CN108282291B

CN108282291B - DCI transmission method, UE and network side equipment

Info

Publication number: CN108282291B
Application number: CN201710010099.7A
Authority: CN
Inventors: 王磊; 艾托尼; 潘学明
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-01-06
Filing date: 2017-01-06
Publication date: 2020-09-22
Anticipated expiration: 2037-01-06
Also published as: WO2018127241A1; CN108282291A

Abstract

The invention provides a DCI transmission method, UE and network side equipment, and the method can comprise the following steps: the UE receives and analyzes first part of control information included in the DCI through a blind detection PDCCH, wherein the first part of control information comprises a fixed information field, and the information field comprises receiving information of second part of control information included in the DCI; and the UE receives and analyzes the second part of control information according to the received information. The embodiment of the invention can reduce the complexity of blind detection of DCI received by the UE and reduce the power consumption of the UE.

Description

DCI transmission method, UE and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a Downlink Control Information (DCI) transmission method, a User Equipment (UE), and a network device.

Background

In a Long Term Evolution (LTE) system, different transmission modes and different transmission directions all have different Downlink Control Information (DCI) formats (formats). In addition, in order to adapt to different channel conditions, different Aggregation Levels (AL) are introduced. The UE needs to use all Physical Downlink Control Channel (PDCCH) candidate (candidate) resources in different AL blind Search spaces according to a desired DCI format in a Common Search Space (CSS) or a user-specific Search Space (USS). However, in future wireless communication systems, the types of services and scenarios that need to be supported are more diverse.

In order to ensure the diversity of transmission modes, transmission scenarios and traffic types, and considering forward compatibility, the DCI formats that the UE needs to support may be more diverse. Because in the current communication system, the UE needs to try blind detection on a plurality of different ALs according to a plurality of possible dciformates, and different dciformates are applied to different transmission modes or service types, the blind detection complexity of the UE is very high, and the power consumption of the terminal is very high. For example, for a UE supporting TM4, it needs to perform blind detection at least according to DCI format 0, DCI format1A, and DCI format 2. If the UE notifies that Uplink Multiple-Input Multiple-Output (UL MIMO) is supported, blind test is also performed according to DCIformat 4. For example: within the USS, a total of 16 candidates are supported for 4 ALs. The UE theoretically needs to blind check 32 or 48 times within the USS. It can be seen that, at present, the complexity of blind detection for receiving DCI by the UE is very high, and the power consumption of the UE is very high.

Disclosure of Invention

The invention aims to provide a DCI transmission method, UE and network side equipment, so as to solve the problems that the complexity of blind detection for receiving DCI by the UE is very high and the power consumption of the UE is very high.

In order to achieve the above object, an embodiment of the present invention provides a downlink control information transmission method, including:

the UE receives and analyzes first part of control information included in the DCI through a blind detection PDCCH, wherein the first part of control information comprises a fixed information field, and the information field comprises receiving information of second part of control information included in the DCI;

and the UE receives and analyzes the second part of control information according to the received information.

Optionally, the receiving and analyzing, by the UE through the blind detection PDCCH, the first part of control information included in the DCI includes:

and the UE receives and analyzes the first part of control information included in the DCI by blindly detecting the PDCCH on the PDCCH candidate resource in the search space of the UE.

Optionally, the user terminal parses the AL of the PDCCH independently from the first part of control information.

Optionally, the first part of control information includes an information field of which a fixed information field is a fixed information type.

Optionally, the format of the second part of control information corresponds to at least one of:

the service type scheduled by the network side equipment, the transmission mode scheduled by the network side equipment or the terminal type scheduled by the network side equipment.

Optionally, the receiving information includes at least one of:

the format information of the second part of control information, the AL information of the PDCCH and the number of resources occupied by the second part of control information.

Optionally, the receiving and analyzing, by the UE, the second part of control information according to the received information includes:

if the received information comprises format information of the second part of control information, the UE receives the second part of control information and tries to analyze the second part of control information according to different AL according to the format information; or

If the received information includes format information of the second part of control information and AL information of the PDCCH, the user terminal receives the second part of control information and analyzes the second part of control information according to the format information and the AL information of the PDCCH, wherein the AL information includes AL of the PDCCH, or the AL information indicates that the AL of the PDCCH is the AL used by the user terminal to perform blind detection on the first part of control information currently; or

And if the received information comprises the format of the second part of control information and the number of resources occupied by the second part of control information, the user terminal receives the second part of control information and analyzes the second part of control information according to the format information and the number of resources occupied by the second part of control information.

Optionally, the first part of Control information and the second part of Control information are mapped on a same group of consecutive Control Channel Elements (CCEs);

the UE receives and analyzes the second part of control information according to the received information, including:

and the UE receives and analyzes the second part of control information according to the received information on the continuous CCE receiving the first part of control information.

Optionally, the received information includes format information of the second part of control information, and further includes at least one of the following:

mapping resource position information of the second part of control information and the number of resources occupied by the second part of control information;

the receiving and analyzing of the second part of control information by the user terminal according to the received information includes:

if the received information includes mapping resource location information of the second part of control information and format information of the second part of control information, the user terminal receives the second part of control information at a resource location indicated by the mapping resource location information and tries to analyze the second part of control information according to different AL according to the format information; or

If the received information includes the mapping resource position information of the second part of control information, the format of the second part of control information and the number of resources occupied by the second part of control information, the user terminal receives the second part of control information at the resource position indicated by the mapping resource position information and analyzes the second part of control information according to the format information and the number of resources occupied by the second part of control information.

The embodiment of the invention also provides a downlink control information transmission method, which comprises the following steps:

the network side equipment maps a first part of control information and a second part of control information of the DCI to the same PDCCH for transmission, wherein the first part of control information comprises a fixed information field, and the information field comprises receiving information of the second part of control information included in the DCI.

Optionally, the receiving information includes at least one of:

Optionally, the first part of control information and the second part of control information are transmitted using different transmission blocks, and after the first part of control information and the second part of control information are channel coded, information bits are concatenated.

Optionally, the first partial control information and the second partial control information are mapped on the same group of consecutive CCEs.

Optionally, the mapping resource location of the second part of control information is notified by the first part of control information, and the receiving information includes format information of the second part of control information, and further includes at least one of:

and mapping resource position information of the second part of control information and the number of resources occupied by the second part of control information.

An embodiment of the present invention further provides a UE, including:

a blind detection module, configured to receive and analyze a first part of control information included in DCI through a blind detection PDCCH, where the first part of control information includes a fixed information field, and the information field includes reception information of a second part of control information included in the DCI;

and the receiving and analyzing module is used for receiving and analyzing the second part of control information according to the received information.

Optionally, the blind detection module is configured to receive and analyze the first part of control information included in the DCI by blind detecting the PDCCH on a PDCCH candidate resource in the search space of the blind detection module.

Optionally, the receiving information includes at least one of:

Optionally, the receiving and analyzing module is configured to receive a second part of the control information and attempt to analyze the second part of the control information according to different AL according to the format information if the received information includes the format of the second part of the control information; or

The receiving and analyzing module is configured to receive a second part of control information and analyze the second part of control information according to AL information of the PDCCH if the received information includes format information of the second part of control information and the AL information of the PDCCH, where the AL information includes AL of the PDCCH, or the AL information indicates that the AL of the PDCCH is an AL used by the user terminal to perform blind detection on the first part of control information currently; or

And the receiving and analyzing module is used for receiving the second part of control information and analyzing the second part of control information according to the format information and the number of the resources occupied by the second part of control information if the received information comprises the format of the second part of control information and the number of the resources occupied by the second part of control information.

Optionally, the first part of control information and the second part of control information are mapped on the same group of consecutive CCEs;

and the receiving and analyzing module is used for receiving and analyzing the second part of control information on the continuous CCE receiving the first part of control information according to the received information.

the receiving and analyzing module is configured to receive a second part of control information and attempt to analyze the second part of control information according to different AL according to format information at a resource location indicated by the mapping resource location information if the received information includes mapping resource location information of the second part of control information and format information of the second part of control information; or

The receiving and analyzing module is configured to receive a second part of control information and analyze the second part of control information according to the number of resources occupied by the second part of control information according to the format information at a resource position indicated by the mapped resource position information if the received information includes the mapped resource position information of the second part of control information, the format of the second part of control information, and the number of resources occupied by the second part of control information.

An embodiment of the present invention further provides a network side device, including:

a transmission module, configured to map a first part of control information and a second part of control information of the DCI onto the same downlink control channel for transmission, where the first part of control information includes a fixed information field, and the information field includes reception information of the second part of control information included in the DCI.

Optionally, the receiving information includes at least one of:

The technical scheme of the invention at least has the following beneficial effects:

in the embodiment of the invention, UE receives and analyzes the first part of control information included in DCI through a blind detection PDCCH, wherein the first part of control information comprises a fixed information domain, and the information domain comprises the receiving information of the second part of control information included in the DCI; and the UE receives and analyzes the second part of control information according to the received information. Because the first part of control information comprises the fixed information domain, the UE does not need to perform blind detection according to a plurality of DCI formats, and the second part of control information can be analyzed by using the receiving information included in the first part of control information, so that the number of times of blind detection of the UE can be reduced, and the purposes of reducing the complexity of blind detection of the UE for receiving the DCI and reducing the power consumption of the UE are achieved.

Drawings

Fig. 1 is a schematic diagram of a network structure according to an embodiment of the present invention;

fig. 2 is a flowchart of a downlink control information transmission method according to an embodiment of the present invention;

fig. 3 is a structural diagram of downlink control information transmission according to an embodiment of the present invention;

fig. 4 is a structural diagram of another downlink control information transmission provided in the embodiment of the present invention;

fig. 5 is a structural diagram of another downlink control information transmission provided in an embodiment of the present invention;

fig. 6 is a structural diagram of another downlink control information transmission provided in the embodiment of the present invention;

fig. 7 is a structural diagram of another downlink control information transmission provided in an embodiment of the present invention;

fig. 8 is a structural diagram of another downlink control information transmission provided in the embodiment of the present invention;

fig. 9 is a structural diagram of another downlink control information transmission provided in the embodiment of the present invention;

fig. 10 is a flowchart of another downlink control information transmission method according to an embodiment of the present invention;

fig. 11 is a structural diagram of a UE according to an embodiment of the present invention;

fig. 12 is a structural diagram of a network-side device according to an embodiment of the present invention;

fig. 13 is a block diagram of another UE according to an embodiment of the present invention;

fig. 14 is a block diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic diagram of a network structure provided by an embodiment of the present invention, as shown in fig. 1, including a UE11 and a network Device 12, where the UE11 may be a terminal-side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a specific type of the UE11 is not limited in the embodiment of the present invention. The UE11 may establish communication with the network device 12, where the network in the figure may represent the UE11 wirelessly establishing communication with the network device 12, and the network device 12 may be a base station, where the base station may be a macro station, such as an LTE eNB, a 5G NR NB, or a gNB; or a small station, such as a Low Power Node (LPN) pico, a femto, or an Access Point (AP); the network device 12 may also be a Central Unit (CU) or may be a Transmission Reception Point (TRP) managed and controlled by the CU. In addition, one or more cells (e.g., different frequency bins or sector splits) may be located under one network device 12. It should be noted that the specific type of the network device 12 is not limited in the embodiment of the present invention.

Referring to fig. 2, an embodiment of the present invention provides a method for transmitting downlink control information, as shown in fig. 2, including the following steps:

201. the UE receives and analyzes first part of control information included in the DCI through a blind detection PDCCH, wherein the first part of control information comprises a fixed information field, and the information field comprises receiving information of second part of control information included in the DCI;

202. and the UE receives and analyzes the second part of control information according to the received information.

In step 201, the UE may use different AL blind test PDCCHs, and since the information field of the first part of control information is fixed, the UE can always analyze the first part of control information no matter which AL the first part of control information is. And because the information field of the first part of control information is fixed, that is, the information field included in the first part of control information is irrelevant to the transmission mode of the UE and the service type of the UE, the UE does not need to perform blind detection according to multiple formats, and can analyze the second part of control information by using the received information included in the first part of control information, thereby reducing the blind detection times of the UE.

In addition, the received information may be related information for the UE to receive and analyze the second part of control information, for example: format of the second part of control information, AL of PDCCH, or: resource information occupied by the second part of control information, and the like.

After the UE analyzes the first part of the control information, the received information may be obtained, so that the second part of the control information may be received and analyzed by using the received information without performing blind check again.

In addition, in the embodiment of the present invention, content included in the second part of control information is not limited, and content included in the second part of control information may be any content that needs to be sent to the UE by the network side device.

In the embodiment of the present invention, through the above steps, it can be realized that one DCI includes two independent parts, that is, a first part of control information and a second part of control information, and the UE blindly detects the downlink control channel in its search space, and first analyzes the first part of control information, and knows how to receive the second part of control information according to the first part of control information, so as to achieve the purposes of reducing the complexity of blindness detection for receiving DCI by the UE and reducing the power consumption of the UE.

Optionally, in this embodiment of the present invention, the receiving and analyzing, by the UE through the blind detection PDCCH, the first part of control information included in the DCI includes:

The search space may be a USS or a CSS, the PDCCH candidate resource may be multiple candidate resources in the search space, and resource positions of the multiple candidate resources may be predefined or configured or determined in other manners, and the UE side and the network side have resource positions that are uniformly understood, so that the UE does not need to perform blind detection on excessive resource positions, and the number of blind detections is further reduced.

And the UE may perform blind detection on the PDCCH candidate resources in the search space by using the PDCCH, that is, the UE sequentially performs blind detection on the PDCCH candidate resources in the search space until the blind detection on all PDCCH candidate resources is completed, or until the UE successfully receives the first part of control information, or receives all DCI that the UE needs to receive.

Optionally, in this embodiment of the present invention, the ue parses the AL of the PDCCH independently from the first part of control information.

In this embodiment, the user equipment parsing the AL of the first part of the control information independent of the PDCCH may be understood that the UE parsing the first part of the control information does not need to know the AL actually used by the PDCCH, so that signaling interaction between the UE and the network side may be reduced, and signaling overhead may be saved.

Optionally, in this embodiment of the present invention, the first part of control information includes an information field of which a fixed information field is a fixed information type.

Here, the information field of the fixed information type may be understood as that the first part of the control information includes an information type, and the included information field is independent of a transmission mode, a service type, and the like of the UE. Since the information field of the first part of control information is the information field of the fixed information type, the UE does not need to perform blind detection according to multiple formats, so as to reduce the number of blind detections. In addition, here, the fixed information type may be known in advance by the UE, for example: the UE and the network side device negotiate in advance, or the network side configures the UE, that is, the UE knows the information type of the information field of the first part of the control information in advance, so that the UE can directly perform corresponding blind detection according to the information type, and can analyze the received information.

It should be noted that, in the embodiment of the present invention, it is not limited that the first part of the control information includes a fixed information field, which is a fixed information type, for example: other forms of immobilization are also possible, for example: and the UE and the network side equipment pre-agree with other fixed-form information domains.

Optionally, in this embodiment of the present invention, the format of the second part of the control information corresponds to at least one of the following items:

In this embodiment, the second part of control information may be divided into different formats according to the transmission mode, the service type, or the terminal type of the UE scheduled by the network side, and the information fields of the second part of control information of different formats are different, so as to adapt to different transmission modes, service types, or terminal types, and meet the service requirements of the UE. The corresponding relationship between the service type and the format, the corresponding relationship between the transmission mode and the format, and the corresponding relationship between the terminal type and the format may be configured by the network side device or defined by the protocol, which is not described in detail herein.

Optionally, in this embodiment of the present invention, the received information includes at least one of the following:

The format information is used for indicating a format of second partial control information, and the AL information of the PDCCH is used for indicating an AL of the PDCCH, that is, the UE can determine the AL of the PDCCH by using the AL information, and then analyze the second partial control information by using the corresponding AL.

In this embodiment, the received information may include at least one of format information and AL information of the second part of control information, and the number of resources occupied by the second part of control information, so that the number of blind detections of the UE may be reduced, and the resource overhead of the first part of control information may be saved.

and if the received information comprises format information of the second part of control information, the UE receives the second part of control information and tries to analyze the second part of control information according to different AL according to the format information.

The receiving the second part of control information and attempting to analyze the second part of control information according to different els according to the format information may be that the UE receives the second part of control information on a resource where the first part of control information is continuous, and attempts to analyze the second part of control information according to different els according to the format information. For example: the information bits of the first part of control information and the second part of control information are concatenated, that is, the first part of control information and the second part of control information are transmitted on continuous resources, so that the UE can naturally receive the second part of control information when receiving the first part of control information. Or determining the format of the second part of control information according to the format information of the second part of control information, and determining the resource location of the second part of control information according to the format of the second part of control information, for example: the UE may obtain a corresponding relationship between the formats and the resource locations in advance, that is, the UE may receive the corresponding second part of the control information at the corresponding resource location by using the corresponding relationship with the second part of the control information of each format. The above correspondence may be pre-negotiated between the UE and the network side device, pre-configured to the UE by the network side device, or defined by a protocol, and the like, which is not limited in this embodiment of the present invention. In this embodiment, since the received information only needs to include the format of the second part of control information, the resource overhead of the first part of control information may be saved. In addition, in the embodiment of the present invention, because the format of the second part of control information included in the first part of control information is included, even if a new DCI format needs to be introduced into a future wireless mobile system, the number of blind detections will not be increased, so that the forward compatibility of a downlink control channel can be ensured.

For example: it is assumed that downlink control information carried on one downlink control channel includes two parts, i.e., a first part of control information and a second part of control information. The first part of control information comprises format information of the second part of control information. The first part of control information may also contain information bits (bits) of other fixed content. Suppose that the AL supported by the downlink control channel of the terminal is 1, 2, 4, and 8, and the search space includes 16 control channel elements, which are referred to as CCEs in this embodiment. Suppose that the downlink control channel with AL of 1 has 6 candidate resources in the search space, the downlink control channel with AL of 2 has 6 candidate resources in the search space, the downlink control channel with AL of 4 has 2 candidate resources in the search space, and the downlink control channel with AL of 8 has 2 candidate resources in the search space. It is assumed that the information bit contained in the first part of control information is small enough to be transmitted within one CCE. Fig. 3 is a schematic diagram, in which the position of the bold solid line and white background is the possible position of the candidate resource of the downlink control channel, and the black background is the position of the first part of the control information transmission in the candidate resource of the blind detection. Of course, fig. 3 is only a schematic diagram and does not represent an actual resource mapping. As can be seen from fig. 3, the UE needs to blindly detect 2+2+6+ 16 candidate resource locations in the search space, that is, two candidate resource locations are blindly detected when AL is 8, 2 candidate resource locations are blindly detected when AL is 4, and 6 candidate resource locations are blindly detected when AL is 2 and 1, respectively. No matter how many AL are used for blind detection of the downlink control channel, the UE can always analyze the first part of control information firstly. After the UE parses the first control information, the format of the second control information is obtained, and further how to parse the information field of the second control information is obtained. In summary, the UE only needs to search 16 candidate resource locations in the search space according to different AL blind detections, and since the first part of the control information includes the format of the second control information, the UE can receive all the DCI that the UE needs to receive through 16 blind detections at most. Even if a new DCI format needs to be introduced into a future wireless mobile system, the blind detection times are not increased. Of course, the resource distribution of the search space (search space) in the schematic diagram of the present embodiment is only an example. The embodiment does not exclude that the method provided by the embodiment of the present invention can be applied to other structures of the search space, such as the structure of the search space shown in fig. 4, and can achieve the same beneficial effects.

Another example is: it is assumed that downlink control information carried on one downlink control channel includes two parts, i.e., a first part of control information and a second part of control information. The first part of control information comprises format information of the second part of control information. The first part of control information may also contain information bit of other fixed contents. It is assumed that the first part of control information is transmitted within fixed N CCEs, N being a positive integer greater than or equal to 1. In this embodiment, N is assumed to be 1. Suppose that the AL supported by the downlink control channel of the terminal is 2, 4, and 8, and the search space includes 16 control channel elements, which are referred to as CCEs in this embodiment. Suppose there are 6 candidate resources in the search space of the downlink control channel with AL of 2, 2 candidate resources in the search space of the downlink control channel with AL of 4, and 2 candidate resources in the search space of the downlink control channel with AL of 8. Fig. 5 shows a schematic diagram, in which the position of the bold solid line and white background is the possible position of the candidate resource of the downlink control channel, and the black background is the position of the first part of the control information transmission in the candidate resource of the blind detection. Of course, fig. 5 is only a schematic diagram and does not represent an actual resource mapping. As shown in fig. 5, the UE needs to blindly detect 2+2+ 6-10 candidate resource locations in the search space, that is, two candidate resource locations are blindly detected when AL is 8, 2 candidate resource locations are blindly detected when AL is 4, and 6 candidate resource locations are blindly detected when AL is 2. No matter how many AL are used for blind detection of the downlink control channel, the UE can always analyze the first part of control information firstly. After the UE parses the first control information, the format of the second control information is obtained, and further how to parse the information field of the second control information is obtained. In summary, the UE only needs to search 10 candidate resource locations in the search space according to different AL blind detections, and since the first part of the control information includes the format of the second control information, the terminal can receive all the DCI it needs to receive through 10 blind detections at most. Even if a new DCI format needs to be introduced into a future wireless mobile system, the blind detection times are not increased. Certainly, the resource distribution of the search space in the schematic diagram of the embodiment is only an example, and this embodiment does not exclude that the method provided by the embodiment of the present invention may be applied to other search space structures, such as the search space structure shown in fig. 6, and may achieve the same beneficial effects.

if the received information includes format information of the second part of control information and AL information of the PDCCH, the user terminal receives the second part of control information and analyzes the second part of control information according to the format information and the AL information of the PDCCH, wherein the AL information includes AL of the PDCCH, or the AL information indicates that the AL of the PDCCH is the AL used by the user terminal to perform blind detection on the first part of control information currently.

For receiving the second part of control information, reference may be made to the above embodiment, which is not described herein again. The AL information includes that the AL of the PDCCH may indicate that, when the AL of the PDCCH is different from the AL used by the UE to analyze the first part of the control information, the AL of the PDCCH may be directly indicated by the AL information to be the AL used by the first part of the control information, which is currently detected by the UE in a blind manner, without adding an additional information bit.

Because the first part of control information comprises the format of the second part of control information and the AL information of the PDCCH, the UE can directly analyze the second part of control information according to the format of the second part of control information and the AL of the PDCCH, thereby improving the efficiency of obtaining the DCI by the UE and saving the power consumption of the UE.

For example: it is assumed that downlink control information carried on one downlink control channel includes two parts, i.e., a first part of control information and a second part of control information. The first part of control information comprises format information of the second part of control information and AL of a downlink control channel. The first part of control information may also contain information bit of other fixed contents. Suppose that the AL supported by the downlink control channel of the UE is 1, 2, 4, and 8, and the search space includes 16 control channel elements, which are referred to as CCEs in this embodiment. Suppose that the downlink control channel with AL of 1 has 6 candidate resources in the search space, the downlink control channel with AL of 2 has 6 candidate resources in the search space, the downlink control channel with AL of 4 has 2 candidate resources in the search space, and the downlink control channel with AL of 8 has 2 candidate resources in the search space. It is assumed that the information bit contained in the first part of control information is small enough to be transmitted within one CCE. Fig. 7 is a schematic diagram, in which the position of the thick solid line and the white bottom is a possible position of the downlink control channel candidate resource, the user terminal dedicated control channel candidate resource, the position of the candidate resource to be blind-detected by the terminal with the shading added, and the black shading is a position of the first part of control information transmission in the candidate resource to be blind-detected. Of course, fig. 7 is only a schematic diagram and does not represent an actual resource mapping. As shown in fig. 7, the UE needs to blindly detect 9 candidate resource locations in the search space, that is, two candidate resource locations are blindly detected when AL is 8, 1 candidate resource location is blindly detected when AL is 4, and 3 candidate resource locations are blindly detected when AL is 2 and 1, respectively. No matter how many AL are used for blind detection of the downlink control channel, the UE can always analyze the first part of control information firstly. In this embodiment, it is assumed that the first part of the control information includes the format of the second control information and the AL of the downlink control channel. After the UE parses the first control information, the format of the second control information is obtained, and further how to receive the information field of the second control information is obtained; and simultaneously obtains the AL actually used by the downlink control channel. For example, the UE blindly detects the downlink control channel according to AL — 8, and successfully obtains the first part of downlink control information at the first blind detection position. According to the first part of downlink control information, the UE definitely obtains the format of the second part of downlink control information, and further blind detection is not needed according to different formats. At the same time, the UE obtains the AL of the downlink control channel. And if the AL indicated by the first part of downlink control information is 8, the UE analyzes the second part of downlink control information according to the AL being 8. If the AL indicated by the first part of downlink control information is 4, the UE knows that the resource actually occupied by PDCCH transmission is a candidate resource numbered 0 in AL — 4; if the AL indicated by the first part of downlink control information is 2, the terminal knows that the resource actually occupied by PDCCH transmission is candidate resource with the number of 0 in AL ═ 2; if AL indicated by the first part of downlink control information is 1, the terminal knows that the resource actually occupied by PDCCH transmission is candidate resource with number 0 in AL ═ 1. I.e. the terminal does not need to blindly detect other ALs starting from the same CCE index (index). And by analogy, the processing methods of other blind detection positions are similar.

Another example is: it is assumed that downlink control information carried on one downlink control channel includes two parts, i.e., a first part of control information and a second part of control information. The first part of control information comprises format information of the second part of control information and AL of a downlink control channel. The first part of control information may also contain information bit of other fixed contents. It is assumed that the first part of control information is transmitted within fixed N CCEs, N being a positive integer greater than or equal to 1. In the present embodiment, N is assumed to be 1. Suppose that the AL supported by the downlink control channel of the UE is 2, 4, and 8, and the search space includes 16 control channel elements, which are referred to as CCEs in this embodiment. Suppose there are 6 candidate resources in the search space of the downlink control channel with AL of 2, 2 candidate resources in the search space of the downlink control channel with AL of 4, and 2 candidate resources in the search space of the downlink control channel with AL of 8. Fig. 8 shows a schematic diagram, in which the position of the thick solid line and the white background is a possible position of the candidate resource of the downlink control channel, the position of the candidate resource that needs to be blind-checked by the terminal with the background, and the black background is a position of the first part of control information transmission in the candidate resource that needs to be blind-checked. Of course, fig. 8 is only a schematic diagram and does not represent an actual resource mapping. As can be seen from fig. 8, the UE needs to blindly detect 6 candidate resource locations in the search space, that is, two candidate resource locations are blindly detected when AL is 8, 1 candidate resource location is blindly detected when AL is 4, and 3 candidate resource locations are blindly detected when AL is 2. No matter how many AL are used for blind detection of the downlink control channel, the UE can always analyze the first part of control information firstly. In this embodiment, it is assumed that the first part of the control information includes the format of the second control information and the AL of the downlink control channel. After the UE parses the first control information, the format of the second control information is obtained, and further how to receive the information field of the second control information is obtained; and simultaneously obtains the AL actually used by the downlink control channel. For example, the UE blindly detects the downlink control channel according to AL — 8, and successfully obtains the first part of downlink control information at the first blind detection position. According to the first part of downlink control information, the UE definitely obtains the format of the second part of downlink control information, and further blind detection is not needed according to different formats. At the same time, the UE obtains the AL of the downlink control channel. And if the AL indicated by the first part of downlink control information is 8, the UE decodes the second part of downlink control information according to the AL being 8. If the AL indicated by the first part of downlink control information is 4, the UE knows that the resource actually occupied by PDCCH transmission is a candidate resource numbered 0 in AL — 4; if the AL indicated by the first part of downlink control information is 2, the UE knows that the resource actually occupied by PDCCH transmission is candidate resource with a number of 0 in AL — 2. I.e. the UE does not need to blindly detect other ALs starting from the same CCE index. And by analogy, the processing methods of other blind detection positions are similar.

Optionally, the receiving and analyzing, by the UE, the second part of control information according to the received information includes: and if the received information comprises the format of the second part of control information and the number of resources occupied by the second part of control information, the UE analyzes the second part of control information according to the number of resources occupied by the second part of control information and the received information.

For receiving the second part of control information, reference may be made to the above embodiment, which is not described herein again. The analyzing the second part of control information according to the number of resources occupied by the second part of control information may be that the UE performs analysis according to the number of resources occupied by the second part of control information to obtain the second part of control information.

Because the first part of control information comprises the format of the second part of control information and the number of resources occupied by the second part of control information, the UE can directly analyze the second part of control information according to the format of the second part of control information and the number of resources occupied by the second part of control information, thereby improving the efficiency of obtaining DCI by the UE and saving the power consumption of the UE.

For example: it is assumed that the first part of control information can be transmitted in 1 control channel element or in 2 control channel elements to meet different coverage requirements. Of course, in the embodiment of the present invention, it is not excluded that the first part of the control information is transmitted with other resource granularity. The UE needs to blindly detect the first downlink control information in its own search space. And the UE blindly detects the first part of downlink control information according to different AL. As shown in fig. 9, after the UE successfully receives the first part of downlink control information, it determines how to receive and decode the second part of downlink control information according to information such as the indicated format of the second part of downlink control information, the number of resources occupied by the second part of downlink control information, and the like. The number of resources occupied by the second part of downlink control information is a positive integer greater than or equal to 1, and the network side device can indicate according to the channel condition. In addition, the resources occupied by the first part of downlink control channels and the resources occupied by the second part of downlink control channels may be continuous control channel units or discontinuous.

In this embodiment, the UE receives and analyzes the second part of the control information according to the received information may refer to the receiving and analyzing embodiment described in the embodiment where the received information provided in the above embodiment includes at least one of format information, AL information, and the number of resources occupied by the second part of the control information, which is not described herein again and may achieve the same beneficial effects.

In this embodiment, the first part of control information and the second part of control information are mapped on the same set of consecutive CCEs, so that the continuity of the first part of control information and the second part of control information can be ensured, and the UE can receive the control information conveniently.

In this embodiment, according to the analysis of the second part of control information, the UE may refer to the receiving and analyzing embodiment described in the embodiment where the received information provided in the above embodiment includes at least one of the format information of the second part of control information and the number of resources occupied by the second part of control information, which is not described herein again and may achieve the same beneficial effects.

In this embodiment, the received information included in the first part of control information further includes mapping resource location information of the second part of control information, so that the specific mapping resource location of the second part of control information can be indicated by the first part of control information, thereby improving the flexibility of the second part of control information, adapting to the service diversification of a future communication system, and improving the performance of the system.

It should be noted that, the various alternative embodiments described above may be implemented in combination with each other or separately, and the embodiment of the present invention is not limited thereto.

Referring to fig. 10, an embodiment of the present invention provides another downlink control information transmission method, as shown in fig. 10, including the following steps:

1001. the network side equipment maps a first part of control information and a second part of control information of the DCI to the same PDCCH for transmission, wherein the first part of control information comprises a fixed information field, and the information field comprises receiving information of the second part of control information included in the DCI.

The DCI may include the first part of control information and the second part of control information, where a complete DCI for scheduling a UE includes two independent transport blocks, that is, the first part of control information and the second part of control information. The first part of control information and the second part of control information are transmitted on the same control channel, and are respectively processed as two mutually independent transmission blocks, such as adding Cyclic Redundancy Check (CRC), channel coding and rate matching, and the like.

In this embodiment, the network side device may carry different control information, that is, different format control information, in the second part of control information according to the scheduled service type, transmission mode, or terminal type.

Optionally, the receiving information includes at least one of:

It should be noted that, this embodiment is used as an implementation of the network-side device corresponding to the embodiment shown in fig. 2, and specific implementation of this embodiment may refer to the relevant description of the embodiment shown in fig. 2, and in order to avoid repeated description, this embodiment is not described again. In this embodiment, because the first part of the control information includes the fixed information field, the UE does not need to perform blind detection according to a plurality of DCI formats, and the second part of the control information can be analyzed by using the receiving information included in the first part of the control information, so that the number of times of blind detection of the UE can be reduced, and the purposes of reducing the complexity of blind detection of the UE receiving DCI and reducing power consumption of the UE can be achieved.

Referring to fig. 11, an embodiment of the present invention provides a UE, as shown in fig. 11, a UE1100 includes the following modules:

a blind detection module 1101, configured to receive and parse a first part of control information included in the DCI through a blind detection PDCCH, where the first part of control information includes a fixed information field, and the information field includes received information of a second part of control information included in the DCI;

a receiving and analyzing module 1102, configured to receive and analyze the second part of control information according to the received information.

Optionally, the blind detection module 1101 is configured to receive and parse the first part of the control information included in the DCI by blind detecting the PDCCH on the PDCCH candidate resource in the search space thereof.

Optionally, the UE parses the AL of the PDCCH independently from the first part of control information.

Optionally, the receiving information includes at least one of:

Optionally, the receiving and analyzing module 1102 is configured to receive the second part of the control information and attempt to analyze the second part of the control information according to different AL according to the format information if the received information includes the format of the second part of the control information; or

The receiving and analyzing module 1102 is configured to receive a second part of control information and analyze the second part of control information according to AL information of the PDCCH if the received information includes format information of the second part of control information and AL information of the PDCCH, where the AL information includes AL of the PDCCH, or the AL information indicates that the AL of the PDCCH is an AL used by the ue to perform blind detection on the first part of control information currently; or

The receiving and analyzing module 1102 is configured to receive the second part of control information and analyze the second part of control information according to the number of resources occupied by the second part of control information and the format information if the received information includes the format of the second part of control information and the number of resources occupied by the second part of control information.

the receiving and parsing module 1102 is configured to receive and parse the second part of control information according to the received information on consecutive CCEs on which the first part of control information is received.

the receiving and parsing module 1102 is configured to receive, if the received information includes mapping resource location information of the second part of control information and format information of the second part of control information, the second part of control information at a resource location indicated by the mapping resource location information, and try to parse the second part of control information according to different ALs according to the format information; or

The receiving and parsing module 1102 is configured to receive a second part of control information and parse the second part of control information according to the number of resources occupied by the second part of control information according to the format information, at a resource position indicated by the mapped resource position information, if the received information includes the mapped resource position information of the second part of control information, the format of the second part of control information, and the number of resources occupied by the second part of control information.

It should be noted that, in this embodiment, the UE1100 may be a UE in any implementation manner in the method embodiment of the present invention, and any implementation manner of the UE in the method embodiment of the present invention may be implemented by the UE1100 in this embodiment, so as to achieve the same beneficial effects, and details are not repeated here.

Referring to fig. 12, an embodiment of the present invention provides a network side device, and as shown in fig. 12, a network side device 1200 includes the following modules:

a transmission module 1201, configured to map a first part of control information and a second part of control information of the DCI onto the same PDCCH for transmission, where the first part of control information includes a fixed information field, and the information field includes reception information of the second part of control information included in the DCI.

Optionally, the receiving information includes at least one of:

It should be noted that, in this embodiment, the network-side device 1200 may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of a receiving end in the method embodiment of the present invention may be implemented by the network-side device 1200 in this embodiment, so as to achieve the same beneficial effects, and details are not described here.

Referring to fig. 13, an embodiment of the present invention provides another structure of a UE, where the UE includes: a processor 1300, a transceiver 1310, a memory 1313, a user interface 1330, and a bus interface, wherein:

the processor 1300, which is used for reading the program in the memory 1313, executes the following processes:

receiving and parsing a first portion of control information included in the DCI through a blind detection PDCCH using a transceiver 1310, wherein the first portion of control information includes a fixed information field including reception information of a second portion of control information included in the DCI;

the UE receives and parses the second portion of control information using the transceiver 1310 according to the received information.

Among other things, the transceiver 1310 is used for receiving and transmitting data under the control of the processor 1300.

In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by the processor 1300 and memory represented by the memory 1313. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1313 may store data used by the processor 1300 in performing operations.

Optionally, the receiving and analyzing the first part of control information included in the DCI by blind detection of the PDCCH includes:

the first part of control information included in the DCI is received and parsed by blind detection of the PDCCH on PDCCH candidate resources within its search space.

Optionally, the UE parses the AL of the first part of the control information independently of the downlink control channel.

Optionally, the receiving information includes at least one of:

Optionally, the receiving and analyzing the second part of control information according to the received information includes:

if the received information comprises format information of the second part of control information, receiving the second part of control information and trying to analyze the second part of control information according to different AL according to the format information; or

If the received information comprises format information of the second part of control information and AL information of the PDCCH, receiving the second part of control information and analyzing the second part of control information according to the format information and the AL information of the PDCCH, wherein the AL information comprises AL of the PDCCH, or the AL information indicates that the AL of the PDCCH is AL used by the user terminal for blind detection of the first part of control information currently; or

And if the received information comprises the format of the second part of control information and the number of resources occupied by the second part of control information, receiving the second part of control information and analyzing the second part of control information according to the format information and the number of resources occupied by the second part of control information.

the receiving and analyzing the second part of control information according to the received information includes:

and receiving and analyzing the second part of control information according to the received information on the continuous CCE receiving the first part of control information.

if the received information comprises mapping resource position information of the second part of control information and format information of the second part of control information, receiving the second part of control information and trying to analyze the second part of control information according to different AL according to the format information at a resource position indicated by the mapping resource position information; or

If the received information includes the mapping resource position information of the second part of control information, the format of the second part of control information and the number of resources occupied by the second part of control information, receiving the second part of control information at the resource position indicated by the mapping resource position information and analyzing the second part of control information according to the format information and the number of resources occupied by the second part of control information.

It should be noted that, the UE in this embodiment may be a UE in any implementation manner in the method embodiment of the present invention, and any implementation manner of the sending end in the method embodiment of the present invention may be implemented by the UE in this embodiment, so as to achieve the same beneficial effects, and details are not described here.

Referring to fig. 14, there is shown a structure of a transmission node including: a processor 1400, a transceiver 1410, a memory 1420, a user interface 2140, and a bus interface, wherein:

the processor 1400 is used for reading the program in the memory 1420 and executing the following processes:

mapping, by the transceiver 1410, a first part of control information and a second part of control information of the DCI onto the same PDCCH for transmission, where the first part of control information includes a fixed information field, and the information field includes reception information of the second part of control information included in the DCI.

In fig. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1400 and various circuits of memory represented by memory 1420 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1410 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 2140 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.

Optionally, the receiving information includes at least one of:

It should be noted that, in this embodiment, the network-side device may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the transmission node in this embodiment, and the same beneficial effects are achieved, and details are not described here.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting downlink control information is characterized by comprising the following steps:

a user terminal receives and analyzes first part of control information included in Downlink Control Information (DCI) through a blind detection downlink control channel (PDCCH), wherein the first part of control information comprises a fixed information domain, and the information domain comprises receiving information of second part of control information included in the DCI;

and the user terminal receives and analyzes the second part of control information according to the received information.

2. The method of claim 1, wherein the user terminal receives and parses the first part of control information included in the DCI through blind detection of the PDCCH, comprising:

the user terminal receives and analyzes the first part of control information included in the DCI by blindly detecting the PDCCH on the candidate resources in the search space of the user terminal.

3. The method of claim 1, wherein the user terminal parsing the first portion of control information is independent of AL of the PDCCH.

4. The method of claim 1, wherein the first portion of control information includes an information field in which the fixed information field is a fixed information type.

5. The method of claim 1, wherein the format of the second portion of control information corresponds to at least one of:

6. The method of any of claims 1-5, wherein the receiving information comprises at least one of:

7. The method of claim 6, wherein the receiving and parsing the second portion of control information by the user terminal according to the received information comprises:

if the received information comprises format information of the second part of control information, the user terminal receives the second part of control information and tries to analyze the second part of control information according to different AL according to the format information; or

8. The method according to any of claims 1-5, wherein the first and second parts of control information are mapped on the same set of consecutive control channel elements, CCEs;

and the user terminal receives and analyzes the second part of control information according to the received information on the continuous CCE receiving the first part of control information.

9. The method according to any of claims 1-5, wherein the received information comprises format information of the second part of control information, and further comprising at least one of:

10. A method for transmitting downlink control information is characterized by comprising the following steps:

11. The method of claim 10, wherein the first portion of control information includes an information field in which the fixed information field is a fixed information type.

12. The method of claim 10, wherein the format of the second portion of control information corresponds to at least one of:

13. The method of any of claims 10-12, wherein the receiving information comprises at least one of:

14. The method of any one of claims 10-12, wherein the first portion of control information and the second portion of control information are transmitted using different transport blocks, and wherein information bits are concatenated after the first portion of control information and the second portion of control information are channel coded.

15. The method of claim 14, wherein the first portion of control information and the second portion of control information are mapped on a same set of consecutive CCEs.

16. The method of claim 14, wherein the mapped resource location of the second part of the control information is signaled by the first part of the control information, and the received information comprises format information of the second part of the control information, and further comprising at least one of:

17. A user terminal, comprising:

18. The user terminal of claim 17, wherein the blind detection module is configured to receive and parse the first portion of the control information included in the DCI by blind detecting the PDCCH on PDCCH candidate resources within its search space.

19. The user terminal of claim 17, wherein the user terminal parses the first portion of control information independently of the AL of the PDCCH.

20. The user terminal of claim 17, wherein the first portion of control information includes an information field in which the fixed information field is a fixed information type.

21. The ue of claim 17, wherein the format of the second part of control information corresponds to at least one of:

22. The user terminal according to any of claims 17-21, wherein the reception information comprises at least one of:

23. The ue of claim 22, wherein the receiving parsing module is configured to receive a second part of the control information and attempt to parse the second part of the control information according to different AL according to format information if the received information includes the format of the second part of the control information; or

24. The user terminal of any of claims 17-21, wherein the first and second portions of control information are mapped on the same set of consecutive CCEs;

25. The ue according to any of claims 17-21, wherein the received information includes format information of the second part of control information, and further comprising at least one of:

26. A network-side device, comprising:

a transmission module, configured to map a first part of control information and a second part of control information of the DCI onto the same PDCCH for transmission, where the first part of control information includes a fixed information field, and the information field includes reception information of the second part of control information included in the DCI.

27. The network-side device of claim 26, wherein the first portion of control information comprises an information field in which the fixed information field is a fixed information type.

28. The network-side device of claim 26, wherein the format of the second part of control information corresponds to at least one of:

29. The network-side device of any one of claims 26-28, wherein the received information comprises at least one of:

30. The network device of any one of claims 26-28, wherein the first part of control information and the second part of control information are transmitted using different transport blocks, and wherein information bits are concatenated after the first part of control information and the second part of control information are channel coded.

31. The network-side device of claim 30, wherein the first and second portions of control information are mapped on a same set of consecutive CCEs.

32. The network-side device of claim 30, wherein the resource mapping location of the second part of the control information is notified by the first part of the control information, and the receiving information includes format information of the second part of the control information, and further includes at least one of: