and the first information is carried in downlink control information DCI; During activation of the first secondary cell, the terminal device uses a first semi-persistent channel state information reference signal CSI-RS resource to perform channel state information CSI measurement; The method further comprises: The terminal device determines the first semi-persistent CSI-RS resource corresponding to the default index.

2. The method according to claim 1, characterized in that The DCI format of the DCI is DCI format1-0, and the DCI further includes an information field with a set value, where the information field with the set value is used to indicate that the DCI is used to activate the first secondary cell; The total number of bits of the DCI used to activate the first secondary cell is the same as the total number of bits of the DCI used for downlink data scheduling and in DCI format 1-0.

3. The method according to claim 1, characterized in that Also includes: The terminal device sends hybrid automatic repeat request HARQ information, where the HARQ information is used to indicate whether the first information is received correctly.

4. The method according to any one of claims 1 to 3, characterized in that Also includes: The terminal device receives second information, where 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.

5. A communication method, characterized in that: include: The network device sends first information, where the first information is used to activate the first secondary cell, and the first information is carried in downlink control information DCI; The network device receives a channel state information (CSI) report, where the CSI report is obtained by the terminal device performing CSI measurement using a first semi-persistent CSI-RS resource during activation of the first secondary cell; The first semi-persistent CSI-RS resource is a semi-persistent CSI-RS resource corresponding to a default index.

6. The method according to claim 5, characterized in that The DCI format of the DCI is DCI format1-0, and the DCI further includes an information field with a set value, where the information field with the set value is used to indicate that the DCI is used to activate the first secondary cell; The total number of bits of the DCI used to activate the first secondary cell is the same as the total number of bits of the DCI used for downlink data scheduling and in DCI format 1-0.

7. The method according to claim 5, characterized in that Also includes: The network device receives hybrid automatic repeat request HARQ information, where the HARQ information is used to indicate whether the first information is correctly received.

8. The method according to any one of claims 5 to 7, characterized in that Also includes: The network device sends second information, where the second information is used to deactivate the first secondary cell.

9. A device, characterized in that: include: A processor and an interface circuit, wherein the processor is configured to communicate with a network device via the interface circuit and execute the method according to any one of claims 1 to 4.

10. A device, characterized in that: include: A processor and an interface circuit, wherein the processor is used to communicate with a terminal device through the interface circuit and execute the method according to any one of claims 5 to 8.

11. A device, characterized in that: The system comprises a processor connected to a memory and configured to call a program stored in the memory to execute the method according to any one of claims 1 to 4.

12. A device, characterized in that: The system comprises a processor connected to a memory and configured to call a program stored in the memory to execute the method according to any one of claims 5 to 8.

13. A device, characterized in that: The invention comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the terminal device executes any one of the methods described in claims 1-4.

14. A device, characterized in that It comprises a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the terminal device executes any one of the methods described in claims 5-8.

15. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the processor performs the method according to any one of claims 1 to 4.

16. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the processor performs the method according to any one of claims 5 to 8.

17. A communication system, characterized in that: The invention comprises an apparatus for executing the method according to any one of claims 1 to 4 and an apparatus for executing the method according to any one of claims 5 to 8.

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