CN110830158B - Method and communication device for transmitting uplink control information - Google Patents

Method and communication device for transmitting uplink control information Download PDF

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CN110830158B
CN110830158B CN201810911047.1A CN201810911047A CN110830158B CN 110830158 B CN110830158 B CN 110830158B CN 201810911047 A CN201810911047 A CN 201810911047A CN 110830158 B CN110830158 B CN 110830158B
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harq
ack
mcs
csi
offset value
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CN110830158A (en
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李胜钰
官磊
马蕊香
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H04L1/0004—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a method and a communication device for transmitting uplink control information, which can feed back UCI according to the service type corresponding to the UCI and improve the transmission performance of the UCI. The method comprises the following steps: an MCS table corresponding to a downlink transmission is determined, which may indicate a traffic type of the downlink data transmission. And determining transmission parameters of a first HARQ-ACK performing HARQ feedback on the downlink data transmission according to the MCS table, wherein the transmission parameters of the first HARQ-ACK comprise one or more of the total number of DAIs of the first HARQ-ACK, the MCS offset value of the first HARQ-ACK and the coding rate of the first HARQ-ACK. And determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK, and transmitting the first HARQ-ACK on a first uplink channel.

Description

Method and communication device for transmitting uplink control information
Technical Field
The present application relates to the field of communications, and in particular, to a method and a communications apparatus for transmitting uplink control information.
Background
The prior art uses a unified feedback mechanism to feed back Uplink Control Information (UCI), such as hybrid automatic repeat request acknowledgement (HARQ-ACK), Channel State Information (CSI), etc., without distinguishing the feedback of the UCI. However, it is obviously not reasonable to use the same mechanism for feedback for UCI with different characteristics, such as UCI with different transmission delay or reliability requirement. Therefore, a distinction needs to be made between feedback for different UCI.
Disclosure of Invention
The application provides a method and a communication device for transmitting uplink control information, which can feed back UCI according to the service type corresponding to the UCI and improve the transmission performance of the UCI.
In a first aspect, a method for sending uplink control information is provided, where an execution main body of the method may be a terminal device, or may be a chip applied to the terminal device, and the following description takes the terminal device as the execution main body as an example. The method comprises the following steps: determining a first Modulation and Coding Scheme (MCS) table, wherein the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first HARQ-ACK; determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise one or more of the total Downlink Assignment Index (DAI) number of the first HARQ-ACK, the MCS offset value of the first HARQ-ACK and the coding rate of the first HARQ-ACK; determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK; and transmitting the first HARQ-ACK on a first uplink channel.
Therefore, in the method for transmitting uplink control information according to the embodiment of the present application, the terminal device may determine, according to the MCS table used for downlink data transmission, the transmission parameter of the HARQ-ACK for performing HARQ feedback on the downlink data transmission, so as to be capable of adapting to the requirement of the service type corresponding to the HARQ-ACK for delay and/or reliability.
With reference to the first aspect, in some implementations of the first aspect, the first uplink channel is an uplink data channel, and the transmission parameter of the first HARQ-ACK includes an MCS offset value of the first HARQ-ACK. In this case, the determining the transmission parameter of the first HARQ-ACK according to the first MCS table includes: and determining the MCS offset value of the first HARQ-ACK according to the first mapping relation set and the value in the MCS offset value bit field.
The first mapping relation set is one of N mapping relation sets, the first MCS table is one of M MCS tables, the N mapping relation sets correspond to the M MCS tables, the first mapping relation set corresponds to the first MCS table, the mapping relation set includes a corresponding relation between a value of an MCS offset value bit field and an MCS offset value when the number of bits of HARQ-ACK is different, M and N are integers greater than 1, and the MCS offset value bit field is one bit field of Downlink Control Information (DCI) for scheduling the downlink data transmission.
Specifically, the MCS offset value of the first HARQ-ACK may be determined according to the bit number of the first HARQ-ACK, the first mapping relationship set, and the value in the MCS offset value bit field.
It should be understood that the N mapping relationship sets may be predefined or preconfigured by the system or network device. In addition, the MCS offset value bit field in the present application may be a Beta-offset byte in the prior art.
Alternatively, the MCS offset value bitfield may be a first MCS offset value bitfield among the D MCS offset value bitfields included in the DCI. D MCS offset value bit fields correspond to the M MCS tables.
With reference to the first aspect, in some implementations of the first aspect, the first uplink channel is an uplink data channel, and the transmission parameter of the first HARQ-ACK includes an MCS offset value of the first HARQ-ACK. In this case, the determining the transmission parameter of the first HARQ-ACK according to the first MCS table includes: the MCS offset value of the first HARQ-ACK is determined based on the pre-configured P MCS offset value sets according to the first MCS table.
Wherein P and M are integers greater than 1. The P MCS offset value sets correspond to the M MCS tables, the first MCS offset value set corresponds to the first MCS table, and the first MCS offset value set is one of the P MCS offset value sets. Each MCS offset value set includes a corresponding MCS offset value if the number of bits of the HARQ-ACK is different, and the MCS offset value of the first HARQ-ACK may be one MCS offset value of the first MCS offset value set. In addition, the P MCS offset value sets further include a second MCS offset value set, the second MCS offset value set corresponding to a second MCS table.
It should be understood that the network device may pre-configure the P MCS offset value sets through higher layer signaling, which may also be protocol-predetermined.
With reference to the first aspect, in some implementations of the first aspect, the first uplink channel is an uplink control channel, and the transmission parameter of the first HARQ-ACK includes a coding rate of the first HARQ-ACK. In this case, the determining the transmission parameter of the first HARQ-ACK according to the first MCS table includes: and determining the coding rate of the first HARQ-ACK corresponding to the first MCS table from S coding rates. Wherein the S coding rates correspond to M MCS tables including the first MCS table, M and S being integers greater than 1.
It should be understood that the network device may pre-configure the S coding rates through higher layer signaling. It will be appreciated that the S code rates may also be protocol predetermined.
With reference to the first aspect, in certain implementations of the first aspect, the first uplink channel is an uplink data channel, and the transmission parameter of the first HARQ-ACK includes a total number of DAIs of the first HARQ-ACK. In this case, the determining the transmission parameter of the first HARQ-ACK according to the first MCS table includes: and determining the total number of DAIs of the first HARQ-ACK according to a first DAI bit field in the DCI.
Wherein the first DAI bit field is one of Q DAI bit fields in the DCI, the first MCS table is one of M MCS tables, the Q DAI bit fields correspond to the M MCS tables, the first DAI bit field corresponds to the first MCS table, the downlink control information is used to schedule the downlink data transmission, and M and Q are integers greater than 1.
Specifically, the terminal device may determine the total number of DAIs of the first HARQ-ACK according to a value in a first DAI bit field in the DCI, the bit number of the first HARQ-ACK, and a mapping relationship between a value of the DAI bit field and the total number of DAIs.
Alternatively, each DAI bit field may include two subfields, one subfield indicating a total number of DAIs for transport block (TB-based) based HARQ-ACKs and one indicating a total number of DAIs for code block group (CBG-based) based HARQ-ACKs. The terminal device may determine the total number of DAIs for the first HARQ-ACK according to the first MCS table, whether the first HARQ-ACK is a TB-based HARQ-ACK or a CBG-based HARQ-ACK. It should be understood that, in this case, each subfield may be 2 bits, and one DAI bit field may be 4 bits, but this is not limited by the embodiment of the present application.
In a second aspect, a method for receiving uplink control information is provided, where the method may be performed by a network device or a chip applied to the network device. The method comprises the following steps: determining a first Modulation and Coding Scheme (MCS) table, wherein the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request (HARQ-ACK); determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise one or more of the total number of Downlink Allocation Indexes (DAIs) of the first HARQ-ACK, the MCS offset value of the first HARQ-ACK and the coding rate of the first HARQ-ACK; determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK; and receiving the first HARQ-ACK on a first uplink channel according to the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols.
It should be understood that the implementation manner of the second aspect may refer to the description of the corresponding implementation manner of the first aspect, and is not described herein again.
In a third aspect, a method for sending uplink control information is provided, where an execution main body of the method may be a terminal device, or may be a chip applied to the terminal device, and the following description takes the terminal device as the execution main body as an example. The method comprises the following steps: determining a first Channel Quality Indicator (CQI) table corresponding to first Channel State Information (CSI); determining transmission parameters of the first CSI according to the first CQI table, wherein the transmission parameters of the first CSI comprise one or two of a Modulation and Coding Scheme (MCS) offset value of the first CSI and a coding rate of the first CSI; determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI; and transmitting the first CSI on a first uplink channel.
In this embodiment of the application, the first CQI table may indicate a service type corresponding to the first CSI, and the terminal device may determine the transmission parameter of the first CSI according to the service type corresponding to the first CSI. Further, the terminal device may determine the number of resources occupied by the first CSI or the number of modulation-coded symbols according to the transmission parameter. The terminal device may then transmit the first CSI on the first uplink channel. Accordingly, the network device may determine, according to the transmission parameter, the number of resources occupied by the first CSI or the number of modulation-coded symbols, and then receive the first CSI on the first uplink channel.
Therefore, in the method for transmitting uplink control information according to the embodiment of the present application, the terminal device may determine the transmission parameter of the CSI according to the CQI table used when reporting the CSI, so as to be capable of adapting to the requirements of the service type corresponding to the CSI on the delay and/or reliability.
With reference to the third aspect, in certain implementations of the third aspect, the first uplink channel is an uplink data channel, the transmission parameter of the first CSI includes an MCS offset value of the first CSI, and the MCS offset value of the first CSI includes an MCS offset value of a first part of the first CSI and an MCS offset value of a second part of the first CSI. Wherein the determining the transmission parameter of the first CSI according to the first CQI table comprises: determining an MCS offset value for the first portion according to a first set of mapping relationships in a first set of sets of mapping relationships and values in a MCS offset value bitfield, and determining an MCS offset value for the second portion according to the first set of mapping relationships in a second set of sets of mapping relationships and values in the MCS offset value bitfield,
each mapping relation set group comprises V mapping relation sets, the first mapping relation set is one of the V mapping relation sets, the V mapping relation sets correspond to T CQI tables, the first CQI table is one of the T CQI tables, the first CQI table corresponds to the first mapping relation set, under the condition that each mapping relation set in the first mapping relation set group represents different bit numbers of a first part of CSI, the value of an MCS offset value bit field and the corresponding relation of the MCS offset value are obtained, under the condition that each mapping relation set in the second mapping relation set group represents different bit numbers of a second part of the CSI, the value of the MCS offset value bit field and the corresponding relation of the MCS offset value are obtained, and T and V are integers larger than 1.
Optionally, the MCS offset value bit field is a first MCS offset value bit field of F MCS offset value bit fields, F is an integer greater than 1, and F MCS offset value bit fields correspond to the T CQI tables.
With reference to the third aspect, in some implementation manners of the third aspect, the first uplink channel is an uplink control channel, and the transmission parameter of the first CSI includes a coding rate of the first CSI. Wherein the determining the transmission parameter of the first CSI according to the first CQI table comprises: according to the first CQI table, MCS offset values of the first CSI are determined based on two MCS offset value sets configured in advance.
Wherein each MCS offset value set may include W MCS offset value sets, the W MCS offset value sets corresponding to T CQI tables, the T CQI tables including a first CQI table, W and T being integers greater than 1. A first MCS offset value set in each MCS offset value set corresponds to the first CQI table, and each MCS offset value set includes MCS offset values corresponding to the different numbers of bits of the CSI. The MCS offset value of the CSI part1 may be one of the first MCS offset value set in the first MCS offset value set, and the MCS offset value of the CSI part2 may be one of the first MCS offset value set in the second MCS offset value set. In addition, the plurality of MCS offset value sets in each MCS offset value set further includes a second MCS offset value set, the second MCS offset value set corresponding to the second CQI table.
It should be understood that the two sets of MCS offset values may be preconfigured by the network device through higher layer signaling.
With reference to the third aspect, in some implementation manners of the third aspect, the first uplink channel is an uplink control channel, and the transmission parameter of the first CSI includes a coding rate of the first CSI. Wherein the determining the transmission parameter of the first CSI according to the first CQI table comprises: determining a coding rate of the first CSI corresponding to the first CQI table from Y coding rates corresponding to T CQI tables including the first CQI table, T and Y being integers greater than 1.
It should be appreciated that the network device may pre-configure the Y coding rates through higher layer signaling. It will be appreciated that the Y code rates may also be protocol predetermined.
In a fourth aspect, a method for receiving uplink control information is provided, where the method may be performed by a network device or a chip applied to the network device. The method comprises the following steps: determining a first Channel Quality Indication (CQI) table corresponding to the first Channel State Information (CSI); determining transmission parameters of the first CSI according to the first CQI table, wherein the transmission parameters of the first CSI comprise one or two of a Modulation and Coding Scheme (MCS) offset value of the first CSI and a coding rate of the first CSI; determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI; and receiving the first CSI on a first uplink channel according to the number of resources occupied by the first CSI or the number of modulation coding symbols.
It should be understood that the implementation manner of the fourth aspect may refer to the description of the corresponding implementation manner of the third aspect, and is not described herein again.
In a fifth aspect, a method for sending uplink control information is provided, where an execution main body of the method may be a terminal device, or may be a chip applied to the terminal device, and the following description takes the terminal device as the execution main body as an example. The method comprises the following steps: determining transmission parameters of the first CSI; determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI; the first CSI is transmitted on a first uplink channel.
The first CSI is aperiodic channel state information (a-CSI) triggered by DCI and reported on a Physical Uplink Control Channel (PUCCH). The transmission parameter of the first CSI includes one or both of an MCS offset value of the first CSI and a coding rate of the first CSI.
With reference to the fifth aspect, in certain implementations of the fifth aspect, the first uplink channel is an uplink data channel, and the transmission parameter of the first CSI includes an MCS offset value of the first CSI. Wherein the transmission parameters of the first CSI comprise: and determining the MCS offset value of the CSI part1 in the first CSI according to the values in the bit fields of the first mapping relation set and the MCS offset value in the 2 mapping relation sets included in the first mapping relation set group, and determining the MCS offset value of the CSI part2 in the first CSI according to the values in the bit fields of the first mapping relation set and the MCS offset value in the 2 mapping relation sets included in the second mapping relation set group.
Specifically, each of the first mapping relationship set and the second mapping relationship set includes 2 mapping relationship sets, and the first mapping relationship set corresponds to the first CSI and the second mapping relationship set corresponds to the second CSI in each of the mapping relationship set sets. Each mapping relationship set in the first mapping relationship set group indicates a correspondence relationship between a value of the MCS offset value bit field and the MCS offset value in the case of a different number of bits of CSI part1, and each mapping relationship set in the second mapping relationship set group indicates a correspondence relationship between a value of the MCS offset value bit field and the MCS offset value in the case of a different number of bits of CSI part 2. The terminal device may determine the MCS offset value of the CSI part1 in the first CSI according to the first mapping relationship set in the first mapping relationship set group, the bit number of the CSI part1 in the first CSI, and the value in the MCS offset value bit field, and may determine the MCS offset value of the CSI part2 in the first CSI according to the first mapping relationship set in the second mapping relationship set group, the bit number of the CSI part2 in the first CSI, and the value in the offset value bit field.
It should be understood that the 2 mapping relationship sets may be predefined or preconfigured by the system or network device.
Optionally, the MCS offset value bitfield is a first MCS offset value bitfield of the 2 MCS offset value bitfields. Wherein a first MCS offset value bitfield of the 2 MCS offset value bitfields corresponds to the first CSI and a second MCS offset value bitfield of the 2 MCS offset value bitfields corresponds to the second CSI.
With reference to the fifth aspect, in certain implementations of the fifth aspect, the first uplink channel is an uplink data channel, and the transmission parameter of the first CSI includes an MCS offset value of the first CSI. Wherein the transmission parameters of the first CSI comprise: the MCS offset value of the first CSI is determined from 2 MCS offset value sets configured in advance.
Wherein each MCS offset value set may include 2 MCS offset value groups, and the 2 MCS offset value groups correspond to the first CSI and the second CSI, respectively. The first MCS offset value set in each MCS offset value set corresponds to the first CSI and the second MCS offset value set in each MCS offset value set corresponds to the second CSI. Each MCS offset value group in the first MCS offset value set of the 2 MCS offset value sets includes a corresponding MCS offset value if the bit number of the CSI part1 is different, and each MCS offset value group in the second MCS offset value set of the 2 MCS offset value sets includes a corresponding MCS offset value if the bit number of the CSI part2 is different. The terminal device may determine the MCS offset value of the CSI part1 in the first CSI according to the bit number of the CSI part1 in the first CSI and the MCS offset value set corresponding to the first CSI in the first MCS offset value set, and determine the MCS offset value of the CSI part2 in the first CSI according to the bit number of the CSI part2 in the first CSI and the MCS offset value set corresponding to the first CSI in the second MCS offset value set.
It should be understood that the network device may pre-configure the 2 sets of MCS offset values through higher layer signaling.
With reference to the fifth aspect, in some implementations of the fifth aspect, the first uplink channel is an uplink control channel, and the transmission parameter of the first CSI includes a coding rate of the first CSI. Wherein the transmission parameters of the first CSI comprise: the first coding rate, i.e., the coding rate of the first CSI, is determined from the 2 pre-configured coding rates. Wherein the first coding rate corresponds to the first CSI, and a second coding rate of the 2 coding rates corresponds to the second CSI.
It should be appreciated that the network device may pre-configure the 2 coding rates through higher layer signaling. It will be appreciated that the 2 coding rates may also be protocol predetermined.
In a sixth aspect, a method for receiving uplink control information is provided, where the method may be performed by a network device or a chip applied to the network device. The method comprises the following steps: determining transmission parameters of the first CSI; determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI; and receiving the first CSI on the first uplink channel according to the number of resources occupied by the first CSI or the number of modulation coding symbols.
The first CSI is a-CSI triggered by DCI and reported on a short format Physical Uplink Control Channel (PUCCH). The transmission parameter of the first CSI includes one or both of an MCS offset value of the first CSI and a coding rate of the first CSI.
It should be understood that the implementation manner of the sixth aspect may refer to the description of the corresponding implementation manner of the fifth aspect, and is not described herein again.
In a seventh aspect, a communication device is provided, which includes means for performing the method of the first aspect or any one of the possible implementations of the first aspect, or includes means for performing the method of the third aspect or any one of the possible implementations of the third aspect, or includes means for performing the method of any one of the possible implementations of the fifth aspect or the fifth aspect. The communication device comprises units that can be implemented by software and/or hardware.
In an eighth aspect, a communication device is provided, which comprises means for performing the method of any one of the possible implementations of the second aspect or the second aspect, or which comprises means for performing the method of any one of the possible implementations of the fourth aspect or the fourth aspect, or which comprises means for performing the method of any one of the possible implementations of the sixth aspect or the sixth aspect. The communication device comprises units that can be implemented by software and/or hardware.
In a ninth aspect, there is provided a communication device comprising a processor and a memory, the memory being configured to store a computer program, the processor being configured to invoke and run the computer program from the memory, such that the apparatus performs the method of any one of the possible implementations of the first to sixth aspects or the first to sixth aspects.
Optionally, the number of the processors is one or more, and the number of the memories is one or more.
Alternatively, the memory may be integral to the processor or provided separately from the processor.
Optionally, the communication device further includes a transceiver or a transceiver circuit, configured to perform a function of transceiving information.
In a tenth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the method of any one of the possible implementations of the first to sixth aspects or the first to sixth aspects.
In an eleventh aspect, the present application provides a computer program product comprising a computer program. The computer program, when executed, implements a method of any one of the possible implementations of the first to sixth aspects or of the first to sixth aspects.
In a twelfth aspect, the present application provides a chip system, where the chip system includes an input/output interface and at least one processor, and the at least one processor is configured to call instructions in a memory to perform the operations of the method in the first to sixth aspects or any one of the possible implementation manners of the first to sixth aspects.
Optionally, the system-on-chip may further include at least one memory for storing instructions for execution by the processor and a bus.
Optionally, the input/output interface is implemented in an interface circuit.
Drawings
Fig. 1 is a schematic diagram of a communication system suitable for use in embodiments of the present application.
Fig. 2 is a schematic flowchart of a method for transmitting uplink control information according to the present application.
Fig. 3 is a schematic flow chart of another method for transmitting uplink control information provided by the present application.
Fig. 4 is a schematic flowchart of a method for transmitting uplink control information according to the present application.
Fig. 5 is a schematic block diagram of a communication device according to the present application.
Fig. 6 is a schematic block diagram of a communication device provided herein.
Fig. 7 is a schematic block diagram of a communication device provided herein.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
The technical solution of the embodiment of the present application may be applied to a New Radio (NR) in a fifth generation (5th generation, 5G) mobile communication system or a future mobile communication system.
Terminal equipment in embodiments of the present application may refer to user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment.
The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a base station (node B, NB), an evolved node B (eNB), a base station in NR of a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, and the specific technology and the specific device form adopted by the network device are not limited in the embodiment of the present application. In the present application, the expressions of the 5G system and the NR system may be interchanged, unless otherwise specified.
In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.
For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be briefly described with reference to fig. 1. Fig. 1 is a schematic diagram of a system 100 suitable for use in embodiments of the present application. As shown in fig. 1, the system 100 includes a network device 101, and the system 100 further includes a terminal device 102 and a terminal device 103 located within the coverage of the network device 101. Network device 101 may communicate with terminal device 102 and terminal device 103. It should be understood that only two terminal devices within the coverage of network device 101 are illustrated in fig. 1 as an example. Obviously, there may be more terminal devices within the coverage of the network device 101.
NR configures 3 Modulation and Coding Scheme (MCS) tables for downlink data transmission, where 2 are for enhanced mobile broadband (eMBB) services: the method comprises the steps of 1 256 Quadrature Amplitude Modulation (QAM) table (marked as MCS table #1) multiplexing the LTE and a 64QAM table (marked as MCS table #2) multiplexing the LTE; 1 is a new 64QAM table (denoted as MCS table #3) for Ultra Reliable and Low Latency Communication (URLLC). Different from the normal 64QAM table, the Spectrum Efficiency (SE) corresponding to the new 64QAM table is lower, which can be understood as that under the same MCS index (index), the spectrum efficiency corresponding to the element in the new 64QAM table is lower than the spectrum efficiency of the element in the normal 64QAM table, or the lower limit of the coding rate range covered by the new 64QAM table is lower than the lower limit of the coding rate covered by the normal 64QAM table, which can indicate lower-rate transmission, and is suitable for ensuring the high reliability of URLLC. That is to say, the MCS table may indirectly indicate the service type, and the terminal device may determine the service type corresponding to the downlink data transmission according to the MCS table corresponding to the downlink data transmission. For example, if the MCS table is MCS table #3, it may be determined that the corresponding service type of downlink data transmission is URLLC service; if the MCS table is one of the MCS table #1 and the MCS table #2, it may be determined that the corresponding service type of the downlink data transmission is the eMBB service.
In order to adapt to different service types, transmission parameters (such as total DAI number, MCS offset value, and the like) of HARQ-ACK for performing HARQ feedback on downlink data transmission of different service types may have different requirements. However, in the prior art, only one set of transmission parameters for transmitting HARQ-ACK is configured, such as the total number of DAIs, the MCS offset value, and the like, which is obviously not flexible enough to meet the requirements of delay and/or reliability of different service types.
In view of this, the present application provides a method for transmitting uplink control information, which may adapt to the requirements of delay and/or reliability of different service types by associating the MCS table with the transmission parameters of the HARQ-ACK, and setting the corresponding transmission parameters for the HARQ-ACK corresponding to the downlink data transmission using the specific MCS table.
It should be noted that, the present application does not limit the MCS table to be the above-described NR configured MCS table, nor the correspondence between the MCS table and the service type to be the above-described NR configured MCS table and the service type. It should be understood that the present application is also applicable to the case where the system configures other multiple MCS tables and the multiple tables correspond to multiple service types.
Fig. 2 shows a schematic flowchart 200 of a method for transmitting uplink control information according to an embodiment of the present application. The method 200 may be applied to the system 100 shown in fig. 1, but the embodiment of the present application is not limited thereto.
S202, the network device determines a first MCS table.
For example, the network device may determine the MCS table (i.e., the first MCS table) according to a traffic type corresponding to the first downlink data transmission. For example, when the traffic type corresponding to the first downlink data transmission is URLLC traffic, the first MCS table may be determined to be MCS table # 3. The first MCS table is one of M MCS tables, and M is a positive integer greater than 1. In addition, the M MCS tables further include a second MCS table, and the type of traffic implicitly indicated by the first MCS table and the second MCS table is different. The M MCS tables may be predefined for a protocol or system.
In this application, the first downlink data transmission may include dynamically scheduled PDCSH, unlicensed PDCSH, and SPSPDSCH.
Optionally, after determining the first MCS table, the network device may configure the first MCS table to the terminal device in a semi-static configuration manner, for example, the network device may configure the first MCS table by using a high-level parameter MCS-table. Alternatively, the network device may dynamically configure the first MCS table. For example, when the first MCS table is MCS table #3, the network device may scramble and schedule the DCI for the first downlink data transmission using a new RNTI (denoted as X-RNTI) to notify the terminal device that the MCS table corresponding to the first downlink data transmission is MCS table # 3.
It should also be understood that after the network device performs the first downlink data transmission, the terminal device may feed back to the network device whether the first downlink data transmission is correctly received through HARQ-ACK. In this application, the HARQ feedback corresponding to the first downlink data transmission is recorded as: a first HARQ-ACK.
S204, the terminal equipment determines a first MCS table.
As described above, the first MCS table is a MCS table corresponding to the first downlink data transmission corresponding to the first HARQ-ACK. It should be understood that HARQ-ACK in this application includes ACK or NACK. In this embodiment of the application, when the terminal device feeds back the first downlink data transmission, the MCS table corresponding to the first downlink data transmission may be determined first, and then the transmission parameter of the first HARQ-ACK is determined according to the first MCS table (as described in S206 below).
Corresponding to S202, in S204, the terminal device determines that the first MCS table may specifically be: if the high layer does not configure a new RNTI (marked as X-RNTI), determining that the first MCS table is a table configured by a high-layer parameter MCS-table; and if the X-RNTI is configured by the high layer, determining a first MCS table according to the RNTI for scrambling the first DCI, the format of the first DCI and the search space type of the PDCCH for transmitting the first DCI, wherein the first DCI is the DCI for scheduling the first downlink data transmission. For example, when the first DCI is not a fallback DCI or a search space in which a PDCCH transmitting the first DCI is located is not a common search space, and an RNTI for scrambling the first DCI is an X-RNTI, it may be determined that the first MCS table is MCS table #3, that is, an MCS table corresponding to a URLLC service; when the first DCI is not the fallback DCI or a search space in which a PDCCH transmitting the first DCI is located is not a common search space, and an RNTI scrambling the first DCI is not an X-RNTI, the first MCS is one of MCS table #1 and MCS table # 2; when the DCI is a fallback DCI and the search space of the DCI is a common search space, the first MCS table may be determined to be one of MCS table #1 and MCS table # 2. In the present application, fallback DCI refers to a special DCI format, for example, DCI format 0_0 or 1_0 in NR, and is characterized in that whether all bit fields exist in the DCI, and the position and width of each bit field are predefined, and high-layer parameter configuration is not required.
S206, the network equipment determines the transmission parameter of the first HARQ-ACK according to the first MCS table.
S208, the terminal equipment determines the transmission parameter of the first HARQ-ACK according to the first MCS table.
S210, the network equipment determines the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK.
S212, the terminal equipment determines the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK.
The network device may determine transmission parameters for the first HARQ-ACK based on the traffic type implicitly indicated by the first MCS table. That is, the MCS table has a correspondence relationship with the transmission parameters of HARQ-ACK. Accordingly, the terminal device may determine the transmission parameter of the first HARQ-ACK according to the corresponding relationship.
The transmission parameters for the first HARQ-ACK may include one or more of a total number of DAIs for the first HARQ-ACK, an MCS offset value for the first HARQ-ACK, and a coding rate for the first HARQ-ACK. The total number of DAIs of the first HARQ-ACK is used for determining a first HARQ-ACK codebook, and further the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols can be determined; the MCS offset value of the first HARQ-ACK is used for determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols; the coding rate of the first HARQ-ACK is used to determine the number of bits after HARQ-ACK coding, and further, the number of resources occupied by the first HARQ-ACK or the number of modulation coded symbols may be determined.
It should be understood that, in the present application, the unit of the number of resources occupied by the first HARQ-ACK determined according to the total DAI number of the first HARQ-ACK and/or the MCS offset value of the first HARQ-ACK may be resource element (resource element), and the unit of the number of resources occupied by the first HARQ-ACK determined according to the coding rate of the first HARQ-ACK may be Resource Block (RB).
It is understood that the above S206 and S210 may be combined as: the network equipment determines the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the first MCS table; s208 and S212 may also be combined as: and the terminal equipment determines the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the first MCS table.
S214, the terminal equipment sends the first HARQ-ACK on the first uplink channel.
It can be understood that the terminal device needs to perform channel coding, rate matching and modulation on the first HARQ-ACK before sending the first HARQ-ACK, modulate the first HARQ-ACK on the corresponding modulation code symbol, and then map the modulation code symbol to the corresponding RE for sending.
S216, the network device receives the first HARQ-ACK on the first uplink channel according to the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols.
Specifically, the network device demodulates, performs inverse rate matching and performs channel decoding on the first HARQ-ACK on the first uplink channel according to the determined number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols, and obtains original bit information of the first HARQ-ACK.
In this embodiment of the present application, the first HARQ-ACK is used to perform HARQ feedback on the first downlink data transmission, the MCS table used for the first downlink data transmission is the first MCS table, the first MCS table may implicitly indicate a service type corresponding to the first HARQ-ACK, and the terminal device may determine a transmission parameter corresponding to the first HARQ-ACK according to the service type corresponding to the first HARQ-ACK. Further, the terminal device may determine the number of resources occupied by the first HARQ-ACK or the number of modulation coded symbols according to the transmission parameter. The terminal device may then transmit a first HARQ-ACK on the first uplink channel. Accordingly, the network device may determine the number of resources occupied by the first HARQ-ACK or the number of modulation code symbols according to the transmission parameter, and then receive the first HARQ-ACK on the first uplink channel.
Therefore, in the method for transmitting uplink control information according to the embodiment of the present application, the terminal device may determine, according to the MCS table used for downlink data transmission, the transmission parameter of the HARQ-ACK for performing HARQ feedback on the downlink data transmission, so as to be capable of adapting to the requirement of the service type corresponding to the HARQ-ACK for delay and/or reliability.
Optionally, the first uplink channel may be a data channel or a control channel. When the first uplink channel is a data channel, if the first uplink channel also carries uplink data, in S212, the terminal device may determine a first HARQ-ACK codebook according to the total number of DAIs of the first HARQ-ACK, and then determine the bit number of the first HARQ-ACK according to the size of the first HARQ-ACK codebook. Further, the terminal device may determine the number of resources occupied by the first HARQ-ACK transmitting on the first uplink channel or the number of modulation coded symbols according to the number of bits of the first HARQ-ACK, the transport block size TBS of the first uplink channel, and the MCS offset value of the first HARQ-ACK. If the first uplink channel carries the a-CSI but does not carry uplink data, the terminal device may calculate the coding rate of the first HARQ-ACK according to the MCS offset value of the first HARQ-ACK and the coding rate indicated by the uplink Grant (UL Grant) scheduling the first uplink channel, and then determine the number of resources occupied by the first HARQ-ACK for transmission on the first uplink channel or the number of modulation coding symbols according to the number of bits of the first HARQ-ACK and the calculated coding rate of the first HARQ-ACK. It should be noted that, when the number of bits of the first HARQ-ACK is less than or equal to 2, the number of time-frequency resources reserved for the first HARQ-ACK needs to be calculated, and the calculation of the reserved time-frequency resources is determined according to the number of bits of the first HARQ-ACK being equal to 2.
In the case that the first uplink channel is the PUCCH, the terminal device may determine the number of resources occupied by the first HARQ-ACK or the number of modulation code symbols according to the coding rate of the first HARQ-ACK, which may specifically refer to the prior art and is not described herein again.
Hereinafter, a specific implementation of S208 is illustrated for two scenarios where the first uplink channel is an uplink data channel (e.g., a first PUSCH) and an uplink control channel (e.g., a first PUCCH). S206 is similar to S208 and therefore will not be described in detail below.
Scene one:
the first uplink channel is an uplink data channel, that is, the first uplink channel is a first PUSCH
In this scenario, the transmission parameters for the first HARQ-ACK may include a total number of DAIs for the first HARQ-ACK, or an MCS offset value for the first HARQ-ACK, or both the total number of DAIs for the first HARQ-ACK and the MCS offset value for the first HARQ-ACK.
(1) In the case where the transmission parameter of the first HARQ-ACK includes the MCS offset value of the first HARQ-ACK, the terminal apparatus may determine the MCS offset value of the first HARQ-ACK according to any one of the manners one to three.
In one mode
The terminal device may determine the MCS offset value for the first HARQ-ACK according to the first set of mapping relationships and the value in the MCS offset value bit field. More specifically, the terminal device may determine the MCS offset value for the first HARQ-ACK based on the first set of mapping relationships, the number of bits for the first HARQ-ACK, and a value in the MCS offset value bit field.
The MCS offset value bit field is one bit field in DCI scheduling first downlink data transmission, the first set of mapping relationships is one of N sets of mapping relationships, and N is a positive integer greater than 1. The N mapping relation sets correspond to the M MCS tables, the first mapping relation set corresponds to the first MCS table, and the mapping relation sets represent the corresponding relation between the value of the MCS offset value bit field and the MCS offset value under the condition of different HARQ-ACK bit numbers. In addition, the N sets of mapping relationships further include a second set of mapping relationships, the second set of mapping relationships corresponding to a second MCS table. For example, in the case where the first MCS table is the MCS table #3, the second MCS table may be the MCS table #1 or the MCS table # 2. Alternatively, in the case where the first MCS table is the MCS table #1 or the MCS table #2, the second MCS table may be the MCS table # 3.
For example, the system or the network device may pre-define or pre-configure two mapping relationship sets, i.e., mapping relationship set #1 and mapping relationship set #2, the mapping relationship set #1 corresponding to MCS table #3, and the mapping relationship set #2 corresponding to MCS table #1 and MCS table # 2. If the first MCS table is MCS table #3, it may be determined that the first set of mapping relationships is set # 1. The terminal device may determine the MCS offset value for the first HARQ-ACK according to the mapping relationship set #1 and the value in the MCS offset value bit field in combination with the number of bits for the first HARQ-ACK.
It is to be understood that for HARQ-ACKs of different number of bits, the MCS offset value may be different in case the values in the MCS offset value bit field are the same.
It should be noted that, in this embodiment, the terminal device may determine the first mapping relationship set according to the first MCS table, and then determine the MCS offset value of the first HARQ-ACK according to the value in the MCS offset value bit field and the first mapping relationship set. Alternatively, the terminal device may determine N candidate MCS offset values according to the value in the MCS offset value bit field and the N mapping relationship sets, and then determine the MCS offset value of the first HARQ-ACK from the N candidate MCS offset values according to the first MCS table. It can be understood that, in order to obtain the MCS offset value of the first HARQ-ACK, the related input parameters include the first MCS table, N sets of mapping relations, the number of bits of the HARQ-ACK, and the value of the MCS offset value bit field. During specific implementation, an intermediate variable can be determined according to one, two or three of the input parameters, and then an MCS offset value of the first HARQ-ACK is determined according to the intermediate variable and the remaining input parameters; or the MCS deviation value of the first HARQ-ACK can be directly obtained according to the four input parameters. The present application does not limit the steps and the sequence of how to obtain the MCS offset value of the first HARQ-ACK according to the four input parameters.
In order to make those skilled in the art better understand the present application, the first embodiment will be described by taking an example in which the mapping relationship represented by the mapping relationship set #1 is shown in table 1, and the mapping relationship represented by the mapping relationship set #2 is shown in table 2. A11, a12, a13, a14, a21, a22, a23, a24, a31, a32, a33 and a34 in table 1 are positive real numbers, and b11, b12, b13, b14, b21, b22, b23, b24, b31, b32, b33 and b34 in table 2 are positive real numbers.
Take the value in the MCS offset value bit field as "00" and the number of bits of the first HARQ-ACK as 4 as an example. If the MCS set of the first MCS table is the mapping set #1, the MCS offset value of the first HARQ-ACK may be determined to be a21 as shown in table 1; if the MCS set of the first MCS table is set #2, the MCS offset value of the first HARQ-ACK may be determined to be b21 as shown in table 2.
TABLE 1
Figure BDA0001761844450000121
TABLE 2
Figure BDA0001761844450000122
It should be understood that the present application does not limit the number of bits of the MCS offset value bit field and the corresponding relationship between the possible values of the MCS offset value bit field and the MCS offset value in different mapping relationship sets, and table 1 and table 2 are only exemplary illustrations and should not constitute any limitation to the present application.
Mode two
And the terminal equipment determines the MCS offset value of the first HARQ-ACK according to the first mapping relation set described in the first mode and the first MCS offset value bit field in the D MCS offset value bit fields.
Wherein the D MCS offset value bit fields are bit fields in the DCI scheduling the first downlink data transmission, and D is an integer greater than 1. The D MCS offset value bit fields correspond to the M MCS tables, the D MCS offset value bit fields include a first MCS offset value bit field, and the first MCS table corresponds to the first MCS offset value bit field. In addition, the D MCS offset value bit fields further include a second MCS offset value bit field, and the second MCS offset value bit field corresponds to a second MCS table.
It is to be understood that the first MCS offset value bit field in mode two may correspond to the MCS offset value bit field in mode one.
Mode III
The terminal device determines the MCS offset value of the first HARQ-ACK based on the P pre-configured MCS offset value groups according to the first MCS table. Wherein P is a positive integer greater than 1.
Wherein the P MCS offset value sets correspond to the M MCS tables, the first MCS offset value set corresponds to the first MCS table, and the first MCS offset value set is one of the P MCS offset value sets. Each MCS offset value set includes a corresponding MCS offset value if the number of bits of the HARQ-ACK is different, and the MCS offset value of the first HARQ-ACK may be one MCS offset value in the first MCS offset value set. In addition, the P MCS offset value sets further include a second MCS offset value set, the second MCS offset value set corresponding to the second MCS table.
For example, two MCS offset value groups can be configured, each MCS offset value group including MCS offset values for the case where the number of bits for HARQ-ACK is 1 ~ 2, 3 ~ 11 and greater than 11, the first MCS offset value group can correspond to MCS table #3, and the second MCS offset value group can correspond to MCS table #1 and MCS table # 2. If the first MCS table is MCS table #3, the terminal device may determine the MCS offset value of the first HARQ-ACK from the first MCS offset value set in accordance with the number of bits of the first HARQ-ACK.
It should be understood that the network device may pre-configure the P MCS offset value sets through higher layer signaling, which may also be protocol-predetermined. The higher layer signaling referred to herein may be Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (CE), or the like.
(2) In the case that the first transmission parameter includes the total number of DAIs for the first HARQ-ACK, the terminal device may determine the total number of DAIs for the first HARQ-ACK according to the first or second manner.
In a first mode
And the terminal equipment determines the total number of DAIs of the first HARQ-ACK according to the first DAI bit field in the DCI.
Wherein the DCI is configured to schedule the first downlink data transmission, the first DAI bit field is one of Q DAI bit fields in the DCI, Q is a positive integer greater than 1, the Q DAI bit fields correspond to the M MCS tables, and the first DAI bit field corresponds to the first MCS table. In addition, the Q DAI bit fields further include a second DAI bit field, and the second DAI bit field corresponds to a second MCS table.
The terminal device may determine the total DAI number of the first HARQ-ACK according to the value in the first DAI bit field and a mapping relationship between the value of the DAI bit field and the total DAI number. It should be understood that the mapping of the value of the DAI bit field to the total number of DAIs may be a mapping specified in the prior art. In addition, the number of bits per DAI bit field may be 2.
Further, each DAI bit field may include two subfields, one subfield indicating a total DAI number of transport block (TB-based) based HARQ-ACKs and one indicating a total DAI number of code block group (CBG-based) based HARQ-ACKs. The terminal device may determine the total number of DAIs for the first HARQ-ACK according to the first MCS table, whether the first HARQ-ACK is a TB-based HARQ-ACK or a CBG-based HARQ-ACK. It should be understood that, in this case, each subfield may be 2 bits, and one DAI bit field may be 4 bits, but this is not limited by the embodiment of the present application.
Mode two
The terminal device may determine, according to the first MCS table, a first DAI total corresponding to the first MCS table among the R DAI totals. The first DAI total is the DAI total of the first HARQ-ACK. Wherein R is a positive integer greater than 1.
Wherein the R total number of DAIs corresponds to the M MCS tables. In addition, the R total DAI numbers further include a second total DAI number, the second total DAI number corresponding to a second MCS table.
It should be understood that the network device may pre-configure the R total DAIs through higher layer signaling. It is understood that the total number of R DAIs may also be protocol predetermined.
Scene two:
the first uplink channel is an uplink control channel, that is, the first uplink channel is a first PUCCH
In this scenario, the first HARQ-ACK transmission parameter may include an encoding rate of the first HARQ-ACK.
Alternatively, the terminal device may determine a first coding rate corresponding to the first MCS table, that is, a coding rate of the first HARQ-ACK, from among the S coding rates, according to the first MCS table. Wherein S is a positive integer greater than 1.
Wherein the S coding rates correspond to the M MCS tables. In addition, the S coding rates further include a second coding rate, and the second coding rate corresponds to a second MCS table.
It should be understood that the network device may pre-configure the S coding rates through higher layer signaling. It will be appreciated that the S code rates may also be protocol predetermined.
It should be understood that the manner in which the terminal device determines the transmission parameters of the first HARQ-ACK according to the first MCS table described above is only an exemplary illustration, and should not constitute any limitation to the present application. In particular implementation, the network device may use other ways to associate the MCS table with the transmission parameters of the HARQ-ACK, and the terminal device may use a corresponding way to determine the transmission parameters of the HARQ-ACK corresponding to the specific MCS table.
In the above, the scheme of associating the transmission parameter of the HARQ-ACK with the MCS table is mainly described, alternatively, the transmission parameter of the HARQ-ACK may be associated with the RNTI of the scrambled DCI, and the DCI is used to schedule the downlink data transmission corresponding to the HARQ-ACK.
As described above, in the case that the X-RNTI is configured in the higher layer, the terminal device may determine the first MCS table according to the scrambling RNTI of the DCI scheduling the first downlink data transmission and the format and the search space of the DCI. The first MCS table may be determined to be MCS table #3 when the scrambling code RNTI is X-RNTI and the DCI is not a fallback DCI or is not in a common search space, and to be one of MCS table #1 and MCS table #2 otherwise. That is, when the X-RNTI is configured in the higher layer, the RNTI with the scrambled DCI is associated with the MCS table for downlink data transmission. Therefore, the RNTI of the scrambled DCI can be associated with the transmission parameters of the HARQ-ACK corresponding to the downlink data transmission scheduled by the DCI, and the corresponding transmission parameters of the HARQ-ACK can be configured according to the difference of the RNTIs of the scrambled DCI. When the terminal equipment transmits the HARQ-ACK, the RNTI corresponding to the HARQ-ACK can be determined firstly, and then the transmission parameters of the HARQ-ACK are determined according to the determined RNTI.
It is to be understood that the network device may associate the RNTI of the scrambled DCI with the transmission parameters of the HARQ-ACK corresponding to the downlink data transmission scheduled by the DCI in a similar manner as the above embodiments. Correspondingly, the terminal equipment can determine the transmission parameters of the HARQ-ACK corresponding to the downlink data transmission scheduled by the DCI according to the RNTI of the scrambled DCI by using a similar method. For example, N sets of mapping relations in the first manner under the scenario one above may be associated with the RNTI of the scrambled DCI, so that the MCS offset value of the HARQ-ACK corresponding to the downlink data transmission scheduled by the DCI may be determined according to the RNTI of the scrambled DCI. How to associate the transmission parameters of HARQ-ACK with the RNTI of the scrambled DCI can refer to the above description, and is not described herein again.
The NR downlink channel measurement mechanism is: the network device sends a channel state information reference signal (CSI-RS), and the terminal device measures the CSI-RS to obtain channel information and feeds back CSI including CQI. NR configures 3 CQI tables, 2 of which are 256QAM tables (denoted as CQI table #1) and 64QAM tables (denoted as CQI table #2) multiplexing LTE; 1 is a new 64QAM table (denoted CQI table #3) for very high reliability low latency communications URLLC. In addition, the target block error rate (BLER) for the CQI table #1 and the CQI table #2 is 10%, and the target BLER for the CQI table #3 is 0.001%. That is, the CQI table may indirectly indicate the traffic type, and the terminal device may determine the traffic type according to the CQI table used. For example, if the CQI table is CQI table #3, it can be determined that the service type is URLLC service; if the CQI table is one of CQI table #1 and CQI table #2, it may be determined that the service type is the eMBB service.
For different service types, transmission parameters (such as MCS offset value, coding rate, etc.) used in CSI feedback may have different requirements. However, in the prior art, only one set of transmission parameters for transmitting CSI is configured, which is obviously inflexible, for example, unable to adapt to the requirements of delay and/or reliability of different service types.
In view of this, the present application provides a method for transmitting uplink control information, in which a CQI table is associated with a transmission parameter of CSI, and a corresponding transmission parameter is set for CSI using a specific CQI table, so as to meet requirements of different service types, such as delay and/or reliability.
It should be noted that, the present application does not limit the CQI table to the above-described NR configured CQI table, and does not limit the correspondence between the CQI table and the service type to the above-described NR configured CQI table and the service type. It should be understood that the present application is also applicable to the situation where the system is configured with other CQI tables and the tables correspond to multiple service types.
Fig. 3 shows a schematic flowchart 300 of a method for transmitting uplink control information according to an embodiment of the present application. The method 300 may be applied to the system 100 shown in fig. 1, but the embodiment of the present application is not limited thereto.
S302, the network device determines a first CQI table.
For example, the network device may determine the first CQI table according to a traffic type corresponding to a traffic to be scheduled (e.g., the second downlink data transmission). For example, when the service type corresponding to the second downlink data transmission is URLLC service, the first CQI table may be determined to be CQI table # 3. The first CQI table is one of T CQI tables, and T is a positive integer greater than 1. In addition, the T CQI tables further include a second CQI table, and the traffic type implicitly indicated by the first CQI table is different from that implicitly indicated by the second CQI table. The T CQI tables may be predefined by a protocol or system.
In this application, the second downlink data transmission may include dynamically scheduled PDCSH, unlicensed PDCSH, and SPSPDSCH.
Optionally, after determining the first CQI table, the network device may configure the first CQI table to the terminal device in a semi-static configuration manner, for example, the network device may configure the first CQI table through a higher layer. Alternatively, the network device may dynamically configure the first CQI table. For example, the network device may pre-configure the T CQI tables, and when it wants the terminal device to report CQI according to the first CQI table, the first CQI table may be activated through DCI or other signaling.
Alternatively, the terminal device may feed back the CQI corresponding to the first CQI table through the first CSI.
S304, the terminal equipment determines a first CQI table corresponding to the first CSI.
In this embodiment of the application, when the terminal device feeds back the first CSI, the first CQI table may be determined first, and then the transmission parameter of the first CSI is determined according to the first CQI table (as described in S306 below). The implementation manner of S304 corresponds to the implementation manner of S302, and reference may be specifically made to the description of S302, which is not described herein again.
S306, the network equipment determines the transmission parameters of the first CSI according to the first CQI table.
S308, the terminal equipment determines the transmission parameters of the first CSI according to the first CQI table.
S310, the network equipment determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI.
S312, the terminal device determines, according to the transmission parameter of the first CSI, the number of resources occupied by the first CSI or the number of modulation-coding symbols.
The transmission parameter of the first CSI includes an MCS offset value of the first CSI, or includes a coding rate of the first CSI, or includes an MCS offset value of the first CSI and a coding rate of the first CSI.
It should be understood that the MCS offset value of the first CSI comprises the MCS offset value of the first part of the first CSI and the MCS offset value of the second part of the first CSI, i.e. the MCS offset value of CSI part1 in the first CSI and the MCS offset value of CSI part2 in the first CSI. The MCS offset value of the CSI part1 in the first CSI may be used to determine the number of resources or modulation code symbols occupied by the CSI part1 in the first CSI, and the MCS offset value of the CSI part2 in the first CSI may be used to determine the number of resources or modulation code symbols occupied by the CSI part2 in the first CSI. The coding rate of the first CSI is used to determine the number of bits after the first CSI is coded, and further, the number of resources occupied by the first CSI or the number of modulation coded symbols may be determined.
It should be understood that the unit of the number of resources occupied by the first CSI determined according to the MCS offset value of the first CSI in the present application may be an RE. The unit of the number of resources occupied by the first CSI determined according to the encoding rate of the first CSI may be a Resource Block (RB).
It is understood that the above S306 and S310 may be combined as: the network equipment determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the first CQI table; s308 and S312 may also be combined as: and the terminal equipment determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the first CQI table.
S314, the terminal equipment sends the first CSI on the first uplink channel.
It can be understood that, before sending the first CSI, the terminal device needs to perform channel coding, rate matching and modulation on the first CSI, modulate the first CSI on corresponding modulation and coding symbols, and then map the modulation and coding symbols onto corresponding REs for sending.
S316, the network equipment receives the first CSI on the first uplink channel according to the number of resources occupied by the first CSI or the number of modulation coding symbols.
Specifically, the network device demodulates, performs inverse rate matching and performs channel decoding on the first CSI on the first uplink channel according to the determined number of resources occupied by the first CSI or the number of modulation-coded symbols, and obtains original bit information of the first CSI.
In this embodiment of the application, the first CQI table may indicate a service type corresponding to the first CSI, and the terminal device may determine the transmission parameter of the first CSI according to the service type corresponding to the first CSI. Further, the terminal device may determine the number of resources occupied by the first CSI or the number of modulation-coded symbols according to the transmission parameter. The terminal device may then transmit the first CSI on the first uplink channel. Accordingly, the network device may determine, according to the transmission parameter, the number of resources occupied by the first CSI or the number of modulation-coded symbols, and then receive the first CSI on the first uplink channel.
Therefore, in the method for transmitting uplink control information according to the embodiment of the present application, the terminal device may determine the transmission parameter of the CSI according to the CQI table used when reporting the CSI, so as to be capable of adapting to the requirements of the service type corresponding to the CSI on the delay and/or reliability.
Optionally, the first uplink channel may be a data channel or a control channel. When the first uplink channel is a data channel, if uplink data is also carried on the first uplink channel, in S312, the terminal device may determine, according to the bit number of the CSI part1 in the first CSI, the transport block size TBS of the first uplink channel, and the MCS offset value of the CSI part1 in the first CSI, the number of resources occupied by CSI part1 in the first CSI for transmission on the uplink channel or the number of modulation coding symbols. And the terminal device may determine, according to the bit number of the CSI part2 in the first CSI, the transport block size TBS of the first uplink channel, and the MCS offset value of the CSI part2 in the first CSI, the number of resources occupied by transmission of the CSI part2 in the first CSI on the first uplink channel or the number of modulation coding symbols.
In the case that the first uplink channel is the PUCCH, the terminal device may determine, according to the coding rate of the first CSI, the number of resources occupied by the first CSI or the number of modulation code symbols, which may specifically refer to the prior art and is not described herein again.
Hereinafter, a specific implementation of S308 is illustrated for two scenarios, i.e., the first uplink channel is an uplink data channel (e.g., the first PUSCH) and an uplink control channel (e.g., the first PUCCH). S306 is similar to S308 and therefore will not be described in detail below.
Scene one:
the first uplink channel is a first PUSCH
In this scenario, the transmission parameters of the first CSI may include an MCS offset value of the first CSI. The terminal device may determine the MCS offset value of the first CSI according to any one of the manners one to three.
In a first mode
The terminal device determines the MCS offset value of the CSI part1 in the first CSI according to the values in the bit fields of the first mapping relationship set and the MCS offset value in the V mapping relationship sets included in the first mapping relationship set group, and determines the MCS offset value of the CSI part2 in the first CSI according to the values in the bit fields of the first mapping relationship set and the MCS offset value in the V mapping relationship sets included in the second mapping relationship set group.
Specifically, each of the first mapping relationship set group and the second mapping relationship set group includes V mapping relationship sets, V mapping relationship sets in each mapping relationship set group correspond to the T CQI tables, and a first mapping relationship set in the V mapping relationship sets corresponds to a first CQI table, V being an integer greater than 1. Each mapping relation set in the first mapping relation set represents the corresponding relation between the value of the MCS offset value bit field and the MCS offset value under the condition of the bit number of different CSI part1, and each mapping relation set in the second mapping relation set represents the corresponding relation between the value of the MCS offset value bit field and the MCS offset value under the condition of the bit number of different CSI part 2. The first mapping relation in the first set of mapping relations is used for determining the MCS offset value of the CSI part1 in the first CSI, and the first mapping relation in the second set of mapping relations is used for determining the MCS offset value of the CSI part2 in the first CSI. In addition, the V sets of mapping relationships in each set of mapping relationships further include a second set of mapping relationships, the second set of mapping relationships corresponding to a second CQI table.
For example, the system or the network device may pre-define or pre-configure two mapping relationship set groups, each mapping relationship set group includes two mapping relationship sets, i.e., mapping relationship set #1 and mapping relationship set #2, mapping relationship set #1 may correspond to CQI table #3, and mapping relationship set #2 may correspond to CQI table #1 and CQI table # 2. If the first CQI table is CQI table #3, it may be determined that the first set of mapping relationships is set # 1. And under the condition that each mapping relation set in the first mapping relation set group indicates that the bit number of the CSI part1 belongs to different intervals (such as 1-11 and >11), the values of the first bit field are corresponding MCS offset values when the values are 00,01,10 and 11 respectively. And under the condition that each mapping relation set in the second mapping relation set group indicates that the bit number of the CSI part2 belongs to different intervals (such as 1-11 and >11), the values of the first bit field are corresponding MCS offset values when the values are 00,01,10 and 11 respectively. In a case where it is determined that the mapping relationship set corresponding to the first CQI table is the mapping relationship set #1, the terminal device may determine the MCS offset value of the CSI part1 according to the values in the bit fields of the mapping relationship set #1 and the MCS offset value in the first mapping relationship set group and in combination with the bit number of the CSI part1, and determine the MAC offset value of the CSI part2 according to the values in the bit fields of the mapping relationship set #1 and the MCS offset value in the second mapping relationship set group and in combination with the bit number of the CSI part 2.
It is to be understood that for CSI of different number of bits, the MCS offset value may be different in case the values in the MCS offset value bit field are the same.
It can be understood that, in order to obtain the MCS offset value of the first CSI, the related input parameters include the first CQI table, two mapping relation set groups, the number of bits of CSI part1 in the first CSI, the number of bits of CSI part2 in the first CSI, and the value of the MCS offset value bit field. In specific implementation, an intermediate variable may be determined according to one or more of the input parameters, and then an MCS offset value of the first CSI may be determined according to the intermediate variable and the remaining input parameters; alternatively, the MCS offset value of the first CSI may be directly obtained from the five input parameters. The present application does not limit the steps and the sequence of how to obtain the MCS offset value of the first CSI according to the above five input parameters.
Mode two
And the terminal equipment determines the MCS offset value of the first CSI according to the first mapping relation set in each mapping relation set group and the first MCS offset value bit field in the F MCS offset value bit fields described in the first mode.
Wherein the F MCS offset value bit fields are bit fields in the DCI scheduling the first downlink data transmission. F MCS offset value bit fields correspond to the T CQI tables, the first CQI table corresponds to the first MCS offset value bit field, and F is an integer greater than 1. In addition, the F MCS offset value bit fields may further include a second MCS offset value bit field, and the second MCS offset value bit field corresponds to a second CQI table.
It is to be understood that the first MCS offset value bit field in mode two may correspond to the MCS offset value bit field in mode one.
Mode III
And the terminal equipment determines the MCS offset value of the first CSI based on two MCS offset value sets which are configured in advance according to the first CQI table.
Wherein each MCS offset value set can include W MCS offset value sets, the W MCS offset value sets correspond to the T CQI tables, and W is an integer greater than 1. The first MCS offset value set in each MCS offset value set corresponds to the first CQI table, and each MCS offset value set includes MCS offset values corresponding to the different numbers of bits of CSI. The MCS offset value of the CSI part1 may be one of the first MCS offset value set in the first MCS offset value set, and the MCS offset value of the CSI part2 may be one of the first MCS offset value set in the second MCS offset value set. In addition, the plurality of MCS offset value sets in each MCS offset value set further includes a second MCS offset value set, the second MCS offset value set corresponding to the second CQI table.
For example, two MCS offset value sets may be configured, each including two MCS offset value sets. Each MCS offset value group in each MCS offset value set indicates the MCS offset value for the case where the number of bits of CSI belongs to different intervals (e.g., 1-11 and >11), the first MCS offset value group in each MCS offset value set can be associated with CQI Table #3, and the second MCS offset value group can be associated with CQI Table #1 and CQI Table # 2. If the first CQI table is CQI table #3, the terminal device may determine the MCS offset value of CSI part1 by combining the bit number of CSI part1 and the first MCS offset value set in the first MCS offset value set, and may determine the MCS offset value of CSI part2 by combining the bit number of CSI part2 and the first MCS offset value set in the second MCS offset value set.
It should be understood that the network device may pre-configure the two MCS offset value sets through higher layer signaling.
Scene two:
the first uplink channel is an uplink control channel (i.e., a first PUCCH)
In this scenario, the transmission parameters of the first CSI may include a coding rate of the first CSI.
Alternatively, the terminal device may determine, according to the first CQI table, a first coding rate corresponding to the first CQI table, that is, a coding rate of the first CSI, from among the Y coding rates. Wherein Y is a positive integer greater than 1.
Wherein the Y coding rates correspond to the T CQI tables. In addition, the Y coding rates further include a second coding rate, and the second coding rate corresponds to a second CQI table.
It should be appreciated that the network device may pre-configure the Y coding rates through higher layer signaling. It will be appreciated that the Y code rates may also be protocol predetermined.
Fig. 4 shows a schematic flowchart 400 of a method for transmitting uplink control information according to an embodiment of the present application. The method 400 may be applied to the system 100 shown in fig. 1, but the embodiment of the present application is not limited thereto.
S402, the network equipment determines the transmission parameters of the first CSI.
S404, the terminal equipment determines the transmission parameters of the first CSI.
The first CSI is an a-CSI that is triggered by DCI and reported on a short-format PUCCH, and indicates a first service type, where the first service type may be a URLLC service, but the present application is not limited thereto. Further, the CQI table corresponding to the first CSI is CQI table # 3.
The transmission parameter of the first CSI includes one or both of an MCS offset value of the first CSI and a coding rate of the first CSI. It should be understood that the MCS offset value of the first CSI includes the MCS offset value of the CSI part1 in the first CSI and the MCS offset value of the CSI part2 in the first CSI.
It should be noted that, in the method 400, all CSI which do not satisfy the configuration of the first CSI may be referred to as second CSI. That is, CSI that do not satisfy the following configuration at the same time are all the second CSI: (1) triggering DCI; (2) reporting on a short format PUCCH; (3) and (3) A-CSI. And the second CSI and the first CSI indicate different service types. Further, the CSI that do not simultaneously satisfy the following configurations are all the second CSI: (1) triggering DCI; (2) reporting on a short format PUCCH; (3) A-CSI; (4) the CQI table corresponding to the CSI is CQI table # 3.
In this embodiment, the network device may configure corresponding transmission parameters for the first CSI and the second CSI, respectively.
S406, the network device determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameter of the first CSI.
S408, the terminal device determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI.
The transmission parameter of the first CSI includes an MCS offset value of the first CSI or includes a coding rate of the first CSI, or includes an MCS offset value of the first CSI and a coding rate of the first CSI. It should be understood that the MCS offset value of the first CSI comprises the MCS offset value of the first part of the first CSI and the MCS offset value of the second part of the first CSI, i.e. the MCS offset value of CSI part1 in the first CSI and the MCS offset value of CSI part2 in the first CSI. The MCS offset value of the CSI part1 in the first CSI may be used to determine the number of resources occupied by the CSI part1 or the number of modulation-coded symbols in the first CSI, and the MCS offset value of the CSI part2 in the first CSI may be used to determine the number of resources occupied by the CSI part2 in the first CSI or the number of modulation-coded symbols in the first CSI. The coding rate of the first CSI is used to determine the number of bits after the first CSI is coded, and further, the number of resources occupied by the first CSI or the number of modulation coded symbols may be determined.
It should be understood that the unit of the number of resources occupied by the first CSI determined according to the MCS offset value of the first CSI in the present application may be an RE. The unit of the number of resources occupied by the first CSI determined according to the coding rate of the first CSI may be an RB.
It is understood that the above S402 and S406 may be combined as: the network equipment determines the number of resources occupied by the first CSI or the number of modulation coding symbols; s404 and S408 may also be combined as: the terminal device determines the number of resources occupied by the first CSI or the number of modulation code symbols.
S410, the terminal equipment sends the first CSI on the first uplink channel.
It can be understood that, before sending the first CSI, the terminal device needs to perform channel coding, rate matching and modulation on the first CSI, modulate the first CSI on corresponding modulation and coding symbols, and then map the modulation and coding symbols onto corresponding REs for sending.
S412, the network device receives the first CSI according to the number of resources occupied by the first CSI or the number of modulation-coding symbols.
Specifically, the network device demodulates, performs inverse rate matching and performs channel decoding on the first CSI on the first uplink channel according to the determined number of resources occupied by the first CSI or the number of modulation-coded symbols, and obtains original bit information of the first CSI.
In the method for transmitting uplink control information according to the embodiment of the application, the first CSI and the second CSI correspond to a set of transmission parameters respectively, when the first CSI needs to be transmitted, the terminal device determines the transmission parameters of the first CSI, and determines the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI. The terminal device may then transmit the first CSI on the first uplink channel. Accordingly, the network device may determine, according to the transmission parameter, the number of resources occupied by the first CSI or the number of modulation-coded symbols, and then receive the first CSI on the first uplink channel. Therefore, according to the method of the embodiment of the application, the terminal device can flexibly feed back the CSI.
Optionally, the first uplink channel may be a data channel or a control channel. When the first uplink channel is a data channel, if uplink data is also carried on the first uplink channel, in S408, the terminal device may determine, according to the bit number of the CSI part1 in the first CSI, the transport block size TBS of the first uplink channel, and the MCS offset value of the CSI part1 in the first CSI, the number of resources occupied by the CSI part1 in the first CSI for transmission on the uplink channel or the number of modulation coded symbols. And the terminal device may determine, according to the number of bits of the CSI part2 in the first CSI, the transport block size TBS of the first uplink channel, and the MCS offset value of the CSI part2 in the first CSI, the number of resources occupied by transmission of the CSI part2 in the first CSI on the first uplink channel or the number of modulation-coded symbols.
In the case that the first uplink channel is the PUCCH, the terminal device may determine, according to the coding rate of the first CSI, the number of resources occupied by the first CSI or the number of modulation code symbols, which may specifically refer to the prior art and is not described herein again.
Hereinafter, a specific implementation of S404 is illustrated for two scenarios, i.e., the first uplink channel is an uplink data channel (e.g., the first PUSCH) and an uplink control channel (e.g., the first PUCCH). S402 is similar to S404 and therefore will not be described in detail below.
Scene one:
the first uplink channel is a first PUSCH
In this scenario, the transmission parameters of the first CSI may include an MCS offset value of the first CSI. The terminal device may determine the MCS offset value of the first CSI according to any one of the manners one to three.
In a first mode
The terminal device determines the MCS offset value of the CSI part1 in the first CSI according to the values in the bit fields of the first mapping relationship set and the MCS offset value in the 2 mapping relationship sets included in the first mapping relationship set group, and determines the MCS offset value of the CSI part2 in the first CSI according to the values in the bit fields of the first mapping relationship set and the MCS offset value in the 2 mapping relationship sets included in the second mapping relationship set group.
Specifically, each of the first mapping relationship set and the second mapping relationship set includes 2 mapping relationship sets, and the first mapping relationship set corresponds to the first CSI and the second mapping relationship set corresponds to the second CSI in each of the mapping relationship set sets. Each mapping relationship set in the first mapping relationship set group indicates a correspondence relationship between a value of the MCS offset value bit field and the MCS offset value in the case of a different number of bits of CSI part1, and each mapping relationship set in the second mapping relationship set group indicates a correspondence relationship between a value of the MCS offset value bit field and the MCS offset value in the case of a different number of bits of CSI part 2. The terminal device may determine the MCS offset value of the CSI part1 in the first CSI according to the first mapping relationship set in the first mapping relationship set group, the bit number of the CSI part1 in the first CSI, and the value in the MCS offset value bit field, and may determine the MCS offset value of the CSI part2 in the first CSI according to the first mapping relationship set in the second mapping relationship set group, the bit number of the CSI part2 in the first CSI, and the value in the offset value bit field.
It should be understood that the 2 mapping relationship sets may be predefined or preconfigured by the system or network device.
Mode two
And the terminal equipment determines the MCS offset value of the first CSI according to the first MCS offset value bit field in the first mapping relation set and the 2 MCS offset value bit fields in the two sets of mapping relation sets described in the first mode.
Wherein a first MCS offset value bitfield of the 2 MCS offset value bitfields corresponds to the first CSI and a second MCS offset value bitfield of the 2 MCS offset value bitfields corresponds to the second CSI.
Mode III
The terminal equipment determines the MCS offset value of the first CSI from the 2 pre-configured MCS offset value sets.
Wherein each MCS offset value set may include 2 MCS offset value groups, and the 2 MCS offset value groups correspond to the first CSI and the second CSI, respectively. The first MCS offset value set in each MCS offset value set corresponds to the first CSI and the second MCS offset value set in each MCS offset value set corresponds to the second CSI. Each MCS offset value group in the first MCS offset value set of the 2 MCS offset value sets includes a corresponding MCS offset value if the bit number of the CSI part1 is different, and each MCS offset value group in the second MCS offset value set of the 2 MCS offset value sets includes a corresponding MCS offset value if the bit number of the CSI part2 is different. The terminal device may determine the MCS offset value of the CSI part1 in the first CSI according to the bit number of the CSI part1 in the first CSI and the MCS offset value set corresponding to the first CSI in the first MCS offset value set, and determine the MCS offset value of the CSI part2 in the first CSI according to the bit number of the CSI part2 in the first CSI and the MCS offset value set corresponding to the first CSI in the second MCS offset value set.
It is to be appreciated that the network device may pre-configure the 2 sets of MCS offset values through higher layer signaling.
Scene two:
the first uplink channel is an uplink control channel (i.e., a first PUCCH)
In this scenario, the transmission parameters of the first CSI may include a coding rate of the first CSI.
Alternatively, the terminal device may determine the first coding rate, that is, the coding rate of the first CSI, from the 2 preconfigured coding rates. Wherein the first coding rate corresponds to the first CSI, and a second coding rate of the 2 coding rates corresponds to the second CSI.
It should be appreciated that the network device may pre-configure the 2 coding rates through higher layer signaling. It will be appreciated that the 2 coding rates may also be protocol predetermined.
The sequence numbers of the processes in the methods 200, 300 and 400 do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic.
Fig. 5 is a schematic block diagram of a communication apparatus 500 according to an embodiment of the present application, which may be a terminal device or a chip applied to the terminal device. As shown in fig. 5, the communication apparatus 500 includes: a processing unit 510 and a transmitting unit 520.
In one implementation, the processing unit 510 is configured to determine a first modulation and coding scheme, MCS, table, which is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request acknowledgement, HARQ-ACK; determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise one or more of the total number of Downlink Allocation Indexes (DAIs) of the first HARQ-ACK, the MCS offset value of the first HARQ-ACK and the coding rate of the first HARQ-ACK; and determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK. A sending unit 520 is configured to send the first HARQ-ACK on the first uplink channel.
It should be understood that, in this implementation, each unit in the communication apparatus 500 is respectively configured to execute each action or processing procedure executed by the terminal device in the method 200, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, a detailed description thereof is omitted in order to avoid redundancy.
In another implementation, processing unit 510 is configured to determine a first channel quality indicator, CQI, table corresponding to the first channel state information, CSI; determining transmission parameters of the first CSI according to the first CQI table, wherein the transmission parameters of the first CSI comprise one or two of a Modulation and Coding Scheme (MCS) offset value of the first CSI and a coding rate of the first CSI; and determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI. The sending unit 520 is configured to send the first CSI on a first uplink channel.
It should be understood that, in this implementation, each unit in the communication apparatus 500 is respectively configured to execute each action or processing procedure executed by the terminal device in the method 300, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, detailed description thereof is omitted in order to avoid redundancy.
In yet another implementation, the processing unit 510 is configured to determine transmission parameters of a first channel state information CSI, where the transmission parameters of the first CSI include one or both of a modulation and coding scheme, MCS, offset value of the first CSI and a coding rate of the first CSI; and determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI. The sending unit 520 is configured to send the first CSI on a first uplink channel.
It should be understood that, in this implementation, each unit in the communication apparatus 500 is respectively configured to execute each action or processing procedure executed by the terminal device in the method 400, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, detailed description thereof is omitted in order to avoid redundancy.
Fig. 6 is a schematic block diagram of a communication apparatus 600 according to an embodiment of the present application, where the communication apparatus may be a network device or a chip applied to the network device. As shown in fig. 6, the communication apparatus 600 includes: a processing unit 610 and a receiving unit 620.
In one implementation, the processing unit 610 is configured to determine a first modulation and coding scheme, MCS, table, which is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request, HARQ-ACK; determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise one or more of the total number of Downlink Allocation Indexes (DAIs) of the first HARQ-ACK, the MCS offset value of the first HARQ-ACK and the coding rate of the first HARQ-ACK; and determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK. The receiving unit 620 is configured to receive the first HARQ-ACK on the first uplink channel according to the number of resources occupied by the first HARQ-ACK or the number of modulation code symbols.
It should be understood that, in this implementation, each unit in the communication apparatus 600 is respectively configured to execute each action or process performed by the network device in the method 200, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, detailed description thereof is omitted in order to avoid redundancy.
In another implementation, the processing unit 610 is configured to determine a first channel quality indication CQI table, where the first CQI table corresponds to first channel state information CSI; determining transmission parameters of the first CSI according to the first CQI table, wherein the transmission parameters of the first CSI comprise one or two of a Modulation and Coding Scheme (MCS) offset value of the first CSI and a coding rate of the first CSI; determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI; the receiving unit 620 is configured to receive the first CSI on the first uplink channel according to the number of resources occupied by the first CSI or the number of modulation coded symbols.
It should be understood that, in this implementation, each unit in the communication apparatus 600 is respectively configured to execute each action or process performed by the network device in the method 300, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, detailed description thereof is omitted in order to avoid redundancy.
In yet another implementation, the processing unit 610 is configured to determine transmission parameters of a first channel state information CSI, where the transmission parameters of the first CSI include one or both of a modulation and coding scheme, MCS, offset value of the first CSI and a coding rate of the first CSI; and determining the number of resources occupied by the first CSI or the number of modulation coding symbols according to the transmission parameters of the first CSI. The receiving unit 620 is configured to send the first CSI on the first uplink channel according to the number of resources occupied by the first CSI or the number of modulation-coded symbols.
It should be understood that, in this implementation, each unit in the communication apparatus 600 is respectively configured to execute each action or process performed by the network device in the method 400, and therefore, the beneficial effects in the above method embodiments can also be achieved. Here, detailed description thereof is omitted in order to avoid redundancy.
Fig. 7 shows a schematic block diagram of a communication device 700 according to an embodiment of the present application. As shown in fig. 7, the communication device 700 includes a processor 720. Optionally, the communication device 700 further comprises a transceiver 710 and a memory 730. The transceiver 710, the processor 720 and the memory 730 communicate with each other via internal connection paths to transfer control and/or data signals. The transceiver 710 may be implemented by way of transceiver circuitry.
The communication device 700 may be used to implement the functionality of any of the implementations implemented by the communication device 500 described above. Specifically, when the processor 720 calls and runs the computer program from the memory, the processor 720 may be configured to perform the data processing function of the terminal device in the above methods, and control the transceiver 710 to complete the information transceiving function of the corresponding terminal device. It is to be understood that the processor 720 of the communication device 700 may correspond to the processing unit 510 in the communication device 500 and the transceiver 710 of the communication device 700 may correspond to the transmitting unit 520 in the communication device 500.
The communication device 700 may also be used to implement the functionality of any of the implementations implemented by the communication device 600 described above. Specifically, when the processor 720 calls and runs the computer program from the memory, the processor 720 may be configured to perform the data processing function of the network device in the above methods, and control the transceiver 710 to complete the information transceiving function of the corresponding network device. It is to be understood that the processor 720 of the communication device 700 may correspond to the processing unit 510 in the communication device 600 and the transceiver 710 of the communication device 700 may correspond to the receiving unit 620 in the communication device 600.
In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.
The embodiment of the application can be applied to or realized by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software in the decoding processor. The software may be in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
It is to be understood that when the embodiments of the present application are applied to a terminal device chip, the terminal device chip implements the functions of the processing unit 510 or the processor 720. The terminal device chip may also send the first HARQ-ACK or the first CSI to other modules (such as a radio frequency module or an antenna) in the terminal device, where the first HARQ-ACK or the first CSI is sent to the network device via the other modules of the terminal device.
When the embodiments of the present application are applied to a network device chip, the network device chip implements the functions of the processing unit 610 or the processor 720. The network device chip may also receive the first HARQ-ACK or the first CSI from other modules (such as a radio frequency module or an antenna) in the network device, where the first HARQ-ACK or the first CSI is sent by the terminal device to the network device.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In the application, the correspondence between a and B may be understood as that a and B are associated or that a and B have an association relationship.
It should be understood that the manner, the case, the category and the division of the embodiments in the present application are only for convenience of description and should not constitute a particular limitation, and features in various manners, categories, cases and embodiments can be combined without contradiction.
It should also be understood that the terms "first" and "second" in the examples of the application are used for distinguishing and should not be construed to limit the application in any way.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application.

Claims (12)

1. A method for transmitting uplink control information, comprising:
determining a first Modulation and Coding Scheme (MCS) table, wherein the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request acknowledgement (HARQ-ACK);
determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise the total number of Downlink Allocation Indexes (DAIs) of the first HARQ-ACK and/or the coding rate of the first HARQ-ACK;
determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK;
and transmitting the first HARQ-ACK on a first uplink channel.
2. A method for receiving uplink control information, comprising:
determining a first Modulation and Coding Scheme (MCS) table, wherein the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request (HARQ-ACK);
determining transmission parameters of the first HARQ-ACK according to the first MCS table, wherein the transmission parameters of the first HARQ-ACK comprise the total number of Downlink Allocation Indexes (DAIs) of the first HARQ-ACK and/or the coding rate of the first HARQ-ACK;
determining the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols according to the transmission parameters of the first HARQ-ACK;
and receiving the first HARQ-ACK on a first uplink channel according to the number of resources occupied by the first HARQ-ACK or the number of modulation coding symbols.
3. The method of claim 1 or 2, wherein the first uplink channel is an uplink data channel, and the transmission parameters for the first HARQ-ACK comprise a MCS offset value for the first HARQ-ACK;
wherein the determining the transmission parameter of the first HARQ-ACK according to the first MCS table comprises:
determining an MCS offset value for the first HARQ-ACK according to a first set of mapping relationships and values in an MCS offset value bit field,
the first mapping relation set is one of N mapping relation sets, the first MCS table is one of M MCS tables, the N mapping relation sets correspond to the M MCS tables, the first mapping relation set corresponds to the first MCS table, the mapping relation set includes a corresponding relation between a value of an MCS offset value bit field and an MCS offset value when the number of bits of HARQ-ACK is different, M and N are integers greater than 1, and the MCS offset value bit field is one bit field in downlink control information DCI for scheduling downlink data transmission.
4. The method of claim 1 or 2, wherein the first uplink channel is an uplink control channel, and the transmission parameters of the first HARQ-ACK comprise a coding rate of the first HARQ-ACK;
wherein the determining the transmission parameter of the first HARQ-ACK according to the first MCS table includes:
determining the coding rate of the first HARQ-ACK corresponding to the first MCS table from S coding rates, the S coding rates corresponding to M MCS tables including the first MCS table, M and S being integers greater than 1.
5. The method of claim 1 or 2, wherein the first uplink channel is an uplink data channel, and the transmission parameters for the first HARQ-ACK comprise a total number of DAIs for the first HARQ-ACK;
wherein the determining the transmission parameter of the first HARQ-ACK according to the first MCS table comprises:
determining the total number of DAIs of the first HARQ-ACK according to a first DAI bit field of downlink control information DCI, wherein the first DAI bit field is one of Q DAI bit fields in the DCI, the first MCS table is one of M MCS tables, the Q DAI bit fields correspond to the M MCS tables, the first DAI bit field corresponds to the first MCS table, the downlink control information is used for scheduling downlink data transmission, and M and Q are integers greater than 1.
6. A communications apparatus, comprising:
a processing unit, configured to determine a first modulation and coding scheme MCS table, where the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request acknowledgement HARQ-ACK;
the processing unit is further configured to determine transmission parameters of the first HARQ-ACK according to the first MCS table, where the transmission parameters of the first HARQ-ACK include a total number of Downlink Assignment Indices (DAIs) of the first HARQ-ACK and/or a coding rate of the first HARQ-ACK;
the processing unit is further configured to determine, according to the transmission parameter of the first HARQ-ACK, the number of resources occupied by the first HARQ-ACK or the number of modulation coded symbols;
a sending unit, configured to send the first HARQ-ACK on a first uplink channel.
7. A communications apparatus, comprising:
a processing unit, configured to determine a first modulation and coding scheme MCS table, where the first MCS table is an MCS table corresponding to downlink data transmission corresponding to a first hybrid automatic repeat request HARQ-ACK;
the processing unit is further configured to determine transmission parameters of the first HARQ-ACK according to the first MCS table, where the transmission parameters of the first HARQ-ACK include a total number of Downlink Assignment Indices (DAIs) of the first HARQ-ACK and/or a coding rate of the first HARQ-ACK;
the processing unit is further configured to determine, according to the transmission parameter of the first HARQ-ACK, the number of resources occupied by the first HARQ-ACK or the number of modulation coded symbols;
a receiving unit, configured to receive the first HARQ-ACK on a first uplink channel according to the number of resources occupied by the first HARQ-ACK or the number of modulation code symbols.
8. The communications apparatus of claim 6 or 7, wherein the first uplink channel is an uplink data channel, the transmission parameters for the first HARQ-ACK comprise a MCS offset value for the first HARQ-ACK;
wherein the processing unit is specifically configured to:
determining an MCS offset value of the first HARQ-ACK according to values in a first mapping relation set and an MCS offset value bit field, wherein the first mapping relation set is one of N mapping relation sets, the first MCS table is one of M MCS tables, the N mapping relation sets correspond to the M MCS tables, the first mapping relation set corresponds to the first MCS table, the mapping relation set comprises a corresponding relation between a value of the MCS offset value bit field and the MCS offset value when the number of bits of the HARQ-ACK is different, M and N are integers greater than 1, and the MCS offset value bit field is one bit field in downlink control information DCI for scheduling the downlink data transmission.
9. The communications apparatus of claim 6 or 7, wherein the first uplink channel is an uplink control channel and the transmission parameters for the first HARQ-ACK comprise a coding rate for the first HARQ-ACK;
wherein the processing unit is specifically configured to:
determining the coding rate of the first HARQ-ACK corresponding to the first MCS table from S coding rates, the S coding rates corresponding to M MCS tables including the first MCS table, M and S being integers greater than 1.
10. The communications apparatus of claim 6 or 7, wherein the first uplink channel is an uplink data channel, the transmission parameters for the first HARQ-ACK comprise a total number of DAIs for the first HARQ-ACK;
wherein the processing unit is specifically configured to:
determining the total number of DAIs of the first HARQ-ACK according to a first DAI bit field of downlink control information DCI, wherein the first DAI bit field is one of Q DAI bit fields in the DCI, the first MCS table is one of M MCS tables, the Q DAI bit fields correspond to the M MCS tables, the first DAI bit field corresponds to the first MCS table, the downlink control information is used for scheduling downlink data transmission, and M and Q are integers greater than 1.
11. A communication apparatus comprising a processor coupled to a memory, the memory storing a computer program, the processor being configured to execute the computer program stored in the memory to cause the apparatus to perform the method of any of claims 1 to 5.
12. A computer-readable storage medium storing a computer program which, when executed, implements the method of any one of claims 1 to 5.
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