CN109088697B - Control information sending method, device and system - Google Patents

Control information sending method, device and system Download PDF

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Publication number
CN109088697B
CN109088697B CN201710444262.0A CN201710444262A CN109088697B CN 109088697 B CN109088697 B CN 109088697B CN 201710444262 A CN201710444262 A CN 201710444262A CN 109088697 B CN109088697 B CN 109088697B
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control information
length
field
base station
terminal device
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CN201710444262.0A
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CN109088697A (en
Inventor
张兴炜
薛丽霞
冯淑兰
黎超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710444262.0A priority Critical patent/CN109088697B/en
Priority to PCT/CN2018/091098 priority patent/WO2018228439A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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

Abstract

The application discloses a method, a device and a system for sending control information, so that terminal equipment can obtain indication information existing in the control information with low signaling overhead. The method includes that terminal equipment receives first control information sent by a base station, the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field; the terminal equipment receives second control information sent by the base station, and the length and/or field composition of the second control information are determined by the terminal equipment according to the first control information, so that the terminal equipment can acquire the indication information of the control information to be detected with lower signaling overhead.

Description

Control information sending method, device and system
Technical Field
The present application relates to the field of communications, and in particular, to a method, an apparatus, and a system for sending control information.
Background
A fifth Generation (5th Generation, 5G) communication system is required to have higher performance than the previous communication system. A New 5G base station (New RAT, NR) defines a New air interface access technology to support the user experience rate of 0.1-1 Gbps, the connection density of one million per square kilometer, the end-to-end time delay of millisecond level, the flow density of dozens of Tbps per square kilometer, the mobility of more than 500Km per hour and the peak rate of dozens of Gbps.
In the 5G NR, there are many Information that needs to be dynamically indicated, for example, the Information includes resource related indication Information, timing related indication Information, indication Information related to Coordinated Multiple Points Transmission/Reception (CoMP), indication Information related to Multiple-Input Multiple-Output (MIMO) technology, indication Information related to control channels, indication Information related to scheduling, indication Information related to initial access, indication Information related to measurement trigger, indication Information related to reference signals, indication Information related to Hybrid Automatic repeat request (HARQ), and the like. In order to reduce signaling overhead, a possible solution is to carry partial indication information in DCI, so as to avoid that the total overhead of DCI is large, and at this time, how to design a transmission scheme of control information, so that a terminal device can obtain the indication information existing in DCI with low signaling overhead is a problem to be solved.
Disclosure of Invention
The embodiment of the application provides a method, a device and a system for sending control information, so that terminal equipment can obtain indication information existing in the control information with low signaling overhead.
The embodiment of the application provides the following specific technical scheme:
in a first aspect, a method for sending control information is provided, including:
the method comprises the steps that terminal equipment receives first control information sent by a base station, wherein the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field;
and the terminal equipment receives second control information sent by the base station, wherein the length and/or field composition of the second control information is determined by the terminal equipment according to the first control information.
The first control information comprises the configuration information of the second control information, so that the terminal equipment can quickly determine the length and/or field composition of the second control information to be detected according to the first control information after receiving the first control information, and the signaling overhead is reduced.
With reference to the first aspect, in one possible design, the configuration information further includes a presence indication whether a field is present in the second control information.
In the design, the terminal device determines whether the corresponding field exists in the second control information through the existence indication in the configuration information, so that the field needing to be detected in the second control information is determined, the blind detection times are reduced, and the detection efficiency is improved.
With reference to the first aspect, in a possible design, the first control information is one of a radio resource control RRC information element IE, a media access control MAC control element CE, downlink control information, and broadcast information.
With reference to the first aspect, in one possible design, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
With reference to the first aspect, in one possible design, a length and/or a field composition of the second control information is determined by the terminal device according to the first control information, and includes:
the terminal equipment calculates the length sum of fields with the length not being zero or fields except for the fields with the existence indication being nonexistent to obtain the length of the second control information needing to be detected;
or the terminal equipment calculates the length of a field with the length not being zero or the length of a field except for the field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected;
or, the terminal device obtains the field with length not zero or the field arrangement order with the indication as existence to obtain the field composition of the second control information;
or, the terminal device obtains the length of the field corresponding to the field number, and calculates the sum of the lengths of the fields corresponding to the field numbers to obtain the length of the second control information to be detected;
or, the terminal device determines the field composition of the second control information based on the permutation order of the numbers of the fields.
In the design, the terminal device can determine the length and/or the field composition of the second control information to be detected by adopting various combinations in the scheme, and the mode is flexible.
With reference to the first aspect, in a possible design, the terminal device receives the first control information sent by the base station on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
With reference to the first aspect, in one possible design, a length and/or a field composition of the second control information is determined by the terminal device according to the first control information, and includes:
and the terminal equipment determines the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
In the design, the terminal equipment determines the length and/or the field composition of the second control information in an implicit mode according to the first resource for sending the first control information, signaling indication is not needed, and signaling overhead is reduced.
With reference to the first aspect, in one possible design, the method further includes:
the terminal equipment receives third control information sent by the base station, wherein the third control information comprises a length indication of the second control information;
the terminal device determines the length of the second control information based on the length indication of the second control information.
In the design, the terminal device determines the length of the second control information through the length indication included in the third control information, and the implementation mode is simple and the operability is strong.
With reference to the first aspect, in one possible design, the method further includes:
the terminal equipment receives the transmission mode configured by the base station;
the terminal device determines a length of the second control information based on the transmission mode.
With reference to the first aspect, in one possible design, the method further includes:
and the terminal equipment determines the length of the second control information according to a predefined standard length or a length threshold value.
In the design, the standard length or the length threshold of the second control information is limited, the blind detection times of the terminal equipment for the second control information can be reduced, and the detection efficiency is improved.
In a second aspect, a method for sending control information is provided, including:
a base station sends first control information to terminal equipment, wherein the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field;
and the base station sends the second control information to the terminal equipment.
In the above scheme, the base station configures the first control information containing the configuration information of the second control information to the terminal device, so that the terminal device can conveniently and quickly determine the length and/or field composition of the second control information to be detected according to the first control information, and signaling overhead is reduced.
With reference to the second aspect, in one possible design, the configuration information further includes a presence indication whether the field is present in the second control information.
In the design, the base station can enable the terminal device to determine whether the corresponding field in the first control information exists in the second control information through the existence indication in the configuration information, so that the field needing to be detected in the second control information is determined, the blind detection frequency is reduced, and the detection efficiency is improved.
With reference to the second aspect, in a possible design, the first control information is one of a radio resource control RRC information element IE, a media access control MAC control element CE, downlink control information, and broadcast information.
With reference to the second aspect, in one possible design, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
With reference to the second aspect, in a possible design, the base station sends the first control information to the terminal device on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a spatial domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
With reference to the second aspect, in one possible design, the method further includes:
and the base station sends third control information to the terminal equipment, wherein the third control information comprises the length indication of the second control information.
With reference to the second aspect, in one possible design, the method further includes:
and the base station configures a transmission mode to the terminal equipment, so that the terminal equipment determines the length of the second control information.
In a third aspect, a terminal device is provided, including:
a receiving unit, configured to receive first control information sent by a base station, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
the processing unit is used for determining the length and/or field composition of the second control information according to the first control information;
the receiving unit is further configured to receive second control information sent by the base station, where a length and/or a field composition of the second control information is determined by the processing unit according to the first control information.
With reference to the third aspect, in one possible design, the configuration information further includes a presence indication whether a field is present in the second control information.
With reference to the third aspect, in a possible design, the first control information is one of a radio resource control RRC information element IE, a medium access control MAC control element CE, downlink control information, and broadcast information.
With reference to the third aspect, in one possible design, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
With reference to the third aspect, in one possible design, the processing unit is further configured to:
calculating the sum of the lengths of fields with the lengths not equal to zero or fields except for the fields with the existence indication as nonexistent to obtain the length of the second control information needing to be detected;
or, calculating the length of a field with the length not being zero or a field except for a field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected;
or, obtaining the field with length not zero or the field arrangement sequence with indication as existence to obtain the field composition of the second control information;
or, acquiring the length of the field corresponding to the field number, and calculating the sum of the lengths of the fields corresponding to the field number to obtain the length of the second control information to be detected;
or, determining field composition of the second control information based on an arrangement order of numbers of the fields.
With reference to the third aspect, in one possible design, the receiving unit is further configured to: receiving the first control information sent by the base station on first resources, where the first resources include at least one of time domain resources, frequency domain resources, space domain resources, code domain resources, and power domain resources used for sending the first control information, and different first resources are mapped to different field configuration information.
With reference to the third aspect, in one possible design, the processing unit is further configured to:
and determining the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
With reference to the third aspect, in one possible design, the receiving unit is further configured to:
receiving third control information sent by the base station, wherein the third control information comprises a length indication of the second control information;
the processing unit is further configured to determine a length of the second control information based on the length indication of the second control information.
With reference to the third aspect, in one possible design, the receiving unit is further configured to:
receiving a transmission mode configured by the base station;
the processing unit is further configured to determine a length of the second control information based on the transmission mode.
With reference to the third aspect, in one possible design, the processing unit is further configured to:
determining the length of the second control information according to a predefined standard length or a length threshold.
On the other hand, the entity device corresponding to the processing unit in the above embodiments may be a processor, and the entity device corresponding to the receiving unit may be a receiver.
In a fourth aspect, a base station is provided, which includes a processing unit and a transmitting unit:
the processing unit is used for controlling the sending unit to send information;
the sending unit is configured to send first control information to the terminal device, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
the sending unit is further configured to send the second control information to the terminal device.
With reference to the fourth aspect, in one possible design, the configuration information further includes a presence indication whether the field is present in the second control information.
With reference to the fourth aspect, in a possible design, the first control information is one of a radio resource control RRC information element IE, a media access control MAC control element CE, downlink control information, and broadcast information.
With reference to the fourth aspect, in one possible design, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
With reference to the fourth aspect, in a possible design, the sending unit sends the first control information to the terminal device on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
With reference to the fourth aspect, in one possible design, the sending unit is further configured to:
and sending third control information to the terminal equipment, wherein the third control information comprises the length indication of the second control information.
With reference to the fourth aspect, in one possible design, the sending unit is further configured to:
and configuring a transmission mode to the terminal equipment, so that the terminal equipment determines the length of the second control information.
On the other hand, the entity device corresponding to the processing unit in the above embodiments may be a processor, and the entity device corresponding to the sending unit may be a transmitter.
In a fifth aspect, a communication system is provided, which includes the terminal device and the base station in the above embodiments.
In a sixth aspect, a computer storage medium is provided for storing computer software instructions for the terminal device, which includes a program designed to execute the above aspects.
In a seventh aspect, a computer storage medium is provided for storing computer software instructions for the base station, which comprises a program designed for executing the above aspects.
In an eighth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
Drawings
Fig. 1 is a flowchart illustrating a method for sending control information according to an embodiment of the present application;
fig. 2a, fig. 2b and fig. 2c are schematic diagrams illustrating the composition of the first control information in the embodiment of the present application;
fig. 3 is a flowchart of a method for sending control information in an embodiment of the present application;
fig. 4a is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 4b is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present application;
fig. 5a is a schematic structural diagram of a base station according to an embodiment of the present application;
fig. 5b is a schematic diagram of a hardware structure of a base station according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In the embodiment of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in the embodiment of the present application generally indicates that the preceding and following related objects are in an "or" relationship.
Plural means two or more.
The sending method of the control information related to the embodiment of the application is suitable for a Long Term Evolution (LTE) system or a 5G system; in addition, the transmission method of the control information according to the embodiment of the present application may also be applied to other wireless Communication systems, such as a Global System for Mobile Communication (GSM), a Mobile Communication System (UMTS), a Code Division Multiple Access (CDMA) System, a new network System, and the like.
The base station in the embodiment of the present application may be configured to convert a received air frame and an Internet Protocol (IP) packet into each other, and use the converted packet as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an IP network; in addition, the base station in the embodiment of the present application can also coordinate the attribute management of the air interface. For example, the base Station in this embodiment may be a Base Transceiver Station (BTS) in a Global System for mobile communication (GSM) or Code Division Multiple Access (CDMA), a base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB) or e-NodeB in LTE, a base Station in a 5G System, or a central unit or a data unit in a 5G System, which is not limited in this embodiment.
The terminal device in embodiments of the present application may be a device for providing voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. The terminal device may also be a wireless terminal device, wherein the wireless terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and the wireless terminal device may be a mobile terminal device, such as a mobile phone (or referred to as a "cellular" phone), or a computer with a mobile terminal device, for example, the computer with a mobile terminal device may be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, which exchanges language and/or data with the RAN. For example, the Wireless terminal device may be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or the like. The wireless Terminal Device may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal Device (Remote Terminal), an Access Terminal Device (Access Terminal), a User Terminal Device (User Terminal), a User Agent (User Agent), a User Device (User Device), or a User Equipment (User Equipment, UE).
The embodiment of the application provides a method, a device and a system for sending control information, so that terminal equipment can obtain indication information existing in the control information with low signaling overhead. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
Fig. 1 is a schematic flowchart illustrating a method for sending control information according to an embodiment of the present application, where the flowchart may be specifically implemented by hardware, software programming, or a combination of hardware and software.
The terminal device may be configured to execute the process shown in fig. 1, and the functional modules in the terminal device for executing the transmission scheme of the control information provided in the embodiments of the present application may be specifically implemented by hardware, software programming, and a combination of hardware and software, where the hardware may include one or more signal processing and/or application specific integrated circuits.
As shown in fig. 1, the process specifically includes the following processing procedures:
step 10: the terminal equipment receives first control information sent by a base station, wherein the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field.
Further, the field configuration information further includes a presence indication whether a field is present in the second control information.
Specifically, the presence indication in the embodiment of the present application may be indicated by using 1 bit, where the state is 1 to indicate that the field exists in the second control information, and the state is 0 to indicate that the field does not exist in the second control information; the coding can also be combined with other fields, or the redundant state of other fields can be used, wherein the redundant state is used to indicate that the redundant state does not exist, and the normal state is used to indicate that the redundant state exists; it may also be indicated by a field length, indicating absence when the length is 0 and presence when the length is other than 0.
The first Control Information is a Radio Resource Control (RRC) Information Element (IE), a Media Access Control (MAC) Control Element (CE), downlink Control Information, or broadcast Information. The second control information is downlink control information.
Further, when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
Wherein the field is composed of at least one of a predefined field, a variable field, and an optional field. The predefined field is a field which must exist in the second control information and has a fixed length; the variable field is a field with variable length in the second control information; the optional field is a field that may or may not be present in the second control information.
Step 11: and the terminal equipment receives second control information sent by the base station, wherein the length and/or field composition of the second control information is determined by the terminal equipment according to the first control information.
The field composition of the second control information refers to which fields the second control information includes, the length of the fields, and the order of the fields. Different fields in the second control information are used to indicate different information or functions.
Specifically, when the terminal device determines the length and/or field composition of the second control information to be detected based on the first control information, the method may be implemented in the following manner:
the first method is as follows: and the terminal equipment calculates the sum of the lengths of the fields with the lengths not equal to zero or the lengths of the fields except the fields with the existence indication as nonexistence to obtain the length of the second control information needing to be detected.
It should be noted that the presence indication in the field configuration information may be used to indicate whether the field is present in the second control information, and may also be used to indicate whether the field is not present in the second control information.
The second method comprises the following steps: and the terminal equipment calculates the length of a field with the length not being zero or the length of a field except for the field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected.
The third method comprises the following steps: and the terminal equipment acquires the field arrangement sequence of the fields with the length not being zero or the existence indication being existence in the first control information to obtain the field composition of the second control information.
The method is as follows: and the terminal equipment acquires the length of the field corresponding to the field number, calculates the sum of the lengths of the fields corresponding to the field number, and obtains the length of the second control information to be detected.
The fifth mode is as follows: and the terminal equipment determines the field composition of the second control information based on the permutation sequence of the serial numbers of the fields.
In a first possible design, the field of the second control information is composed of a predefined field and a variable-length field, which can be seen in fig. 2 a. As shown in fig. 2a, the first control information includes 12 fields, and the predefined field is located in front of the variable field, which is only an illustration, and the arrangement order of the fixed field and the variable field is not limited in this application.
As shown in fig. 2a, the field configuration information of each field in the first control information includes a length of the field, and at this time, the presence or absence in the presence indication may be represented by a length, where the length is 0, that is, the presence is absent, and the length is not 0, that is, the presence is present. Alternatively, in a possible design, the first control information only indicates field configuration information of a variable field in the second control information, and the field configuration information of the predefined field is pre-protocol-specified without the first control information indication.
Further, after receiving the first control information, the terminal device extracts fields with lengths not zero in the first control information, calculates the sum of the lengths as the length of the second control information to be detected in the period, and the front and back arrangement sequence of the fields with lengths not zero is composed of the fields of the second control information. Or, optionally, the terminal device extracts fields except for the field with the non-existence indication in the first control information, calculates a sum of lengths of the fields except for the field with the non-existence indication as the length of the second control information to be detected in the period, and forms fields with the length being not zero with a front-back arrangement sequence of the fields as the second control information.
In a second possible design, the field of the second control information is composed of a predefined field, a variable-length field, and an optional field, which can be specifically shown in fig. 2 b. As shown in fig. 2b, 12 fields are included in the first control information, and the predefined field precedes the variable field and the optional field, because if the variable field or the optional field precedes, decoding of the variable field into 3 bits, but actually 4 bits, may affect decoding of the following field once decoding is wrong. The fixed length predefined field is preceded at least to ensure correct decoding of the predefined field. Of course, this is only an illustration, and the arrangement order of the fixed field, the variable field, and the optional field is not limited in this application.
As shown in fig. 2b, the field configuration information of each field in the first control information includes a length of the field, and a presence indication whether the field is present in the second control information, that is, each field has two parameters, the length of the field indicates a bit number of the field, and the presence indication indicates whether the field is present or absent in the second control information to be currently detected, as shown in fig. 2 b. Wherein, the first control information is added with an optional field besides the predefined field and the variable field, and the predefined field can be arranged in front of the variable field and the optional field. Alternatively, in one possible design, the first control information only indicates the field configuration information of the variable field and the optional field in the second control information, and the field configuration information of the predefined field is pre-protocol-specified without the first control information indication.
Further, after the terminal device receives the first control information, other fields except for the field with the existence indication of non-existence in the optional field, including the predefined field, the variable field and the optional field with the existence indication of existence, are extracted, the sum of the lengths of the fields is the length of the second control information to be detected in the period of time, and the front and back arrangement sequence of the fields is composed of the fields of the second control information.
If there are more fields, for example, 50 fields, which may appear in the second control information, and more than half of the fields may be optional fields, optionally, the base station notifies the terminal device of the numbers (index) of the fields of the second control information to be detected in the current period of time through the first control information or in an implicit manner, where the field corresponding to each number has a predetermined fixed length, as shown in fig. 2 c.
Further, the terminal device obtains the length of the field corresponding to the field number, calculates the sum of the lengths of the fields corresponding to the field number, and obtains the length of the second control information to be detected, wherein the sequence of the field numbers is composed of the fields of the second control information.
Specifically, when the base station notifies the terminal device of the field configuration information of the second control information to be detected within the current period of time in an implicit manner, in a possible implementation manner, the terminal device receives the first control information sent by the base station on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
Further, the terminal device determines the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
For example, the base station indicates field composition of the second control information in an implicit manner, specifically, the base station maps to different field compositions of the second control information according to a first resource for sending the first control information, where the first resource for sending the first control information includes time domain/frequency domain/space domain/code domain/power domain resources, such as time domain slot number, symbol number, subframe number, radio frame number, slot type (slot type), and the like; frequency domain bandwidth, partial bandwidth, sub-band, Resource Block (RB) number, RB number, etc.; the beam number of the space domain, the antenna port and the like, various coding resources of the code domain, such as root sequences, cyclic shift, orthogonal masks and the like; various power parameters of the power domain. For example, if the scheduled time slot is a downlink transmission time slot (DL-only slot), the terminal device only blindly detects the corresponding downlink control information length (DL DCI size) in the scheduling time slot of the corresponding time sequence; for another example, the length mapping of the second control information is different between the terminal device configured with the wide band (100-400M) and the terminal device configured with the narrow band for blind detection.
It should be noted that the implicit method may be used in combination with the explicit signaling method, for example, the base station notifies the field composition of the second control information through the explicit signaling, that is, the first control information, and the terminal device filters the length of the second control information through the resource parameter of the first resource according to the implicit method.
Or, the terminal device determines the length of the second control information according to a predefined standard length or a length threshold. Or, the terminal device receives third control information sent by the base station, where the third control information includes a length indication of the second control information; the terminal device determines the length of the second control information based on the length indication of the second control information.
The standard length refers to the length of the predefined limited second control information, i.e. the length of the second control information can only be these values. The terminal equipment determines the length of the second control information according to at least one of the standard lengths.
The length threshold refers to a plurality of different threshold intervals into which the length of the second control information is divided according to different lengths, the length of the second control information to be detected by the terminal device only falls in a limited number of intervals, and only a limited number of values are taken in one interval. For example, the length of the second control information is divided into a plurality of sections, or a length threshold of the lengths of the plurality of second control information is set, for example:
interval 1: <20 bits
Interval 2: [20,30) bits
Interval 3: [30,40) bits
Interval 4: [40,50) bits
Interval 5: 50 bits >
In order to reduce the number of blind detection times of the terminal device for the second control information, the terminal device is limited to a specific number of blind detection intervals in one time slot, for example, only 1 blind detection interval in one time slot; and limiting the length of the second control information for blind detection in one interval of the terminal device, for example, limiting the bit number of the second control information for blind detection to be a specific number, for example, two bit values in one interval need to be blind detected. A bit value of a second control information corresponds to a specific field component. The base station informs the terminal equipment of the interval number or the length threshold value, and the terminal equipment screens out a limited number of lengths in a specific interval through the slot number/slot type/subband number.
Or the terminal equipment determines the length and/or field composition of the second control information to be detected according to the number of the second control information.
Specifically, the base station and the terminal device predefine a limited number of patterns (patterns) of the second control information in advance, and number each pattern, and the base station notifies the pattern number to the terminal device through the first control information or in an implicit manner. The design method of each pattern may be similar to the design of fig. 2a to 2c, that is, the length of the field and/or the presence indication of the presence may be included, and the field number may also be included. In this way, the terminal device can determine the length and/or field composition of the second control information to be detected according to the number of the second control information.
In a possible implementation manner, the terminal device receives a transmission mode configured by the base station; the terminal device determines a length of the second control information based on the transmission mode.
Correspondingly, fig. 3 shows a schematic flow chart of a method for sending control information at a base station side according to an embodiment of the present application, where the flow chart may be specifically implemented by hardware, software programming, or a combination of hardware and software.
The base station may be configured to execute the process shown in fig. 1, and the functional modules in the base station for executing the transmission scheme of the control information provided in the embodiments of the present application may be specifically implemented by hardware, software programming, and a combination of hardware and software, and the hardware may include one or more signal processing and/or application specific integrated circuits.
As shown in fig. 3, the process specifically includes the following processing procedures:
step 30: the base station sends first control information to the terminal equipment, wherein the first control information comprises second control information configuration information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field.
Wherein the configuration information further comprises a presence indication of whether the field is present in the second control information.
In one possible design, the base station sends the first control information to the terminal device on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a spatial domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
Step 31: and the base station sends the second control information to the terminal equipment.
Specifically, the first control information is RRC IE, MAC CE, downlink control information, or broadcast information. The second control information is downlink control information. When the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
Optionally, the base station sends third control information to the terminal device, where the third control information includes a length indication of the second control information.
Based on the same concept, the embodiment of the present application further provides a terminal device, where the terminal device is configured to execute the actions or functions of the terminal device in the foregoing method embodiment.
Based on the same concept, the embodiment of the present application further provides a base station, and the base station is configured to perform the actions or functions of the base station in the foregoing method embodiments.
For the sake of brevity, the contents of the apparatus portion may be found in the method embodiments, and the repeated descriptions are omitted.
As shown in fig. 4a, a terminal device 400a according to an embodiment of the present application includes a processing unit 410a and a receiving unit 420a, where:
a receiving unit 420a, configured to receive first control information sent by a base station, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
a processing unit 410a, configured to determine, according to the first control information, a length and/or a field composition of the second control information;
the receiving unit 420a is further configured to receive second control information sent by the base station, where a length and/or a field composition of the second control information is determined by the processing unit 410a according to the first control information.
Optionally, the configuration information further includes a presence indication whether a field is present in the second control information.
Optionally, the first control information is one of a radio resource control RRC information element IE, a media access control MAC control element CE, downlink control information, and broadcast information.
Optionally, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
Optionally, the processing unit is further configured to:
calculating the sum of the lengths of fields with the lengths not equal to zero or fields except for the fields with the existence indication as nonexistent to obtain the length of the second control information needing to be detected;
or, calculating the length of a field with the length not being zero or a field except for a field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected;
or, obtaining the field with length not zero or the field arrangement sequence with indication as existence to obtain the field composition of the second control information;
or, acquiring the length of the field corresponding to the field number, and calculating the sum of the lengths of the fields corresponding to the field number to obtain the length of the second control information to be detected;
or, determining field composition of the second control information based on an arrangement order of numbers of the fields.
Optionally, the receiving unit 420a is further configured to: receiving the first control information sent by the base station on first resources, where the first resources include at least one of time domain resources, frequency domain resources, space domain resources, code domain resources, and power domain resources used for sending the first control information, and different first resources are mapped to different field configuration information.
Optionally, the processing unit is further configured to:
and determining the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
Optionally, the receiving unit 420a is further configured to:
receiving third control information sent by the base station, wherein the third control information comprises a length indication of the second control information;
the processing unit 410a is further configured to determine a length of the second control information based on the length indication of the second control information.
Optionally, the receiving unit 420a is further configured to:
receiving a transmission mode configured by the base station;
the processing unit 410a is further configured to determine a length of the second control information based on the transmission mode.
Optionally, the processing unit 410a is further configured to:
determining the length of the second control information according to a predefined standard length or a length threshold.
For all possible implementation manners of the terminal device 400a in the embodiment of the present application, refer to all possible implementation manners of the terminal device in the embodiment of the present application.
It should be noted that in the embodiment of the present application, the processing unit 410a may be implemented by a processor, and the receiving unit 410a may be implemented by a transceiver. As shown in fig. 4b, the terminal device 400b may include a processor 410b, a transceiver 420b, and a memory 430 b. The memory 430b may be used to store a program or code preinstalled at the time of shipment of the terminal device 400b, or may store a code or the like used when the processor 410b executes.
The processor 410b may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits, and is configured to execute relevant operations to implement the technical solutions provided in the embodiments of the present application.
It should be noted that although the terminal device 400b shown in fig. 4b only shows the processor 410b, the transceiver 420b and the memory 430b, in a specific implementation process, a person skilled in the art should understand that the terminal device 400b also contains other components necessary for normal operation. Meanwhile, it will be understood by those skilled in the art that the terminal device 400b may also include hardware components for implementing other additional functions according to specific needs. Furthermore, it should be understood by those skilled in the art that the terminal device 400b may also include only the devices or modules necessary for implementing the embodiments of the present application, and not necessarily all of the devices shown in fig. 4 b.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, or the like.
As shown in fig. 5a, the first base station 500a in the embodiment of the present application includes: a processing unit 510a and a transmitting unit 520a, wherein:
the processing unit 510a is configured to control the sending unit to send information;
the sending unit 520a is configured to send first control information to the terminal device, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
the sending unit 520a is further configured to send second control information to the terminal device.
Optionally, the configuration information further includes a presence indication whether the field is present in the second control information.
Optionally, the first control information is one of a radio resource control RRC information element IE, a media access control MAC control element CE, downlink control information, and broadcast information.
Optionally, the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
Optionally, the sending unit 520a sends the first control information to the terminal device on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
Optionally, the sending unit 520a is further configured to:
and sending third control information to the terminal equipment, wherein the third control information comprises the length indication of the second control information.
Optionally, the sending unit 520a is further configured to:
and configuring a transmission mode to the terminal equipment, so that the terminal equipment determines the length of the second control information.
For all possible implementations of the base station 500a in the embodiment of the present application, refer to all possible implementations of the base station in the embodiment of the present application.
It should be noted that in the embodiment of the present application, the processing unit 510a may be implemented by a processor, and the transmitting unit 520a may be implemented by a transceiver. As shown in fig. 5b, the base station 500b may include a processor 510b, a transceiver 520b, and a memory 530 b. The memory 530b may be used to store a program/code preinstalled at the time of shipment of the first base station 500b, or may store a code or the like used when the processor 55b executes.
The processor 510b may be a general Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, configured to perform related operations to implement the technical solution provided in the embodiment of the present Application.
It should be noted that although the base station 500b shown in fig. 5b only shows the processor 510b, the transceiver 520b and the memory 530b, in a specific implementation, it should be understood by those skilled in the art that the base station 500b also contains other components necessary for normal operation. Also, the base station 500b may comprise hardware components for performing other additional functions, as may be apparent to those skilled in the art, according to particular needs. Furthermore, those skilled in the art should understand that the base station 500b may also only contain the devices or modules necessary for implementing the embodiments of the present application, and not necessarily all of the devices shown in fig. 5 b.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims (27)

1. A method for transmitting control information, comprising:
the method comprises the steps that terminal equipment receives first control information sent by a base station, wherein the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field;
and the terminal equipment receives second control information sent by the base station, wherein the length and/or field composition of the second control information is determined by the terminal equipment according to the first control information.
2. The method of claim 1, wherein the length and/or field composition of the second control information is determined by the terminal device based on the first control information, comprising:
the terminal equipment calculates the length sum of fields with the length not being zero or fields except for the fields with the existence indication being nonexistent to obtain the length of the second control information needing to be detected;
or the terminal equipment calculates the length of a field with the length not being zero or the length of a field except for the field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected;
or, the terminal device obtains the field with length not zero or the field arrangement order with the indication as existence to obtain the field composition of the second control information;
or, the terminal device obtains the length of the field corresponding to the field number, and calculates the sum of the lengths of the fields corresponding to the field numbers to obtain the length of the second control information to be detected;
or, the terminal device determines the field composition of the second control information based on the permutation order of the numbers of the fields.
3. The method of claim 1 or 2, wherein the terminal device receives the first control information transmitted by the base station, and comprises: the terminal device receives the first control information sent by the base station on a first resource, where the first resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource, a code domain resource, and a power domain resource used for sending the first control information, and different first resources are mapped to different field configuration information.
4. The method of claim 3, wherein the length and/or field composition of the second control information is determined by the terminal device according to the first control information, comprising:
and the terminal equipment determines the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
5. The method of claim 1 or 2, wherein the method further comprises:
the terminal equipment receives third control information sent by the base station, wherein the third control information comprises a length indication of the second control information;
the terminal device determines the length of the second control information based on the length indication of the second control information.
6. The method of claim 1 or 2, wherein the method further comprises:
the terminal equipment receives the transmission mode configured by the base station;
the terminal device determines a length of the second control information based on the transmission mode.
7. The method of claim 1 or 2, wherein the method further comprises:
and the terminal equipment determines the length of the second control information according to a predefined standard length or a length threshold value.
8. A method for transmitting control information, comprising:
a base station sends first control information to terminal equipment, wherein the first control information comprises configuration information of second control information, and the configuration information comprises at least one of the length of the second control information, the number of the second control information, the length of a field and the number of the field;
and the base station sends the second control information to the terminal equipment.
9. The method of claim 8, wherein the base station transmitting the first control information to the terminal device comprises: the base station sends the first control information to the terminal equipment on a first resource, wherein the first resource comprises at least one of time domain resources, frequency domain resources, space domain resources, code domain resources and power domain resources used for sending the first control information, and different first resources are mapped to different field configuration information.
10. The method of claim 8 or 9, wherein the method further comprises:
and the base station sends third control information to the terminal equipment, wherein the third control information comprises the length indication of the second control information.
11. The method of claim 8 or 9, wherein the method further comprises:
and the base station configures a transmission mode to the terminal equipment, so that the terminal equipment determines the length of the second control information.
12. A terminal device, comprising:
a receiving unit, configured to receive first control information sent by a base station, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
the processing unit is used for determining the length and/or field composition of the second control information according to the first control information;
the receiving unit is further configured to receive second control information sent by the base station.
13. The terminal device of claim 12, wherein the processing unit is further to:
calculating the sum of the lengths of fields with the lengths not equal to zero or fields except for the fields with the existence indication as nonexistent to obtain the length of the second control information needing to be detected;
or, calculating the length of a field with the length not being zero or a field except for a field with the existence indication being nonexistent, and the sum of the lengths of the predefined fields to obtain the length of the second control information needing to be detected;
or, obtaining the field with length not zero or the field arrangement sequence with indication as existence to obtain the field composition of the second control information;
or, acquiring the length of the field corresponding to the field number, and calculating the sum of the lengths of the fields corresponding to the field number to obtain the length of the second control information to be detected;
or, determining field composition of the second control information based on an arrangement order of numbers of the fields.
14. The terminal device according to claim 12 or 13, wherein the receiving unit is further configured to: receiving the first control information sent by the base station on first resources, where the first resources include at least one of time domain resources, frequency domain resources, space domain resources, code domain resources, and power domain resources used for sending the first control information, and different first resources are mapped to different field configuration information.
15. The terminal device of claim 14, wherein the processing unit is further to:
and determining the length and/or field composition of the second control information to be detected according to the first control information and the first resource.
16. The terminal device according to claim 12 or 13, wherein the receiving unit is further configured to:
receiving third control information sent by the base station, wherein the third control information comprises a length indication of the second control information;
the processing unit is further configured to determine a length of the second control information based on the length indication of the second control information.
17. The terminal device according to claim 12 or 13, wherein the receiving unit is further configured to:
receiving a transmission mode configured by the base station;
the processing unit is further configured to determine a length of the second control information based on the transmission mode.
18. The terminal device of claim 12 or 13, wherein the processing unit is further configured to:
determining the length of the second control information according to a predefined standard length or a length threshold.
19. A base station, comprising a processing unit and a transmitting unit:
the processing unit is used for controlling the sending unit to send information;
the sending unit is configured to send first control information to the terminal device, where the first control information includes configuration information of second control information, and the configuration information includes at least one of a length of the second control information, a number of the second control information, a length of a field, and a number of the field;
the sending unit is further configured to send the second control information to the terminal device.
20. The base station of claim 19, wherein the transmitting unit transmits the first control information to the terminal device on a first resource, the first resource comprising at least one of a time domain resource, a frequency domain resource, a spatial domain resource, a code domain resource, and a power domain resource used for transmitting the first control information, wherein different first resources are mapped to different field configuration information.
21. The base station according to claim 19 or 20, wherein said transmitting unit is further configured to:
and sending third control information to the terminal equipment, wherein the third control information comprises the length indication of the second control information.
22. The base station according to claim 19 or 20, wherein said transmitting unit is further configured to:
and configuring a transmission mode to the terminal equipment, so that the terminal equipment determines the length of the second control information.
23. The method according to claim 1 or 2 or the terminal device according to claim 12 or 13 or the base station according to claim 19 or 20, characterized in that the configuration information further comprises a presence indication whether a field is present in the second control information.
24. The method according to claim 1 or 2 or the terminal device according to claim 12 or 13 or the base station according to claim 19 or 20, wherein the first control information is one of a radio resource control, RRC, information element, IE, a media access control, MAC, control element, CE, downlink control information, broadcast information.
25. The method according to claim 1 or 2 or the terminal device according to claim 12 or 13 or the base station according to claim 19 or 20, wherein the second control information is downlink control information; when the first control information is downlink control information, the first control information is common downlink control information, or the first control information is downlink control information received before the second control information.
26. A communication system, characterized in that the communication system comprises a terminal device according to any of claims 12-18, 23-25 and a base station according to any of claims 19-22, 23-25.
27. A computer-readable storage medium storing a computer program for executing the instructions of the method according to any one of claims 1-11, 23-25.
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