CN108632841B

CN108632841B - Information transmission method and device

Info

Publication number: CN108632841B
Application number: CN201710194154.2A
Authority: CN
Inventors: 管鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-28
Publication date: 2021-12-03
Anticipated expiration: 2037-03-28
Also published as: CN108632841A

Abstract

The embodiment of the application discloses an information transmission method and device, relates to the technical field of communication, and the technical scheme considers the influence of beams on information transmission so as to improve the system performance. The method can comprise the following steps: acquiring a scrambled bit sequence according to the beam indication information; modulating the scrambled bit sequence and mapping the modulated bit sequence to a time frequency resource; and sending the scrambled bit sequence mapped to the time-frequency resource to the terminal equipment through the wave beam indicated by the wave beam indication information.

Description

Information transmission method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to an information transmission method and device.

Background

In a Long Term Evolution (LTE) system, a physical layer processing procedure of a Physical Downlink Control Channel (PDCCH) by a base station includes: the base station performs channel coding, rate matching, scrambling, modulation, cyclic shift, resource mapping and other operations on the original data bits and then sends out the original data bits. The technical scheme is no longer suitable for the requirement of New Radio (NR) NR.

Disclosure of Invention

The present application provides an information transmission method and apparatus that considers the effect of a beam on at least one of a scrambling operation and a cyclic shift operation, thereby improving system performance.

In order to improve the randomization effect and reduce the interference of the multi-beam base station to the neighboring cell. The application provides the following technical scheme:

in a first aspect, the present application provides a scrambling method and apparatus.

In one design, the scrambling method includes: and acquiring the scrambled bit sequence according to the beam indication information. The scrambled bit sequence may be a bit sequence obtained by scrambling any channel or data, which is not limited in this application. In the technical scheme, the beams are considered in the process of executing scrambling operation, so that PDCCHs transmitted on different beams can be scrambled by using different scrambling sequences, different beams can use different randomization techniques, the randomization effect can be improved, and the interference of the multi-beam base station to the adjacent cell can be reduced.

The obtaining the scrambled bit sequence according to the beam indication information includes: and acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on its initialization factor. And then, scrambling the bit sequence to be scrambled according to the scrambling sequence to obtain the scrambled bit sequence. The optional implementation manner provides a manner of performing scrambling operation according to the beam indication information, and is not limited to this specific implementation.

In another design, the scrambling method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and scrambling the scrambling sequence based on the scrambling sequence. In the design, because the scrambling sequence is obtained based on the initialization factor, and the initialization factor is associated with the beam indication information, the beam related information is fully considered in the scrambling process by using the scrambling sequence, so that different beams can use different randomization techniques, the randomization effect is improved, and the interference of the multi-beam base station to the adjacent cell can be reduced.

Correspondingly, the application also provides a scrambling device, and the scrambling method can be realized. For example, the scrambling apparatus may be a chip (e.g., a baseband chip, or a communication chip, etc.) or a transmitting device (e.g., a base station, or a terminal, etc.). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the scrambling apparatus includes a processor and a memory. The processor is configured to enable the apparatus to perform the corresponding functions in the scrambling method described above. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the scrambling apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. The communication interface may be a transceiver.

In another possible implementation, the apparatus may include: and the scrambling unit is used for acquiring the scrambled bit sequence according to the beam indication information. Optionally, the scrambling unit may specifically be configured to: and acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on its initialization factor. And then, scrambling the bit sequence to be scrambled according to the scrambling sequence to obtain the scrambled bit sequence.

In a second aspect, the present application provides a descrambling method and apparatus.

In one design, the method includes: and descrambling the scrambled bit sequence according to the beam indication information. The technical solution corresponds to the scrambling method provided in the first aspect, so that reference may be made to the above for achieving beneficial effects, which is not described herein again.

It can be understood that, if the scrambled bit sequence is applied in the downlink transmission process, the main execution body of the method may be a terminal device (e.g., UE). If the scrambled bit sequence is applied to the uplink transmission process, the main execution body of the method may be a network device (e.g., a base station).

The descrambling the scrambled bit sequence according to the beam indication information may include: and acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on its initialization factor. Then, the scrambled bit sequence is descrambled according to the scrambling sequence. The optional implementation manner provides a manner of descrambling the scrambled bit sequence according to the beam indication information, and is not limited to this specific implementation.

In another design, the method includes: the method comprises the steps of generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and descrambling a sequence to be descrambled based on the scrambling sequence. Due to the design of the initialization factor, the beam indication information is considered by the scrambling sequence, so that the randomization effect can be better improved, and the interference is reduced.

Correspondingly, the application also provides a descrambling device, and the descrambling device can realize the descrambling method. The descrambling means may be, for example, a chip (e.g., a baseband chip, or a communication chip, etc.) or a transmitting device (e.g., a base station, or a terminal, etc.). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the structure of the descrambling device includes a processor, a memory; the processor is configured to enable the apparatus to perform the corresponding functions in the scrambling method described above. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the descrambling device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface may be a transceiver.

In another possible implementation manner, the descrambling apparatus may include a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information. Optionally, the descrambling unit may be specifically configured to: first, according to the beam indication information, an initialization factor of the scrambling sequence is obtained. The scrambling sequence is then determined based on its initialization factor. Then, the scrambled bit sequence is descrambled according to the scrambling sequence.

Based on the scrambling method and the descrambling method, in the scrambling or descrambling scheme, the initialization factor of the scrambling sequence can be obtained according to the beam indication information, the cell information and the time slot number. The cell information may be a cell Identification (ID), or a cell index, information obtained based on the cell ID or the cell index, or information related to the cell information. The slot number may be a slot number of a slot occupied when the scrambled bit sequence is transmitted.

In an optional implementation manner, the scrambling sequence is obtained according to the beam indication information, the cell index and the time slot numberInitialization factors for the columns may include: according to the formula

Obtaining an initialization factor c of a scrambling sequence_init(ii) a Wherein the content of the first and second substances,

denotes rounding down, n_sWhich indicates the number of the time slot,

denotes a cell index, and offset denotes a value associated with the beam indication information.

In a third aspect, the present application provides an information transmission method, and an execution subject of the method may be a sending device. The method comprises the following steps: and acquiring the scrambled bit sequence according to the beam indication information. And then, mapping the scrambled bit sequence to a time-frequency resource after modulation, and sending the scrambled bit sequence mapped to the time-frequency resource through the wave beam indicated by the wave beam indication information. In this technical solution, the transmitting device considers the beam in the process of performing the scrambling operation, and the explanation of the related content, the specific implementation manner of the related step, and the beneficial effects thereof can refer to the description in the scrambling scheme above.

In one possible implementation, the beam indication information may be transmitted to the terminal device through RRC signaling, MAC signaling, or DCI.

Correspondingly, an information transmission device is also provided, so as to implement the information transmission method of the third aspect. The apparatus can be implemented by software, or hardware, or by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions.

In one possible implementation, the apparatus may include: a scrambling unit, a mapping unit and a transmitting unit. The scrambling unit is used for acquiring the scrambled bit sequence according to the beam indication information. And the mapping unit is used for mapping the scrambled bit sequence to the time-frequency resource after modulation. And the sending unit sends the scrambled bit sequence mapped to the time-frequency resource through the wave beam indicated by the wave beam indication information.

In another possible implementation, the apparatus has a structure including a processor, a memory, and a communication interface; the processor is configured to enable the apparatus to perform the corresponding functions of the method of the third aspect. The communication interface is used to support communication between the apparatus and other network elements. The memory is for coupling to the processor and holds the necessary program instructions and data for the device. The communication interface may specifically be a transceiver.

In a fourth aspect, the present application provides an information transmission method, where an execution subject of the method may be a receiving device, and the method may include: firstly, receiving a scrambled bit sequence which is sent by a wave beam and mapped to a time-frequency resource; wherein the scrambled bit sequence is a bit sequence determined according to beam indication information, and the beam indication information is used for indicating a beam. Then, from the time frequency resource, the scrambled bit sequence is obtained. And finally, descrambling the scrambled bit sequence according to the beam indication information. In this technical solution, the terminal device considers a beam in the process of performing a descrambling operation, and the explanation of the related content, the specific implementation manner of the related step, and the beneficial effects thereof can refer to the descrambling method provided in the second aspect.

In one possible implementation, the beam indication information may be received through RRC signaling, MAC signaling, or DCI.

In one possible implementation, the apparatus may include: the device comprises a receiving unit, an obtaining unit and a descrambling unit. The receiving unit is used for receiving a scrambled bit sequence which is sent by a wave beam and mapped to a time frequency resource; wherein the scrambled bit sequence is a bit sequence determined according to beam indication information, and the beam indication information is used for indicating a beam. And the acquisition unit is used for acquiring the scrambled bit sequence from the time-frequency resource. And the descrambling unit is used for descrambling the scrambled bit sequence according to the beam indication information.

In another possible implementation, the apparatus has a structure including a processor, a memory, and a communication interface; the processor is configured to enable the apparatus to perform the corresponding functions of the method of the fourth aspect. The communication interface is used to support communication between the apparatus and other network elements. The memory is for coupling to the processor and holds the necessary program instructions and data for the device. The communication interface may specifically be a transceiver.

In order to improve the randomization effect and reduce the interference of the multi-beam base station to the neighboring cell. Optionally, to solve the problem of self-interference between multiple beams, and the like. The application also provides the following technical scheme:

in a fifth aspect, the present application provides a cyclic shift method and apparatus.

In one design, the cyclic shift method includes: according to the beam indication information, carrying out cyclic shift on the first symbol group to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits. In the technical scheme, the base station considers the wave beams in the process of executing the cyclic shift operation, so that symbol sequences obtained after the PDCCH transmitted on different wave beams is subjected to the cyclic shift can be different, the PDCCH transmitted on different wave beams can use different randomization techniques, the randomization effect can be improved, and the interference of the multi-beam base station on the adjacent cell can be reduced. Optionally, because the technical scheme may implement that scrambling sequences corresponding to any multiple beams are different, the problem of self-interference among the multiple beams caused in a scenario in which the base station uses the multiple beams to simultaneously send the PDCCH to the same terminal device may be solved. In addition, the problem that the plurality of beams are not fully utilized in a scene that the base station uses the plurality of beams to sequentially transmit the PDCCH to the same terminal device can be solved.

The performing cyclic shift on the first symbol group according to the beam indication information to obtain a second symbol group may include: and according to the beam indication information and the cell index, performing cyclic shift on the first symbol group to obtain a second symbol group. The cell index refers to a cell index of a cell in which the terminal device is located.

Correspondingly, the application also provides a cyclic shift device, and the cyclic shift method can be realized. For example, the cyclic shift apparatus may be a chip (e.g., a baseband chip, or a communication chip, etc.) or a transmitting device (e.g., a base station, or a terminal, etc.). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the cyclic shift apparatus includes a processor and a memory. The processor is configured to enable the apparatus to perform a corresponding function in the above-described cyclic shift method. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the cyclic shift apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. The communication interface may be a transceiver.

In another possible implementation manner, the cyclic shift apparatus may include: the cyclic shift unit is used for carrying out cyclic shift on the first symbol group according to the beam indication information to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits. In a possible implementation manner, the cyclic shift unit may specifically be configured to: and according to the beam indication information and the cell index, performing cyclic shift on the first symbol group to obtain a second symbol group. The cell index refers to a cell index of a cell in which the terminal device is located.

In a scheme provided in the fifth aspect, the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain a second symbol group may include: according to the formula

Obtaining a second symbol group; w (i) denotes the second symbol in the first symbol groupThe number of the i elements is such that,

representing the ith element in the second symbol set,

denotes a cell index, and offset denotes a value associated with beam indication information.

In a sixth aspect, the present application provides a cyclic shift inversion operation method and apparatus.

In one design, the method may include: and according to the beam indication information, performing cyclic shift inverse operation on the second symbol group to obtain a first symbol group. The second symbol group is a symbol group obtained by circularly shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bits. The technical solution corresponds to the cyclic shift method provided in the fifth aspect, and therefore, reference may be made to the above for achieving beneficial effects, which is not described herein again.

Correspondingly, the application also provides a cyclic shift reverse operation device. The above cyclic shift inversion operation method can be implemented. For example, the cyclic shift inverse operation device may be a chip (e.g., a baseband chip, or a communication chip, etc.) or a receiving device (e.g., a base station, or a terminal, etc.). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the cyclic shift reverse operation device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions in the above-described cyclic shift inversion operation method. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the cyclic shift reverse operation apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. The communication interface may be a transceiver.

In another possible implementation manner, the cyclic shift inverse operation device may include: and the cyclic shift inverse operation unit is used for carrying out cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group. The second symbol group is a symbol group obtained by circularly shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bit

In an aspect provided by the sixth aspect, performing a cyclic shift inversion operation on the second symbol group according to the beam indication information to obtain the first symbol group may include: and performing cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index to obtain a first symbol group.

In a possible implementation manner, performing a cyclic shift inversion operation on the second symbol group according to the beam indication information and the cell index to obtain the first symbol group may include: according to the formula

Obtaining a first symbol group; wherein the content of the first and second substances,

denotes the ith element in the second symbol group, w (i) denotes the ith element in the first symbol group,

In a seventh aspect, the present application provides an information transmission method and apparatus, where an execution subject of the method may be a sending device (e.g., a base station), and the method may include the following steps: firstly, according to the beam indication information, carrying out cyclic shift on a first symbol group to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits. And secondly, mapping the second symbol group to time frequency resources. And finally, sending the second symbol group mapped to the time-frequency resource to the terminal equipment through the beam indicated by the beam indication information. In this technical solution, beams are considered in the process of performing the cyclic shift operation, and the explanation of the related content, the specific implementation manner of the related step, and the beneficial effects thereof can refer to the above cyclic shift method.

In one possible implementation, the method may further include: and transmitting the beam indication information to the terminal equipment through RRC signaling, MAC signaling or DCI.

Correspondingly, an information transmission device is also provided, which can realize the information transmission method of the seventh aspect. For example, the apparatus may be a transmitting device (e.g., a base station, or a terminal). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the information transmission device includes a processor and a memory. The processor is configured to enable the apparatus to perform the corresponding functions of the method of the seventh aspect. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the information transmission apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. The communication interface may be a transceiver.

In another possible implementation, the information transmission apparatus includes: the device comprises a cyclic shift unit, a mapping unit and a sending unit. The cyclic shift unit is used for performing cyclic shift on the first symbol group according to the beam indication information to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits. And the mapping unit is used for mapping the second symbol group to the time frequency resource. And the sending unit is used for sending the second symbol group mapped to the time-frequency resource to the terminal equipment through the wave beam indicated by the wave beam indication information.

In an eighth aspect, the present application provides an information transmission method and apparatus, where an execution subject of the method may be a receiving device (e.g., a terminal), and the method may include the following steps: firstly, receiving a second symbol group which is sent by a wave beam and mapped to time frequency resources; the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, the first symbol group is a symbol group obtained by modulating the original data bit, and the beam indication information is used for indicating the beam. And acquiring a second symbol group from the time-frequency resource. And according to the beam indication information, performing cyclic shift inverse operation on the second symbol group to obtain a first symbol group. In the technical scheme, the terminal device considers the beam in the process of executing the cyclic shift inverse operation, and the explanation of the related content, the specific implementation manner of the related step, and the beneficial effects thereof can refer to the cyclic shift inverse operation method.

Correspondingly, an information transmission device is also provided, and the information transmission method in the eighth aspect can be realized. For example, the apparatus may be a receiving device (e.g., a base station, or a terminal). The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In one possible implementation, the information transmission device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions in the method of the above-mentioned eighth aspect. The memory is used for coupling with the processor and holds the necessary programs (instructions) and data for the device. Optionally, the information transmission apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. The communication interface may be a transceiver.

In another possible implementation manner, the information transmission device comprises a receiving unit, an obtaining unit and a cyclic shift inverse operation unit. The receiving unit is used for receiving a second symbol group which is sent by a wave beam and mapped to the time frequency resource; the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, the first symbol group is a symbol group obtained by modulating the original data bit, and the beam indication information is used for indicating the beam. And the acquisition unit is used for acquiring the second symbol group from the time-frequency resource. And the cyclic shift inverse operation unit is used for carrying out cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group.

The optional receiving unit may be further configured to receive the beam indication information through RRC signaling, MAC signaling, or DCI.

In a ninth aspect, there is also provided an information transmission apparatus, comprising

A scrambling unit, configured to obtain a scrambled bit sequence according to the beam indication information;

a mapping unit, configured to map the scrambled bit sequence to a time-frequency resource after modulation;

a sending unit, configured to send the scrambled bit sequence mapped to the time-frequency resource to a terminal device through the beam indicated by the beam indication information.

In one possible design, the scrambling unit is specifically configured to:

acquiring an initialization factor of a scrambling sequence according to the beam indication information;

determining the scrambling sequence according to the initialization factor of the scrambling sequence;

and scrambling the bit sequence to be scrambled according to the scrambling sequence to obtain the scrambled bit sequence.

In another possible design, when the scrambling unit acquires the initialization factor of the scrambling sequence according to the beam indication information, the scrambling unit is specifically configured to:

and acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index and the time slot number.

In another possible design, when the scrambling unit acquires the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, the scrambling unit is specifically configured to:

according to the formula

denotes rounding down, n_sWhich indicates the number of the time slot,

indicating cell index, offset indicating phase with the beam indication informationA value of off.

In another possible design, the sending unit is further configured to: and transmitting the beam indication information to the terminal equipment through Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or Downlink Control Information (DCI).

In a tenth aspect, there is also provided an information transmission apparatus, the apparatus including:

a receiving unit, configured to receive a scrambled bit sequence mapped to a time-frequency resource and sent by a beam; wherein the scrambled bit sequence is a bit sequence determined according to beam indication information, the beam indication information being used to indicate the beam;

an obtaining unit, configured to obtain the scrambled bit sequence from the time-frequency resource;

and the descrambling unit is used for descrambling the scrambled bit sequence according to the beam indication information.

In one possible design, the descrambling unit is specifically configured to:

and descrambling the scrambled bit sequence according to the scrambling sequence.

In another possible design, when the descrambling unit executes the obtaining of the initialization factor of the scrambling sequence according to the beam indication information, the descrambling unit is specifically configured to:

and acquiring an initialization factor of a scrambling sequence according to the beam indication information, the cell index and the time slot number.

In another possible design, when the descrambling unit acquires the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, the descrambling unit is specifically configured to:

according to the formula

Obtaining plusInitialization factor c of scrambling sequence_init(ii) a Wherein the content of the first and second substances,

denotes rounding down, n_sWhich indicates the number of the time slot,

In another possible design, the receiving unit is further configured to: and receiving the beam indication information through Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or Downlink Control Information (DCI).

In an eleventh aspect, there is also provided an information transmission apparatus, comprising:

the cyclic shift unit is used for carrying out cyclic shift on the first symbol group according to the beam indication information to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits;

a mapping unit, configured to map the second symbol group to a time-frequency resource;

a sending unit, configured to send the second symbol group mapped to the time-frequency resource to a terminal device through the beam indicated by the beam indication information.

In one possible design, the cyclic shift unit is specifically configured to: and according to the beam indication information and the cell index, performing cyclic shift on the first symbol group to obtain a second symbol group.

In another possible design, the cyclic shift unit performs cyclic shift on the first symbol group according to the beam indication information and the cell index to obtain a second symbol group, and is specifically configured to:

according to the formula

Obtaining a second symbol group; wherein w (i) denotes the ith element in the first symbol group,

representing the ith element in the second symbol group, said

In another possible design, the method is characterized in that,

the sending unit is further configured to: and transmitting the beam indication information to the terminal equipment through Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or Downlink Control Information (DCI).

In a twelfth aspect, an information transmission apparatus is further provided, where the apparatus includes:

a receiving unit, configured to receive a second symbol group mapped to a time-frequency resource and transmitted through a beam; the second symbol group is a symbol group obtained by cyclically shifting a first symbol group according to beam indication information, the first symbol group is a symbol group obtained by modulating original data bits, and the beam indication information is used for indicating the beam;

an obtaining unit, configured to obtain the second symbol group from the time-frequency resource;

and a cyclic shift inversion operation unit, configured to perform cyclic shift inversion operation on the second symbol group according to the beam indication information, so as to obtain the first symbol group.

In one possible design, the cyclic shift inverse operation unit is specifically configured to: and performing cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index to obtain the first symbol group.

In another possible design, when the cyclic shift inversion operation unit performs the cyclic shift inversion operation on the second symbol group according to the beam indication information and the cell index to obtain the first symbol group, the cyclic shift inversion operation unit is specifically configured to:

according to the formula

Obtaining the first symbol group; wherein the content of the first and second substances,

represents the ith element in the second symbol group, w (i) represents the ith element in the first symbol group, the

Based on any one of the aspects provided above or any one of the possible implementations provided by any one of the aspects, the beam indication information may include at least one of the following information: the relative number of the wave beam, the logic number of the wave beam, the physical number of the wave beam, the port number, the quasi co-location QCL information, the wave beam pair connection information, the terminal equipment group, the time domain symbol corresponding to the wave beam and the number of the synchronization block SS block; and the terminal equipment corresponding to each beam is a terminal equipment group. For the correlation between the offset and the beam indication information, reference may be made to the specific embodiments, which are not described herein again.

The present application also provides a computer storage medium having stored thereon a computer program (instructions) for performing the method of any of the above aspects.

The present application also provides a computer program product which, when run on a computer, causes the computer to perform the method of any of the above aspects.

It is understood that any one of the apparatuses or computer storage media or computer program products provided above is used for executing the corresponding method provided above, and therefore, the beneficial effects achieved by the apparatuses or computer storage media can refer to the beneficial effects in the corresponding methods provided above, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a processing flow of a base station for a PDCCH in an LTE system according to the prior art;

fig. 2 is a schematic diagram of a processing flow of a PDCCH by a UE in an LTE system according to the prior art;

fig. 3 is a schematic diagram of a system architecture to which the technical solution provided by the embodiment of the present application is applied;

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

fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 6 is a schematic diagram of a scenario to which the technical solution provided in the embodiment of the present application is applied;

fig. 7 is a schematic diagram of another scenario to which the technical solution provided in the embodiment of the present application is applied;

fig. 8 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a scrambling operation performed by a base station according to an embodiment of the present application;

fig. 9a is a schematic diagram of beam indication information provided in an embodiment of the present application;

fig. 9b is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 9c is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 9d is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 9e is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 9f is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 9g is a schematic diagram of another beam indication information provided in the embodiment of the present application;

fig. 10 is a schematic flowchart of another information transmission method according to an embodiment of the present application;

fig. 11 is a flowchart illustrating a UE performing a descrambling operation according to an embodiment of the present application;

fig. 12 is a schematic flowchart of another information transmission method according to an embodiment of the present application;

fig. 13 is a flowchart illustrating a base station performing a cyclic shift operation according to an embodiment of the present disclosure;

fig. 14 is a schematic flowchart of another information transmission method according to an embodiment of the present application;

fig. 15 is a flowchart illustrating a UE performing a cyclic shift inversion operation according to an embodiment of the present disclosure;

fig. 16 is a schematic structural diagram of an information transmission apparatus according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of another information transmission device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present application.

Detailed Description

First, related technologies and related terms related to the present application are briefly described to facilitate understanding:

1) time domain resource of transmission control channel

In the LTE system, channels are transmitted in units of radio frames (radio frames). One radio frame includes 10 subframes (subframes), each having a length of 1 millisecond (ms), and each including two slots (slots), each slot being 0.5 ms. The number of symbols included in each slot is related to the length of the Cyclic Prefix (CP) in the subframe. If the CP is a normal (normal) CP, each slot comprises 7 symbols and each subframe consists of 14 symbols, e.g., each subframe may consist of symbols with sequence numbers #0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12, #13, respectively. If the CP is a long (extended) CP, each slot includes 6 symbols and each subframe consists of 12 symbols, for example, each subframe may consist of symbols with sequence numbers #0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, # 11. Here, the "symbol" refers to an orthogonal frequency division multiple access (OFDM) symbol.

In LTE systems, the PDCCH is typically transmitted on the first or first two or first three OFDM symbols of a subframe, which may be referred to as control symbols. For example, if the bandwidth of the LTE system is 1.4 megahertz (MHz), the PDCCH may be transmitted on the {2,3,4} th OFDM symbol.

2) Time-frequency resource of transmission control channel

In the LTE system, a Resource Element (RE) is the smallest time-frequency resource element. REs may be uniquely identified by an index pair (k, l), where k is a subcarrier index and l is a symbol index. 4 consecutive REs (where the REs occupied by the reference signal are not calculated) constitute 1 Resource Element Group (REG). REGs may be identified by an index pair (k ', l').

When the control channel is transmitted, a basic unit of a time-frequency resource carrying the control channel is a Control Channel Element (CCE). One CCE contains 9 REGs. The PDCCH may be transmitted with different Aggregation Levels (AL). Wherein the aggregation level refers to how many CCEs the PDCCH carries. The aggregation level may be 1,2,4,8, e.g. an aggregation level of 2 means that the PDCCH is carried on 2 CCEs.

3) Time-frequency resource available for PDCCH

The time-frequency resource corresponding to the symbol where the PDCCH is located (wherein, in the LTE system, the symbol generally refers to the first symbol) may also carry the following information: a Reference Signal (RS), a physical control frame format indication channel (PCFICH), a Physical HARQ Indication Channel (PHICH); wherein HARQ is an english abbreviation of automatic hybrid repeat request (hybrid automatic repeat request).

The PCFICH carries Control Format Indication (CFI) information, and the CFI information is used to notify a User Equipment (UE) of the number of symbols occupied by a control channel. The CFI information may be used by the UE to calculate the total number of resources occupied by the control channel. The CFI information may also be used by the UE to determine the starting position of the data channel in the time domain, i.e. the data channel starting from the few symbols. The PCFICH is a channel of a broadcast nature. The base station may transmit the PCFICH on the first symbol of one subframe. The configuration of the PCFICH itself is signaled by other signaling.

If the UE sends uplink data, the UE may wait for the base station to make feedback on whether the uplink data is correctly received. The PHICH may be used as HARQ feedback for UE uplink data. The PHICH is a multicast-nature channel. The base station may transmit PHICH on the first OFDM symbol of one subframe. The configuration of the PHICH itself is notified by a Master Information Block (MIB) carried on a Physical Broadcast Channel (PBCH).

The total REG number corresponding to the symbols occupied by the control channel is determined by the number of symbols and the bandwidth. The total REG number minus the time-frequency resources occupied by the PCFICH and PHICH, i.e., the time-frequency resources available for PDCCH.

4) Search space

In order to reduce the complexity of the UE, two search spaces, namely a common search space and a UE-specific search space, are defined in the LTE system. In the common search space, the aggregation level of the PDCCH may be 4, 8. In the UE-specific search space, the PDCCH aggregation level may be 1,2,4, 8. In LTE, it is specified that a PDCCH can only be composed of consecutive n CCEs, and only the i-th CCE is used as a starting position, where i mod n is 0.

5) Randomization (randomisation)

In a mobile communication system, interference between cells (or between base stations) is an important factor limiting performance. Wherein the interference between cells and the interference between base stations are not distinguished in the following. Particularly, in a cellular communication system based on OFDM, such as LTE, 5G, etc., because cells are densely arranged, the strength of inter-cell interference is large, and the interference source is not easily determined, thereby affecting the receiving performance of the receiving end.

In order to solve the problem, in the LTE system, a plurality of interference randomization techniques are employed between different cells to whiten the interference as much as possible, thereby achieving better interference suppression at the receiving end. The interference randomization techniques include interleaving, scrambling, cyclic shifting, etc. That is, randomization can be understood as: when the interference intensity is large and the interference source is not easy to determine, the interference is whitened by adopting a statistical method.

6) Symbol group

A symbol group refers to a set of a plurality of modulation symbols. The modulation symbol refers to a symbol obtained by modulation. The present application does not limit the modulation scheme, and for example, if the modulation scheme is Quadrature Phase Shift Keying (QPSK) modulation, the modulation symbol refers to a QPSK symbol; when the modulation scheme is Quadrature Amplitude Modulation (QAM), the modulation symbols are QAM symbols.

As will be understood by those skilled in the art from the foregoing description, it should be clear that "symbol" in the present application refers to an OFDM symbol, or a modulation symbol. For example, "symbol" in "symbol sequence" refers to a modulation symbol, and "symbol" in "symbol group" also refers to a modulation symbol. The "symbol" of the "occupied symbol" refers to an OFDM symbol.

7) Beam (beam) and beam pair (beam pair link)

A beam is a communication resource. The beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technical means. The beamforming technique may be embodied as a digital beamforming technique, an analog beamforming technique, or a hybrid beamforming technique. Different beams may be considered different resources. The same information or different information may be transmitted through different beams. Alternatively, a plurality of beams having the same or similar communication characteristics may be regarded as one beam. One or more antenna ports may be included in a beam for transmitting data channels, control channels, sounding signals, and the like. For example, a transmit beam may refer to the distribution of signal strength in different directions in space after a signal is transmitted through an antenna. A receive beam may refer to the distribution of signal strength of a wireless signal received from an antenna in spatially different directions. It is to be understood that the one or more antenna ports forming one beam may also be seen as one set of antenna ports.

The beam pairs are built on the concept of beams. A beam pair typically includes a transmit beam at a transmitting end and a receive beam at a receiving end. Note that, the "beam" hereinafter refers to a transmission beam of the base station, and the present application does not limit the reception beam of the UE.

8) Other terms

The term "plurality" herein means two or more.

The terms "first", "second", and the like herein are used merely to distinguish different objects, and do not limit the order thereof. For example, the first symbol group and the second symbol group are only for distinguishing different symbol groups, and the order of the symbol groups is not limited.

The term "and/or" herein is merely an association describing 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; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

The following describes a processing procedure of PDCCH by a base station and a UE in an LTE system:

as shown in fig. 1, a schematic diagram of a process flow of a base station for a PDCCH in an LTE system may specifically include the following steps S101 to S113:

s101: the base station determines the original data bits. In this embodiment, the base station sends PDCCH as an example, and sends Downlink Control Information (DCI) to the UE in the kth subframe. In this case, the original data bit is the DCI.

S102: the base station adds a CRC to the original data bits, where the length of the CRC may be defined by the protocol.

The bit sequence obtained after the base station performs S102 may be represented as: c. C₀,c₁,c₂,c₃,...,c_K-1. Where K denotes the length of the bit sequence obtained by adding CRC.

S103: and the base station carries out channel coding on the bit sequence obtained after the CRC is added.

Channel coding is one of the most important components in a communication system and can provide error detection and correction capabilities for the transmission of information bits. The LTE may use tail-biting convolutional coding (TBCC) for coding the control channel, and the 5G New Radio (NR) may use Polar code for coding the control channel. This is not limited in this application.

S104: and the base station performs rate matching on the bit sequence obtained after the channel coding.

Rate matching refers to matching the number of bits to be transmitted (i.e. the number of bits of the bit sequence obtained after channel coding) to the number of bits that can be carried by the allocated resources. Common rate matching methods may include retransmission, truncation, puncturing, and the like.

S105: and the base station carries out CCE aggregation on the bit sequence obtained after the rate matching.

Total number of CCEs in the system

Wherein the content of the first and second substances,

indicating a rounding down. N is a radical of_REGIndicates the total number of REGs that the PDCCH can transmit, i.e., the total number of REGs excluding the REGs occupied by the PHICH and the PCFICH. As can be seen from the above description, one PDCCH can be transmitted in {1,2,4,8} CCE aggregations. 72 bits of information may be mapped on each CCE.

S106: and the base station performs resource multiplexing on the bit sequence obtained after CCE aggregation and other PDCCHs. Here, multiplexing refers to transmitting a plurality of PDCCHs on the same resource.

The other PDCCH and the PDCCH in S101 may be the same PDCCH sent to the same UE, or may be PDCCHs sent to different UEs.

For example, assume that the ith PDCCH has a bit sequence length of

And represents the bit sequence as

Then, the base station pair n_PDCCHThe bit sequence obtained after resource multiplexing of each PDCCH may be:

for the sake of brevity, this sequence is defined as b (i) in the present application, and the total length of b (i) is

For example, CCEn, i.e. the nth CCE, may map the bit sequence as: b (72 × n), b (72 × n +1), …, b (72 × n + 71). If CCE is not occupied, < NIL > is correspondingly added.

S107: and the base station scrambles the bit sequence obtained after resource multiplexing.

Scrambling refers to the modulo-two addition of one sequence (i.e., the scrambling sequence) to another sequence (i.e., the sequence of bits to be scrambled) to randomize the interference between adjacent cells. In the LTE protocol, scrambling is performed according to the following formula:

wherein the content of the first and second substances,

represents the bit sequence obtained after scrambling, and b (i) represents the bit sequence to be scrambled, namely b (i) described in the above example of S106) And c (i) denotes a scrambling sequence. The scrambling sequence c (i) may be one associated with a cell ID (cell ID) and slot number n_sThe related sequences. Wherein, the cell ID refers to the cell ID of the cell in which the UE is located, n_sRefers to the slot code used when transmitting the PDCCH. Optionally, an initialization factor c of the scrambling sequence c (i)_initIs a cell ID and slot number n_sThe associated value. Specifically, the method comprises the following steps:

s108: and the base station modulates the bit sequence obtained after scrambling.

In the LTE system, a QPSK modulation scheme is generally used for modulating the PDCCH, that is, 2 bits are modulated into one QPSK symbol, and the specific modulation scheme is not limited in the present application. For those obtained in S107

After modulation, a symbol sequence d (m) is obtained.

S109: the base station performs layer mapping (layer mapping) and precoding (precoding) on the modulated symbol sequence.

The precoding is an optional step, and for the sake of simplicity of representation, the following specific examples are described without considering this step. The present application does not limit the specific implementation manner of S109. Taking an antenna port as an example, a symbol sequence obtained by performing layer mapping and precoding on the symbol sequence d (m) is denoted as y (m).

S110: and the base station interweaves and cyclically shifts the symbol sequence obtained after precoding.

In the LTE system, interleaving and cyclic shift operations are performed in units of quadruplets (quadruplets). Taking one antenna port as an example, one quadruplet z (i) < y (4i), y (4i +1), y (4i +2), y (4i +3) >. The quadruplet sequence may be represented as z (0), z (1), z (2), z (3) … …. Interleaving and cyclic shift are performed with quadruple sequence as objects. Assuming that information obtained by the element z (i) in the quadruplet sequence after the interleaving operation is performed on the quadruplet sequence by the base station is denoted as w (i), the information obtained after the interleaving operation is performed on the quadruplet sequence z (0), z (1), z (2), z (3) … … by the base station can be denoted as w (0), w (1), w (2), w (3) … …

The cyclic shift is associated with the cell ID. The information mark obtained after the base station executes the cyclic shift operation to the element w (i) in the quadruplet sequence

Then:

wherein M is_quadRepresenting the number of quadruplets, M_quadRepresents the number of QPSK symbols divided by 4, i.e.: m_quad＝M_symb/4。

S111: and the base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of time domain first and frequency domain second.

Resource mapping refers to mapping a symbol sequence to a time-frequency resource. Taking one antenna port as an example, the resource mapping means to map the antenna ports with the resources

Mapping to the port corresponding REG (k ', l'). In the LTE system, the mapping rule is that the time domain is performed first and then the frequency domain, for example, taking 3 symbols occupied by the control channel as an example, the resource mapping specifically may be: the base station will

Mapping to REG (0,0), will

Mapping to REG (0,1), will

Mapping to REG (0,2), will

Mapping to REG (1,0) … …

S112: the base station performs Inverse Fast Fourier Transform (IFFT) on the information mapped to the time-frequency resources.

The QPSK symbols on the subcarriers are modulated into an OFDM waveform by IFFT.

S113: and the base station sends the signals obtained after IFFT, namely OFDM time domain signals, to the UE.

As shown in fig. 2, a schematic diagram of a processing flow of a PDCCH by a UE in an LTE system is shown, where the UE receives the PDCCH in a k-th subframe (i.e., subframe k), and the modulation scheme is a QPSK modulation scheme as an example. The method may include the following steps S201 to S209:

s201: the UE listens to the control channel in subframe k. The signal monitored by the UE (i.e., the signal received by the UE) is a radio signal carried by an OFDM waveform, i.e., an OFDM time domain signal.

S202: the UE performs Fast Fourier Transform (FFT) on the monitored signal.

After the UE performs FFT, the OFDM symbols may be transformed into QPSK symbols, resulting in a sequence of symbols.

S203: and the UE performs de-interleaving and cyclic shift on the symbol sequence obtained after the FFT. The process of deinterleaving and cyclic shift corresponds to S110, and may be regarded as the reverse process of S110.

S204: and the UE demodulates the symbol sequence obtained after the cyclic shift.

After the UE performs demodulation, the symbol sequence may be changed into a bit sequence. The demodulation process corresponds to S108, and may be regarded as the reverse process of S108.

S205: and the UE descrambles the bit sequence obtained after demodulation.

The descrambling process corresponds to S107 and may be regarded as the reverse process of S107.

S206: and the UE performs blind detection on the bit sequence obtained by descrambling.

Blind detection refers to the UE attempting to search for the location and aggregation level of all possible alternative PDCCHs within the space. The specific implementation mode of the blind detection is not limited in the application. For example, the m-th candidate PDCCH obtained by blind detection may be composed of the following CCEs:

where L represents an aggregation level, which may be {1,2,4,8 }. N is a radical of_CCE,kIndicating the number of CCEs used for the outgoing control channel within subframe k. i-0, …, L-1. M ═ 0.., M^(L)-1。M^(L)Indicating the number of candidate PDCCHs when the aggregation level is L, LTE specifies a search space dedicated to the UE, and M is set to {1,2,4,8}^(L)Respectively {6,6,2,2}, and for a common search space, L ═ 4,8}, M^(L)Respectively {4,2 }.

For a common search space, m ═ m, Y_k＝0。

For UE-specific search spaces, M' ═ M + M^(L)·n_CI，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNTI≠0,A＝39827,D＝65537,

Wherein n is_RNTIIndicating a UE ID to identify a UE. n is_CIIs a carrier indication, and is 0 in the case of a single carrier. n is_sIs a slot number within a radio frame.

S207: and the UE performs rate de-matching on the alternative PDCCH obtained by blind detection.

The process of rate de-matching corresponds to S104 and can be considered as the reverse process of S104.

S208: and the UE performs channel decoding on the bit sequence obtained by rate de-matching.

S209: and the UE performs CRC check on the bit sequence obtained by channel decoding.

The UE determines whether the reception is correct through CRC check, that is, whether the candidate PDCCH obtained through blind detection in S206 is actually the PDCCH addressed to the UE. And if the PDCCH is unsuccessful, performing blind detection to obtain the next alternative PDCCH until all alternative PDCCHs are traversed. If successful, it indicates that the candidate PDCCH obtained by blind detection in S206 is the PDCCH sent to the UE.

According to the discussion of 5G NR, in order to guarantee robustness of a control channel (robustness), a PDCCH may be transmitted to one UE using a plurality of beams. Multiple beams may be used simultaneously for communication between the UE and the base station. Robustness may be understood as stability or robustness, among others.

However, as can be seen from the above description, the above-provided technical solutions have at least the following technical problems:

first, LTE does not itself consider the information processing flow related to the beam.

Secondly, in a scenario where a base station transmits a PDCCH to the same UE using multiple beams, if the above processing procedure is still used, when multiple beams of the same base station transmit the PDCCH to the same UE, a similar randomization method is used. Specifically, multiple beams of the same base station transmit the same PDCCH at the same frequency position, and use the same scrambling sequence and cyclic shift scheme by using the same interleaving method. This can diminish the randomization and can cause the multi-beam base station to have a greater interference strength with the neighbor cell. Wherein the interference strength is proportional to the number of beams. A multi-beam base station refers to a base station that communicates with the same UE using multiple beams.

Thirdly, in a scenario where the base station transmits the PDCCH to the same UE using multiple beams, if the above processing procedure is still used, and the base station simultaneously transmits the PDCCH to the same UE using multiple beams, information transmitted by the multiple beams is the same, and if correlation between the beams is not low enough, the multiple beams may generate self-interference, thereby reducing channel capacity.

Fourthly, in a scenario where the base station transmits the PDCCH to the same UE using multiple beams, if the above processing procedure is still used, the base station sequentially transmits the PDCCH to the same UE using multiple beams, for example, one beam is used for one symbol. At this time, the frequency domain resources corresponding to the two symbols are completely the same for the UE. In this way, only diversity in the spatial domain by the plurality of beams is obtained, and the condition of the plurality of beams is not fully utilized.

Based on this, the application provides an information transmission method and device. The method specifically comprises the steps of improving the randomization effect and reducing the interference intensity of the multi-beam base station to the adjacent cell by considering the influence of the beam on the information processing process. The process takes full advantage of the multi-beam condition. Optionally, in a scenario where the base station transmits the PDCCH to the same UE by using multiple beams simultaneously, the self-interference between the multiple beams may be reduced, so as to enhance the channel capacity.

The technical solutions in the present application will be described in detail below with reference to the accompanying drawings in the present application.

The technical scheme provided by the application can be applied to the system architecture shown in fig. 3. The system architecture shown in fig. 3 includes a network device 100 and one or more terminal devices 200 connected to the network device 100.

Among them, the network device 100 may be a device capable of communicating with the terminal device 200. Network device 100 may be a base station, a relay station, an access point, or the like. The base station may be a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or may be an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or may be an eNB or enodeb (evolved nodeb) in LTE. The network device 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. Network device 100 may also be a network device in a future 5G network or a network device in a future evolved PLMN network; but also wearable devices or vehicle-mounted devices, etc.

Terminal apparatus 200 can be a UE, an access terminal, a UE unit, a UE station, a mobile station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device, etc. The access terminal may be a cellular phone, a cordless phone, a SIP (session initiation protocol) phone, a WLL (wireless local loop) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, etc. In this application, it is referred to as a terminal device or a terminal, or a UE.

In the present description, the network device 100 is a base station, and the terminal device 200 is a UE, for example. For downlink transmission, the sending device may be a base station, and the receiving device may be a terminal, and for uplink transmission, the sending device may be a terminal, and the receiving device may be a base station.

Taking the network device 100 as a base station as an example, a general hardware architecture of the base station will be described. As shown in fig. 4, the base station may include a building Base Band Unit (BBU) and a Remote Radio Unit (RRU), the RRU is connected to an antenna feed system (i.e., an antenna), and the BBU and the RRU may be detached for use as needed.

Taking the terminal device 200 as a mobile phone as an example, a general hardware architecture of the mobile phone will be described. As shown in fig. 5, the mobile phone may include: radio Frequency (RF) circuitry 110, memory 120, other input devices 130, a display screen 140, sensors 150, audio circuitry 160, an I/O subsystem 170, a processor 180, and a power supply 190. Those skilled in the art will appreciate that the configuration of the handset shown in fig. 5 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, some components may be separated, or a different arrangement of components. Those skilled in the art will appreciate that the display screen 140 belongs to a User Interface (UI), and the display screen 140 may include a display panel 141 and a touch panel 142. And the handset may include more or fewer components than shown. Although not shown, the mobile phone may further include a camera, a bluetooth module, and other functional modules or devices, which are not described herein again.

Further, processor 180 is coupled to RF circuitry 110, memory 120, audio circuitry 160, I/O subsystem 170, and power supply 190, respectively. The I/O subsystem 170 is coupled to the other input devices 130, the display screen 140, and the sensors 150, respectively. The RF circuit 110 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 180. The memory 120 may be used to store software programs and modules. The processor 180 executes various functional applications and data processing of the cellular phone by executing software programs and modules stored in the memory 120. Other input devices 130 may be used to receive entered numeric or character information and generate key signal inputs relating to user settings and function controls of the handset. The display screen 140 may be used to display information input by or provided to the user and various menus of the handset, and may also accept user input. The sensor 150 may be a light sensor, a motion sensor, or other sensor. Audio circuitry 160 may provide an audio interface between the user and the handset. The I/O subsystem 170 is used to control input and output peripherals, which may include other device input controllers, sensor controllers, and display controllers. The processor 180 is a control center of the mobile phone 200, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile phone 200 and processes data by operating or executing software programs and/or modules stored in the memory 120 and calling data stored in the memory 120, thereby performing overall monitoring of the mobile phone. A power supply 190 (e.g., a battery) is used to supply power to the above components, and preferably, the power supply may be logically connected to the processor 180 via a power management system, so that functions of managing charging, discharging, and power consumption are implemented via the power management system.

It should be noted that the technical solution provided in the present application may be particularly applicable to a 5G NR system. According to the discussion of 5G NR, in order to guarantee robustness of a control channel, PDCCH may be transmitted to one UE using a plurality of beams. The technical scheme provided by the application is particularly suitable for scenes based on a plurality of beams. There may be the following two typical scenarios for transmitting one PDCCH using multiple beams.

Scene 1: multiple beams can be used simultaneously for communication between the UE and the base station. As shown in fig. 6, the base station transmits a PDCCH to the UE using 1 control symbol (i.e., control symbol 0), and simultaneously transmits the PDCCH using 2 beams (i.e., beam 1 and beam 2).

Scene 2: the UE communicates with the base station using one beam at the same time. As shown in fig. 7, the base station transmits PDCCH to the UE using 2 control symbols (i.e., control symbol 0 and control symbol 1), and transmits 1 control symbol on each beam, i.e.: control symbol 0 is transmitted on beam 1 and control symbol 2 is transmitted on beam 2.

It should be understood that fig. 6 and fig. 7 are only examples, and do not limit the applicable scenarios of the technical solutions provided in the present application. For example, the base station may transmit the PDCCH on 3 or more control symbols.

For convenience of description, the information transmission method performed by the base station and the UE in the embodiment of the present application is shown in the form of steps and described in detail below.

Fig. 8 is a schematic flow chart of an information transmission method according to an embodiment of the present application. In fig. 8, the base station performs processing on the PDCCH transmitted on one beam, for example. The method may include the following steps S301 to S312:

s301 to S306: reference may be made to S101 to S106, and other methods may be adopted, which is not limited in the present invention.

S307: and the base station scrambles the bit sequence obtained after the resource multiplexing according to the identification of the wave beam.

The bit sequence obtained after resource multiplexing may be a bit sequence to be scrambled.

As shown in FIG. 9, S307 may include the following steps T1-T3:

t1: and the base station acquires the initialization factor of the scrambling sequence according to the beam indication information, the cell index and the time slot number.

Illustratively, according to a formula

Determining an initialization factor c of a scrambling sequence_init(ii) a Wherein the content of the first and second substances,

denotes rounding down, n_sTo representThe number of the time slot is,

denotes a cell index, and offset denotes a value associated with beam indication information. The cell index refers to a cell ID of a cell in which the UE is located, and the slot number refers to a slot number used when the PDCCH is transmitted.

T2: and the base station determines the scrambling sequence according to the initialization factor of the scrambling sequence.

T3: and the base station scrambles the bit sequence to be scrambled according to the scrambling sequence to obtain the scrambled bit sequence.

The embodiment of the present application does not limit the specific implementation process of T2 to T3.

It is understood that, in a specific implementation, the base station and the UE may agree in advance on the correlation between the offset and the beam indication information. Specific examples thereof can be referred to below.

It can be understood from S307 that the scrambling operation provided by the present application is related to beam indication information, each beam indication information is used for indicating one beam, and different beam indication information indicates different beams. Each beam may be indicated using one or more beam indication information, and different beams may be indicated using different beam indication information. The present application does not limit the specific implementation manner of the beam indication information, and several optional manners are listed below:

mode 1: the beam indication information is the relative number of the beam.

Assume that the relative number of the beam used by the base station to transmit the PDCCH to the UE is beam_idxWhere each number represents a physical beam, as shown in fig. 9a, then one possible correlation of offset to the relative number of beams is: offset equal to beam_idx. For example, as shown in fig. 9a, when the base station transmits a PDCCH to the UE using 2 beams in common, and the relative numbers of the 2 beams may be 0 and 1, respectively, the scrambling sequence corresponding to beam 0 may be acquired using offset equal to 0, and the scrambling sequence corresponding to beam 1 may be acquired using offset equal to 1.

Mode 2: the beam indication information is a logical number of the beam.

Assume that the logical number of the transmission beam of the base station is beam_idxWhere each number represents a physical beam, as shown in fig. 9b, then one possible way of correlating offset to the logical number of the beam is: offset equal to beam_idx. For example, as shown in fig. 9b, the transmission beam numbers of the base station are 0,1,2, and 3, respectively, and if the base station transmits a PDCCH to the UE using beam 1 and beam 2, the scrambling sequence corresponding to beam 1 may be acquired using offset of 1, and beam 2 may be indicated using the scrambling sequence corresponding to beam 2 using offset of 2.

Mode 3: the beam indication information is a physical number of the beam.

Assume that the physical number of the transmission beam of the base station is beam_idxWhere each number represents a physical beam, then one possible correlation of offset to the physical number of the beam is: offset equal to beam_idxmod N. Where N is a predefined or configurable integer. Assume that the base station uses 8 beams in total to serve the entire cell, as shown in fig. 9 c. Based on fig. 9c, if N is 2 and the base station transmits a PDCCH to the UE using beam 5 and beam 6, the scrambling sequence corresponding to beam 5 may be acquired using offset of 1, and the scrambling sequence corresponding to beam 6 may be acquired using offset of 0.

Mode 4: the beam indication information is a port number.

One beam may correspond to one or more port numbers. Therefore, a port number corresponding to one beam can be used to indicate the beam. Optionally, the port numbers corresponding to one beam may form a port group, and each port group may be assigned a logical number (port group ID). Based on this, assume beam_idxWhere each number represents a port group, then one possible correlation of offset to port number is: offset equal to beam_idxmod N. Where N is a predefined or configurable integer. For example, if N is 2 and the base station transmits a PDCCH to the UE using beam 2 and beam 3, the scrambling sequence corresponding to beam 2 may be acquired using offset 0 and the scrambling sequence corresponding to beam 3 may be acquired using offset 1.

Mode 5: the beam indication information is quasi co-located (QCL) information.

The quasi co-location is used for indicating that a plurality of resources have one or more same or similar communication characteristics, and for a plurality of resources with a co-location relationship, the same or similar communication configuration can be adopted. For example, if two antenna ports have a co-located relationship, the channel large scale characteristic of one port transmitting one symbol can be inferred from the channel large scale characteristic of the other port transmitting one symbol. Wherein the large scale characteristics may include: delay spread, average delay, doppler spread, doppler shift, average gain, terminal device received beam number, transmit/receive channel correlation, receive angle of arrival, spatial correlation of receiver antennas, etc.

Based on this, a beam on which the PDCCH is transmitted may be indicated using resources of other signals transmitted on the beam. Optionally, the signal may be a reference signal, such as a CSI-RS. Here, the "resource" may include, but is not limited to, at least one of the following information: time frequency resources, number of ports, periodicity, offset, etc.

It can be understood that, if the base station transmits the PDCCH to the UE using a certain beam, the base station has transmitted the CSI-RS using the beam. This is because, generally, the base station needs to send CSI-RS to the UE first to perform channel measurement; then, the PDCCH is transmitted to the UE using the channel measurement result. Based on this, the base station can know which beam or beams the base station uses to transmit the PDCCH as long as the base station notifies the UE of the port number and/or the resource number used by the CSI-RS.

As shown in fig. 9d, is a corresponding relationship between CSI-RS resources and beams.

Alternatively, the CSI-RS resource number may be resource ID, or resource ID + port ID (port ID). In this case, beam is assumed_idxWhere each number represents a CSI-RS resource, then one possible way of correlating offset to CSI-RS resources is: offset equal to beam_idxmod N, where N is a predefined or configurable integer.

For example, as shown in fig. 9d, if the CSI-RS resource numbers used when the base station transmits the CSI-RS to the UE are #0 and #1, and the PDCCH is transmitted to the UE using the beam transmitting the CSI-RS, and N is 2, the scrambling sequence of the beam corresponding to the CSI-RS resource number #0 may be acquired using offset 0, and the scrambling sequence of the beam corresponding to the CSI-RS resource number #1 may be acquired using offset 1.

Mode 6: the beam indication information is Beam Pair Link (BPL) information.

The BPL information may be a BPL number or the like. Suppose beam_idxWhere each number represents a BPL, as shown in fig. 9 e. Then, one possible way to correlate the offset with the BPL information is to get the offset to beam_idx. For example, as shown in fig. 9e, the base station transmits a PDCCH to the UE using beam pair 0 and beam pair 1, and then may acquire a scrambling sequence corresponding to beam 0 using offset of 0 and acquire a scrambling sequence corresponding to beam 1 using offset of 1.

Mode 7: the beam indication information is a UE group. The UEs within one beam coverage form one UE group, each UE group may include one or more UEs, and one UE may belong to one or more UE groups.

As shown in fig. 9f, beam 1 includes UE1 in UE group 1, beam 2 includes UE1 and UE2 in UE group 2, and beam 3 includes UE2 in UE group 3. In this case, beam is assumed_idxWhere each number refers to a UE group, then one possible way of correlating offset to UE groups is: offset equal to beam_idx. For example, as shown in fig. 9f, the base station may acquire the scrambling sequence corresponding to beam 1 with offset of 1, acquire the scrambling sequence corresponding to beam 2 with offset of 2, and acquire the scrambling sequence corresponding to beam 3 with offset of 3.

Mode 8: the beam indication information is a time domain symbol.

The time domain symbol refers to an OFDM symbol occupied when the beam is transmitted. The method is suitable for the base station to use a plurality of beams to send the PDCCH to the same UE on different symbols, and in the scene that each symbol only uses one beam to transmit the PDCCH to the UE. As shown in fig. 9g, the base station transmits a PDCCH to the UE using one beam at symbol 0 and transmits the PDCCH to the UE using another beam at symbol 1.

Suppose beam_idxWhere each number refers to a symbol time. One possible way of correlating the offset with the time domain symbols is then:

where N is a predefined or configurable integer, e.g., N-9.

It is to be understood that the above-listed manners are mostly described by taking the beam indication information as a single information, and in particular, the beam indication information may also be a combination of at least two of the above information, for example, one example of manner 5. Of course, not limited to the above-mentioned information. This application is not further enumerated.

It should be noted that, in the technical solution provided in the present application, beams are considered when the base station performs the scrambling operation, but the scrambling sequences corresponding to different beams are not limited to be different. That is, the scrambling sequences corresponding to different beams may be the same or different.

It can be understood that the beam for communication between the base station and the same UE may change with the movement of the UE, and the application does not limit the change rule of the used beam. In this case, therefore, the beam indication information is not a fixed value. Based on this, the base station may inform the UE of the beam indication information through signaling. The execution sequence of the steps in fig. 8 is not limited in the embodiment of the present application, and optionally, the steps may be executed before S301. It should be noted that the signaling for transmitting the beam indication information may be a newly designed signaling, or may be a signaling in the prior art.

Optionally, the base station may send the beam indication information to the UE through Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, or DCI. For example, the base station may send the beam indication information to the UE through RRC signaling or MAC signaling, which may be suitable for a scenario in which the beam changes slowly. The base station sends the beam indication information to the UE through the DCI, and can be applied to a scene with fast beam change.

S308 to S310: reference may be made to methods of S108 to S110 in the prior art, and other methods may also be adopted, which is not limited in the present invention.

S311: and the base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the frequency domain and the time domain.

The technical scheme provided by the embodiment of the application is particularly suitable for a scene based on transmission of a plurality of beams, and in the scene of transmission of the plurality of beams, the mapping rule can be a frequency domain first and a time domain later, so that the problem that in the scene that one beam occupies one symbol, UE in the beam direction cannot receive information transmitted on different beams due to the fact that the mapping rule of the time domain first and the frequency domain later is adopted can be avoided. It can be understood that, if a beam occupies a plurality of symbols, the information transmitted by using the beam may be mapped according to a mapping rule of first time domain and then frequency domain, or according to a mapping rule of first frequency domain and then time domain.

Taking one antenna port as an example, the resource mapping means will

Mapping to the port corresponding REG (k ', l'). Therein, relate to

Reference may be made to S111 above.

If multiple beams occupy one symbol, as shown in fig. 6, the resource mapping performed by the base station on the symbol sequences corresponding to the two beams may be: will be provided with

Mapping to REG (0,0), will

Mapping to REG (1,0), will

Mapping to REG (2,0), will

Maps to REG (3,0) … ….

If multiple beams occupy multiple symbols as shown in fig. 7, then the base station will be on symbol 0

Mapping to REG (0,0), will

Mapping to REG (1,0), will

Mapping to REG (2,0), will

Maps to REG (3,0) … …. On the symbol 1, will

Mapping to REG (0,1), will

Mapping to REG (1,1), will

Mapping to REG (2,1), will

Maps to REG (3,1) … ….

S312: step S112 may be referred to, and other methods may be adopted, which is not limited in the present invention.

S313: and the base station transmits the OFDM time domain signal to the UE through the beam indicated by the beam indication information.

It should be noted that some of the steps in S301 to S313 may be optional steps, and in the embodiment of the present application, the execution sequence of any two steps in S301 to S313 is not limited.

S301 to S313 are described as an example of a procedure of processing a PDCCH transmitted on one beam by the base station, and the base station may perform the procedure a plurality of times in a multi-beam scene.

In this embodiment, the base station considers the beam in the process of performing the scrambling operation, so that PDCCHs transmitted on different beams may be scrambled using different scrambling sequences, so that different beams may use different randomization techniques, thereby improving the randomization effect and reducing interference caused by the multi-beam base station to the neighboring cell.

Fig. 10 is a schematic flow chart of an information transmission method according to an embodiment of the present application. In fig. 10, the UE performs processing on the PDCCH transmitted on one beam, for example. The method may include the following steps S401 to S409:

s401: the UE monitors the PDCCH transmitted through the beam in subframe k. The signals that the UE hears (i.e., the signals that the UE receives) are radio signals carried in OFDM waveforms, i.e., OFDM time domain signals.

S402 to S404: steps S202 to S204 may be referred to, or other methods may be adopted, which is not limited in the present invention.

S405: the UE descrambles the bit sequence obtained after demodulation according to the beam indication information; wherein the beam indication information is used for indicating the beam in S401.

As shown in FIG. 11, S405 may include the following steps M1-M3:

m1: and the UE acquires the initialization factor of the scrambling sequence according to the beam indication information, the cell index and the time slot number.

M2: and the UE determines the scrambling sequence according to the initialization factor of the scrambling sequence.

M3: and the UE descrambles the scrambled bit sequence according to the scrambling sequence.

Wherein, M1 to M3 correspond to T1 to T3 in fig. 9, and specific implementation processes thereof may refer to the above, which are not described herein again. In addition, the related description of the beam indication information may also refer to the above.

In addition, the method may further include: the UE receives the beam indication information through RRC signaling, MAC signaling, or DCI. Wherein, the UE specifically receives the beam indication information through which signaling, and the base station transmits the beam indication information using which signaling. For example, if the base station transmits the beam indication information using RRC signaling, the UE receives the beam indication information using RRC signaling. Other examples are not listed.

S406 to S409: reference may be made to S206 to S209, and other methods may be adopted, which is not limited in the present invention.

It should be noted that some of the steps in S401 to S409 may be optional steps, and in addition, the execution sequence of any two steps in S401 to S409 is not limited in this embodiment of the application.

It can be understood that, if a plurality of beams occupy one symbol, as shown in fig. 6, the processing flow of the PDCCH corresponding to each beam may be all the above S401 to S409.

If multiple beams occupy multiple symbols, as shown in fig. 7, if the PDCCH monitored by the UE on the symbol occupied by the first beam is decoded correctly, the symbols occupied by the subsequent beams may not be monitored. If the PDCCH decoding obtained by monitoring the symbols occupied by the first beam is incorrect, performing S401 to S409 again, wherein in S401, the PDCCH is monitored on the second symbol; and repeating the steps until the PDCCH obtained by monitoring for a certain time is decoded correctly, or all PDCCHs are monitored and decoded incorrectly.

In this embodiment, the UE considers the beam in the process of performing the descrambling operation, and the descrambling process corresponds to the scrambling process in the embodiment shown in fig. 8, so that the explanation of the related content and the beneficial effect that can be achieved may refer to the corresponding parts in the embodiment shown in fig. 8, and are not described herein again.

It can be understood that, in the foregoing, the description is given by taking "a beam is considered when performing scrambling operation or descrambling in the process of transmitting a PDCCH", and in actual implementation, this is not limited in the embodiment of the present application, for example, the technical solution provided in the embodiment of the present application may also be applied to a scenario of transmitting any one of the following channels:

1) a Physical Downlink Shared Channel (PDSCH).

In this case, the initialization factor of the scrambling sequence

Wherein n is_RNTIIndicating a UE ID for identifying a UE, q indicating q codewords (codeword)

2) Physical Multicast Channel (PMCH).

In this case, the initialization factor of the scrambling sequence

Wherein the content of the first and second substances,

indicating a Multicast Broadcast Single Frequency Network (MBSFN) area identity.

3)PBCH。

In this case, the initialization factor of the scrambling sequence

4)PCFICH。

In this case, the initialization factor of the scrambling sequence

5) Enhanced Physical Downlink Control Channel (EPDCCH).

In this case, the initialization factor of the scrambling sequence

m represents the number of EPDCCH sets (or EPDCCH clusters),

one high-level configuration ID associated with EPDCCH setup is indicated.

6) A Physical Uplink Shared Channel (PUSCH).

In this case, the initialization factor of the scrambling sequence

7) A Physical Uplink Control Channel (PUCCH).

In this case, the initialization factor of the scrambling sequence

It is understood that the transmission methods of the several channels extended as described above, scrambling operations, etc. can be determined according to the prior art and the method for transmitting PDCCH provided herein, and will not be described herein.

Fig. 12 is a schematic flowchart of an information transmission method according to an embodiment of the present application. In fig. 12, the base station performs processing on the PDCCH transmitted on one beam, for example. The method may include the following steps S501 to S512:

s501 to S509: reference may be made to S101 to S109, and other methods may be adopted, which is not limited in the present invention.

S510: and the base station interweaves and circularly shifts the symbol sequence obtained after precoding according to the beam indication information.

Specifically, the base station interleaves the symbol sequence obtained after precoding, and then performs cyclic shift on the symbol sequence obtained after interleaving according to the beam indication information. Wherein, the step of the base station performing the interleaving is an optional step.

As shown in fig. 13, the base station performs cyclic shift according to the beam indication information, which may include the following steps N1:

n1: and the base station performs cyclic shift operation on the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.

Illustratively, the base station is based on a formula

Obtaining a second symbol group; wherein the content of the first and second substances,

denotes a cell index, and offset denotes beam indication information.

It can be understood that, if the base station does not perform the interleaving step, the first symbol group is a symbol sequence output after precoding. If the base station executes the step of interleaving, the first symbol group is a symbol sequence output after interleaving. The type and number of modulation symbols included in the first symbol group are both related to the modulation scheme.

For example, if the base station performs the cyclic shift operation in units of quadruplets, one quadruplet z (i) is taken as an antenna port<y(4i),y(4i+1),y(4i+2),y(4i+3)>. The quadruplet sequence may be represented as z (0), z (1), z (2), z (3) … …. Assuming that information obtained by an element z (i) in the quadruplet sequence after the interleaving operation is performed on the quadruplet sequence by the base station is denoted as w (i), the element in the first symbol group may be w (i), and the first symbol group may be: w (0), w (1), w (2), w (3) … …. The elements in the second symbol group may be

Optionally, the base station is according to formula

Wherein M is_quadIndicating the number of quadruplets.

It is to be understood that this example is described by taking the element in the first symbol group as an example of a quadruple group, and the present application is not limited thereto, and may be, for example, an N-tuple where N is any integer equal to or greater than 1.

It can be understood that, for specific implementation of the beam indication information, and a specific implementation manner for the base station to send the beam indication information to the UE, etc., reference may be made to the above, and details are not described here.

It should be noted that, in the technical solution provided in the present application, beams are considered when the base station performs the cyclic shift operation, but the present application does not limit that symbol sequences obtained after cyclic shifts corresponding to different beams are different. That is, the symbol sequences obtained after cyclic shift corresponding to different beams may be the same or different.

S511: and the base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the frequency domain and the time domain. For a specific implementation process of this step, reference may be made to S311, which is not described herein again.

S512: reference may be made to S112, and other methods may be adopted, which is not limited by the present invention.

S513: and the base station sends the information mapped to the time-frequency resource to the UE through the wave beam indicated by the wave beam indication information.

It should be noted that some of the steps in S501 to S513 may be optional steps, and in addition, the execution sequence of any two steps in S501 to S513 is not limited in this embodiment of the application.

It can be understood that if the PDCCH occupies only one symbol, as shown in fig. 6, the processing procedure of the base station for the PDCCH corresponding to each beam may be: s501 to S511 are independently performed. After S511 is executed, the PDCCHs corresponding to the two beams are both mapped to the time-frequency resource corresponding to the same symbol. Then, S512 is executed, that is: and performing IFFT on the information mapped to the time-frequency resource corresponding to the symbol. Finally, S513 is executed, that is: an OFDM time domain signal will be transmitted to the UE over the two beams over the symbol.

If the PDCCH occupies two symbols, as shown in fig. 7, then for two beams, the processing procedure of the base station for the PDCCH corresponding to each beam may be: s501 to S315 are independently executed.

For a scenario in which the PDCCH occupies three or more symbols, the processing procedure of the base station for the PDCCH corresponding to each beam may refer to the processing procedure of the base station for the PDCCH corresponding to each beam in the scenario in which the PDCCH occupies two symbols, and details are not repeated here.

In this embodiment, the base station considers the beam in the process of performing the cyclic shift operation, so that symbol sequences obtained after the cyclic shift of the PDCCHs transmitted on different beams may be different, so that the PDCCHs transmitted on different beams may use different randomization techniques, thereby improving the randomization effect and reducing interference caused by the multi-beam base station to the neighboring cell. Optionally, because the technical scheme may implement that scrambling sequences corresponding to any multiple beams are different, the problem of self-interference among the multiple beams caused in a scenario in which the base station uses the multiple beams to simultaneously send the PDCCH to the same UE may be solved. In addition, the problem that the plurality of beams are not fully utilized in a scene that the base station uses the plurality of beams to sequentially transmit the PDCCH to the same UE can be solved.

It is understood that S507 may be replaced by S307 in actual implementation. That is, the base station considers the beam in performing both the scrambling operation and the cyclic shift operation. Therefore, the technical problems brought by the technical scheme provided in the LTE system can be better solved.

Fig. 14 is a schematic flow chart of an information transmission method according to an embodiment of the present application. Fig. 14 illustrates an example in which a UE processes a PDCCH transmitted on one beam. The method may include the following steps S601 to S609:

s601: reference may be made to S401, and other methods may be adopted, which is not limited in the present invention.

S602: reference may be made to S202, and other methods may be adopted, which is not limited in the present invention.

S603: and the UE performs de-interleaving and cyclic shift reverse operation on the symbol sequence obtained after the FFT according to the beam indication information.

Specifically, the UE deinterleaves the symbol sequence obtained after the FFT, and then performs cyclic shift inversion operation on the symbol sequence obtained after the deinterleaving according to the beam indication information. The step of the UE performing the deinterleaving is an optional step, and whether to perform the step is related to whether the base station performs the interleaving. For example, if the base station performs the interleaving procedure, the UE needs to perform the deinterleaving procedure.

As shown in fig. 15, the UE performs a cyclic shift reverse operation according to the beam indication information, which may include the following step W1:

w1: and the UE performs cyclic shift operation on the second symbol group according to the beam indication information and the cell index to obtain a first symbol group.

W1 corresponds to N1 in fig. 13, and the specific implementation process thereof can be referred to above, which is not described herein again. In addition, the related description of the beam indication information may also refer to the above. Illustratively, the UE is based on a formula

denotes the ith symbol in the second symbol group, w (i) denotes the ith symbol in the first symbol group,

denotes a cell index, and offset denotes beam indication information. The specific implementation process may refer to step N1 described above.

It is to be understood that if the UE does not perform the step of deinterleaving, the second symbol group is a symbol sequence output after FFT. If the UE performs the step of deinterleaving, the second symbol group is a symbol sequence output after deinterleaving.

In addition, the method may further include: the UE receives the beam indication information through RRC signaling, MAC signaling, or DCI. Wherein, the specific signaling receiving beam indication information relates to the base station transmitting beam indication information by using the signaling. For example, if the base station transmits the beam indication information using RRC signaling, the UE receives the beam indication information using RRC signaling. Other examples are not listed.

S604 to S609: reference may be made to S204 to S209, and other methods may be adopted, which is not limited in the present invention.

It should be noted that some of the steps in S601 to S609 may be optional steps, and in addition, the execution sequence of any two steps in S601 to S609 is not limited in this embodiment of the application.

In this embodiment, the UE considers beams in the process of performing the reverse operation of the cyclic shift, and the process of the reverse operation of the cyclic shift corresponds to the process of the cyclic shift in the embodiment shown in fig. 12, so that the beneficial effects achieved by the reverse operation of the cyclic shift may refer to the embodiment shown in fig. 12, and are not described herein again.

It is understood that if S507 is replaced by S307, S605 in the present embodiment may be replaced by S405. For the beneficial effects that can be achieved, reference is made to the above description, which is not repeated herein.

It can be understood that fig. 13 and fig. 14 are described by taking an example of "beam is considered when performing a cyclic shift operation or a cyclic shift reverse operation in the process of transmitting a PDCCH", and in actual implementation, this is not limited in the embodiment of the present application, for example, the technical solution provided in the embodiment of the present application may also be applied to a scene of transmitting a PUCCH, for example, when transmitting format 3 of the PUCCH,

wherein the content of the first and second substances,

represents a symbol sequence to be cyclically shifted,

denotes the symbol sequence obtained after cyclic shift, n_sThe number of slots is indicated and is,

denotes the number of subcarriers of one Resource Block (RB).

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element is, for example, a network device (e.g., a base station) or a terminal device (e.g., a UE). To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the network device or the terminal device may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The following description will be given by taking the division of each function module corresponding to each function as an example:

fig. 16 shows a schematic configuration of an information transmission device 160. The information transmission device 160 may be the network device 100 referred to above, such as a base station. The information transmission apparatus 160 may include a scrambling unit 1601, a mapping unit 1602, and a transmitting unit 1603. Among other things, scrambling unit 1601 may be used to perform S307 in fig. 8, steps in fig. 9, and/or other processes for supporting the techniques described herein. Mapping unit 1602 may be used to perform S311 in fig. 8, and/or other processes for supporting the techniques described herein. Sending unit 1603 may be used to perform S311 in fig. 8, and/or other processes for supporting the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 17 shows a schematic configuration of an information transmission device 170. The information transmission apparatus 170 may be the terminal device 200 referred to above, such as a UE. The information transmission apparatus 170 may include a reception unit 1701, an acquisition unit 1702, and a descrambling unit 1703. Among other things, the receiving unit 1701 may be used to perform S401 in fig. 10, the steps in fig. 11, and/or other processes for supporting the techniques described herein. Acquisition unit 1702 may be used to perform S402 in fig. 10, and/or other processes for supporting the techniques described herein. Descrambling unit 1703 may be used to perform S405 in fig. 10, and/or other processes to support the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 18 shows a schematic configuration of an information transmission device 180. The information transmission device 180 may be the network device 100 referred to above, such as a base station. The information transmission device 180 may include: cyclic shift unit 1801, mapping unit 1802, and transmission unit 1803. Among other things, cyclic shift unit 1801 may be used to perform S510 in fig. 12, N1 in fig. 13, and/or other processes to support the techniques described herein. Mapping unit 1802 may be used to perform S511 in fig. 12, and/or other processes for supporting the techniques described herein. The sending unit 1803 may be used to perform S513 in fig. 12, and/or other processes to support the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 19 shows a schematic configuration of an information transmission device 190. The information transmission device 190 may be the terminal apparatus 200 referred to above, e.g., a UE. The information transmission device 190 may include: a receiving unit 1901, an acquiring unit 1902, and a cyclic shift inverse operation unit 1903. Among other things, the receiving unit 1901 may be used to perform S601 in fig. 14, and/or other processes for supporting the techniques described herein. Acquisition unit 1902 may be used to perform S602 in fig. 14, and/or other processes for supporting the techniques described herein. Cyclic shift inverse operation unit 1903 may be used to perform S603 in fig. 14, and/or other processes to support the techniques described herein. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the embodiment of the present application, the information transmission devices 160 to 190 are presented in a form of dividing each function module corresponding to each function, or in a form of dividing each function module in an integrated manner. A "module" may refer to an application-specific integrated circuit (ASIC), a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that provide the described functionality, wherein the processor and memory may be integrated or otherwise relatively independent.

In a simple embodiment, one skilled in the art can think of any one of the information transmission devices 160-190 being implemented by a structure as shown in FIG. 20.

As shown in fig. 20, the information transmission device 210 may include: a memory 2101, a processor 2102, and a communication interface 2103. Wherein the memory 2102 is configured to store computer executable instructions, and when the information transmission apparatus 210 runs, the processor 2101 executes the computer executable instructions stored in the memory 2102, so as to cause the information transmission apparatus 210 to execute the information transmission method provided by the embodiments of the present application. For a specific information transmission method, reference may be made to the above description and the related description in the drawings, which are not repeated herein. Among others, communication interface 2103 may be a transceiver.

In one example, sending unit 1603 may correspond to communication interface 2103 in fig. 20. The scrambling unit 1601 and the mapping unit 1602 may be embedded in hardware or may be independent of the memory 2101 of the information transmission apparatus 210.

In another example, the receiving unit 1701 may correspond to the communication interface 2103 in fig. 20. The acquisition unit 1702 and the descrambling unit 1703 may be embedded in hardware or may be independent of the memory 2101 of the information transmission apparatus 210.

In another example, the sending unit 1803 may correspond to the communication interface 2103 in fig. 20. The cyclic shift unit 1801 and the mapping unit 1802 may be embedded in hardware or may be separate from the memory 2101 of the information transmission apparatus 210.

In another example, the receiving unit 1901 may correspond to the communication interface 2103 in fig. 20. The acquisition unit 1902 and the cyclic shift inverse operation unit 1903 may be embedded in hardware or may be independent of the memory 2101 of the information transmission apparatus 210.

Optionally, the information transmission device 210 may be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), or a Programmable Logic Device (PLD) or other integrated chips.

Embodiments of the present application also provide a storage medium, which may include memory 1602 or memory 1702 or memory 1802 or memory 1902.

Since the information transmission apparatus provided in the embodiment of the present application can be used to execute the information transmission method, the technical effect obtained by the information transmission apparatus can refer to the method embodiment described above, and the details of the embodiment of the present application are not repeated herein.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. An information transmission method, characterized in that the method comprises:

acquiring a scrambled bit sequence according to the beam indication information;

modulating the scrambled bit sequence and mapping the modulated bit sequence to a time frequency resource;

sending the scrambled bit sequence mapped to the time-frequency resource to terminal equipment through the wave beam indicated by the wave beam indication information;

wherein the method further comprises:

and transmitting the beam indication information to the terminal equipment through Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or Downlink Control Information (DCI).

2. The method of claim 1, wherein the obtaining the scrambled bit sequence according to the beam indication information comprises:

3. The method of claim 2, wherein obtaining the initialization factor of the scrambling sequence according to the beam indication information comprises:

4. The method of claim 3, wherein obtaining the initialization factor of the scrambling sequence according to the beam indication information, the cell index and the slot number comprises:

according to the formula

denotes rounding down, n_sWhich indicates the number of the time slot,

5. An information transmission method, characterized in that the method comprises: receiving a signal which is sent by a wave beam from a base station, demodulating the signal and acquiring a bit sequence;

descrambling the bit sequence according to the beam indication information associated with the beam;

wherein the method further comprises:

and receiving the beam indication information through Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling or Downlink Control Information (DCI).

6. The method of claim 5, wherein the descrambling the bit sequence according to the beam indication information comprises:

and descrambling the bit sequence according to the scrambling sequence.

7. The method of claim 6, wherein obtaining an initialization factor of a scrambling sequence according to the beam indication information comprises:

8. The method of claim 7, wherein obtaining an initialization factor of a scrambling sequence according to the beam indication information, the cell index and the slot number comprises:

according to the formula

denotes rounding down, n_sWhich indicates the number of the time slot,

9. An information transmission method, characterized in that the method comprises:

according to the beam indication information, carrying out cyclic shift on the first symbol group to obtain a second symbol group; the first symbol group is a symbol group obtained by modulating original data bits;

mapping the second symbol group to time frequency resources;

sending the second symbol group mapped to the time-frequency resource to the terminal equipment through the wave beam indicated by the wave beam indication information;

wherein the method further comprises:

10. The method of claim 9, wherein the first symbol group is cyclically shifted according to the beam indication to obtain a second symbol group;

and according to the beam indication information and the cell index, performing cyclic shift on the first symbol group to obtain a second symbol group.

11. The method of claim 10, wherein the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain a second symbol group comprises:

according to the formula

representing the ith element in the second symbol set,

12. An information transmission method, characterized in that the method comprises:

receiving a second symbol group which is sent by the wave beam and mapped to the time frequency resource; the second symbol group is a symbol group obtained by cyclically shifting a first symbol group according to beam indication information, the first symbol group is a symbol group obtained by modulating original data bits, and the beam indication information is used for indicating the beam;

acquiring the second symbol group from the time-frequency resource;

according to the beam indication information, performing cyclic shift inverse operation on the second symbol group to obtain the first symbol group;

wherein the method further comprises:

13. The method of claim 12, wherein performing a cyclic shift inversion operation on the second symbol group according to the beam indication information to obtain the first symbol group comprises:

and performing cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index to obtain the first symbol group.

14. The method of claim 13, wherein performing a cyclic shift inversion operation on the second symbol group according to the beam indication information and a cell index to obtain the first symbol group comprises:

according to the formula

represents the ith element in the second symbol group, w (i) represents the ith element in the first symbol group,

15. An information transmission method, characterized in that the method comprises the features of any of the claims 1 to 14, and that the beam indication information comprises at least one of the following information: the relative number of the wave beam, the logic number of the wave beam, the physical number of the wave beam, the port number, the quasi co-location QCL information, the connection information of the wave beam pair, the terminal equipment group and the time domain symbol corresponding to the wave beam; and the terminal equipment corresponding to each beam is a terminal equipment group.

16. An information transmission apparatus for carrying out the method of any one of claims 1 to 15.

17. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 15.