CN105991263B

CN105991263B - Downlink control information DCI configuration, downlink data receiving method and device

Info

Publication number: CN105991263B
Application number: CN201510052459.0A
Authority: CN
Inventors: 杨维维; 戴博; 夏树强; 梁春丽
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-01-30
Filing date: 2015-01-30
Publication date: 2020-05-12
Anticipated expiration: 2035-01-30
Also published as: CN105991263A; WO2016119455A1

Abstract

The invention discloses a method and a device for configuring Downlink Control Information (DCI) and receiving downlink data, wherein the method for configuring the DCI comprises the following steps: when at most carrier aggregation supporting T carriers and cross-carrier scheduling is configured, configuring corresponding DCI for the aggregated serving cell by adopting one of the following modes: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; and transmitting DCI corresponding to the serving cell to the terminal. The invention solves the problem that the terminal can not correctly obtain the downlink control information of each service cell under the condition of supporting the aggregation of up to 32 service cells in the related technology, and realizes the effect that the terminal correctly obtains the downlink control information of up to 32 aggregated service cells so as to correctly obtain the downlink data.

Description

Downlink control information DCI configuration, downlink data receiving method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a configuration of downlink control information DCI, a method and an apparatus for receiving downlink data.

Background

In order to meet the requirements of the International telecommunications Union-Advanced (ITU-Advanced for short), a Long Term Evolution-Advanced (LTE-a) system, which is an Evolution standard of Long Term Evolution (LTE for short), needs to support a larger system bandwidth (up to 100MHz) and needs to be backward compatible with the existing standard of LTE. On the basis of the existing LTE system, the bandwidths of the LTE system may be combined to obtain a larger bandwidth, which is referred to as a Carrier Aggregation (CA) technology, and the technology can improve the spectrum utilization rate of an advanced International Mobile Telecommunication (IMT-Advance) system, alleviate the shortage of spectrum resources, and further optimize the utilization of the spectrum resources, where the existing Carrier Aggregation supports Aggregation of at most 5 component carriers.

In a system in which carrier aggregation is introduced, a carrier to be aggregated is referred to as a Component Carrier (CC) and also referred to as a Serving Cell (Serving Cell). Meanwhile, the concept of Primary Component Carrier/Cell (PCC/PCell) and secondary Component Carrier/Cell (SCC/SCell) is also proposed, and in a system with Carrier aggregation, at least one Primary serving Cell and a secondary serving Cell are included, wherein the Primary serving Cell is always in an active state. In the LTE-a system, cross-carrier scheduling is introduced, that is, a Physical Downlink Control Channel (PDCCH for short) on a certain serving cell can schedule a Physical Downlink shared Channel (HS-PDSCH) of multiple serving cells/a terminal transmit uplink data Channel (PUSCH for short), wherein a serving cell in which the PDCCH is located is referred to as a scheduling cell, and a serving cell in which the PDSCH/PUSCH is located is referred to as a scheduled serving cell. When cross-Carrier scheduling is configured, a terminal detects that a Carrier Indicator Field (CIF) is included in a serving cell c, and then a User Equipment (UE) decodes a PDSCH on the corresponding serving cell according to the value of the CIF.

In subsequent releases, support for aggregation to up to 32 serving cells is considered. For the aggregation of at most 32 serving cells, how to configure the downlink control information of the 32 serving cells needs to be considered so that the terminal can correctly obtain the downlink control information of each serving cell, thereby correctly solving the downlink data.

In the related art, an effective solution has not been proposed yet for the problem that a terminal cannot correctly obtain downlink control information of each serving cell when aggregation of up to 32 serving cells is supported.

Disclosure of Invention

The invention provides a configuration of Downlink Control Information (DCI), a receiving method of downlink data and a device thereof, which are used for at least solving the problem that a terminal cannot accurately obtain the downlink control information of each service cell under the condition of supporting aggregation of at most 32 service cells in the related art.

According to an aspect of the present invention, a method for configuring downlink control information DCI is provided, including: when at most carrier aggregation supporting T carriers and cross-carrier scheduling is configured, configuring corresponding DCI for the aggregated serving cell by adopting one of the following modes: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located; and sending the DCI corresponding to the serving cell to a terminal.

Further, configuring the corresponding DCI for the aggregated serving cell further includes: when at most the aggregated carriers supporting the T carriers and configuring self-scheduling, configuring corresponding DCI for the serving cell by adopting at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits.

Further, comprising: and under the condition that the CIF is X bits, configuring a virtual carrier indication corresponding to the serving cell through signaling, wherein the virtual carrier indication is used for indicating an index of the serving cell in a virtual carrier set, and the virtual carrier set is obtained according to the signaling configuration.

Further, the manner of configuring the virtual carrier indication corresponding to the serving cell includes at least one of: configuring the virtual carrier indication according to the corresponding relation between the DCI containing the CIF and the PDSCH of the serving cell; and configuring the virtual carrier indication according to the CIF.

Further, before sending the DCI corresponding to the serving cell to a terminal, the method further includes: grouping the aggregated serving cells.

Further, grouping the aggregated serving cells comprises: configuring DCIs corresponding to all service cells in each group to be the same in size; or configuring that the sizes of the DCI formats corresponding to the serving cells in each group are the same and the dedicated search spaces of the serving cells are the same, where the dedicated search spaces are the same, which means that the starting points of the dedicated search spaces of the serving cells are the same as the search spaces.

Further, grouping the aggregated serving cells comprises: and configuring a subgroup index of each group, wherein the subgroup index is used for determining a search space corresponding to each group.

Further, grouping the aggregated serving cells comprises: the dedicated search spaces configured to the serving cells belonging to the same group are distributed on a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.

Further, grouping the aggregated serving cells comprises: configuring a private search space of a serving cell in any one group to be located in the same resource block pair set of the ePDCCH; configuring a set of resource block pairs of the ePDCCH where dedicated search spaces belonging to serving cells in different groups are located; wherein the number of resource block pair sets of the ePDCCH is related to the number of packets.

Further, configuring the corresponding DCI for the aggregated serving cell further includes: when the carrier aggregation of at most T carriers and self-scheduling configuration are carried out, configuring the activated serving cell in a time division mode;

further, configuring the corresponding DCI for the aggregated serving cell further includes: and when at most the carriers supporting the T carriers are aggregated and self-scheduling is configured, configuring the total maximum blind detection times corresponding to all the activated service cells.

Further, the serving cell is a frequency division duplex FDD serving cell or a time division duplex TDD serving cell.

According to another aspect of the present invention, there is also provided a method for receiving downlink data, including: receiving downlink control information DCI; when at most carriers supporting T carriers are aggregated and cross-carrier scheduling is configured, the DCI is configured according to one of the following modes: mode 1: expanding the CIF into N bits, wherein N is ceil (log2(T)), wherein N is a positive integer; mode 2: the CIF is X bits, wherein X is a positive integer and is smaller than N; determining a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located according to a Carrier Indicator Field (CIF) included in the DCI; receiving downlink data from the determined PDSCH of the serving cell.

Further, when configuring at most the aggregated carriers of the T carriers and configuring self-scheduling, the DCI is configured by using at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field.

Further, determining, according to the carrier indicator field CIF included in the DCI, a serving cell in which the downlink shared channel PDSCH corresponding to the DCI including the CIF is located includes: receiving a virtual carrier indication under the condition that the CIF is X bits, wherein the virtual carrier indication is used for indicating an index of the serving cell in a virtual carrier set; and acquiring the corresponding relation between the DCI containing the CIF and the PDSCH of the serving cell according to the CIF and the virtual carrier indication.

Further, the set of virtual carriers and/or the virtual carrier indication is obtained from signaling.

Further, acquiring the corresponding relationship between the DCI including the CIF and the PDSCH of the serving cell according to the CIF and the virtual carrier indication includes: and determining that the DCI containing the CIF is the DCI corresponding to the PDSCH of the serving cell under the condition that the CIF is the same as the virtual carrier indication.

Further, before receiving the downlink control information DCI, the method further includes: and when at most the carriers supporting the T carriers are aggregated and self-scheduling is configured, acquiring the corresponding activated service cell on each subframe/wireless frame according to a time division mode.

Further, before receiving the downlink control information DCI, the following are reserved: when the carrier aggregation supporting T carriers and self-scheduling are configured, blind detection is carried out on the activated service cell according to the preset total maximum blind detection times; further, the serving cell is a frequency division duplex FDD serving cell or a time division duplex TDD serving cell.

According to an aspect of the present invention, there is provided a device for configuring downlink control information DCI, where the device is applied to a base station, and the device includes: a first configuration module, configured to configure corresponding DCI for an aggregated serving cell by using one of the following methods when aggregating carriers that support at least T carriers and configuring cross-carrier scheduling: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located; and the sending module is used for sending the DCI corresponding to the service cell to a terminal.

Further, the apparatus further comprises: a second configuration module, configured to configure, when aggregation is performed on at least multiple carriers supporting the T carriers and self-scheduling is configured, DCI corresponding to the serving cell according to at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits.

Further, the apparatus further comprises: a third configuration module, configured to configure, by signaling, a virtual carrier indication corresponding to the serving cell when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set, and the virtual carrier set is obtained according to the signaling configuration.

Further, the third configuration module comprises: a first configuration unit, configured to configure the virtual carrier indication according to a correspondence between the DCI including the CIF and the PDSCH of the serving cell; and/or a second configuration unit, configured to configure the virtual carrier indication according to the CIF.

Further, the apparatus further comprises: and the grouping module is used for grouping the aggregated service cells.

Further, the apparatus further comprises: a fourth configuration module, configured to configure that the DCI corresponding to each serving cell in each group has the same size; or, a fifth configuration module, configured to configure that the DCI formats corresponding to the serving cells in each group have the same size and the proprietary search spaces of the serving cells are the same, where the proprietary search spaces are the same, and the starting points of the proprietary search spaces of the serving cells and the search spaces have the same size.

Further, the apparatus further comprises: and a sixth configuration module, configured to configure a group index of each group, where the group index is used to determine a search space corresponding to each group.

Further, the apparatus further comprises: and a seventh configuration module, configured to configure the dedicated search space of the serving cell belonging to the same group to be distributed in a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.

Further, the apparatus further comprises: an eighth configuration module, configured to configure a same resource block pair set, where a dedicated search space of a serving cell in any one of the groups is located in an ePDCCH; a ninth configuration module, configured to configure a set of different resource block pairs of the ePDCCH where the dedicated search spaces of the serving cells belonging to different groups are located; wherein the number of resource block pair sets of the ePDCCH is related to the number of packets.

Further, the apparatus further comprises: and the activation module is used for activating the service cell in a time division mode.

Further, the apparatus further comprises: and the configuration module is used for configuring the total maximum blind detection times corresponding to all the activated service cells.

According to another aspect of the present invention, there is also provided an apparatus for receiving downlink data, where the apparatus is applied to a terminal, and the apparatus includes: a first receiving module, configured to receive downlink control information DCI; wherein, carrier aggregation of at most T carriers is configured, and when cross-carrier scheduling is configured, the DCI is configured according to one of the following modes: mode 1: expanding the CIF into N bits, wherein N is ceil (log2(T)), wherein N is a positive integer; mode 2: the CIF is X bits, wherein X is a positive integer and is smaller than N; a determining module, configured to determine, according to a carrier indicator field CIF included in the DCI, a serving cell in which a downlink shared channel PDSCH corresponding to the DCI including the CIF is located; and a second receiving module, configured to receive downlink data from the PDSCH of the determined serving cell.

Further, when at most the carriers supporting the T carriers are aggregated and self-scheduling is configured, the DCI is configured by using at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field.

Further, the determining module includes: a receiving unit, configured to receive a virtual carrier indication when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set; a determining unit, configured to acquire, according to the CIF and the virtual carrier indication, a correspondence between the DCI including the CIF and the PDSCH of the serving cell.

Further, the receiving unit is further configured to receive the set of virtual carriers and/or the virtual carrier indication from signaling.

Further, the determining module is further configured to determine, when the CIF is the same as the virtual carrier indication, that the DCI including the CIF is DCI corresponding to the PDSCH of the serving cell.

The device further comprises: and the acquisition module is used for acquiring the corresponding activated serving cell on each subframe/wireless frame according to a time division mode.

Further, the apparatus further comprises: and the detection module is used for carrying out blind detection on the activated service cell according to the preset total maximum blind detection times.

By the invention, when a system supports multiple aggregated carriers of T carriers and configures cross-carrier scheduling, corresponding DCI is configured for the aggregated service cell by adopting one of the following modes: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located; and transmitting DCI corresponding to the serving cell to the terminal. The problem that the terminal cannot correctly obtain the downlink control information of each service cell under the condition of supporting aggregation of at most 32 service cells in the related technology is solved, and the effect that the terminal correctly obtains the downlink control information of the service cells supporting aggregation of at most 32 service cells so as to correctly solve downlink data is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a configuration method of downlink control information DCI according to an embodiment of the present invention;

fig. 2 is a block diagram of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 3 is a block diagram (i) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 4 is a block diagram (ii) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 5 is a block diagram (iii) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 6 is a block diagram (iv) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 7 is a block diagram (v) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 8 is a block diagram (six) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 9 is a block diagram (seventh) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 10 is a block diagram (eight) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 11 is a block diagram (nine) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 12 is a block diagram (ten) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention;

fig. 13 is a flowchart of a receiving method of downlink data according to an embodiment of the present invention;

fig. 14 is a block diagram of a structure of a downlink data receiving apparatus according to an embodiment of the present invention;

fig. 15 is a block diagram (one) of a structure of a downlink data receiving apparatus according to an embodiment of the present invention;

fig. 16 is a block diagram of a structure of a downlink data receiving apparatus according to an embodiment of the present invention;

fig. 17 is a block diagram (iii) of the structure of a downlink data receiving apparatus according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a first embodiment of the present invention;

FIG. 19 is a schematic view of a second embodiment of the present invention;

FIG. 20 is a schematic view of a fourth embodiment of the present invention;

FIG. 21 is a schematic view of a fifth embodiment of the present invention;

fig. 22 is a schematic view relating to a sixth embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In this embodiment, a method for configuring downlink control information DCI is provided, and fig. 1 is a flowchart of a method for configuring downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 1, the flowchart includes the following steps:

step S102, when a plurality of carriers supporting T carriers are aggregated and cross-carrier scheduling is configured, configuring corresponding DCI for the aggregated service cell by adopting one of the following modes: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located;

step S104, sending the DCI corresponding to the serving cell to the terminal.

Through the above steps, the method 1 or 2 is used to configure the corresponding DCI for the aggregated serving cell, so that the problem that the terminal cannot correctly obtain the downlink control information of each serving cell when aggregation of up to 32 serving cells is supported in the related art is solved, and the terminal can correctly obtain the downlink control information of up to 32 aggregated serving cells, thereby correctly solving the effect of obtaining downlink data.

In the above step S102, configuring the corresponding DCI for the aggregated serving cell is involved, in another optional embodiment, when at most aggregated carriers of the T carriers are supported and self-scheduling is configured, configuring the corresponding DCI for the serving cell by using at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits. And thus, the corresponding DCI is configured for the aggregated serving cell more preferably.

When the CIF is X bits, that is, when the above method 2 is adopted to configure corresponding DCI for an aggregated serving cell, in an optional embodiment, a virtual carrier indication corresponding to the serving cell is configured through signaling, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set, where the virtual carrier set is obtained according to the signaling configuration. Therefore, the terminal can obtain the corresponding relation between the DCI containing the CIF and the corresponding PDSCH according to the CIF and the virtual carrier indication, and the signaling is high-level signaling for example.

In an optional embodiment, the virtual carrier indication may be configured according to a correspondence between the DCI including the CIF and the PDSCH of the serving cell, the virtual carrier indication corresponding to the serving cell may be configured, or the virtual carrier indication may be configured according to the CIF.

In order to improve the efficiency of the terminal for blind detection of DCI, in one embodiment, the aggregated serving cells are grouped before DCI corresponding to the serving cell is transmitted to the terminal.

After grouping the aggregated serving cells, in an optional embodiment, configuring that the DCI corresponding to each serving cell in each group has the same size; or configuring that the sizes of the DCI formats corresponding to the serving cells in each group are the same and the proprietary search spaces of the serving cells are the same, where the proprietary search spaces are the same means that the starting points of the proprietary search spaces of the serving cells and the search spaces are the same in size.

After grouping the aggregated cells, in an optional embodiment, a group index of each group is configured, wherein the group index is used to determine a search space corresponding to each group.

After grouping the aggregated serving cells, in an optional embodiment, the dedicated search spaces of the serving cells belonging to the same group are configured to be distributed in a Physical Downlink Control Channel PDCCH or an Enhanced Physical Downlink Control Channel (ePDCCH).

After grouping the aggregated serving cells, in an optional embodiment, configuring a dedicated search space of the serving cell in any group to be located in the same resource block pair set of the ePDCCH; configuring a dedicated search space belonging to a serving cell in a different group to be located in a different resource block pair set of the ePDCCH; wherein, the number of resource block pair sets of the ePDCCH is related to the number of the packets.

In an optional embodiment, before configuring corresponding DCI for an aggregated serving cell, when at most carriers supporting T carriers are aggregated and self-scheduling is configured, an activated serving cell is configured in a time division manner; in another alternative embodiment, the total maximum blind detection times corresponding to all active serving cells are configured.

In an optional embodiment, the serving cell is a Frequency Division Duplex (FDD) serving cell or a Time Division Duplex (TDD) serving cell.

In an optional embodiment, the size of the downlink control information, the distribution of the search space, and the grouping corresponding to the search space position may be the same or different; when configuring downlink control information, the size of the downlink control information, the search space distribution and the search space position may be configured jointly or individually; the aggregated serving cell may be located on a licensed spectrum, or may be located on an unlicensed spectrum, or may be partially located on the licensed spectrum and partially located on the unlicensed spectrum.

In this embodiment, a configuration apparatus of downlink control information DCI is also provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 2 is a block diagram of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, where the apparatus is applied to a base station, and as shown in fig. 2, the apparatus includes: a first configuration module 22, configured to configure, when aggregation of carriers supporting at least T carriers and cross-carrier scheduling are configured, a DCI corresponding to an aggregated serving cell in one of the following manners: mode 1: setting a carrier indication field CIF to N bits, wherein N is ceil (log2(T)), and N is a positive integer; mode 2: setting the CIF to X bits, wherein X is a positive integer and is smaller than N; the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located; and a sending module 24, configured to send the DCI corresponding to the serving cell to the terminal.

Fig. 3 is a block diagram (a) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 3, the apparatus further includes: a second configuration module 32, configured to configure the DCI for the serving cell according to at least one of the following rules when configuring self-scheduling and supporting aggregation carriers of the T carriers: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits.

Fig. 4 is a block diagram (ii) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 4, the apparatus further includes: a third configuring module 42, configured to configure, by signaling, a virtual carrier indication corresponding to the serving cell when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set, where the virtual carrier set is obtained according to the signaling configuration.

Fig. 5 is a block diagram (iii) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 5, the third configuration module 42 includes: a first configuring unit 422, configured to configure the virtual carrier indicator according to a correspondence between the DCI including the CIF and the PDSCH of the serving cell; and/or a second configuration unit 424, configured to configure the virtual carrier indication according to the CIF.

Fig. 6 is a block diagram (iv) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 6, the apparatus further includes: and a grouping module 62 for grouping the aggregated serving cells.

Fig. 7 is a block diagram (five) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 7, the apparatus further includes: a fourth configuration module 72, configured to configure that the DCI corresponding to each serving cell in each group has the same size; or, the fifth configuring module 74 is configured to configure that the DCI formats corresponding to the serving cells in each group have the same size and the proprietary search spaces of the serving cells are the same, where the proprietary search spaces are the same, where the starting point of the proprietary search spaces of the serving cells and the search spaces have the same size.

Fig. 8 is a block diagram (six) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 8, the apparatus further includes: a sixth configuring module 82, configured to configure a group index of each group, where the group index is used to determine a search space corresponding to each group.

Fig. 9 is a block diagram (seventeenth) of a configuration apparatus for downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 9, the apparatus further includes: a seventh configuration module 92, configured to configure the dedicated search spaces of the serving cells belonging to the same group to be distributed in the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH.

Fig. 10 is a block diagram (eight) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 10, the apparatus further includes: an eighth configuring module 1002, configured to configure a same resource block pair set, where a dedicated search space of a serving cell in any one of the groups is located in an ePDCCH; a ninth configuring module 1004, configured to configure different sets of resource block pairs of the ePDCCH where the dedicated search spaces belonging to the serving cells in different groups are located; wherein, the number of resource block pair sets of the ePDCCH is related to the number of the packets.

Fig. 11 is a block diagram (nine) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 11, the apparatus further includes: an activating module 1102, configured to activate the serving cell in a time division manner.

Fig. 12 is a block diagram (ten) of a configuration apparatus of downlink control information DCI according to an embodiment of the present invention, and as shown in fig. 12, the apparatus further includes: a configuring module 1202, configured to configure the total maximum blind detection times corresponding to the activated serving cell.

Optionally, the serving cell is a frequency division duplex FDD serving cell or a time division duplex TDD serving cell.

In another embodiment, a method for receiving downlink data is provided, and fig. 13 is a flowchart of the method for receiving downlink data according to the embodiment of the present invention, as shown in fig. 13, the flowchart includes the following steps:

step S1302, receiving downlink control information DCI; when at most carrier aggregation supporting T carriers and cross-carrier scheduling are configured, the DCI is configured according to one of the following modes: mode 1: expanding CIF to N bits, where N ═ ceil (log2(T)), where N is a positive integer; mode 2: CIF is X bits, wherein X is a positive integer and is smaller than N;

step S1304, determining a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located according to the Carrier Indicator Field (CIF) included in the DCI;

step S1306 receives downlink data from the PDSCH associated with the determined serving cell.

Through the steps, the terminal determines the serving cell where the downlink shared channel PDSCH corresponding to the DCI containing the CIF is located according to the carrier indicator field CIF included in the DCI, wherein the DCI is configured according to the two modes, so that the problem that the terminal cannot correctly obtain the downlink control information of each serving cell under the condition of supporting aggregation of at most 32 serving cells in the related technology is solved, the terminal can correctly obtain the downlink control information of the serving cells supporting aggregation of at most 32 serving cells, and the effect of correctly solving downlink data is achieved.

In an optional embodiment, when configuring aggregation carriers of at most T carriers and configuring self-scheduling, the DCI is configured by using at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI includes a check field.

In the above step S1304, a serving cell where a downlink shared channel PDSCH corresponding to the DCI including the CIF is located is determined according to a carrier indicator field CIF included in the DCI, and in an optional embodiment, when the CIF is X bits, a virtual carrier indicator is received, where the virtual carrier indicator is used to indicate an index of the serving cell in a virtual carrier set, and a corresponding relationship between the DCI including the CIF and the PDSCH of the serving cell is obtained according to the CIF and the virtual carrier indicator.

In an alternative embodiment, the set of virtual carriers and/or the virtual carrier indication is obtained from signaling.

In the process of obtaining the corresponding relationship between the DCI containing the CIF and the PDSCH of the serving cell according to the CIF and the virtual carrier indication, in an optional embodiment, under the condition that the CIF is the same as the virtual carrier indication, it is determined that the DCI containing the CIF is the DCI corresponding to the PDSCH of the serving cell.

In an optional embodiment, before receiving the DCI, when aggregation of carriers up to T carriers and self-scheduling are configured, a corresponding activated serving cell on each subframe/radio frame is obtained according to a time division manner; in another alternative embodiment, in this case, the blind detection of the active serving cell is performed according to a predetermined total maximum number of blind detections;

in an optional embodiment, the serving cell is a frequency division duplex FDD serving cell or a time division duplex TDD serving cell.

In this embodiment, a device for receiving downlink data is further provided, where the device is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 14 is a block diagram of a structure of a downlink data receiving apparatus according to an embodiment of the present invention, which is applied to a terminal, and as shown in fig. 14, the apparatus includes: a first receiving module 1402, configured to receive downlink control information DCI; wherein, when at most T carrier aggregation is configured and cross-carrier scheduling is configured, the DCI is configured according to one of the following modes: mode 1: expanding CIF to N bits, where N ═ ceil (log2(T)), where N is a positive integer; mode 2: CIF is X bits, wherein X is a positive integer and is smaller than N; a determining module 1404, configured to determine, according to a carrier indicator field CIF included in the DCI, a serving cell in which a downlink shared channel PDSCH corresponding to the DCI including the CIF is located; a second receiving module 1406 is configured to receive downlink data from the determined PDSCH of the serving cell.

Optionally, when at most the carriers supporting the T carriers are aggregated and self-scheduling is configured, the DCI is configured by using at least one of the following rules: rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16; rule 2: the DCI includes a check field.

Fig. 15 is a block diagram (a) of a structure of a downlink data receiving apparatus according to an embodiment of the present invention, and as shown in fig. 15, the determining module 1404 includes: a receiving unit 140402, configured to receive a virtual carrier indicator when the CIF is X bits, where the virtual carrier indicator indicates an index of a serving cell in a virtual carrier set; a determining unit 140404, configured to acquire, according to the CIF and the virtual carrier indication, a correspondence between the DCI including the CIF and the PDSCH of the serving cell.

Optionally, the receiving unit 140402 is further configured to receive the set of virtual carriers and/or the virtual carrier indication from the signaling.

Optionally, the determining module 1404 is further configured to determine, if the CIF is the same as the virtual carrier indication, that the DCI including the CIF is a DCI corresponding to the PDSCH of the serving cell.

Fig. 16 is a block diagram (ii) of a structure of a downlink data receiving apparatus according to an embodiment of the present invention, and as shown in fig. 16, the apparatus further includes: an obtaining module 1602, configured to obtain the activated serving cell corresponding to each subframe/radio frame according to a time division manner.

Fig. 17 is a block diagram (iii) of a structure of a downlink data receiving apparatus according to an embodiment of the present invention, and as shown in fig. 17, the apparatus further includes: a detecting module 1702, configured to perform blind detection on the activated serving cell according to a predetermined total maximum number of blind detections.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: all the modules are positioned in the same processor; alternatively, the modules are located in the first processor, the second processor, and the third processor …, respectively.

In view of the above problems in the related art, the following description is made with reference to an alternative embodiment, in which the above alternative embodiment and its alternative embodiments are combined.

Example one

In the existing LTE system, a physical downlink control channel/enhanced physical downlink control channel (PDCCH/ePDCCH) is used for carrying Downlink Control Information (DCI), and includes: uplink scheduling information, downlink scheduling information, and uplink power control information. The formats of DCI are classified into the following: DCI format0, DCI format1, DCI format1A, DCI format1B, DCIformat1C, DCI format1D, DCI format2, DCI format2A, DCI format2B, DCI format2C, DCIformat2D, DCI format3, DCI format3A and DCI format4, wherein: the DCI format0/4 is used to indicate scheduling of uplink data on a Physical Uplink Shared Channel (PUSCH), DCI format1, DCI format1A, DCI format1B, DCIformat1C, DCI format1D, DCI format2, DCI format2A, DCI format2B, DCI format2C, and DCIformat2D are used to indicate scheduling of uplink and downlink data on a Physical Downlink Shared Channel (PDSCH), and DCI format3 and DCIformat3A are used in different modes of power control signaling of a physical uplink control channel and a PUSCH.

The physical Resource transmitted by the PDCCH is a Control Channel Element (CCE) unit, and the size of one CCE is 9 Resource Elements (REGs), that is, 36 Resource Elements (REs). One PDCCH may occupy 1,2,4,8 CCEs. One search space is defined for each aggregation level, including a public search space and a user equipment-specific search space. The public search space carries public information related to system information block, immediate access response and paging; the search space dedicated to the UE carries uplink and downlink scheduling grant information of the UE. When the UE receives the downlink control information, it detects a common search space with aggregation levels of 4 and 8 and a UE-specific search space with aggregation levels of 1,2,4, and 8, where the common search space and the UE-specific search space may overlap. The specific detection times and the corresponding search spaces are shown in table 1.

TABLE 1 correspondence table of detection times and search spaces

The UE receives PDSCH data as indicated by the PDCCH of the user-specific search space by higher layer signaling being semi-statically set to one of a plurality of transmission modes:

mode 1: a single antenna port; port 0;

mode 2: transmit diversity;

mode 3: open-loop spatial multiplexing;

mode 4: closed-loop spatial multiplexing;

mode 5: multi-user multiple input multiple output;

mode 6: closed loop RANK 1 precoding;

mode 7: a single antenna port; a port 5;

mode 8: a dual-layer transmission mode; ports 7 and 8;

mode 9: up to 8 layers of transport: ports 7-14;

mode 10: up to 8 layers of transport: ports 7-14;

if the UE is configured by the higher layer to perform PDCCH decoding using a Cyclic redundancy check code (CRC) scrambled by a Cell Radio Network Temporary identifier (Cell Radio Network Temporary identifier, abbreviated as "Temporary C-RNTI"), the UE should decode the PDCCH and the related PDSCH according to the corresponding combination defined in table 2.

Table 2 table of correspondence between downlink transmission mode, DCI format, search space, and transmission scheme

If the UE is set by the higher layer to perform PDCCH decoding with cyclic redundancy check scrambled with the cell radio network temporary identity C-RNTI, the UE should decode PDCCH and all related PUSCHs in the corresponding combinations defined in Table 3.

Table 3 table of correspondence between uplink transmission mode, DCI format, search space, and transmission scheme

In order to solve the PDCCH capacity problem, an enhanced PDCCH (enhanced PDCCH, abbreviated as ePDCCH) is also introduced in a subsequent release, where the ePDCCH is different from the PDCCH in that the ePDCCH is multiplexed with a PDSCH in a frequency multiplexing manner, a mapping manner of the ePDCCH in a frequency domain has continuous mapping and discrete mapping, a base station configures k resource block pair sets for transmitting the ePDCCH, 1 resource block pair set includes N resource block pairs, where k is greater than or equal to 1, a value of N is 1,2,4,8,16, 1 resource block pair includes 16 enhanced resource element groups (enhanced resource element groups, abbreviated as eregs), 1 resource block may be divided into 2 ecces or 4 ecces, L-ecces corresponding to the continuously mapped ePDCCH are formed by eregs in the 1 resource pair, and D-ecces corresponding to the discretely mapped ePDCCH are formed by eregs of multiple resource block pairs.

The most significant feature of the LTE-a system compared to the LTE system is that the LTE-a system introduces a carrier aggregation technology, that is, the bandwidth of the LTE system is aggregated to obtain a larger bandwidth. In a system that introduces Carrier aggregation, a Carrier that performs aggregation is referred to as a Component Carrier (CC) and also referred to as a Serving Cell (Serving Cell). Meanwhile, concepts of Primary Component Carrier/Cell (PCC/PCell) and Secondary Component Carrier/Cell (SCC/SCell) are also proposed. In a system with carrier aggregation, at least one primary serving cell and a secondary serving cell are included, wherein the primary serving cell is always in an activated state, and PUCCH is only required to be transmitted on Pcell.

In carrier aggregation, high-level signaling indicates whether a serving cell is self-scheduling or cross-carrier scheduling, if the serving cell is self-scheduling, indicates whether a CIF domain is contained, and if the serving cell is cross-carrier scheduling, indicates a cell index where scheduling information is located. Fig. 18 is a schematic diagram related to a first embodiment of the present invention, as shown in fig. 18, it is assumed that 5 downlink serving cells are aggregated, a CIF domain is configured on downlink control information of a serving cell 1, and a high-level signaling indicates that { serving cell 2, serving cell 3, and serving cell 4} correspond to scheduling information on the serving cell 1, that is, DCI with CIF 000 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 1, DCI with CIF 001 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 2, and DCI with CIF 010 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 3; the DCI with the CIF of 011 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 4; the DCI with CIF of 100 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 5.

Example two

Assuming that T ═ 32 downlink serving cells are aggregated, fig. 19 is a schematic diagram related to the second embodiment of the present invention, and as shown in fig. 19, the carrier indication field is directly extended to N ═ cel (log2(32)) bits, 32 serving cells are configured for aggregation, and then the carrier indication field is 5 bits, that is, N ═ 5;

configuring a CIF domain on downlink control information of a serving cell 1, wherein a high-level signaling indicates that scheduling information corresponding to { serving cell 2, serving cell 3, serving cell 4, …, serving cell 32} is on the serving cell 1, namely, DCI with CIF of 00000 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 1, DCI with CIF of 00001 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 2, and DCI with CIF of 00010 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 3; the DCI with CIF of 00011 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 4; the DCI with CIF 00100 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 5, the DCI with CIF 00101 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 6, the DCI with CIF 00110 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 7, the DCI with CIF 00111 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 8, the DCI with CIF 01000 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 9, the DCI with CIF 01001 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 10, the DCI with CIF 01010 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 11, the DCI with CIF 01011 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 12, and the DCI with CIF 01100 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 13, the DCI with CIF 01101 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 14, the DCI with CIF 01110 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 15, the DCI with CIF 01111 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 16, the DCI with CIF 10000 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 17, the DCI with CIF 10001 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 18, and the DCI with CIF 10010 on the serving cell 1 is downlink control information corresponding to the PDSCH on the serving cell 19; the DCI with CIF 10011 in serving cell 1 is downlink control information corresponding to PDSCH in serving cell 20; the DCI with CIF of 10100 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 21, the DCI with CIF of 10101 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 22, the DCI with CIF of 10110 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 23, the DCI with CIF of 10111 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 24, the DCI with CIF of 11000 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 25, the DCI with CIF of 11001 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 26, the DCI with CIF of 11010 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 27, the DCI with CIF of 11011 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 28, and the DCI with CIF of 11100 on the serving cell 1 is downlink control information corresponding to PDSCH on the serving cell 29. The DCI with CIF 11101 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 30, the DCI with CIF 11110 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 31, and the DCI with CIF 11111 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 32.

The problem of cross-carrier scheduling in up to 32 carrier aggregation can be solved by configuring a CIF with 5 bits.

EXAMPLE III

The terminal-side behavior corresponding to mode 2 is given below:

the method comprises the following steps: the terminal obtains the virtual carrier set and the information of the scheduling service cell and the scheduled service cell according to the high-level signaling;

step two: the terminal obtains a corresponding relation between the DCI containing the CIF and the corresponding PDSCH according to the CIF and the virtual carrier indication;

step three: and the terminal acquires the corresponding PDSCH according to the DCI.

Example four

Assuming that there are 16 downlink serving cell aggregations, fig. 20 is a schematic diagram related to a fourth embodiment of the present invention, as shown in fig. 20, a high-level signaling indicates whether a serving cell is self-scheduling or cross-carrier scheduling, and if the serving cell is self-scheduling, indicates whether a CIF domain is included, and if the serving cell is cross-carrier scheduling, indicates a cell index where scheduling information is located and a virtual carrier indication. As shown, the aggregated serving cells are divided into 2 virtual serving cell sets according to the cell index indicating the location of the scheduling information in the higher layer signaling, and the scheduling information corresponding to { serving cell 3, serving cell 5, serving cell 7, serving cell 8, serving cell 9, serving cell 10, serving cell 11} is on serving cell 1, and the scheduling information corresponding to { serving cell 2, serving cell 6, serving cell 12, serving cell 13, serving cell 14, serving cell 15, serving cell 16} is on serving cell 4, that is, { serving cell 1, serving cell 3, serving cell 5, serving cell 7, serving cell 8, serving cell 9, serving cell 10, serving cell 11} corresponds to one virtual carrier set, { serving cell 2, serving cell 4, serving cell 6, serving cell 12, serving cell 13, serving cell 14, serving cell 15, serving cell 16 corresponds to a virtual carrier set.

The virtual carrier indication corresponding to the serving cell 3 is 001, then the DCI with CIF 001 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 3, the virtual carrier indication corresponding to the serving cell 5 is 010, and then the DCI with CIF 010 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 5; the virtual carrier indication corresponding to the serving cell 7 is 011, and then the DCI with the CIF of 011 in the serving cell 1 is downlink control information corresponding to the PDSCH in the serving cell 7; if the virtual carrier indication corresponding to the serving cell 2 is 001, the DCI with CIF of 001 in the serving cell 4 is scheduling information corresponding to the PDSCH in the serving cell 2; if the virtual carrier indication corresponding to the serving cell 15 is 111, the DCI with CIF of 111 in the serving cell 4 is scheduling information corresponding to the PDSCH in the serving cell 15;

the problem of cross-carrier scheduling in the aggregation of at most 32 carriers can be solved by combining the carrier indication domain with the virtual carrier indication, the existing CIF domain does not need to be increased, and the complexity of terminal detection is reduced.

EXAMPLE five

Assuming 32 downlink cell aggregates, where 4 cells are located in the licensed spectrum, i.e., { cell 1, cell 2, cell 3 and cell 4} are cells on the licensed spectrum, 28 cells are located in the unlicensed spectrum, { cell 5, cell 6, …, cell 32} are located in the unlicensed spectrum, the aggregated downlink cells are divided into 4 groups, each group consisting of a cell on the licensed spectrum and 7 cells on the unlicensed spectrum, i.e., group 1 consists of { cell 1, cell 5, cell 6, cell 7, cell 8, cell 9, cell 10, cell 11}, group 2 consists of { cell 2, cell 12, cell 13, cell 14, cell 15, cell 16, cell 17, cell 18}, group 3 is composed of { serving cell 3, serving cell 19, serving cell 20, serving cell 21, serving cell 22, serving cell 23, serving cell 24, serving cell 25}, and group 4 is composed of { serving cell 4, serving cell 26, serving cell 27, serving cell 28, serving cell 29, serving cell 30, serving cell 31, serving cell 32 }. The DCI formats corresponding to the serving cells configured in each group are configured to have the same size, and the starting positions of the search spaces corresponding to the serving cells in each group are configured to be the same, and the starting positions of the search spaces are determined according to the group index, fig. 17 is a schematic diagram related to the fifth embodiment of the present invention, as shown in fig. 21, the search spaces of each group are continuously placed as shown in fig. 21, and the search spaces of each group may also be placed in a random manner, an interleaving manner, or the like.

By grouping and configuring the DCI formats in each group to be the same in size and the corresponding search spaces in each group to be the same, the blind detection times of the terminal can be reduced, and the power consumption of the terminal can be saved.

EXAMPLE six

Assuming 32 serving cells are aggregated, wherein serving cell 1 is a scheduling cell, other serving cells are scheduled cells, and control channels of serving cell 1 are PDCCH and ePDCCH, fig. 22 is a schematic diagram related to a sixth embodiment of the present invention, as shown in fig. 22, then search spaces corresponding to { serving cell 2, serving cell 3, serving cell 4, …, serving cell 32} are located in PDCCH and ePDCCH regions, high-level signaling configures { serving cell 2, serving cell 3, serving cell 4} as a group, serving cell 5, serving cell 6, …, serving cell 32} as a group, because { serving cell 2, serving cell 3, serving cell 4} is a group, corresponding search spaces are distributed in PDCCH regions or ePDCCH regions, { serving cell 5, serving cell 6, …, serving cell 32} is a group, corresponding search spaces are distributed in ePDCCH regions or PDCCH regions, in the figure, the frequency domain resources corresponding to the ePDCCH are continuous, and the frequency domain resources corresponding to the ePDCCH may also be discontinuous.

By expanding the area where the search space is located, the blocking rate when a plurality of service cells are scheduled can be reduced, and the PDCCH performance is improved.

EXAMPLE seven

Assuming 32 cell aggregation, where serving cell 1 is a scheduling cell, other serving cells are scheduled cells, the control channel of serving cell 1 is ePDCCH, high-level signaling configuration { serving cell 2, serving cell 3, serving cell 4} is a group, { serving cell 5, serving cell 6, serving cell 7} is a group, { serving cell 8, serving cell 9, …, serving cell 32} is a group, because { serving cell 2, serving cell 3, serving cell 4} is a group, the corresponding search space is located in the ePDCCH first set of resource pairs, serving cell 5, serving cell 6, serving cell 7, so the corresponding search space is located in the second ePDCCH resource pair set, { serving cell 8, serving cell 9 …, serving cell 32} as a group, so the corresponding search space is located in the third ePDCCH resource pair set.

Example eight

When configuring the downlink control information, the fifth embodiment, the sixth embodiment and the seventh embodiment may be configured individually or jointly, where the corresponding packets of the fifth embodiment, the sixth embodiment and the seventh embodiment may be the same or different.

Example nine

Supposing that T is 32 downlink service cells are aggregated and self-carrier scheduling is configured;

detailed description of the preferred embodiment

The CRC length corresponding to the DCI configuring the aggregated serving cell is 24.

Detailed description of the invention

The DCI configuring the aggregated service cell comprises a 2-bit check domain;

the false alarm probability of the downlink control information is reduced by increasing the length of the CRC and/or increasing the check field, and the performance of the PDCCH is improved.

Example ten

Suppose T-32 downlink cells are aggregated and configured with self-scheduling.

Detailed description of the preferred embodiment

Configuring the total maximum blind detection times Mmax corresponding to all activated cells;

by limiting the total blind detection times, the false alarm probability of the downlink control information is reduced, and the performance of the PDCCH is improved.

Detailed description of the invention

And configuring the activated carrier waves in a time division mode. Subframe 1 activates a maximum of 16 serving cells, and subframe 2 activates a maximum of 16 serving cells.

By limiting the number of activated carriers on each subframe, the false alarm probability of downlink control information is reduced, and the performance of the PDCCH is improved.

EXAMPLE eleven

Supposing that T is 32 downlink service cells are aggregated and self-carrier scheduling is configured; before obtaining the downlink control, the UE further includes:

performing blind detection on the activated service cells according to the determined maximum blind detection times Mmax _ CC corresponding to all the activated service cells, determining the maximum blind detection times Mmax _ CC corresponding to each activated service cell according to one of the following methods, and performing blind detection on the PDCCH of each activated service cell according to the obtained maximum blind detection times Mmax _ CC corresponding to each activated service cell:

the method comprises the following steps: the Mmax _ CC corresponding to each activated service cell is equivalent;

the method 2 comprises the following steps: the Mmax _ CC corresponding to the main serving cell and/or the serving cell on the authorized spectrum is the same as the existing maximum blind detection times, and the Mmax _ CC corresponding to other activated serving cells is equivalent.

Detailed description of the preferred embodiment

Assuming that the number of activated carriers is 16 and Mmax is 800, determining Mmax _ CC by using method 1, that is, taking the whole value of Mmax _ CC corresponding to each activated cell as 50 after (800/16), and performing blind detection on the PDCCH of each activated serving cell according to the maximum blind detection number of times 50.

Detailed description of the invention

The number of activated carriers is 16, Mmax is 800, and Mmax _ CC is determined by using the method 2, then Mmax _ CC corresponding to the main serving cell is 60 (the same as the existing maximum blind detection frequency), the maximum blind detection corresponding to the remaining 15 activated serving cells is ((800-60)/15), and then rounding is performed to 49, and the PDCCH of each activated serving cell is blind detected according to the maximum blind detection frequency 50.

Detailed description of the preferred embodiment

The number of activated carriers is 16, the number of activated serving cells on an authorized carrier is 10, and the method 2 is used to determine the Mmax _ CC, so that the Mmax _ CC corresponding to the 10 activated serving cells on the authorized carrier is 60, the maximum blind detection corresponding to the remaining 6 activated serving cells is ((800-60 × 10)/6), then rounding down to 33, and the blind detection is performed on the PDCCH of each activated serving cell according to the maximum blind detection number of times 50.

The false alarm probability of the downlink control information is reduced by limiting the total blind detection times, and the performance of the PDCCH is improved.

In summary, by configuring the corresponding DCI for the aggregated serving cell according to the present invention, a problem that a terminal cannot correctly obtain downlink control information of each serving cell when aggregation of up to 32 serving cells is supported in the related art is solved, and the terminal correctly obtains the downlink control information of the serving cells supporting up to 32 aggregation is realized, so that an effect of correctly solving downlink data is achieved.

In another embodiment, a software is provided, which is used to execute the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is provided, in which the software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for configuring Downlink Control Information (DCI) is characterized by comprising the following steps:

when carrier aggregation of at most T carriers and cross-carrier scheduling is configured, configuring corresponding DCI for an aggregated serving cell by adopting the following mode:

setting a carrier indication field CIF to X bits, wherein X is a positive integer and is smaller than N; wherein N is ceil (log2(T)), and N is a positive integer;

the CIF is used for indicating a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located;

sending the DCI corresponding to the serving cell to a terminal;

and configuring a virtual carrier indication corresponding to the serving cell through signaling when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set, and the virtual carrier set is obtained according to the signaling configuration.

2. The method of claim 1, wherein configuring corresponding DCI for the aggregated serving cells further comprises:

configuring corresponding DCI for the serving cell by adopting at least one of the following rules when at most the carriers supporting the T carriers are aggregated and self-scheduling is configured:

rule 1: the CRC length corresponding to the DCI is greater than L, wherein L is 16;

rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits, and F is a positive integer greater than 0.

3. The method of claim 1, wherein configuring the virtual carrier indication corresponding to the serving cell comprises at least one of:

configuring the virtual carrier indication according to the corresponding relation between the DCI containing the CIF and the PDSCH of the serving cell;

and configuring the virtual carrier indication according to the CIF.

4. The method of claim 1, wherein sending the DCI corresponding to the serving cell to a terminal is preceded by:

grouping the aggregated serving cells.

5. The method of claim 4, wherein grouping the aggregated serving cells comprises:

configuring DCIs corresponding to all service cells in each group to be the same in size; or,

configuring that the sizes of the DCI formats corresponding to the serving cells in each group are the same and the proprietary search spaces of the serving cells are the same, wherein the proprietary search spaces are the same, which means that the starting points of the proprietary search spaces of the serving cells are the same as the search spaces.

6. The method of claim 5, wherein grouping the aggregated serving cells comprises:

and configuring a subgroup index of each group, wherein the subgroup index is used for determining a search space corresponding to each group.

7. The method of claim 4, wherein grouping the aggregated serving cells comprises:

the dedicated search spaces configured to the serving cells belonging to the same group are distributed on a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.

8. The method of claim 4, wherein grouping the aggregated serving cells comprises:

configuring a private search space of a serving cell in any one group to be located in the same resource block pair set of the ePDCCH;

configuring a set of resource block pairs of the ePDCCH where dedicated search spaces belonging to serving cells in different groups are located;

wherein the number of resource block pair sets of the ePDCCH is related to the number of packets.

9. The method of claim 2, wherein configuring the corresponding DCI for the serving cell further comprises: and activating the serving cell in a time division mode.

10. The method of claim 2, wherein configuring the corresponding DCI for the serving cell further comprises: and configuring the total maximum blind detection times corresponding to all the activated service cells.

11. The method according to any of claims 1 to 10, wherein the serving cell is a frequency division duplex, FDD, serving cell or a time division duplex, TDD, serving cell.

12. A method for receiving downlink data, comprising:

receiving downlink control information DCI; wherein, carrier aggregation of at most T carriers is configured, and when cross-carrier scheduling is configured, the DCI is configured according to the following method:

a carrier indication field CIF is X bits, wherein X is a positive integer and is smaller than N; wherein N ═ ceil (log2(T)), where N is a positive integer;

determining a serving cell where a downlink shared channel (PDSCH) corresponding to the DCI containing the CIF is located according to a Carrier Indicator Field (CIF) included in the DCI;

receiving downlink data from the determined PDSCH of the serving cell; determining a serving cell in which a downlink shared channel (PDSCH) corresponding to the DCI including the CIF is located according to a Carrier Indicator Field (CIF) included in the DCI includes: receiving a virtual carrier indication under the condition that the CIF is X bits, wherein the virtual carrier indication is used for indicating an index of the serving cell in a virtual carrier set; and acquiring the corresponding relation between the DCI containing the CIF and the PDSCH of the serving cell according to the CIF and the virtual carrier indication.

13. The method of claim 12, wherein when carrier aggregation of at most the T carriers is configured and self-scheduling is configured, the DCI is configured according to at least one of the following rules:

rule 2: the DCI comprises a check field.

14. The method according to claim 12, wherein the set of virtual carriers and/or the virtual carrier indication is obtained from signaling.

15. The method of claim 14, wherein obtaining the correspondence between the DCI containing the CIF and the PDSCH of the serving cell according to the CIF and the virtual carrier indication comprises:

and determining that the DCI containing the CIF is the DCI corresponding to the PDSCH of the serving cell under the condition that the CIF is the same as the virtual carrier indication.

16. The method of claim 13, wherein before receiving the DCI, the method further comprises:

and acquiring the corresponding activated serving cell on each subframe/radio frame according to a time division mode.

17. The method of claim 12, wherein before receiving the DCI, the method further comprises:

and carrying out blind detection on the activated service cell according to the preset total maximum blind detection times.

18. The method according to any of claims 12 to 17, wherein the serving cell is a frequency division duplex, FDD, serving cell or a time division duplex, TDD, serving cell.

19. A configuration device of Downlink Control Information (DCI), the device is applied to a base station, and is characterized by comprising:

a first configuration module, configured to configure corresponding DCI for an aggregated serving cell in the following manner when aggregation of carriers supporting at most T carriers and cross-carrier scheduling are configured:

a sending module, configured to send the DCI corresponding to the serving cell to a terminal; wherein the apparatus further comprises: a third configuration module, configured to configure, by signaling, a virtual carrier indication corresponding to the serving cell when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set, and the virtual carrier set is obtained according to the signaling configuration.

20. The apparatus of claim 19, further comprising:

a second configuration module, configured to configure, when aggregation is performed on at least multiple carriers supporting the T carriers and self-scheduling is configured, DCI corresponding to the serving cell according to at least one of the following rules:

rule 2: the DCI comprises a check field, wherein the size corresponding to the check field is F bits.

21. The apparatus of claim 19, wherein the third configuration module comprises:

a first configuration unit, configured to configure the virtual carrier indication according to a correspondence between the DCI including the CIF and the PDSCH of the serving cell; and/or the presence of a gas in the gas,

a second configuration unit, configured to configure the virtual carrier indication according to the CIF.

22. The apparatus of claim 19, further comprising:

and the grouping module is used for grouping the aggregated service cells.

23. The apparatus of claim 22, further comprising:

a fourth configuration module, configured to configure that the DCI corresponding to each serving cell in each group has the same size; or,

a fifth configuration module, configured to configure that the DCI formats corresponding to the serving cells in each group have the same size and the proprietary search spaces of the serving cells are the same, where the proprietary search spaces are the same, and the starting point of the proprietary search spaces of the serving cells and the search spaces have the same size.

24. The apparatus of claim 23, further comprising:

and a sixth configuration module, configured to configure a group index of each group, where the group index is used to determine a search space corresponding to each group.

25. The apparatus of claim 22, further comprising:

and a seventh configuration module, configured to configure the dedicated search space of the serving cell belonging to the same group to be distributed in a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.

26. The apparatus of claim 22, further comprising:

an eighth configuration module, configured to configure a same resource block pair set, where a dedicated search space of a serving cell in any one of the groups is located in an ePDCCH;

a ninth configuration module, configured to configure a set of different resource block pairs of the ePDCCH where the dedicated search spaces of the serving cells belonging to different groups are located;

27. The apparatus of claim 20, further comprising:

and the activation module is used for activating the service cell in a time division mode.

28. The apparatus of claim 20, further comprising:

and the configuration module is used for configuring the total maximum blind detection times corresponding to all the activated service cells.

29. The apparatus of any of claims 19 to 28, wherein the serving cell is a frequency division duplex, FDD, serving cell or a time division duplex, TDD, serving cell.

30. A device for receiving downlink data, the device being applied to a terminal, the device comprising:

a first receiving module, configured to receive downlink control information DCI; when carrier aggregation of at most T carriers is configured and cross-carrier scheduling is configured, the DCI is configured according to the following mode:

a determining module, configured to determine, according to a carrier indicator field CIF included in the DCI, a serving cell in which a downlink shared channel PDSCH corresponding to the DCI including the CIF is located;

a second receiving module, configured to receive downlink data from the PDSCH of the determined serving cell; wherein the determining module comprises: a receiving unit, configured to receive a virtual carrier indication when the CIF is X bits, where the virtual carrier indication is used to indicate an index of the serving cell in a virtual carrier set; a determining unit, configured to acquire, according to the CIF and the virtual carrier indication, a correspondence between the DCI including the CIF and the PDSCH of the serving cell.

31. The apparatus of claim 30, wherein the DCI when at most support carrier aggregation of the T carriers and configure self-scheduling is a DCI configured using at least one of the following rules:

rule 2: the DCI comprises a check field.

32. The apparatus according to claim 30, wherein the receiving unit is further configured to receive the set of virtual carriers and/or the indication of virtual carriers from signaling.

33. The apparatus of claim 32, wherein the determining module is further configured to determine the DCI containing the CIF as the DCI corresponding to the PDSCH of the serving cell if the CIF is the same as the virtual carrier indication.

34. The apparatus of claim 31, further comprising:

and the acquisition module is used for acquiring the corresponding activated serving cell on each subframe/wireless frame according to a time division mode.

35. The apparatus of claim 30, further comprising:

and the detection module is used for carrying out blind detection on the activated service cell according to the preset total maximum blind detection times.

36. The apparatus of any of claims 30-35, wherein the serving cell is a frequency division duplex, FDD, serving cell or a time division duplex, TDD, serving cell.