CN114727395A

CN114727395A - Method, device and communication equipment for determining downlink control information bit

Info

Publication number: CN114727395A
Application number: CN202110015223.5A
Authority: CN
Inventors: 李娜; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2022-07-08

Abstract

The application discloses a method, a device and communication equipment for determining downlink control information bits, and belongs to the field of communication. The method comprises the following steps: under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through terminal UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by the PDSCH scrambling, and the number of bits of the first bit is determined by the number of the group common RNTIs configured to user equipment.

Description

Method, device and communication equipment for determining downlink control information bit

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a method and communication equipment for determining downlink control information bits.

Background

In a New Radio (NR), a unicast (unicast) Physical Downlink Shared Channel (PDSCH) uses terminal-specific (specific) Downlink Control Information (DCI), which may also be called terminal-specific (dedicated) DCI or dedicated DCI scheduling, and a terminal may also be called a terminal device or a User Equipment (UE) performs feedback according to indication Information in the DCI, for example, determines Physical Uplink Control Channel (PUCCH) transmission resources and transmission power according to DCI indication, so that different UEs may allocate different PUCCH resources, avoid resource collision, and enable the reception powers of different UEs to be the same as possible.

However, in broadcast or multicast transmission, the group common DCI may be used to schedule the group common PDSCH, but the use of the group common DCI to schedule the group common PDSCH may cause certain problems for HARQ-ACK feedback, for example, different UEs cannot be allocated to different PUCCH resources. In addition, the problem of HARQ-ACK feedback caused by the group common DCI scheduling group common PDSCH can be solved by using the terminal specific DCI scheduling group common PDSCH. But when the group common PDSCH is scheduled using the terminal-specific DCI, a different PDSCH cannot be indicated.

Disclosure of Invention

The embodiment of the application provides a method and communication equipment for determining downlink control information bits, which can be used for indicating different PDSCHs.

In a first aspect, a method for determining downlink control information bits is provided, where the method is performed by a communication device and includes: under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by scrambling of the PDSCH, and the number of bits of the first bit is determined by the number of the group common RNTIs configured to user equipment.

In a second aspect, an apparatus for determining downlink control information bits is provided, including: a determining module, configured to, when a group common physical downlink shared channel PDSCH is scheduled through UE-specific downlink control information DCI, use a first bit in the UE-specific DCI to indicate a radio network temporary identifier RNTI used for scrambling the PDSCH, where a bit number of the first bit is determined by a number of group common RNTIs configured to user equipment.

In a third aspect, a terminal device is provided, which comprises a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to the first aspect.

In a fourth aspect, a network device is provided, which comprises a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the method according to the first aspect.

In a fifth aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, implement the steps of the method according to the first aspect.

In a sixth aspect, a computer program product is provided, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method according to the first aspect.

In a seventh aspect, a chip is provided, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.

According to the method, the device and the communication equipment for determining the downlink control information bits provided by the embodiment of the invention, under the condition that the group common Physical Downlink Shared Channel (PDSCH) is scheduled through the UE specific Downlink Control Information (DCI), the Radio Network Temporary Identifier (RNTI) used by scrambling the PDSCH is indicated through the first bit in the UE specific DCI, the number of the first bit is determined by the number of the group common RNTIs configured to the user equipment, and the PDSCH scrambled by different RNTIs can be scheduled by using the DCI with a uniform format.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable.

FIG. 2 is a schematic flow chart diagram of a method of determining downlink control information bits in accordance with one embodiment of the present invention;

fig. 3 is a schematic structural diagram of an apparatus for determining downlink control information bits according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a communication device according to another embodiment of the present invention;

FIG. 5 is a schematic block diagram of a network device according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that the terms so used are interchangeable under appropriate circumstances such that embodiments of the present application may be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in embodiments of the application, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systemsAnd radio technology. The following description describes a New Radio (NR) system for purposes of example, and using NR terminology in much of the description below, the techniques may also be applied to applications other than NR system applications, such as generation 6 (6) systems^thGeneration, 6G) communication system.

Fig. 1 shows a schematic diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an 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, a Transmit Receive Point (TRP), or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The method for determining downlink control information bits provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings by using some embodiments and application scenarios thereof.

As shown in fig. 2, an embodiment of the present invention provides a method 200 for determining downlink control information bits, which may be performed by a communication device including a terminal device and/or a network device, that is, the method may be performed by the terminal device and/or the network device, in other words, the method may be performed by software or hardware installed in the terminal device and/or the network device, and the method includes the following steps:

s202: under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by scrambling of the PDSCH, and the number of bits of the first bit is determined by the number of the group common RNTIs configured to user equipment.

The UE-specific DCI in this step may also be called terminal-specific DCI or dedicated DCI. The group common PDSCH in this step may also be called a multicast PDSCH or a multicast PDSCH, and mainly refers to a PDSCH transmitted to one or more terminals through the same physical resource.

Each piece of DCI has a Radio Network Temporary Identifier (RNTI), and after Cyclic Redundancy Check (CRC) of the DCI, the CRC is scrambled using the corresponding RNTI. The RNTI that scrambles the DCI CRC includes various kinds. Wherein different RNTIs have different purposes, such as C-RNTI for Scheduling a uni-est PDSCH transmission or PUSCH resource allocation, Configured Scheduling RNTI (CS-RNTI) for activating or deactivating Semi-Persistent Scheduling (SPS) PDSCH or Cell Group (CG) PUSCH transmission, and the like.

For PDSCH transmission, in the scrambling process, the scrambling sequence is initialized according to the RNTI associated with the PDSCH, and in the related art, the RNTI associated with the PDSCH is the same as the CRC scrambling RNTI of the scheduling or activating DCI corresponding to the RNTI. Therefore, in this step, the first bit indicates the RNTI used by the PDSCH scrambling, and DCI with a uniform format can be used to schedule PDSCH scrambled by different types, i.e. different RNTIs.

According to the method for determining downlink control information bits provided by the embodiment of the invention, under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by the PDSCH scrambling, and the number of bits of the first bit is determined by the number of the group common RNTIs configured to user equipment, so that different PDSCHs can be indicated, the UE can descramble and receive the PDSCH according to the indication, and the effectiveness of a communication system is improved. .

In one implementation, the number X of the first bits is determined by a logarithm of the number N of group common RNTIs configured by the user equipment.

In one implementation, the number of bits of the first bit is determined by a base 2 logarithm of the number N of group common RNTIs configured to the user equipment, for example:

X＝cell(log₂(N)) (1)

in one implementation, in the first case, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, for example, where N represents the number of g-RNTIs configured by the UE, or represents the number of RNTIs for scrambling a PDSCH of multicast/group common/multicast, or represents the number of RNTIs for scrambling a PDSCH for transmitting MBS service data, or represents the number of MBS services, and the above formula (1) holds. Wherein the first condition comprises at least one of: the user equipment only supports the condition of Broadcast Multicast Service (MBS);

the user equipment only configures the MBS service receiving condition;

the user equipment is not configured with a Cell radio network temporary identifier (Cell RNTI, C-RNTI);

the situation that the user equipment does not configure the RNTI of the scrambled unicast PDSCH;

the UE-specific DCI only has the capability to schedule the group common PDSCH. The UE-specific DCI herein may refer to a generic DCI such as DCI format 1-1, or a DCI format scrambled by a certain RNTI, for example, C-RNTI scrambled DCI 1_1, rather than a UE-specific DCI transmitted through a certain PDCCH.

In one implementation, the first parameter of the UE-specific DCI has only the capability to schedule a group common PDSCH, wherein the first parameter may include at least one of: a DCI format corresponding to the UE-specific DCI; an RNTI corresponding to the UE-specific DCI; a control resource set corresponding to the UE-specific DCI; a search space corresponding to the UE-specific DCI; a Transmission Configuration Indicator (TCI) corresponding to the UE-specific DCI. For example, a certain DCI format can only schedule group common PDSCH; DCI scrambled by a certain RNTI can only schedule a group common PDSCH; DCI transmitted in a certain/certain type of control resource set can only schedule a group common PDSCH; DCI transmitted in a certain/certain type of search space set can only schedule a group common PDSCH; DCI with certain TCI can only schedule group common PDSCH

For example, when the UE is configured with only MBS service reception and does not need to receive unicast PDSCH, or a certain DCI format is only used for scheduling group common PDSCH (g-RNTI), and the UE is configured with a plurality of g-RNTIs for scrambling group common PDSCH, wherein different g-RNTIs correspond to different MBS services. At this time, a certain bit is included in the DCI to indicate the RNTI used by the PDSCH scheduled by the DCI, where X is log₂(N), wherein N represents the number of g-RNTIs configured by the UE. For example, if N is 1, that is, if the UE has only one g-RNTI, and X is 0, it indicates that the RNTI corresponding to the PDSCH to which the DCI is scheduled is not required in the DCI, and the UE directly determines the RNTI corresponding to the PDSCH as the g-RNTI in the higher layer configuration based on the higher layer configuration information.

When N is 2, that is, the UE configures 2 g-RNTIs, such as g-RNTI1 and g-RNTI2, and X is 1, it indicates that the RNTI corresponding to the PDSCH including 1 bit for indicating DCI scheduling is g-RNTI1 or g-RNTI 2. For example, when the 1 bit is 0, the RNTI corresponding to the PDSCH for instructing DCI scheduling is g-RNTI1, and when the 1 bit is 1, the RNTI corresponding to the PDSCH for instructing DCI scheduling is g-RNTI 2.

In another implementation, the number of bits X of the first bit is determined by a first number M and a number N of group common RNTIs configured by a user equipment, where the first number M is one of: the number of RNTIs scrambling the unicast PDSCH; the number of RNTIs of the partially scrambled unicast PDSCH can be determined by a protocol or configured by a base station, particularly the number of RNTIs of which partially scrambled unicast PDSCH is determined; the number determined by the high layer configuration.

In one implementation, the number of bits of the first bit is determined by a logarithm of a sum of the first number and a number of group common RNTIs configured by the user equipment. In one implementation, the logarithm is a base-2 logarithm. For example:

X＝cell(log₂(N+M)) (2)

in one implementation, in a second case, the number of bits of the first bit is determined by the first number M and the number N of group common RNTIs configured by the user equipment, that is, in a case where a second condition is satisfied, the above equation (2) holds. Wherein the second condition comprises one of: the user equipment supports the receiving of MBS service and unicast service, or the user equipment configures the receiving of MBS service and unicast service; user equipment configures MBS service receiving and unicast service receiving conditions; the user equipment is configured with the C-RNTI; the situation that the user equipment configures RNTI of the scrambled unicast PDSCH; the UE-specific DCI has a capability to schedule a group common PDSCH and to schedule a unicast PDSCH.

In one implementation, the case that the UE-specific DCI has the capability of scheduling a group common PDSCH and scheduling a unicast PDSCH includes: a second parameter of the UE-specific DCI having a capability of scheduling a group common PDSCH and scheduling a unicast PDSCH, wherein the second parameter may include: a format of the UE-specific DCI; an RNTI corresponding to the UE-specific DCI; a control resource set corresponding to the UE-specific DCI; at least one of search spaces corresponding to the UE-specific DCI.

For example, when the UE configures unicast service reception and MBS service reception, or a certain DCI format may be used for scheduling both the group common PDSCH and the unicast PDSCH, and the UE configures one or more g-RNTIs for scrambling the group common PDSCH, where different g-RNTIs correspond to different MBS services. In this case, a certain bit is included in the DCI to indicate an RNTI used by the PDSCH scheduled by the DCI, where X is cell (log2(1+ N)), where N represents the number of g-RNTIs configured by the UE.

For example, if N is 1, that is, if the UE has only one g-RNTI allocated, and X is 1, then the UE indicates that 1-bit information is required in the DCI to indicate the RNTI corresponding to the PDSCH scheduled by the DCI, for example, if the bit is 0, the RNTI corresponding to the PDSCH is C-RNTI or the same RNTI (e.g., MCS-C-RNTI or CS-RNTI) as the CRC scrambling of the DCI, and if the bit is 1, the RNTI corresponding to the PDSCH is g-RNTI.

When N is 2, that is, the UE configures 2 g-RNTIs, such as g-RNTI1 and g-RNTI2, and X is 2, it indicates that 2 bits of RNTI corresponding to the PDSCH for indicating DCI scheduling is g-RNTI1 or g-RNTI2 or RNTI for scrambling unicast PDSCH included in the DCI, for example, when the 2 bits are 00, the RNTI corresponding to the PDSCH for indicating DCI scheduling is C-RNTI or RNTI (such as MCS-C-RNTI or CS-RNTI) identical to CRC scrambling of DCI, when the 2 bits are 01, the RNTI corresponding to the PDSCH for indicating DCI scheduling is g-RNTI1, and when the 2 bits are 10, the RNTI corresponding to the PDSCH for indicating DCI scheduling is g-RNTI 2.

According to the method for determining downlink control information bits provided by the embodiment of the invention, under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by scrambling of the PDSCH, and the number of bits of the first bit is determined by the first number and the number of group common RNTIs configured by user equipment, so that PDSCHs scrambled by different RNTIs, namely PDSCHs of different types can be indicated, the UE can descramble and receive the PDSCH according to the indication, and the effectiveness of a communication system is improved.

Under the condition that the method is executed by the terminal equipment and the network equipment, the terminal equipment and the network equipment can ensure the cognition of the PDSCH to be consistent, and the effectiveness of a communication system is ensured.

Fig. 3 is a schematic structural diagram of an apparatus for determining downlink control information bits according to an embodiment of the present invention. As shown in fig. 3, the apparatus 300 for determining downlink control information bits includes:

a determining module 301, configured to, when a group common physical downlink shared channel PDSCH is scheduled through UE-specific downlink control information DCI, use a first bit in the UE-specific DCI to indicate a radio network temporary identifier RNTI used for scrambling the PDSCH, where a bit number of the first bit is determined by a number of group common RNTIs configured to user equipment.

In one implementation, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, and includes: the number of bits of the first bit is determined by a logarithm of the number of group common RNTIs configured to the user equipment.

In one implementation, in a first case, the number of bits of the first bit is determined by a number of group common RNTIs configured to a user equipment, wherein the first case includes at least one of: the user equipment only supports the condition of broadcasting multicast service MBS; the user equipment only configures the receiving condition of the MBS service; the user equipment does not configure the cell radio network temporary identifier C-RNTI; the situation that the user equipment does not configure the RNTI of the scrambled unicast PDSCH; the UE-specific DCI only has the capability to schedule the group common PDSCH.

In one implementation, the UE-specific DCI has only the capability to schedule a group common PDSCH includes: the first parameter of the UE-specific DCI is used only for the case of scheduling a group common PDSCH, wherein the first parameter comprises at least one of: a DCI format corresponding to the UE-specific DCI; an RNTI corresponding to the UE-specific DCI; a control resource set corresponding to the UE-specific DCI; a search space corresponding to the UE-specific DCI; and the transmission configuration corresponding to the UE-specific DCI indicates TCI.

In one implementation, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, and includes: the number of bits of the first bit is determined by a first number and a number of group common RNTIs configured by a user equipment, wherein the first number is one of: the number of RNTIs scrambling the unicast PDSCH; the number of RNTIs for partially scrambled unicast PDSCH; the number determined by the high layer configuration.

In one implementation, the number of bits of the first bit is determined by a first number and a number of group common RNTIs configured by the user equipment, and the method includes: the number of the first bits is determined by a logarithm of a sum of the first number and a number of group common RNTIs configured by the user equipment.

In one implementation, the number of bits of the first bit is determined by a first number and a number of group common RNTIs configured by the user equipment, and the method includes: in a second case, the number of bits of the first bit is determined by the first number and a number of group common RNTIs configured by the user equipment, wherein the second case comprises one of: the user equipment supports MBS service receiving and unicast service receiving; user equipment is configured with MBS service receiving and unicast service receiving; the user equipment is configured with the C-RNTI; the situation that the user equipment configures RNTI of the scrambled unicast PDSCH; the UE-specific DCI has a capability to schedule a group common PDSCH and to schedule a unicast PDSCH.

In one implementation, the UE-specific DCI having the capability to schedule a group common PDSCH and to schedule a unicast PDSCH includes: a second parameter of the UE-specific DCI with scheduling group common PDSCH capability and with scheduling unicast PDSCH capability, wherein the second parameter comprises at least one of: a format of the UE-specific DCI; an RNTI corresponding to the UE-specific DCI; a control resource set corresponding to the UE-specific DCI; a search space corresponding to the UE-specific DCI.

In one implementation, the logarithm is a base-2 logarithm.

In one implementation, the apparatus 300 may further include an obtaining module configured to obtain the number of group common RNTIs configured by the user equipment.

The apparatus for determining the downlink control information bits in the embodiment of the present application may be an apparatus, or may be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.

The apparatus for determining downlink control information bits in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.

The apparatus 300 according to the embodiment of the present invention may refer to the flow corresponding to the method 200 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions described above in the apparatus 300 are respectively for implementing the corresponding flow in the method 200 and achieving the same or equivalent technical effects, and are not described herein again for brevity. Optionally, as shown in fig. 4, an embodiment of the present application further provides a communication device 400, which includes a processor 401, a memory 402, and a program or an instruction stored in the memory 402 and executable on the processor 401, for example, when the communication device 400 is a terminal, the program or the instruction is executed by the processor 401 to implement the processes of the embodiment of the method for determining downlink control information bits, and the same technical effect can be achieved. When the communication device 400 is a network-side device, the program or the instruction is executed by the processor 401 to implement the processes of the above-mentioned method for determining downlink control information bits, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Specifically, the embodiment of the application further provides a network side device. As shown in fig. 5, the network device 500 includes: antenna 501, radio frequency device 502, baseband device 503. The antenna 501 is connected to a radio frequency device 502. In the uplink direction, the rf device 502 receives information through the antenna 501, and sends the received information to the baseband device 503 for processing. In the downlink direction, the baseband device 503 processes information to be transmitted and transmits the information to the radio frequency device 502, and the radio frequency device 502 processes the received information and transmits the processed information through the antenna 501.

The above band processing means may be located in the baseband means 503, and the method performed by the network side device in the above embodiment may be implemented in the baseband means 503, where the baseband means 503 includes a processor 504 and a memory 505.

The baseband device 503 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in the figure, one of the chips, for example, a processor 504, is connected to a memory 505, so as to call up a program in the memory 505 to perform the network device operations shown in the above method embodiments.

The baseband device 503 may further include a network interface 506, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 502.

Specifically, the network side device according to the embodiment of the present invention further includes: instructions or programs stored on the memory 505 and executable on the processor 504, the processor 504 calls the instructions or programs in the memory 505 to perform:

the specific steps executed by the processor 504 are as the method executed by the steps shown in fig. 2, and the same technical effects are achieved, and are not described herein for avoiding repetition.

Fig. 6 is a schematic diagram of a hardware structure of a terminal device for implementing the embodiment of the present application.

The terminal device 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and the like.

Those skilled in the art will appreciate that the terminal device 600 may further include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 610 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal device structure shown in the figures does not constitute a limitation of the terminal device, and the terminal device may include more or less components than those shown in the figures, or combine some components, or arrange different components, and thus, the description is omitted here.

It is to be understood that, in the embodiment of the present application, the input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics Processing Unit 6041 processes image data of a still picture or a video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 607 includes a touch panel 6071 and other input devices 6072. A touch panel 6071, also referred to as a touch screen. The touch panel 6071 may include two parts of a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 601 receives downlink data from a network side device and then processes the downlink data in the processor 610; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 609 may be used to store software programs or instructions as well as various data. The memory 609 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 609 may include a high-speed random access memory, and may further include a nonvolatile memory, wherein the nonvolatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (erasabprom, EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 610 may include one or more processing units; alternatively, the processor 610 may integrate an application processor, which primarily handles operating system, user interface, and applications or instructions, etc., and a modem processor, which primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The processor 610 is configured to, when a group common physical downlink shared channel PDSCH is scheduled through UE-specific downlink control information DCI, use a first bit in the UE-specific DCI to indicate a radio network temporary identity RNTI used for scrambling the PDSCH, where a bit number of the first bit is determined by a number of group common RNTIs configured to user equipment.

In one implementation, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, and includes: in a first case, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, wherein the first case comprises at least one of: the user equipment only supports the condition of broadcasting multicast service MBS; the user equipment only configures the receiving condition of the MBS service; the user equipment does not configure the cell radio network temporary identifier C-RNTI; the situation that the user equipment does not configure the RNTI of the scrambled unicast PDSCH; the UE-specific DCI only has the capability to schedule the group common PDSCH.

In one implementation, the UE-specific DCI has only the capability to schedule a group common PDSCH includes: the first parameter of the UE-specific DCI is used only for the case of scheduling a group common PDSCH, wherein the first parameter comprises at least one of: a DCI format corresponding to the UE-specific DCI; an RNTI corresponding to the UE-specific DCI; a control resource set corresponding to the UE-specific DCI; a search space corresponding to the UE-specific DCI; the transmission configuration indication TCI corresponding to the UE-specific DCI.

In one implementation, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, and includes: the number of bits of the first bit is determined by a first number and a number of group common RNTIs configured by a user equipment, wherein the first number is one of: number of RNTIs scrambling unicast PDSCH; the number of RNTIs for partially scrambled unicast PDSCH; the number determined by the high layer configuration.

In one implementation, the logarithm is a base-2 logarithm.

The terminal device 600 according to the embodiment of the present invention may refer to the flow corresponding to the method 200 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the terminal device 600 are respectively for implementing the corresponding flow in the method 200 and achieving the same or equivalent technical effects, and for brevity, no further description is provided herein.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above method for determining a downlink control information bit, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the method for determining downlink control information bits, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program product comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps of the method according to the first aspect.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for determining downlink control information bits, the method being performed by a communication device, the method comprising:

under the condition that a group common Physical Downlink Shared Channel (PDSCH) is scheduled through terminal UE specific Downlink Control Information (DCI), a first bit in the UE specific DCI is used for indicating a Radio Network Temporary Identifier (RNTI) used by scrambling of the PDSCH, and the number of bits of the first bit is determined by the number of the group common RNTIs configured for user equipment.

2. The method of claim 1, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to user equipment, comprising:

the number of bits of the first bit is determined by a logarithm of the number of group common RNTIs configured to the user equipment.

3. The method of claim 1, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to user equipment, comprising:

in a first case, the number of bits of the first bit is determined by the number of group common RNTIs configured to the user equipment, wherein the first case comprises at least one of:

the user equipment only supports the condition of broadcasting multicast service MBS;

the user equipment only configures the receiving condition of the MBS service;

the user equipment does not configure the cell radio network temporary identifier C-RNTI;

the user equipment does not configure the RNTI of the scrambled unicast PDSCH;

the UE-specific DCI only has the capability to schedule the group common PDSCH.

4. The method of claim 3, wherein the UE-specific DCI has only capability to schedule a group common PDSCH, comprising:

the first parameter of the UE-specific DCI is used only for the case of scheduling a group common PDSCH, wherein the first parameter comprises at least one of:

a DCI format corresponding to the UE-specific DCI;

an RNTI corresponding to the UE-specific DCI;

a control resource set corresponding to the UE-specific DCI;

a search space corresponding to the UE-specific DCI;

the transmission configuration indication TCI corresponding to the UE-specific DCI.

5. The method of claim 1, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to user equipment, comprising:

the number of bits of the first bit is determined by a first number and a number of group common RNTIs configured by a user equipment, wherein the first number is one of:

the number of RNTIs scrambling the unicast PDSCH;

the number of RNTIs for partially scrambled unicast PDSCH;

the number determined by the high layer configuration.

6. The method of claim 5, wherein the number of bits of the first bit is determined by a first number and a number of user equipment configured group common RNTIs, comprising:

the number of the first bits is determined by a logarithm of a sum of the first number and a number of group common RNTIs configured by the user equipment.

7. The method of claim 5, wherein the number of bits of the first bit is determined by a first number and a number of user equipment configured group common RNTIs, comprising:

in a second case, the number of bits of the first bit is determined by the first number and a number of group common RNTIs configured by the user equipment, wherein the second case comprises one of:

the user equipment supports the receiving of MBS service and supports the receiving of unicast service;

user equipment is configured with MBS service receiving and unicast service receiving;

the user equipment is configured with the C-RNTI;

the situation that the user equipment configures RNTI of the scrambled unicast PDSCH;

UE specific DCI has the capability to schedule group common PDSCH and to schedule unicast PDSCH.

8. The method of claim 7, wherein the UE-specific DCI with the capability of scheduling group common PDSCH and scheduling unicast PDSCH comprises:

a second parameter of the UE-specific DCI with scheduling group common PDSCH capability and with scheduling unicast PDSCH capability, wherein the second parameter comprises at least one of:

a format of the UE-specific DCI;

an RNTI corresponding to the UE-specific DCI;

a control resource set corresponding to the UE-specific DCI;

a search space corresponding to the UE-specific DCI.

9. The method of claim 2 or 6, wherein the logarithm is a base-2 logarithm.

10. An apparatus for determining downlink control information bits, comprising:

a determining module, configured to, when a group common physical downlink shared channel PDSCH is scheduled through UE-specific downlink control information DCI, use a first bit in the UE-specific DCI to indicate a radio network temporary identifier RNTI used for scrambling the PDSCH, where a bit number of the first bit is determined by a number of group common RNTIs configured to user equipment.

11. The apparatus of claim 10, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to a user equipment, and wherein the number of bits comprises:

12. The apparatus of claim 10, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to user equipment, comprising:

the user equipment only configures the receiving condition of the MBS service;

the UE-specific DCI only has the capability to schedule the group common PDSCH.

13. The apparatus of claim 12, wherein the UE-specific DCI has only a capability case of scheduling a group common PDSCH, comprising:

a DCI format corresponding to the UE-specific DCI;

an RNTI corresponding to the UE-specific DCI;

a control resource set corresponding to the UE-specific DCI;

a search space corresponding to the UE-specific DCI;

14. The apparatus of claim 10, wherein the number of bits of the first bit is determined by a number of group common RNTIs configured to user equipment, comprising:

the number of RNTIs scrambling the unicast PDSCH;

the number of RNTIs for partially scrambled unicast PDSCH;

the number determined by the high layer configuration.

15. The apparatus of claim 14, wherein the number of bits of the first bit is determined by a first number and a number of user equipment configured group common RNTIs, comprising:

16. The apparatus of claim 15, wherein the number of bits of the first bit is determined by a first number and a number of user equipment configured group common RNTIs, comprising:

the user equipment supports MBS service receiving and unicast service receiving;

the user equipment is configured with the C-RNTI;

17. The apparatus of claim 16, wherein the UE-specific DCI having the capability to schedule a group common PDSCH and to schedule a unicast PDSCH comprises:

a format of the UE-specific DCI;

an RNTI corresponding to the UE-specific DCI;

a control resource set corresponding to the UE-specific DCI;

a search space corresponding to the UE-specific DCI.

18. The apparatus of claim 12 or 16, wherein the logarithm is a base-2 logarithm.

19. A terminal device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the method of determining downstream control information bits according to any one of claims 1 to 9.

20. A network device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the method of determining downstream control information bits according to any one of claims 1-9.

21. A readable storage medium, on which a program or instructions are stored, which program or instructions, when executed by a processor, carry out the steps of the method of determining downlink control information bits according to any one of claims 1-9.