WO2022116014A1

WO2022116014A1 - Tbs determining method

Info

Publication number: WO2022116014A1
Application number: PCT/CN2020/133174
Authority: WO
Inventors: 余健; 余雅威; 郭志恒
Original assignee: 华为技术有限公司
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2022-06-09
Also published as: CN116530137A; WO2022116458A1

Abstract

Provided in the embodiments of the present application is a TBS determining method, related to the field of communications, and capable of preventing TBS calculation inaccuracy leading to data transmission errors and resource wastage. The method is: receiving control information transmitted by a network device and determining, on the basis of the control information, at least two slots used for transmitting data; determining the number of resource elements (RE) that each PRB in the at least two slots comprises and used for bearing information bits, the number of REs that each PRB comprises and used for bearing information bits being determined on the basis of the number of subcarriers that each PRB comprises, of the number of OFDM symbols of a PUSCH or a PDSCH that the at least two slots comprise, and of the overhead of each slot in the at least two slots, where the at least two slots comprise a first slot and a second slot, the overhead of the first slot is different from that of the second slot, or the number of OFDM symbols of the PUSCH or the PDSCH that the first slot comprises is different from that of the second slot; and determining a TBS on the basis of the number of REs that each PRB comprises and used for bearing information bits. The embodiments of the present application are applicable in 5G NR.

Description

A TBS Determination Method

technical field

The present application relates to the field of communications, and in particular, to a method for determining a transport block size (TBS).

Background technique

In a wireless communication system, communication can be classified into different types according to different types of transmitting nodes and receiving nodes. Generally, the process of sending information from the network device to the terminal device is called downlink (downlink, DL) communication, and the process of sending information from the terminal device to the network device is called uplink (uplink, UL) communication. In the fourth generation (4G) and fifth generation (5G) new wireless (New radio, NR) communication systems, a demodulation reference signal (DMRS) and a sounding reference signal (sounding) are defined. reference signal, SRS). Among them, DMRS is used for physical uplink shared channel (physical uplink shared channel, PUSCH) data demodulation. The SRS signal is used for channel state information (CSI) measurement. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI) and SRS Resource indicator (SRS resource indicator, SRI), etc.

During PUSCH transmission, the 5G NR protocol supports the transmission of one transport block (TB) (contained data) per time slot. As shown in FIG. 1 , TB1 may be transmitted on time slot 1 and TB2 may be transmitted on time slot 2 . For a frame structure with many uplink time slots (such as "DSUUU"), when performing uplink scheduling, it is necessary to indicate scheduling information such as time-frequency resource allocation, modulation, and coding for uplink transmission. Information will lead to more downlink overhead, for example, will lead to physical downlink control channel (physical downlink control channel, PDCCH) resource shortage.

SUMMARY OF THE INVENTION

The embodiment of the present application provides a TBS determination method, which can reduce control signaling overhead.

In a first aspect, an embodiment of the present application provides a method for determining a transport block size TBS, which is applied to a terminal device, including: receiving control information sent by a network device, and determining at least two time slots for data transmission according to the control information; determining at least two time slots for data transmission; The number of resource element REs for carrying information bits included in each physical resource block PRB in the two time slots, and the number of REs for carrying information bits included in each PRB is based on the number of subcarriers included in each PRB , the number of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the number of each time slot in the at least two time slots The overhead is determined; wherein, at least two time slots include a first time slot and a second time slot, the overheads of the first time slot and the second time slot are different, or the PUSCH or PDSCH included in the first time slot and the second time slot The number of OFDM symbols is different; the TBS is determined according to the number of REs included in each PRB for carrying information bits.

Based on the method provided by the embodiment of the present application, when calculating TBS, the number of PUSCH or PDSCH OFDM symbols in each time slot in at least two time slots and the overhead of each time slot are considered, so that TBS can be calculated more accurately, It is conducive to the improvement of resource utilization, and avoids data transmission errors and resource waste caused by inaccurate TBS calculation. For example, on the one hand, it avoids unnecessary retransmission caused by too large calculated TBS, resulting in waste of resources and increased delay in retransformation; waste problem.

In a possible implementation manner, determining the TBS according to the number of REs included in each PRB for carrying information bits includes: determining N corresponding to the terminal equipment according to the number of REs included in each PRB for carrying information bits The number of REs included in the PRB for carrying information bits, N is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode and transmission layer number of the terminal device, and the number of REs included in the N PRBs for bearing The number of REs of information bits determines the number of information bits of data that can be transmitted in at least two time slots; the TBS is determined according to the number of information bits of data that can be transmitted in at least two time slots.

In a possible implementation manner, determining the number of resource elements REs for carrying information bits included in each physical resource block PRB in the at least two time slots includes: determining each PRB corresponding to the PUSCH in the at least two time slots The number of included REs for carrying information bits; or determining the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in at least two time slots.

In a possible implementation manner, the overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of high-layer signaling configuration, At least one of the REs included in the sounding reference signal SRS or the number of muted REs, the muted REs include REs with zero power; the overhead of the second time slot includes REs included in the DMRS CDM group that does not transmit data on the second time slot At least one of the number of , the overhead of higher layer signaling configuration, the sounding reference signal SRS or the number of muted REs.

In a possible implementation manner, the first time slot includes a DMRS CDM group without data transmission, and the second time slot does not include a DMRS CDM group without transmission data.

In a possible implementation manner, in uplink transmission, the overhead of each time slot in at least two time slots further includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, at least two time slots The overhead of each slot in the slot also includes the number of REs occupied by the uplink symbols in each slot.

In a possible implementation manner, the PRBs respectively corresponding to the first time slot and/or the second time slot include more than 156 REs for carrying information bits.

In a possible implementation manner, determining the TBS according to the number of REs for carrying information bits included in each PRB includes: determining the TBS according to the number of REs for carrying information bits included in each PRB and a scaling factor; wherein , the value of the scaling factor of TBS is based on the number of REs used to carry information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the corresponding number of REs in the first time slot of the at least two time slots by the terminal equipment The number of REs for carrying information bits included in the N PRBs is determined.

In a possible implementation manner, determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots includes:

Wherein, N' _RE represents the number of resource element REs for carrying information bits included in each physical resource block PRB in at least two time slots,

represents the number of subcarriers included in a PRB in the frequency domain,

represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH,

represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,

Overhead configured for higher layer signaling,

Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M _start is the start time slot index of the scheduled PUSCH or PDSCH, M _end is the end slot index of the scheduled PUSCH or PDSCH.

In a possible implementation manner, determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:

N _RE =min(156·(M _end -M _start +1),N' _RE )·n _PRB

or

Among them, N _RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' _RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots ,

Indicates the number of subcarriers included in a PRB in the frequency domain, M _start is the start slot index of the scheduled PUSCH or PDSCH, M _end is the end slot index of the scheduled PUSCH or PDSCH, n _PRB is the base station allocated to the terminal number of PRBs.

N _RE =N' _RE ·n _PRB

Among them, N _RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' _RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots , n _PRB is the number of PRBs allocated by the base station to the terminal.

In a possible implementation manner, determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes: according to the scaling factor and each The number of REs for carrying information bits included in the PRBs determines the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device; wherein, the scaling factor is based on the N corresponding to the terminal device in at least two time slots. The number of REs used to carry information bits included in each PRB is determined by the number of REs used to carry information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device, including:

where K is the scaling factor,

represents the number of subcarriers included in a PRB in the frequency domain,

Indicates the overhead of higher layer signaling configuration,

In a second aspect, an embodiment of the present application provides a method for determining a TBS, which is applied to a network device, including: sending control information to a terminal device, where the control information is used to indicate at least two time slots for data transmission; determining at least two time slots The number of resource element REs used for carrying information bits included in each physical resource block PRB in the slot, and the number of REs used for carrying information bits included in each PRB is based on the number of subcarriers included in each PRB, at least two It is determined by the number of OFDM symbols of the physical uplink shared channel PUSCH or physical downlink shared channel PDSCH included in the time slots, and the overhead of each time slot in the at least two time slots; wherein the at least two time slots include the first time slot and the second time slot, the overhead of the first time slot and the second time slot is different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different; The number of REs of information bits determines the TBS.

represents the number of subcarriers included in a PRB in the frequency domain,

Overhead configured for higher layer signaling,

N _RE =min(156·(M _end -M _start +1),N' _RE )·n _PRB

or

N _RE =N' _RE ·n _PRB

where K is the scaling factor,

represents the number of subcarriers included in a PRB in the frequency domain,

Indicates the overhead of higher layer signaling configuration,

In a third aspect, an embodiment of the present application provides a communication apparatus, including: a receiving unit, configured to receive control information sent by a network device, and determine at least two time slots for data transmission according to the control information; a processing unit, configured to determine The number of resource element REs used for carrying information bits included in each physical resource block PRB in at least two time slots, and the number of REs used for carrying information bits included in each PRB is based on the subcarriers included in each PRB. The number, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include The first time slot and the second time slot, the overhead of the first time slot and the second time slot are different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different; The TBS is determined according to the number of REs included in each PRB for carrying information bits.

In a possible implementation manner, the processing unit is configured to: determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, N It is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode, and number of transmission layers of the terminal device, and the number of REs used to carry information bits included in the N PRBs, it is determined that at least two time slots can The number of information bits of the transmitted data; the TBS is determined according to the number of information bits of the data that can be transmitted in at least two time slots.

In a possible implementation manner, the processing unit is configured to: determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or determine the number of REs corresponding to the PDSCH in the at least two time slots The number of REs included in each PRB for carrying information bits.

In a possible implementation manner, the processing unit is configured to: determine the TBS according to the number of REs used for carrying information bits included in each PRB and the scaling factor; wherein, the value of the scaling factor of the TBS is based on the terminal equipment at least The number of REs used for carrying information bits included in the N PRBs corresponding to two time slots and the number of REs used for carrying information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device; Quantity is determined.

In one possible implementation:

represents the number of subcarriers included in a PRB in the frequency domain,

Overhead configured for higher layer signaling,

In one possible implementation:

N _RE =min(156·(M _end -M _start +1),N' _RE )·n _PRB

or

In one possible implementation:

N _RE =N' _RE ·n _PRB

In a possible implementation manner, the processing unit is configured to: determine, according to the scaling factor and the number of REs included in each PRB for carrying information bits, the number of REs included in the N PRBs corresponding to the terminal device and used for carrying information bits. Quantity; wherein, the scaling factor is based on the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the N corresponding to the first time slot of the terminal equipment in the at least two time slots The number of REs used to carry information bits included in each PRB is determined, including:

where K is the scaling factor,

represents the number of subcarriers included in a PRB in the frequency domain,

Indicates the overhead of higher layer signaling configuration,

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including: a sending unit configured to send control information to a terminal device, where the control information is used to indicate at least two time slots used for data transmission; a processing unit configured to determine The number of resource element REs used for carrying information bits included in each physical resource block PRB in at least two time slots, and the number of REs used for carrying information bits included in each PRB is based on the subcarriers included in each PRB. The number, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include The first time slot and the second time slot, the overhead of the first time slot and the second time slot are different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different; The TBS is determined according to the number of REs included in each PRB for carrying information bits.

In a possible implementation manner, the processing unit is configured to: determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, N is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode and transmission layer number of the terminal device, and the number of REs used to carry information bits included in the N PRBs, determine the number of at least two time slots. The number of information bits of data that can be transmitted; TBS is determined according to the number of information bits of data that can be transmitted in at least two time slots.

In a possible implementation manner, the processing unit is configured to: determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or determine the corresponding PDSCH in the at least two time slots The number of REs that each PRB includes for carrying information bits.

In a possible implementation manner, the processing unit is configured to: determine the TBS according to the number of REs used for carrying information bits included in each PRB and the scaling factor; wherein, the value of the scaling factor of the TBS is based on the The number of REs used for carrying information bits included in the N PRBs corresponding to at least two time slots and the REs used for carrying information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device number is determined.

represents the number of subcarriers included in a PRB in the frequency domain,

Overhead configured for higher layer signaling,

N _RE =min(156·(M _end -M _start +1),N' _RE )·n _PRB

or

In one possible implementation:

N _RE =N' _RE ·n _PRB

In a possible implementation manner, the processing unit is configured to: determine, according to the scaling factor and the number of REs included in each PRB for carrying information bits, the REs included in the N PRBs corresponding to the terminal device and used for bearing information bits The scaling factor is based on the number of REs used to carry information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the terminal equipment corresponds to the first time slot of the at least two time slots The number of REs for carrying information bits included in the N PRBs is determined, including:

where K is the scaling factor,

represents the number of subcarriers included in a PRB in the frequency domain,

Indicates the overhead of higher layer signaling configuration,

In a fifth aspect, an embodiment of the present application provides a communication device, the device exists in the form of a chip, the structure of the device includes a processor and a memory, and the memory is used for coupling with the processor and storing necessary programs of the device Instructions and data, the processor is used to execute the program instructions stored in the memory, so that the apparatus executes the function of the terminal device in the above method.

In a sixth aspect, an embodiment of the present application provides a communication device, which can implement the functions performed by the terminal device in any of the methods provided in the first aspect above. The functions can be implemented by hardware, or the corresponding functions can be implemented by hardware. software implementation. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the communication device includes a processor and a communication interface, and the processor is configured to support the communication device to perform corresponding functions in any one of the methods provided in the first aspect. The communication interface is used to support communication between the communication device and other network elements. The communication device may also include a memory for coupling with the processor that holds program instructions and data necessary for the communication device.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, including instructions, which, when executed on a communication device, cause the communication device to execute any one of the methods provided in the first aspect.

In an eighth aspect, an embodiment of the present application provides a computer program product including instructions, which, when executed on a communication device, causes the communication device to execute any one of the methods provided in the first aspect.

In a ninth aspect, an embodiment of the present application provides a communication device, the device exists in the form of a chip product, and the structure of the device includes a processor and a memory, the memory is used for coupling with the processor and storing necessary programs of the device Instructions and data, the processor is configured to execute the program instructions stored in the memory, so that the communication apparatus performs the function of the network device in the above method.

In a tenth aspect, an embodiment of the present application provides a communication device. The communication device can implement the functions performed by the network device in any of the methods provided in the second aspect. The functions can be implemented by hardware, or the corresponding functions can be implemented by hardware. software implementation. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the communication device includes a processor and a communication interface, and the processor is configured to support the communication device to perform corresponding functions in any one of the methods provided in the second aspect. The communication interface is used to support communication between the communication device and other network elements. The communication device may also include a memory for coupling with the processor that holds program instructions and data necessary for the communication device.

In an eleventh aspect, an embodiment of the present application provides a computer-readable storage medium, including instructions, which, when executed on a communication device, cause the communication device to execute any one of the methods provided in the second aspect.

In a twelfth aspect, an embodiment of the present application provides a computer program product including instructions, which, when executed on a communication device, causes the communication device to execute any one of the methods provided in the second aspect.

A thirteenth aspect provides a communication system, the system includes the communication device provided in the third aspect and the communication device provided in the fourth aspect, or includes the communication device provided in the third aspect and the communication device provided in the fourth aspect .

Description of drawings

Fig. 1 is a kind of schematic diagram of mapping one TB to one time slot in the prior art;

2 is a schematic diagram of a system architecture provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application;

5 is a schematic diagram of signal interaction applicable to a TBS determination method provided by an embodiment of the present application;

6 is a schematic diagram of mapping one TB to multiple time slots according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an overhead on a first time slot provided by an embodiment of the present application;

8 is a schematic diagram of overhead on different time slots provided by an embodiment of the present application;

FIG. 9 is another schematic diagram of signal interaction applicable to the TBS determination method provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of still another network device provided by an embodiment of the application.

Detailed ways

In order to describe the following embodiments clearly and concisely, a brief introduction of related concepts or technologies is first given:

At present, during PUSCH transmission, the 5G NR protocol only supports one time slot to transmit data contained in one TB. When calculating TBS, only the case of 1 TB in 1 time slot is also considered. For a frame structure with many uplink time slots (such as "DSUUU"), when performing uplink scheduling, it is necessary to indicate scheduling information such as time-frequency resource allocation, modulation, and coding for uplink transmission through downlink control indicator (DCI). . If the scheduling information is separately indicated for each uplink time slot, more downlink overhead will be caused, for example, the PDCCH resources will be tight. On the other hand, due to large path loss and severe interference, users at the edge of the cell may have a low received signal-to-interference-noise ratio and may have limited coverage.

If a TB can transmit across multiple time slots, it only needs to indicate the scheduling information once, which can effectively reduce the control signaling overhead. When a TB is transmitted across multiple time slots, a potential solution is to scale the TBS according to the number of time slots, as shown in equation (1).

_N _{inf o} =K· _NRE ·R·Qm·υ (1)

Among them, K represents the number of time slots, that is, 1 TB is mapped to K time slots for transmission. N _RE is determined according to the first slot of the K slots.

In formula (1), there are one or more of the following problems, resulting in inaccurate calculation of TBS.

1) If the number of PUSCH symbols in the first time slot is not equal to the number of PUSCH symbols in the subsequent time slot (eg, the second time slot), it will result in inaccurate N _RE calculation. For example, the number of PUSCH symbols in a special time slot is not equal to the number of symbols in a full uplink time slot.

2) In the K time slots of transmission, when the number of DMRS symbols in different time slots is different, the calculation error of TBS will be caused.

3) In the K time slots of transmission, if there is SRS transmission in a certain time slot, it will cause a large calculation error.

4) In the K time slots of transmission, if there are downlink symbols or symbols that do not send data, it will cause calculation errors of TBS.

5) In the K time slots of transmission, except for DMRS symbols, there are REs that do not send data (for example, some silent REs), which will cause calculation errors of TBS.

It is understandable that the inaccurate TBS calculation will reduce the efficiency of data transmission. If the TBS calculation is too large, it may cause data transmission errors, cause unnecessary retransmissions, increase transmission delay and cause waste of resources. If the TBS calculation is too small, the amount of transmitted data may be too small, resulting in a waste of resources.

To sum up, how to calculate TBS needs to be further discussed when multi-slots are used for TB transmission.

The present application provides a method for determining TBS, which can solve the problem that TBS calculation is inaccurate (large error) due to the different overhead of each time slot when one TB is transmitted across multiple time slots. The method includes: the terminal device determines at least two time slots for data transmission according to control information sent by the network device; determines the number of REs used for carrying information bits included in each PRB in the at least two time slots, each The number of REs included in the PRB for carrying information bits is based on the number of subcarriers included in each PRB, the number of OFDM symbols of the PUSCH or PDSCH included in at least two slots, and the number of OFDM symbols in each of the at least two slots. The overhead of the slot is determined; wherein, at least two time slots include a first time slot and a second time slot, and the overheads of the first time slot and the second time slot are different; according to the REs included in each PRB for carrying information bits The quantity determines the TBS. Since at least two time slots are used for data transmission, that is, one TB can be mapped to at least two time slots, scheduling information (time-frequency resource allocation, modulation, coding, etc.) can be indicated once for the at least two time slots, and there is no need to separately Indicating scheduling information for each time slot can reduce control signaling overhead.

Moreover, if one TB is mapped to multiple time slots, the frequency domain resources transmitted in each time slot are less, then under the same transmit power, the power spectral density of cross-slot transmission is compared with that of single-slot transmission (each time slot transmission). Hertz transmit power) is higher, which is beneficial to improve the performance of channel estimation. In addition to the aforementioned advantages, TB transmission across multiple time slots can also reduce cyclic redundancy check (CRC) overhead.

In addition, since TB transmission across multiple time slots may increase a certain processing delay and complexity, it is more suitable for some services or scenarios that are not sensitive to delay.

The TBS determination method provided in the embodiment of the present application may be applied to a 4G communication system, a 5G communication system, or a future mobile communication system. For example, the NR system applied to 5G.

FIG. 2 is a schematic diagram of a communication system to which the technical solutions provided in the embodiments of the present application are applied, and the communication system may include a network device 100 and one or more terminal devices 200 connected to the network device 100 (FIG. 2 only shows 1). Data transmission can be performed between network equipment and terminal equipment.

The network device 100 may be a device capable of communicating with the terminal device 200 . For example, the network device 100 may be a base station, which may be an evolved NodeB (evolved NodeB, eNB or eNodeB) in LTE, a base station in NR, or a relay station or access point, or a base station in a future network etc., which are not limited in the embodiments of the present application. The base station in the NR may also be referred to as a transmission reception point (transmission reception point, TRP) or a gNB. In this embodiment of the present application, the network device may be an independently sold network device, such as a base station, or a chip that implements corresponding functions in the network device. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.

The terminal device 200 in this embodiment of the present application may also be referred to as a terminal, which may be a device with a wireless transceiver function, and the terminal may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it may also be deployed in On the water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal equipment may be user equipment (user equipment, UE). Wherein, the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function. The terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on. In this embodiment of the present application, the terminal device may be a terminal sold independently, or may be a chip in the terminal. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the terminal being a terminal device as an example.

The network device 100 or the terminal device 200 in FIG. 2 in this embodiment of the present application may be implemented by one device, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application. It is to be understood that the above functions can be either network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform), or a system-on-a-chip. . In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

For example, the apparatus for implementing the function of the terminal device provided by the embodiment of the present application may be implemented by the apparatus 300 in FIG. 3 . FIG. 3 is a schematic diagram of a hardware structure of an apparatus 300 according to an embodiment of the present application. The apparatus 300 includes at least one processor 301, which is configured to implement the functions of the terminal device provided by the embodiments of the present application. The apparatus 300 may also include a bus 302 and at least one communication interface 304 . A memory 303 may also be included in the apparatus 300 .

In this embodiment of the present application, the processor may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, or a controller, microcontroller, programmable logic device (PLD), or any combination thereof. The processor may also be any other apparatus having processing functions, such as a circuit, a device or a software module.

The bus 302 may be used to transfer information between the aforementioned components.

The communication interface 304 is used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN) and the like. The communication interface 304 may be an interface, a circuit, a transceiver or other devices capable of implementing communication, which is not limited in this application. Communication interface 304 may be coupled to processor 301 . The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.

In this embodiment of the present application, the memory may be a read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, a random access memory (RAM) or a storage device capable of storing static information and instructions. Other types of dynamic storage devices for information and instructions, which may also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or Other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disc storage medium or other magnetic storage device, or capable of being used to carry or store desired in the form of instructions or data structures Program code and any other medium that can be accessed by a computer, but is not limited thereto. The memory can exist independently or be coupled to the processor, such as through bus 302 . The memory can also be integrated with the processor.

The memory 303 is used for storing program instructions, and can be controlled and executed by the processor 301, thereby implementing the method for sending a random access message provided by the following embodiments of the present application. The processor 301 is configured to invoke and execute the instructions stored in the memory 303, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.

Optionally, the computer instructions in the embodiments of the present application may also be referred to as program codes, which are not specifically limited in the embodiments of the present application.

Optionally, memory 303 may be included in processor 301 .

In a specific implementation, as an embodiment, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3 .

In a specific implementation, as an embodiment, the apparatus 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3 . Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a specific implementation, as an embodiment, the apparatus 300 may further include an output device 305 and an input device 306 . Output device 305 is coupled to processor 301 and can display information in a variety of ways. For example, the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. Input device 306 is coupled to processor 301 and can receive user input in a variety of ways. For example, the input device 306 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

The above-mentioned apparatus 300 may be a general-purpose device or a special-purpose device. In a specific implementation, the terminal device 300 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in FIG. 3 . equipment. This embodiment of the present application does not limit the type of the apparatus 300 .

For example, the apparatus for implementing the function of the network device provided by the embodiment of the present application may be implemented by the apparatus 400 in FIG. 4 . FIG. 4 is a schematic diagram of a hardware structure of an apparatus 400 according to an embodiment of the present application. The apparatus 400 includes at least one processor 401, which is configured to implement the functions of the terminal device provided by the embodiments of the present application. The apparatus 400 may also include a bus 402 and at least one communication interface 404 . A memory 403 may also be included in the apparatus 400 .

The bus 402 may be used to transfer information between the aforementioned components.

A communication interface 404 for communicating with other devices or communication networks, such as Ethernet, RAN, WLAN, and the like. The communication interface 404 may be an interface, a circuit, a transceiver or other devices capable of implementing communication, which is not limited in this application. Communication interface 404 may be coupled to processor 401 .

The memory 403 is used for storing program instructions, and can be controlled and executed by the processor 401, thereby implementing the method for sending a random access message provided by the following embodiments of the present application. For example, the processor 401 is configured to invoke and execute the instructions stored in the memory 403, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.

Optionally, memory 403 may be included in processor 401 .

In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .

In a specific implementation, as an embodiment, the apparatus 400 may include multiple processors, such as the processor 401 and the processor 407 in FIG. 4 . Each of these processors can be a single-core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the present application, unless otherwise specified, "at least one" refers to one or more, and "a plurality" refers to two or more than two. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same items or similar items that have basically the same function and effect. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like are not necessarily different.

For ease of understanding, the method for sending a random access message provided by the embodiments of the present application will be specifically introduced below with reference to the accompanying drawings.

As shown in FIG. 5 , an embodiment of the present application provides a method for determining TBS, including:

501. The network device sends control information to the terminal device.

The control information is used to indicate at least two time slots for transmitting data. Wherein, the at least two time slots can be used to transmit one TB. The control information may be, for example, downlink control information (downlink control information, DCI), and the DCI may indicate the starting OFDM symbol index and the total symbol length of the scheduled PUSCH or PDSCH.

Exemplarily, as shown in FIG. 6, TB1 may be transmitted on time slot 1 and time slot 2, ie, TB may be transmitted across multiple (two) time slots. Each TB needs to be added with CRC during transmission. If a TB is transmitted in one time slot, CRC needs to be added to each time slot; if a TB is transmitted across multiple time slots, there is no need to add CRC to each time slot. The CRC can be added once in multiple time slots, thereby reducing the time-frequency resources occupied by the CRC. When the given frequency domain resources are certain, the increase of time domain resources for transmitting a TB will increase the TBS, and the coding code length may increase, so as to obtain more coding gains. Assuming that the transmitted TBS remains unchanged, if the time domain resources for transmitting one TB are increased, the frequency domain resources can be correspondingly reduced. In this way, under the same total transmit power, the fewer the frequency domain resources, the higher the transmit power on each subcarrier, which is beneficial to obtain better channel estimation performance. In addition, when multiple timeslots are continuously transmitted, the joint channel estimation of multiple timeslots can be combined to improve the readiness of the channel estimation, and at the same time, the DMRS overhead can be reduced.

In addition, the expansion of the time domain resources of TB will correspondingly increase the transmission delay, which is more suitable for some delay-insensitive services or scenarios.

502. The terminal device receives the control information sent by the network device.

The terminal device may determine at least two time slots for transmitting data according to the control information.

503. The terminal device determines the number of REs for carrying information bits included in each PRB in the at least two time slots.

It will be appreciated that each PRB may be transmitted across at least two time slots. Wherein, the number of REs included in each PRB for carrying information bits is based on the number of subcarriers included in each PRB, the number of PUSCH or PDSCH OFDM symbols included in at least two time slots, and the number of at least two time slots The cost of each slot in is determined. Among them, REs used to carry information bits may be called valid REs. It should be noted that when a TB is transmitted across multiple time slots, the amount of data carried by each time slot will be different due to the different overhead or the number of valid REs in each time slot. Therefore, when calculating the TBS, it is necessary to consider each time slot. Overhead in time slot.

The at least two time slots may include a first time slot and a second time slot, the overhead of the first time slot and the second time slot being different. Alternatively, the number of OFDM symbols of the PUSCH or PDSCH included in the first slot and the second slot is different. The overhead of the first time slot may include at least one of the number of REs included in the DMRS CDM group that does not transmit data on the first time slot, the overhead configured by higher layer signaling, and the number of SRS or muted REs. The overhead of the second time slot includes at least one of the number of REs included in the DMRS CDM group that does not transmit data on the second time slot, the overhead of higher layer signaling configuration, and the number of SRS or muted REs.

In a possible implementation manner, the first time slot includes a DMRS CDM group without data transmission, and the second time slot does not include a DMRS CDM group without transmission data. The fact that the first time slot includes a DMRS CDM group that does not transmit data may mean that S groups of DMRS CDM groups are configured on the first time slot, wherein, L groups of DMRS CDM groups do not transmit data, but transmit DMRS. Wherein, S and L are integers greater than or equal to 1, and S is greater than or equal to L. The fact that the second time slot does not include a DMRS CDM group that does not transmit data may mean that no DMRS CDM group is configured on the second time slot; or, a P group of DMRS CDM groups is configured on the first time slot, wherein, Group G DMRS The CDM group is used to transmit data, not DMRS. Wherein, P and G are integers greater than or equal to 1, and P is greater than or equal to G.

Exemplarily, as shown in FIG. 7 , the DMRS CDM group that does not transmit data on the first time slot may include 6 groups, and each group of DMRS CDM may include 8 REs. The DMRS CDM group used for data transmission may include one group, the DMRS CDM group not used for data transmission may include 5 groups, the DMRS CDM group not used for data transmission may be regarded as silent REs, and the silent REs may include 40 RE; the overhead of the high-layer signaling configuration on the first time slot may include 6 REs. In this way, the overhead of the first slot includes a total of 54 REs.

The silent REs may refer to REs with zero power. That is, data may be sent on silent REs without using transmit power. The muted REs can be used for interference measurement for uplink transmission or downlink transmission. In uplink transmission, the terminal device may not transmit data on the silent RE, and the network device (eg, base station) may measure the interference of neighboring cells based on the silent RE. In downlink transmission, a network device (eg, a base station) may not transmit data on the silent REs, and the terminal device may measure the interference of neighboring cells based on the silent REs.

In addition, in uplink transmission, the overhead of each time slot in at least two time slots also includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, the overhead of each time slot in at least two time slots The overhead also includes the number of REs occupied by uplink symbols in each slot.

Exemplarily, in a time division duplexing (time division duplexing, TDD) system, a frame structure 'DSUUU' may be included, wherein the frame structure may include a 'S' time slot, a 'U' time slot and a 'D' time slot. gap. The 'S' time slot includes both downlink symbols and uplink symbols, and the number of uplink symbols is usually less than 14. The 'U' time slot is an all uplink time slot, and the 'D' time slot is an all downlink time slot. It should be noted that the 'U' time slot may contain a small number of downlink symbols, and the 'D' time slot may contain a small number of uplink symbols.

Exemplarily, in uplink transmission, as shown in (a) of FIG. 8 , when 1 TB is transmitted across time slots, it can be simultaneously transmitted on the S time slot and the U time slot. In this case, the number of symbols used to transmit the PUSCH in the S slot and the U slot is not equal. For example, there are 7 symbols used to transmit PUSCH in the S slot, among which there are 6 symbols used to transmit PUSCH data, 1 symbol used to transmit DMRS, and 7 downlink symbols; in each U slot There is one symbol for transmitting DMRS, and 13 symbols for transmitting PUSCH data. In (b) of FIG. 8 , the number of DMRS symbols in different time slots is different, resulting in an unequal number of symbols available for transmitting PUSCH data in different time slots. For example, there are 2 symbols used to transmit DMRS in the first U slot, and 12 symbols used to transmit PUSCH data; there are 1 symbol used to transmit DMRS in the second U slot, which is used to transmit PUSCH data. There are 13 symbols for transmitting PUSCH data; there are 2 symbols for transmitting DMRS in the third U time slot, and 12 symbols for transmitting PUSCH data. In (c) of FIG. 8 , there is a collision of SRS or downlink symbols in some of the time slots, resulting in an unequal number of PUSCH symbols available for transmission in different time slots. For example, there are 2 symbols used to transmit DMRS in the first U slot, and 12 symbols used to transmit PUSCH data; there are 1 symbol used to transmit DMRS in the second U slot, which is used to transmit PUSCH data. There are 2 symbols for transmitting SRS or downlink data (a symbol for transmitting downlink data, that is, downlink symbols), and there are 12 symbols for transmitting PUSCH data.

When performing uplink transmission, the terminal device may determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in at least two time slots. During downlink transmission, the terminal device may determine the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in at least two time slots.

Exemplarily, the formula for calculating the number of valid REs N' _REs included in each PRB corresponding to the PUSCH or PDSCH in at least two time slots is shown in formula (1):

in,

Indicates the number of subcarriers included in a PRB in the frequency domain, which can be 12;

Overhead configured for high-layer signaling, whose value can be 6, 12 or 18,

Indicates the number of REs or muted REs included in the SRS included in the i-th slot in the at least two time slots, i is an integer greater than or equal to 1, and M _start is the start time slot of the scheduled PUSCH or PDSCH index, where M _end is the end slot index of the scheduled PUSCH or PDSCH.

Alternatively, the calculation formula of N' _RE can be as shown in formula (2-1) or formula (2-2) or formula (2-3) or formula (2-4):

in,

represents the REs included in the SRS included in the i-th slot in the at least two slots,

is the number of muted REs included in one PRB in the i-th time slot in the at least two time slots. For other parameters, refer to the relevant description of formula (1), which is not repeated here.

in,

The total symbol length of the PUSCH or PDSCH scheduled for the network device (ie, the length of an OFDM symbol included in the time domain), the PUSCH or PDSCH spans at least two time slots in the time domain.

is the number of REs included in the DMRS CDM group that does not transmit data included in the scheduled PUSCH or PDSCH symbols,

Overhead configured for higher layer signaling.

in,

Indicates that the REs included in the SRS included in the PUSCH or PDSCH span at least two time slots in the time domain,

Indicates the number of muted REs included in at least two slots. For other parameters, please refer to the relevant description of formula (2-2), which will not be repeated here.

in,

Indicates the number of REs included in the SRS included in the PUSCH or PDSCH, and the PUSCH or PDSCH spans at least two time slots in the time domain. For other parameters, please refer to the relevant description of formula (2-2) or formula (2-3), which will not be repeated here.

504. The terminal device determines the TBS according to the number of REs included in each PRB for carrying information bits.

The terminal device may determine the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs used to carry information bits included in each PRB, where N is indicated by the network device, and N is greater than or equal to 1 .

Exemplarily, according to the number of REs for carrying information bits included in each PRB, determine the number N _REs for carrying information bits included in N PRBs corresponding to the terminal device, such as Equation (3-1) or Equation ( 3-2) shown:

N _RE =min(156·(M _end -M _start +1),N' _RE )·n _PRB formula (3-1)

Wherein, n _PRB is the value of N, that is, the number of PRBs allocated by the network device to the terminal device. M _start is the start slot index of the scheduled PUSCH or PDSCH, and Men _end is the end slot index of the scheduled PUSCH or PDSCH.

Indicates the number of subcarriers included in a PRB in the frequency domain, which may be 12. N' _RE may be determined according to formula (1) or formula (2-1) or formula (2-2) or formula (2-3) or formula (2-4).

In a possible design, the PRBs corresponding to the first time slot and/or the second time slot respectively include more than 156 REs for carrying information bits. In the prior art, considering that there are at least 12 REs (corresponding to one DMRS symbol) in a time slot as overhead, it is defined that a maximum of 156 valid REs in a PRB in a time slot are defined. In the subsequent evolution of the standard, the case where no DMRS is sent in one time slot can be supported, and at this time, the number of valid REs of one PRB in one time slot can be greater than 156.

That is to say, with the evolution of the standard, DMRS may not be sent. At this time, the calculation formula of N _RE can be formula (4):

N _RE =N' _RE ·n _PRB formula (4)

When the DMRS is not sent in a time slot, the influence of the DMRS overhead limitation is removed, the upper limit of the number of valid REs in each PRB is increased, and the TBS can be made larger and more data can be transmitted.

Further, the terminal device can determine the information bits of the data that can be transmitted in at least two time slots according to the corresponding code rate, modulation mode and transmission layer number of the terminal device and the number of REs included in the N PRBs for carrying information bits. number, as shown in formula (5):

N _info =N _RE ·R·Q _m ·υ Equation (5)

Among them, N _info is the number of information bits of data that can be transmitted by at least two time slots, R is the code rate, Q _m is the modulation mode, and υ is the number of layers or streams to be transmitted.

Finally, the terminal device can determine the TBS according to the number of information bits of data that can be transmitted in at least two time slots. For the detailed process, please refer to the standard document 3GPP TS 38.214, which will not be repeated here.

In addition, the network device may also determine the number of REs included in each PRB in the at least two time slots for carrying information bits, and the number of REs included in each PRB for carrying information bits is based on the number of REs included in each PRB The number of carriers, the number of OFDM symbols of the PUSCH or PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include the first time slot and the second time slot. Two time slots, the overheads of the first time slot and the second time slot are different; the TBS is determined according to the number of REs included in each PRB for carrying information bits. For the process, reference may be made to the relevant descriptions of step 503 and step 504, which will not be repeated here.

As shown in FIG. 9 , an embodiment of the present application provides a method for determining TBS, which can calculate TBS based on a scaling factor, including:

901. The network device sends control information to the terminal device.

Control information may be used to indicate each time slot used to transmit data, where one time slot may transmit one TB. That is, 1 TB can be mapped to 1 time slot. The control information may be DCI, for example.

902. The terminal device receives the control information sent by the network device.

903. The terminal device determines the number of REs included in each PRB in each time slot for carrying information bits.

Exemplarily, the formula for calculating the number of valid REs included in each PRB corresponding to the PUSCH or PDSCH in each time slot is shown in formula (6):

in,

Indicates the number of subcarriers included in a PRB in a time slot in the frequency domain, which can be 12,

represents the number of OFDM symbols allocated to PUSCH in one slot,

Represents the number of REs included in a DMRS CDM group that does not transmit data in a time slot,

Overhead configured for higher layer signaling, which can be 6, 12 or 18. If not configured,

The value of can be 0.

Optionally, a time slot may include silent REs. Due to the introduction of the silent RE, it is equivalent to adding an extra overhead of one time slot, and the UK considers this kind of overhead in the TBS calculation. Therefore, the calculation formula of N' _RE can be updated to formula (7):

in,

Including the number of silent REs contained in one PRB in one time slot, and can also use different variable names to represent the silent REs, such as available

to represent the number of silent REs included in one PRB. For other parameters, refer to the relevant description of formula (6), which is not repeated here.

904. The terminal device determines the TBS according to the number of REs included in each PRB for carrying information bits.

Exemplary, as shown in formula (8-1) or formula (8-2):

Among them, N _RE is the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, K is the scaling factor,

is the round-down function.

Among them, the calculation formula of K is shown in formula (9):

For the meaning of each parameter, reference may be made to the description of formula (1) or formula (2-1) in step 503, which is not repeated here.

That is to say, the value of the scaling factor of TBS (that is, K) is based on the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal device in at least two time slots and the number of REs used by the terminal device in at least two time slots The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot of .

Optionally, if a silent RE is further introduced, the calculation formula of K can be updated to formula (10):

Alternatively, the overhead of silent REs can also be included in

In this way, the calculation formula of K can still be formula (9).

Or, the calculation formula of K can be formula (11-1) or formula (11-2) or formula (11-3) or formula (11-4):

In formula (11-1) or formula (11-2) or formula (11-3) or formula (11-4), M _start is the start slot index of the scheduled PUSCH or PDSCH, and other parameters can refer to formula ( 2-2) or the relevant description of the formula (2-3) or the formula (2-4), which is not repeated here.

Further, the terminal device can determine the information bits of the data that can be transmitted in at least two time slots according to the corresponding code rate, modulation mode and transmission layer number of the terminal device and the number of REs included in the N PRBs for carrying information bits. number, as shown in formula (12):

N _info =N _RE ·R·Q _m ·υ Equation (12)

Wherein, N _RE is determined according to formula (8-1) or formula (8-2), and the meanings of other parameters can refer to the relevant description of formula (5), which will not be repeated here.

Finally, the terminal device can determine the TBS according to the number of information bits of data that can be transmitted in at least two time slots. The detailed process can refer to the standard document 3GPP TS 38.214.

Based on the method provided by the embodiment of the present application, when calculating TBS, the number of PUSCH or PDSCH OFDM symbols in each time slot in at least two time slots and the overhead of each time slot are considered, so that TBS can be calculated more accurately, It is conducive to the improvement of resource utilization, and avoids data transmission errors and resource waste caused by inaccurate TBS calculation. For example, on the one hand, it avoids unnecessary retransmissions caused by too large calculated TBS, resulting in wasted resources and increased delay; waste problem.

In the case where each functional module is divided according to each function, FIG. 10 shows a possible schematic structural diagram of the apparatus 10 involved in the above embodiment, the apparatus may be a terminal device, and the terminal device includes: a receiving unit 1001 and processing unit 1002.

In this embodiment of the present application, the receiving unit 1001 is configured to receive the control information sent by the network device, and determine at least two time slots for data transmission according to the control information of the present application; the processing unit 1002 is configured to determine the at least two time slots of the present application The number of resource unit REs used for carrying information bits included in each physical resource block PRB in the time slot, and the number of REs used for carrying information bits included in each PRB in this application is based on the subcarriers included in each PRB in this application The number of OFDM symbols, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots of this application, and the overhead of each time slot in the at least two time slots of this application are determined; The application for at least two time slots includes a first time slot and a second time slot, and the overhead of the first time slot of this application and the second time slot of this application are different, or the first time slot of this application and the second time slot of this application include The number of OFDM symbols of the PUSCH or PDSCH is different; the TBS of the present application is determined according to the number of REs used for carrying information bits included in each PRB of the present application.

In the method embodiments shown in FIG. 5 and FIG. 9 , the receiving unit 1001 is configured to execute the process 502 in FIG. 5 , and is configured to execute the process 902 in FIG. 9 . The processing unit 1001 is used for executing the processes 503 and 504 in FIG. 5 , and is used for executing the processes 903 and 904 in FIG. 9 . Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

In the case where each functional module is divided according to each function, FIG. 11 shows a possible schematic structural diagram of the apparatus 11 involved in the above embodiment, the apparatus may be a network device, and the network device includes: a sending unit 1101 and processing unit 1102.

In this embodiment of the present application, the sending unit 1101 is configured to send control information to the terminal device, where the control information is used to indicate at least two time slots for data transmission; the processing unit is configured to determine each of the at least two time slots The number of resource unit REs included in the physical resource block PRB for carrying information bits, the number of REs included in each PRB for carrying information bits is based on the number of subcarriers included in each PRB, and at least two time slots include The number of OFDM symbols of the physical uplink shared channel PUSCH or physical downlink shared channel PDSCH, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include the first time slot and the second time slot. slot, the overhead of the first slot and the second slot is different, or the number of PUSCH or PDSCH OFDM symbols included in the first slot and the second slot is different; the processing unit 1102 is further configured to The number of REs used to carry information bits determines the TBS.

In the method embodiments shown in FIG. 5 and FIG. 9 , the sending unit 1101 is configured to execute the process 501 in FIG. 5 and the process 901 in FIG. 9 . Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. Exemplarily, in this embodiment of the present application, the receiving unit and the sending unit may be integrated into the transceiver unit.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available media that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, solid state drives (SSDs) )Wait.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A method for determining a transport block size TBS, characterized in that, applied to a terminal device, comprising:

receiving control information sent by the network device, and determining at least two time slots for data transmission according to the control information;

Determine the number of resource element REs included in each physical resource block PRB in the at least two time slots for carrying information bits, and the number of REs included in each PRB for carrying information bits is based on the The number of subcarriers included in the PRBs, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the number of OFDM symbols in the at least two time slots. The cost of each time slot is determined; wherein, the at least two time slots include a first time slot and a second time slot, and the cost of the first time slot and the second time slot are different, or the The number of OFDM symbols of the PUSCH or PDSCH included in a time slot and the second time slot is different;

The TBS is determined according to the number of REs included in each PRB for carrying information bits.
The method according to claim 1, wherein the determining the TBS according to the number of REs used for carrying information bits included in each PRB comprises:

Determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, where N is indicated by the network device, and N is greater than or equal to 1;

The information bits of the data that can be transmitted in the at least two time slots are determined according to the code rate, modulation mode, and the number of transmission layers corresponding to the terminal device, and the number of REs included in the N PRBs for carrying information bits number;

The TBS is determined according to the number of information bits of data that can be transmitted by the at least two time slots.
The method according to claim 1 or 2, wherein determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots comprises:

determining the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or

Determine the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in the at least two time slots.
The method according to any one of claims 1-3, wherein,

The overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of the high-layer signaling configuration, and the sounding reference signal SRS includes: at least one of the number of REs or silent REs, the silent REs including zero-power REs;

The overhead of the second time slot includes at least one of the number of REs included in the DMRS CDM group that does not transmit data on the second time slot, the overhead of high-layer signaling configuration, the sounding reference signal SRS or the number of muted REs kind.
The method of claim 4, wherein:

The first time slot includes a DMRS CDM group that does not transmit data, and the second time slot does not include a DMRS CDM group that does not transmit data.
The method according to any one of claims 1-5, wherein,

In uplink transmission, the overhead of each time slot in the at least two time slots also includes the number of REs occupied by downlink symbols in each time slot;

In downlink transmission, the overhead of each time slot in the at least two time slots further includes the number of REs occupied by uplink symbols in each time slot.
The method according to any one of claims 1-6, wherein,

The PRBs corresponding to the first time slot and/or the second time slot respectively include more than 156 REs for carrying information bits.
The method according to any one of claims 1-7, wherein the determining the TBS according to the number of REs included in each PRB for carrying information bits includes:

determining the TBS according to the number of REs and a scaling factor included in each PRB for carrying information bits;

The value of the scaling factor of the TBS is based on the number of REs for carrying information bits included in the N PRBs corresponding to the at least two time slots by the terminal device and the number of REs used by the terminal device in the at least two time slots. The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot of the two time slots is determined.
The method according to any one of claims 1-8, wherein the determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots comprises:

Wherein, N' RE represents the number of resource element REs used for carrying information bits included in each physical resource block PRB in the at least two time slots,
represents the number of subcarriers included in a PRB in the frequency domain,
represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH,
represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
Overhead configured for higher layer signaling,
Indicates the number of REs or muted REs included in the SRS included in the i-th slot in the at least two time slots, i is an integer greater than or equal to 1, and Mstart is the start time slot of the scheduled PUSCH or PDSCH index, where M end is the end slot index of the scheduled PUSCH or PDSCH.
The method according to any one of claims 2-9, characterized in that, according to the number of REs included in each PRB and used to carry information bits, determining the number of REs included in the N PRBs corresponding to the terminal device The number of REs for carrying information bits includes:

N RE =min(156·(M end -M start +1),N' RE )·n PRB

or

Wherein, N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' RE represents the resources used to carry information bits included in each PRB in the at least two time slots the number of unit REs,
Indicates the number of subcarriers included in a PRB in the frequency domain, M start is the start slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH, n PRB is the base station allocated to the terminal number of PRBs.
The method according to any one of claims 2-9, characterized in that, according to the number of REs included in each PRB and used to carry information bits, determining the number of REs included in the N PRBs corresponding to the terminal device The number of REs for carrying information bits includes:

N RE =N' RE ·n PRB

Wherein, N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' RE represents the resources used to carry information bits included in each PRB in the at least two time slots The number of unit REs, n PRB is the number of PRBs allocated by the base station to the terminal.
The method according to claims 2-11, wherein the determining, according to the number of REs included in each PRB and used for carrying information bits, includes N PRBs corresponding to the terminal device for carrying information The number of bits of RE includes:

Determine the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the scaling factor and the number of REs for carrying information bits included in each PRB;

The scaling factor is based on the number of REs for carrying information bits included in the N PRBs corresponding to the at least two time slots by the terminal device and the number of REs in the at least two time slots by the terminal device. The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot is determined, including:

where K is the scaling factor,
represents the number of subcarriers included in a PRB in the frequency domain,
represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH,
represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
represents the overhead of the higher layer signaling configuration,
Indicates the number of REs or muted REs included in the SRS included in the i-th slot in the at least two time slots, i is an integer greater than or equal to 1, and Mstart is the start time slot of the scheduled PUSCH or PDSCH index, where M end is the end slot index of the scheduled PUSCH or PDSCH.
A communication device, comprising:

a receiving unit, configured to receive control information sent by the network device, and determine at least two time slots for data transmission according to the control information;

a processing unit, configured to determine the number of resource element REs used for carrying information bits included in each physical resource block PRB in the at least two time slots, and the number of REs used for carrying information bits included in each PRB is based on the number of subcarriers included in each PRB, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the at least The overhead of each of the two time slots is determined; wherein, the at least two time slots include a first time slot and a second time slot, and the overheads of the first time slot and the second time slot are different , or the number of OFDM symbols of the PUSCH or PDSCH included in the first time slot and the second time slot is different;

The processing unit is further configured to determine the TBS according to the number of REs included in each PRB for carrying information bits.
The apparatus according to claim 13, wherein the processing unit is configured to:

Determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, where N is indicated by the network device, and N is greater than or equal to 1;

The information bits of the data that can be transmitted in the at least two time slots are determined according to the code rate, modulation mode, and the number of transmission layers corresponding to the terminal device, and the number of REs included in the N PRBs for carrying information bits number;

The TBS is determined according to the number of information bits of data that can be transmitted by the at least two time slots.
The device according to claim 13 or 14, wherein the processing unit is used for:

determining the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or

Determine the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in the at least two time slots.
The device according to any one of claims 13-15, characterized in that,

The overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of the high-layer signaling configuration, and the sounding reference signal SRS includes: at least one of the number of REs or silent REs, the silent REs including zero-power REs;

The overhead of the second time slot includes at least one of the number of REs included in the DMRS CDM group that does not transmit data on the second time slot, the overhead of high-layer signaling configuration, the sounding reference signal SRS or the number of muted REs kind.
The apparatus of claim 16, wherein:

The first time slot includes a DMRS CDM group that does not transmit data, and the second time slot does not include a DMRS CDM group that does not transmit data.
The device according to any one of claims 13-17, characterized in that,

In uplink transmission, the overhead of each time slot in the at least two time slots further includes the number of REs occupied by downlink symbols in each time slot;

In downlink transmission, the overhead of each time slot in the at least two time slots further includes the number of REs occupied by uplink symbols in each time slot.
The device according to any one of claims 13-18, characterized in that,

The PRBs corresponding to the first time slot and/or the second time slot respectively include more than 156 REs for carrying information bits.
The device according to any one of claims 13-19, wherein the processing unit is configured to:

determining the TBS according to the number and scaling factor of REs included in each PRB for carrying information bits;

The value of the scaling factor of the TBS is based on the number of REs for carrying information bits included in the N PRBs corresponding to the at least two time slots by the terminal device and the number of REs used by the terminal device in the at least two time slots. The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot of the two time slots is determined.
The device according to any one of claims 13-20, characterized in that,

Wherein, N' RE represents the number of resource element REs used for carrying information bits included in each physical resource block PRB in the at least two time slots,
represents the number of subcarriers included in a PRB in the frequency domain,
represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH,
represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
Overhead configured for higher layer signaling,
Indicates the number of REs or muted REs included in the SRS included in the i-th slot in the at least two time slots, i is an integer greater than or equal to 1, and Mstart is the start time slot of the scheduled PUSCH or PDSCH index, where M end is the end slot index of the scheduled PUSCH or PDSCH.
The device according to any one of claims 14-21, characterized in that,

N RE =min(156·(M end -M start +1),N' RE )·n PRB

or

Wherein, N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' RE represents the resources used to carry information bits included in each PRB in the at least two time slots the number of unit REs,
Indicates the number of subcarriers included in a PRB in the frequency domain, M start is the start slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH, n PRB is the base station allocated to the terminal number of PRBs.
The device according to any one of claims 14-21, characterized in that,

N RE =N' RE ·n PRB

Wherein, N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device, and N' RE represents the resources used to carry information bits included in each PRB in the at least two time slots The number of unit REs, n PRB is the number of PRBs allocated by the base station to the terminal.
The apparatus according to claims 14-23, wherein the processing unit is configured to:

Determine the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the scaling factor and the number of REs for carrying information bits included in each PRB;

The scaling factor is based on the number of REs for carrying information bits included in the N PRBs corresponding to the at least two time slots by the terminal device and the number of REs in the at least two time slots by the terminal device. The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot is determined, including:

where K is the scaling factor,
represents the number of subcarriers included in a PRB in the frequency domain,
represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH,
represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
represents the overhead of the higher layer signaling configuration,
Indicates the number of REs or muted REs included in the SRS included in the i-th slot in the at least two time slots, i is an integer greater than or equal to 1, and Mstart is the start time slot of the scheduled PUSCH or PDSCH index, where M end is the end slot index of the scheduled PUSCH or PDSCH.
A communication device, characterized in that the communication device includes a processor and a memory;

The memory is used to store computer instructions, and when the communication device is in operation, the processor executes the computer instructions stored in the memory, so that the communication device performs as claimed in any one of claims 1-12. method described.
A computer-readable storage medium comprising instructions which, when executed on a communication device, cause the communication device to perform the method of any one of claims 1-12.
A computer program product, characterized in that, when the computer program product is run on a communication device, the communication device is caused to perform the method of any one of claims 1-12.