WO2019174013A1

WO2019174013A1 - Communication method, communication apparatus, and system

Info

Publication number: WO2019174013A1
Application number: PCT/CN2018/079198
Authority: WO
Inventors: 李铮; 吴毅凌; 夏沈杰
Original assignee: 华为技术有限公司
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2019-09-19
Also published as: CN111869269B; CN111869269A

Abstract

Provided are a communication method, a communication apparatus, and a system. The method comprises: a terminal device receiving first indication information, wherein the first indication information is used for indicating a first indexing mode from among at least two indexing modes, the first indexing mode is an indexing mode of a first carrier, the first carrier is a carrier used for communication between the terminal device and a network device, and the at least two indexing modes comprise a logical carrier indexing mode and an absolute physical carrier indexing mode; the terminal device receiving second indication information, wherein the second indication information is used for indicating the indexing of the first carrier, and the indexing mode of the first carrier is the first indexing mode; and the terminal device determining the first carrier according to the first indication information and the second indication information, and communicating with the network device by means of the first carrier. By means of the method, the carrier indication complexity can be reduced, a more flexible system configuration is realized, and the frequency spectrum usage efficiency is improved.

Description

Communication method, communication device and system

Technical field

The present application relates to the field of communications, and more particularly to a communication method, communication device and system for indicating a carrier.

Background technique

At present, the bandwidth of one carrier in a mobile communication network is 20 MHz/10 MHz/5 MHz, and the bandwidth of one carrier in a narrowband system is usually less than 1 MHz, for example, the Narrow Band Internet of Things (NB-IoT) technology is 180 kHz. . In the 230Mhz band, according to the spectrum regulations, the narrowband carrier bandwidth is only 25kHz, and the number of carriers available in different industries is not the same. In the 230 MHz band, one of the presentation characteristics of the spectrum is fragmented. It is embodied in the spectrum of the same industry, multi-industry in this frequency band, etc., for example, including power, water conservancy, mining, military and other industries, the frequency points involved in the above industries are staggered and interlaced, so the entire frequency band system is presented. Rules, comb structure.

In terms of resource partitioning, the narrowband system is not applicable to the current Long Term Evolution (LTE) technology, and the concept of carrier and time-frequency resources cannot be inherited. As a result, the complexity of resource partitioning increases, and it is not possible to clearly and flexibly allocate specific resources on the carrier to users. Secondly, there are some unlicensed frequency points in the 230MHz frequency band. For example, a certain frequency point is not allocated to any industry, and a flexible resource indication method is needed to improve spectrum utilization.

Summary of the invention

The present application provides a communication method, a communication device, and a system for indicating a carrier, which can reduce carrier indication complexity, implement more flexible system configuration, and improve spectrum use efficiency.

In a first aspect, a communication method is provided, comprising:

Receiving, by the terminal device, the first indication information that is sent by the network device, where the first indication information is used to indicate a first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier, where the first The carrier is a carrier used for communication between the terminal device and the network device, and the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode.

The terminal device receives the second indication information that is sent by the network device, where the second indication information is used to indicate an index of the first carrier, where the index mode of the first carrier is the first index mode;

The terminal device determines the first carrier according to the first indication information and the second indication information, and communicates with the network device by using the first carrier.

Based on the foregoing technical solution, in the narrowband system, the terminal device may determine, according to the first indication information, that the current transmission uses an absolute physical carrier index or a carrier indicated by a logical carrier index, so that according to different index modes, according to the index value and the system message. The mapping relationship between the two determines the carrier that can be used for communication and communicates. For the 25 kHz carrier of the narrowband system, the above indication manner can effectively reduce the indication complexity and realize more flexible indication carrier resources.

With reference to the first aspect, in some implementations of the first aspect, the terminal device determines the first carrier according to the first indication information and the second indication information, including:

When the terminal device determines that the first index mode is an absolute physical carrier index mode according to the first indication information, the second indication information is an index of the first carrier;

The terminal device determines a first carrier according to an index of the first carrier, and communicates with the network device by using the first carrier.

Optionally, in the narrowband system, when the terminal device can determine, according to the first indication information, that the current transmission uses an absolute physical carrier index, the second indication information may be an index of the absolute physical carrier, according to the index value and A mapping relationship between system messages to determine which carriers are available for communication for communication. Such an indication manner can effectively reduce the complexity of the indication and implement a more flexible indicator carrier resource.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, before the terminal device receives the first indication information sent by the network device, the method further includes:

The terminal device receives a first message sent by the network device, where the first message is used to determine the logical carrier index.

Before the terminal device communicates with the network device, determining, by using the received first message, which carrier in the system bandwidth or which carrier in the absolute physical carrier is a valid carrier, and identifying the rearranged to obtain a logical carrier, thereby obtaining an index value of the logical carrier, It is convenient to use the logical index mode to indicate the available carrier resources in use.

With reference to the first aspect and the foregoing implementation manner, in some possible implementations, the terminal device determines the first carrier according to the first indication information and the second indication information, including:

When the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device determines an index of the first carrier according to the second indication information and the first message, where the first carrier The index corresponds to the first carrier;

The terminal device determines the first carrier according to the index of the first carrier, and communicates with the network device by using the first carrier.

Optionally, in the narrowband system, when the terminal device can determine, according to the first indication information, that the current transmission uses a logical carrier index, an index value may be obtained by combining the second indication information with the first message, according to the index value and A mapping relationship between system messages to determine which carriers are available for communication for communication. Such an indication manner can effectively reduce the complexity of the indication and implement a more flexible indicator carrier resource.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the first message is a broadcast message.

Optionally, the terminal device may identify the valid carrier by using a broadcast message sent by the network device. By broadcasting the content of the message, the terminal device in the communication system can recognize the valid carrier and rearrange it to obtain a logical carrier index. The carrier and the logical carrier index indicated in the broadcast message have a one-to-one mapping relationship. Therefore, the terminal device can specifically indicate a carrier that can be used for communication according to the carrier index and the broadcast message, which can effectively reduce the complexity of the indication and achieve more Flexible indication of carrier resources.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the first message further includes frequency hopping indication information, and the terminal device determines, according to the frequency hopping indication information, whether the current transmission is a frequency hopping transmission.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, when the current transmission is a frequency hopping transmission, the terminal device determines the first carrier according to the first indication information and the second indication information, including :

When the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device determines an index of the effective physical carrier according to the second indication information and a preset frequency hopping formula;

The terminal device determines an index of the first carrier according to the first message and an index of the valid physical carrier, where the index of the first carrier corresponds to the first carrier;

The terminal device first needs to determine whether the current system is enabled for frequency hopping according to the frequency hopping switch in the broadcast message. If the frequency hopping switch is enabled for frequency hopping, the logical carrier index is used to participate in the frequency hopping formula, and the index of the effective physical carrier after the frequency hopping is obtained, that is, the first carrier index, and then the mapping relationship between the carrier index and the system message is used to determine the actual Carrier channel received or transmitted.

As an embodiment, when the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device is configured according to the second indication information. And determining, by using a preset frequency hopping formula, an index of the first carrier, where the index of the first carrier corresponds to the first carrier; the terminal device determines the first carrier according to an index of the first carrier, and passes the first A carrier communicates with the network device.

Optionally, if the frequency hopping is not used, the mapping relationship between the logical carrier index and the broadcast message is directly used to determine the carrier channel of the actual communication, and the data is received or transmitted.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the first indication information is indication information of at least 1 bit included in the downlink control information.

Optionally, the downlink control information includes a first type of control information format 1 that represents downlink resource scheduling and a second type of control information format 0 that represents uplink resource scheduling.

In a second aspect, a communication method is provided, including:

The network device sends the first indication information to the terminal device, where the first indication information is used to indicate the first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier, where the first carrier The carrier used for communication between the network device and the terminal device, where the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode;

The network device sends the second indication information to the terminal device, where the second indication information is used to indicate the index of the first carrier, where the index of the first carrier is the first index mode;

The network device determines the first carrier by using the first indication information and the second indication information, and communicates with the terminal device by using the first carrier.

Based on the foregoing technical solution, in the narrowband system, the network device may learn, according to the first indication information, that the current transmission uses an absolute physical carrier index or a carrier indicated by a logical carrier index, so that according to different index manners, according to the index value and the system message. The mapping relationship between the two determines the carrier that can be used for communication. For the 25 kHz carrier of the narrowband system, the above indication manner can effectively reduce the indication complexity and realize more flexible indication carrier resources.

With reference to the second aspect, in some implementations of the second aspect, the network device determines the first carrier by using the first indication information and the second indication information, including:

When the network device determines, according to the first indication information, that the first index mode is an absolute physical carrier index mode, the second indication information is an index of the first carrier;

The network device determines a first carrier according to an index of the first carrier, and communicates with the terminal device by using the first carrier.

Optionally, the network device may determine, according to the first indication information, that the current transmission uses an absolute physical carrier index, then the second indication information may be an index of the absolute physical carrier, according to the mapping between the index value and the system message. Relationship, determining the carrier that can be used for communication for communication. Such an indication manner can effectively reduce the complexity of the indication and achieve more flexible indication carrier resources.

With reference to the second aspect and the foregoing implementation manner, in some possible implementations, before the network device sends the first indication information to the terminal device, the method further includes:

The network device sends a first message to the terminal device, where the first message is used to determine the logical carrier index.

Before the network device communicates with the terminal device, determining, by using the received first message, which carrier in the system bandwidth or which carrier in the absolute physical carrier is a valid carrier, and identifying the rearranged to obtain a logical carrier, thereby obtaining an index value of the logical carrier, It is convenient to use the logical index mode to indicate the available carrier resources in use.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the network device determines the first carrier by using the first indication information and the second indication information, including:

When the network device determines, according to the first indication information, that the first index mode is the logical carrier index mode, the network device determines an index of the first carrier according to the second indication information and the first message, where the first carrier is The index corresponds to the first carrier;

The network device determines the first carrier according to an index of the first carrier, and communicates with the terminal device by using the first carrier.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the first message is a broadcast message.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the first message further includes frequency hopping indication information, and the network device determines, according to the frequency hopping indication information, whether the current transmission is a frequency hopping transmission.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, when the current transmission is a frequency hopping transmission, the network device determines the first carrier by using the first indication information and the second indication information, including :

When the network device determines, according to the first indication information, that the first index mode is the logical carrier index mode, the network device determines an index of the effective physical carrier according to the second indication information and a preset hopping formula;

Determining, by the network device, an index of the first carrier according to the first message and an index of the valid physical carrier, where an index of the first carrier corresponds to a first carrier;

The network device first sends a broadcast message to the terminal device, and the broadcast message includes a frequency hopping switch to determine whether the current system enables frequency hopping. If the frequency hopping switch enables frequency hopping, the logical carrier index is used to participate in the frequency hopping formula, and the index of the effective physical carrier is obtained, that is, the first carrier index, and then the mapping relationship between the carrier index and the system message is used to determine the actual receiving or sending. Carrier channel.

As an implementation manner, when the first indexing mode indicated by the first indication information is the logical carrier indexing mode, the terminal device is configured according to the second indication information and a preset hopping. The frequency formula determines an index of the first carrier, where the index of the first carrier corresponds to the first carrier; the terminal device determines the first carrier according to an index of the first carrier, and passes the first carrier and the Network device communication.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the first indication information is indication information of at least 1 bit included in the downlink control information.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the downlink control information includes a first type of control information format 1 that represents a downlink resource scheduling, and a second type of control information format 0 that represents an uplink resource scheduling.

In a third aspect, a terminal device is provided, the terminal device having the function of implementing the terminal device in the method design of the above first aspect. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a fourth aspect, a network device is provided, the network device having the function of implementing the network device in the method design of the second aspect above. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In a fifth aspect, a terminal device is provided, including a transceiver, a processor, and a memory. The processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the terminal device performs any of the above first aspect and the first aspect A method in any of the possible implementations of the implementation.

In a sixth aspect, a network device is provided, including a transceiver, a processor, and a memory. The processor is configured to control a transceiver transceiver signal for storing a computer program for calling and running the computer program from the memory, such that the network device performs any of the second aspect and the second aspect described above. A method in any of the possible implementations of the implementation.

In a seventh aspect, a communication device is provided, which may be a terminal device in the above method design, or a chip disposed in the terminal device. The communication device includes a processor coupled to the memory for executing instructions in the memory to implement the method of the first aspect and any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further includes a communication interface, the processor being coupled to the communication interface.

In an eighth aspect, a communication device is provided, which may be a network device in the above method design or a chip disposed in a network device. The communication device includes a processor coupled to the memory for executing instructions in the memory to implement the method performed by the network device in any of the possible implementations of the second aspect and the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further includes a communication interface, the processor being coupled to the communication interface.

In a ninth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the method of the above aspects.

According to a tenth aspect, a computer readable medium storing program code for causing a computer to perform the method of the above aspects when the computer program code is run on a computer.

In an eleventh aspect, a chip system is provided, the chip system comprising a processor for supporting a terminal device to implement the functions involved in the above aspects, for example, generating, receiving, determining, transmitting, or processing the method involved in the above method Data and / or information. In a possible design, the chip system further comprises a memory for storing necessary program instructions and data of the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a twelfth aspect, a chip system is provided, the chip system comprising a processor for supporting a network device to implement the functions involved in the above aspects, for example, generating, receiving, determining, transmitting, or processing the method involved in the above method Data and / or information. In a possible design, the chip system further comprises a memory for storing necessary program instructions and data of the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

DRAWINGS

FIG. 1 is a schematic diagram of a wireless communication system provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of frequency division of various industries in a narrowband system according to an embodiment of the present application.

FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of an example of a carrier provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of still another carrier provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of still another carrier provided by an embodiment of the present application.

FIG. 7 is a schematic block diagram of an example of a communication apparatus according to an embodiment of the present application.

FIG. 8 is a schematic block diagram of still another example of a communication apparatus according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of an example of a terminal device according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of still another example of a terminal device according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of an example of a network device according to an embodiment of the present application.

FIG. 12 is a schematic structural diagram of still another example of a network device according to an embodiment of the present application.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The terms "component," "module," "system," and the like, as used in this specification, are used to mean a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside within a process and/or execution thread, and the components can be located on one computer and/or distributed between two or more computers. Moreover, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on signals having one or more data packets (eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems) Communicate through local and/or remote processes.

It should be understood that the manners, the conditions, the categories, and the divisions of the embodiments in the embodiments of the present application are only for convenience of description, and should not be specifically limited. The various modes, categories, situations, and features in the embodiments are not contradictory. In case you can combine them.

It should also be understood that the terms "first", "second", and "third" in the application examples are merely a distinction and should not be construed as limiting.

It should also be understood that, in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiment of the present application. The implementation process constitutes any limitation.

It should be noted that, in the implementation of the present application, the “protocol” may refer to a standard protocol in the communication field, and may include, for example, the LTE protocol, the NR protocol, and related protocols used in a future communication system, which is not limited in this application.

It should be noted that, in the embodiment of the present application, “pre-defined”, “preset”, and the like may be used to indicate related information by pre-storing corresponding codes, tables, or other in devices (including, for example, terminal devices and network devices). The manner of information is implemented, and the specific implementation manner of the present application is not limited. For example, pre-definition can be defined in the protocol.

It should also be noted that in the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning thereof. Information, signals, messages, and channels can sometimes be mixed. It should be noted that the meanings to be expressed are consistent when the distinction is not emphasized. "of", "corresponding (relevant)" and "corresponding" can sometimes be mixed. It should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.

It should also be noted that “and/or” describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, A and B exist simultaneously, and B exists separately. These three situations. The character "/" generally indicates that the contextual object is an "or" relationship. "At least one" means one or more; "at least one of A and B", similar to "A and/or B", describing the association of associated objects, indicating that there may be three relationships, for example, A and B. At least one of them may indicate that A exists separately, and A and B exist simultaneously, and B cases exist separately. The technical solutions provided by the present application will be described in detail below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division multiple access. (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, and the future fifth generation (5th Generation, 5G) system or new radio (New Radio, NR) and so on.

1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application. In order to facilitate the understanding of the embodiments of the present application, the communication system 100 shown in FIG. 1 is taken as an example to describe the communication system applicable to the embodiment of the present application. As shown in FIG. 1, the wireless communication system 100 can include one or more access network devices, such as the access network device 110 shown in FIG. 1; the wireless communication system 100 can also include one or more terminal devices. For example, the terminal device 120 shown in FIG. 1; the wireless communication system 100 may further include a core network device, such as the core network device 130 shown in FIG. 1. The wireless communication system 100 can support Coordinated Multiple Points Transmission (CoMP), that is, multiple cells or multiple network devices can cooperatively participate in data transmission of one terminal device or jointly receive data transmitted by one terminal device, or Multiple cells or multiple network devices perform cooperative scheduling or cooperative beamforming. The multiple cells may belong to the same network device or different network devices, and may be selected according to channel gain or path loss, received signal strength, received signal instructions, and the like.

The access network device 110 may be a device for communicating with the mobile device. It should be understood that the access network device 110 may be any device having a wireless transceiving function or a chip that can be disposed on the device, including but not It is limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), and base transceiver station ( Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Baseband Unit (BBU), Access Point in Wireless Fidelity (WIFI) System (Access) Point, AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., can also be 5G, such as NR, gNB in the system Or, a transmission point (TRP or TP), one or a group of base stations (including multiple antenna panels) in the 5G system, or, alternatively, a network node constituting a gNB or a transmission point, A baseband unit (the BBU), or a distributed unit (distributed unit, DU) and the like.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU implements radio resource control (RRC), the function of the packet data convergence protocol (PDCP) layer, and the DU implements the wireless chain. The functions of the radio link control (RLC), the media access control (MAC), and the physical (PHY) layer. Since the information of the RRC layer eventually becomes information of the PHY layer or is transformed by the information of the PHY layer, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be used in this architecture. It is considered to be sent by the DU or sent by the DU+RU. It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, and the CU may be divided into network devices in the core network (Core Network, CN), which is not limited herein.

In addition, in the embodiment of the present application, the access network device provides a service for the cell, and the terminal device communicates with the access network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, where the cell It may be a cell corresponding to an access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell, where the small cell may include: a metro cell and a micro cell ( Micro cell), Pico cell, Femto cell, 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, multiple carriers can work at the same frequency on the carrier in the LTE system or the 5G system. In some special scenarios, the concept of the carrier and the cell can be considered to be equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identifier (Cell ID) of the secondary cell working in the secondary carrier are simultaneously carried. In this case, the concept of the carrier and the cell can be considered to be equivalent, for example, the UE accessing one carrier and accessing one cell are equivalent.

The core network device 130 can be connected to a plurality of access network devices for controlling the access network devices, and can distribute data received from the network side (for example, the Internet) to the access network devices.

In the embodiment of the present application, the network device may include the access network device 110 or the core network device 130. The embodiment of the present application mainly relates to communication and interaction between the terminal device and the network device. For convenience of description, the access network device is thereafter And core network devices are collectively referred to as network devices.

It should be understood that the terminal device 120 in the wireless communication system may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, User terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal. Equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( A wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The embodiment of the present application does not limit the application scenario. In the present application, the foregoing terminal device and a chip that can be disposed in the foregoing terminal device are collectively referred to as a terminal device.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system, and the IoT is an important component of future information technology development, and its main technical feature is to pass the article through the communication technology. Connected to the network to realize an intelligent network of human-machine interconnection and physical interconnection.

It should be understood that the network device and the terminal device are schematically illustrated in FIG. 1 for convenience of understanding, but this should not constitute any limitation to the present application, and a more or less number of network devices may be included in the wireless communication system. A network device that can communicate with different terminal devices may be the same network device or a different network device, and the number of network devices that communicate with different terminal devices may be the same. The present application is not limited thereto.

In addition, the communication system 100 may be a PLMN network, a D2D network, an M2M network, an IoT network, an NB-IoT network, or other networks. FIG. 1 is only a simplified schematic diagram of the example, and the network may also include other access network devices, FIG. Not drawn.

In order to facilitate the understanding of the embodiments of the present application, several terms or terms related to the present application are briefly introduced below.

1, frequency band

The unit of the frequency band is Hertz (Hz), which is the portion of the radio spectrum that lies between two specific frequency limits. For a signal, the frequency band is the frequency range between the highest frequency and the lowest frequency that the signal contains (of course, the frequency component must be greater than a certain value). For a channel, the frequency band is the frequency range between the highest frequency of the signal that is allowed to be transmitted and the lowest frequency of the signal that is allowed to be transmitted (of course, the attenuation must be within a certain range).

In layman's terms, for a channel, the frequency band is the frequency range between the highest frequency of the signal that is allowed to be transmitted and the lowest frequency of the signal that is allowed to be transmitted (of course, the attenuation must be within a certain range). If the two are very different, it can be considered that the frequency band is equal to the highest frequency of the signal that is allowed to be transmitted.

For a signal, the frequency band is the frequency range between the highest frequency and the lowest frequency that the signal contains (of course, the frequency component must be greater than a certain value). If the two are very different, it can be roughly assumed that the frequency band is equal to the highest frequency of the signal.

2, the bandwidth

Referred to as “bandwidth”, sometimes called the necessary bandwidth, it is the difference between the highest frequency and the lowest frequency of the signal when the analog signal is transmitted. The unit is Hertz (Hz), which is the bandwidth required to ensure the rate and quality of certain transmitted information. Allowable value.

Effective Bandwidth: The range of frequencies that a signal has is called the bandwidth of the signal. Most of the energy of the signal is often contained in a narrow frequency band, which is the effective bandwidth.

3, narrowband system

In a communication system, after the source signal is modulated by the carrier signal, the signal whose effective bandwidth is much smaller than the carrier frequency or center frequency of the source signal is called a narrowband signal. In actual communication, the frequency band resources allocated to the user equipment + the real propagation environment, which we call the channel, also have certain spectral characteristics. In general, the wider the allocated band resources and the more stable the propagation environment, the higher the data rate that the channel can carry.

From the spectrum of the signal waveform, the signal bandwidth (or "source feature") is Δf, the carrier frequency (or "channel characteristic") is fc, and the system is called a narrowband system when Δf is much smaller than fc. . It can be seen that the "narrowband channel" and the "narrowband signal" are all within the same definition, which is a "narrowband system", and the two complement each other.

2 is a schematic diagram of frequency division of various industries in a narrowband system. Generally, in a mobile communication network, the network bandwidth is 20MHz/10MHz/5MHz, and the license is licensed to the spectrum of various industries, and the system bandwidth is much smaller than that of the mobile communication network, and the typical bandwidth of the license industry is only tens of 25 kHz channels. . For example, in the 230MHz frequency band, the frequency band is distributed to power, construction, light industry, earthquake, military and other industries. The spectrum distribution is fragmented. The frequency distributions available in various industries are spurred and interlaced, resulting in the entire frequency band system. Presents a random, comb-like structure. As shown in Figure 2, the different filled graphs show the available frequency points assigned to the corresponding industry. It can be seen that the frequency points of various industries are scattered and there are no rules.

Specifically, if only a few dozen or hundreds of 25 kHz channels are allocated for data transmission in an industry, and the entire available frequency points are dispersed, there is insufficient carrier resources and/or time-frequency resources on the one hand. For the transmission of current data, on the other hand, for these scattered carrier resources and/or time-frequency resources, accurate and flexible indications cannot be realized, and thus various types of services cannot be satisfied.

Taking the communication between the eNB and the UE in the LTE system as an example, when the UE needs to perform data transmission, the UE sends a scheduling request (SR) to the eNB first. After receiving the SR, the eNB responds to the scheduling request of the UE and agrees to perform the scheduling request. Data transmission, and then downlink control information (DCI) is generated according to the available resources of the current data transmission and the amount of data to be transmitted reported by the terminal device, and the downlink control information is downlink control information sent by the eNB to the UE, and is downlinked. Physical Downlink Control Channel (PDCCH) bearer, including uplink and downlink resource allocation, HARQ information, power control, and the like. The UE receives the downlink control information sent by the eNB, and performs data transmission according to the resource indicated by the downlink control information.

In addition, for different service types in the same industry, the requirements for delay or available resource capacity are different. For different industries, the requirements of data transmission process delay or available resource capacity are also different. In addition, for industries such as power, construction, light industry, earthquake, military, etc., because it is a narrowband system, and can not directly multiplex LTE technology, first in the resource division, the concept of carrier and resource block (RB) It is not completely applicable. Secondly, there are some unlicensed frequency points in the 230MHz frequency band. For example, a frequency point is not allocated to any industry. Such a frequency point is an unlicensed frequency point. For example, in the system on the 230Mhz band, since the channel is narrow and the number of frequency domain resources is small, one RB in LTE is 180 kHz, there are 12 subcarriers, each subcarrier is 15 kHz, and in 230 Mhz system, each channel is 25 kHz, therefore, The manner in which the existing downlink control information indicates the RBs available for data transmission cannot be used in the narrowband system. Therefore, for the narrowband system, there is no flexible system indicating the available resources, thereby achieving reasonable and efficient utilization of resources.

The embodiment of the present application provides a carrier indication method applied to a narrowband system and a downlink control channel, and implements a flexible resource indication method. On the one hand, the complexity of resource indication is reduced, and on the other hand, the efficiency of using spectrum resources is improved, thereby increasing the capacity of the system.

It should be understood that "resources" are referred to multiple times in this application, and may refer to time-frequency resources, carriers and/or sub-carriers, carrier channels, and the like for data transmission. In the narrowband system of the embodiment of the present application, the carrier and the channel have the equivalent meaning, and one carrier refers to one channel of 25 kHz. Therefore, in the description, the granularity of the frequency domain resource scheduling in the system can be described as one. And/or a set of carriers, one and/or a set of channels, one and/or a set of carrier channels or one and/or a set of narrowband channels, it being understood that embodiments of the present application are not limited thereto.

FIG. 3 is a schematic flowchart of a communication method 300 provided by an embodiment of the present application, which is shown from the perspective of device interaction. As shown, the method 300 shown in FIG. 3 can include steps 310 through 340. The method 300 is described in detail below in conjunction with FIGS. 3 through 6.

In step 310, the network device sends the first indication information to the terminal device, where the terminal device receives the first indication information that is sent by the network device, where the first indication information is used to indicate the first index mode of the at least two index modes. The first index mode is an index mode of the first carrier, where the first carrier is a carrier used for communication between the terminal device and the network device, and the at least two index modes include a logical carrier index mode and Absolute physical carrier indexing.

For the logical carrier and the absolute carrier in the embodiment of the present application, the following is a detailed description of FIG. 4 to FIG. 6 .

4 to 6 are schematic diagrams of carriers provided by an embodiment of the present application. Specifically, as shown in the carrier diagram shown in FIG. 4, in a narrowband system, the system bandwidth is 12 MHz, and a total of 480 subbands are included, which is what we call a carrier or channel, each carrier is 25 kHz, among the 480 carriers. Some carriers cannot be used, and the invalid carrier needs to be deducted. For example, some carriers in FIG. 4 are dedicated carriers, such as a physical broadcast channel (PBCH) dedicated to transmitting broadcast messages, a Physical Synchronisation Channel (PSCH), and the like. The dedicated carriers of these parts as described above are unavailable or ineffective during communication. In addition to this, there is also a part of the unlicensed frequency, as shown by the shadow of the carrier. Unauthorized frequency can be understood as not being assigned to any industry or business, or not permanently occupied in the communication process of an industry.

Here, all the carrier frequency points or actual carrier frequency points of the radio frequency part are defined as absolute carriers, and the carrier frequency points actually defined in the communication process are defined as logical carriers, that is, the logical carrier is removed from the unavailable or invalid carrier frequency points. The available frequency points outside.

In the actual resource allocation process, an index value is needed to indicate a specific carrier or channel, and FIG. 5 is taken as an example to specifically describe the carrier index value. In FIG. 5, all carriers are numbered, and the number of 0-11 can be understood as an absolute physical carrier index, and the absolute physical carrier index indicates an absolute carrier, that is, all carrier frequency points or actual carrier frequency points.

Figure 6 shows the carrier index of three different times t ₀ , t ₁ , t ₂ . At time t ₀ , the available carriers except for the unavailable or invalid carrier frequency are rearranged, and the obtained number of 0-4 is understood as a logical carrier index, and the logical carrier index indicates the actually available carrier. The time t ₁ and t ₂ are the logical carrier index obtained after the t ₀ frequency hopping transmission.

The terminal device needs to know the valid carrier before data transmission. For the indication manner of the carrier, different indication manners of the logical carrier index and the absolute physical carrier index may be used to indicate the available carriers.

For example, before the terminal device receives the first indication information sent by the network device, the terminal device receives a first message sent by the network device, where the first message is used to determine the logical carrier index.

Optionally, the terminal device may identify the valid carrier by using the broadcast message sent by the network device, that is, the first message is a part or all of the messages included in the broadcast message. By broadcasting the content of the message, the network device and the terminal device in the communication system can recognize the valid carrier and rearrange the logical carrier index. The carrier and the logical carrier index indicated in the broadcast message have a one-to-one mapping relationship. For example, the carrier carrying the #A in the broadcast message is an available effective carrier, corresponding to the carrier with the absolute physical carrier index number 5 in FIG. 5, or After rearranging to form a logical carrier index, it corresponds to a carrier with a logical carrier index number of 2 at time t ₀ in FIG.

The broadcast message may be a system message, wherein the system message may include a master information block (MIB) message or a system information block (SIB) message, and the application is not limited thereto.

Optionally, the broadcast message may carry a frequency hopping switch to indicate whether the current transmission uses frequency hopping. Before the data transmission, the terminal device can judge whether the current transmission uses the frequency hopping transmission according to the broadcast message.

The frequency hopping transmission refers to the frequency of the carrier when the network device or the terminal device transmits data according to the agreed pattern or sequence within a certain frequency band. For example, frequency hopping is performed after a period of time (e.g., 400 milliseconds) is transmitted on each channel, and the time of each channel transmission is specified by a protocol. The frequency hopping pattern represents the variation of the signal carrier frequency (channel) of both communicating parties. For example, the network device and the terminal device perform data transmission and reception according to the rule. In other words, according to the frequency hopping pattern, it can be obtained on which channel a data transmission is performed at a certain moment.

When the terminal user completes the access process and starts data transmission, the downlink control channel carries the downlink control information transmission, and the downlink control information includes the first type of control information that represents the downlink resource scheduling and the second type of control information that represents the uplink resource scheduling. That is, the downlink control information can invoke the downlink air interface resource and the uplink air interface resource.

Optionally, the downlink control information refers to the DCI information that is sent by the network device to the terminal device, and specifically includes the first type of control information that is used to identify the downlink resource scheduling, such as format 1; and the second type of control information that identifies the uplink resource scheduling, for example, Format 0.

In the embodiment of the present application, the network device sends the first indication information to the terminal device, where the first indication information is the newly added indication information of at least 1 bit in the downlink control information. The at least one bit of indication information is used to indicate whether the carrier index used in the current downlink control information is a logical carrier index or an absolute physical carrier index.

In step 320, the terminal device receives the second indication information that is sent by the network device, where the second indication information is used to indicate an index of the first carrier, where the index manner of the first carrier is The first index method is described.

It should be understood that the first indication information and the second indication information may be the indication information that is sent together, and may be carried in one type of information, or may be separately sent. The embodiment of the present application is not limited thereto.

For example, the first indication information is at least one bit of indication information newly added in the downlink control information, and the second indication information is indication information including at least 9 bits immediately after the at least one bit in the downlink control information, that is, a carrier indication. . The terminal device can directly communicate on the carrier channel indicated by the carrier indication value of at least 9 bits, that is, realize data transmission between the terminal device and the network device.

The downlink control information includes the first type of control information that is used for the downlink resource scheduling and the second type of control information that is used for the uplink resource scheduling, that is, the downlink control information can invoke the downlink air interface resource and the uplink air interface resource.

The value of the carrier index differs according to the above one bit, and the physical meaning of the representation is also different.

For example, when the value of 1 bit is 0, it indicates that the carrier resource indicated by the logical carrier index is used for data transmission; if the 1 bit is 1, it indicates that the carrier resource indicated by the absolute physical carrier index is used for data transmission.

In step 330, the terminal device determines the first carrier according to the first indication information and the second indication information, and communicates with the network device by using the first carrier.

Specifically, according to the difference of the value of the 1 bit, the specific carrier indication has the following cases.

Case 1:

When the terminal device determines, according to the first indication information, that the first index mode is an absolute physical carrier index mode, the second indication information is an index of the first carrier; An index of a carrier determines a first carrier and communicates with the network device over the first carrier.

Specifically, when 1 bit is 1, the terminal device determines that the current transmission uses the carrier indicated by the absolute physical carrier index, and the 9-bit indication information is an index value sequence, and the carrier indicated by the index value sequence is currently available for communication. Carrier.

In the narrowband system, when the terminal device can determine, according to the first indication information, that the current transmission uses an absolute physical carrier index, the second indication information may be an index of the absolute physical carrier, according to the index value and the system message. The mapping relationship determines the carrier that can be used for communication for communication. Such an indication manner can effectively reduce the complexity of the indication and implement a more flexible indicator carrier resource.

It should be understood that when the carrier that can be used for communication is determined to communicate, the carrier of the communication may be located at an authorized frequency allocated to the industry, or may be an unlicensed frequency temporarily occupied under the premise of satisfying the regulations. Not limited.

Case 2:

When the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device determines, according to the second indication information and the first message, the first carrier. An index of the first carrier corresponds to the first carrier; the terminal device determines the first carrier according to an index of the first carrier, and communicates with the network device by using the first carrier.

Specifically, when 1 bit is 0, the terminal device determines that the current transmission uses the carrier indicated by the logical carrier index, and then obtains an index value sequence according to the 9-bit indication information, and the terminal device combines the one-to-one correspondence between the index value sequence and the first message. A further sequence of index values is obtained, then the carrier indicated by the sequence of index values is the carrier currently available for communication.

For example, the carrier and the logical carrier index indicated in the broadcast message have a one-to-one mapping relationship to determine the currently available carrier by the sequence of index values.

In the narrowband system, when the terminal device can determine, according to the first indication information, that the current transmission uses a logical carrier index, an index value can be obtained by combining the second indication information with the first message, according to the index value and the system message. The mapping relationship determines the carrier that can be used for communication for communication. Such an indication manner can effectively reduce the complexity of the indication and implement a more flexible indicator carrier resource.

Case 3:

As an embodiment, but not limited to, when the terminal device determines, by using a broadcast message, that the current transmission is a frequency hopping transmission, and when the terminal device determines, according to the first indication information, that the first index mode is the logical carrier index mode, The terminal device determines an index of the first carrier according to the second indication information and a preset hopping formula, where the index of the first carrier corresponds to the first carrier, and the terminal device determines according to the index of the first carrier The first carrier is in communication with the network device by using the first carrier.

Specifically, the terminal device determines, according to the 1 bit, that the terminal device uses the carrier indicated by the logical carrier index in the current transmission, obtains an index value sequence according to the 9-bit indication information, and brings the sequence of the index value into the frequency hopping formula to obtain a valid physical carrier. The index, that is, the index sequence after frequency hopping, determines the carrier actually used for the current communication by using the index of the effective physical carrier and the one-to-one mapping relationship in the broadcast message.

It should be understood that the index of the effective physical carrier changes at different times as the frequency hopping changes, but has a one-to-one mapping relationship. For example, at time 1, corresponding to the effective physical carrier index 1; at time 2, corresponding to the effective physical carrier index 2.

In addition, in addition to the above three cases, when the terminal device uses the absolute physical carrier index, there is little or no scenario for frequency hopping transmission, because when the absolute physical carrier index is used, participating in the frequency hopping transmission causes the resource indication to change. It's more complicated, and for the top, the instructions can get complicated. Therefore, the absolute physical carrier index is mainly used in the scenario of non-frequency hopping transmission.

The method provided by the embodiment of the present application indicates the indication mode of the downlink or the uplink resource by using the downlink control information carried by the downlink control channel, and the logical carrier index set, the network device, and the terminal device are sent by using the broadcast information in the indication manner of the logical carrier index. It is clear that the communication can be completed in the frequency hopping mode or the non-frequency hopping mode through the logical carrier index. At the same time, the frequency hopping mode obviously has a clearer and concise manner, and the instruction mode for saving the calculation amount; if the frequency hopping is not used, only the channel bandwidth is arranged. The effective carrier bandwidth can also reduce the number of bits. If it is an indication of the absolute physical carrier index, it is usually used in a mode without frequency hopping, especially in a frequency band that can use certain frequency points in grayscale, and does not need to update the system broadcast message. Usually, this is temporary use of a certain The channel carrier index can also conveniently and directly use a certain channel carrier index.

In step 340, communication is performed with the network device over the first carrier.

After the terminal device determines the carrier (ie, the first carrier) for communicating with the network device, the carrier can communicate with the network device.

Thereby, the communication process between the terminal device and the network device is completed.

The embodiment of the present application is described in detail above with reference to FIG. 3 to FIG. 6 , and the communication device of the embodiment of the present application will be described in detail below with reference to FIG. 7 to FIG. 10 . Specifically, the embodiment of the terminal device and the network device will be described. It should be understood that the embodiment of the terminal device and the embodiment of the network device and the method embodiment correspond to each other, and a similar description may refer to the method embodiment.

FIG. 7 is a schematic block diagram of an embodiment of a communication device 700 according to an embodiment of the present application. The communication device 700 may correspond to (eg, may be configured or itself) a terminal device described in the foregoing method 300.

As shown in FIG. 7, the communication device 700 can include a communication unit 710 and a processing unit 720, it being understood that the communication device can include some or all of the following units.

The communication unit 710 is configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate a first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier The first carrier is a carrier used for communication between the terminal device and the network device, and the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode.

As an implementation manner, the first indication information is newly added 1 bit indication information in the downlink control information. The 1 bit indication information indicates whether the carrier index used in the current downlink control information is a logical carrier index or an absolute physical carrier index.

Optionally, the terminal device needs to know a valid carrier before performing data transmission. For the indication manner of the carrier, different indication manners of the logical carrier index and the absolute physical carrier index may be used to indicate the available carriers. Specifically, all carrier frequency points or actual carrier frequency points of the radio frequency part are absolute carriers, and the carrier frequency points actually defined in the communication process are defined as logical carriers, that is, the logical carrier is removed from the unavailable or invalid carrier frequency points. Available frequency points. In the actual resource allocation process, an index value is needed to indicate a specific carrier or channel. By setting different carrier indication modes to meet the resource division requirements in different transmission situations in narrowband systems.

Optionally, the downlink control information includes the first type of control information that is used for the downlink resource scheduling and the second type of control information that is used for the uplink resource scheduling, that is, the downlink control information can invoke the downlink air interface resource and the uplink air interface resource. Specifically, information such as format1 or format0 format. The value of the carrier index differs according to the above one bit, and the physical meaning of the representation is also different.

The communication unit 710 is further configured to receive the second indication information that is sent by the network device, where the second indication information is used to indicate an index of the first carrier, where an indexing manner of the first carrier is the first Index method.

For example, the first indication information is the newly added 1 bit indication information in the downlink control information, and the second indication information is the indication information including the 9 bits, that is, the carrier indication, immediately after the 1 bit in the downlink control information. The terminal device can directly communicate on the carrier channel indicated by the 9-bit carrier indication value, that is, realize data transmission between the terminal device and the network device.

The processing unit 720 is configured to determine the first carrier according to the first indication information and the second indication information.

Specifically, when 1 bit is 1, the terminal device determines that the current transmission uses the carrier indicated by the absolute physical carrier index.

Optionally, when the terminal device determines, according to the first indication information, that the first index mode is the logical carrier index mode, the terminal device determines an index of the first carrier according to the second indication information, The index of the first carrier corresponds to the first carrier; the terminal device determines the first carrier according to the index of the first carrier, and communicates with the network device by using the first carrier.

Specifically, when 1 bit is 0, the terminal device determines that the current transmission uses the carrier indicated by the logical carrier index, and then obtains an index value sequence according to the 9-bit indication information, and the carrier indicated by the index value sequence is the carrier currently available for communication. .

When the terminal device determines that the current transmission is a frequency hopping transmission by using a broadcast message, and when the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device according to the The second indication information and the preset frequency hopping formula determine an index of the first carrier, where the index of the first carrier corresponds to the first carrier, and the terminal device determines the first carrier according to the index of the first carrier, and passes the The first carrier is in communication with the network device.

Optionally, when the terminal device determines, according to the first indication information, that the first index mode is an absolute physical carrier index mode, the terminal device determines an index of the first carrier according to the second indication information, where The index of the first carrier corresponds to the first carrier; the terminal device determines the first carrier according to the index of the first carrier, and communicates with the network device by using the first carrier.

For example, when 1 bit is 1, the terminal device determines that the current transmission uses the carrier indicated by the absolute physical carrier index.

As an embodiment, when an absolute physical carrier index is used, there is little or no scenario for frequency hopping transmission, because when using an absolute physical carrier index, participating in frequency hopping transmission makes the resource indication more complicated. For high-level, the instructions can also become complicated. Therefore, the absolute physical carrier index is mainly used in the scene of non-frequency hopping transmission.

When the terminal device determines that the first index mode is an absolute physical carrier index mode according to the first indication information, the terminal device determines an index of the first carrier according to the second indication information, where the first carrier The index corresponds to the first carrier; the terminal device determines the first carrier according to the index of the first carrier, and communicates with the network device by using the first carrier.

Specifically, the 1 bit is 1 indicates that the carrier that uses the absolute physical carrier index indication is currently transmitted, and then an index value sequence is obtained according to the 9-bit indication information, and the carrier indicated by the index value sequence is the carrier currently available for communication. After the processing unit 720 determines the first carrier currently used for communication, the communication unit 710 communicates with the network device through the first carrier.

In one possible design, the communication device 700 can be a terminal device or a chip configured in the terminal device.

It should be understood that the communication device 700 can correspond to a terminal device in the communication method 300 according to an embodiment of the present application, and the communication device 700 can include a module for performing the method performed by the terminal device of the communication method 300 of FIG. Moreover, the modules in the communication device 700 and the other operations and/or functions described above are respectively used to implement the corresponding flow of the communication method 300 in FIG. 3, and specifically, the communication unit 710 is used in steps 320, 320 and 300 in the method 300. In the step 340, the processing unit 720 is configured to perform the step 330 in the method 300. The specific process of performing the foregoing steps in each unit has been described in detail in the method 300. For brevity, details are not described herein again.

FIG. 8 is a schematic block diagram of a communication device 800 provided by an embodiment of the present application. The communication device 800 may correspond to (eg, may be configured or itself) a network device described in the foregoing method 300.

As shown in FIG. 8, the communication device 800 can include a communication unit 810 and a processing unit 820.

The communication unit 810 is configured to send the first indication information to the terminal device, where the first indication information is used to indicate a first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier, The first carrier is a carrier used for communication between the network device and the terminal device, and the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode.

Optionally, the 1-bit indication information may be information in format1 or format0 format in the downlink control information. The value of the carrier index differs according to the above one bit, and the physical meaning of the representation is also different.

The communication unit 810 is further configured to send the second indication information to the terminal device, where the second indication information is used to indicate an index of the first carrier, where an indexing manner of the first carrier is the first index mode.

For example, the first indication information is newly added 1-bit indication information in the downlink control information, and the second indication information is indication information including 9 bits immediately after the 1 bit in the downlink control information, that is, a carrier indication. The terminal device can directly communicate on the carrier channel indicated by the 9-bit carrier indication value, that is, realize data transmission between the terminal device and the network device.

The processing unit 820 is configured to determine the first carrier according to the first indication information and the second indication information.

Specifically, when 1 bit is 1, it indicates that the current transmission uses the carrier indicated by the absolute physical carrier index.

Specifically, when 1 bit is 0, it indicates that the current transmission uses the carrier indicated by the logical carrier index.

As another implementation manner, when the logical carrier index is used, the network device first sends a broadcast message, where the broadcast message includes a frequency hopping switch to indicate whether the current system uses frequency hopping. If the frequency hopping switch enables frequency hopping, the logical carrier index is used to participate in the frequency hopping formula, and the carrier index after frequency hopping is obtained, that is, the first carrier index, and then the mapping relationship between the carrier index and the system message is used to determine the actual receiving or sending. Carrier channel.

After the processing unit 820 determines the first carrier currently used for communication, the communication unit 810 communicates with the network device through the first carrier.

In one possible design, the communication device 800 can be a network device or a chip configured in a network device.

It should be understood that the communication device 800 can correspond to a network device in the communication method 300 in accordance with an embodiment of the present application, which can include a module for performing the method performed by the network device of the communication method 300 of FIG. Moreover, each module in the communication device 800 and the other operations and/or functions described above are respectively used to implement the corresponding flow of the communication method 300 in FIG. 3, specifically, the communication unit 810 is used in steps 320, 320, and in the method 300. In the step 340, the processing unit 820 is configured to perform the step 330 in the method 300. The specific process of performing the foregoing steps in each unit has been described in detail in the method 300. For brevity, details are not described herein again.

FIG. 9 is a schematic structural diagram of a terminal device 900 according to an embodiment of the present application. As shown in FIG. 9, the terminal device 900 includes a processor 910 and a transceiver 920. Optionally, the terminal device 900 further includes a memory 930. The processor 910, the transceiver 920, and the memory 930 communicate with each other through an internal connection path for transferring control and/or data signals. The memory 930 is used to store a computer program, and the processor 910 is configured to be called from the memory 930. The computer program is run to control the transceiver 920 to send and receive signals.

The processor 910 and the memory 930 may be combined to form a processing device, and the processor 910 is configured to execute the program code stored in the memory 930 to implement the above functions. In a specific implementation, the memory 930 can also be integrated in the processor 910 or independent of the processor 910.

The foregoing terminal device may further include an antenna 940, configured to send downlink data or downlink control signaling output by the transceiver 920 by using a wireless signal.

Specifically, the terminal device 900 may correspond to a terminal device in the communication method 300 according to an embodiment of the present application, and the terminal device 900 may include a module for performing a method performed by the terminal device of the communication method 300 of FIG. Moreover, each module in the terminal device 900 and the other operations and/or functions described above are respectively implemented to implement the corresponding flow of the communication method 300 in FIG. Specifically, the memory 930 is configured to store program code, such that when the program code is executed, the processor 910 executes step 330 in the method 300, and controls the transceiver 920 to perform step 310, step 320 in the method 300 through the antenna 940. Or, in step 340, the specific process of performing the foregoing steps in each module has been described in detail in the method 300. For brevity, details are not described herein again.

FIG. 10 is a schematic structural diagram of a terminal device 1000 according to an embodiment of the present application. As shown in FIG. 10, the terminal device 1000 includes a processor 1001 and a transceiver 1002. Optionally, the terminal device 1000 further includes a memory 1003. The processor 1002, the transceiver 1002, and the memory 1003 communicate with each other through an internal connection path, and the control device and the data signal are transmitted. The memory 1003 is used to store a computer program, and the processor 1001 is used to read the memory 1003. The computer program is called and run to control the transceiver 1002 to send and receive signals.

The processor 1001 and the memory 1003 described above may synthesize a processing device 1004 for executing the program code stored in the memory 1003 to implement the above functions. In a specific implementation, the memory 1003 may also be integrated in the processor 1001 or independent of the processor 1001. The terminal device 1000 may further include an antenna 1010, configured to send uplink data or uplink control signaling output by the transceiver 1002 by using a wireless signal.

Specifically, the terminal device 1000 may correspond to a terminal device in the communication method 300 according to an embodiment of the present application, and the terminal device 1000 may include a module for performing a method performed by the terminal device of the communication method 300 of FIG. 3, and The modules in the terminal device 1000 and the other operations and/or functions described above are respectively implemented in order to implement the corresponding flow of the communication method 300 in FIG. Specifically, the memory 1003 is configured to store the program code, so that when the program code is executed, the processor 1001 executes step 330 in the method 300, and controls the transceiver 1002 to perform step 310 or step 320 or step 340 in the method 300, The specific process in which each module performs the above-mentioned corresponding steps has been described in detail in the method 300. For brevity, no further details are provided herein.

The above-mentioned processor 1001 can be used to perform the actions implemented by the terminal in the foregoing method embodiments, and the transceiver 1002 can be used to perform the actions of the terminal to transmit or transmit to the terminal device described in the foregoing method embodiments. For details, please refer to the description in the previous method embodiments, and details are not described herein again.

The processor 1001 and the memory 1003 described above may be integrated into one processing device, and the processor 1001 is configured to execute program code stored in the memory 1003 to implement the above functions. In a specific implementation, the memory 1003 can also be integrated in the processor 1001.

The terminal device 1000 described above may further include a power source 1005 for providing power to various devices or circuits in the terminal.

In addition, in order to make the function of the terminal device more perfect, the terminal device 1000 may further include one or more of an input unit 1014, a display unit 1016, an audio circuit 1018, a camera 1020, a sensor 1022, and the like, the audio circuit. A speaker 1082, a microphone 1084, and the like can also be included.

FIG. 11 is a schematic structural diagram of a network device 1100 according to an embodiment of the present application. As shown in FIG. 11, the network device 1100 includes a processor 1110 and a transceiver 1120. Optionally, the network device 1100 further includes a memory 1130. The processor 1110, the transceiver 1120, and the memory 1130 communicate with each other through an internal connection path for transferring control and/or data signals. The memory 1130 is configured to store a computer program, and the processor 1110 is configured to be called from the memory 1130. The computer program is run to control the transceiver 1120 to send and receive signals.

The processor 1110 and the memory 1130 described above may synthesize a processing device, and the processor 1110 is configured to execute the program code stored in the memory 1130 to implement the above functions. In a specific implementation, the memory 1130 may also be integrated in the processor 1110 or independent of the processor 1110.

The network device may further include an antenna 1140, configured to send downlink data or downlink control signaling output by the transceiver 1120 by using a wireless signal.

Specifically, the network device 1100 may correspond to a network device in the communication method 300 according to an embodiment of the present application, and the network device 1100 may include a module for performing a method performed by the network device of the communication method 300 of FIG. Moreover, each module in the network device 1100 and the other operations and/or functions described above are respectively implemented to implement the corresponding flow of the communication method 300 in FIG. Specifically, the memory 1130 is configured to store the program code, so that when the program code is executed, the processor 1110 executes step 330 in the method 300, and controls the transceiver 1120 to perform step 310, step 320 in the method 300 through the antenna 1140. Or, in step 340, the specific process of performing the foregoing steps in each module has been described in detail in the method 300. For brevity, details are not described herein again.

FIG. 12 is a schematic structural diagram of a network device 1200 according to an embodiment of the present disclosure. It can be used to implement the functions of the network devices in 300 of the above methods. For example, it can be a schematic diagram of a base station. As shown in FIG. 12, the base station can be applied to the system as shown in FIG. 1. The base station 1200 includes one or more radio frequency units, such as a remote radio unit (RRU) 1201 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 1202. . The RRU 1201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1203 and a radio frequency unit 1204. The RRU 1201 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting the signaling messages described in the foregoing embodiments to the terminal device. The BBU 1202 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 1201 and the BBU 1202 may be physically disposed together or physically separated, that is, distributed base stations.

The BBU 1202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, and the like. For example, the BBU (determination unit) 1202 can be used to control the base station 1200 to perform an operational flow of the network device in the embodiment of the method 300 described above.

In an example, the BBU 1202 may be composed of one or more boards, and multiple boards may jointly support a single access standard radio access network (such as an LTE system or an NR system), or may support different ones. Access to the standard wireless access network. The BBU 1202 also includes a memory 1205 and a processor 1206. The memory 1205 is used to store necessary instructions and data. For example, the memory 1205 stores the codebook or the like in the above embodiment. The processor 1206 is configured to control the base station to perform necessary actions, for example, to control the base station to perform an operation procedure of the network device in the foregoing method embodiment. The memory 1205 and the processor 1206 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.

In a possible implementation manner, with the development of System-on-chip (SoC) technology, all or part of the functions of the 1202 part and the 1201 part may be implemented by SoC technology, for example, by a base station function chip. The base station function chip integrates a processor, a memory, an antenna interface and the like. The program of the base station related function is stored in the memory, and the processor executes the program to implement the related functions of the base station. Optionally, the base station function chip can also read the memory external to the chip to implement related functions of the base station.

It should be understood that the structure of the base station illustrated in FIG. 12 is only one possible form, and should not be construed as limiting the embodiments of the present application. This application does not preclude the possibility of other forms of base station architecture that may arise in the future.

The embodiment of the present application further provides a communication system including the foregoing network device and one or more terminal devices.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration. Application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

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 memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic randomness. Synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (DR RAM).

According to the method provided by the embodiment of the present application, the application further provides a computer program product, comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute the embodiment shown in FIG. The method in .

According to the method provided by the embodiment of the present application, the present application further provides a computer readable medium storing program code, when the program code is run on a computer, causing the computer to execute the embodiment shown in FIG. The method in .

According to the method provided by the embodiment of the present application, the application further provides a system including the foregoing network device and one or more terminal devices. The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may 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. When the computer program instructions are loaded or executed on a computer, the processes or functions according to embodiments of the present application are 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 transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be wired from a website site, computer, server or data center (for example, infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media. The usable medium can be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium. The semiconductor medium can be a solid state hard drive.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection 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 solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A communication method, comprising:

The terminal device receives the first indication information that is sent by the network device, where the first indication information is used to indicate a first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier, where The first carrier is a carrier used for communication between the terminal device and the network device, and the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode.

The terminal device receives the second indication information that is sent by the network device, where the second indication information is used to indicate an index of the first carrier, where the index of the first carrier is the first index the way;

The terminal device determines the first carrier according to the first indication information and the second indication information, and communicates with the network device by using the first carrier.
The method according to claim 1, wherein the determining, by the terminal device, the first carrier according to the first indication information and the second indication information comprises:

When the terminal device determines that the first index mode is an absolute physical carrier index mode according to the first indication information, the second indication information is an index of the first carrier;

The terminal device determines a first carrier according to an index of the first carrier, and communicates with the network device by using the first carrier.
The method according to claim 1 or 2, wherein before the receiving, by the terminal device, the first indication information sent by the network device, the method further comprises:

The terminal device receives a first message sent by the network device, where the first message is used to determine the logical carrier index.
The method according to claim 3, wherein the determining, by the terminal device, the first carrier according to the first indication information and the second indication information comprises:

When the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device determines, according to the second indication information and the first message, the first carrier. An index, where the index of the first carrier corresponds to the first carrier;

The terminal device determines the first carrier according to an index of the first carrier, and communicates with the network device by using the first carrier.
The method of claim 4 wherein the first message is a broadcast message.
The method according to claim 4 or 5, wherein the first message further comprises frequency hopping indication information, and the terminal device determines, according to the frequency hopping indication information, whether the current transmission is a frequency hopping transmission.
The method according to claim 6, wherein when the current transmission is a frequency hopping transmission, the terminal device determines the first carrier according to the first indication information and the second indication information, including:

When the terminal device determines that the first index mode is the logical carrier index mode according to the first indication information, the terminal device determines, according to the second indication information and a preset frequency hopping formula, a valid physical carrier. index;

Determining, by the terminal device, an index of the first carrier according to the first message and an index of the valid physical carrier, where an index of the first carrier corresponds to a first carrier;

The terminal device determines the first carrier according to an index of the first carrier, and communicates with the network device by using the first carrier.
The method according to any one of claims 1 to 7, wherein the first indication information is at least one bit of indication information included in the downlink control information.
A communication method, comprising:

The network device sends the first indication information to the terminal device, where the first indication information is used to indicate a first index mode of the at least two index modes, where the first index mode is an index mode of the first carrier, where the The first carrier is a carrier used for communication between the network device and the terminal device, and the at least two index modes include a logical carrier index mode and an absolute physical carrier index mode.

The network device sends the second indication information to the terminal device, where the second indication information is used to indicate the index of the first carrier, where the index of the first carrier is the first index mode;

The network device determines the first carrier by using the first indication information and the second indication information, and communicates with the terminal device by using the first carrier.
The method according to claim 9, wherein the determining, by the network device, the first carrier by using the first indication information and the second indication information comprises:

When the network device determines, according to the first indication information, that the first index mode is an absolute physical carrier index mode, the second indication information is an index of the first carrier;

The network device determines a first carrier according to an index of the first carrier, and communicates with the terminal device by using the first carrier.
The method according to claim 9 or 10, wherein before the sending, by the network device, the first indication information to the terminal device, the method further includes:

The network device sends a first message to the terminal device, where the first message is used to determine the logical carrier index.
The method according to claim 11, wherein the determining, by the network device, the first carrier by using the first indication information and the second indication information comprises:

When the network device determines, according to the first indication information, that the first index mode is the logical carrier index mode, the network device determines, according to the second indication information and the first message, a first carrier. An index, where the index of the first carrier corresponds to the first carrier;

The network device determines the first carrier according to an index of the first carrier, and communicates with the terminal device by using the first carrier.
The method of claim 12 wherein said first message is a broadcast message.
The method according to claim 11 or 12, wherein the first message further comprises frequency hopping indication information, and the network device determines, according to the frequency hopping indication information, whether the current transmission is a frequency hopping transmission.
The method according to claim 14, wherein when the current transmission is a frequency hopping transmission, the network device determines the first carrier by using the first indication information and the second indication information, including:

When the network device determines, according to the first indication information, that the first index mode is the logical carrier index mode, the network device determines, according to the second indication information and a preset frequency hopping formula, a valid physical carrier. index;

Determining, by the network device, an index of the first carrier according to the first message and an index of the valid physical carrier, where an index of the first carrier corresponds to a first carrier;

The network device determines the first carrier according to an index of the first carrier, and communicates with the terminal device by using the first carrier.
The method according to any one of claims 9 to 15, wherein the first indication information is at least one bit of indication information included in the downlink control information.
A communication device, comprising:

A processor, coupled to the memory, to execute the instructions in the memory to implement the method of any one of claims 1 to 16.
The device according to claim 17, further comprising:

The memory is used to store program instructions and data.