CN111865528B

CN111865528B - Method and equipment for triggering reporting of channel state information

Info

Publication number: CN111865528B
Application number: CN201910356786.3A
Authority: CN
Inventors: 杨拓; 胡丽洁; 王飞; 王启星
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2023-05-12
Anticipated expiration: 2039-04-29
Also published as: CN111865528A

Abstract

A method and device for triggering channel state information reporting are disclosed, wherein the method indicates a first uplink BWP and a first downlink BWP in one DCI at the same time, so that a terminal can be triggered to report CSI of a certain inactive downlink BWP only by signaling of one PDCCH, and network side signaling overhead, terminal signaling detection overhead and time delay of a CSI triggering reporting flow can be reduced.

Description

Method and equipment for triggering reporting of channel state information

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for triggering reporting of channel state information.

Background

Current new air interface (NR) systems support configuration of multiple bandwidth parts (BWP) for one User Equipment (UE), and higher layer signaling configures a set (e.g., up to 4) of downlink BWP and a set (e.g., up to 4) of uplink BWP for a terminal. For time division duplexing (TDD, time Division Duplex), one downlink BWP and one uplink BWP are associated, form one BWP pair, and the indexes are the same, and the center frequencies of the uplink and downlink BWP are the same. For frequency division duplex (FDD, frequency Division Duplex), there is no association between uplink and downlink BWP, and the center frequency points are different. The terminal can operate on only one active BWP at a time, and the base station can activate and deactivate the BWP through Radio Resource Control (RRC) signaling, or can indicate in downlink control information (DCI, downlink Control Information) which active BWP the terminal receives or transmits data in through a BWP indicator. In the switching of BWP by DCI, the BWP indicator may be located in DCI format 1_1 of the scheduling downlink data (PDSCH) or may be located in DCI format 0_1 of the scheduling uplink data (PUSCH). For FDD, DCI format for scheduling downlink data PDSCH can only switch downlink BWP, and DCI format 0_1 for scheduling uplink data PUSCH can only switch uplink BWP. Whereas for TDD, if a new downlink BWP indicated by the BWP indicator in DCI format 1_1 of the downlink data PDSCH is scheduled, then the uplink BWP also needs to be switched to the new uplink BWP indicated by the BWP indicator with the same index. Similarly, if uplink BWP is switched in DCI format 0_1 of the scheduled uplink data PUSCH, downlink BWP also needs to be switched to a new downlink BWP with the same index.

Disclosure of Invention

At least one embodiment of the invention provides a method and equipment for triggering channel state information reporting, which reduce time delay and control signaling overhead required by a flow of triggering a terminal to report CSI.

According to one aspect of the present invention, at least one embodiment provides a method of

The method for triggering the reporting of the channel state information is characterized by comprising the following steps:

transmitting downlink control information for scheduling a Physical Uplink Shared Channel (PUSCH) to a terminal, wherein the downlink control information comprises a first information domain and a second information domain;

the first information field is configured to indicate the first downlink BWP, where the first downlink BWP is a downlink BWP associated with activating a downlink BWP or performing CSI measurement by the terminal or performing CSI reporting by the terminal;

the second information field is configured to indicate a first uplink BWP, where the first uplink BWP is an uplink BWP for activating an uplink BWP or the terminal transmitting PUSCH for CSI reporting.

In addition, according to at least one embodiment of the present invention, the downlink control information further includes a third information field, where the third information field is used to indicate a trigger state of aperiodic CSI reporting or a CSI reporting request of the terminal.

Furthermore, in accordance with at least one embodiment of the present invention, when the first downlink BWP is different from the active second downlink BWP of the terminal, a time domain offset value of the associated channel state information-reference signal CSI-RS in the trigger state of the aperiodic CSI report is not smaller than a latency requirement of the terminal for performing an active BWP change.

Furthermore, according to at least one embodiment of the present invention, when the first uplink BWP is different from the activated second uplink BWP of the terminal, the time domain interval between the downlink control information and the scheduled PUSCH is not less than the time domain offset value of the associated CSI-RS in the trigger state of the aperiodic CSI report.

Furthermore, in accordance with at least one embodiment of the present invention, when the terminal employs unpaired spectrum, if the first downlink BWP is different from the activated second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the second downlink BWP.

Furthermore, in accordance with at least one embodiment of the present invention, the method further comprises:

and receiving the channel state information which is measured and reported by the terminal according to the downlink control information and is associated with the BWP of the first downlink bandwidth part.

Furthermore, according to at least one embodiment of the present invention, the step of receiving the channel state information associated with the first downlink bandwidth portion BWP measured and reported by the terminal according to the downlink control information includes:

and receiving a PUSCH on the first uplink BWP, wherein the PUSCH carries channel state information associated with the first downlink BWP.

According to another aspect of the present invention, at least one embodiment provides a method for triggering reporting of channel state information, which is characterized by comprising:

receiving downlink control information for scheduling a Physical Uplink Shared Channel (PUSCH), wherein the downlink control information comprises a first information domain and a second information domain;

In addition, according to at least one embodiment of the present invention, the downlink control information further includes a third information field, where the third information field is used to indicate a trigger state of aperiodic CSI reporting by the terminal.

measuring and reporting channel state information associated with the first downlink bandwidth part BWP according to the downlink control information;

furthermore, according to at least one embodiment of the present invention, the step of measuring and reporting channel state information associated with the first downlink bandwidth portion BWP according to the downlink control information includes:

and when the first downlink BWP is different from the activated second downlink BWP of the terminal, the terminal switches the currently activated downlink BWP from the second downlink BWP to the first downlink BWP, receives a measurement signal of CSI on the first downlink BWP, and obtains channel state information associated with the first downlink BWP.

Furthermore, in accordance with at least one embodiment of the present invention, when the terminal employs unpaired spectrum, if the first downlink BWP is different from the active second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the active second downlink BWP.

Furthermore, according to at least one embodiment of the present invention, the step of measuring and reporting channel state information associated with the first downlink bandwidth portion BWP according to the downlink control information further includes:

after the channel state information associated with the first downlink BWP is calculated or the CSI measurement signal is received on the first downlink BWP:

if the index of the first uplink BWP is the same as the index of the second downlink BWP, switching the currently activated downlink BWP from the first downlink BWP to the second downlink BWP, and transmitting PUSCH reporting channel state information in the first uplink BWP;

if the index of the first uplink BWP is the same as the index of the first downlink BWP, keeping the downlink BWP currently activated by the terminal unchanged, and transmitting PUSCH reporting channel state information in the first uplink BWP.

Furthermore, in accordance with at least one embodiment of the present invention, when the terminal adopts the paired spectrum, if the first downlink BWP is different from the active second downlink BWP of the terminal, the step of measuring and reporting channel state information associated with the first downlink bandwidth part BWP according to the downlink control information further includes:

After calculating channel state information associated with the first downlink BWP or after receiving CSI measurement signals on the first downlink BWP, switching the currently activated downlink BWP from the first downlink BWP to the second downlink BWP, and transmitting PUSCH reporting channel state information on the first uplink BWP.

According to another aspect of the present invention, at least one embodiment provides a base station comprising:

the system comprises a transceiver, a Physical Uplink Shared Channel (PUSCH) scheduling device and a wireless communication device, wherein the transceiver is used for sending downlink control information for scheduling the PUSCH to a terminal, and the downlink control information comprises a first information domain and a second information domain;

Furthermore, according to at least one embodiment of the present invention, the base station further includes:

and the processor is used for receiving the channel state information which is measured and reported by the terminal according to the downlink control information and is associated with the first downlink bandwidth part BWP through the transceiver.

Furthermore, in accordance with at least one embodiment of the present invention, the transceiver is further configured to receive a PUSCH on the first uplink BWP, where the PUSCH carries channel status information associated with the first downlink BWP.

According to one aspect of the present invention, at least one embodiment provides a terminal comprising:

a transceiver, configured to receive downlink control information for scheduling a physical uplink shared channel PUSCH, where the downlink control information includes a first information field and a second information field;

Furthermore, according to at least one embodiment of the present invention, the terminal further includes:

a processor, configured to measure and report channel state information associated with the first downlink bandwidth portion BWP according to the downlink control information;

furthermore, in accordance with at least one embodiment of the present invention, the processor is further configured to, when the first downlink BWP is different from an activated second downlink BWP of the terminal, switch the currently activated downlink BWP from the second downlink BWP to the first downlink BWP, and receive a measurement signal of CSI on the first downlink BWP to obtain channel state information associated with the first downlink BWP.

Furthermore, in accordance with at least one embodiment of the present invention, the processor is further configured to, after calculating channel state information associated with the first downlink BWP is completed or after receiving CSI measurement signals on the first downlink BWP:

Furthermore, in accordance with at least one embodiment of the present invention, the processor is further configured to, when the terminal adopts a paired spectrum, switch a currently active downlink BWP from the first downlink BWP to the second downlink BWP and transmit PUSCH reporting channel state information at a first uplink BWP after calculating channel state information associated with the first downlink BWP or after receiving CSI measurement signals at the first downlink BWP.

According to another aspect of the present invention, at least one embodiment provides a communication device comprising: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes the steps of the method for triggering the reporting of channel state information when being executed by the processor.

According to another aspect of the present invention, at least one embodiment provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of triggering reporting of channel state information as described above.

Compared with the prior art, the method and the device for triggering the reporting of the channel state information provided by the embodiment of the invention indicate the first uplink BWP and the first downlink BWP in one DCI at the same time, so that the terminal can be triggered to report the CSI of a certain inactive downlink BWP by only needing the signaling of one PDCCH, and the signaling overhead of a network side, the signaling detection overhead of the terminal and the time delay of the CSI triggering reporting flow can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exemplary diagram of a flow of CSI reporting by a trigger terminal in the prior art;

fig. 2 is a schematic diagram of an application scenario of a discontinuous reception method according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of CSI reporting by the trigger terminal according to the embodiment of the present invention;

fig. 4 is another flow chart of CSI reporting by the trigger terminal according to the embodiment of the present invention;

fig. 5 is an exemplary diagram of a trigger terminal for CSI reporting according to an embodiment of the present invention;

fig. 6 is another exemplary diagram of a trigger terminal for CSI reporting according to an embodiment of the present invention;

fig. 7 is a further exemplary diagram of CSI reporting performed by a trigger terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic diagram of another structure of a base station according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 11 is a schematic diagram of another structure of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. "and/or" in the specification and claims means at least one of the connected objects.

The techniques described herein are not limited to long term evolution (Long Time Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems and may also be used for various wireless communication systems such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, universal terrestrial radio access (Universal Terrestrial Radio Access, UTRA), and the like. UTRA includes wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as the global system for mobile communications (Global System for Mobile Communication, GSM). OFDMA systems may implement radio technologies such as ultra mobile broadband (UltraMobile Broadband, UMB), evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, flash-OFDM, and the like. UTRA and E-UTRA are parts of the universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS). LTE and higher LTE (e.g., LTE-a) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-a and GSM are described in the literature from an organization named "third generation partnership project" (3rd Generation Partnership Project,3GPP). CDMA2000 and UMB are described in the literature from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. However, the following description describes an NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration as set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Currently, measurement and reporting of channel state information (CSI, channel State Information) can only occur on active BWP and not on inactive BWP. The DCI format 0_1 of the scheduled uplink data (PUSCH) carries a "CSI request" information field, which can trigger the terminal to report aperiodic CSI on the uplink BWP through the PUSCH.

NR systems currently only support measurement reporting of CSI at an active BWP, and thus measurement reporting of CSI may be performed after switching to a new BWP. If periodic CSI reporting is performed, waiting for periodic measurement reporting time is needed; if the CSI is reported aperiodically, the terminal needs to receive a DCI carrying a "CSI request" first, so that measurement and reporting of CSI can be performed. Therefore, the terminal cannot perform fast CSI measurement and reporting during a period of time when switching to a new BWP. On the other hand, since the current NR only supports measurement reporting on the active BWP, if the base station only wants to obtain CSI information of a certain BWP, the terminal must be switched to the target BWP through DCI first, and after the CSI measurement reporting is completed, the terminal is switched back to the original BWP through DCI.

According to the current BWP switching procedure and the trigger aperiodic CSI reporting procedure, assuming that the terminal is currently operating in DL bwp#1, the base station wants to obtain channel state information of DL bwp#2, and switches back to DL bwp#1 after the channel state information is obtained, the current trigger CSI reporting procedure is as follows for TDD and FDD:

TDD：

1) The base station transmits DCI format 1_1 of the scheduled PDSCH on DL bwp#1, indicating that the terminal is switched from DL bwp#1 to DL bwp#2, and the terminal switches DL BWP to UL bwp#2 while switching DL BWP due to a binding relationship between DL BWP and UL BWP in the TDD case.

2) The base station transmits DCI format 0_1 of scheduling PUSCH on DL bwp#2, triggers CSI request of the terminal, and the terminal performs CSI measurement on DL bwp#2 and reports on UL bwp#2.

3) The base station transmits DCI format 0_1 of scheduling PUSCH or DCI format 1_1 of scheduling PDSCH on DL bwp#2, instructs the terminal to switch back from UL bwp#2 and DL bwp#2 to UL bwp#1 and DL bwp#1.

FDD：

1) The base station transmits DCI format 1_1 of the scheduled PDSCH on DL bwp#1, instructing the terminal DL bwp#1 to switch to DL bwp#2.

2) The base station transmits DCI format 0_1 of scheduling PUSCH on DL bwp#2, triggers CSI request of the terminal, and the terminal performs CSI measurement on DL bwp#2 and reports on a certain UL BWP.

3) The base station transmits DCI format 1_1 of the scheduled PDSCH on DL bwp#2, instructing the terminal to switch from DL bwp#2 back to DL bwp#1.

Referring to fig. 1, it can be seen that if a base station wants to acquire channel state information of a certain BWP while it is required to switch back to the current BWP after acquiring the channel state information, 3 PDCCHs are required to complete. The terminal needs to receive 3 PDCCHs to finish measurement reporting work of CSI of other inactive BWP, resulting in a larger delay, and meanwhile, the terminal cannot transmit and receive data in the BWP switching process, so that the spectrum utilization efficiency is reduced. If the base station needs to frequently acquire the channel state information of other inactive BWP, the PDCCH signaling overhead of the network side is also larger.

In order to solve at least one of the above problems, at least one embodiment of the present invention provides a method for triggering reporting of channel state information, where a PDCCH triggers a terminal to report channel state measurement in other BWP, so as to reduce delay caused by an interaction process requiring 3 PDCCHs in the above process, and reduce delay and control signaling overhead of the overall process.

Referring to fig. 2, fig. 2 is a block diagram of a wireless communication system to which embodiments of the present invention are applicable. The wireless communication system includes a terminal 21 and a base station 22. The terminal 21 may also be referred to as a User terminal or a User Equipment (UE), and the terminal 21 may be a terminal-side Device such as a mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, which is not limited to a specific type of the terminal 21 in the embodiment of the present invention. The base station 22 may be various base stations and/or core network elements, where the base stations may be 5G or later versions of base stations (e.g., a gNB, a 5G NR NB, etc.), or base stations in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), where the base station 22 may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, a BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary, and in the embodiment of the present invention, the base station in the NR system is merely taken as an example, but not limited to a specific type of the base station.

The base station 22 may communicate with the terminal 21 under control of a base station controller, which in various examples may be part of a core network or some base stations. Some base stations may communicate control information or user data with the core network over a backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly over a backhaul link, which may be a wired or wireless communication link. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multicarrier transmitter may transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multicarrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

Base station 22 may communicate wirelessly with terminal 21 via one or more access point antennas. Each base station may provide communication coverage for a respective corresponding coverage area. The coverage area of an access point may be partitioned into sectors that form only a portion of that coverage area. A wireless communication system may include different types of base stations (e.g., macro base stations, micro base stations, or pico base stations). The base station may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations, including coverage areas of the same or different types of base stations, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks, may overlap.

The communication link in the wireless communication system may include an Uplink for carrying Uplink (UL) transmissions (e.g., from the terminal 21 to the base station 22) or a Downlink for carrying Downlink (DL) transmissions (e.g., from the base station 22 to the terminal 21). UL transmissions may also be referred to as reverse link transmissions, while DL transmissions may also be referred to as forward link transmissions. Downlink transmissions may be made using licensed bands, unlicensed bands, or both. Similarly, uplink transmissions may be made using licensed bands, unlicensed bands, or both.

It should be noted that, the network device in the embodiment of the present invention may be implemented by a base station (access network node) in fig. 2, or by a core network node, or by both the access network node and the core network node.

Referring to fig. 3, a method for triggering reporting of channel state information provided by an embodiment of the present invention is applied to a base station side, and includes:

step 31, downlink control information for scheduling a Physical Uplink Shared Channel (PUSCH) is sent to the terminal, where the downlink control information includes a first information field and a second information field.

The first information field is configured to indicate the first downlink BWP, where the first downlink BWP is a downlink BWP that activates downlink BWP or performs Channel State Information (CSI) measurement by the terminal or is associated with CSI reporting by the terminal; the second information field is configured to indicate a first uplink BWP, where the first uplink BWP is an uplink BWP for activating an uplink BWP or the terminal transmitting PUSCH for CSI reporting.

Here, the Downlink Control Information (DCI) may be carried in one PDCCH, and as can be seen from the above steps, in the embodiment of the present invention, the first and second information fields are added to the DCI, so that the first downlink BWP and the first uplink BWP are indicated by one PDCCH (one DCI) respectively.

The first downlink BWP may be an active downlink BWP, so after the terminal receives the DCI, the terminal needs to switch the current active second downlink BWP of the terminal to the first downlink BWP, and then perform CSI measurement on the first downlink BWP. Of course, if the active second downlink BWP is the same BWP as the first downlink BWP, the above-mentioned BWP does not need to be switched.

The first downlink BWP may also be a downlink BWP on which the terminal performs Channel State Information (CSI) measurement, so that the terminal may perform CSI measurement on the first downlink BWP after receiving the DCI. Of course, if the terminal active downlink BWP and the first downlink BWP are not the same BWP, the terminal current active downlink BWP needs to be switched to the first downlink BWP before CSI measurement.

Similarly, the first downlink BWP may also be a downlink BWP associated with CSI reporting by the terminal, where the downlink BWP associated with CSI reporting refers to information reported by CSI and measured on the downlink BWP.

The first uplink BWP may be an active uplink BWP, so that after the terminal receives the DCI, the terminal needs to switch the currently active second uplink BWP of the terminal to the first uplink BWP and then report CSI on the first uplink BWP. Of course, if the active second upstream BWP is the same BWP as the first upstream BWP, the above BWP does not need to be switched. Similarly, the first uplink BWP may also transmit uplink BWP of PUSCH reporting CSI by the terminal.

Through the steps, the embodiment of the invention indicates the first uplink BWP and the first downlink BWP in one DCI at the same time, so that the terminal can be triggered to report the CSI of a certain inactive downlink BWP by only needing the signaling of one PDCCH, thereby reducing the signaling overhead of a network side, the signaling detection overhead of the terminal and the time delay of a CSI triggering reporting flow.

In addition, according to at least one embodiment of the present invention, the downlink control information in the step 31 may further include a third information field, where the third information field is used to indicate a trigger state of aperiodic CSI reporting or a CSI reporting request of the terminal. The trigger status or CSI reporting request is for indicating configuration parameters of aperiodic CSI reporting associated with the first downlink BWP. For example, the manner of indicating the trigger state may specifically be by carrying an index number of the trigger state in the third information field.

Considering the time delay required by the terminal to perform downlink BWP handover, when the first downlink BWP is different from the active second downlink BWP of the terminal, the time domain offset value of the associated channel state information-reference signal CSI-RS in the trigger state of the aperiodic CSI report is not smaller than the time delay requirement of the terminal to perform active BWP change.

Considering the time delay required by the terminal to perform uplink BWP switching, when the first uplink BWP is different from the active second uplink BWP of the terminal, the time domain interval between the downlink control information and the PUSCH scheduled by the downlink control information is not less than the time domain offset value of the associated channel state information-Reference Signal (CSI-RS, channel State Information-Reference Signal) in the trigger state of the aperiodic CSI reporting.

In addition, when the terminal adopts unpaired (unpaired) spectrum, if the first downlink BWP is different from the activated second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the second downlink BWP.

After the step 31, the method may further include:

in step 32, the base station may further receive channel state information associated with the first downlink BWP measured and reported by the terminal according to the downlink control information.

Specifically, the base station may receive a PUSCH on the first uplink BWP, where the PUSCH carries channel state information of the first downlink BWP, so as to obtain a measurement result of the channel state information associated with the first downlink BWP.

Correspondingly, the embodiment of the invention also provides a method flow of the terminal side, which corresponds to the method shown in fig. 3. Referring to fig. 4, in accordance with at least one embodiment of the present invention, a method for triggering reporting of channel state information may include, when applied to a terminal side:

step 41, receiving downlink control information for scheduling PUSCH, where the downlink control information includes a first information field and a second information field.

Here, the Downlink Control Information (DCI) may be carried in one PDCCH, and as can be seen from the above steps, in the embodiment of the present invention, the first and second information fields are added in the DCI, so that the first downlink BWP and the first uplink BWP are indicated to the terminal through one PDCCH (one DCI) respectively, so that the terminal can be triggered to perform CSI reporting of a certain inactive downlink BWP only by signaling of one PDCCH, thereby reducing signaling overhead on the network side, signaling detection overhead of the terminal, and time delay of a CSI triggering reporting procedure.

In addition, according to at least one embodiment of the present invention, the downlink control information in the step 41 may further include a third information field, where the third information field is used to indicate a trigger state of aperiodic CSI reporting or a CSI reporting request of the terminal.

According to at least one embodiment of the present invention, when the first downlink BWP is different from the active second downlink BWP of the terminal, the time domain offset value of the associated channel state information-reference signal CSI-RS in the trigger state of the aperiodic CSI report is not smaller than the delay requirement of the terminal for performing the active BWP change.

According to at least one embodiment of the present invention, when the first uplink BWP is different from the active second uplink BWP of the terminal, a time domain interval between the downlink control information and the PUSCH scheduled by the downlink control information is not less than a time domain offset value of a channel state information-Reference Signal (CSI-RS, channel State Information-Reference Signal) associated in a trigger state of the aperiodic CSI report.

After the step 41, the method may further include the steps of:

and step 42, the terminal measures and reports the channel state information associated with the first downlink BWP according to the downlink control information.

Specifically, when the first downlink BWP is different from the activated second downlink BWP of the terminal, the terminal switches the currently activated downlink BWP from the second downlink BWP to the first downlink BWP, and receives the CSI measurement signal on the first downlink BWP to obtain the channel state information associated with the first downlink BWP.

Furthermore, in accordance with at least one embodiment of the present invention, when the terminal employs unpaired (unpaired) spectrum, if the first downlink BWP is different from the active second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the second downlink BWP. At this time, in the above step 42, the terminal calculates channel state information associated with the first downlink BWP or receives the CSI measurement signal on the first downlink BWP after the completion of the calculation:

if the index of the first uplink BWP is the same as the index of the second downlink BWP, switching the currently activated downlink BWP from the first downlink BWP to the second downlink BWP, and transmitting PUSCH report channel status information at the first uplink BWP, so that the activated downlink BWP can be activated before automatically resetting the activated BWP to receive the downlink control information;

Further, according to at least one embodiment of the present invention, in the above-mentioned step 42, when the terminal adopts a paired (paired) spectrum, if the first downlink BWP is different from the active second downlink BWP of the terminal, the terminal switches the currently active downlink BWP from the first downlink BWP to the second downlink BWP after calculating the channel state information associated with the first downlink BWP or after receiving the CSI measurement signal on the first downlink BWP, and transmits PUSCH report channel state information at the first uplink BWP, so that the active downlink BWP may be activated before automatically resetting the active BWP to the active downlink BWP before receiving the downlink control information.

In order to better understand the above methods of embodiments of the present invention, the present invention is further described below by way of several examples.

Example 1:

taking TDD as an example, the current active BWP of the terminal is downlink bwp#1 and uplink bwp#1, respectively. The base station transmits a PDCCH for scheduling PUSCH, wherein a first information field in the DCI format indicates that downlink BWP of the terminal that needs CSI measurement is downlink bwp#2, an uplink BWP of the terminal where CSI reporting indicated by the second information field is uplink bwp#1, and a third information field indicates a certain CSI triggering state.

As shown in fig. 5, after receiving the PDCCH, the terminal first switches downlink BWP to downlink bwp#2, switches uplink BWP to uplink bwp#2, then receives measurement signals of CSI on downlink bwp#2, and then switches back to downlink bwp#1 and uplink bwp#1, respectively, and reports CSI on PUSCH of uplink bwp#1.

Compared with the traditional flow, only one PDCCH signaling trigger is needed, and network side overhead, terminal detection overhead and time delay of the whole flow are reduced.

Example 2:

taking TDD as an example, the current active BWP of the terminal is downlink bwp#1 and uplink bwp#1, respectively. The base station transmits a PDCCH for scheduling PUSCH, wherein a first information field in the DCI format indicates that downlink BWP of the terminal that needs CSI measurement is downlink bwp#2, an uplink BWP of the terminal where CSI reporting indicated by the second information field is uplink bwp#2, and a third information field indicates a certain CSI triggering state.

As shown in fig. 6, after receiving the PDCCH, the terminal first switches downlink BWP to downlink bwp#2, switches uplink BWP to uplink bwp#2, then receives measurement signals of CSI on downlink bwp#2, reports CSI on PUSCH on uplink bwp#2, and then activates BWP of the terminal to downlink bwp#2 and uplink bwp#2 all the time.

Example 3:

taking FDD as an example, the current active BWP of the terminal is downlink bwp#1 and uplink bwp#1, respectively. The base station transmits a PDCCH for scheduling PUSCH, wherein a first information field in the DCI format indicates that downlink BWP of the terminal that needs CSI measurement is downlink bwp#2, an uplink BWP of the terminal where CSI reporting indicated by the second information field is uplink bwp#2, and a third information field indicates a certain CSI triggering state.

As shown in fig. 7, after receiving the PDCCH, the terminal first switches downlink BWP to downlink bwp#2, uplink BWP to uplink bwp#2, and then receives a measurement signal of CSI on downlink bwp#2, after which downlink active BWP of the terminal switches back to downlink bwp#1, uplink active BWP is always uplink bwp#2, and CSI is reported on PUSCH of uplink bwp#2.

From the above examples, it can be seen that, by using the method for triggering reporting of channel state information provided by the embodiment of the present invention, signaling overhead of PDCCH in CSI triggering reporting procedure can be saved, and delay of switching to other BWP by the terminal for reporting CSI measurement can be reduced.

Based on the method, the embodiment of the invention also provides equipment for implementing the method.

Referring to fig. 8, a schematic structural diagram of a base station according to an embodiment of the present invention is shown in fig. 8, and the base station 80 includes a processor 81 and a transceiver 82, wherein:

a transceiver 82, configured to send downlink control information for scheduling a physical uplink shared channel PUSCH to a terminal, where the downlink control information includes a first information field and a second information field;

Further, according to at least one embodiment of the present invention, the processor 81 is configured to receive, through the transceiver, channel state information associated with the first downlink bandwidth portion BWP measured and reported by the terminal according to the downlink control information.

Furthermore, in accordance with at least one embodiment of the present invention, the transceiver 82 is further configured to receive a PUSCH on the first uplink BWP, where the PUSCH carries channel status information associated with the first downlink BWP.

Referring to fig. 9, another schematic structure of a base station is provided in an embodiment of the present invention, including: processor 901, transceiver 902, memory 903, and bus interface, wherein:

In an embodiment of the present invention, the network device 900 further includes: a computer program stored on the memory 903 and executable on the processor 901, which when executed by the processor 901 performs the steps of: transmitting downlink control information for scheduling a Physical Uplink Shared Channel (PUSCH) to a terminal, wherein the downlink control information comprises a first information domain and a second information domain;

In fig. 9, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, represented in particular by processor 901, and the memory, represented by memory 903, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 902 may be a number of elements, i.e., include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.

The processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.

Furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 901: and receiving the channel state information which is measured and reported by the terminal according to the downlink control information and is associated with the BWP of the first downlink bandwidth part.

Furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 901: and receiving a PUSCH on the first uplink BWP, wherein the PUSCH carries channel state information associated with the first downlink BWP.

Referring to fig. 10, an embodiment of the present invention provides a terminal 100, including a transceiver 102 and a processor 101, wherein,

the transceiver 102 is configured to send downlink control information for scheduling a physical uplink shared channel PUSCH to a terminal, where the downlink control information includes a first information field and a second information field;

Further, according to at least one embodiment of the present invention, the processor 101 is configured to receive, through the transceiver, channel state information associated with the first downlink bandwidth portion BWP measured and reported by the terminal according to the downlink control information.

Furthermore, in accordance with at least one embodiment of the present invention, the transceiver 102 is further configured to receive a PUSCH on the first uplink BWP, where the PUSCH carries channel status information associated with the first downlink BWP.

Referring to fig. 11, in another structure of a terminal provided in an embodiment of the present invention, a terminal 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, a user interface 1104 and a bus interface, wherein:

in an embodiment of the present invention, the terminal 1100 further includes: a computer program stored on the memory 1103 and executable on the processor 1101, which when executed by the processor 1101 performs the steps of: receiving downlink control information for scheduling a Physical Uplink Shared Channel (PUSCH), wherein the downlink control information comprises a first information domain and a second information domain;

In fig. 11, a bus architecture may comprise any number of interconnecting buses and bridges, with various circuits of the one or more processors, as represented by the processor 1101, and the memory, as represented by the memory 1103, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1102 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1104 may also be an interface capable of interfacing with an inscribed desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing the operations.

Furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 1101: measuring and reporting channel state information associated with the first downlink bandwidth part BWP according to the downlink control information;

furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 1101: and when the first downlink BWP is different from the activated second downlink BWP of the terminal, the terminal switches the currently activated downlink BWP from the second downlink BWP to the first downlink BWP, receives a measurement signal of CSI on the first downlink BWP, and obtains channel state information associated with the first downlink BWP.

Furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 1101: after the channel state information associated with the first downlink BWP is calculated or the CSI measurement signal is received on the first downlink BWP:

Furthermore, according to at least one embodiment of the present invention, the computer program may further implement the following steps when executed by the processor 1101: when the terminal adopts the paired spectrum, if the first downlink BWP is different from the activated second downlink BWP of the terminal, after calculating the channel state information associated with the first downlink BWP or receiving the CSI measurement signal on the first downlink BWP, switching the currently activated downlink BWP from the first downlink BWP to the second downlink BWP, and transmitting the PUSCH reporting channel state information on the first uplink BWP.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A method for triggering reporting of channel state information, comprising:

the first information field is configured to indicate a first downlink BWP, where the first downlink BWP is a downlink BWP for activating downlink BWP or performing CSI measurement by the terminal or a downlink BWP associated with CSI reporting by the terminal;

2. The method of claim 1, wherein the downlink control information further includes a third information field, the third information field being used to indicate a trigger state of aperiodic CSI reporting or a CSI reporting request of the terminal.

3. The method of claim 2, wherein,

and when the first downlink BWP is different from the activated second downlink BWP of the terminal, the time domain offset value of the associated channel state information-reference signal (CSI-RS) in the trigger state of the aperiodic CSI report is not smaller than the time delay requirement of the terminal for activating BWP change.

4. The method of claim 2, wherein,

and when the first uplink BWP is different from the activated second uplink BWP of the terminal, the time domain interval between the downlink control information and the scheduled PUSCH is not smaller than the time domain offset value of the associated CSI-RS in the trigger state of the aperiodic CSI report.

5. The method of claim 1, wherein,

when the terminal adopts unpaired spectrum, if the first downlink BWP is different from the activated second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the second downlink BWP.

6. The method as recited in claim 1, further comprising:

7. The method of claim 6, wherein,

the step of receiving the channel state information associated with the first downlink bandwidth part BWP, which is measured and reported by the terminal according to the downlink control information, includes:

8. A method for triggering reporting of channel state information, comprising:

the first information field is configured to indicate a first downlink BWP, where the first downlink BWP is a downlink BWP for activating downlink BWP or performing CSI measurement by a terminal or a downlink BWP associated with CSI reporting by the terminal;

9. The method of claim 8, wherein the downlink control information further includes a third information field, and the third information field is used to indicate a trigger state of aperiodic CSI reporting by the terminal.

10. The method of claim 9, wherein,

11. The method of claim 9, wherein,

12. The method as recited in claim 8, further comprising:

and measuring and reporting channel state information associated with the first downlink bandwidth part BWP according to the downlink control information.

13. The method of claim 12, wherein the step of measuring and reporting channel state information associated with the first downlink bandwidth portion BWP based on the downlink control information comprises:

14. The method of claim 13, wherein,

when the terminal adopts unpaired spectrum, if the first downlink BWP is different from the active second downlink BWP of the terminal, the index of the first uplink BWP is the same as the index of the first downlink BWP or the active second downlink BWP.

15. The method of claim 14, wherein the step of measuring and reporting channel state information associated with the first downlink bandwidth portion BWP based on the downlink control information, further comprises:

16. The method of claim 13, wherein,

When the terminal adopts the paired spectrum, if the first downlink BWP is different from the activated second downlink BWP of the terminal, the step of measuring and reporting the channel state information associated with the first downlink bandwidth part BWP according to the downlink control information further includes:

17. A base station, comprising:

18. The base station of claim 17, wherein the downlink control information further comprises a third information field, the third information field being used to indicate a trigger state of aperiodic CSI reporting or a CSI reporting request of the terminal.

19. The base station of claim 17, further comprising:

20. The base station of claim 17, wherein,

the transceiver is further configured to receive a PUSCH on the first uplink BWP, where the PUSCH carries channel status information associated with the first downlink BWP.

21. A terminal, comprising:

22. The terminal of claim 21, wherein the downlink control information further includes a third information field, and the third information field is used to indicate a trigger state of aperiodic CSI reporting by the terminal.

23. The terminal of claim 21, further comprising:

and the processor is used for measuring and reporting the channel state information associated with the first downlink bandwidth part BWP according to the downlink control information.

24. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method of triggering channel state information reporting as claimed in any one of claims 1 to 16.

25. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, which computer program, when executed by a processor, implements the steps of the method of triggering channel state information reporting according to any one of claims 1 to 16.