CN114040475A

CN114040475A - Method, equipment and system for transmitting downlink control information

Info

Publication number: CN114040475A
Application number: CN202111149915.5A
Authority: CN
Inventors: 丁志明; 庄宏成; 杜振国; 韩云博
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-10-27
Filing date: 2018-02-09
Publication date: 2022-02-11
Also published as: WO2019080839A1; CN114040476A; CN114040476B

Abstract

The application discloses a method, equipment and a system for transmitting downlink control information, which are used for solving the problem of high power consumption when user equipment detects the downlink control information sent to the user equipment by a base station. The method comprises the following steps: the method comprises the steps that user equipment receives first indication information sent by a base station in set resources of a PDCCH resource region; judging whether DCI used for scheduling data is detected in a PDCCH resource region in a transmission period or not according to the first indication information; if the first indication information indicates that the DCI used for scheduling data is not detected in the PDCCH resource region in the transmission period, the user equipment does not detect the DCI used for scheduling data in the PDCCH resource region in the transmission period; when the first indication information is the first DCI, the first indication information includes an indication bit table for indicating whether each user equipment in a user equipment group where the user equipment is located detects the corresponding DCI for scheduling data in the PDCCH resource region in the transmission cycle.

Description

Method, equipment and system for transmitting downlink control information

The application requires the priority of Chinese patent application with the application number of 201711056899.9 and the invention name of 'a downlink data transmission method and equipment' submitted by the Chinese patent office in 2017, 10 months and 27 days;

the present application is a division of a chinese patent application filed on 2018, 2, 9, under the name of 201810136994.8, entitled "a method, device, and system for transmitting downlink control information", the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of information technologies, and in particular, to a method, a device, and a system for transmitting downlink control information.

Background

In Long Term Evolution (LTE), a Physical Downlink Control Channel (PDCCH) is used to transmit Downlink Control Information (DCI) transmitted by a base station to a UE. One piece of DCI is transmitted in one PDCCH, the PDCCH is transmitted in a PDCCH resource region, the PDCCH resource region includes a plurality of Control Channel Elements (CCEs), a Base Station (BS) selects to transmit the DCI on 1 CCE, 2 CCEs, 4 CCEs, or 8 CCEs according to the size of the DCI and the required transmission reliability, and the number of CCEs used by one PDCCH is referred to as Aggregation Level (AL).

In order to improve resource utilization, in LTE, each UE is not configured with fixed PDCCH resources, so the UE does not know indefinitely which specific resource location any of its DCI will be transmitted on, and the UE must search for DCI (which may be referred to as target DCI, and may have one or more target DCIs) that may exist or that it expects itself within a certain resource range, which is referred to as a search space. The PDCCH resource region contains the common search space CSS and the UE-specific search space USS. The resource location of the CSS is fixed. The USS is determined according to a radio network temporary identity C-RNTI and a subframe number of the UE, and the USSs of different UEs may be partially overlapped or even completely overlapped.

In LTE, a PDCCH resource region contains numerous PDCCH resource elements, CCEs. The BS selects to transmit DCI on 1 CCE, 2 CCEs, 4 CCEs, or 8 CCEs according to the size of DCI and the required transmission reliability, i.e., one PDCCH may contain 1, 2, 4, or 8 CCEs. The number of CCEs used by one PDCCH is called aggregation level AL, e.g. AL equals 1 when 1 CCE is used and AL equals 4 when 4 CCEs are used. For the same DCI, the greater the AL value used for transmission, the higher the reliability, and of course, the more resources are occupied. When the BS transmits the DCI to the UE, the BS determines an AL value to be used according to the situation, and determines an appropriate position in the USS of the UE to transmit the DCI by combining the transmission situation of the DCI of other UEs. Part of the DCI with a smaller number of bits may also be transmitted in the CSS. If one DCI is transmitted in CSS, AL is 4 or 8 only. As such, the UE needs to try to receive its DCI at different locations in the USS, possibly even in the CSS, when receiving the DCI, and may need to try at each possible AL value, which is called a search.

One DCI includes payload (payload) of the DCI at the time of transmission, i.e., valid information and a scrambled CRC code. The CRC code is 16-bit information generated by calculating the payload using a CRC algorithm, and is used by the receiving end to check whether the received information is correct. The CRC code is scrambled with a 16-bit RNTI (specifically an exclusive-or operation) associated with the DCI, and the DCI is then encoded and rate-matched for transmission on the PDCCH (which may occupy 1 CCE or 2 CCEs, etc. depending on the AL). After receiving a PDCCH, the UE needs to detect which DCI is transmitted on the PDCCH, and then needs to know the size (size) of the payload of the target DCI to be detected, i.e., the number of bits, and input the size to a decoder, and the decoder outputs the decoded result according to the input size. The decoded result comprises a payload of the DCI and a scrambled CRC code, the UE calculates the CRC code for the payload part, the calculated CRC code is scrambled by using the RNTI corresponding to the target DCI, then the scrambled CRC code is compared with the scrambled CRC code in the decoded result, if the two codes are equal (or matched), the target DCI is received, if the two codes are not equal, if another target DCI with the same payload size as the target DCI but different RNTIs is required to be detected, the RNTI corresponding to the other target DCI is used for detecting whether the decoded result is the other target DCI. If the scrambled CRC codes in the decoding result cannot be matched after all RNTIs corresponding to the target DCIs with the same payload size are tried, if DCIs with other payload sizes need to be detected, a new payload size needs to be input into the decoder again for decoding again, and the actions are repeated. Different DCI payload sizes are attempted for one PDCCH, and this process is called blind detection. Each blind detection is subjected to a decoding process, and the decoding process has large calculation amount and consumes much electric quantity. In order to receive DCI expected by the UE or detect DCI which may appear at any time, the UE may perform blind detection at different locations in the search space using different ALs, and may need a large number of blind detection times to receive a target DCI, or may not receive a target DCI after the maximum blind detection times are exhausted. In the USS for the UE specified in LTE, if there are 6 PDCCH candidates for

AL

1 and 2, and 2 PDCCH candidates for

AL

4 and 8, respectively, the maximum blind detection number for detecting one target DCI is 6+6+2+2, which is 16 times, and if it is considered that the target DCI may be transmitted in the CSS, the blind detection number is increased.

DCI refers to downlink control information, which is transmitted by the BS and received by the UE. The content in the DCI may be control information for controlling uplink data transmission or control information for controlling downlink data transmission. The DCI for controlling uplink data transmission is referred to as uplink DCI, and the DCI for controlling downlink data transmission is referred to as downlink DCI.

Generally, when a UE needs to send uplink data to a BS, the UE first sends a resource request to the BS, then the BS sends uplink DCI to the UE to allocate resources required for uplink data transmission to the UE, and then the UE transmits uplink data on the allocated uplink data channel resources. If the BS sends downlink data to the UE, the BS firstly sends downlink DCI to the UE, indicates downlink data channel resources to the UE, and then the UE receives the downlink data on the indicated downlink data channel resources.

Since the uplink DCI is triggered by the UE, for example, the BS is triggered to transmit the uplink DCI after the UE transmits a resource request, the UE can always know when to receive the expected uplink DCI according to the protocol.

Since the downlink DCI is initiated by the BS, the UE cannot know when the downlink DCI transmitted to the UE is available in a certain way, and therefore if the UE needs to receive the downlink data transmitted to the UE from the base station in time, the UE has to monitor whether the downlink DCI is available in each transmission period (for example, a subframe with a duration of 1 ms), and when there is no downlink DCI in fact, the maximum blind detection times are always exhausted, which wastes a lot of electric energy. In order to save power for the UE, the LTE uses DRX technology, i.e. discontinuous reception, and the UE tries to receive downlink DCI at intervals according to the specification of the BS, for example, every ten transmission cycles (10 subframes, i.e. 10 milliseconds) or one thousand transmission cycles (1000 subframes, i.e. 1 second), so as to save power for the UE. Although DRX can achieve the purpose of saving power for the UE, downlink data cannot reach the UE in time.

In summary, in order to detect the downlink DCI transmitted by the base station to the UE itself, the UE needs to perform blind detection on the downlink DCI at different positions in the PDCCH resource region according to different aggregation levels of the PDCCH and using different DCI payload sizes, the blind detection process itself consumes more power, and after the maximum blind detection times are exhausted, the downlink DCI transmitted by the base station to the UE itself may not be detected, which wastes more power.

Disclosure of Invention

The application provides a method and a device for transmitting downlink control information, which are used for solving the problem of high power consumption when user equipment detects downlink control information DCI (downlink control information) sent to the user equipment by a base station in the prior art.

In a first aspect, the present application provides a method for transmitting downlink control information, where the method includes: a base station sends first indication information to user equipment in a set resource of a Physical Downlink Control Channel (PDCCH) resource region in a transmission period, wherein the first indication information is used for indicating whether Downlink Control Information (DCI) corresponding to the user equipment exists in the PDCCH resource region in the transmission period; the user equipment judges whether the DCI exists in the PDCCH resource region in the transmission period or not according to the first indication information; if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the base station sends the DCI to the user equipment in a search space of the user equipment in the PDCCH resource region in the transmission period, and then the user equipment detects the DCI in a search space corresponding to the user equipment in the PDCCH resource region in the transmission period; if the first indication information indicates that the DCI does not exist in the PDCCH resource region in the transmission period, the UE does not detect the DCI in the PDCCH resource region in the transmission period.

By the method, the user equipment determines whether the DCI of the user equipment exists in the PDCCH resource region in a transmission period according to the received first indication information sent by the base station in the transmission period, and if the first indication information indicates that the DCI of the user equipment does not exist in the PDCCH resource region in the transmission period, the user equipment does not need to detect the DCI of the user equipment in the PDCCH resource region in the transmission period, wherein the user equipment can receive the first indication information sent by the base station in multiple ways with lower cost, for example, the user equipment receives the first indication information in an explicit detection way or receives the first indication information with fewer blind detection times. The base station sends the first indication information to the user equipment in the set resources of the PDCCH resource region, so that the user equipment can definitely detect the first indication information in the set resources, the cost is low, whether the DCI corresponding to the user equipment exists in the PDCCH resource region in the transmission period is known through the indication of the first indication information, and whether the DCI needs to be detected is determined.

In one possible design, the base station sends, in the transmission cycle, a first DCI to a user equipment in a set resource of the PDCCH resource region, where the first DCI includes an indication bit table for indicating whether a corresponding DCI exists in the PDCCH resource region in the transmission cycle for each user equipment in a user equipment group in which the user equipment is located, and at least one bit in the indication bit table is used to indicate whether the DCI of the user equipment exists in the PDCCH resource region in the transmission cycle.

By the method, the first DCI can simultaneously indicate whether a plurality of user equipment detect the DCI in the PDCCH resource region in the transmission period, so that the resource for transmitting the first DCI is saved.

In a possible design, the ue determines whether the DCI exists in the PDCCH resource region in the transmission period according to the first indication information, and may determine whether the DCI exists in the PDCCH resource region in the transmission period according to at least one bit corresponding to the ue in the indication bit table in the transmission period.

By the method, the user equipment can judge whether the DCI is detected in the PDCCH resource region in the transmission period according to at least one bit corresponding to the user equipment in the indication bit table, and the user equipment and the bit in the indication bit table have a set corresponding relation, so that the judgment accuracy is improved.

In a possible design, the set resource includes a common search space, or a group common search space corresponding to a user equipment group in which the user equipment is located, or a fixed transmission resource corresponding to the user equipment group in which the user equipment is located.

In a possible design, if the value of the at least one bit is a first setting value, the ue determines that the DCI exists in the PDCCH resource region in the transmission period; if the value of at least one bit of the at least one bit is a second setting value, the ue determines that the DCI does not exist in the PDCCH resource region in the transmission period.

In a possible design, the indication bit table included in the first DCI is an indication bit table of a user equipment group where the user equipment is located, or is a compressed indication bit table of the user equipment group where the user equipment is located, where the compressed indication bit table is obtained by compressing the indication bit table of the user equipment group.

By the method, the bits of the indication bit table in the first DCI can be fully utilized, and the waste of the bits is avoided.

In a possible design, the base station may send first configuration information to the ue, and the ue receives the first configuration information sent by the base station, where the first configuration information includes a public radio network temporary identifier G-RNTI corresponding to the ue group and an intra-group identifier of the ue in the ue group, where the G-RNTI is used for the ue to identify a received DCI as a first DCI corresponding to the ue group where the ue is located, and the intra-group identifier is used for the ue to determine a bit corresponding to the ue in an indication bit table of the ue group.

In a possible design, the base station may further send second configuration information to the ue, and the ue receives the second configuration information sent by the base station, where the second configuration information includes an indicator radio network temporary identifier I-RNTI, a group identifier of a ue group where the ue is located, and an intra-group identifier of the ue in the ue group, where the I-RNTI is used for the ue to identify that the received DCI is the first DCI, the group identifier is used to determine whether the received DCI is the first DCI corresponding to the ue group, and the intra-group identifier is used for the ue to determine a bit corresponding to the ue in the first DCI.

In one possible design, the base station may further send, in the transmission period, at least 1-bit information to the user equipment in the set resource of the PDCCH resource region, and then the user equipment receives, in the transmission period, at least 1-bit information sent by the base station in the set resource of the PDCCH resource region, where the at least 1-bit information is used to indicate whether downlink control information DCI of the user equipment exists in the PDCCH resource region in the transmission period, and each bit information included in the at least 1-bit information may be transmitted independently.

By the method, at least 1-bit information indicating whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period is independently transmitted, so that whether the user equipment needs to detect the DCI in the PDCCH resource region in the transmission period can be rapidly indicated.

In a possible design, the ue may determine at least one bit information corresponding to the ue from the at least one bit information, and determine whether the DCI exists in the PDCCH resource region in the transmission period according to the at least one bit corresponding to the ue.

In a possible design, if values of at least 1-bit information corresponding to the user equipment are all third setting values, the user equipment may determine that the DCI exists in the PDCCH resource region in the transmission period; if the value of at least one bit contained in the at least 1-bit information corresponding to the user equipment is a fourth setting value, the user equipment determines that the DCI does not exist in the PDCCH resource region in the transmission period.

In one possible design, the set resource includes a fixed transmission resource corresponding to the ue.

In a possible design, the base station may further send third configuration information to the ue, where the third configuration information includes a correspondence between at least one resource location and the ue, and each resource location is used for transmitting 1 bit of information in the at least 1 bit of information.

In a second aspect, the present application provides a user equipment, which includes a transceiver unit and a processing unit, where the transceiver unit and the processing unit may be implemented by hardware or by corresponding logic function modules. The transceiver unit and the processing unit may implement, through interworking, the method procedures performed by the user equipment in any one of the possible designs of the first aspect and the first aspect thereof.

In one possible design, the transceiver unit may refer to circuits such as a codec and a modem in a baseband processing module in the user equipment, and the processing unit may refer to a processor in the baseband processing module in the user equipment; alternatively, the transceiver unit may refer to a baseband processing module in the user equipment, and the processing unit is an application processor outside the baseband processing module.

In a third aspect, the present application provides a base station, including a transceiver unit, where the transceiver unit may be implemented by hardware or by a corresponding logic function module. The transceiver unit may implement the method procedures performed by the base station in any of the possible designs of the second aspect and its second aspect described above. A processor and a memory, the memory for storing a software program, the processor for reading the software program stored in the memory and implementing the method provided by the first aspect, any of the designs of the first aspect, the second aspect, and any of the designs of the second aspect.

In a fifth aspect, the present application further provides a computer readable storage medium storing computer software instructions for performing the functions of any of the first aspect and the first aspect described above, including a program designed to perform the method of any of the first aspect, the second aspect, and the second aspect described above.

In a sixth aspect, an embodiment of the present application further provides an apparatus, connected to the memory, for reading and executing a software program stored in the memory to implement the method of the first aspect or any one of the designs of the first aspect, the second aspect, and any one of the designs of the second aspect, where the apparatus is a chip or a chip system.

In a seventh aspect, an embodiment of the present application further provides a system, which includes an application

In a fourth aspect, an embodiment of the present application further provides an apparatus, including

A user equipment of the first aspect or any of the above-mentioned first aspects and a base station implementing the second aspect and any of the second aspects.

The present application further provides any of the following embodiments:

1. a downlink data transmission method is used for user equipment, and the method comprises the following steps:

the user equipment receives first indication information sent by a base station, wherein the first indication information is used for indicating whether downlink control information (downlink DCI) about downlink data transmission of the user equipment exists or not;

if the first indication information indicates that no downlink DCI exists, the user equipment does not detect the downlink DCI; or the like, or, alternatively,

if the first indication information indicates that downlink DCI exists, the user equipment receives the downlink DCI of the user equipment through blind detection, and if the downlink DCI of the user equipment is detected, downlink data sent to the user equipment by the base station is received according to control information in the downlink DCI.

The user equipment can receive the first indication information sent by the base station in multiple ways with less cost, for example, the first indication information is received in a clear detection mode or in a few blind detection times. Under the condition that downlink DCI does not exist in most transmission periods, the method can obviously reduce the frequency of blind detection of the downlink DCI by the user equipment, and achieves the purpose of power saving.

The first indication information, the downlink DCI and the downlink data are transmitted in the same transmission period, and the user equipment receives the first indication information in each transmission period.

The control information in the downlink DCI includes resource allocation information and transmission rate information for transmitting the downlink data.

The downlink DCI is one of DCIs, and refers to DCI related to downlink data transmission, that is, DCI for scheduling downlink data transmission.

2. According to the method of method 1, the receiving, by the ue, the first indication information specifically includes:

the user equipment receives indicator downlink control information I-DCI corresponding to a user equipment group where the user equipment is located, wherein the I-DCI is used for indicating whether downlink DCI exists in each user equipment in the user equipment group, the I-DCI comprises an indication bit table, bits corresponding to the user equipment in the indication bit table carry the first indication information, the first indication information takes a first value to indicate that the downlink DCI exists, and the first indication information takes a second value to indicate that no downlink DCI exists.

The I-DCI can be transmitted by using a fixed aggregation level, and the search range is smaller, or the I-DCI is transmitted in a fixed position, so that the frequency of blind detection of the I-DCI by the user equipment is reduced or no blind detection is carried out.

The I-DCI may be an existing group common DCI, which also includes other information related to the user equipment group.

The indication bit table included in the I-DCI may be an original indication bit table, and the user equipment may directly obtain bits corresponding to the user equipment from the original indication bit table. If the indication bit table included in the I-DCI may also be a compressed indication bit table, the ue needs to expand the compressed indication bit table into an original indication bit table, and then obtains a bit corresponding to the ue from the original indication bit table.

The I-DCI can also contain compressed first indication information to indicate whether an indication bit table contained in the I-DCI is an original indication bit table or a compressed indication bit table.

The I-DCI may be referred to as a first DCI, or may be referred to by other names as long as the functions thereof are the same.

3. According to the method of method 2, before the ue receives the first indication information sent by the base station, the method further includes:

the UE receives first configuration information sent by the base station, wherein the first configuration information comprises configuration information of at least one UE group where the UE is located, the configuration information of the UE group at least comprises a public radio network temporary identifier (G-RNTI) of the UE group and an in-group device identifier of the UE in the UE group, the G-RNTI is used for identifying the received DCI as an I-DCI corresponding to the UE group, and the in-group device identifier is used for determining bits corresponding to the UE from the indication bit table; or the like, or, alternatively,

the user equipment receives second configuration information sent by the base station, wherein the second configuration information comprises an indicator radio network temporary identifier I-RNTI and at least one user equipment group configuration information where the user equipment is located, the I-RNTI is used for the user equipment to identify the received DCI as I-DCI, the one user equipment group configuration information comprises at least a brief group identification of the one user equipment group and an in-group device identification of the user equipment within the one user equipment group, the I-DCI also comprises a group identification field, the user equipment determines whether the received I-DCI is the I-DCI corresponding to the user equipment group according to the value of the group identification field, the inter-group device identifier is used for the user equipment to determine a bit corresponding to the user equipment from an indication bit table contained in the received I-DCI.

The indication bit table may be an original indication bit table or a compressed indication bit table, and if the indication bit table is a compressed indication bit table, when the user equipment determines a bit corresponding to the user equipment from the indication bit table according to the in-group device identifier, the user equipment needs to first expand the compressed indication bit table into the original indication bit table, and then determines the bit corresponding to the user equipment from the original indication bit table according to the in-group device identifier.

The G-RNTI is used for the user equipment to identify that the received DCI is the I-DCI corresponding to the user equipment group, specifically, the user equipment detects a scrambled CRC code of the received DCI using the G-RNTI, and if the received DCI is matched with the scrambled CRC code, the received DCI is the I-DCI corresponding to the user equipment group.

The I-RNTI is used for the user equipment to identify that the received DCI is I-DCI, specifically, the user equipment detects a scrambled CRC code of the received DCI by using the I-RNTI, and if the received DCI is matched with the scrambled CRC code, the received DCI is the I-DCI.

4. According to the method of method 1, the receiving, by the ue, the first indication information specifically includes:

the user equipment receives downlink control information I-DCI of an indicator corresponding to a user equipment group where the user equipment is located, the I-DCI comprises a bloom filter, the bloom filter comprises M bits, M is larger than 1, the first indication information occupies K bits in the bloom filter, K is larger than 1 and smaller than M, the K bits all take a first value to indicate that downlink DCI exists, and any one bit in the K bits takes a second value to indicate that no downlink DCI exists.

The I-DCI can be transmitted by using a fixed aggregation level, and the search range is smaller, or the I-DCI is transmitted in a fixed position, so that the user equipment reduces the number of blind detection of the I-DCI or does not need blind detection.

The I-DCI may be an existing group common DCI in the prior art, which further includes other information related to a user equipment group.

The number of user equipments included in the user equipment group corresponding to the I-DCI is greater than the number of bits in the bloom filter, and any two user equipments in the user equipment group may share 1 to K bits in the bloom filter.

5. According to the method of method 4, before the ue receives the first indication information sent by the base station, the method further includes:

the user equipment receives third configuration information sent by the base station, wherein the third configuration information comprises configuration information of at least one user equipment group where the user equipment is located, the configuration information of the user equipment group at least comprises a public radio network temporary identifier (G-RNTI) and K bit position information of the user equipment group, the G-RNTI is used for the user equipment to identify the received DCI as I-DCI corresponding to the user equipment group, and the K bit position information is used for the user equipment to obtain K bits corresponding to the user equipment from a bloom filter contained in the received I-DCI; or the like, or, alternatively,

the user equipment receives fourth configuration information sent by the base station, wherein the fourth configuration information includes an indicator radio network temporary identifier (I-RNTI) and at least one user equipment group configuration information where the user equipment is located, the I-RNTI is used for identifying that the received DCI is I-DCI, the user equipment group configuration information at least includes a user equipment group identifier and K bit position information, the I-DCI further includes a group identifier field, the user equipment determines that the received I-DCI is the I-DCI corresponding to the user equipment group according to the group identifier field, and the K bit position information is used for the user equipment to obtain K bits corresponding to the user equipment from a bloom filter included in the received I-DCI.

Specific uses of the G-RNTI and the I-RNTI can be referred to the description in the method 3.

6. According to the method of method 1, the receiving, by the ue, the first indication information specifically includes:

the first indication information is one-bit information, the user equipment receives the first indication information sent by the base station on a physical downlink indication channel corresponding to the user equipment, the first indication information takes a first value to indicate that downlink DCI exists, and the first indication information takes a second value to indicate that no downlink DCI exists.

7. The method of method 6, before the ue receives the first indication information sent by the base station, further comprising:

the user equipment receives fifth configuration information sent by the base station, wherein the fifth configuration information comprises time-frequency resources and code domain resources of the physical downlink indication channel; or the like, or, alternatively,

the user equipment receives sixth configuration information sent by the base station, wherein the sixth configuration information comprises code domain resource information and first calculation parameter information of the physical downlink indication channel, and the user equipment calculates and obtains time-frequency resources of the physical downlink indication channel according to the first calculation parameter information; or the like, or, alternatively,

and the user equipment receives second calculation parameter information sent by the base station, and calculates and obtains time-frequency resource and code domain resource information of the physical downlink indication channel according to the second calculation parameter information.

The first calculation parameter information may include a calculation factor of the user equipment, and the user equipment may specifically calculate and obtain the time-frequency resource of the physical downlink indicator channel according to the first calculation parameter information, where the user equipment calculates and obtains the time-frequency resource of the physical downlink indicator channel according to the calculation result and information such as the radio network temporary identifier RNTI of the user equipment.

The second calculation parameter information may specifically include a radio network temporary identifier RNTI of the user equipment, and the like.

8. According to the method of method 1, the receiving, by the ue, the first indication information specifically includes:

the first indication information is K bits of information, where K is greater than 1, the user equipment receives the first indication information sent by the base station in K physical downlink indication channels corresponding to the user equipment, each physical downlink indication channel in the K physical downlink indication channels transmits 1 bit of information, each bit in the first indication information is represented by a first value to indicate that downlink DCI exists, and any bit in the first indication information is represented by a second value to indicate that no downlink DCI exists.

9. According to the method of method 8, before the ue receives the first indication information sent by the base station, the method further includes:

the user equipment receives seventh configuration information sent by the base station, wherein the seventh configuration information comprises time-frequency resources and code domain resource information of the K physical downlink indication channels; or the like, or, alternatively,

the user equipment receives eighth configuration information sent by the base station, wherein the eighth configuration information comprises code domain resource information and third calculation parameter information of the K physical downlink indication channels, and the user equipment calculates and obtains time-frequency resources of the K physical downlink indication channels according to the third calculation parameter information; or the like, or, alternatively,

and the user equipment receives fourth calculation parameter information sent by the base station, and calculates and obtains time-frequency resources and code domain resource information of the K physical downlink indication channels according to the fourth calculation parameter information.

With regard to the third calculation parameter, reference may be made to the first calculation parameter described in method 7.

With regard to the fourth calculation parameter, reference may be made to the second calculation parameter described in method 7.

10. A downlink data transmission method is used for a base station, and the method comprises the following steps:

the base station sends first indication information to first user equipment, wherein the first indication information is used for indicating whether downlink control information (namely downlink DCI) about downlink data transmission of the first user equipment exists or not, so that the first user equipment determines whether blind detection of the downlink DCI is needed or not according to the first indication information;

if the first indication information indicates that downlink DCI exists, the base station further sends the downlink DCI and downlink data to the first user equipment, and the downlink DCI contains control information for controlling the transmission of the downlink data.

The base station may send the first indication information to the first user equipment in multiple manners with a low cost, for example, sending the first indication information on a fixed resource enables the first user equipment to receive the first indication information in a clear detection manner, or enables the first user equipment to send the first indication information in a manner that the first indication information is received by the first user equipment with a small number of blind detections. Under the condition that the downlink DCI of the first user equipment does not exist in most transmission periods, the method can obviously reduce the frequency of blind detection of the downlink DCI by the first user equipment, and achieves the purpose of saving electricity for the first user equipment.

The first indication information, the downlink DCI and the downlink data are transmitted in the same transmission period, and the base station sends the first indication information in each transmission period.

11. According to the method of method 10, the sending, by the base station, the first indication information to the first user equipment specifically includes:

the base station sends indicator downlink control information I-DCI to a user equipment group where the first user equipment is located, wherein the I-DCI comprises an indication bit table, a bit corresponding to the first user equipment in the indication bit table carries the first indication information, the first indication information takes a first value to indicate that downlink DCI exists, and the first indication information takes a second value to indicate that no downlink DCI exists.

The I-DCI can be transmitted by using a fixed aggregation level, and the search range is smaller, or the I-DCI is transmitted in a fixed position, so that the frequency of blind detection of the I-DCI by the first user equipment is reduced or the blind detection of the first user equipment is not needed.

The I-DCI may be an existing group common DCI, which further includes other information related to a user equipment group in which the first user equipment is located.

The indication bit table included in the I-DCI may be an original indication bit table, where each bit in the original indication bit table corresponds to one user equipment, and then the first user equipment may directly obtain a bit corresponding to itself from the indication bit table in the I-DCI. The indication bit table included in the I-DCI may also be a compressed indication bit table, and the compressed indication bit table is obtained by compressing according to the original indication bit table, so that the first user equipment needs to expand the compressed indication bit table into the original indication bit table, and then obtain a bit corresponding to the first user equipment from the original indication bit table.

12. According to the method of method 11, before the base station sends the first indication information to the first user equipment, the method further includes:

the base station sends first configuration information to the first user equipment, wherein the first configuration information comprises configuration information of at least one user equipment group where the first user equipment is located, the configuration information of the user equipment group at least comprises a public radio network temporary identifier (G-RNTI) of the user equipment group and an in-group device identifier of the first user equipment in the user equipment group, the G-RNTI is used for identifying DCI sent by the base station as I-DCI corresponding to the user equipment group, and the in-group device identifier is used for determining bits corresponding to the first user equipment in the I-DCI corresponding to the user equipment group; or the like, or, alternatively,

the base station sends second configuration information to the first user equipment, wherein the second configuration information comprises an indicator radio network temporary identifier (I-RNTI) and configuration information of at least one user equipment group where the first user equipment is located, the I-RNTI is used for identifying the DCI sent by the base station as I-DCI, the one user equipment group configuration information comprises at least a group identity of the one user equipment group and an in-group device identity of the first user equipment within the one user equipment group, the I-DCI also comprises a group identification field, the value of the group identification field indicates that the I-DCI sent by the base station is the I-DCI corresponding to the user equipment group, the in-group device identifier is used to determine a bit corresponding to the first user equipment in an indication bit table included in the I-DCI corresponding to the user equipment group.

The indication bit table may be an original indication bit table or a compressed indication bit table, and if the indication bit table is a compressed indication bit table, the in-group device identifier is used to determine a bit corresponding to the first user device in the indication bit table included in the I-DCI corresponding to the user device group, the base station generates the original indication bit table, the in-group device identifier of the first user device corresponds to a corresponding bit in the original indication bit table, and the base station compresses the original bit table to obtain a compressed indication bit table included in the I-DCI.

The G-RNTI is used to identify that the DCI sent by the base station is the I-DCI corresponding to the user equipment group, specifically, the base station scrambles a CRC code in the I-DCI sent by using the G-RNTI, so that the I-DCI sent by the base station is the I-DCI corresponding to the user equipment group.

The I-RNTI is used for identifying that the DCI sent by the base station is the I-DCI, specifically, the base station scrambles a CRC code of the I-DCI sent by the I-RNTI, so that the DCI sent by the base station is identified to be the I-DCI.

13. According to the method of method 10, the sending, by the base station, the first indication information to the first user equipment specifically includes:

the base station sends downlink control information I-DCI of an indicator corresponding to a user equipment group where the first user equipment is located to the first user equipment, wherein the I-DCI comprises a bloom filter, the bloom filter comprises M bits, M is larger than 1, the first indication information occupies K bits in the bloom filter, K is larger than 1 and smaller than M, the K bits are all provided with first values to indicate that downlink DCI exists, and any bit in the K bits is provided with a second value to indicate that no downlink DCI exists.

The I-DCI can be transmitted by using a fixed aggregation level, and the search range is smaller, or the I-DCI is transmitted in a fixed position, so that the first user equipment reduces the blind detection times of the I-DCI or does not perform the blind detection.

The number of user equipments included in the user equipment group corresponding to the I-DCI is greater than the number of bits in the bloom filter, and any two user equipments in the first user equipment group may share 1 to K bits in the bloom filter.

14. According to the method of method 13, before the base station sends the first indication information to the first user equipment, the method further includes:

the base station sends third configuration information to the first user equipment, wherein the third configuration information comprises configuration information of at least one user equipment group where the first user equipment is located, the configuration information of the user equipment group at least comprises a public radio network temporary identifier (G-RNTI) and K bit position information of the user equipment group, the G-RNTI is used for identifying DCI (downlink control information) sent by the base station as I-DCI (inter-cell interference control) corresponding to the user equipment group, and the K bit position information is used for indicating K bits corresponding to the first user equipment in a bloom filter in the I-DCI corresponding to the user equipment group; or the like, or, alternatively,

the base station sends fourth configuration information to the first user equipment, wherein the fourth configuration information includes an indicator radio network temporary identifier (I-RNTI) and configuration information of at least one user equipment group where the first user equipment is located, the I-RNTI is used for identifying that DCI sent by the base station is I-DCI, the configuration information of the user equipment group at least comprises user equipment group identification and K bit position information, the I-DCI further comprises a group identification field, the value of the group identification field indicates that the I-DCI sent by the base station is the I-DCI corresponding to the user equipment group, and the K bit position information is used for indicating that the first user equipment corresponds to K bits in a bloom filter in the I-DCI corresponding to the user equipment group.

Specific uses of the G-RNTI and the I-RNTI can be referred to the description of the method 12.

15. According to the method of method 10, the sending, by the base station, the first indication information to the first user equipment specifically includes:

the first indication information is one-bit information, the base station sends the first indication information on a physical downlink indication channel corresponding to the first user equipment, the first indication information takes a first value to indicate that downlink DCI exists, and the first indication information takes a second value to indicate that no downlink DCI exists.

The first value may be referred to as a first set value, and the second value may be referred to as a second set value.

16. According to the method of method 15, before the base station sends the first indication information to the first user equipment, the method further includes:

the base station sends fifth configuration information to the first user equipment, wherein the fifth configuration information comprises time-frequency resource and code domain resource information of the physical downlink indication channel; or the like, or, alternatively,

the base station sends sixth configuration information to the first user equipment, wherein the sixth configuration information comprises code domain resource information of the physical downlink indication channel and first calculation parameter information, and the first calculation parameter information is used for determining time-frequency resources of the physical downlink indication channel; or the like, or, alternatively,

and the base station sends second calculation parameter information to the first user equipment, wherein the second calculation parameter information is used for determining time-frequency resources and code domain resources of the physical downlink indication channel.

The first calculation parameter information may include a calculation factor of the first user equipment, and the base station obtains a time-frequency resource of the physical downlink indicator channel by calculation according to the first calculation parameter information, the radio network temporary identifier RNTI of the first user equipment, and the like, or the base station determines the time-frequency resource of the physical downlink indicator channel first, and then calculates the calculation factor according to the time-frequency resource of the physical downlink indicator channel and the radio network temporary identifier RNTI of the first user equipment, and the like, so that the first user equipment can calculate the time-frequency resource of the physical downlink indicator channel according to the information such as the calculation factor and the like.

The second calculation parameter information may specifically include a radio network temporary identifier RNTI of the first user equipment, and the like.

17. According to the method of method 10, the sending, by the base station, the first indication information to the first user equipment specifically includes:

the first indication information is K bits of information, where K is greater than 1, the base station sends the first indication information on K physical downlink indication channels corresponding to the first user equipment, each physical downlink indication channel in the K physical downlink indication channels transmits 1 bit of information, each bit in the first indication information is represented by a first value to indicate that downlink DCI exists, and any bit in the first indication information is represented by a second value to indicate that no downlink DCI exists.

18. According to the method of method 17, before the base station sends the first indication information to the first user equipment, the method further includes:

the base station sends seventh configuration information to the first user equipment, wherein the seventh configuration information comprises time-frequency resources and code domain resource information of the K physical downlink indication channels; or the like, or, alternatively,

the base station sends eighth configuration information to the first user equipment, wherein the eighth configuration information comprises code domain resource information and third calculation parameter information of the K physical downlink indication channels, and the third calculation parameter information is used for determining time-frequency resources of the K physical downlink indication channels; or the like, or, alternatively,

and the base station sends fourth calculation parameter information to the first user equipment, wherein the fourth calculation parameter information is used for determining time-frequency resources and code domain resource information of the K physical downlink indication channels.

Reference may be made to the first calculation parameter described in method 16 in relation to the third calculation parameter.

Reference may be made to the second calculation parameter described in method 16 with respect to the fourth calculation parameter.

19. A user equipment, comprising:

a memory to store instructions;

and the processor is used for calling the instruction in the memory and executing the method of any one of the methods 1-9.

A base station, comprising:

a memory to store instructions;

a processor for calling the instruction in the memory to execute the method of any of the methods 10-18.

21. A user equipment, comprising: a processor, a memory and a wireless transceiver;

the wireless transceiver is used for receiving and transmitting data and realizing wireless communication with a base station;

the memory is to store instructions;

the processor is configured to execute the instructions in the memory to perform the method of any of methods 1-9.

22. A base station, comprising: a processor, a memory and a wireless transceiver;

the wireless transceiver is used for receiving and transmitting data and realizing wireless communication with user equipment;

the memory is to store instructions;

the processor is configured to execute the instructions in the memory to perform the method of any of methods 10-18.

23. A user equipment configured to perform the method of any of methods 1-9.

24. A base station configured to perform the method of any of methods 10-18.

25. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any of methods 1-9.

26. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any of the methods 10-18.

27. A computer program which, when executed on a computer, causes the computer to carry out the method of any of methods 1-9.

28. A computer program which, when executed on a computer, causes the computer to carry out the method of any of the methods 10-18.

29. A communication system comprising a user equipment according to any of the methods 1-9 and a base station according to any of the methods 10-18.

30. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method according to any one of claims 1 to 9.

31. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of any one of claims 10 to 18.

32. A chip, comprising: a processing module and a communication interface, the processing module for performing the method of any one of claims 1 to 9.

33. The chip of claim 32, further comprising a storage module (e.g., memory) for storing instructions, the processing module for executing the instructions stored by the storage module, and execution of the instructions stored in the storage module causes the processing module to perform the method of any one of claims 1 to 9.

34. A chip, comprising: a processing module and a communication interface, the processing module for performing the method of any one of claims 10 to 18.

35. The chip of claim 34, further comprising a storage module (e.g., memory) for storing instructions, the processing module for executing the instructions stored by the storage module, and execution of the instructions stored in the storage module causes the processing module to perform the method of any one of claims 10 to 18.

The numbers of the foregoing embodiments do not have explicit correspondences with the numbers of the following embodiments, and are for convenience of description only.

The present application also provides any of the following embodiments (the numbering of the embodiments in this section does not have an explicit correspondence to the numbering of the embodiments provided in other sections herein, but merely for convenience in this section):

1. a method of transmitting downlink control information, the method comprising:

the method comprises the steps that user equipment receives first indication information sent by a base station in set resources of a Physical Downlink Control Channel (PDCCH) resource region in a transmission period, wherein the first indication information is used for indicating whether Downlink Control Information (DCI) corresponding to the user equipment exists in the PDCCH resource region in the transmission period;

the user equipment judges whether the DCI exists in the PDCCH resource region in the transmission period or not according to the first indication information;

if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the UE detects the DCI in a search space corresponding to the UE in the PDCCH resource region in the transmission period;

if the first indication information indicates that the DCI does not exist in the PDCCH resource region in the transmission period, the UE does not detect the DCI in the PDCCH resource region in the transmission period.

2. The method according to embodiment 1, where the ue receives, in a transmission cycle, first indication information sent by a base station in a set resource of a PDCCH resource region, includes:

the user equipment receives, in the transmission cycle, a first DCI sent by a base station in a set resource of the PDCCH resource region, where the first DCI includes an indication bit table for indicating whether each user equipment in a user equipment group where the user equipment is located has a corresponding DCI in the PDCCH resource region in the transmission cycle, and at least one bit in the indication bit table is used to indicate whether the DCI of the user equipment exists in the PDCCH resource region in the transmission cycle.

3. The method according to embodiment 2, wherein the determining, by the user equipment, whether the DCI exists in the PDCCH resource region in the transmission period according to the first indication information includes:

and the user equipment judges whether the DCI exists in the PDCCH resource region in the transmission period according to at least one bit corresponding to the user equipment in the indication bit table in the transmission period.

4. The method according to any of embodiments 1-3, wherein the set resource includes a common search space, or a group common search space corresponding to a user equipment group in which the user equipment is located, or a fixed transmission resource corresponding to the user equipment group in which the user equipment is located.

5. The method according to embodiment 3, where the ue determines, in the transmission cycle, whether the DCI exists in the PDCCH resource region in the transmission cycle according to at least one bit in the indication bit table corresponding to the ue, specifically includes:

if the value of the at least one bit is a first set value, the UE determines that the DCI exists in the PDCCH resource region in the transmission period;

if the value of at least one bit of the at least one bit is a second setting value, the ue determines that the DCI does not exist in the PDCCH resource region in the transmission period.

6. The method according to any one of embodiments 2 to 5, wherein an indication bit table included in the first DCI is an indication bit table of a user equipment group in which the user equipment is located, or is a compressed indication bit table of the user equipment group in which the user equipment is located, where the compressed indication bit table is obtained by compressing the indication bit table of the user equipment group.

7. The method according to any of embodiments 2-6, before the ue receives the first indication information sent by the base station in the set resource of the PDCCH resource region in the transmission cycle, the method further includes:

the UE receives first configuration information sent by the base station, wherein the first configuration information comprises a public radio network temporary identifier (G-RNTI) corresponding to the UE group and an in-group identifier of the UE in the UE group, the G-RNTI is used for identifying the received DCI as the first DCI corresponding to the UE group where the UE is located by the UE, and the in-group identifier is used for determining a bit corresponding to the UE in an indicator bit table of the UE group by the UE.

8. The method according to any of embodiments 2-6, before the ue receives the first indication information sent by the base station in the set resource of the PDCCH resource region in the transmission cycle, the method further includes:

the user equipment receives second configuration information sent by the base station, wherein the second configuration information comprises an indicator radio network temporary identifier (I-RNTI), a group identifier of a user equipment group where the user equipment is located and an in-group identifier of the user equipment in the user equipment group, the I-RNTI is used for identifying the received DCI as the first DCI by the user equipment, the group identifier is used for determining whether the received DCI is the first DCI corresponding to the user equipment group, and the in-group identifier is used for determining a bit corresponding to the user equipment in the first DCI by the user equipment.

9. The method according to embodiment 1, where the ue receives, in a transmission cycle, first indication information sent by a base station in a set resource of a PDCCH resource region, includes:

the user equipment receives at least 1 bit of information sent by a base station in a set resource of a PDCCH resource region in the transmission period, wherein the at least 1 bit of information is used for indicating whether Downlink Control Information (DCI) of the user equipment exists in the PDCCH resource region in the transmission period, and each bit of information contained in the at least 1 bit of information is transmitted independently.

10. The method according to embodiment 9, wherein the determining, by the user equipment, whether the DCI exists in the PDCCH resource region in the transmission period according to the first indication information includes:

and the user equipment determines at least one bit message corresponding to the user equipment in the at least one bit message, and judges whether the DCI exists in the PDCCH resource region in the transmission period according to the at least one bit message corresponding to the user equipment.

11. The method according to embodiment 9 or 10, wherein the determining, according to at least one bit corresponding to the user equipment itself, whether the DCI exists in the PDCCH resource region in the transmission period specifically includes:

if the value of at least 1-bit information corresponding to the user equipment is a third set value, the user equipment determines that the DCI exists in the PDCCH resource region in the transmission period;

if the value of at least one bit contained in the at least 1-bit information corresponding to the user equipment is a fourth setting value, the user equipment determines that the DCI does not exist in the PDCCH resource region in the transmission period.

12. The method as in any embodiments 9-11, wherein the configured resources comprise fixed transmission resources corresponding to the ue.

13. The method according to any of embodiments 9-12, wherein before the ue receives at least 1-bit information sent by the base station in the set resource of the PDCCH resource region in the transmission period, the method further includes:

the ue receives third configuration information sent by the base station, where the third configuration information includes a correspondence between at least one resource location and the ue, and each resource location is used for transmitting 1 bit of information in the at least 1 bit of information.

14. A method of transmitting downlink control information, the method comprising:

a base station sends first indication information to user equipment in a set resource of a Physical Downlink Control Channel (PDCCH) resource region in a transmission period, wherein the first indication information is used for indicating whether Downlink Control Information (DCI) corresponding to the user equipment exists in the PDCCH resource region in the transmission period;

if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the base station sends the DCI to the user equipment in a search space of the user equipment in the PDCCH resource region in the transmission period.

15. The method in embodiment 14, where the base station sends the first indication information to the ue in the set resource of the PDCCH resource region in one transmission period, includes:

and the base station sends first DCI to user equipment in set resources of the PDCCH resource region in the transmission period, wherein the first DCI comprises an indication bit table used for indicating whether each user equipment in a user equipment group where the user equipment is located has corresponding DCI in the PDCCH resource region, and at least one bit in the indication bit table is used for indicating whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period.

16. The method according to embodiment 14 or 15, wherein the set resource includes a common search space, or a group common search space corresponding to a user equipment group in which the user equipment is located, or a fixed transmission resource corresponding to the user equipment group in which the user equipment is located.

17. The method of embodiment 15, wherein if the values of the at least one bit are all set to a first setting value, the first DCI indicates that the DCI of the user equipment exists in the PDCCH resource region in the transmission period; if the value of at least one bit of the at least one bit is a second setting value, the first DCI indicates that the DCI of the user equipment does not exist in the PDCCH resource region within the transmission period.

18. The method according to any one of embodiments 15 to 17, where an indication bit table included in the first DCI is an indication bit table of a user equipment group in which the user equipment is located, or is a compressed indication bit table of the user equipment group in which the user equipment is located, where the compressed indication bit table is obtained by compressing the indication bit table of the user equipment group.

19. The method according to embodiment 15, wherein before the base station sends the first indication information to the ue in the set resource of the PDCCH resource region in the transmission period, the method further includes:

the base station sends first configuration information to the user equipment, wherein the first configuration information comprises a public radio network temporary identifier (G-RNTI) corresponding to the user equipment group and an in-group identifier of the user equipment in the user equipment group, the G-RNTI is used for identifying the received DCI as the first DCI corresponding to the user equipment group where the user equipment is located by the user equipment, and the in-group identifier is used for determining a bit corresponding to the user equipment in an indication bit table of the user equipment group.

20. The method according to any one of embodiments 15-19, wherein before the base station sends the first indication information to the ue in the set resource of the PDCCH resource region in the transmission period, the method further includes:

the base station sends second configuration information to the user equipment, wherein the second configuration information comprises an indicator radio network temporary identifier (I-RNTI), a group identifier of a user equipment group where the user equipment is located and an in-group identifier of the user equipment in the user equipment group, the I-RNTI is used for identifying the received DCI as the first DCI by the user equipment, the group identifier is used for determining whether the received DCI is the first DCI corresponding to the user equipment group, and the in-group identifier is used for determining a bit corresponding to the user equipment in the first DCI by the user equipment.

21. The method in embodiment 14, where the base station sends the first indication information to the ue in the set resource of the PDCCH resource region in one transmission period, the method includes:

and the base station sends at least 1-bit information to user equipment in the set resources of the PDCCH resource region in the transmission period, wherein the at least 1-bit information is used for indicating whether Downlink Control Information (DCI) of the user equipment exists in the PDCCH resource region in the transmission period, and each bit information contained in the at least one bit information is independently transmitted.

22. The method of embodiment 21, wherein if the values of the at least 1-bit information are all third setting values, the at least 1-bit information indicates that the DCI exists in the PDCCH resource region in the transmission period; if the values of the at least 1-bit information are all fourth setting values, the at least 1-bit information indicates that the DCI does not exist in the PDCCH resource region in the transmission period.

23. The method according to embodiment 21 or 22, wherein the set resource includes a fixed transmission resource corresponding to the ue.

24. The method according to any one of embodiments 21-23, wherein before the base station sends at least 1-bit information to the ue in the set resource of the PDCCH resource region in the transmission period, the method further includes:

the base station sends third configuration information to the user equipment, where the third configuration information includes a correspondence between at least one resource location and the user equipment, and each resource location is used for transmitting 1 bit information of the at least 1 bit information.

25. A user equipment, the user equipment comprising:

a transceiving unit, configured to receive, in a transmission cycle, first indication information sent by a base station in a set resource of a physical downlink control channel PDCCH resource region, where the first indication information is used to indicate whether downlink control information DCI corresponding to a user equipment to which the transceiving unit belongs exists in the PDCCH resource region in the transmission cycle;

a processing unit, configured to determine whether the DCI exists in the PDCCH resource region in the transmission period according to the first indication information;

if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the transceiver unit detects the DCI in a search space corresponding to the user equipment in the PDCCH resource region in the transmission period;

if the first indication information indicates that the DCI does not exist in the PDCCH resource region in the transmission period, the transceiver unit does not detect the DCI in the PDCCH resource region in the transmission period.

26. The ue according to embodiment 25, wherein the transceiver unit is configured to receive, in one transmission cycle, first indication information sent by a base station in a set resource of a PDCCH resource region of a physical downlink control channel, and includes:

the transceiver unit is configured to:

receiving, in the transmission cycle, first DCI sent by a base station in set resources of the PDCCH resource region, where the first DCI includes an indication bit table, which is used to indicate whether each user equipment in a user equipment group where the user equipment is located has corresponding DCI in the PDCCH resource region in the transmission cycle, and at least one bit in the indication bit table is used to indicate whether DCI of the user equipment exists in the PDCCH resource region in the transmission cycle.

27. The user equipment of embodiment 25, the processing unit to:

and judging whether the DCI exists in the PDCCH resource region in the transmission period according to at least one bit corresponding to the user equipment in the indication bit table in the transmission period.

28. The ue according to any one of embodiments 25 to 27, wherein the set resource includes a common search space, or a group common search space corresponding to a ue group in which the ue is located, or a fixed transmission resource corresponding to the ue group in which the ue is located.

29. The ue according to embodiment 27, wherein the processing unit is specifically configured to:

if the value of the at least one bit is a first set value, determining that the DCI exists in the PDCCH resource region in the transmission period;

and if the value of at least one bit of the at least one bit is a second set value, determining that the DCI does not exist in the PDCCH resource region in the transmission period.

30. The ue according to any one of embodiments 26 to 29, wherein an indication bit table included in the first DCI is an indication bit table of a ue group in which the ue is located, or is a compressed indication bit table of the ue group in which the ue is located, where the compressed indication bit table is obtained by compressing the indication bit table of the ue group.

31. The user equipment as in any embodiments 26-30, the transceiver unit further configured to:

before first indication information sent by a base station in set resources of a PDCCH resource zone is received in the transmission period, first configuration information sent by the base station is received, wherein the first configuration information comprises a public radio network temporary identifier (G-RNTI) corresponding to a user equipment group and an in-group identifier of the user equipment in the user equipment group, the G-RNTI is used for identifying the received DCI as first DCI corresponding to the user equipment group where the user equipment is located by the user equipment, and the in-group identifier is used for determining a bit corresponding to the user equipment in an indication bit table of the user equipment group by the user equipment.

32. The user equipment as in any embodiments 26-30, the transceiver unit further configured to:

before first indication information sent by a base station in set resources of the PDCCH resource zone is received in the transmission period, second configuration information sent by the base station is received, wherein the second configuration information comprises an indicator radio network temporary identifier (I-RNTI), a group identifier of a user equipment group where the user equipment is located and an intra-group identifier of the user equipment in the user equipment group, the I-RNTI is used for the user equipment to identify the received DCI as the first DCI, the group identifier is used for determining whether the received DCI is the first DCI corresponding to the user equipment group, and the intra-group identifier is used for the user equipment to determine a bit corresponding to the user equipment in the first DCI.

33. The user equipment according to embodiment 25, wherein the transceiver unit is configured to:

receiving at least 1 bit of information sent by a base station in a set resource of a PDCCH resource region in the transmission period, wherein the at least 1 bit of information is used for indicating whether downlink control information DCI of the user equipment exists in the PDCCH resource region in the transmission period, and each bit of information contained in the at least 1 bit of information is transmitted independently.

34. The user equipment of embodiment 33, the processing unit to:

and determining at least one bit message corresponding to the user equipment in the at least one bit message, and judging whether the DCI exists in the PDCCH resource region in the transmission period according to the at least one bit message corresponding to the user equipment.

35. The ue according to embodiment 33 or 34, wherein the processing unit is specifically configured to:

if the value of at least 1-bit information corresponding to the user equipment is a third set value, determining that the DCI exists in the PDCCH resource region in the transmission period;

and if the value of at least one bit contained in the at least 1-bit information corresponding to the user equipment is a fourth set value, determining that the DCI does not exist in the PDCCH resource region in the transmission period.

36. The ue according to any of embodiments 33-35, wherein the configured resource comprises a fixed transmission resource corresponding to the ue.

37. The user equipment as in embodiments 33-36, the transceiver unit further configured to:

receiving third configuration information sent by the base station before receiving at least 1-bit information sent by the base station in a set resource of a PDCCH resource region in the transmission period, wherein the third configuration information comprises a corresponding relation between at least one resource position and the user equipment, and each resource position is used for transmitting 1-bit information of the at least 1-bit information.

38. A base station, the base station comprising:

a transceiving unit, configured to send first indication information to a user equipment in a set resource of a physical downlink control channel PDCCH resource region in a transmission period, where the first indication information is used to indicate whether a downlink control information DCI corresponding to the user equipment exists in the PDCCH resource region in the transmission period;

if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the transceiver unit is further configured to send the DCI to the user equipment in a search space of the user equipment in the PDCCH resource region in the transmission period.

39. The base station of embodiment 38, wherein the transceiver unit is configured to:

and in the transmission period, sending a first DCI to a user equipment in a set resource of the PDCCH resource region, where the first DCI includes an indication bit table for indicating whether each user equipment in a user equipment group where the user equipment is located has a corresponding DCI in the PDCCH resource region, and at least one bit in the indication bit table is used to indicate whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period.

40. The base station according to embodiment 38 or 39, wherein the set resource includes a common search space, or a group common search space corresponding to a user equipment group in which the user equipment is located, or a fixed transmission resource corresponding to the user equipment group in which the user equipment is located.

41. The base station according to embodiment 39, wherein if the values of the at least one bit are all set to a first setting value, the first DCI indicates that the DCI of the user equipment exists in the PDCCH resource region in the transmission period; if the value of at least one bit of the at least one bit is a second setting value, the first DCI indicates that the DCI of the user equipment does not exist in the PDCCH resource region within the transmission period.

42. The base station according to any of embodiments 39 to 41, wherein the indication bit table included in the first DCI is an indication bit table of a user equipment group in which the user equipment is located, or a compressed indication bit table of a user equipment group in which the user equipment is located.

43. The base station of embodiment 39, wherein the transceiver unit is further configured to:

before first indication information is sent to user equipment in set resources of the PDCCH resource region, sending first configuration information to the user equipment, wherein the first configuration information comprises a public radio network temporary identifier (G-RNTI) corresponding to the user equipment group and an in-group identifier of the user equipment in the user equipment group, the G-RNTI is used for identifying the received DCI as the first DCI corresponding to the user equipment group where the user equipment is located by the user equipment, and the in-group identifier is used for determining a bit corresponding to the user equipment in an indication bit table of the user equipment group by the user equipment.

44. The base station as in any of embodiments 39-43, wherein the transceiver unit is further configured to:

before first indication information is sent to user equipment in set resources of the PDCCH resource region, sending second configuration information to the user equipment, wherein the second configuration information comprises an indicator radio network temporary identifier (I-RNTI), a group identifier of a user equipment group where the user equipment is located and an intra-group identifier of the user equipment in the user equipment group, the I-RNTI is used for identifying the received DCI as the first DCI by the user equipment, the group identifier is used for determining whether the received DCI is the first DCI corresponding to the user equipment group, and the intra-group identifier is used for determining a bit corresponding to the user equipment in the first DCI by the user equipment.

45. The base station according to embodiment 38, wherein the transceiver unit is configured to send, in a transmission cycle, first indication information to the ue in a set resource of a PDCCH resource region, and the sending unit includes:

the transceiver unit is configured to:

and in the transmission period, sending at least 1-bit information to user equipment in a set resource of the PDCCH resource region, where the at least 1-bit information is used to indicate whether downlink control information DCI of the user equipment exists in the PDCCH resource region in the transmission period, and each bit information included in the at least one bit information is transmitted independently.

46. The base station according to embodiment 45, wherein if the values of the at least 1-bit information are all third setting values, the at least 1-bit information indicates that the DCI exists in the PDCCH resource region in the transmission period; if the values of the at least 1-bit information are all fourth setting values, the at least 1-bit information indicates that the DCI does not exist in the PDCCH resource region in the transmission period.

47. The base station as in embodiment 45 or 46, wherein the set resource includes a fixed transmission resource corresponding to the ue.

48. The base station according to any of embodiments 45-57, wherein the transceiver unit is further configured to:

before sending at least 1 bit of information to user equipment in set resources of the PDCCH resource region, sending third configuration information to the user equipment, wherein the third configuration information comprises a corresponding relation between at least one resource position and the user equipment, and each resource position is used for transmitting 1 bit of information in the at least 1 bit of information.

49. An apparatus comprising a processor, a memory, and a transceiver:

the memory is used for storing a software program;

the processor is configured to call and execute the software program stored in the memory, and to transmit and receive data through the transceiver to implement the method according to any one of embodiments 1 to 24.

50. A computer readable medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of embodiments 1 to 24.

51. An apparatus, the apparatus being connected to or having memory within the apparatus, the apparatus reading and executing a software program stored in the memory to implement a method as claimed in any one of embodiments 1 to 24.

52. The apparatus of embodiment 51, wherein the apparatus is a chip or a system of chips.

53. A system comprising a user equipment as claimed in any of method embodiments 1-13 and a base station as claimed in any of method embodiments 14-24.

54. A system, comprising a base station and a user equipment, comprising:

the base station is configured to send first indication information to the user equipment in a set resource of a physical downlink control channel PDCCH resource region in one transmission cycle, and the user equipment receives the first indication information sent by the base station in the set resource of the physical downlink control channel PDCCH resource region in the one transmission cycle, where the first indication information is used to indicate whether downlink control information DCI corresponding to the user equipment exists in the PDCCH resource region in the transmission cycle; the user equipment judges whether the DCI exists in the PDCCH resource region in the transmission period or not according to the first indication information;

if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the base station sends the DCI to the user equipment in a search space of the user equipment in the PDCCH resource region in the transmission period, and the user equipment detects the DCI in a search space corresponding to the user equipment in the PDCCH resource region in the transmission period;

Drawings

Fig. 1 is a schematic view of a wireless communication system scenario provided in the present application;

fig. 2 is a flowchart of a method for transmitting downlink control information according to the present application;

fig. 3 is a schematic diagram of a pdcch resource region provided in the present application;

FIG. 4 is an indication bit representation provided by the present application;

FIG. 5 is a schematic diagram of another exemplary indicator bit table provided herein;

FIG. 6 is a schematic representation of a bloom filter indication provided herein;

fig. 7 is a schematic diagram of another pdcch resource region provided in the present application;

FIG. 8 is a schematic view of a bloom filter provided herein;

fig. 9 is a schematic diagram of a user equipment device provided in the present application;

fig. 10 is a schematic diagram of a base station apparatus provided in the present application;

fig. 11 is a hardware configuration diagram of an apparatus provided in the present application.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application provides a method and a device for transmitting downlink control information, which are used for solving the problem in the prior art that power consumption is high when user equipment blindly detects downlink control information DCI sent to the user equipment by a base station. 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.

Hereinafter, some terms in the present application are explained to make the person skilled in the art understand.

1) A User Equipment (UE), also called a terminal device, a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device for providing voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), etc., where the UE in the present application may be a high-reliability low-latency communication (llc) UE.

2) A Base Station (BS) is a device in a network that accesses a terminal device to a wireless network. The network device is a node in a radio access network, and may also be referred to as a Radio Access Network (RAN) node (or device). Currently, some examples of network devices are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In addition, in a network structure, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure separates the protocol layers of the eNB in a Long Term Evolution (LTE) system, the functions of part of the protocol layers are controlled in the CU in a centralized way, the functions of the rest part or all of the protocol layers are distributed in the DU, and the CU controls the DU in a centralized way.

3) The transmission period in this application is a transmission period of the user equipment in an awake state of a connected state, or a transmission period of the user equipment in an idle state, and the duration of the transmission period in this application may be 10 ms.

4) The first indication information is used to indicate whether downlink control information corresponding to the user equipment exists in a PDCCH resource region in a transmission cycle, and the first indication information may be first DCI (also may be one of DCIs, and may also be referred to as indicator downlink control information I-DCI, and may also be referred to by other names), or may be at least one bit of information.

5) And the indication bit table comprises a plurality of bits, and at least one bit is used for indicating whether corresponding DCI exists in the PDCCH resource region in the transmission period of each user equipment in the user equipment group.

6) A Common Search Space (CSS) in which a plurality of user equipments may retrieve first indication information transmitted to the user equipment by a base station.

7) The first setting value is a binary number, and is used to instruct the ue to detect the DCI in a search space corresponding to the ue in the PDCCH resource region in the transmission period, where the specific value is 1 or 0, and is different from the second setting value.

8) And a second setting value, which is a binary number, for indicating that the user equipment does not detect the DCI in a search space corresponding to the user equipment in the PDCCH resource region in the transmission period, where the specific value is 0 or 1, and is different from the first setting value.

9) And a third setting value, which is a binary number, for instructing the ue to determine that the DCI is detected in the PDCCH resource region in the transmission period, where the specific value is 0 or 1, and is different from the fourth setting value.

10) And a fourth setting value, which is a binary number, for instructing the ue to determine that the DCI is not detected in the PDCCH resource region in the transmission period, where the specific value is 1 or 0, and is different from the third setting value.

11) The public radio network temporary identity (G-RNTI) represents RNTIs shared by a group of user equipment, and one G-RNTI corresponds to one user equipment group and is used for identifying that one I-DCI is the I-DCI corresponding to one UE group.

12) An indicator radio network temporary identity (I-RNTI) represents a radio network temporary identity of the I-DCI, where the I-RNTI may be referred to by other names, and is used for the ue to identify the received DCI as the first DCI.

13) A Physical Downlink Indicator Channel (PDICH) is used to indicate whether there is downlink data, and in this embodiment, the name is not limited as long as 1-bit information can be transmitted.

14) A physical hybrid-ARQ indicator channel (PHICH) indicates whether data transmitted from a transmitting side is correctly received with 1 bit.

15) Resource Element (RE), a minimum physical signal transmission unit formed by an Orthogonal Frequency Division Multiplexing (OFDM) symbol and a subcarrier.

16) Plural means two or more.

In addition, it is to be understood that the terms first, second, etc. in the description of the present application are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order.

Abbreviations and key term definitions referred to herein:

the present application may be applied to a scenario of a wireless communication system, where the scenario includes multiple BSs, each BS may provide a communication service for multiple UEs in a coverage area, a UE may move and may be in coverage areas of different BSs at different locations, and the BS may send downlink data to the UE, as specifically shown in fig. 1.

URLLC service in 5G:

currently, 3GPP is making 5G communication standards. The 5G is required to support the ultra-reliable low-delay URLLC service. URLLC traffic requires the UE or BS to complete data transmission in one direction within 0.5 milliseconds. For uplink transmission, the BS configures a shared uplink data transmission resource region, and once the UE has data transmission, the UE can randomly select one or more resource units in the shared uplink data transmission resource region for transmission, thereby achieving the purpose of low delay. For downlink data transmission, a conventional transmission method has to be adopted, that is, the BS first transmits a downlink DCI, indicates a transmission position of downlink data and other related parameters in the downlink DCI, and the UE first receives the downlink DCI and then receives the downlink data at a downlink data transmission resource position indicated in the downlink DCI. For low latency, the UE may not detect a downlink DCI by using the DRX technique at a time interval, but has to detect the downlink DCI every transmission cycle, so as to achieve the purpose of low latency. And to achieve low latency, this transmission period is shorter than a subframe (duration 1 ms) in LTE, e.g. one slot (half of a subframe), even only 2 OFDM symbols, and the shortest supported transmission period is 0.125 ms. A shorter transmission period means that downlink DCI is detected more frequently, which results in more power consumption by the UE. According to the foregoing description, multiple blind detections are required to detect downlink DCI, but the actual data volume of the URLLC service is not large, and data transmission is not frequent, which results in that the UE mostly exhausts the maximum blind detection times but does not receive downlink DCI, and consumes much power.

The following describes a scheme for transmitting downlink control information according to the present invention with reference to the accompanying drawings.

Referring to fig. 2, a flowchart of a method for transmitting downlink control information is provided in the present application. The method comprises the following steps:

step 201, the base station sends first indication information to the user equipment in a transmission period.

Step S202, the ue receives, in the transmission period, first indication information sent by the base station in a set resource of a PDCCH resource region of a physical downlink control channel, where the first indication information is used to indicate whether a downlink control information DCI corresponding to the ue exists in the PDCCH resource region in the transmission period. In an embodiment, the DCI corresponding to the user equipment, and the "DCI" mentioned below may refer to the downlink DCI described above.

Step S203, the ue determines whether the DCI exists in the PDCCH resource region in the transmission period according to the first indication information.

Step S2041, if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the ue detects the DCI in a search space corresponding to the ue in the PDCCH resource region in the transmission period.

Step S2042, if the first indication information indicates that the DCI does not exist in the PDCCH resource region in the transmission period, the ue does not detect the DCI in the PDCCH resource region in the transmission period.

By the method, the user equipment determines whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period according to the received first indication information sent by the base station in one transmission period, and if the first indication information indicates that the DCI of the user equipment does not exist in the PDCCH resource region in the transmission period, the user equipment does not need to detect the DCI of the user equipment in the PDCCH resource region in the transmission period, thereby reducing the blind detection times and reducing the power consumption.

In this embodiment of the application, when the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the base station also issues the DCI corresponding to the user equipment in the transmission period in which the first indication information is issued, that is, the first indication information, the DCI (that is, the DCI corresponding to the user equipment described herein, and specifically, the downlink DCI) and the downlink data, that is, these pieces of information are transmitted in the same transmission period, where the downlink data is data scheduled by the DCI.

In a possible implementation manner, the user equipment may receive the first indication information in each transmission period, so as to reduce an amount of power consumed by the user equipment for detecting the downlink DCI in each transmission period.

In the embodiment, the first indication information in step S201 is the first DCI or the at least one bit information, and the two cases are illustrated separately below.

In case one, the ue receives, in the transmission cycle, a first DCI sent by the base station in a set resource of the PDCCH resource region.

Specifically, the first DCI includes an indication bit table, configured to indicate whether each user equipment in a user equipment group where the user equipment is located has a corresponding DCI in the PDCCH resource region in the transmission period, where at least one bit in the indication bit table is used to indicate whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period, where the first DCI may also be referred to as I-DCI.

A schematic diagram of a pdcch resource region in a transmission period is shown in fig. 3, where 301 denotes the pdcch resource region in one transmission period, and 302 denotes a set resource region for transmitting I-DCI in the pdcch resource region, that is, a set resource region, where the set resource includes a common search space, or a group common search space corresponding to a ue group in which the ue is located, or a fixed transmission resource corresponding to the ue group in which the ue is located. 303 is a UE-specific search space (USS) of one UE, 304 is one I-DCI, and 305 indicates one downlink DCI. For example, after the UE receives an I-DCI 404 corresponding to a UE group where the UE is located in the set resource region 402, if the I-DCI 404 indicates that the UE has no downlink DCI, the UE does not need to blind-detect its downlink DCI in its USS 403. If the I-DCI 404 indicates that the UE has downlink DCI, the UE blindly detects its downlink DCI, i.e., DCI 405, in its USS 403. And if the UE detects the downlink DCI, receiving downlink data or acquiring configuration information in the downlink DCI according to the control information in the detected downlink DCI. In the embodiment of the present application, fig. 3 is only a schematic diagram and does not suggest the time-frequency domain information of the pdcch resource region and the location relationship between the I-DCI resource region and the pdcch resource region.

In this embodiment of the application, using at least one bit in the indication bit table to indicate whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period includes using one bit to indicate or using at least two bits to indicate two specific embodiments, which are specifically described below.

In a specific embodiment, a detailed description is given below by taking an example that one bit is used in an indication bit table to indicate whether a user equipment has the DCI of the user equipment in the PDCCH resource region in the transmission period.

The indication bit table is an indication bit table of a user equipment group where the user equipment is located, or a compressed indication bit table of the user equipment group where the user equipment is located. I.e. the indication bit table may be the original indication bit table of a group of user equipments comprising said user equipment, or may be a compressed indication bit table comprising a large group of user equipments.

When an indication bit table is an original indication bit table, the indication bit table is used to indicate a group of user equipments, where the group of user equipments includes 24 user equipments, and a schematic diagram of the indication bit table is shown in fig. 4, where each bit in the indication bit table corresponds to a set UE, and when a value of the bit is 1, it indicates that the user equipment corresponding to the bit has DCI in the PDCCH resource region in the transmission period, for example, a first bit in fig. 4 corresponds to UE1, and a value of the bit is 1, and indicates that UE1 has DCI in the PDCCH resource region in the transmission period. When the value of the bit is 0, it indicates that the UE corresponding to the bit does not have DCI in the PDCCH resource region in the transmission period, for example, the third bit in fig. 3 corresponds to UE3, and the value of the bit is 0, which indicates that UE3 does not have DCI in the PDCCH resource region in the transmission period, and so on, which is not repeated herein.

Before the user equipment receives a first DCI sent by a base station in set resources of the PDCCH resource region in the transmission period, the user equipment receives first configuration information sent by the base station, wherein the first configuration information comprises a public radio network temporary identifier (G-RNTI) corresponding to the user equipment group and an in-group identifier of the user equipment in the user equipment group, the G-RNTI is used for identifying the received DCI as the first DCI corresponding to the user equipment group where the user equipment is located by the user equipment, and the in-group identifier is used for determining a bit corresponding to the user equipment in an indication bit table of the user equipment group by the user equipment. In this embodiment of the present application, if the ue is included in multiple ue groups, the base station needs to send multiple G-RNTIs corresponding to the multiple ue groups where the ue is located to the ue. And the I-DCI corresponding to each user equipment group carries out scrambling Cyclic Redundancy Check (CRC) by using the G-RNTI of the group, when the user equipment searches the I-DCI in the set resources, the I-DCI is descrambled by adopting a plurality of pre-configured G-RNTIs, and the base station allocates an in-group equipment representation for each UE in the group, so that the BS and the UE determine the position of the bit corresponding to the UE in the indication table according to the in-group equipment identifier.

The in-group device identifier is substantially an index for indicating a position of a bit corresponding to the UE in the indication bit table. For example, when one UE group has 24 UEs at most, the value range of the in-group device identifier may be 0 to 23.

(ii) when one indication bit table is a compressed indication bit table, the indication bit table is used to indicate a large group of user equipments, the large group of user equipments includes more user equipments, for example, more than 24 user equipments, but since downlink data of each UE is sparse, the number of bits set to 1 in the indication bit table is usually much smaller than the number of bits taken to be 0, the indication bit table is compressible, as illustrated in fig. 5, the compressed indication bit table in one case is illustrated, and 3 minimum-sized user equipments are combined into one large group for compression, and the size of the indication bit table in the corresponding large group is unchanged, so the size of the I-DCI is unchanged. The size of the I-DCI is unchanged, multiple blind detections caused by different I-DCI sizes when the UE receives the I-DCI are avoided, and power consumption is reduced.

In the embodiment of the application, a group corresponding to the original indication bit table is called a group, a group combined by a plurality of groups corresponding to the compressed indication bit table is called a big group, and in order to facilitate the UE to determine whether the first indication information of the UE is in an I-DCI corresponding to the group or an I-DCI corresponding to the big group, the BS may send two G-RNTIs for each UE, one G-RNTI is used for descrambling the I-DCI corresponding to the small group, and the other G-RNTI is used for descrambling the I-DCI corresponding to the big group. For example, each group of the small group includes 24 UEs, each group of the large group includes 48 or 72 UEs, etc., which is not limited in the present invention.

Further, the BS may configure each UE in a plurality of UE groups of different sizes and transmit the G-RNTI of each UE group to the UE. When the UE receives the I-DCI, the size of the UE group corresponding to the I-DCI can be known according to the G-RNTI used by the received I-DCI, for example, the size of the UE group corresponding to the first G-RNTI is 24 UEs, the size of the UE group corresponding to the second G-RNTI is 48 UEs, and the size of the UE group corresponding to the third G-RNTI is 96 UEs. For example, suppose that the BS supports at most 96 UEs, and each UE is identified as 0 to 95, which may be referred to as a local short identifier. The BS may group 0 to 23 th UEs into a 1 st group, 24 to 47 th UEs into a 2 nd group, 48 to 71 th UEs into a 3 rd group, and 72 to 95 th UEs into a 4 th group. The 1 st group to the 4 th group are all minimum-scale UE groups, the original indicating bit table length required by each group is 24 bits, and each UE group corresponds to one G-RNTI. The BS further combines the UEs of group 1 and group 2 into group 5, and group 3 and group 4 into group 6, and may further combine group 1 and group 3 into group 7, combine group 2 and group 4 into group 8, combine group 1 and group 4 into group 9, and combine group 2 and group 3 into group 10. The 5 th group to the 10 th group are all larger groups, and each also has a G-RNTI. When the BS transmits the I-DCI, the BS may respectively transmit 4 total I-DCI corresponding to the 1 st group to the 4 th group, or transmit 3 total I-DCI corresponding to the 1 st group, the 2 nd group, and the 6 th group, or 2 total I-DCI corresponding to the 7 th group and the 8 th group, which is not limited in the present invention. The indication bit tables transmitted in the I-DCI corresponding to the 1 st group to the 4 th group are original indication bit tables, the indication bit tables transmitted in the I-DCI corresponding to the 5 th group to the 10 th group are compression indication bit tables, and the compression indication bit tables are not more than 24 bits. The BS can also put all the UEs in one group to be determined as the 11 th group, and if the indication bit table corresponding to 96 UEs can be compressed to be not more than 24 bits, the BS only transmits the I-DCI corresponding to the 11 th group. After receiving an I-DCI, if the I-DCI contains a compressed indication bit table, the UE should first expand the compressed indication bit table into an original indication bit table, locate its own bit in the original indication bit table according to its own in-group device identifier in the UE group corresponding to the I-DCI, and determine whether there is downlink DCI or not according to its own bit value.

In order to support one UE in multiple UE groups with different sizes, only one I-RNTI may be used to scramble the CRC code of all I-DCI, and a group number field is included in the I-DCI to indicate the group number corresponding to the I-DCI, for example, the group number is the group 1 or group 2 or group 5 in the above specific example, and so on. After the UE successfully receives the I-DCI using the I-RNTI, the size of the original indication bit table and whether the I-DCI is transmitted through the original indication bit table or the compressed indication bit table can be known according to the group number indicated by the group number field, for example, if the I-DCI is the above-mentioned group 1, the indication bit table transmitted through the corresponding I-DCI is the original indication bit table, and if the I-DCI is the above-mentioned group 5 or group 11, the indication bit table transmitted through the corresponding I-DCI is the compressed indication bit table. In the embodiment of the application, the I-DCI corresponding to the large UE group is sent as far as possible, so that the number of the I-DCI in one transmission period is reduced, and system resources are saved.

In the embodiment of the application, the I-DCI may include a compression mode field indicating the compression mode of the indication bit table, and the BS may adopt different compression modes according to the distribution of the bits of the first setting value in the original indication bit table, so that the compression result may be transmitted within the size defined by the I-DCI, and use the compression mode field to indicate the compression mode. For example, the I-DCI always includes a compression mode field, and when the value is 0, it indicates that the original indication bit table is transmitted in the I-DCI, and when the value is other values, it indicates that the compression indication bit table and the specific compression mode are transmitted in the I-DCI. If the compression mode field only has 1 bit, only the original indication bit table or the compression indication bit table is transmitted in the I-DCI, and the compression mode is fixed. Or, the compression mode field is not present in the I-DCI containing the original indication bit table, and one of the compression modes can be indicated by a small number of bits in the I-DCI containing the compression indication bit table, for example, 2 bits are used to indicate 4 compression modes, and the compression indication bit table does not exceed 22 bits. The compression mode field may be considered as part of the compression indication bit table, and the compression indication bit table does not exceed 24 bits.

In the embodiment of the application, the number of the UEs in one UE group is not limited, the mode of compressing the indication bit table is not limited, and a stroke compression mode or a head and tail pinching compression mode may be adopted.

In a possible implementation manner, the BS may allocate each UE to one UE group, and the indication bit table does not use a compression manner, so that the BS only needs to send the G-RNTI plus the in-group device identifier or the I-RNTI plus the group number plus the in-group device identifier to the UE. If the BS does not group the UEs, the configuration information sent by the BS to the UEs needs to include the I-RNTI and the BS local short identifier of the UE, and immediately notify the UE of the size information of the I-DCI, because the change of the number of the UEs affects the length of the indication bit table. How the BS transmits the configuration information of the UE to the UE is not limited in the present invention.

In one possible implementation, when one UE only relates to one UE group, the BS may specify a fixed transmission position of I-DCI corresponding to the UE group, and the UE may receive its corresponding I-DCI without blind detection. When one UE relates to a plurality of UE groups, the BS can not transmit the I-DCI at the position of determined resources, and the UE needs to blindly detect the I-DCI within a certain resource range.

For example, suppose that UE1 and UE2 are respectively in two different groups, but are in a large group at the same time, if the group where UE1 is located and the group where UE2 is located both have more UEs with downlink DCI, the bits of the first set value in the original indicator bit table of the large group are as much as the bits of the second set value, and the distribution is relatively uniform, which results in being unable to be compressed, and the indicator bit table of the large group cannot be transmitted in one I-DCI, then the BS can only send the I-DCI corresponding to the two groups. If the group where UE1 is located and the group where UE2 is located both have less or no downlink DCI for the UE, or a large number of UEs have downlink DCI (bits of the first setting value or the second setting value in one bit table occupy an absolute majority, and the indication bit table can be compressed), or the distribution of the UEs having downlink DCI is not uniform, and the UEs are concentrated in a certain zone, so that the original indication bit table corresponding to the large group can be compressed to a small enough value to be transmitted in one I-DCI, the BS sends the I-DCI corresponding to the large group where UE1 and UE2 are located together, and then does not need to send two I-DCIs.

When the UE sends the I-DCI, a higher Aggregation Level (AL) is used, so that the transmission reliability is improved. For example, AL may be 4 or 8, and the higher the value of AL, the higher the transmission reliability of I-DCI. In addition, one AL value is used, the UE can be prevented from blindly detecting the I-DCI on different AL values, the frequency of blindly detecting the I-DCI by the UE is reduced, and the power saving of the UE is facilitated.

The second embodiment,

In the following, taking an example that at least two bits are used in an indication bit table to indicate whether a user equipment has the DCI of the user equipment in the PDCCH resource region in the transmission period, where one mode is bloom filter indication, specifically as follows.

In this embodiment, the I-DCI carries a bloom filter (bloom filter), where the bloom filter includes multiple bits, one UE corresponds to K bits in the bloom filter, K is at least 2, and 1 to multiple bits of any two bits corresponding to the UE may be the same, but the K bits corresponding to two UEs are not completely the same in general, as shown in fig. 6. Assuming that the initial value of each bit in the bloom filter is a second set value, for example, "0", the first bit and the second bit are used to indicate UE1, and both the first bit and the first bit have a value of 1, so that there is DCI corresponding to UE1 in the PDCCH resource region in the transmission period. The second bit and the third bit are used to indicate UE2, and the third bit is bit 0, so there is no DCI corresponding to UE2 in the PDCCH resource region in the transmission period. The first bit and the third bit are used to indicate UE3, and the third bit is 0, so there is no downlink DCI corresponding to UE2 in the PDCCH resource region in the transmission period. Fig. 6 is only one specific example of a bloom filter.

If one UE has downlink DCI, the BS sets all K bits corresponding to the UE to a first setting value, e.g., "1". When a UE receives I-DCI, it finds that K bits in its corresponding bloom filter are all the first setting value, it is considered that there is downlink DCI, but according to the characteristics of the bloom filter, this may be a false indication, and there may not be downlink DCI corresponding to the UE actually, but when any one bit of the K bits corresponding to one UE takes the second setting value, the UE certainly does not have downlink DCI. Considering that the UE has less downlink DCI, that is, the UE does not have downlink DCI in most transmission periods, the feature of the bloom filter is utilized to ensure that the UE does not miss the downlink DCI which appears irregularly, and the downlink DCI does not need to be detected in most cases, thereby reducing power consumption.

The BS may divide the UEs into multiple groups, with one bloom filter for each UE group. With the bloom filter, each UE group may contain more UEs, and the bit required by the bloom filter is less, for example, each UE group contains 48 or 72 UEs, and the bloom filter has only 24 bits, and 48 or 72 UEs are indicated by 24 bits, which may save system resources.

And in case two, the user equipment receives at least 1 bit of information sent by the base station in the set resource of the PDCCH resource region in the transmission period.

Specifically, the at least 1-bit information is used to indicate whether downlink control information DCI of the ue exists in the PDCCH resource region in the transmission period, each bit information included in the at least 1-bit information is transmitted independently, a set resource of the PDCCH resource region may be a PDICH resource region, the 1-bit information may be transmitted using one PDICH resource, and the set resource includes a fixed transmission resource corresponding to the ue.

Fig. 7 shows another schematic diagram of a pdcch resource region in a transmission period, where 701 denotes the pdcch resource region in a transmission period, 702 denotes a PDICH resource region included in the pdcch resource region, 703 denotes a USS of a UE, 704 denotes a PDICH resource of the UE, and 705 denotes a downlink DCI. The pdcch resource region 701 is only a part of the total transmission resources in a transmission period, and other uplink control channel resource regions, uplink data transmission resource regions, or downlink data transmission resource regions that may exist are not shown. The pdcch resource region 701 may include 1 or more OFDM symbols in the time domain and may include the entire carrier or a part of the carrier in the frequency domain. The shape of the pdcch resource region 701 shown in fig. 7 does not imply any meaning in the frequency domain or the time domain, and only represents one block of radio resources. The location of the PDICH resource region 702 in the pdcch resource region 701 shown in fig. 7 does not indicate the actual location of the PDICH resource region 702 in the pdcch resource region 701, but only indicates that the PDICH resource region 702 is a part of the pdcch resource region 701. The position of the USS shown in fig. 7 is only an example, the actual position should be calculated according to a prescribed calculation formula, and the invention is not limited to how the USS is calculated. The location of the PDICH shown in fig. 7 is only illustrative, and the actual location should be determined computationally according to a prescribed calculation formula, or according to the configuration of the BS.

In a possible implementation manner, before the ue receives at least 1 bit of information sent by the base station in set resources of a PDCCH resource region in the transmission period, the ue receives third configuration information sent by the base station, where the third configuration information includes a correspondence between at least one resource location and the ue, and each resource location is used for transmitting 1 bit of information.

In this embodiment of the present application, the indicating whether the DCI of the user equipment exists in the PDCCH resource region in the transmission period using at least 1 bit information includes using 1 bit information indication or using at least two bit information indications, and the two specific implementations are specifically described below.

In a third embodiment, a detailed description is given below by taking an example that one bit information is used to indicate whether a user equipment has the DCI of the user equipment in the PDCCH resource region in the transmission period.

If the value of at least 1-bit information corresponding to the user equipment is a third set value, the user equipment judges that the DCI is detected in the PDCCH resource region in the transmission period according to the at least 1-bit information, wherein the third set value can be 1 or 0 and is different from a fourth set value; if the value of at least one bit in the at least 1-bit information corresponding to the user equipment is a fourth setting value, the user equipment determines, according to the at least 1-bit information, that the DCI is not detected in the PDCCH resource region in the transmission period, where the fourth setting value may be 0 or 1, and is different from the third setting value.

In the embodiment of the application, one PDICH occupies few transmission resources, as long as 1-bit information can be transmitted, the transmission of the PDICH in the embodiment of the application can adopt a transmission technology of PHICHs in LTE in the prior art, each 8 PHICHs in LTE occupy 12 resource elements REs to form a PHICH group, different PHICHs in the same PHICH group adopt Walsh code sequences to orthogonally superimpose signals, each PHICH occupies 1.5 REs on average, and the signals of each PHICH are distributed on the 12 REs. Other techniques may be used for transmission of the PDICH, such as exclusive use of one or two REs per PDICH, etc. The present invention does not limit the specific transmission mode of the PDICH.

One PDICH resource is a resource occupied by one PDICH, and by using the existing transmission technology, 8 PDICH groups form one PDICH group to jointly occupy 12 REs, where each PDICH uses a different Walsh code sequence, and one PDICH resource refers to the 12 occupied REs and the used Walsh code sequence.

The PDICH resource region may be located in a specific region of a BS-designated or system-defined physical downlink control channel resource region. The position of the PDICH resource corresponding to each UE in the PDICH resource region may be explicitly configured by the BS, or may be calculated according to a formula, specifically, calculated using a cell radio network temporary identifier (cell RNTI, C-RNTI) of the UE, or calculated using the C-RNTI of the UE and the ID number of the transmission cycle. When the transmission period is a subframe, the ID number of the transmission period is the subframe number (for example, one subframe includes 2 slots). When a transmission period is a slot (e.g., a slot contains 14 OFDM symbols), the ID number of the transmission period is the slot number. The transmission period may be a period smaller than a slot, for example, 2 OFDM symbols, which may be referred to as a minislot, and the ID number of the transmission period is the minislot number. The BS may also configure each UE with a different calculation factor for calculating the location of the PDICH of the UE so that the calculated location of the PDICH differs for each UE. The Walsh code sequence used by the UE can be configured by the BS or can be calculated according to a formula.

When the method of calculating the location of the PDICH resource is implemented by using the formula, the calculation formula may be:

IPDICH＝(AUE*(NC-RNTI+P)*Q)mod NPDICH

wherein, the IPDICH represents an index number of the PDICH of the UE in a plurality of PDICH resources included in the PDICH resource region. Each PDICH resource corresponds to an index number, the index number of the PDICH resource determines corresponding time-frequency resource and walsh code sequence, AUE represents a calculation factor related to UE configured by the BS for the UE, the calculation factor is configured by the BS and can not be used, NC-RNTI represents a value of C-RNTI of the UE, P is a prime number and can not be used, Q is another prime number and can not be used, and the three values of AUE, P and Q are used for better distributing calculation results so that IPDICHs of the UEs are different as much as possible. Different UEs have the same IPDICH and may affect the power saving effect of the UE, that is, multiple UEs may share one PDICH resource, and for multiple UEs sharing the PDICH resource, if only one UE has downlink DCI, the UE determines that the UE has downlink DCI with other UEs using the same PDICH resource, and then goes to its USS to try to receive the downlink DCI, and finally, the UE does not receive the downlink DCI, but wastes power once, and thus no error action is generated. NPDICH denotes the number of PDICH resources included in the PDICH resource region, and for example, assuming that the PDICH resource region includes 24 REs, the PDICH resource region includes 2 PDICH groups, i.e., 16 PDICH resources. Mod denotes modulo division.

In this embodiment, the Walsh code sequences corresponding to the UE may also be calculated by using the above formula, and NPDICH in the formula may be converted into the number of Walsh code sequences.

In one possible implementation, since the PDICH resource corresponding to the UE is determined, the UE may receive the PDICH without blind detection and may receive information of an explicit information amount on an explicit resource. And the PDICH only contains 1 bit of information, and the energy consumption required for receiving the PDICH is far less than that required for blind detection of the DCI once.

In a fourth embodiment, a detailed description is given below by taking an example that at least two bits of information are used to indicate whether a user equipment has the DCI of the user equipment in the PDCCH resource region in the transmission period, where one mode is bloom filter indication.

The present embodiment uses bloom filter (bloom filter) technology in combination with the PDICH to reduce the amount of resources occupied by PDICH resource regions. With respect to the bloom filter, as described in the second embodiment, assuming that the PDICH resource region includes M PDICH resources, i.e., M bits of information can be transmitted, the M bits can be organized into one bloom filter, i.e., the BS transmits each bit in the bloom filter in the corresponding PDICH. Each UE indicates whether there is downlink DCI using K bits in the bloom filter, that is, the UE receives K corresponding pdiscs each period, when all bits in the K pdiscs have a third setting value, for example, "1", it indicates that the UE may have downlink DCI, and when at least one bit in the K bits is a fourth setting value, for example, "0", then the UE must have no downlink DCI. Using the bloom filter, M bits may be used to indicate whether each UE of more than M UEs has downlink DCI, which reduces the amount of resources occupied by the PDICH resource region.

The use of the specific bloom filter is illustrated in fig. 8, where each small box in fig. 8 represents 1-bit information carried by one PDICH, bit information carried by multiple PDICH together form one bit string, and the technique for transmitting PDICH may adopt the technique described in the third embodiment where a PDICH resource region includes 24 REs, so that 16 PDICH resources are shared, that is, 16-bit information may be transmitted, and fig. 8 only shows 10-bit information as an illustration. In fig. 8, indicator bits of UE1 are

bits

0 and 2, indicator bits of UE2 are

bits

2 and 6, indicator bits of UE3 are

bits

6 and 8, and indicator bits of UE4 are

bits

0 and 6. UE1 and UE4 share bit 0, UE1 and UE2 share bit 2, and UE2 and UE4 share bit 6. The BS indicates that UE1 and UE2 have downlink DCI, so

bits

0, 2, and 6 in the bloom filter are set to the third setting "1", and the other bits are set to the fourth setting "0". UE1, UE2, and UE4 all detect that their indicator bits are "1", and both consider that they have DCI, where UE1 and UE2 will detect their downlink DCI, and since UE4 and UE1 and UE2 share a bit, in fact, UE4 does not have DCI corresponding to the UE in the PDCCH resource region in the transmission period, UE4 cannot detect its DCI, which is a false indication. The false indication only causes the UE which is indicated by the false indication not to realize power saving once, and other negative effects can not be generated. When the UE3 detects that the 2 indicator bits are not all "1", it is determined that there is no downlink DCI, and downlink DCI cannot be detected, thereby reducing energy consumption.

In this embodiment of the present application, the positions of K bits in the bloom filter corresponding to one UE may be configured by the BS, or may be calculated according to a set formula, for example, when K is 2, the following formula may be constructed with reference to the formula described in the third embodiment:

IPDICH1＝(AUE*(NC-RNTI+P1)*Q)mod NPDICH

IPDICH2＝(AUE*(NC-RNTI+P2)*Q)mod NPDICH

wherein IPDICH1 and IPDICH2 indicate two PDICH resources corresponding to the UE, i.e. corresponding to two bits in the bloom filter. P1 and P2 are different primitives used to compute the two bit positions of the UE. In order to calculate 2 different bit positions corresponding to one UE, AUE or Q in the formula may also be set to be different. In this embodiment, Walsh code sequences corresponding to multiple PDICH resources of the UE may be calculated in a similar manner, which is specifically referred to in the third embodiment.

In the embodiment of the application, a plurality of PDICH transmission bloom filters are used, each PDICH transmits one bit in the bloom filter, each UE corresponds to a plurality of bits in the bloom filter, that is, a plurality of PDICH, and the UE determines whether to blindly detect the downlink DCI according to the plurality of bits corresponding to the UE in the bloom filter, so that system resources can be saved.

Based on the same inventive concept as the method embodiment, the present application further provides a user equipment schematic diagram, as shown in fig. 9, including a transceiver 901, configured to receive, in a transmission cycle, first indication information sent by a base station in a set resource of a physical downlink control channel PDCCH resource region, where the first indication information is used to indicate whether a downlink control information DCI corresponding to a user equipment to which the transceiver belongs exists in the PDCCH resource region in the transmission cycle; a processing unit 902, configured to determine, according to the first indication information, whether to detect the DCI in the PDCCH resource region in the transmission period; if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the transceiver unit detects the DCI in a search space corresponding to the user equipment in the PDCCH resource region in the transmission period; if the first indication information indicates that the DCI does not exist in the PDCCH resource region in the transmission period, the transceiver unit does not detect the DCI in the PDCCH resource region in the transmission period.

Based on the same inventive concept as the method embodiment, the present application further provides a base station schematic diagram, as shown in fig. 10, including a transceiver unit 1001, configured to send first indication information to a user equipment in a set resource of a PDCCH resource region of a physical downlink control channel in a transmission period, where the first indication information is used to indicate whether a downlink control information DCI corresponding to the user equipment exists in the PDCCH resource region in the transmission period; if the first indication information indicates that the DCI exists in the PDCCH resource region in the transmission period, the transceiver unit sends the DCI to the user equipment in a search space of the user equipment in the PDCCH resource region in the transmission period; a processing unit 1002, configured to control the transceiver unit to send the first indication information and the DCI.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Where the integrated module may be implemented in hardware, as shown in fig. 11, an apparatus may include a processor 1102. The hardware of the entity corresponding to the

processing units

902 and 1002 may be the processor 1102. The processor 1102 may be a Central Processing Unit (CPU), a digital processing module, or the like. The device may further include a communication interface 1101 (which may be a transceiver), and the hardware entity corresponding to the

transceiver units

901 and 1001 may be the communication interface 1101. The apparatus may further include: a memory 1103 for storing programs executed by the processor 1102. The memory 1103 may be a nonvolatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), and may also be a volatile memory, such as a random-access memory (RAM). The memory 1103 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

The processor 1102 is configured to execute the program code stored in the memory 1103, and is specifically configured to execute the method according to the embodiment shown in fig. 2. Reference may be made to the method described in the embodiment shown in fig. 2, which is not described herein again.

In the embodiment of the present application, a specific connection medium between the communication interface 1101, the processor 1102, and the memory 1103 is not limited. In the embodiment of the present application, the memory 1103, the processor 1102, and the communication interface 1101 are connected by a bus 1104 in fig. 11, the bus is indicated by a thick line in fig. 11, and the connection manner between other components is merely illustrative and not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.

The embodiment of the present invention further provides a computer-readable storage medium, which is used for storing computer software instructions required to be executed for executing the processor, and which contains a program required to be executed for executing the processor.

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, 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, 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.

It should also be understood that the reference herein to first, second, and various numerical designations is merely a convenient division to describe and is not intended to limit the scope of the present application.

In the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to 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 present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for transmitting downlink control information, the method comprising:

the method comprises the steps that user equipment receives first indication information sent by a base station in set resources of a Physical Downlink Control Channel (PDCCH) resource region, wherein the first indication information is used for indicating whether control information (DCI) which is used for scheduling data and corresponds to the user equipment is detected in the PDCCH resource region in a transmission period; the set resource comprises a common search space;

the user equipment judges whether the DCI used for scheduling data is detected in the PDCCH resource region in the transmission period or not according to the first indication information;

if the first indication information indicates that the DCI for the scheduling data is not detected in the PDCCH resource region in the transmission period, the UE does not detect the DCI for the scheduling data in the PDCCH resource region in the transmission period;

when the first indication information is first DCI, the first indication information includes an indication bit table, which is used to indicate whether each user equipment in a user equipment group where the user equipment is located detects the corresponding DCI for scheduling data in the PDCCH resource region in the transmission cycle.

2. The method of claim 1, wherein the determining, by the user equipment, whether to detect the DCI for scheduling data in the PDCCH resource region in the transmission period according to the first indication information comprises:

and the user equipment judges whether the DCI used for scheduling data is detected in the PDCCH resource region in the transmission period according to at least one bit corresponding to the user equipment in the indication bit table.

3. The method of claim 2, wherein the determining, by the ue, whether to detect the DCI for scheduling data according to at least one bit corresponding to the ue in the indicator bit table comprises:

if the value of at least one bit corresponding to the user equipment is a first set value, the user equipment determines that the DCI for scheduling data is detected in the PDCCH resource region within a transmission period;

and if the value of at least one bit in at least one bit corresponding to the user equipment is a second set value, the user equipment determines that the DCI for scheduling data is not detected in the PDCCH resource region in a transmission period.

4. The method of any one of claims 1 to 3, further comprising:

if the first indication information indicates that the DCI for scheduling data is detected in the PDCCH resource region in a transmission cycle, the UE detects the DCI for scheduling data in the PDCCH resource region in the transmission cycle.

5. The method according to any one of claims 1 to 4, wherein before the UE receives the first indication information sent by the base station, the method further comprises:

the UE receives first configuration information sent by the base station, wherein the first configuration information comprises a public radio network temporary identifier corresponding to the UE group and an intra-group identifier of the UE in the UE group, the public radio network temporary identifier is used for identifying that the received DCI is the first DCI corresponding to the UE group where the UE is located by the UE, and the intra-group identifier is used for determining a bit corresponding to the UE in an indication bit table of the UE group.

6. The method of any one of claims 1 to 4, wherein before the UE receives the first indication information sent by the base station, the method further comprises:

the ue receives second configuration information sent by the base station, where the second configuration information includes an indicator radio network temporary identifier, a group identifier of a ue group where the ue is located, and an intra-group identifier of the ue in the ue group, where the indicator radio network temporary identifier is used for the ue to identify that the received DCI is the first DCI, the group identifier is used to determine whether the received DCI is the first DCI corresponding to the ue group, and the intra-group identifier is used for the ue to determine a bit corresponding to the ue in the first DCI.

7. The method of any one of claims 1 to 4, wherein the receiving, by the UE, the first indication information sent by the base station in the set resource of the PDCCH resource region comprises:

the user equipment receives at least 1-bit information sent by a base station in a set resource of the PDCCH resource region, wherein the at least 1-bit information is used for indicating whether DCI (downlink control information) which is corresponding to the user equipment and is used for scheduling data is detected in the PDCCH resource region in the transmission period, and each bit information contained in the at least 1-bit information is independently transmitted;

after the user equipment receives the first indication information sent by the base station, the method further includes:

and the user equipment determines at least one bit message corresponding to the user equipment in the at least one bit message, and judges whether the DCI for scheduling data is detected in the PDCCH resource region in the transmission period according to the at least one bit message corresponding to the user equipment.

8. The method of claim 7, wherein before the UE receives at least 1-bit information transmitted by the base station in the set resources of the PDCCH resource region, the method further comprises:

9. The method of any one of claims 1 to 8, further comprising:

the first indication information and the DCI for scheduling data are transmitted in the same transmission period;

and the transmission cycle is a time interval corresponding to the WUS duration window of the wakeup service.

10. A method for transmitting downlink control information, the method comprising:

a base station sends first indication information to user equipment in set resources of a Physical Downlink Control Channel (PDCCH) resource region, wherein the first indication information is used for indicating whether control information (DCI) which is corresponding to the user equipment and is used for scheduling data is detected in the PDCCH resource region in a transmission period; the set resource comprises a common search space;

if the first indication information indicates that the DCI for scheduling data is not detected in the PDCCH resource region in the transmission period, the base station does not send the DCI to the user equipment in the PDCCH resource region in the transmission period;

11. The method of claim 10, wherein at least one bit in the indication bit table is used to indicate whether to detect the DCI for scheduling data for the user equipment.

12. The method of claim 11, wherein if the values of the at least one bit are all first set values, the first indication information indicates detection of the DCI for scheduling data for the user equipment; if the value of at least one bit of the at least one bit is a second setting value, the first indication information indicates not to detect the DCI for scheduling data of the user equipment.

13. The method of any one of claims 10 to 12, further comprising:

if the first indication information indicates that the DCI for scheduling data is detected in the PDCCH resource region in a transmission period, the base station sends the DCI to the user equipment in the PDCCH resource region in the transmission period.

14. The method of any one of claims 10 to 13, wherein before the base station sends the first indication information to the user equipment, the method further comprises:

the base station sends first configuration information to the user equipment, wherein the first configuration information comprises a public radio network temporary identifier corresponding to the user equipment group and an intra-group identifier of the user equipment in the user equipment group, the public radio network temporary identifier is used for identifying that the received DCI is the first DCI corresponding to the user equipment group where the user equipment is located by the user equipment, and the intra-group identifier is used for determining a bit corresponding to the user equipment in an indication bit table of the user equipment group by the user equipment.

15. The method of any one of claims 10 to 13, wherein before the base station sends the first indication information to the user equipment, the method further comprises:

the base station sends second configuration information to the user equipment, wherein the second configuration information includes an indicator radio network temporary identifier, a group identifier of a user equipment group where the user equipment is located, and an intra-group identifier of the user equipment in the user equipment group, the indicator radio network temporary identifier is used for identifying that the received DCI is the first DCI by the user equipment, the group identifier is used for determining whether the received DCI is the first DCI corresponding to the user equipment group, and the intra-group identifier is used for determining a bit corresponding to the user equipment in the first DCI by the user equipment.

16. The method of any one of claims 10 to 13, wherein the sending, by the base station, the first indication information to the user equipment in the set resource of the PDCCH resource region comprises:

the base station sends at least 1-bit information to the user equipment in the set resources of the PDCCH resource region, where the at least 1-bit information is used to indicate whether DCI for scheduling data corresponding to the user equipment is detected in the PDCCH resource region in a transmission cycle, and each bit information included in the at least 1-bit information is transmitted independently.

17. The method of claim 16, wherein before the base station transmits at least 1-bit information to the user equipment in the set resources of the PDCCH resource region, the method further comprises:

18. The method of any one of claims 10 to 17, further comprising:

19. An apparatus for transmitting downlink control information, comprising a processor, a memory, and a transceiver,

the memory is used for storing a software program;

the processor is used for calling and executing the software program stored in the memory, and transmitting and receiving data through the transceiver to realize the method of any one of claims 1 to 9.

20. An apparatus for transmitting downlink control information, comprising a processor, a memory, and a transceiver,

the memory is used for storing a software program;

the processor is used for calling and executing the software program stored in the memory, and transmitting and receiving data through the transceiver to realize the method of claims 10 to 18.

21. A user equipment, characterized in that the user equipment is configured to perform the method according to any of claims 1-9.

22. A base station, characterized in that the base station is configured to perform the method of any of claims 10-18.

23. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any one of claims 1 to 9; or causing said computer to carry out the method of any one of claims 10 to 18.

24. A computer program which, when executed on a computer, causes the computer to carry out the method of any one of claims 1 to 9 or causes the computer to carry out the method of any one of claims 10 to 18.

25. A communication system comprising a user equipment according to any of claims 1-9 and a base station according to any of claims 10-18.

26. A computer-readable storage medium, on which a computer program is stored, which, when executed on a computer, causes the computer to carry out the method of any one of claims 1 to 9; or to cause the computer to carry out the method of any of claims 10 to 18.

27. A chip, comprising: a processing module and a communication interface, the processing module to perform the method of any one of claims 1 to 9; or, the processing module is configured to perform the method of any of claims 10-18.

28. The chip of claim 27, further comprising a storage module (e.g., a memory) for storing instructions, and wherein the processing module is configured to execute the instructions stored by the storage module, such that the processing module performs the method of any one of claims 1 to 9; or cause the processing module to perform the method of any of claims 10-18.