WO2020030020A1

WO2020030020A1 - Bandwidth part switching method, method for indicating bandwidth part switching, terminal, and network apparatus

Info

Publication number: WO2020030020A1
Application number: PCT/CN2019/099698
Authority: WO
Inventors: 纪刘榴; 李俊超; 毕晓艳
Original assignee: 华为技术有限公司
Priority date: 2018-08-10
Filing date: 2019-08-08
Publication date: 2020-02-13

Abstract

A network apparatus of an embodiment of the present invention, when sending bandwidth part indication information to a terminal via downlink control information, imposes certain constraints on an uplink transmission mode on an indicated bandwidth part or SRS-related configuration information, and on other indication information carried in the downlink control information, such that the terminal does not encounter ambiguity when parsing the bandwidth part indication information. Alternatively, viewed from the terminal side, when the terminal receives the bandwidth part indication information sent by the network apparatus via the downlink control information at the terminal, the terminal parses the downlink control information and configuration information on the bandwidth part indicated by the bandwidth part indication information using a non-ambiguous manner of interpretation, thereby successfully completing BWP switching to perform uplink transmission, improving efficiency of uplink transmission, and enhancing system robustness.

Description

Bandwidth resource switching method, instructing bandwidth resource switching method, terminal and network equipment

This application requires the submission of the State Intellectual Property Office of China on August 10, 2018, application number 201810910947.4, and the application name is "Bandwidth Resource Switching Method, Indicating Bandwidth Resource Switching Method, Terminal and Network Equipment", and March 29, 2019 Priority filed for a Chinese patent application with the State Intellectual Property Office of China, application number 201910252616.0, and application name "Bandwidth Resource Switching Method, Indicating Bandwidth Resource Switching Method, Terminal and Network Equipment", the entire contents of which are incorporated herein by reference .

Technical field

The present application relates to the field of communications technologies, and in particular, to a bandwidth resource switching method, an indication bandwidth resource switching method, a terminal, and a network device.

Background technique

As a next-generation wireless communication standard, in New Radio (NR) technology, one way for network devices to allocate frequency (also known as frequency domain) resources to terminals is: network devices configure bandwidth for terminals from system frequency resources Resources, the network device schedules the terminal in the configured bandwidth resource, and some or all of the configured bandwidth resources can be allocated to the terminal for communication between the network device and the terminal.

As shown in FIG. 1, the system frequency resource is also called carrier bandwidth (Carrier Bandwidth), and it includes at least one bandwidth resource. In this article, bandwidth resources are also called Bandwidth Part (BWP). The two have the same meaning and can be interchanged. The bandwidth part can be continuous or discontinuous part of the system frequency resources, or it can be all the resources in the system frequency resources. Each bandwidth part contains at least one continuous subband or frequency domain resource block. Each subband or frequency The domain resource block further includes a plurality of consecutive subcarriers.

Each bandwidth portion may correspond to a set of parameters, including, for example, but not limited to, subcarrier spacing and cyclic prefix (CP). Different bandwidth portions may correspond to different parameters. Optionally, in the same transmission time interval (Transmission Time Interval, TTI), among multiple bandwidth parts, only one bandwidth part may be available, and other bandwidth parts may not be available. The so-called availability means that the communication process mainly occurs on the bandwidth part. There can also be multiple bandwidth portions available, other bandwidth portions are unavailable. In the unavailable bandwidth part, data transmission and reception are generally not performed, and a measurement process of wireless resource management can be performed.

BWP can also be divided into downlink BWP and uplink BWP. The downlink BWP is used for the downlink communication process, mainly for the transmission of downlink signals and downlink channels; the uplink BWP is used for the uplink communication process, mainly for the transmission of uplink signals and uplink channels.

In the process of system communication, a scheduling method in which network devices selectively schedule bandwidth resources for terminals based on the frequency domain is a common scheduling method. Network equipment can choose a BWP with better channel conditions to communicate with the terminal. Therefore, in addition to the BWP that is currently activated, there may be a BWP with better channel conditions. In this case, the system expects to be able to flexibly switch the BWP of the terminal's current activated state.

However, when the BWP information indicated by the network device to the terminal is different from the BWP information in the current activation state, how to perform uplink transmission by the terminal are several technical issues that need to be solved urgently.

Summary of the invention

In view of this, it is necessary to provide a method for instructing bandwidth resource switching. By sending bandwidth resource instruction information to the terminal, the terminal can be instructed to smoothly perform BWP handover according to the bandwidth resource instruction information.

At the same time, a bandwidth resource switching method is provided, which performs BWP switching and uplink transmission according to the bandwidth resource instruction information and the configuration of the indicated bandwidth resource uplink transmission mode configuration or channel sounding reference signal configuration.

At the same time, a network device is provided to instruct the terminal to smoothly perform BWP handover according to the bandwidth resource instruction information by sending the bandwidth resource instruction information to the terminal.

At the same time, a terminal is provided that can perform BWP handover and uplink transmission according to the received bandwidth resource instruction information and the configuration of the indicated bandwidth resource uplink transmission mode configuration or channel sounding reference signal configuration.

According to a first aspect of the embodiments of the present invention, a method for instructing bandwidth resource switching is provided, including:

The network device sends bandwidth resource configuration information to the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a bandwidth resource in a first activation state;

The network device sends downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.

According to a second aspect of the embodiments of the present invention, a method for switching bandwidth resources is provided, including:

The terminal receives downlink control information, and the downlink control information carries bandwidth resource indication information;

Determining, by the terminal, the indicated bandwidth resource according to the bandwidth resource indication information;

When the indicated bandwidth resource is different from the currently activated bandwidth resource, the currently effective bandwidth resource is determined according to the uplink transmission mode or the configuration of the channel sounding reference signal on the indicated bandwidth resource.

According to a third aspect of the embodiments of the present invention, a network device is provided, including:

A processing unit configured to configure bandwidth resource configuration information for the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a first effective bandwidth resource;

A sending unit, configured to send the bandwidth resource configuration information to a terminal;

The sending unit is further configured to send downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.

According to a fourth aspect of the embodiments of the present invention, a terminal is provided, including:

A receiving unit, configured to receive downlink control information, where the downlink control information carries bandwidth resource indication information;

A processing unit, configured to determine an indicated bandwidth resource according to the bandwidth resource instruction information; and when the indicated bandwidth resource is different from a currently activated bandwidth resource, according to an uplink transmission mode on the indicated bandwidth resource Or the configuration of the channel sounding reference signal to determine the currently effective bandwidth resources.

According to a fifth aspect of the embodiments of the present invention, a network device is provided, including:

A processor, configured to configure bandwidth resource configuration information for the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a first effective bandwidth resource;

A transceiver, configured to send the bandwidth resource configuration information to a terminal;

The transceiver is further configured to send downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.

According to a sixth aspect of the embodiments of the present invention, a terminal is provided, including:

A transceiver, configured to receive downlink control information, where the downlink control information carries bandwidth resource indication information;

A processor, configured to determine an indicated bandwidth resource according to the bandwidth resource instruction information; and when the indicated bandwidth resource is different from a currently activated bandwidth resource, according to an uplink transmission mode on the indicated bandwidth resource Or the configuration of the channel sounding reference signal to determine the currently effective bandwidth resources.

According to a seventh aspect of the embodiments of the present invention, a processor is provided. The processor includes at least one circuit, where the at least one circuit is configured to perform the bandwidth resource switching method or to perform the indicated bandwidth. Method of resource switching.

According to an eighth aspect of the embodiments of the present invention, a processing device is provided, including:

Memory, user storage instructions;

The processor is configured to read an instruction stored in the memory and execute any one of the foregoing methods.

The memory may be a non-transitory memory, such as a read-only memory (Read Only Memory, ROM), which may be integrated on the same chip as the processor, or may be separately provided on different chips. The present invention implements The example does not limit the type of memory and how the memory and processor are set.

According to a ninth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, and includes instructions that, when run on a computer, cause the computer to execute any of the foregoing methods.

Computer-readable storage media are non-transitory.

According to a tenth aspect of the embodiments of the present invention, a computer program product containing instructions is provided, which when executed on a computer, causes the computer to execute any of the foregoing methods.

According to the technical solution provided by the embodiment of the present invention, when the BWP indicated by the bandwidth resource indication information of the network device is different from the BWP in the current active state, the terminal according to the configuration of the uplink transmission mode on the indicated BWP or the channel detection reference The configuration of the signal correctly interprets the indicated BWP, so as to determine whether the indicated BWP is set as the currently effective bandwidth resource to correctly perform uplink transmission. Implementation of the embodiments of the present invention can improve the robustness and uplink transmission quality of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a component of a carrier bandwidth according to an embodiment of the present invention; FIG.

2 is an exemplary schematic diagram of a wireless communication network according to an embodiment of the present invention;

3 is a schematic flowchart of a method for instructing a bandwidth resource switch according to an embodiment of the present invention;

4 is a schematic flowchart of a bandwidth resource switching method according to an embodiment of the present invention;

5 is a schematic diagram of a logical structure of a network device according to an embodiment of the present invention;

6 is a schematic diagram of a logical structure of a terminal according to an embodiment of the present invention;

7 is a schematic diagram of a hardware structure of a network device according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.

detailed description

As described in the background art, in the NR technology, system frequency resources are divided into at least one bandwidth resource, that is, BWP. The network device can select a BWP with a better channel condition to schedule to the terminal to communicate with the terminal. If a BWP with a better channel condition exists, the system expects more flexibility in switching the BWP for the terminal.

The network device configures BWP for the terminal through Radio Resource Control (RRC). Specifically, the network device can configure the terminal with an initial BWP or a first active BWP through RRC. Further, when the network device expects to switch the BWP for the terminal, there are two ways:

One way is for the network device to configure a new BWP for the terminal through system signaling, such as RRC, and the terminal uses the new BWP as the currently valid BWP to complete the BWP handover. The method for network equipment configuration through RRC can be performed through the RRC reconfiguration process.

Another way is for the network device to dynamically notify the terminal to perform BWP handover through downlink control signaling, such as downlink control information (DCI) carried in a physical downlink control channel (PDCCH).

However, the uplink transmission mode and SRS and other information are independently configured in each BWP, so there may be inconsistent uplink transmission mode or SRS configuration information on the BWP to be switched to indicated in the currently activated BWP and DCI. Therefore, the terminal cannot determine how to parse the corresponding uplink transmission mode or SRS configuration information in the current DCI, so that the BWP cannot be smoothly switched, and uplink transmission cannot be performed.

An embodiment of the present invention provides a technical solution. When a network device sends a bandwidth resource indicated by bandwidth resource instruction information to a terminal to a bandwidth resource that is different from a currently activated bandwidth resource, the terminal can correctly parse downlink control information, thereby achieving smoothness. Switch the purpose of BWP for uplink transmission.

To put it simply, when the embodiment of the present invention sends downlink resource instruction information for the terminal to instruct the terminal to perform BWP handover through downlink control information, the network device may perform uplink transmission mode or SRS-related configuration information on the indicated bandwidth resource, and the downlink Control the other indication information carried in the control information to avoid some contradictions or ambiguities so that the terminal can correctly analyze the bandwidth resource indication information; or for the terminal side, it receives the bandwidth resources sent by the network device through the downlink control information. When indicating the information, the downlink control information terminal performs analysis in an unambiguous analysis manner. In this way, the purpose of smoothly switching BWP and then performing uplink transmission is achieved.

The technical solution provided by the present invention is described in detail below with reference to the drawings and specific embodiments. Before starting the description, some technical characteristics that may be involved in the embodiments of the present invention are briefly introduced.

Bandwidth resources

In general, the definition of bandwidth resources can refer to the definition of the bandwidth part in the NR technical standard currently under discussion. The bandwidth part can be a set of continuous physical resource blocks (PRBs) in the frequency domain. ), And the bandwidth of the bandwidth part is less than or equal to the maximum bandwidth supported by the user equipment (UE). The bandwidth part may include the following attributes, for example, system configuration parameters, user equipment-related configuration parameters, frequency location, and bandwidth.

The bandwidth resource may also be referred to as a frequency resource part, a part of a frequency resource, a carrier bandwidth part, or another name, which is not limited in this application. When the bandwidth resource is a continuous resource in the system frequency resource, the bandwidth resource may also be called a subband, a narrowband, or another name, and the specific form of the bandwidth resource is not limited in the embodiment of the present invention.

For different bandwidth resources, take bandwidth resource A and bandwidth resource B as examples. The differences between bandwidth resource A and bandwidth resource B include:

Some or all frequency resources included in bandwidth resource A are not included in bandwidth resource B, or some or all frequency resources included in bandwidth resource B are not included in bandwidth resource A.

Exemplarily, in a communication system based on orthogonal frequency division multiple access (Orthogonal FDMA, OFDMA), the difference between the bandwidth resource A and the bandwidth resource B may be:

At least one subcarrier included in the bandwidth resource A is not included in the bandwidth resource B, or at least one subcarrier included in the bandwidth resource B is not included in the bandwidth resource A.

Or the frequency domain resources of bandwidth resource A and bandwidth resource B completely overlap, but the frame structure (such as the subcarrier interval or CP length) is different.

The frequency domain resources of the bandwidth resource A and the bandwidth resource B may completely overlap, partially overlap, or not overlap.

Bandwidth resources can also be divided into uplink BWP and downlink BWP. Among them, the downlink BWP is used for downlink communication transmission, and the content of the transmission includes downlink channels and signals. The uplink BWP is used for uplink communication transmission and the content of transmission. Including uplink channels and signals. On a serving cell or carrier, a terminal may be configured with one or more BWPs. For example, a terminal within a serving cell or carrier supports up to 4 BWPs. Specifically, in a serving cell or carrier, a terminal supports a maximum of 4 uplink BWPs and / or 4 downlink BWPs.

Bandwidth resources in active state

In this article, the active bandwidth resource (active BWP) refers to the BWP that is in the active state. Usually the active state is relative to the time unit. The active BWP in this article can be divided into three types:

One is the initial active state BWP (active BWP), which is usually used to transmit BWP during the initial access phase. The initial active BWP can be obtained through system messages and broadcast messages, and its configuration is obtained through high-level signaling.

One is the first active state BWP (first active BWP). The corresponding upstream and downstream first active BWP can be obtained by configuring the BWP in the RRC message. When the network device configures the BWP, one or more BWPs can be designated as the first active BWP Then, when receiving the instruction message, the terminal sets the BWP or BWPs as active until the terminal receives the bandwidth resource instruction information to instruct the terminal to switch the current BWP.

The currently active bandwidth resource (active BWP) refers to the BWP that is active in the current time unit, and is also the BWP that is in effect before the next effective BWP.

Effective bandwidth resources

The BWP that is in effect can be used for uplink and downlink transmission; the BWP that is currently in effect, that is, the BWP that is in effect in the current time unit, may replace the BWP in effect in the previous time unit, or it may be in effect in the previous time unit BWP continues to take effect in this time unit, of course, the effective BWP is activated.

DCI format

The DCI formats mentioned in this article are divided into the following types:

1) The uplink authorized DCI includes DCI in fallback mode and DCI in normal mode, which are usually called DCI format 0_0 and DCI format 0_1.

Among them, DCI format 0_0 is the indicated PUSCH information based on a single antenna transmission; DCI format 0_1 is the indicated physical uplink shared channel (PUSCH) of the allowed uplink multiple input multiple output (MIMO). information;

2) The downlink authorized DCI includes the DCI in the fallback mode and the DCI in the normal mode, which are generally called DCI format 1_0 and DCI format 1_1.

Among them, DCI format 1_0 is the indicated physical downlink shared channel (PDSCH) information based on single antenna transmission; DCI format 1_1 is the indicated PDSCH information that allows uplink MIMO.

3) DCI 2_x is usually used for group scheduling, and can be used to indicate information of multiple terminals, such as PUSCH, physical uplink control channel (PUCCH), or channel sounding reference signal (Sounding reference signal, SRS) or power control information. Among them, x can take values of 0, 1, 2, 3, etc., which respectively represent different functions.

The uplink transmission can be indicated by the uplink authorized DCI. There are two types of uplink transmission modes (mainly uplink MIMO modes) in 5G systems:

One is based on codebook (CB) transmission;

The other is non-codebook based (NCB) transmission.

DCI format 0_0 is the indicated PUSCH transmitted by a single antenna, so it is not necessary to distinguish between codebook or non-codebook PUSCH transmission. The DCI format 0_1 can be used to indicate related information of the PUSCH based on codebook-based transmission or non-codebook-based transmission.

Whether the PUSCH is based on codebook transmission or non-codebook based transmission can be configured through RRC messages, and the RRC configuration information can be configured for each BWP. That is, the uplink transmission modes on different BWPs may be different, or one or more BWPs may not be configured with an uplink transmission mode. In this way, there is no BWP configured with an uplink transmission mode. According to the above, only uplink data can be scheduled through DCI 0_0.

DCI's SRI domain and SRS request domain

The DCI includes multiple indication information, such as channel sounding reference information indication information or channel sounding reference signal request information; the sounding reference information indication information is used to indicate the SRS identifier (SRS), indicating the SRI domain; the channel sounding reference signal request information It is used to indicate the SRS request (request), which is expressed as the SRS request field.

It should be noted that whether it is based on codebook (CB) or non-codebook (NCB) transmission and the number of SRSs configured, it may affect the number of bits in the SRI domain in DCI.

Wherein, during CB transmission, the SRI domain in the DCI is

Bit, where N _SRS is the number of SRS resources in the set of SRS resources configured for CB transmission;

During NCB transmission, the SRI field in the DCI is

Bit, N _SRS is the number of SRS resources in the set of SRS resources configured for NCB transmission;

Is the maximum number of layers supported by the transmission PUSCH.

The state corresponding to the value of the SRS request field may indicate that the terminal does not send SRS or SRS. The SRS refers to a pre-configured SRS that has a corresponding relationship with the SRS request field in DCI.

Because the uplink transmission mode and SRS configuration information on each BWP are independently configured, the current BWP and the configuration information on the BWP to be switched to indicated in the DCI may be inconsistent, resulting in the terminal being unable to determine the current How to interpret the corresponding SRI domain or SRS request domain in DCI, and it is also impossible to determine what beam the PUSCH transmission beam should be based on. The technical solution of the embodiment of the present invention is to solve this technical problem.

The technical solutions provided by the embodiments of the present invention are described in detail below.

FIG. 2 is an exemplary diagram of a wireless communication network 200 according to an embodiment of the present invention. As shown in FIG. 2, the wireless communication network 200 includes base stations 202 to 206 and terminal devices 208 to 222, where the base stations 202 to 206 can communicate with each other through a backhaul link (such as a straight line between the base stations 202 to 206 between each other). (Shown) for communication, the backhaul link can be a wired backhaul link (for example, optical fiber, copper cable), or a wireless backhaul link (for example, microwave). The terminal devices 208 to 222 can communicate with the corresponding base stations 202 to 206 through a wireless link (as shown by the polyline between the base stations 202 to 206 and the terminal devices 208 to 222).

The base stations 202-206 are used to provide wireless access services for the terminal devices 208-222. Specifically, each base station corresponds to a service coverage area (also referred to as a cell, as shown by the oval areas in FIG. 2). Terminal equipment entering the area can communicate with the base station through wireless signals to accept the base station. Provided wireless access services. There may be overlap between the service coverage areas of the base stations, and the terminal equipments within the overlapped area can receive wireless signals from multiple base stations, so these base stations can cooperate with each other to provide services to the terminal equipment. For example, multiple base stations may use Coordinated Multipoint (CoMP) technology to provide services to terminal equipment located in the overlapping area. For example, as shown in FIG. 2, the service coverage areas of the base station 202 and the base station 204 overlap, and the terminal device 222 is within the overlapping area, so the terminal device 222 can receive the wireless signals from the base station 202 and the base station 204. The base station 202 and the base station 204 can cooperate with each other to provide services to the terminal device 222. As another example, as shown in FIG. 2, the service coverage areas of the base station 202, the base station 204, and the base station 206 have a common overlapping area, and the terminal device 220 is within the overlapping area. Therefore, the terminal device 220 can receive the data from the base station. For the wireless signals of 202, 204, and 206, the

base stations

202, 204, and 206 can cooperate with each other to provide services to the terminal device 220.

Depending on the wireless communication technology used, the base station may also be referred to as Node B, evolved Node B (eNodeB), and access point (Access Point, AP). In addition, according to the size of the service coverage area provided, base stations can be divided into macro base stations for providing macro cells, micro base stations for providing pico cells, and femto cells (for providing femto cells). Femtocell). With the continuous evolution of wireless communication technology, future base stations may also adopt other names.

The terminal devices 208 to 222 can be various wireless communication devices with wireless communication functions, such as, but not limited to, mobile cellular phones, cordless phones, Personal Digital Assistants (PDAs), smart phones, notebook computers, tablet computers, wireless Data card, wireless modem (Modulator, modem) or wearable device such as smart watch. With the rise of the Internet of Things (IoT) technology, more and more devices that did not previously have communication functions, such as, but not limited to, household appliances, vehicles, tools and equipment, service equipment, and service facilities, have begun to deploy wireless The communication unit obtains the wireless communication function, so that it can access the wireless communication network and accept remote control. Such devices are equipped with a wireless communication unit and have wireless communication functions, so they also belong to the category of wireless communication devices. In addition, the terminal devices 208 to 222 may also be referred to as mobile stations, mobile devices, mobile terminals, wireless terminals, handheld devices, clients, and so on.

The base stations 202 to 206 and the terminal devices 208 to 222 can be configured with multiple antennas to support MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) technology. Further, the base stations 202 to 206 and the terminal devices 208 to 222 can support single-user MIMO (SU-MIMO) technology, as well as multi-user MIMO (MU-MIMO). Among them, MU-MIMO can be implemented based on Space Division Multiple Access (Space Division Multiple Access, SDMA) technology. With multiple antennas configured, the base stations 202-206 and terminal equipment 208-222 can also flexibly support Single Input Single Output (SISO) technology, Single Input Multiple Output (SIMO), and Multiple Input Single-input (Single output, MISO) technology to implement various diversity (such as but not limited to transmit diversity and receive diversity) and multiplexing technologies, where the diversity technology can include, for example, but not limited to, transmit diversity (TD) Technology and receive diversity (Receive Diversity, RD) technology, the multiplexing technology can be spatial multiplexing (Spatial Multiplexing) technology. In addition, the above-mentioned various technologies may also include multiple implementation schemes. For example, the transmit diversity technology may include, for example, but not limited to, Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity, SFTD), Time Switched Transmit Diversity (TSTD), Frequency Switched Transmit Diversity (FSTD), Orthogonal Transmit Diversity (OTD), Cyclic Delay Diversity (CDD) ) Equal diversity methods, and the diversity methods obtained by deriving, evolving, and combining the above-mentioned various diversity methods. For example, the current LTE (Long Term Evolution) standard uses transmission diversity methods such as Space Time Block Coding (STBC), Space Frequency Block Coding (SFBC), and CDD. The general description of transmit diversity has been described above by way of example. Those skilled in the art should understand that, in addition to the above examples, transmit diversity includes other multiple implementations. Therefore, the above description should not be understood as a limitation on the technical solution of the present invention, and the technical solution of the present invention should be understood as being applicable to various possible transmit diversity schemes.

In addition, the base stations 202 to 206 and the terminal devices 208 to 222 can communicate using various wireless communication technologies, such as, but not limited to, Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access, Frequency Division Multiple Access, FDMA) technology, Code Division Multiple Access (CDMA) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Orthogonal Frequency Division Multiple Access (Orthogonal FDMA, OFDMA) ) Technology, single carrier frequency division multiple access (Single Carrier FDMA (SC-FDMA) technology, space division multiple access (Space division multiple access (SDMA) technology, and evolution and derivative technologies of these technologies, etc.). The above wireless communication technologies have been adopted as wireless access technologies (Radio Access Technology, RAT) by many wireless communication standards, thereby constructing various wireless communication systems (or networks) that are widely known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by the 802.22 series of standards, Worldwide Interoperability for Microwave Access (WiMAX), long-term evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-Advanced), and evolved systems of these wireless communication systems. Unless otherwise specified, the technical solutions provided by the embodiments of the present invention can be applied to the foregoing various wireless communication technologies and wireless communication systems. In addition, the terms "system" and "network" may be used interchangeably.

It should be noted that the wireless communication network 200 shown in FIG. 2 is only used as an example, and is not used to limit the technical solution of the present invention. Those skilled in the art should understand that in the specific implementation process, the wireless communication network 200 may also include other devices, and the number of base stations and terminal devices may also be configured according to specific needs.

FIG. 3 is an exemplary flowchart of a method 300 for instructing bandwidth resource switching according to an embodiment of the present invention. In a specific implementation process, the method 300 may be executed by a network device, and the network device may be, for example, but not limited to, the base stations 202 to 206 shown in FIG. 2.

Step 302: The network device sends bandwidth resource configuration information to the terminal. The bandwidth resource configuration information carries an initial bandwidth resource or a bandwidth resource in a first activation state. The meaning of the initial bandwidth resource or the bandwidth resource in the first activation state is described above. It has been described in detail and will not be repeated here.

Specifically, the bandwidth resource configuration information is sent to the terminal through high-level configuration signaling such as RRC. The RRC message may carry indication information of an initial BWP or a first active state BWP (first active BWP), and is used for The terminal configures its available BWP. For example, through an RRC message, a network device may configure a terminal with up to 4N uplink (UL) BWPs and / or 4N downlink (DL) BWPs, where N is a non-zero positive integer, For example, N can be 1,2,3,4 and so on.

RRC signaling belongs to Layer 3 signaling, which is usually some control messages. The sending cycle or control cycle of L3 signaling is usually long, which is suitable for sending some information that does not change frequently. For example, in some existing communication standards, L3 signaling is usually used to carry some configuration information. The above-mentioned bandwidth resource configuration information may also be sent through layer 3 signaling other than RRC signaling.

Step 304: The network device sends downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate a bandwidth resource identifier (Bandwidth Part Indicator) to instruct the terminal to perform bandwidth resource switching. operating.

Optionally, before the network device sends the downlink control signaling to the terminal, the network device obtains the bandwidth resource instruction information carried in the downlink control signaling sent by the other network device to the terminal, or the network device sends it to the downlink of the terminal. Notify other network devices of the bandwidth resource instruction information carried in the control signaling; or after the network device sends the downlink control signaling to the terminal, the network device sends the bandwidth resource instruction information carried in the downlink control signaling sent to the terminal Notify other network devices; through such a negotiation process, the bandwidth resource indicated by the bandwidth resource instruction information sent by the network device is the same as the bandwidth resource indicated by the bandwidth resource instruction information carried in the downlink control signaling sent by the other network device to the terminal . Of course, the network device may send the downlink control signaling without negotiating with other network devices. If the terminal device complies with the bandwidth resource instruction information carried by the downlink control signaling sent by the network device, it will switch the bandwidth resource to its indicated bandwidth resource according to the identifier of the bandwidth resource, and feedback a positive response to it, and A negative response is fed back to another network device, or the terminal reports to another network device that it will switch, or will soon switch, or the identity of the bandwidth resource after the switch. If the terminal device does not follow the indication of the bandwidth resource instruction information carried by the downlink control signaling sent by the network device, the network device may receive a negative response from the terminal, or switch to the terminal after receiving further feedback from the terminal, or The handover, or the identifier of the bandwidth resource after the handover. This network device may also receive from other network devices the terminal will switch, or will soon switch, or the identity of the bandwidth resource after the switch.

The downlink control signaling herein may be downlink control information.

Specifically, if there is a bandwidth resource with better channel conditions within the system bandwidth and the network device wants the terminal to switch to a bandwidth resource with better channel conditions to communicate with it, it can dynamically notify the terminal to perform the BWP switch by using downlink control information.

It should be noted that the current activation state of the BWP must be configured with an uplink transmission mode and SRS; otherwise, according to the previous description, the network device cannot use DCI 0_1 to instruct the terminal to perform BWP handover.

When the network device sends the bandwidth resource instruction information to the terminal through the downlink control information, the BWP indicated by the bandwidth resource instruction information needs to configure the uplink transmission mode and SRS. Otherwise, the network device can only schedule the terminal through DCI0_0. When the terminal is instructed to perform BWP handover, the network device cannot perform handover through downlink control information after the terminal switches the BWP, which affects the flexibility of system performance.

If the bandwidth resource indicated by the foregoing bandwidth resource instruction information is not configured with an uplink transmission mode or is not configured with an SRS, the network device also needs to carry transmission instruction information in the downlink control information to indicate that it is a single antenna transmission. The terminal can only be scheduled through DCI 0_0.

Here, the transmission instruction information is antenna port instruction information, and the antenna port instruction information indicates one antenna port; or the transmission instruction information is precoding instruction information, and the precoding instruction information includes a transmission rank instruction or a precoding matrix. , The value of the rank indicated by the transmission rank is 1, or the precoding matrix is a matrix of 1 × 1 dimension, and the content of the matrix is [1].

The method described above is to set the transmission instruction information of the network device to achieve the purpose of allowing the terminal to transmit on a single antenna port. Another possible implementation is that the bandwidth resource indicated by the foregoing bandwidth resource instruction information is If no uplink transmission mode or channel sounding reference signal is configured, no matter how the terminal sends the uplink shared channel, the network device receives the uplink shared channel on a single antenna port.

For another example, on the bandwidth resources indicated by the foregoing bandwidth resource indication information, if no channel sounding reference signal is configured, the DCI also carries SRI request information, and the channel sounding resource request information instructs the terminal not to send channel sounding resources. Because, at this time, the terminal has no SRS resource configuration on the indicated BWP.

Specifically, specifically, the SRS request information is represented as an SRS request field, and the status corresponding to the value of the SRS request field may indicate that the terminal does not send SRS or send SRS. The SRS refers to a pre-configured SRS request in DCI The SRS domain has a corresponding relationship. When there is no resource configuration on the indicated BWP, the value of the SRS request domain can only be a state corresponding to whether the SRS is not sent. The SRS request field can be Xbit. One value of this field is a state. For example, the first state indicates that the terminal does not send SRS, the second state indicates that the terminal sends the first SRS, and the third state indicates that the terminal sends the second SRS. The fourth state indicates that the terminal sends the third SRS, and at this time, the value should correspond to the first state.

For example, the SRS request field is 2 bits, 00 means that SRS is not sent, 01 means that the first SRS is sent, 10 means that the second SRS is sent, and 11 means that the third SRS is sent. If you want to instruct the terminal not to send channel detection resources, at this time The SRS request field should be set to 00. Of course, this is only an example, and the bit information indicating that the terminal does not send the channel sounding resource may also be in other forms.

On the bandwidth resource indicated by the bandwidth resource indication information, if the uplink transmission mode and SRS are configured, the network device can schedule the terminal in the DCI 0_1 mode.

In the embodiment of the present invention, when the downlink control information is used to send the bandwidth resource indication information to the terminal, the network device may perform the uplink transmission mode and the SRS-related configuration information on the indicated bandwidth resource, and other indication information carried in the downlink control information. Some constraints. So that when the terminal parses the downlink control information, there is no ambiguity, so as to determine whether to perform BWP handover, so as to achieve the purpose of correctly performing uplink transmission.

The above description is the description of the operation when the network device instructs the terminal to perform BWP handover through the downlink control information. The following describes how to parse the downlink control information and its carry when the terminal receives the downlink control information of the network device and the bandwidth resource indication information it carries Of bandwidth resource instructions and how to perform BWP switching operations.

FIG. 4 is an exemplary flowchart of a bandwidth resource switching method 400 according to an embodiment of the present invention. In a specific implementation process, the method 400 may be executed by a receiving end device, which may be, for example, but not limited to, the terminal devices 208 to 222 shown in FIG. 2.

Step 402: The terminal receives downlink control information, and the downlink control information carries bandwidth resource indication information.

Optionally, before step 402, the terminal has obtained the configuration information of the bandwidth resource through a series of passes such as uplink synchronization and downlink synchronization in step 401. For example, the network device sends the bandwidth resource configuration information to the terminal device through a system message and a broadcast message. The terminal device selects the corresponding BWP as the initial BWP (first active BWP) or the first active state BWP configured according to the bandwidth resource configuration information. The BWP is currently in effect and uplink transmission is performed on the BWP. The uplink synchronization and downlink synchronization processes are well known to those skilled in the art and will not be repeated here.

When a network device is configured with a BWP, one or some BWPs can be designated as the first BWP. Then, when the terminal receives the indication message, it sets the BWP or BWPs as the active BWP, which is the BWP that is currently in effect, until the terminal receives the bandwidth resource indication information that instructs to switch the current BWP.

It should be noted that the currently activated BWP refers to a BWP that takes effect in the current time unit i. On the active BWP, the terminal can receive and send signals. On resources other than the active BWP, in general, the terminal does not send or receive signals. A special case is that the terminal may be allowed in the current active BWP resource range. Perform radio resource management measurements outside.

A BWP that is active in a certain time unit can notify the BWP switchover through DCI during the communication process.

Here, the granularity of a time unit may be referred to as a time unit. The time unit is used to represent a time unit in the time domain, and may be, for example, one or more of a sampling point, a symbol, a mini time slot, a time slot, a subframe, or a radio frame. The time unit information may include the type, length, or structure of the time unit. Optionally, the time unit can be understood as a time domain unit for resource scheduling.

Further, in the current time unit, the terminal device may receive more than one downlink control signaling, and the downlink control signaling may be used for uplink or downlink authorization. If the terminal receives multiple uplink bandwidth resource indication information in the current time unit, or the terminal receives multiple downlink bandwidth resource indication information in the current time unit, or the terminal receives multiple uplink bandwidth resource indication information and its uplink bandwidth resource indication information If the time unit indicated by the downlink control signaling is consistent, or the terminal receives multiple downlink bandwidth resource indication information and the time unit indicated by the downlink control signaling where the downlink bandwidth resource indication information is located, the terminal device does not expect to receive The bandwidth resources indicated by the multiple pieces of bandwidth resource instruction information obtained are different; or, if the multiple pieces of bandwidth resource instruction information are different, the terminal device takes one of the pieces of instruction information as the standard.

Step 404: The terminal determines the indicated bandwidth resource according to the bandwidth resource indication information.

In the same time unit, the terminal device may receive more than one downlink control signaling, and the terminal device does not expect to receive different bandwidth resources indicated by the multiple bandwidth resource indication information, that is, multiple bandwidths received by the terminal device The bandwidth resources indicated by the resource indication information should be the same, that is, the bandwidth resources indicated by multiple bandwidth resource indication information sent by multiple network devices to the terminal device are the same. The bandwidth resources indicated by multiple bandwidth resource instruction information sent by multiple network devices are the same, and can refer to network devices located in multiple cells on the same frequency, or network devices located in the same cell send multiple bandwidth resource instruction information. These bandwidths The bandwidth resources indicated by the resource indication information are the same; or they are not in the same cell, or multiple network devices in cells with different frequencies are negotiated, and the multiple bandwidth resource indication information sent uses the frequency of the same bandwidth location. Domain resources.

The process of sending, by the multiple network devices, the bandwidth resource indication information indicating the frequency domain resources of the same bandwidth location to the terminal through negotiation is specifically:

Interaction information between network devices. The exchanged information includes bandwidth resource indication information (for example, BWP indication information), and the time at which the network device will send the bandwidth resource indication information to the terminal is also sent to other network devices, such as the network devices negotiate. In a certain time unit, for example, slot n sends DCI to indicate the same bandwidth resource, such as BWP (y). The network then sends the DCI according to the interactive information, and the DCI carries the bandwidth resource indication information or further includes the time when the bandwidth resource indication information is sent.

It should be noted that the frequency domain resources referred to here are a resource block (RB), a resource block group (RBG), a predefined subband, or a frequency band (band). It is either a bandwidth part (BWP), a component carrier (CC), or a cell. The cell mentioned here may be a service cell.

As mentioned earlier, the downlink control signaling may be the DCI carried in the PDCCH. Multiple downlink control signaling can be sent using the same or different frequency domain resources.

Taking the frequency domain resource as a cell as an example, to determine whether multiple downlink control signaling is sent using the same frequency domain resource, you can determine whether the multiple downlink control signaling comes from the same cell, that is, to determine the downlink control signal. Whether the corresponding PDCCH configuration is configured in the same cell configuration, or whether the PDSCH configurations scheduled by multiple downlink control signalings are configured in the same cell configuration.

Multiple downlink control signalings are sent using the same frequency domain resources, that is, from the same cell, the bandwidth resource identifiers indicated by multiple bandwidth resource indication information indicated by multiple downlink control signaling are the same, that is, the bandwidth resources correspond The bandwidth locations are the same.

Multiple downlink control signaling is sent using different frequency domain resources, that is, from different cells. The bandwidth resource identifiers indicated by multiple bandwidth resource indication information indicated by multiple downlink control signaling may be different, but multiple bandwidths The bandwidth positions corresponding to the bandwidth resources indicated by the resource indication information are the same; wherein, the bandwidth positions are the same, including: the starting position of the bandwidth resource indicated by the plurality of bandwidth resource indication information is any two of the same. According to the start position and the size of the bandwidth, you can get the end position to get the bandwidth resource; or you can get the bandwidth resource according to the start and end position; or you can get the start position according to the band size and end position, so you know Bandwidth resources.

The starting positions of the bandwidth resources are the same, including the actual starting positions determined based on the frequency domain reference point and the offset. Taking the bandwidth resource as the BWP as an example, the starting position of the BWP is relative to the frequency domain reference point (for example, reference point A) in the serving cell, and the starting position of the BWP may be notified to the terminal by the network device. The same start position of the bandwidth resources indicated by the multiple bandwidth resource indication information may mean that the frequency domain reference points of the different serving cells are the same (K1 = K3), and the bandwidth resources indicated by the multiple bandwidth resource indication information The offset from the reference point in the frequency domain is the same (offset1 = offset2). Alternatively, the same starting positions may mean that the actual starting positions of the bandwidth resources determined based on the frequency domain reference point and the offset are the same. It can also be expressed as the difference between the frequency domain reference point difference between different serving cells and the offset of the bandwidth resource from the frequency domain reference point indicated by multiple bandwidth resource indication information of different serving cells. It is equal to zero to ensure that the actual starting positions of different bandwidth resources are the same.

One line of Table 1 shows the frequency domain units from small to large. The first line indicates that the position of pointA in the first serving cell is K1, and the actual starting position of BWP1 is determined by the position and offset of pointA, that is, K2 = K1 + offset. The second line indicates that the position of pointA in the second serving cell is K3, and the actual starting position of BWP2 is determined by the position and offset of pointA, that is, K4 = K3 + offset.

The difference between the position K1 of the reference point PointA of the first serving cell and the position K3 of pointA of the second serving cell is K1-K3 = -2; the value of the offset1 of the first serving cell is 5, and the second The value of offset 2 of the serving cell is 3; the difference between the offset 1 of the first serving cell and the offset 2 of the second serving cell is 5-3 = 2. The sum of the two is -2 + 2 = 0, which indicates the actual starting position of BWP1 in the first serving cell (K2 = K1 + offset1) and the actual starting position of BWP2 in the second serving cell (K4 = K3 + offset2) are equal.

The actual starting position of the BWP of the first serving cell is the same as the actual starting position of the BWP of the second serving cell.

Table 1

In addition, the start position or end position of the BWP mentioned here is the start position or end position after taking into account the parameter of the serving cell (numerology), that is, the start position or end position of the BWP is based on the numerology as a reference. The starting or ending position of the conversion. Numerology parameters can be used to determine subcarrier spacing, symbol length, CP length (cyclic prefix), and so on.

For example, if K1 = K3, if the numerology of the first serving cell is u1 and the numerology of the second serving cell is u2, then offset1 * (2 ^ u1) = offset2 * (2 ^ u2). For example, if u1 equals 0 corresponds to a subcarrier interval of 15k, and u2 equals 1 corresponds to a subcarrier interval of 30k, the granularity of the smallest unit in the frequency domain of the first serving cell is half that of the second serving cell. When the cell reference points are the same, in order to make the actual starting position of the BWP the same, the value of offset1 of the first cell is twice that of offset2. k means one thousand.

The bandwidth size is also referred to as a bandwidth size. The same bandwidth size means that the bandwidth size calculated based on numerology is the same. For example, the bandwidth of the BWP corresponding to the first serving cell is N1 RBs, the bandwidth of the BWP corresponding to the second serving cell is N2 RBs, and the subcarrier interval corresponding to the numerology u1 of the first serving cell is 15k * 2 ^ u1. The subcarrier interval corresponding to the numerology of the serving cell is 15k * 2 ^ u2, then N1 * 15k * 2 ^ u1 = N2 * 15k * 2 ^ u2.

In addition, the numerology corresponding to multiple indicated bandwidth resources may also be the same, that is, the numerology corresponding to the bandwidth resources indicated by different network devices is the same.

When the bandwidth resources indicated by the bandwidth resource indication information carried in multiple downlink control signaling are the same, the terminal may determine the indicated bandwidth resource according to any one or more of the bandwidth resource indication information, that is, select a bandwidth resource The bandwidth resource corresponding to the indication information is used as the indicated bandwidth resource. Then, a corresponding positive confirmation is fed back to the downlink control signaling selected by it, and a negative determination is fed back to other downlink control signaling. Further, the terminal may feedback the identifier of the selected bandwidth resource to other downlink control signaling to inform the corresponding network device of the bandwidth resource to which it is ready to switch.

In another case, at least two of the bandwidth resources indicated by the bandwidth resource indication information carried in multiple downlink control signaling are different.

Specifically, the network equipment interacts with the bandwidth resource configuration information respectively configured to the terminal, such as the BWP configuration information, specifically the start position, end position, and BWP size of the BWP, so that the network device can The indicated bandwidth resource information is used to determine the truly available bandwidth resources, and then each is indicated to the terminal.

In response to this situation, an implementation manner is that the terminal determines the intersection of the bandwidth resources indicated by the multiple bandwidth resource indication information as the indicated bandwidth resource.

That is, the terminal uses the starting position with the largest identified value among the starting positions corresponding to the bandwidth resources indicated by the multiple bandwidth resource indication information as the starting position of the indicated bandwidth resource; and / or Among the end positions corresponding to the bandwidth resources indicated by the plurality of bandwidth resource indication information, the end position with the smallest identified value is used as the end position of the indicated bandwidth resource.

To determine that the indicated bandwidth resource is a BWP as an example, the terminal uses the second or largest starting position of the identifier or index value among the actual starting positions corresponding to the bandwidth resources indicated by the multiple bandwidth resource indication information. As the start position of the BWP, the end position with the next smallest or smallest value of the identifier or index among the actual end positions corresponding to the bandwidth resources indicated by the multiple bandwidth resource indication information is used as the end position of the BWP.

As shown in Table 2 below, the actual starting position of the BWP at this time is max (K2, K4) = K4, and the actual ending position is max (K5, K6) = K5. Therefore, the indicated bandwidth resource determined by the terminal is a BWP composed of a frequency domain unit from the start position K4 to the end position K5.

Table 2

When the terminal determines the intersection of the bandwidth resources indicated by the multiple bandwidth resource instruction information as the indicated bandwidth resource, the network device receives the bandwidth resource instruction information (for example, an ID indicating a BWP) to the terminal, and then receives the terminal The feedback time of the network device may be a preset time period. Within the preset time period, if the terminal feeds back NACK, the network device considers that the bandwidth resource indicated by the terminal will not be used by the terminal as the handover bandwidth resource. In other words, the network equipment thinks that the terminal will not switch to the bandwidth resource indicated by itself. On the contrary, the network device thinks that the terminal will switch to the bandwidth resource indicated by itself.

Or, in another implementation, when multiple network devices send multiple bandwidth resource indication information to the terminal through downlink control signaling, if the multiple bandwidth resource indication information is different, the terminal device takes one of the bandwidth resource indication information as the standard.

The terminal device determines the indicated bandwidth resource according to the bandwidth resource instruction information carried in the downlink control signaling corresponding to the preset identifier. The preset identifier is a specified identifier of the control resource set corresponding to the downlink control signaling, or a minimum identifier of the control resource set, or a maximum identifier of the control resource set, or a certain control resource set group. An identifier, or the smallest identifier that controls the resource set group, or the largest identifier that controls the resource set group, or a certain identifier of the search space, or the smallest identifier of the search space, or the smallest identifier of the search space group.

For example, if multiple downlink control signalings are received in a time unit, the terminal device takes the downlink control signaling corresponding to the smallest identifier or the largest identifier among the DCI identifiers corresponding to the downlink control signals. For a DCI different from the BWP handover instruction that the terminal device complies with, the terminal device feeds back a negative acknowledgement (Negative acknowledgement, NACK). The identifier of the DCI may be an identifier of a CORESET or a CORESET group in which the DCI is located, or an identifier of a search space group and an identifier of a search space.

In another implementation, the terminal selects a bandwidth resource corresponding to the smallest bandwidth position indicated by the multiple bandwidth resource indication information, and determines it as the indicated bandwidth resource.

table 3

As shown in Table 3, in the bandwidth resource indication information carried by the three downlink control signalings from the first serving cell, the second serving cell, and the third serving cell, the indicated bandwidth resources are BWP1, BWP2, and BWP3, respectively. For the BWP3 of the third serving cell, the bandwidth position is the smallest of BWP1, BWP2, and BWP3, so the terminal uses BWP3 as the indicated bandwidth resource.

After selecting the bandwidth resource indication information carried by the downlink control signaling and determining the indicated bandwidth resource, the terminal feeds back an acknowledgement (ACK) to the network device corresponding to the selected downlink control signaling.

Further, the terminal may switch to a bandwidth resource corresponding to the compliant bandwidth resource instruction information after completing a negative response (NACK) to an indication of downlink control signaling other than the downlink control signaling selected by the terminal. Therefore, the bandwidth resource switching time can be defined. The bandwidth resource switching time refers to that the terminal starts switching after a predetermined time after receiving the downlink control signaling. The starting position of the bandwidth resource must ensure that another network device has After the feedback is completed, the handover is completed within another predetermined time, and the end position of the bandwidth resource should ensure that the network device knows that the terminal device has switched to the new bandwidth resource.

In addition to feeding back NACKs to other downlink control signaling, the terminal may also feedback to other downlink control signaling the identifiers of bandwidth resources that the terminal device will or will switch, such as the BWP identifier.

For example, the terminal device receives the DCI1 indication BWP1, the terminal device receives the DCI2 indication BWP2, and DCI1 and DCI2 are sent at the same time unit. The terminal device determines to switch to BWP1 according to a preset rule, and then the terminal device responds with a NACK to the non-compliant DCI scheduling. The terminal device can also use the feedback resource (PUCCH / PUSCH) corresponding to DCI2 to feedback to the network device corresponding to DCI2, such as TRP2, so that the resource that TRP2 corresponding to DCI2 can receive. The feedback information includes the information that the terminal device will switch to BWP1. . In this way, TRP2 knows that BWP2 indicated by the DCI2 that it sent is unsuccessful, and also allows TRP2 to know that the terminal device will switch to BWP1, or that TRP2 is instructed that the terminal device will switch to BWP1.

Regardless of whether the same bandwidth resources are sent and negotiated between the aforementioned network devices or the terminal only uses the bandwidth resources indicated by one of the bandwidth resource indication information, the final network device needs to know the bandwidth resources that the terminal can actually support and use Here, the bandwidth resources that the terminal can actually support or use are defined as the actual bandwidth resources.

The terminal does not expect to receive downlink signals (such as PDSCH, PDCCH, CSI-RS, etc.) outside the frequency domain resources corresponding to the actual bandwidth resources. In other words, the terminal will not receive downlink signals outside the frequency domain resources corresponding to the actual bandwidth resources. Correspondingly, when a network device schedules resources for a terminal, it can schedule signals that are within or beyond the actual bandwidth resource range supported by the terminal, but the network device should know that when the terminal receives the signal, it can only receive its signals. Signals within the supported actual bandwidth resource range will not be received by terminals that exceed the actual bandwidth resource range.

Correspondingly, the terminal cannot transmit uplink signals (such as PUSCH, PUCCH, SRS) outside the actual bandwidth resource range supported by the terminal. Therefore, when the network device schedules the uplink signal, the frequency domain resources of the scheduled uplink signal are within the range of the actual bandwidth resources supported by the terminal, that is, do not exceed the range of the actual bandwidth resources.

If the BWP indicated by the bandwidth resource instruction information is the same as the current active BWP, the terminal will not perform a BWP handover operation. In step 405, the terminal continues to perform uplink transmission according to the uplink transmission mode configuration on the currently active BWP and according to the SRS configuration information Perform SRS transmission.

Step 406: When the indicated bandwidth resource is different from a currently activated bandwidth resource, determine a currently effective bandwidth resource according to an uplink transmission mode or a configuration of a channel sounding reference signal on the indicated bandwidth resource.

It should be noted that the configuration of the uplink transmission mode or channel detection reference information on the indicated bandwidth resource refers to whether the indicated bandwidth resource is configured with an uplink transmission mode or SRS, and whether the uplink transmission mode or The number of configured SRSs or groups, and so on.

As mentioned above, each BWP is independently configured with an uplink transmission mode (such as the PUSCH transmission mode) or SRS. Therefore, when receiving the bandwidth resource indication information of a network device, the terminal first needs to interpret the bandwidth resource indication information. And according to the uplink transmission mode or the configuration of the channel sounding reference signal on the indicated bandwidth resource, it is then determined whether the BWP indicated by the network device is set to the currently valid BWP.

First, the terminal does not expect that when a network device instructs BWP handover through DCI, the indicated BWP is not configured with an uplink transmission mode, for example, no PUSCH transmission mode is configured, or SRS is not configured, because if no PUSCH transmission mode or SRS is configured on the BWP, Network devices are only allowed to schedule terminals through the DCI 0_0 format.

However, in actual implementation, when a network device instructs BWP switching through DCI, the uplink transmission mode or channel sounding reference signal configuration on the indicated bandwidth resource has the following three types:

The first case: no uplink transmission mode or channel sounding reference signal is configured on the indicated bandwidth resource; the first case specifically includes: no uplink transmission mode is configured; or no SRS is configured; or the uplink transmission mode is configured but not Configure SRS.

The second case: an uplink transmission mode is configured on the indicated bandwidth resource, and one or a group of channel sounding reference signals are configured;

The third case: an uplink transmission mode is configured on the indicated bandwidth resource, and at least two or at least two sets of channel sounding reference signals are configured.

For these three situations, the embodiments of the present invention provide different operation modes, so that the terminal can correctly analyze the bandwidth resource indication information for uplink transmission or SRS transmission.

In the first case, that is, when the uplink transmission mode is not configured on the BWP indicated by the bandwidth resource indication information received by the terminal or SRS is not configured, the terminal can have the following processing methods:

1. The terminal ignores the bandwidth resource indication information, including the following possible operation methods:

The terminal regards the bandwidth resource indication information as not being received;

Or, set the bandwidth resource indication information to be invalid;

Or, the bandwidth resource indication information is not processed for uplink signals or channel transmission, or is not analyzed;

Or, the terminal parses the bandwidth resource indication information, but does not process the parsed content;

Alternatively, other values are set as the values of the bandwidth resource indication information; the other values may be null, zero, or a value indicating that the bandwidth resource indication information is invalid.

In this way, the terminal does not set the indicated bandwidth resource as the currently effective bandwidth resource.

2. The terminal continues to set the initial BWP or the first activated state BWP to the currently valid BWP.

3. The terminal sends an uplink shared channel on the indicated bandwidth resource, and the airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel. The uplink control channel is PUCCH. The spatial information of the PUCCH is specifically the beam. Optionally, the terminal may send the PUSCH on the index or the beam that identifies the smallest PUCCH.

4. The terminal sends an uplink shared channel on the bandwidth resource in the currently activated state, and the airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel. The airspace information of the PUCCH is specifically a beam. Optionally, the terminal sends a PUSCH on the index or the beam with the smallest PUCCH identification.

Further, the downlink control information also carries channel sounding reference signal request information, and the terminal ignores the channel sounding reference signal request information.

Specifically, the terminal may consider the channel sounding reference signal request information as not being received;

Or, the channel sounding reference signal request information is set to invalid; the way to set the channel sounding reference signal request information to be invalid may be to set the bits of the SRS request field of the channel sounding reference signal request information to zero or null value, or Others indicate invalid values.

Or, the channel sounding reference signal request information is not processed or analyzed for uplink signals or channel transmission;

Alternatively, even if the terminal parses the channel sounding reference signal request information, the parsed content is not processed.

Further, the downlink control information also carries channel sounding reference signal indication information, and the terminal ignores the channel sounding reference signal indication information.

Specifically, the terminal may consider that the channel sounding reference signal indication information is not received, or set the channel sounding reference signal indication information to be invalid, and set the channel sounding reference signal indication information to be invalid. The method may be to indicate the channel sounding reference signal indication. The bits of the SRI field of the message are all set to zero or null value, or other values indicating invalid.

Or do not process the channel sounding reference signal indication information for uplink signals or channel transmission, or do not analyze it;

Alternatively, even if the terminal parses the channel sounding reference signal indication information, the parsed content is not processed.

According to the foregoing, when CB is transmitted, the SRI field in the DCI is

During NCB transmission, the SRI field in the DCI is

Is the maximum number of layers supported by the transmission PUSCH.

When there is no PUSCH configuration or SRS configuration on the bandwidth resource indicated by the bandwidth resource instruction information carried in the DCI sent by the network device to the terminal, regardless of the number of SRS resources indicated by the SRI field in the DCI, which one is indicated The SRS resource is ignored by the terminal, or the number of bits in the SRI domain carried in the DCI is set to 0, because the BWP indicated by the DCI does not have SRS resources configured at all.

Further, the terminal does not expect to receive transmission instruction information indicating that the non-single antenna is sent by the network device, or the terminal considers that the indicated BWP is a single antenna transmission. Specifically, the terminal does not expect to receive more than one antenna port indicated by the antenna port instruction information carried in the DCI sent by the network device, that is, regardless of the antenna port indicated by the antenna port instruction information at this time. If there is more than one, the terminal regards it as one. One implementation method is that the terminal uses the antenna port indicated by the antenna port instruction information as the first antenna port, and the number of the first antenna port is 1. The first antenna port may be a predefined value antenna port, such as the lowest antenna port or the highest antenna port; or the antenna port corresponding to the antenna port number configured through high-level signaling, and so on.

Further, the terminal does not expect to receive the information transmitted by the non-single antenna corresponding to the precoding indication information sent by the network device through the downlink control information, and the precoding indication information includes a transmission rank indication or a precoding matrix, regardless of the transmission rank indication What is the value of the terminal, the terminal regards the value of the transmission rank indication value as 1, or the terminal regards the precoding matrix as a 1 × 1 matrix regardless of the dimension of the precoding matrix. The content of this matrix is [1].

Further, because no SRS resource is configured on the indicated BWP of the terminal at this time, the terminal does not expect to receive the SRS request information sent by the network device through the downlink control information, which does not correspond to not sending SRS, that is, the terminal expects to receive the network device The SRS request information sent corresponds to not sending SRS. If the SRS request information corresponding to the received SRS is sent, the terminal ignores it or treats the bit in the SRS request field indicating the SRR request information as 0.

The SRS request field can be Xbit. One of the AND values is a state. For example, the first state indicates that the terminal does not send SRS, the second state indicates that the terminal sends the first SRS, and the third state indicates that the terminal sends the second SRS. The fourth state indicates that the terminal sends the third SRS, and at this time, the value should correspond to the first state.

For example, the SRS request field is 2 bits, 00 indicates that SRS is not sent, 01 indicates that the first SRS is sent, 10 indicates that the second SRS is transmitted, and 11 indicates that the third SRS is transmitted, and the terminal does not send channel detection resources. In this case, the SRS request field Should be set to 00. Of course, here is only an example, and the bit information of the channel sounding resource that the terminal does not send may also be in other forms.

For the second case, a PUSCH transmission mode is configured on the indicated BWP of the terminal, but there is only one SRS resource configuration;

According to the foregoing, during CB transmission, the SRI field bits in the DCI are

During NCB transmission, the SRI field bits in the DCI are

Is the maximum number of layers supported by the transmission PUSCH.

At this time, since there is only one SRS resource on the indicated BWP, the terminal should transmit according to the configured one SRS resource regardless of the CB mode or the NCB mode. Therefore, regardless of the number of SRS resources indicated by the SRI domain and which SRS resource is indicated, the terminal now considers that the information bits of the SRI indication domain are useless, and ignores the SRI domain in the DCI or does not perform the SRI. Parsing, or even if the SRI did the parsing, the content obtained by parsing is not processed. Alternatively, the terminal considers that the number of bits in the SRI field in the DCI is 0 or a null value, or another value indicating invalidity.

At this time, the terminal determines the SRS associated with the transmission PUSCH according to one SRS resource configured on the indicated BWP.

The terminal determines the beam information of the indicated SRS, which may be the downlink beam (such as the SSB, CSI-RS beam) or the uplink beam (such as the beam of other SRS) on the indicated BWP configured in the SRS, or Beams from other BWPs or carriers configured in this SRS.

For the third case: PUSCH transmission mode configuration on the indicated BWP of the terminal, and multiple SRS resource configurations;

In this case, the terminal determines a beam for transmitting the PUSCH according to the SRI domain carried in the DCI.

When the terminal interprets the SRI field in the DCI, if the number of bits required by the SRI field of the indicated BWP is greater than the number of bits in the SRI field of the current BWP, the terminal needs to perform a zero-padding operation on the bits of the SRI field in the current DCI until The number of bits in the SRI field is equal to the number of bits in the SRI field required by the indicated BWP.

If the number of bits in the SRI indication field of the indicated BWP is less than the number of bits in the SRI field in the DCI, the terminal ignores the high order bits in the SRI field in the DCI and reads only the low order bits of the number of bits required by the indicated BWP. .

Further, the terminal determines to transmit the SRS associated with the PUSCH according to the SRS configured on the indicated BWP. For example, if two SRSs are configured on the indicated BWP and a second SRS is indicated in the SRI field in the DCI, the terminal determines that the second SRS is among the two SRSs configured on the indicated BWP. Second SRS.

So far, except for the first case, the terminal determines the PUSCH transmission beam and SRS resources on the indicated BWP, and sets the BWP indicated by the bandwidth resource indication information carried in the DCI to the currently valid BWP. The PUSCH is sent on the BWP in effect.

When the embodiment of the present invention is implemented, when the terminal side receives the bandwidth resource indication information sent by the network device through the downlink control information, it analyzes the downlink control information terminal in an unambiguous analysis manner. In this way, the purpose of smoothly switching BWP and then performing uplink transmission is achieved.

The present invention further provides a network device and a terminal, which are respectively used to perform the method 300 for instructing bandwidth resource switching shown in FIG. 3 and the bandwidth resource switching method 400 shown in FIG. 4. The network equipment and terminal equipment are described in detail below.

FIG. 5 is a schematic diagram of a logical structure of a network device 500 according to an embodiment of the present invention. In a specific implementation process, the network device 500 may be, for example, but not limited to, the base stations 202 to 206 shown in FIG. 2. As shown in FIG. 5, the network device 500 includes a processing unit 502 and a sending unit 504.

In one implementation, the processing unit 502 is configured to configure bandwidth resource configuration information for the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a first effective bandwidth resource.

The sending unit 504 is configured to send the bandwidth resource configuration information to a terminal;

The sending unit 504 is further configured to send downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.

In another implementation, the network device further includes a receiving unit (not shown in the figure), configured to obtain bandwidth resource indication information carried in downlink control signaling sent by the other network device to the terminal, or the sending unit of the network device 504: Notify other network devices of the bandwidth resource instruction information carried in the downlink control signaling sent by the network device to the terminal.

The sending unit 504 is further configured to send downlink control signaling to the terminal, where the downlink control signaling carries bandwidth resource indication information; the bandwidth resource indicated by the bandwidth resource indication information and the bandwidth resource sent by other network devices to the terminal The bandwidth resources indicated by the bandwidth resource indication information carried in the downlink control signaling are the same. Specifically, the bandwidth resources indicated by multiple bandwidth resource indication information sent by multiple network devices are the same, and may refer to network devices located in multiple cells on the same frequency, or network devices located in the same cell send multiple bandwidth resource indication information , The bandwidth resources indicated by the bandwidth resource indication information are the same; or multiple network devices in different cells or cells in different frequencies are negotiated, and the multiple bandwidth resource indication information sent uses the same bandwidth Frequency domain resources for the location.

In another implementation, the sending unit 502 is configured to send downlink control signaling to the terminal, and the downlink control signaling carries bandwidth resource indication information; specifically, the network devices interact with each other to configure the bandwidth allocated to the terminal. Resource configuration information, such as BWP configuration information, specifically BWP start position, end position, BWP size, etc., so that network devices can determine the truly available bandwidth resources based on the bandwidth resource information that they and other network devices will indicate. Each terminal is then instructed to each terminal, and the bandwidth resources indicated by multiple network devices may not be exactly the same.

The receiving unit is further configured to receive an identifier of a bandwidth resource that is positively or negatively determined or switched to be sent to the terminal.

The network device 500 is configured to perform the method 300 for instructing bandwidth resource switching shown in FIG. 3 and the bandwidth resource sending method involved therein. The related technical features have been described in detail above in connection with the method 300 shown in FIG. 3, so I won't repeat them here.

FIG. 6 is a schematic diagram of a logical structure of a terminal 600 according to an embodiment of the present invention. In a specific implementation process, the terminal 600 may be, for example, but not limited to, the terminals 208 to 222 shown in FIG. 2. As shown in FIG. 6, the terminal 700 includes a receiving unit 602 and a processing unit 604.

In one implementation, the receiving unit 602 is configured to receive downlink control information, where the downlink control information carries bandwidth resource indication information.

A processing unit 604, configured to determine an indicated bandwidth resource according to the bandwidth resource indication information; and when the indicated bandwidth resource is different from a currently activated bandwidth resource, perform uplink transmission on the indicated bandwidth resource The configuration of the mode or channel sounding reference signal determines the currently effective bandwidth resources.

The terminal further includes a sending unit 606, and when no uplink transmission mode or channel sounding reference signal is configured on the indicated bandwidth resource, the sending unit 606 sends an uplink shared channel on the bandwidth resource in the currently activated state; Or the sending unit sends an uplink shared channel on the indicated bandwidth resource; the airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel.

In another implementation, the receiving unit 602 is configured to receive multiple downlink control signalings, where the downlink control signaling carries bandwidth resource indication information; the bandwidth resources indicated by the multiple bandwidth resource indication information are the same;

The processing unit 604 is configured to determine an indicated bandwidth resource according to the bandwidth resource instruction information.

In another implementation, the receiving unit 602 is configured to receive multiple downlink control signalings, where the downlink control signaling carries bandwidth resource indication information;

The terminal 600 is configured to perform the bandwidth resource switching method 400 shown in FIG. 4 and the bandwidth resource receiving method involved therein. Related technical features have been described in detail above in conjunction with the method 400 shown in FIG. More details.

FIG. 7 is a schematic diagram of a hardware structure of a network device 700 according to an embodiment of the present invention. As shown in FIG. 7, the network device 700 includes a processor 702, a transceiver 704, a plurality of antennas 706, a memory 708, an I / O (Input / Output) interface 710, and a bus 712. The transceiver 704 further includes a transmitter 7042 and a receiver 7044, and the memory 708 is further configured to store instructions 7082 and data 7084. In addition, the processor 702, the transceiver 704, the memory 708, and the I / O interface 710 are communicatively connected to each other through a bus 712, and a plurality of antennas 706 are connected to the transceiver 704.

The processor 702 may be a general-purpose processor, such as, but not limited to, a Central Processing Unit (CPU), or a special-purpose processor, such as, but not limited to, a Digital Signal Processor (DSP), an application Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), etc. In addition, the processor 702 may also be a combination of multiple processors. In particular, in the technical solution provided by the embodiment of the present invention, the processor 702 may be configured to perform, for example, the operation performed by step 302 in the method 300 shown in FIG. 3 and the processing unit 502 of the network device 500 shown in FIG. 5 . The processor 702 may be a processor specifically designed to perform the above steps and / or operations, or may be a processor that performs the above steps and / or operations by reading and executing instructions 7082 stored in the memory 708. The processor 702 Data 7084 may be required during the above steps and / or operations.

The transceiver 704 includes a transmitter 7042 and a receiver 7044, wherein the transmitter 7042 is configured to send a signal through at least one antenna among the multiple antennas 806. The receiver 7044 is configured to receive a signal through at least one antenna among the multiple antennas 706. Particularly, in the technical solution provided by the embodiment of the present invention, the transmitter 7042 may be specifically configured to be executed by at least one antenna among multiple antennas 706, for example, step 304 and method 5 in the method 300 shown in FIG. 3 The operations performed by the sending unit 504 of the network device 500 are shown.

The memory 708 may be various types of storage media, such as Random Access Memory (RAM), Read Only Memory (ROM), Non-Volatile RAM (NVRAM), Programming ROM (Programmable ROM, PROM), Erasable PROM (Erasable PROM, EPROM), Electrically Erasable PROM (Electrically Erasable PROM, EEPROM), flash memory, optical memory and registers, etc. The memory 708 is specifically configured to store instructions 7082 and data 7084. The processor 702 may execute the steps and / or operations described above by reading and executing the instructions 7082 stored in the memory 708, and perform the foregoing operations and / or steps. Data may be used in the process.

The I / O interface 710 is used to receive instructions and / or data from a peripheral device and output instructions and / or data to the peripheral device.

It should be noted that in the specific implementation process, the network device 700 may also include other hardware devices, which are not listed here one by one.

FIG. 8 is a schematic diagram of a hardware structure of a terminal 800 according to an embodiment of the present invention. As shown in FIG. 8, the terminal 800 includes a processor 802, a transceiver 804, a plurality of antennas 806, a memory 808, an I / O (Input / Output) interface 810, and a bus 812. The transceiver 804 further includes a transmitter 8042 and a receiver 8044, and the memory 808 is further used for storing instructions 8082 and data 8084. In addition, the processor 802, the transceiver 804, the memory 808, and the I / O interface 810 are communicatively connected to each other through a bus 812, and a plurality of antennas 806 are connected to the transceiver 804.

The processor 802 may be a general-purpose processor, such as, but not limited to, a Central Processing Unit (CPU), or a special-purpose processor, such as, but not limited to, a Digital Signal Processor (DSP), an application Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), etc. In addition, the processor 802 may be a combination of multiple processors. Particularly, in the technical solution provided by the embodiment of the present invention, the processor 802 may be configured to perform, for example, step 404 in the method 400 shown in FIG. 4 and operations performed by the processing unit 604 of the terminal 600 shown in FIG. 6. The processor 802 may be a processor specifically designed to perform the above steps and / or operations, or may be a processor that executes the above steps and / or operations by reading and executing instructions 8082 stored in the memory 808. The processor 802 Data 8084 may be needed during the steps and / or operations described above.

The transceiver 804 includes a transmitter 8042 and a receiver 8044, wherein the transmitter 8042 is configured to send a signal through at least one antenna among the multiple antennas 806. The transmitter 8042 is configured to transmit a signal through at least one antenna among the multiple antennas 806. Particularly, in the technical solution provided by the embodiment of the present invention, the transmitter 8042 is specifically configured to perform an operation performed by the sending unit 606 of the terminal 600 shown in FIG. 6 through at least one antenna among multiple antennas 806. The receiver 8044 is configured to receive a signal through at least one antenna among the multiple antennas 806. Particularly, in the technical solution provided by the embodiment of the present invention, the receiver 8044 is specifically configured to be executed by at least one antenna among multiple antennas 806. Step 402 in the method 400 shown in FIG. 4 and the terminal shown in FIG. 6 Operations performed by the receiving unit 602 of 600.

The memory 808 may be various types of storage media, such as Random Access Memory (RAM), Read Only Memory (ROM), Non-Volatile RAM (NVRAM), Programming ROM (Programmable ROM, PROM), Erasable PROM (Erasable PROM, EPROM), Electrically Erasable PROM (Electrically Erasable PROM, EEPROM), flash memory, optical memory and registers, etc. The memory 808 is specifically configured to store the instructions 8082 and data 8084. The processor 802 may execute the steps and / or operations described above by reading and executing the instructions 8082 stored in the memory 808, and perform the operations and / or steps described above. Data may be used in the process of 8084.

The I / O interface 810 is used for receiving instructions and / or data from a peripheral device and outputting instructions and / or data to the peripheral device.

It should be noted that, in the specific implementation process, the terminal 800 may also include other hardware devices, which will not be enumerated here one by one.

The technical solution provided by the embodiment of the present invention may be implemented by a processor + transceiver. The processor is configured to perform various processing operations, such as, but not limited to, generation, determination, judgment, search, extraction, acquisition, and reading. , Receive input data to be processed and output processed data and other operations, the transceiver is used to perform operations such as transmission and reception. In the specific implementation process, the processor can be implemented in the following ways:

In the first mode, the processor is a dedicated processor. In this case, the processor may further include an interface circuit and a processing circuit, where the interface circuit is configured to receive data that needs to be processed by the processing circuit, and output the processing of the processing circuit. As a result, the processing circuit is used to perform the various processing operations described above.

In the second manner, the processor is implemented by using a general-purpose processor + memory architecture. The general-purpose processor is configured to execute processing instructions stored in the memory, and these processing instructions are used to instruct the general-purpose processor to perform the foregoing various processing operations. It is not difficult to understand that the processing performed by the general-purpose processor depends on the processing instructions stored in the memory. By modifying the processing instructions in the memory, the general-purpose processor can be controlled to output different processing results.

Further, in the above-mentioned second manner, the general-purpose processor and the memory may be integrated on a same chip, for example, the general-purpose processor and the memory may be integrated on a processing chip. In addition, the general-purpose processor and the memory may also be provided on different chips, for example, the general-purpose processor is provided on a processing chip, and the memory is provided on a storage chip.

The technical solution provided by the embodiment of the present invention may also be implemented by means of a computer-readable storage medium, where the computer-readable storage medium stores processing instructions for implementing the technical solution of the embodiment of the present invention for reading by a general-purpose processing device. To complete the technical solution provided by the embodiment of the present invention. The above-mentioned general processing device should be understood as a processing device including necessary hardware devices such as a processor and a transceiver, and the operation of these hardware devices depends on the processing instructions stored in the computer-readable storage medium.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it 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 and executed on a computer, the processes or functions according to the embodiments of the present invention are wholly or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.

In summary, the above are only embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A method for switching bandwidth resources, which includes:

The terminal receives downlink control information, and the downlink control information carries bandwidth resource indication information;

Determining, by the terminal, the indicated bandwidth resource according to the bandwidth resource indication information;

When the indicated bandwidth resource is different from the currently activated bandwidth resource, the currently effective bandwidth resource is determined according to the uplink transmission mode or the configuration of the channel sounding reference signal on the indicated bandwidth resource.
The method of claim 1, wherein when no uplink transmission mode or channel sounding reference signal is configured on the indicated bandwidth resource, the terminal ignores the bandwidth resource indication information.
The method for switching bandwidth resources according to claim 1, wherein, when an uplink transmission mode or a channel sounding reference signal is not configured on the indicated bandwidth resource,

The terminal sets an initial bandwidth resource or a bandwidth resource in a first activation state as a currently effective bandwidth resource.
The method for switching bandwidth resources according to claim 1, wherein, when an uplink transmission mode or a channel sounding reference signal is not configured on the indicated bandwidth resource,

The terminal sends an uplink shared channel on the bandwidth resource in the currently activated state, and the airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel.
The method for switching bandwidth resources according to claim 1, wherein, when an uplink transmission mode or a channel sounding reference signal is not configured on the indicated bandwidth resource,

The terminal sends an uplink shared channel on the indicated bandwidth resource, and the airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel.
The method for bandwidth resource switching according to any one of claims 1 to 5, wherein the downlink control information further carries channel sounding reference signal request information, and the terminal ignores the channel sounding reference signal request information.
The method for bandwidth resource switching according to any one of claims 1 to 5, wherein the downlink control information further carries channel sounding reference signal indication information, and the terminal ignores the channel sounding reference signal indication information.
The method for bandwidth resource switching according to any one of claims 1 to 5, characterized in that the downlink control information further carries antenna port instruction information, and the terminal refers to the antenna port instruction information indicated by the antenna port instruction information. The antenna port serves as a first antenna port.
The method for bandwidth resource switching according to any one of claims 1 to 5, wherein the downlink control information further carries precoding indication information, and the precoding indication information includes a transmission rank indication or a precoding Matrix, the terminal takes the value of the rank indicated by the transmission rank as 1, and / or the precoding matrix as a matrix of 1 × 1 dimension.
The method for bandwidth resource switching according to claim 1, wherein when the indicated bandwidth resource is configured with an uplink transmission mode and a channel sounding reference signal is configured, the terminal uses the indicated bandwidth The resource is set to the currently effective bandwidth resource.
The method for bandwidth resource switching according to claim 10, wherein only one or a group of channel sounding reference signals are configured, and when the downlink control information carries channel sounding reference signal indication information, the terminal ignores all The channel sounding reference signal indication information is described.
The method of claim 11, wherein the terminal sends an uplink shared channel according to the one channel sounding reference signal or a group of channel sounding reference signals.
The method for switching bandwidth resources according to claim 10, wherein when at least two or at least two sets of the channel sounding reference signals are configured, and the downlink control information carries channel sounding reference signal indication information, the The terminal determines, from the at least two or at least two sets of channel sounding reference signals, a channel sounding reference signal resource indicated by the channel sounding reference signal indication information;

The terminal sends an uplink shared channel according to the determined channel sounding reference signal resource.
A method for instructing bandwidth resource switching, which comprises:

The network device sends bandwidth resource configuration information to the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a bandwidth resource in a first activation state;

The network device sends downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.
The method for instructing bandwidth resource switching according to claim 14, further comprising:

Configure an uplink transmission mode and / or a channel sounding reference signal on the bandwidth resource indicated by the bandwidth resource indication information.
The method according to claim 14, wherein when the bandwidth resource indicated by the bandwidth resource indication information is not configured with an uplink transmission mode or a channel sounding reference signal is not configured, the method The downlink control information also carries transmission instruction information, including antenna port instruction information or precoding instruction information.
The method according to claim 16, wherein the number of antenna ports indicated by the antenna port indication information is one.
The method for instructing bandwidth resource switching according to claim 16, wherein the precoding indication information comprises a transmission rank indication or a precoding matrix, and the value of the rank of the transmission rank indication is 1, or the precoding The matrix is a matrix of 1 × 1 dimensions.
The method according to claim 16, wherein the network device receives an uplink shared channel sent by a terminal on a single antenna port.
The method according to claim 14, wherein when the bandwidth resource indicated by the bandwidth resource indication information is not configured with an uplink transmission mode or a channel sounding reference signal is not configured, the method The downlink control information also carries channel sounding resource request information, and the channel sounding resource request domain indication information instructs the terminal not to send channel sounding resources.
A terminal, comprising:

A receiving unit, configured to receive downlink control information, where the downlink control information carries bandwidth resource indication information;

A processing unit, configured to determine an indicated bandwidth resource according to the bandwidth resource instruction information; and when the indicated bandwidth resource is different from a currently activated bandwidth resource, according to an uplink transmission mode on the indicated bandwidth resource Or the configuration of the channel sounding reference signal to determine the currently effective bandwidth resources.
The terminal according to claim 21, wherein when no uplink transmission mode or channel sounding reference signal is configured on the indicated bandwidth resource, the processing unit ignores the bandwidth resource indication information.
The terminal according to claim 21, wherein, when an uplink transmission mode or a channel sounding reference signal is not configured on the indicated bandwidth resource, the processing unit uses an initial bandwidth resource or a bandwidth resource in a first active state. Set to the currently active bandwidth resource.
The terminal according to claim 21, wherein the terminal further comprises a sending unit;

When no uplink transmission mode or channel sounding reference signal is configured on the indicated bandwidth resource, the sending unit sends an uplink shared channel on the bandwidth resource in the currently activated state; or the sending unit sends the uplink shared channel on the indicated bandwidth resource. The uplink shared channel on the bandwidth resource;

The airspace information of the uplink shared channel is determined according to the airspace information of the uplink control channel.
The terminal according to any one of claims 21 to 24, wherein the downlink control information received by the receiving unit further carries channel sounding reference signal indication information, and the processing unit ignores the channel sounding reference signal Instructions.
The terminal according to any one of claims 21 to 24, wherein the downlink control information received by the receiving unit further carries antenna port indication information, and the processing unit is configured to use the antenna port indication information The number of indicated antenna ports is taken as one.
The terminal according to claim 21 to 24, wherein the downlink control information received by the receiving unit further carries precoding indication information, and the precoding indication information includes a transmission rank indication or a precoding matrix, and The processing unit is configured to use a value of a rank indicated by the transmission rank as 1, or use the precoding matrix as a 1 × 1 matrix.
The terminal according to claim 21, wherein when the indicated bandwidth resource is configured with an uplink transmission mode and a channel sounding reference signal is configured, the processing unit sets the indicated bandwidth resource to Bandwidth resources currently in effect.
The terminal according to claim 28, wherein when one or a group of channel sounding reference signals are configured, the processing unit ignores the channel sounding reference signal indication information carried in the downlink control information.
The terminal according to claim 29, wherein the terminal further comprises a sending unit;

The sending unit sends an uplink shared channel according to the one or a group of channel sounding reference signals.
The terminal according to claim 28, wherein when at least two or at least two sets of the channel sounding reference signals are configured, the processing unit selects from the at least two or at least two sets of channel sounding reference signals, A channel sounding reference signal resource indicated by the channel sounding reference signal indication information carried in the downlink control information is determined.
The terminal according to claim 31, wherein the terminal further comprises a sending unit, and the sending unit sends an uplink shared channel at the processing unit according to the determined channel sounding reference signal resource.
A network device, comprising:

A processing unit configured to configure bandwidth resource configuration information for the terminal, where the bandwidth resource configuration information carries an initial bandwidth resource or a first effective bandwidth resource;

A sending unit, configured to send the bandwidth resource configuration information to a terminal;

The sending unit is further configured to send downlink control information to the terminal, where the downlink control information carries bandwidth resource indication information, and the bandwidth resource indication information is used to indicate an identifier of the bandwidth resource to instruct the terminal to perform a bandwidth resource switching operation.
The network device according to claim 33, wherein the processing unit is further configured to configure an uplink transmission mode and a channel sounding reference signal on a bandwidth resource indicated by the bandwidth resource indication information.
The network device according to claim 33, wherein when the processing unit does not configure an uplink transmission mode or a channel sounding reference signal on the bandwidth resource indicated by the bandwidth resource indication information, all the data sent by the sending unit The transmission instruction information carried in the downlink control information includes antenna port instruction information or precoding instruction information.
The network device according to claim 35, wherein there is one antenna port indicated by the antenna port indication information.
The network device according to claim 35, wherein the precoding indication information comprises a transmission rank indication or a precoding matrix, and the rank value of the transmission rank indication is 1, or the precoding matrix is 1 × 1-dimensional matrix.
The network device according to claim 33, wherein when the processing unit does not configure an uplink transmission mode or a channel sounding reference signal on the bandwidth resource indicated by the bandwidth resource indication information, all the data sent by the sending unit The downlink control information also carries channel detection resource request domain indication information, and the channel detection resource request domain indication information instructs the terminal not to send channel detection resources.
A method for receiving a bandwidth resource, comprising:

The terminal receives multiple downlink control signalings, and the downlink control signaling carries bandwidth resource indication information; the bandwidth resources indicated by the multiple bandwidth resource indication information are the same;

The terminal determines the indicated bandwidth resource according to the bandwidth resource indication information.
A terminal, comprising:

The transceiver is configured to receive multiple downlink control signalings, where the downlink control signaling carries bandwidth resource indication information; the bandwidth resources indicated by the multiple bandwidth resource indication information are the same;

A processor, configured to determine an indicated bandwidth resource according to the bandwidth resource indication information.
The method for receiving a bandwidth resource according to claim 39 or the terminal according to claim 40, wherein the plurality of downlink control signalings are sent using a same frequency domain resource.
The method for receiving a bandwidth resource according to claim 39 or the terminal according to claim 40, wherein the plurality of downlink control signalings are sent using different frequency domain resources.
The method or terminal for receiving a bandwidth resource according to claim 42, wherein the identifiers of the bandwidth resources indicated by the plurality of bandwidth resource indication information are the same.
The method or terminal for receiving bandwidth resources according to claim 42, wherein the identifiers of the bandwidth resources indicated by the plurality of bandwidth resource indication information are different, and the bandwidth positions corresponding to the bandwidth resources are the same.
The method or terminal for receiving a bandwidth resource according to claim 44, wherein the bandwidth locations are the same, comprising: at least two of a start position, a bandwidth size, and an end position of the bandwidth resource are the same.
The method or terminal for receiving a bandwidth resource according to claim 45, wherein the starting positions of the bandwidth resources are the same, including the actual starting positions determined based on a frequency domain reference point and an offset.
The method or terminal for receiving a bandwidth resource according to claim 45 or 46, wherein the end positions of the bandwidth resources are the same, including the end positions determined based on the start position and the bandwidth size are the same.
A method for receiving a bandwidth resource, comprising:

The terminal receives multiple downlink control signalings, and the downlink control signaling carries bandwidth resource indication information; the bandwidth resources indicated by the multiple bandwidth resource indication information are at least two different;

The terminal determines the indicated bandwidth resource according to the bandwidth resource indication information.
A terminal, comprising:

A transceiver, configured to receive multiple downlink control signalings, where the downlink control signaling carries bandwidth resource indication information; the bandwidth resources indicated by the multiple bandwidth resource indication information are at least two different;

A processor, configured to determine an indicated bandwidth resource according to the bandwidth resource indication information.
The method for receiving a bandwidth resource according to claim 48 or the terminal according to claim 49, wherein the determining the indicated bandwidth resource according to the bandwidth resource indication information comprises:

The terminal determines the intersection of the bandwidth resources indicated by the multiple bandwidth resource indication information as the indicated bandwidth resource.
The method or terminal for receiving bandwidth resources according to claim 50, wherein the determining, by the terminal, the intersection of the bandwidth resources indicated by the plurality of bandwidth resource indication information as the indicated bandwidth resources comprises:

The terminal uses the starting position with the largest identified value among the starting positions corresponding to the bandwidth resources indicated by the multiple bandwidth resource indication information as the starting position of the indicated bandwidth resource; or

The terminal uses, as the indicated end position of the bandwidth resource, the end position with the smallest identified value among the end positions corresponding to the bandwidth resources indicated by the multiple bandwidth resource indication information.
The method for receiving a bandwidth resource according to claim 48 or the terminal according to claim 49, wherein the determining the indicated bandwidth resource according to the bandwidth resource indication information comprises:

The terminal device selects any of the bandwidth indication information to determine an indicated bandwidth resource.
The method or terminal for receiving a bandwidth resource according to claim 52, wherein the terminal device selects any one of the bandwidth indication information to determine the indicated bandwidth resource, comprising:

The terminal device determines the indicated bandwidth resource according to the bandwidth resource indication information carried in the downlink control signaling corresponding to the preset identifier.
The method or terminal for receiving a bandwidth resource according to claim 53, wherein the preset identifier is a minimum identifier of a control resource set or a maximum identifier of a control resource set corresponding to the downlink control signaling, Or control the smallest identifier of the resource set group, or control the largest identifier of the resource set group, or the smallest identifier of the search space, or the smallest identifier of the search space group.
The method for receiving a bandwidth resource according to claim 52, wherein the terminal device selecting any one of the bandwidth indication information to determine the indicated bandwidth resource comprises:

The terminal selects a bandwidth resource corresponding to the smallest bandwidth position indicated by the plurality of bandwidth resource indication information, and determines it as the indicated bandwidth resource.
The method for receiving bandwidth resources according to any one of claims 52 to 55, wherein the terminal feeds back a negative confirmation to downlink control signaling other than downlink control signaling corresponding to the selected bandwidth indication information. .
The method for receiving bandwidth resources according to any one of claims 52 to 56, wherein the terminal feeds back the handover of the downlink control signaling other than the downlink control signaling corresponding to the selected bandwidth indication information. The identifier of the bandwidth resource.
A method for sending a bandwidth resource is characterized in that it includes:

The network device acquires the bandwidth resource indication information carried in the downlink control signaling sent by the other network equipment to the terminal, or the network device notifies the other network equipment of the bandwidth resource indication information carried in the downlink control signaling sent to the terminal by the network device;

The network device sends downlink control signaling to the terminal, and the downlink control signaling carries bandwidth resource indication information; the bandwidth resource indicated by the bandwidth resource indication information and the downlink control signaling carried by other network equipment to the terminal carry The bandwidth resources indicated by the bandwidth resource indication information are the same.
A network device, comprising:

A transceiver for acquiring bandwidth resource indication information carried in downlink control signaling sent by the other network device to the terminal, or for notifying other network equipment of bandwidth resource indication information carried in the downlink control signaling sent to the terminal ;

The transceiver is further configured to send downlink control signaling to the terminal, where the downlink control signaling carries bandwidth resource instruction information; the bandwidth resource indicated by the bandwidth resource instruction information and downlink resources sent by other network devices to the terminal The bandwidth resources indicated by the bandwidth resource indication information carried in the control signaling are the same.
The method for transmitting a bandwidth resource according to claim 58 or the network device according to claim 59, wherein the plurality of downlink control signalings are transmitted using a same frequency domain resource.
The method for transmitting a bandwidth resource according to claim 58 or the network device according to claim 59, wherein the plurality of downlink control signalings are transmitted using different frequency domain resources.
The bandwidth resource sending method or network device according to claim 61, wherein the identifiers of the bandwidth resources indicated by the multiple bandwidth resource indication information are the same.
The method or network device for transmitting bandwidth resources according to claim 61, wherein the identifiers of the bandwidth resources indicated by the plurality of bandwidth resource indication information are different, and the bandwidth positions corresponding to the bandwidth resources are the same.
The method or network device for sending a bandwidth resource according to claim 63, wherein the bandwidth locations are the same, comprising: at least two of a start location, a bandwidth size, and an end location of the bandwidth resources are the same.
The method or network device for sending a bandwidth resource according to claim 64, wherein the starting positions of the bandwidth resources are the same, including the actual starting positions determined based on a frequency domain reference point and an offset.
The method or network device for sending a bandwidth resource according to claim 63 or 64, wherein the end positions of the bandwidth resources are the same, including the end positions determined based on the start position and the bandwidth size are the same.
The method for sending a bandwidth resource according to any one of claims 59 or 61 to 66 or the network device according to any one of claims 60 to 66, wherein the network device is further configured to receive a terminal from the network device. Send a positive or negative determination of the identified or switched bandwidth resource identifier.
A chip is characterized in that it includes at least one processor and a communication interface, where the processor is configured to perform the bandwidth resource switching method according to any one of claims 1 to 13 or to perform the methods described in claims 14 to 20 The method for instructing switching of bandwidth resources according to any one, or for performing the bandwidth resource receiving method according to any one of claims 39 or 41 to 47, or for performing any one of claims 48 or 50 to 57 The method for receiving a bandwidth resource according to the item, or the method for transmitting the bandwidth resource according to any one of claims 58 or 60 to 67.
A chip is characterized in that it includes at least one processor and a memory and a communication interface, the memory stores instructions, and the processor reads the instructions to execute the instructions according to any one of claims 1 to 13. Method for bandwidth resource switching or method for performing bandwidth resource switching according to any one of claims 14 to 20, or method for receiving bandwidth resource according to any one of claims 39 or 41 to 47 Or to perform the bandwidth resource receiving method according to any one of claims 48 or 50 to 57 or to perform the bandwidth resource sending method according to any one of claims 58 or 60 to 67.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are run on a processing component of a computer, the processing component is caused to execute any of claims 1 to 13. The method for bandwidth resource switching according to one item or the method for instructing bandwidth resource switching according to any one of claims 14 to 20, or the method for performing any one of claims 39 or 41 to 47 Method for receiving bandwidth resources, or for performing the method for receiving bandwidth resources according to any one of claims 48 or 50 to 57, or for performing bandwidth resource transmission according to any one of claims 58 or 60 to 67 method.
A computer product, wherein the computer stores instructions that, when the instructions are run on a processing component of a computer, cause the processing component to perform the bandwidth resource switching according to any one of claims 1 to 13. Method for performing a bandwidth resource switching method according to any one of claims 14 to 20, or for performing a bandwidth resource receiving method according to any one of claims 39 or 41 to 47, or The method for receiving a bandwidth resource according to any one of claims 48 or 50 to 57 or the method for sending a bandwidth resource according to any one of claims 58 or 60 to 67 is performed.