CN111726868A - Data transmission method, information indication method, terminal and network equipment - Google Patents

Data transmission method, information indication method, terminal and network equipment Download PDF

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Publication number
CN111726868A
CN111726868A CN201910219318.1A CN201910219318A CN111726868A CN 111726868 A CN111726868 A CN 111726868A CN 201910219318 A CN201910219318 A CN 201910219318A CN 111726868 A CN111726868 A CN 111726868A
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China
Prior art keywords
resources
frequency
indication information
time
terminal
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Inventor
徐晓东
王飞
李岩
金婧
王启星
李男
刘光毅
丁海煜
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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Priority to CN201910219318.1A priority Critical patent/CN111726868A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Abstract

The disclosure provides a data transmission method, an information indication method, a terminal and a network device. The data transmission method comprises the following steps: receiving Downlink Control Information (DCI) or scheduling grant sent by network equipment, wherein the DCI or scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and Sounding Reference Signal (SRS) resource indication information; and according to the DCI or the scheduling authorization, on N target resources, N antenna ports of the terminal respectively transmit information on different target time-frequency resources. The scheme of the disclosure can improve the transmission capability of the terminal with multiple antenna ports by using the maximum power.

Description

Data transmission method, information indication method, terminal and network equipment
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, an information indication method, a terminal, and a network device.
Background
The NR Rel-15 uplink supports a Codebook-based data transmission method, and when a terminal has multiple transmit antennas, the terminal may be classified into full-coherent/partial-coherent/non-coherent terminals according to whether the multiple antennas of the terminal have coherent capability, as shown in the following table:
Figure BDA0002003075050000011
according to the R15 protocol, the terminal reports full-code/partial-code/non-code capability to the network, specifically, if the terminal is an incoherent terminal with two antenna ports, when the terminal performs uplink Codebook-based data transmission, the single stream can only select the first two codewords, and the dual stream can only use the first codeword.
In the prior art, for a non-coherent terminal with a maximum power of 26dBm, according to the protocol of Rel-15 at present, when a gbb uses DCI Format 0_1 to schedule a terminal to perform Codebook-based uplink single-stream transmission, only a Codebook (1, 0 or 0, 1) selected by an antenna can be used for uplink, and when the antenna selection Codebook is used, only 23dBm power can be transmitted at maximum due to the limitation of an air filtering control part, so that the power of 26dBm cannot play a role.
Disclosure of Invention
The disclosure provides a data transmission method, an information indication method, a terminal and a network device. The terminal with multiple antenna ports can improve the transmission capability of the terminal with the maximum power.
In order to solve the technical problem, the present disclosure provides the following solutions:
an information transmission method is applied to a terminal, and the method comprises the following steps:
receiving Downlink Control Information (DCI) or scheduling grant sent by network equipment, wherein the DCI or scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and Sounding Reference Signal (SRS) resource indication information;
and according to the DCI or the scheduling authorization, on N target resources, N antenna ports of the terminal respectively transmit information on different target time-frequency resources.
Wherein, according to the DCI or the scheduling grant, on N target resources, the N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources, including: obtaining N target resources and N antenna ports according to the DCI or the scheduling authorization; and on the N target resources, the N antenna ports of the terminal respectively transmit information in different target time-frequency resources.
Wherein obtaining the N target resources comprises: the terminal obtains time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and divides the time domain and frequency domain resources into the N target time frequency resources; or, the terminal obtains the time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, takes the time domain and frequency domain resources as reference resources, and obtains the N target time frequency resources according to a predefined rule or according to a resource association relationship determined by the indication information of the network device.
Wherein dividing the time domain and frequency domain resources into the N target time-frequency resources comprises:
and dividing the time domain and frequency domain resources into N target time frequency resources according to at least one of the frequency domain and the time domain.
The obtaining the N target time-frequency resources by using the time-domain and frequency-domain resources as reference resources and according to a predefined rule or a resource association relationship determined according to indication information of network equipment includes: and taking the time domain and frequency domain resources as reference resources, and obtaining N target time frequency resources according to at least one of the frequency domain and the time domain according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
Wherein obtaining N antenna ports comprises: and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
Wherein, obtaining N antenna ports of the terminal according to the SRS resource indication information comprises:
the N antenna ports correspond to the X SRS ports one to one, and X is equal to N; or an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N; alternatively, an I-th antenna port of the N antenna ports is the same antenna port as X SRS ports of SRS resources indicated by the SRS resource indication information, and is formed by an I-th precoding, where I is 1, 2, …, N.
And the N antenna ports correspond to the N target time frequency resources one to one.
Wherein, on the N target resources, the N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources, including:
according to a predetermined rule or indication information of the network device, an I-th antenna port of the N antenna ports performs information transmission on an I-th target time-frequency resource of the N target time-frequency resources, where I is 1, 2, …, N; or, according to the indication information of the network device, the I-th antenna port of the N antenna ports performs information transmission in the N + 1-I-th target time-frequency resource of the N target time-frequency resources, where I is 1, 2, …, N; or, the corresponding relations between the N antenna ports and the N target time-frequency resources are the same or different on different time-domain symbols.
The present disclosure also provides an information indication method, applied to a network device, the method including: sending downlink control information DCI or scheduling authorization to a terminal, wherein the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time frequency resources and N antenna ports of the terminal according to the indication information, wherein N is an integer greater than 1, and the N antenna ports of the terminal respectively perform information transmission on different target time frequency resources.
The present disclosure provides a terminal, including:
a transceiver, configured to receive a DCI or a scheduling grant sent by a network device, where the DCI or the scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information, and sounding reference signal SRS resource indication information;
and according to the DCI or the scheduling authorization, on N target resources, the N antenna ports of the terminal respectively transmit information on different target time frequency resources.
Wherein, the transceiver, according to the DCI or the scheduling grant, on N target resources, N antenna ports of the terminal are specifically configured to, when performing information transmission on different target time-frequency resources, respectively: obtaining N target resources and N antenna ports according to the DCI or the scheduling authorization; and on the N target resources, the N antenna ports of the terminal respectively transmit information in different target time-frequency resources.
Wherein, when the transceiver obtains N target resources, it is specifically configured to: acquiring time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and dividing the time domain and frequency domain resources into the N target time frequency resources; or, obtaining time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, taking the time domain and frequency domain resources as reference resources, and obtaining the N target time frequency resources according to a predefined rule or according to a resource association relationship determined by the indication information of the network device.
Wherein the dividing the time domain and frequency domain resources into the N target time-frequency resources comprises: and dividing the time domain and frequency domain resources into N target time frequency resources according to at least one of the frequency domain and the time domain.
The obtaining the N target time-frequency resources by using the time-domain and frequency-domain resources as reference resources and according to a predefined rule or a resource association relationship determined according to indication information of network equipment includes:
and taking the time domain and frequency domain resources as reference resources, and obtaining N target time frequency resources according to at least one of the frequency domain and the time domain according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
Wherein, when the transceiver obtains N antenna ports, it is specifically configured to: and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
Wherein, obtaining N antenna ports of the terminal according to the SRS resource indication information comprises: the N antenna ports correspond to the X SRS ports one to one, and X is equal to N; or an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N; alternatively, an I-th antenna port of the N antenna ports is the same antenna port as X SRS ports of SRS resources indicated by the SRS resource indication information, and is formed by an I-th precoding, where I is 1, 2, …, N.
And the N antenna ports correspond to the N target time frequency resources one to one.
Wherein, when the transceiver is on the N target resources and the N antenna ports of the terminal respectively transmit information on different target time-frequency resources, the transceiver is specifically configured to: determining that an ith antenna port corresponds to an ith target time-frequency resource, I being 1, 2, …, N, among the N antenna ports according to a predetermined rule or indication information of the network device; or, according to the indication information of the network device, determining that the I-th antenna port corresponds to the (N + 1) -I-th target time-frequency resource, where I is 1, 2, …, N; or, the corresponding relations between the N antenna ports and the N target time-frequency resources are the same or different on different time-domain symbols.
The present disclosure provides a network device, comprising: the terminal comprises a transceiver and a receiver, wherein the transceiver is used for sending downlink control information DCI or scheduling authorization to the terminal, the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time-frequency resources and N antenna ports of the terminal according to the indication information, N is an integer larger than 1, and the N antenna ports of the terminal respectively carry out information transmission on different target time-frequency resources.
The present disclosure provides a communication device including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
The present disclosure provides a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method as described above.
The above scheme of the present disclosure at least includes the following beneficial effects:
according to the scheme of the disclosure, downlink control information DCI or scheduling grant sent by network equipment is received, wherein the DCI or scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information; and according to the DCI or the scheduling authorization, on N target resources, N antenna ports of the terminal respectively transmit information on different target time-frequency resources. The terminal with multiple antenna ports can improve the transmission capability of the terminal with the maximum power.
Drawings
Fig. 1 is a schematic flowchart of a terminal-side data transmission method according to the present disclosure;
fig. 2 is a schematic architecture diagram of a terminal according to the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The present disclosure is directed to the prior art, if a terminal with multiple antenna ports is performing uplink Codebook-based data transmission, a single stream can only select the first two codewords. Because the uplink can only adopt a codebook (1, 0 or 0, 1) selected by an antenna, and because of the limitation of an air filtering control part when the antenna selection codebook is used, the maximum power can only be transmitted by 23dBm, so that the power of 26dBm of an antenna port can not play a role.
As shown in fig. 1, the present disclosure provides a data transmission method applied to a terminal, where the method includes:
step 11, a terminal receives downlink control information DCI or scheduling grant sent by a network device, wherein the DCI or scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information;
and step 12, according to the DCI or the scheduling authorization, on the N target resources, the N antenna ports of the terminal respectively transmit information on different target time-frequency resources. Here, the N antenna ports may be non-coherent or coherent antenna ports.
According to the method, by receiving downlink control information DCI or scheduling authorization sent by network equipment, N antenna ports of a terminal respectively transmit information in different target time-frequency resources on N target resources according to the DCI or scheduling authorization. Thereby improving the ability of the terminal with multiple antenna ports to transmit with maximum power (e.g., 26 dBm).
In a specific embodiment of the present disclosure, the step 12 may specifically include:
step 121, obtaining N target resources and N antenna ports according to the DCI or the scheduling grant;
and step 122, on the N target resources, the N antenna ports of the terminal respectively transmit information on different target time-frequency resources.
In step 121, obtaining N target resources may include:
step 1211, the terminal obtains time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and divides the time domain and the frequency domain resources into the N target time frequency resources, where the time domain and the frequency domain resources may be divided into the N target time frequency resources according to at least one of the frequency domain and the time domain; alternatively, the first and second electrodes may be,
in step 1212, the terminal obtains time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, uses the time domain and frequency domain resources as reference resources, and obtains the N target time frequency resources according to a predefined rule or a resource association relationship determined according to the indication information of the network device, where the N target time frequency resources can be obtained according to at least one of the frequency domain and the time domain.
Here, in step 1211, the following may be implemented: according to Time domain resource allocation and Frequency domain resource allocation in the DCI, defining all Time Frequency resources indicated by the Time domain resource allocation and Frequency domain resource allocation in the DCI as a Time Frequency resource set, dividing the Time Frequency resource set into N parts by a method of pre-definition or network indication, wherein the N parts are respectively a first Time Frequency resource, a second Time Frequency resource, … and an Nth Time Frequency resource, and each Time Frequency resource is one target Time Frequency resource.
Here, in step 1212, the following may be implemented: all time frequency resources indicated by time domain and frequency domain resource allocation in the DCI are defined as a time frequency resource set, a time frequency resource set II, … and a time frequency resource set K are determined by a method of predefined or network indication, the time frequency resource set II, the time frequency resource set … and the time frequency resource set K are mapped to a first time frequency resource, a second time frequency resource, … and an Nth time frequency resource by the method of predefined or network indication, K is greater than 1, and K and N can be equal or unequal.
In the step 121, obtaining N antenna ports may include: and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
Specifically, the N antenna ports correspond to the X SRS ports one to one, and X is equal to N; or an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N; alternatively, an I-th antenna port of the N antenna ports is the same antenna port as X SRS ports of SRS resources indicated by the SRS resource indication information, and is formed by an I-th precoding, where I is 1, 2, …, N.
Specifically, it is determined that an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, where I is 1, 2, …, N;
or, an I-th antenna port of the N antenna ports is determined to be the same antenna port as the X SRS ports of the SRS resource indicated by the SRS resource indication information, and I is 1, 2, …, N.
Here, when it is determined that the I-th antenna port of the N antenna ports is the first target antenna port, for example, the UE sets a first port of the SRS resource indicated by the SRS resource indication information in DCI format 0_1 (a format of DCI) as the first antenna port, sets a second port of the SRS resource indicated by the SRS resource indication information in DCI format 0_1 as the second antenna port, …, and sets an N-th port of the SRS resource indicated by the SRS resource indication information in DCI format 0_1 as the N-th antenna port;
here, when it is determined that the I-th antenna port of the N antenna ports is the second target antenna port, for example, a first antenna port is formed by first precoding using the same antenna port as the X SRS ports of the SRS resource indicated by the SRS resource indication information in DCI format 0_1, a second antenna port is formed by second precoding using the same antenna port as the X SRS ports of the SRS resource indicated by the SRS resource indication information in DCI format 0_1, and …, and an N-th antenna port is formed by N-th precoding using the same antenna port as the X SRS ports of the SRS resource indicated by the SRS resource indication information in DCI format 0_ 1.
In the implementation of step 12, the N antenna ports correspond to the N target time-frequency resources one to one, and the information transmission performed by the N antenna ports of the terminal on the N target time-frequency resources in different target time-frequency resources may specifically include: determining that an ith antenna port corresponds to an ith target time-frequency resource, I being 1, 2, …, N, among the N antenna ports according to a predetermined rule or indication information of the network device;
or, according to the indication information of the network device, determining that the I-th antenna port corresponds to the (N + 1) -I-th target time-frequency resource, where I is 1, 2, …, N;
or, the corresponding relations between the N antenna ports and the N target time-frequency resources are the same or different on different time-domain symbols.
Here, when it is determined that, according to a predetermined rule or indication information of the network device, an I-th antenna port of the N antenna ports corresponds to an I-th target time-frequency resource, for example, PUSCH (physical uplink shared channel) transmission is performed on the first time-frequency resource using the first antenna port, PUSCH transmission is performed on the second time-frequency resource using the second antenna port, … is performed, and PUSCH transmission is performed on the N-th time-frequency resource using the N-th antenna port.
Here, when it is determined that the I-th antenna port corresponds to the (N + 1) -I-th target time-frequency resource according to the indication information of the network device, for example, according to some indication information in the DCI, such as Precoding information and number of layers, when the Precoding information and the number of layers indicate "1 layer: TPMI ═ 0", the first antenna port performs PUSCH transmission on the first time-frequency resource, performs PUSCH transmission on the second time-frequency resource using the second antenna port, …, and performs PUSCH transmission on the N-th time-frequency resource using the N-th antenna port; when precoding information and layer number indicate "1 layer: TPMI ═ 1", the first antenna port performs PUSCH transmission on the nth time-frequency resource, performs PUSCH transmission on the N-1 th time-frequency resource using the second antenna port, …, and performs PUSCH transmission on the first time-frequency resource using the nth antenna port. And vice versa.
Here, the corresponding relations between the N antenna ports and the N target time frequency resources are the same or different on different time domain symbols, for example, the N antenna ports transmit on the N time frequency resources in a frequency hopping manner, for example, assuming that the PUSCH transmission resource indicated by the DCI includes X1 symbols in the time domain and X2 PRBs in the frequency domain (physical resource block, which is divided into two parts in the frequency domain, frequency domain 1 and frequency domain 2), the terminal transmits on the first symbol on frequency domain 1 using antenna port 1 and on frequency domain 2 using antenna port 2; on the 2 nd symbol, the transmission is on the frequency domain 1 using the antenna port 2, and the transmission is on the frequency domain 2 using the antenna port 1; on the 3 rd symbol, antenna port 1 transmits on frequency domain 1 and antenna port 2 is used for transmitting on frequency domain 2; on the 4 th symbol, the transmission is on frequency domain 1 using antenna port 2 and on frequency domain 2 using antenna port 1; and the indication of the base station in the DCI can be further combined to realize more flexible frequency hopping transmission.
The following describes a specific implementation of the above embodiment of the present disclosure with reference to a specific implementation example, and the process is as follows:
step 1, when the UE performs PUSCH transmission according to DCI, determining a first time-frequency resource, a second time-frequency resource, … and an Nth time-frequency resource according to a time domain and frequency domain resource allocation indication in the DCI, determining a first antenna port, a second antenna port, … and an Nth antenna port according to one or more SRS ports of the SRS resources indicated by SRS resource indication information in the DCI, and performing PUSCH transmission on N parts of time-frequency resources by using the N antenna ports, wherein N is greater than 1;
the method for determining the first time-frequency resource, the second time-frequency resource, … and the Nth time-frequency resource according to the time-frequency resource allocation indication and the frequency-frequency resource allocation indication in the DCI comprises the following steps:
1) all time-frequency resources indicated by time-domain and frequency-domain resource allocation in the DCI are defined as a time-frequency resource set, and the time-frequency resource set is divided into N parts by a method of pre-definition or network indication, and the N parts are respectively used as a first time-frequency resource, a second time-frequency resource, … and an Nth time-frequency resource.
Specifically, all time-frequency resources indicated by time-domain and frequency-domain resource allocation in the DCI may be defined as a time-frequency resource set, and the time-frequency resource set is divided into N parts in the frequency domain dimension by a method predefined or indicated by a network, for example, the time-frequency resource set includes M PRBs (physical resource blocks) in the frequency domain, the M PRBs are divided into two parts in the order from frequency to frequency and time domain from large to small, the first time-frequency resource includes a time-frequency resource part located before the frequency domain (M/2), and the second time-frequency resource includes a time-frequency resource part located after the frequency domain (M/2).
The method for determining the first time-frequency resource, the second time-frequency resource, … and the nth time-frequency resource according to the time-domain and frequency-domain resource allocation indication in the DCI may also include:
2) all time frequency resources indicated by time domain and frequency domain resource allocation in the DCI are defined as a time frequency resource set, a time frequency resource set II, … and a time frequency resource set K are determined by a method of predefined or network indication, the time frequency resource set II, the time frequency resource set … and the time frequency resource set K are mapped to a first time frequency resource, a second time frequency resource, … and an Nth time frequency resource by the method of predefined or network indication, K is greater than 1, and K and N can be equal or unequal.
Step 2, when the UE carries out PUSCH transmission according to the DCI, determining a first antenna port, a second antenna port, … and an Nth antenna port according to one or more SRS ports of SRS resources indicated by SRS resource indication information in the DCI;
when the UE performs PUSCH transmission according to the DCI, the method for determining the first antenna port, the second antenna port, the … and the Nth antenna port according to one or more SRS ports of the SRS resource indicated by the SRS resource indication information in the DCI comprises the following steps:
the UE takes the first port of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1 as the first antenna port, takes the second port of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1 as the second antenna port, …, and takes the nth port of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1 as the nth antenna port;
when the UE performs PUSCH transmission according to the DCI, the first antenna port, the second antenna port, the …, and the nth antenna port are determined according to one or more SRS ports of SRS resources indicated by SRS resource indication information in the DCI, and the specific method may also include:
forming a first antenna port by using the same antenna ports as the X SRS ports of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1, forming a second antenna port by using the same antenna ports as the X SRS ports of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1 by second precoding, …, and forming an N-th antenna port by using the same antenna ports as the X SRS ports of the SRS resource indicated by the SRS resource indication information in the DCI format 0_1 by N-th precoding;
the precoding may be one of the following tables:
Figure BDA0002003075050000111
in the table, the data is stored in the memory,
Figure BDA0002003075050000112
etc., is the value of W, i.e., the codebook.
Step 3, the PUSCH transmission is carried out on the N parts of time frequency resources by using the N antenna ports;
the method for PUSCH transmission on the N parts of time frequency resources by using the N antenna ports comprises the following steps:
performing PUSCH transmission on the first time-frequency resource using the first antenna port, PUSCH transmission on the second time-frequency resource using the second antenna port, …, PUSCH transmission on the Nth time-frequency resource using the Nth antenna port;
the method for PUSCH transmission on the N parts of time-frequency resources using the N antenna ports may also include:
according to certain indication information in the DCI, such as precoding information and the number of layers, when the precoding information and the number of layers indicate "1 layer: TPMI ═ 0", the first antenna port performs PUSCH transmission on the first time-frequency resource, uses the second antenna port to perform PUSCH transmission on the second time-frequency resource, …, and uses the nth antenna port to perform PUSCH transmission on the nth time-frequency resource; when precoding information and layer number indicate "1 layer: TPMI ═ 1", the first antenna port performs PUSCH transmission on the nth time-frequency resource, performs PUSCH transmission on the N-1 th time-frequency resource using the second antenna port, …, and performs PUSCH transmission on the first time-frequency resource using the nth antenna port. And vice versa.
The method for PUSCH transmission on the N parts of time-frequency resources using the N antenna ports may also include:
the N antenna ports transmit on the N time frequency resources in a frequency hopping manner, for example, assuming that the PUSCH transmission resource indicated by the DCI includes X1 symbols in the time domain and X2 PRBs in the frequency domain (divided into two parts in the frequency domain, frequency domain 1 and frequency domain 2), the terminal transmits on the first symbol in frequency domain 1 using antenna port 1 and in frequency domain 2 using antenna port 2; on the 2 nd symbol, the transmission is on the frequency domain 1 using the antenna port 2, and the transmission is on the frequency domain 2 using the antenna port 1; on the 3 rd symbol, antenna port 1 transmits on frequency domain 1 and antenna port 2 is used for transmitting on frequency domain 2; on the 4 th symbol, the transmission is on frequency domain 1 using antenna port 2 and on frequency domain 2 using antenna port 1; and the indication of the base station in the DCI can be further combined to realize more flexible frequency hopping transmission.
When the terminal is a terminal with two incoherent antenna ports, the terminal transmits PUSCH by using the first antenna port on a part of frequency domain resources (the maximum transmission capacity is 23dBm), and transmits PUSCH by using the second antenna port on other frequency domain resources (the maximum transmission capacity is 23dBm), so that the output power of 26dBm can be maximally realized, and the limitation of incoherent capacity is avoided.
Determining that the two parts of frequency domain resources have different methods according to the DCI Format0-1, wherein one method is to divide the time frequency resources indicated by the DCI Format0-1 into two parts on the frequency domain; and the other method is to take the time-frequency resources indicated by the DCI Format0-1 as the first part of resources and determine the second part of resources through a predefined rule.
The first antenna port and the second antenna port of the terminal may respectively correspond to two physical antennas of the terminal, or correspond to antenna ports that are the same as two ports of the 2-port SRS resource indicated by the SRS resource indication information in the DCI Format0-1, or correspond to two antenna ports formed after the SRS resource of two ports indicated by the SRS resource indication information in the DCI Format0-1 is converted in some way.
In addition, the base station and the UE need to know which port transmits data on which part of the time frequency resources, and one method is to determine by predefined rules, for example, a first antenna port transmits data on a first part of the time frequency resources, a second antenna port transmits data on a second part of the time frequency resources, or a second antenna port transmits data on the first part of the time frequency resources, and the first antenna port transmits data on the second part of the time frequency resources. Another method is to indicate which of the above manners to transmit through some indication information in the DCI, for example, the indication is performed through precoding information and a number of layers, when the precoding information and the number of layers indicate 1layer: TPMI ═ 0, a first antenna port is used to transmit data on a first part of time-frequency resources, a second antenna port is used to transmit data on a second part of time-frequency resources, when the precoding information and the number of layers indicate 1layer: TPMI ═ 1, the second antenna port is used to transmit data on the first part of time-frequency resources, the first antenna port is used to transmit data on the second part of time-frequency resources, and the indication may be exchanged.
For UE with reporting capability of 'nonCoherent' transmission, when carrying out codebook-based PUSCH transmission according to DCIFormat 0_1, if the UE configures one SRS resource set, the usage is set as 'codebook', and a higher-layer parameter nrofSRS-Ports in the SRS resource set indicates that two SRS antenna Ports are configured, the UE determines a first time-frequency resource and a second time-frequency resource according to a time-domain and frequency-domain resource allocation indication in DCI, determines a first antenna port and a second antenna port by using the same antenna port as the SRS port, and carries out PUSCH transmission on the first time-frequency resource and the second time-frequency resource by using the first antenna port and the second antenna port.
In the above embodiments of the present disclosure, independent time-frequency resources are configured for different antenna ports, respectively, so that the capability of performing single-stream transmission by using 26dBm power for each antenna port of a terminal (one antenna port has a function of 23dBm) with at least two antenna ports is improved.
The present disclosure also provides an information indication method, applied to a network device, the method including: sending downlink control information DCI or scheduling authorization to a terminal, wherein the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time frequency resources and N antenna ports of the terminal according to the indication information, wherein N is an integer greater than 1, and the N antenna ports of the terminal respectively perform information transmission on different target time frequency resources.
It should be noted that the network device may be a network device such as a base station, and the method is a method corresponding to the terminal-side method, and all embodiments related to the network device in the terminal-side method are applicable to this embodiment, and the same technical effects can be achieved.
As shown in fig. 2, the present disclosure also provides a terminal 20, including:
a transceiver 21, configured to receive a DCI or a scheduling grant sent by a network device, where the DCI or the scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information, and sounding reference signal SRS resource indication information; and according to the DCI or the scheduling authorization, on N target resources, the N antenna ports of the terminal respectively transmit information on different target time frequency resources.
The transceiver 21, according to the DCI or the scheduling grant, specifically, when the N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources on the N target resources, is configured to: obtaining N target resources and N antenna ports according to the DCI or the scheduling authorization; and on the N target resources, the N antenna ports of the terminal respectively transmit information in different target time-frequency resources.
When the transceiver 21 obtains N target resources, it is specifically configured to: acquiring time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and dividing the time domain and frequency domain resources into the N target time frequency resources; or, obtaining time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, taking the time domain and frequency domain resources as reference resources, and obtaining the N target time frequency resources according to a predefined rule or according to a resource association relationship determined by the indication information of the network device.
Wherein the dividing the time domain and frequency domain resources into the N target time-frequency resources comprises: and dividing the time domain and frequency domain resources into N target time frequency resources according to at least one of the frequency domain and the time domain.
The obtaining the N target time-frequency resources by using the time-domain and frequency-domain resources as reference resources and according to a predefined rule or a resource association relationship determined according to indication information of network equipment includes: and taking the time domain and frequency domain resources as reference resources, and obtaining N target time frequency resources according to at least one of the frequency domain and the time domain according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
Wherein, when the transceiver obtains N antenna ports, it is specifically configured to: and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
Wherein, obtaining N antenna ports of the terminal according to the SRS resource indication information comprises: the N antenna ports correspond to the X SRS ports one to one, and X is equal to N; or an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N; alternatively, an I-th antenna port of the N antenna ports is the same antenna port as X SRS ports of SRS resources indicated by the SRS resource indication information, and is formed by an I-th precoding, where I is 1, 2, …, N.
And the N antenna ports correspond to the N target time frequency resources one to one.
Wherein, when the transceiver is on the N target resources and the N antenna ports of the terminal respectively transmit information on different target time-frequency resources, the transceiver is specifically configured to: determining that an ith antenna port corresponds to an ith target time-frequency resource, I being 1, 2, …, N, among the N antenna ports according to a predetermined rule or indication information of the network device; or, according to the indication information of the network device, determining that the I-th antenna port corresponds to the (N + 1) -I-th target time-frequency resource, where I is 1, 2, …, N; or, the corresponding relations between the N antenna ports and the N target time-frequency resources are the same or different on different time-domain symbols.
It should be noted that the terminal is a terminal corresponding to the method on the terminal side shown in fig. 1, and all the implementations in the above method embodiments are applicable to the embodiments, and the same technical effects can be achieved. The terminal may further include: a memory 23; the transceiver 21 and the processor 22, and the transceiver 21 and the memory 23 may be connected through a bus interface, and the functions of the transceiver 21 may be implemented by the processor 22, and the functions of the processor 22 may also be implemented by the transceiver 21.
The present disclosure also provides a network device, comprising:
the terminal comprises a transceiver and a receiver, wherein the transceiver is used for sending downlink control information DCI or scheduling authorization to the terminal, the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time-frequency resources and N antenna ports of the terminal according to the indication information, N is an integer larger than 1, and the N antenna ports of the terminal respectively carry out information transmission on different target time-frequency resources.
It should be noted that the network device is a network device corresponding to the method on the network device side, and all implementation manners in the method embodiments are applicable to the embodiments, and the same technical effect can be achieved. The network device may further include: a processor, a memory; the transceiver and the processor, and the transceiver and the memory can be connected through a bus interface, the functions of the transceiver can be realized by the processor, and the functions of the processor can also be realized by the transceiver.
The present disclosure also provides a communication device comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method in the above embodiments. When the communication equipment is a terminal, the method of the terminal side is executed; when the communication device is a network device, the method of the network device side is executed.
The present disclosure also provides a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method of the terminal side or the network device side as above.
According to the method and the device, independent time-frequency resources are configured for different antenna ports respectively, so that the capacity that each antenna port of a terminal (the function of one antenna port is 23dBm) with at least two antenna ports uses power of 26dBm to perform single-stream transmission is improved.
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 disclosure.
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 embodiments provided in the present disclosure, it should be understood that the disclosed 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 logical division, and other divisions may be realized in practice, for example, a plurality of 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 place, or may be distributed on a plurality of 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 disclosure 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 disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several 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 disclosure. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Further, it is noted that in the apparatus and method of the present disclosure, it is apparent that each component or each step may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered equivalents of the present disclosure. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present disclosure may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.
Thus, the objects of the present disclosure may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. Thus, the object of the present disclosure can also be achieved merely by providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is also noted that in the apparatus and methods of the present disclosure, it is apparent that individual components or steps may be disassembled and/or re-assembled. These decompositions and/or recombinations are to be considered equivalents of the present disclosure. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present disclosure, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the disclosure, and it is intended that such changes and modifications be considered as within the scope of the disclosure.

Claims (22)

1. An information transmission method is applied to a terminal, and the method comprises the following steps:
the terminal receives Downlink Control Information (DCI) or scheduling grant sent by network equipment, wherein the DCI or scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and Sounding Reference Signal (SRS) resource indication information;
and according to the DCI or the scheduling authorization, on N target resources, N antenna ports of the terminal respectively transmit information on different target time-frequency resources.
2. The information transmission method according to claim 1, wherein, according to the DCI or the scheduling grant, on N target resources, the N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources, including:
obtaining N target resources and N antenna ports according to the DCI or the scheduling authorization;
and on the N target resources, the N antenna ports of the terminal respectively transmit information in different target time-frequency resources.
3. The information transmission method of claim 2, wherein obtaining N target resources comprises:
the terminal obtains time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and divides the time domain and frequency domain resources into the N target time frequency resources;
alternatively, the first and second electrodes may be,
and the terminal acquires time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, takes the time domain and frequency domain resources as reference resources, and acquires the N target time frequency resources according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
4. The information transmission method of claim 3, wherein dividing the time and frequency domain resources into the N target time-frequency resources comprises:
and dividing the time domain and frequency domain resources into N target time frequency resources according to at least one of the frequency domain and the time domain.
5. The information transmission method according to claim 3, wherein the obtaining the N target time-frequency resources by using the time-domain and frequency-domain resources as reference resources and according to a predefined rule or a resource association relationship determined according to indication information of a network device comprises:
and taking the time domain and frequency domain resources as reference resources, and obtaining N target time frequency resources according to at least one of the frequency domain and the time domain according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
6. The information transmission method of claim 2, wherein obtaining N antenna ports comprises:
and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
7. The information transmission method according to claim 6, wherein obtaining N antenna ports of a terminal according to the SRS resource indication information includes:
the N antenna ports correspond to the X SRS ports one to one, and X is equal to N;
alternatively, the first and second electrodes may be,
an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N;
alternatively, the first and second electrodes may be,
an I-th antenna port of the N antenna ports is an antenna port that is the same as X SRS ports of the SRS resource indicated by the SRS resource indication information and is formed by I-th precoding, where I is 1, 2, …, N.
8. The information transmission method according to claim 1, wherein the N antenna ports correspond to the N target time-frequency resources one-to-one.
9. The information transmission method according to claim 8, wherein, on the N target resources, the N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources, including:
according to a predetermined rule or indication information of the network device, an I-th antenna port of the N antenna ports performs information transmission on an I-th target time-frequency resource of the N target time-frequency resources, where I is 1, 2, …, N;
alternatively, the first and second electrodes may be,
according to the indication information of the network device, the I-th antenna port of the N antenna ports performs information transmission in the N + 1-I-th target time-frequency resource of the N target time-frequency resources, where I is 1, 2, …, N;
alternatively, the first and second electrodes may be,
the corresponding relations between the N antenna ports and the N target time frequency resources are the same or different on different time domain symbols.
10. An information indication method is applied to a network device, and the method comprises the following steps:
sending downlink control information DCI or scheduling authorization to a terminal, wherein the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time frequency resources and N antenna ports of the terminal according to the indication information, wherein N is an integer greater than 1, and the N antenna ports of the terminal respectively perform information transmission on different target time frequency resources.
11. A terminal, comprising:
a transceiver, configured to receive a DCI or a scheduling grant sent by a network device, where the DCI or the scheduling grant carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information, and sounding reference signal SRS resource indication information; and according to the DCI or the scheduling authorization, on N target resources, the N antenna ports of the terminal respectively transmit information on different target time frequency resources.
12. The terminal of claim 11, wherein, according to the DCI or the scheduling grant, the transceiver is specifically configured to, on N target resources, when N antenna ports of the terminal respectively perform information transmission on different target time-frequency resources: obtaining N target resources and N antenna ports according to the DCI or the scheduling authorization; and on the N target resources, the N antenna ports of the terminal respectively transmit information in different target time-frequency resources.
13. The terminal of claim 12, wherein the transceiver, when obtaining the N target resources, is specifically configured to:
acquiring time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, and dividing the time domain and frequency domain resources into the N target time frequency resources;
alternatively, the first and second electrodes may be,
and obtaining time domain and frequency domain resources according to the time domain resource allocation indication information and the frequency domain resource allocation indication information, taking the time domain and frequency domain resources as reference resources, and obtaining the N target time frequency resources according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
14. The terminal of claim 13, wherein said partitioning the time and frequency domain resources into the N target time-frequency resources comprises:
and dividing the time domain and frequency domain resources into N target time frequency resources according to at least one of the frequency domain and the time domain.
15. The terminal of claim 13, wherein taking the time domain and frequency domain resources as reference resources and obtaining the N target time-frequency resources according to a predefined rule or according to a resource association relationship determined by indication information of a network device comprises:
and taking the time domain and frequency domain resources as reference resources, and obtaining N target time frequency resources according to at least one of the frequency domain and the time domain according to a predefined rule or a resource association relation determined according to the indication information of the network equipment.
16. The terminal of claim 12, wherein the transceiver, when obtaining N antenna ports, is specifically configured to: and obtaining N antenna ports of the terminal according to the SRS resource indication information, wherein the SRS resource indicated by the SRS resource indication information comprises X SRS ports, and X is an integer larger than 1.
17. The terminal of claim 16, wherein the obtaining N antenna ports of the terminal according to the SRS resource indication information comprises:
the N antenna ports correspond to the X SRS ports one to one, and X is equal to N;
alternatively, the first and second electrodes may be,
an I-th antenna port of the N antenna ports is the same as an I-th SRS port of the SRS resource indicated by the SRS resource indication information, X is equal to N, and I is 1, 2, …, N;
alternatively, the first and second electrodes may be,
an I-th antenna port of the N antenna ports is an antenna port that is the same as X SRS ports of the SRS resource indicated by the SRS resource indication information and is formed by I-th precoding, where I is 1, 2, …, N.
18. The terminal of claim 11, wherein the N antenna ports are in one-to-one correspondence with the N target time-frequency resources.
19. The terminal of claim 18, wherein, when the transceiver is on the N target resources and N antenna ports of the terminal respectively transmit information on different target time-frequency resources, the transceiver is specifically configured to:
determining that an ith antenna port corresponds to an ith target time-frequency resource, I being 1, 2, …, N, among the N antenna ports according to a predetermined rule or indication information of the network device;
alternatively, the first and second electrodes may be,
according to the indication information of the network equipment, determining that the I antenna port corresponds to the (N + 1) -I target time-frequency resource, wherein I is 1, 2, … and N;
alternatively, the first and second electrodes may be,
the corresponding relations between the N antenna ports and the N target time frequency resources are the same or different on different time domain symbols.
20. A network device, comprising:
the terminal comprises a transceiver and a receiver, wherein the transceiver is used for sending downlink control information DCI or scheduling authorization to the terminal, the downlink control information DCI or scheduling authorization carries at least one of time domain resource allocation indication information, frequency domain resource allocation indication information and sounding reference signal SRS resource indication information, so that the terminal obtains N target time-frequency resources and N antenna ports of the terminal according to the indication information, N is an integer larger than 1, and the N antenna ports of the terminal respectively carry out information transmission on different target time-frequency resources.
21. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any one of claims 1 to 9, or the method of claim 10.
22. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 9, or the method of claim 10.
CN201910219318.1A 2019-03-21 2019-03-21 Data transmission method, information indication method, terminal and network equipment Pending CN111726868A (en)

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