CN102858014A - Sending and receiving method and equipment of control signaling - Google Patents
Sending and receiving method and equipment of control signaling Download PDFInfo
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Abstract
The invention provides a sending and receiving method and equipment of a control signaling. The sending method comprises the steps of sending a first-grade signaling to UE (User Equipment) by a base station and utilizing the first-grade signaling to appoint a used resource of a D-PDCCH (D-Physical Downlink Control Channel) of the UE so as to detect the D-PDCCH by the UE according to the first-grade signaling, wherein the D-PDCCH is located in a PDSCH (Physical Downlink Shared Channel) region of the UE and the D-PDCCH is used for carrying scheduling information of the UE. According to the embodiment of the invention, the transmission of the scheduling information with a higher capacity is realized and the position of the scheduling information can be determined by the UE.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a method and device for sending and receiving a control signaling.
Background
In an existing Long Term Evolution (LTE) system, a minimum time unit scheduled by a base station (eNB) is one subframe, each subframe includes two slots, and each slot includes 7 symbols. For a User Equipment (UE) scheduled on a subframe, the subframe may include a Physical Downlink Control Channel (PDCCH) of the UE, and the PDCCH may be used for a Downlink scheduling grant (DL _ grant) or an Uplink scheduling grant (UL _ grant), and respectively carry scheduling information of a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH).
In a future-version LTE system, technologies such as carrier aggregation, Multiple Input Multiple Output (MIMO), Coordinated multipoint (CoMP) and the like are introduced, and heterogeneous network scenarios are also widely applied, which may cause the capacity of a PDCCH to be limited and scheduling information with higher capacity cannot be transmitted.
Disclosure of Invention
The embodiment of the invention provides a method and equipment for sending and receiving control signaling, which are used for realizing the transmission of scheduling information with higher capacity and enabling UE (user equipment) to determine the position of the scheduling information.
In one aspect, a method for sending a control signaling is provided, including:
the method comprises the steps that a base station sends a first-level signaling to UE, wherein the first-level signaling is used for indicating resources used by a D-PDCCH of the UE so that the UE can detect the D-PDCCH according to the first-level signaling, the D-PDCCH is located in a PDSCH area of the UE, and the D-PDCCH is used for carrying scheduling information of the UE.
In one aspect, a method for receiving control signaling is provided, including:
the method comprises the steps that UE receives a first-level signaling sent by a base station, wherein the first-level signaling is used for indicating resources used by a D-PDCCH of the UE, the D-PDCCH is located in a PDSCH area of the UE, and the D-PDCCH is used for carrying scheduling information of the UE;
and the UE detects the D-PDCCH according to the first-level signaling.
In one aspect, a device for sending control signaling is provided, including:
a generating module, configured to generate a first-level signaling, where the first-level signaling is used to indicate a resource used by a dedicated reference signal-based physical downlink control channel D-PDCCH of the UE, the D-PDCCH is located in a PDSCH (physical downlink shared channel) region of the UE, and the D-PDCCH is used to carry scheduling information of the UE;
and the sending module is used for sending the first-level signaling to User Equipment (UE) so that the UE can detect the D-PDCCH according to the first-level signaling.
In one aspect, a device for receiving control signaling is provided, including:
a receiving module, configured to receive a first-level signaling sent by a base station, where the first-level signaling is used to indicate a resource used by a D-PDCCH of the UE, the D-PDCCH is located in a PDSCH region of the UE, and the D-PDCCH is used to carry scheduling information of the UE;
and the detection module is used for detecting the D-PDCCH according to the first-level signaling received by the receiving module.
In the embodiment of the invention, a physical downlink control channel (DRS-based PDCCH, D-PDCCH) based on a special Reference Signal (DRS) carries scheduling information, the D-PDCCH is positioned in a PDSCH region, and the PDSCH region can bear data with larger capacity, so the scheduling information with large capacity requirement can be transmitted; the resource used by the D-PDCCH is indicated through the first-level signaling, so that the UE can determine the position of the D-PDCCH according to the first-level signaling to acquire the scheduling information carried in the D-PDCCH.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart illustrating a method of an embodiment of a method for sending control signaling according to the present invention;
FIG. 2 is a schematic diagram of a transmit signal according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for sending control signaling according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for transmitting control signaling according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for sending control signaling according to another embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for sending control signaling according to another embodiment of the present invention;
fig. 7 is a flowchart illustrating an embodiment of a method for receiving control signaling according to the present invention;
fig. 8 is a schematic structural diagram of an embodiment of a device for sending control signaling according to the present invention;
fig. 9 is a schematic structural diagram of an embodiment of a receiving device for control signaling in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to different data scheduling manners, the PDCCH may have different Downlink Control Information (DCI) formats, and the load sizes (payload sizes) of the PDCCHs corresponding to the DCI formats are generally different. The UE demodulates and decodes the PDCCH in a search space of the PDCCH according to a payload size of the PDCCH and a Control Channel Element (CCE) aggregation level. The demodulation of PDCCH in existing LTE system is based on Common Reference Signal (CRS).
The search space of the PDCCH is a set of candidate PDCCHs, and may be determined according to a Radio Network Temporary Identity (RNTI), a subframe number, and a CCE aggregation level occupied by the PDCCH, which are specific to the UE.
In a future-version LTE system, technologies such as carrier aggregation, Multiple Input Multiple Output (MIMO), Coordinated multipoint (CoMP) and the like are introduced, and heterogeneous network scenarios are also widely applied, which may cause the capacity of a PDCCH to be limited and scheduling information with higher capacity cannot be transmitted.
In order to solve the above technical problem, the present invention provides the following solutions:
fig. 1 is a flowchart of a method according to an embodiment of a method for sending control signaling in the present invention, including:
11: the method comprises the steps that a base station sends a first-level signaling to UE, wherein the first-level signaling is used for indicating resources used by a D-PDCCH of the UE so that the UE can detect the D-PDCCH according to the first-level signaling, the D-PDCCH is located in a PDSCH area of the UE, and the D-PDCCH is used for carrying scheduling information of the UE.
Fig. 2 is a schematic structural diagram of a transmitted signal in an embodiment of the present invention, and referring to fig. 2, a D-PDCCH is carried in a PDSCH region and frequency-divides with a PDSCH, where a first-level signaling is used to indicate resources used by the D-PDCCH, and the D-PDCCH carries scheduling information, where the scheduling information is used to indicate the PDSCH and may also be used to indicate the PUSCH.
Fig. 2 illustrates that the first-level signaling is located in the control channel region, and may also be located in the PDSCH region.
The first-level signaling may be carried in the PDCCH, that is, the existing PDCCH is enhanced, so that the enhanced PDCCH has a function of indicating resources used by the D-PDCCH of the UE. Other physical layer signaling may also be adopted, and the other physical layer signaling may satisfy the following condition: the number of original bits is small, e.g. 1 or 2 or 3 bits, and the channel coding is simple, e.g. repetition or block. Specifically, a transmission mode similar to a Physical hybrid retransmission Indicator Channel (PHICH) or a Physical Control Format Indicator Channel (PCFICH) in the LTE system may be adopted.
The location of the first level signaling may be known to the UE, and in this case, the UE may obtain the first level signaling from the determined location directly according to the known information. Or, the UE does not know the position of the first-level signaling, and needs to perform blind detection and determination by the UE, for example, the UE sequentially performs detection in the search space of the first-level signaling, and if decoding can be successfully performed, the first-level signaling is obtained. The search space of the first-level signaling may be statically set or determined according to the actual situation like the search space of the PDCCH.
Preferably, the first-stage signaling may be demodulated by using a Common Reference Signal (CRS) on the UE side, and may also be demodulated by using a (decoded Reference Signal, DRS).
Preferably, the first-stage signaling may indicate a resource used by the determined D-PDCCH, that is, the first-stage signaling is used to indicate a resource occupied by the D-PDCCH after encoding and rate matching, and at this time, the UE may detect the D-PDCCH according to the resource occupied by the D-PDCCH after encoding and rate matching, a DCI format, and a modulation mode. For example, if the resource indicated by the first-level signaling is three resource blocks 3, 4, and 6 to the UE, it indicates that the load of the D-PDCCH is exactly transmitted on the three resource blocks after being encoded, rate-matched, and modulated, and accordingly, the UE detects the D-PDCCH by using the number of bits that can be carried on the three resource blocks as the number of bits of the load of the D-PDCCH after being encoded and rate-matched. Wherein the DCI format may be notified by the first-level signaling or determined according to a transmission mode of the UE; alternatively, the modulation scheme may be signaled through the first level signaling or predefined. Assuming that a modulation mode is predefined as Quadrature Phase Shift Keying (QPSK), and if the DCI format is notified by a first-level signaling, the UE directly detects the D-PDCCH according to the notified DCI format and a finally encoded and rate-matched resource; if the DCI formats are determined by the transmission mode, that is, there may be multiple DCI formats, the UE needs to perform blind detection on the finally encoded and rate-matched resources according to the multiple DCI formats.
Or, the resource that can be used by the D-PDCCH may be indicated, that is, the resource used by the D-PDCCH is a search space of the D-PDCCH, and at this time, the UE may perform blind detection on the D-PDCCH in the search space according to an aggregation level of the D-PDCCH;
or the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, so that the UE can detect the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level. For example, the aggregation levels of possible resources are 1, 2, 4, and 8, and the number of candidate D-PDCCH detection positions corresponding to each aggregation level is 6, 2, and 2, respectively, there are 6+6+2+2 states in total, which is 16 states, so that the aggregation level and the corresponding candidate detection position that are adopted can be specifically notified by 4 bits in the first-level signaling, and the UE can know which aggregation level and corresponding position that are adopted by the D-PDCCH by reading the 4 bits in the first-level signaling, and then can perform D-PDCCH detection.
In the embodiment, the D-PDCCH carries the scheduling information, and the D-PDCCH is located in the PDSCH region, so that the scheduling information with a large capacity requirement can be transmitted because the PDSCH region can carry data with a large capacity; the resource used by the D-PDCCH is indicated through the first-level signaling, so that the UE can determine the position of the D-PDCCH according to the first-level signaling to acquire the scheduling information carried in the D-PDCCH.
The first level of signaling may be indicated over the full bandwidth or a subset of the full bandwidth.
Further, the indication may be performed by using an existing allocation manner of type0, type1, or type2, or the first-level signaling is used to indicate an aggregation level of the used resources and a location of the corresponding candidate D-PDCCH.
Specifically, for the full bandwidth indication, the carrier is assumed to have a full bandwidth of 20MHz, and there are 100 Resource Blocks (RBs).
When the type0, type1 or type2 allocation is adopted for indication, preferably, the type2 allocation can be adopted, that is, continuous virtual RBs are allocated to the D-PDCCH, and in this case, 13 bits are required for allocation, and the resource allocation overhead is small. When the virtual RB is mapped to the physical RB, centralized mapping or distributed mapping can be adopted, and the physical RB obtained by the centralized mapping is continuous, so that scheduling gain can be obtained; the physical RBs obtained using the distributed mapping are discontinuous, and thus a diversity gain can be obtained.
Of course, the type1 or type0 may be used, for example, when the type0 is used, 100 RBs are divided into 25 RB groups if each RB group includes 4 consecutive RBs, and 25 bits are needed to indicate the resource used by the D-PDCCH. For example, if the bit corresponding to the first RB group is 1 and the remaining bits are 0, it indicates that the first 4 RBs of the full bandwidth are used in the D-PDCCH.
In addition, the first-level signaling may further include DRS antenna port information of one UE, or DRS antenna port information corresponding to each UE in a group of UEs, where the group of UEs includes at least two UEs. Specifically, taking a group of UEs as an example, assuming that there are 5 UEs in a group, each UE may adopt 4 DRS port configurations, such as port 7, port 8, ports 7 and 8, and ports 9 and 10, such a port configuration information set may be predefined or notified through higher layer signaling, each UE needs 2 bits to carry these four configuration information, in total, 5 × 2 ═ 10 bits are needed in the first level signaling to carry the DRS port configuration information of this group of UEs, and this PDCCH shared by this group of UEs is represented by a group identifier, such as a group RNTI or other time-frequency resources. Before the UE detects the D-PDCCH each time, the first-level signaling is detected in the current subframe, the port configuration information of the D-PDCCH is acquired, and then the D-PDCCH is detected; or once the UE detects the first-level signaling and acquires the port configuration information of the D-PDCCH therein, the UE always performs D-PDCCH detection by using the port configuration information until the UE receives a new first-level signaling and acquires different port configuration information. Further, in order to improve the reliability of the first-level signaling, ACK information may be fed back to the base station for correct reception of the first-level signaling, and specifically, refer to the following embodiment corresponding to fig. 6.
The first-level signaling may further include an interleaving identifier to indicate whether the D-PDCCH employs an interleaved transmission mode. The interleaving identification can be represented by 1 bit or 2 CRC masks, and taking 1 bit as an example, if the bit is 0, it represents that the D-PDCCH does not adopt the interleaving mode, otherwise, it represents that the D-PDCCH adopts the interleaving mode. The interleaving manner is interleaving between Resource blocks, that is, interleaving with Resource blocks as granularity, or interleaving within Resource blocks, that is, a D-PDCCH of one Resource block may be distributed over a plurality of Resource blocks, and specifically, a Resource Element Group (REG) of the PDCCH may be used as minimum granularity. The interleaver of this interleaving manner may reuse the REG interleaver of the PDCCH of the LTE system. When the channel condition is not good, the base station can inform the D-PDCCH of the UE to adopt an interleaving mode for transmission, thereby improving the robustness of the performance.
For the subset indication, refer to fig. 3, fig. 3 is a flowchart illustrating another embodiment of a method for sending a control signaling according to the present invention, including:
31: the base station sends signaling indicating a subset to the UE, the subset being a set of resources that can be used by the D-PDCCH.
At this time, the D-PDCCH may only use a partial bandwidth of the full bandwidth, i.e., the partial bandwidth that the D-PDCCH may use is a subset of the full bandwidth. The subset may be a set of RBs or a set of RB pairs.
Wherein one RB occupies 12 subcarriers in the frequency domain and one slot in the corresponding time domain (each slot includes 7 symbols); one RB pair occupies 12 subcarriers in the frequency domain and one subframe (each subframe includes 14 symbols) in the corresponding time domain.
For example, the base station divides the full bandwidth into 4 subsets, each of which may include one or more RBs (or RB pairs), and each of which may include the same or different number of RBs (or RB pairs). Of course, the UE side is also configured to know the RB (or RB pair) corresponding to each subset. And the base station determines that the D-PDCCH is transmitted on the first subset, and informs the UE of the D-PDCCH transmitted on the first subset by adopting the signaling for indicating the subset.
The signaling for indicating the subset may be higher layer signaling, such as broadcast signaling, multicast signaling, or Radio Resource Control (RRC) dedicated signaling.
32: and the base station sends first-level signaling to the UE, wherein the first-level signaling is used for indicating one subset to which the resources used by the D-PDCCH belong.
In particular, the indication manner of type0, type1 or type2 in the existing system can also be adopted, and the indication range is within the subset.
Further, the number of the subsets may be at least two, and in this case, the first-level signaling may be specifically used to indicate the subset to which the resource used by the D-PDCCH belongs. For example, if the number of the subsets is 4, the first-level signaling may use 2 bits to indicate which of the 4 subsets the resource used by the D-PDCCH belongs to.
Further, the first-level signaling may carry subset information of resources used by D-PDCCHs of at least two UEs, that is, the first-level signaling may include indication information of the resources used by the D-PDCCHs of the at least two UEs, and it is assumed that each UE needs 2 bits, and if the indication information of 4 UEs needs to be carried, the first-level signaling includes 8 bits. The 8 bits may be carried by PDCCH, and accordingly, each UE selects one of the 4 subsets to perform D-PDCCH detection by reading the 2 bits of PDCCH corresponding to the UE.
In addition, at least two subsets may implicitly correspond to DRS ports, e.g., 1 st, 2 nd subsets correspond to DRS ports 7, and 3 rd, 4 th subsets correspond to DRS ports 8. In this embodiment, by dividing the subsets, the overhead of the first-level signaling can be reduced, the performance can be improved, multi-UE statistical multiplexing can be realized, the overhead of the D-PDCCH can be further reduced, and the scheduling or diversity gain of the D-PDCCH can be maintained. In addition, multiple subsets of the UE may implicitly correspond to ports of the DRS, so as to save notification overhead of the DRS ports.
Fig. 4 is a flowchart illustrating another embodiment of a method for sending control signaling according to the present invention, including:
41: and the base station carries the D-PDCCH on a second carrier for transmission.
42: and the base station sends a first-level signaling on a first carrier, wherein the first-level signaling is used for indicating the resources used by the D-PDCCH.
The first carrier may be a backward compatible carrier, and the second carrier may be a non-backward compatible carrier, such as an extension carrier.
That is, in this embodiment, in a carrier aggregation scenario, the first-level signaling of the first carrier may indicate the D-PDCCH on the second carrier.
The second carrier mentioned above is preferably an extension carrier, which belongs to a non-backward compatible carrier. Optionally, the second carrier may also be a backward compatible carrier.
The D-PDCCH described above may schedule data transmission on multiple carriers.
In this embodiment, since data transmission of the UE in the existing system cannot be performed on the extension carrier, D-PDCCH resources do not need to be reserved or scheduled on the backward compatible carrier when the D-PDCCH is placed on the extension carrier, which reduces overhead caused by the reservation or scheduling of the D-PDCCH on the backward compatible carrier and reduces the impact on the UE in the previous release system.
Fig. 5 is a flowchart illustrating another embodiment of a method for sending a control signaling according to the present invention, including:
51: and the base station sends a first-stage signaling to the UE, wherein the first-stage signaling comprises an identification bit, and the identification bit indicates that the first-stage signaling is used for scheduling data or D-PDCCH.
In the embodiment of the present invention, scheduling the D-PDCCH may be understood as including a first-level signaling for indicating resources used by the D-PDCCH.
For example, the first-level signaling includes a flag bit of one bit, and when the flag bit is 1, it indicates that the D-PDCCH is scheduled, and at this time, the indication of the resource used by the D-PDCCH may be performed in the manner described above. When the flag is 0, it indicates scheduling data, and at this time, the first level signaling may be used as a PDCCH. The identity may also be represented by other means, such as different RNTIs, time-frequency resources, etc.
In this embodiment, when the channel condition is poor, the performance of the D-PDCCH demodulated based on the DRS is poor, and at this time, the PDCCH scheduling based on the CRS demodulation may be backed, specifically, a scheduling manner of DCI 0 or 1A may be used, that is, the first-stage signaling is transmitted by using transmit diversity or a single antenna port mode.
The scheduling condition can be adjusted according to the actual condition, and the actual requirement is further met.
Fig. 6 is a flowchart illustrating another embodiment of a method for sending control signaling according to the present invention, including:
61: a base station sends a first-level signaling to a UE, wherein the first-level signaling is used for indicating resources used by a D-PDCCH of the UE;
the D-PDCCH may be scheduled using first level signaling as described above.
62: and the base station receives the ACK/NACK information which is fed back by the UE and corresponds to the D-PDCCH or the first-level signaling.
Wherein the resource used by the ACK/NACK information can be determined according to a first level signaling. Specifically, the ACK/NACK information may implicitly correspond to the resource occupied by the first-level signaling, for example, if the first-level signaling is transmitted on the resource-1, and the resource-1 corresponds to the feedback resource-1, the ACK/NACK information is transmitted on the feedback resource-1. Or explicitly notified by the first-level signaling, for example, the information of the feedback resource is explicitly carried in the first-level signaling.
Further, this embodiment may further include: the base station determines the receiving condition of the UE according to the feedback condition of the UE, which may specifically include:
preferably, if the feedback information of the corresponding D-PDCCH of the UE is not received, it is determined that the UE does not correctly detect the first-level signaling; if NACK information of a corresponding D-PDCCH fed back by the UE is received, determining that the UE correctly detects the first-level signaling but does not correctly detect the D-PDCCH; and if the ACK information corresponding to the D-PDCCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling, and the D-PDCCH is correctly detected.
Further, the UE may combine the feedback of whether the D-PDCCH is received correctly with the feedback of whether the PDSCH is received correctly, for example, by using joint coding. Specifically, if the ACK/NACK implicit PUCCH format 1b resource acquired according to the first-level signaling is used, two bits may be fed back, where each bit corresponds to ACK/NACK feedback of the D-PDCCH and the PDSCH, respectively, and if each ACK/NACK original bit is more than one bit, the bits are compressed into one bit in a bundling manner. If the method of explicitly indicating the ACK/NACK resources in the first-level signaling is adopted, at least two PUCCH format 1a/1b resources or at least one PUCCH format 3 resource can be specifically notified, and for the former, the UE can feed back the ACK/NACK corresponding to the D-PDCCH and the PDSCH on the notified PUCCH resources in a channel selection mode; for the latter, the UE may feed back ACK/NACK corresponding to the D-PDCCH and the PDSCH on the notified PUCCH resource in a joint coding manner. For example, the PDSCH employs dual codeword transmission, so 2-bit ACK/NACK needs to be fed back, the D-PDCCH employs single codeword transmission, and 1-bit ACK/NACK is correspondingly fed back, and the combination of the two is considered jointly, and the following states are: when the D-PDCCH is received correctly, the feedback corresponding to the PDSCH has four states, and if joint coding is adopted, the states can be expressed as {100, 101, 110, 111 }; when the first-level signaling is received correctly but the D-PDCCH is not received correctly, the condition of the PDSCH does not need to be considered at the moment, namely, only one state exists, and if joint coding is adopted, the state can be expressed as {000 }; the last situation is that when the first-level signaling is correctly received, the UE cannot acquire the PUCCH resource, and therefore the UE does not feed back ACK/NACK.
Or, optionally, if the feedback information corresponding to the first-level signaling of the UE is not received, determining that the UE does not correctly detect the first-level signaling; if ACK information corresponding to the first-level signaling fed back by the UE is received and feedback information corresponding to the PDSCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling and correctly detect the D-PDCCH; and if the ACK information corresponding to the first-stage signaling fed back by the UE is received but the feedback information corresponding to the PDSCH fed back by the UE is not received, determining that the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH. The feedback information of the PDSCH may be ACK information or NACK information of the PDSCH.
Fig. 7 is a flowchart illustrating an embodiment of a method for receiving a control signaling according to the present invention, including:
71: the method comprises the steps that UE receives a first-level signaling sent by a base station, wherein the first-level signaling is used for indicating resources used by a D-PDCCH of the UE, the D-PDCCH is located in a PDSCH area of the UE, and the D-PDCCH is used for carrying scheduling information of the UE;
72: and the UE detects the D-PDCCH according to the first-level signaling.
The method can comprise the following steps: if the resources used by the D-PDCCH are the resources occupied by the D-PDCCH after coding and rate matching, the UE detects the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a DCI format and a modulation mode; or, if the resource used by the D-PDCCH comprises a search space of the D-PDCCH, the UE detects the D-PDCCH in the search space according to the aggregation level of the D-PDCCH; or, if the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, the UE detects the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
Further, the first level signaling is used to indicate a location of a used resource of the D-PDCCH in a subset of a full bandwidth, where the subset is a set of resources that can be used by the D-PDCCH, and the method further includes: and the UE receives signaling which is sent by the base station and used for indicating the subset, wherein the signaling can be multicast signaling, broadcast signaling or RRC (radio resource control) proprietary signaling.
Further, the method can also comprise the following steps: and the UE feeds back ACK/NACK information to the base station according to the first-stage signaling and the detection condition of the D-PDCCH.
The method specifically comprises the following steps:
if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-level signaling but does not successfully detect the D-PDCCH, feeding back NACK information corresponding to the D-PDCCH; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the D-PDCCH; or if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the first-level signaling is not fed back; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the first-stage signaling and feedback information corresponding to the PDSCH; and if the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH, feeding back ACK information corresponding to the first-stage signaling but not feeding back feedback information corresponding to the PDSCH. The feedback information of the PDSCH may be ACK information or NACK information of the PDSCH.
In this embodiment, the first-level signaling specific indication method may refer to the description of the sending method above.
In the embodiment, the D-PDCCH carries the scheduling information, and the D-PDCCH is located in the PDSCH region, so that the scheduling information with a large capacity requirement can be transmitted because the PDSCH region can carry data with a large capacity; the resource used by the D-PDCCH is indicated through the first-level signaling, so that the UE can determine the position of the D-PDCCH according to the first-level signaling to acquire the scheduling information carried in the D-PDCCH.
Fig. 8 is a schematic structural diagram of an embodiment of a sending device for control signaling according to the present invention, where the device may be a device for executing the sending method, and the device may specifically be a base station. The device comprises a generating module 81 and a sending module 82; the generating module 81 is configured to generate a first-level signaling, where the first-level signaling is used to indicate a resource used by a dedicated reference signal-based physical downlink control channel D-PDCCH of the UE, the D-PDCCH is located in a PDSCH region of a physical downlink shared channel of the UE, and the D-PDCCH is used to carry scheduling information of the UE; the sending module 82 is configured to send the first-level signaling to a user equipment UE, so that the UE detects the D-PDCCH according to the first-level signaling.
In one embodiment, if the first level signaling is used to indicate a location of a resource used by the D-PDCCH in a subset of a full bandwidth, the apparatus further comprises: a notification module, configured to configure the subset to the UE through multicast signaling, broadcast signaling, or RRC dedicated signaling.
In one embodiment, the resources used by the D-PDCCH indicated by the first-level signaling sent by the sending module are resources occupied by the D-PDCCH after coding and rate matching, so that the UE detects the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a downlink control information DCI format and a modulation mode, where the DCI format is notified by the first-level signaling or determined according to a transmission mode of the UE, and the modulation mode is notified by the first-level signaling or predefined; or the resource used by the D-PDCCH indicated by the first-stage signaling sent by the sending module is a search space of the D-PDCCH, so that the UE detects the D-PDCCH in the search space according to an aggregation level of the D-PDCCH; or, the resource used by the D-PDCCH indicated by the first-stage signaling sent by the sending module is a resource location of a corresponding candidate D-PDCCH in a search space of an aggregation level adopted by the D-PDCCH, so that the UE detects the D-PDCCH at the resource location of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
In one embodiment, the number of the subsets notified by the notification module is at least two, and the first-level signaling is used for indicating one subset to which the resources used by the D-PDCCH belong; at least a subset of the two corresponds to a Dedicated Reference Signal (DRS) port of the UE; and/or the first-level signaling carries subset information of resources used by the D-PDCCHs of at least two UEs.
In one embodiment, the first-level signaling sent by the sending module is further configured to carry: the DRS antenna port information of the UE or DRS antenna port information corresponding to each UE in a group to which the UE belongs, where the group includes at least two UEs.
In one embodiment, the sending module sends the first-level signaling carried on a first carrier, and the D-PDCCH is carried on a second carrier, where the first carrier is a backward-compatible carrier; the second carrier is a non-backward compatible carrier.
In an embodiment, the first-level signaling sent by the sending module is further used for scheduling data, the first-level signaling includes an identification bit, when a value of the identification bit is a value indicating scheduling of a D-PDCCH, the first-level signaling is used for indicating a resource used by the D-PDCCH of the UE, and when the value of the identification bit is a value indicating scheduling of data, the first-level signaling is used for scheduling of data.
In one embodiment, the apparatus may further include: a receiving module, configured to receive ACK/NACK information corresponding to the D-PDCCH fed back by the UE, or receive ACK/NACK information corresponding to the first-level signaling fed back by the UE; and the resources used by the ACK/NACK information implicitly correspond to the resources occupied by the first-level signaling or are explicitly notified through the first-level signaling.
In one embodiment, the apparatus may further include: a determining module, configured to determine that the UE does not correctly detect the first-level signaling if the feedback information of the corresponding D-PDCCH of the UE is not received; if NACK information of a corresponding D-PDCCH fed back by the UE is received, determining that the UE correctly detects the first-level signaling but does not successfully detect the D-PDCCH; if ACK information corresponding to the D-PDCCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling, and the D-PDCCH is correctly detected; or, if the feedback information corresponding to the first-level signaling of the UE is not received, determining that the UE does not correctly detect the first-level signaling; if ACK information corresponding to the first-level signaling fed back by the UE is received and feedback information corresponding to the PDSCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling and correctly detect the D-PDCCH; if NACK information corresponding to the first-level signaling fed back by the UE is received, but the feedback information corresponding to the PDSCH fed back by the UE is not received, determining that the UE correctly detects the first-level signaling but not correctly detects the D-PDCCH; and if NACK information corresponding to the first-level signaling fed back by the UE is received, determining that the UE does not correctly detect the first-level signaling.
In an embodiment, the first-level signaling sent by the sending module is carried in a PDCCH, or the first-level signaling is physical layer signaling that satisfies the following conditions: the original number of bits is less than the set number and the channel coding is repetition coding or block coding.
In one embodiment, the first level signaling sent by the sending module is carried in a control channel region or a PDSCH region.
In an embodiment, the location of the first level signaling sent by the sending module is known at the UE side, or the location of the first level signaling is determined by the UE through blind detection.
In the embodiment, the D-PDCCH carries the scheduling information, and the D-PDCCH is located in the PDSCH region, so that the scheduling information with a large capacity requirement can be transmitted because the PDSCH region can carry data with a large capacity; the resource used by the D-PDCCH is indicated through the first-level signaling, so that the UE can determine the position of the D-PDCCH according to the first-level signaling to acquire the scheduling information carried in the D-PDCCH.
Fig. 9 is a schematic structural diagram of an embodiment of a receiving device for controlling signaling according to the present invention, where the device may be a device for executing the receiving method, and the device may specifically be a UE. The device comprises a receiving module 91 and a detecting module 92; the receiving module 91 is configured to receive a first-level signaling sent by a base station, where the first-level signaling is used to indicate a resource used by a D-PDCCH of the UE, the D-PDCCH is located in a PDSCH region of the UE, and the D-PDCCH is used to carry scheduling information of the UE; the detection module 92 is configured to detect the D-PDCCH according to the first-level signaling received by the receiving module.
In one embodiment, if the first level signaling is used to indicate a location of a resource used by the D-PDCCH in a subset of a full bandwidth, where the subset is a set of resources that the D-PDCCH may use, that is, a set of resources that the D-PDCCH can use, the apparatus further includes: a learning module, configured to learn the subset through multicast signaling, broadcast signaling, or RRC dedicated signaling.
In one embodiment, the detection module is specifically configured to: if the resources used by the D-PDCCH are the resources occupied by the D-PDCCH after coding and rate matching, the UE detects the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a DCI format and a modulation mode, wherein the DCI format is informed through the first-level signaling or determined according to the transmission mode of the UE, and the modulation mode is informed through the first-level signaling or predefined; or, if the resource used by the D-PDCCH comprises a search space of the D-PDCCH, the UE detects the D-PDCCH in the search space according to the aggregation level of the D-PDCCH; or, if the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, the UE detects the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
In one embodiment, the apparatus may further comprise: and the feedback module is used for feeding back ACK/NACK information to the base station according to the first-stage signaling and the detection condition of the D-PDCCH.
In one embodiment, the feedback module is specifically configured to: if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-level signaling but does not successfully detect the D-PDCCH, feeding back NACK information corresponding to the D-PDCCH; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the D-PDCCH; or if the UE does not correctly detect the first-level signaling, not feeding back the feedback information corresponding to the D-PDCCH; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the D-PDCCH and feedback information corresponding to the PDSCH; and if the UE correctly detects the first-level signaling but not correctly detects the D-PDCCH, feeding back NACK information corresponding to the D-PDCCH but not feeding back feedback information corresponding to the PDSCH.
In one embodiment, the detection module is specifically configured to: and demodulating the first-stage signaling based on the DRS or the CRS, and detecting the D-PDCH according to the demodulated first-stage signaling.
In the embodiment, the D-PDCCH carries the scheduling information, and the D-PDCCH is located in the PDSCH region, so that the scheduling information with a large capacity requirement can be transmitted because the PDSCH region can carry data with a large capacity; the resource used by the D-PDCCH is indicated through the first-level signaling, so that the UE can determine the position of the D-PDCCH according to the first-level signaling to acquire the scheduling information carried in the D-PDCCH.
It will be appreciated that the relevant features of the method and apparatus described above are referred to one another.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (36)
1. A method for transmitting control signaling, comprising:
the method comprises the steps that a base station sends a first-level signaling to User Equipment (UE), wherein the first-level signaling is used for indicating resources used by a physical downlink control channel (D-PDCCH) of the UE based on a dedicated reference signal, so that the UE detects the D-PDCCH according to the first-level signaling, the D-PDCCH is located in a Physical Downlink Shared Channel (PDSCH) region of the UE, and the D-PDCCH is used for carrying scheduling information of the UE.
2. The method of claim 1, wherein the first level signaling is used to indicate a location of a resource used by the D-PDCCH in a full bandwidth or a subset of the full bandwidth, wherein the full bandwidth or the subset is a set of resources that can be used by the D-PDCCH, and wherein the subset is configured to the UE by multicast signaling, broadcast signaling, or Radio Resource Control (RRC) -specific signaling.
3. The method according to claim 1 or 2,
the resources used by the D-PDCCH are the resources occupied by the D-PDCCH after coding and rate matching, so that the UE can detect the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a Downlink Control Information (DCI) format and a modulation mode, wherein the DCI format is notified through the first-level signaling or determined according to a transmission mode of the UE, and the modulation mode is notified or predefined through the first-level signaling; or,
the resource used by the D-PDCCH is a search space of the D-PDCCH, so that the UE can detect the D-PDCCH in the search space according to the aggregation level of the D-PDCCH; or,
and the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, so that the UE can detect the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
4. The method of claim 2,
the number of the subsets is at least two, and the first-level signaling is used for indicating one subset to which the resources used by the D-PDCCH belong; at least a subset of the two corresponds to a Dedicated Reference Signal (DRS) port of the UE; and/or the presence of a gas in the gas,
the first-level signaling carries subset information of resources used by D-PDCCHs of at least two UEs.
5. The method of claim 1, wherein the first level signaling is further configured to carry: the DRS antenna port information of the UE or DRS antenna port information corresponding to each UE in a group to which the UE belongs, where the group includes at least two UEs.
6. The method of claim 1, wherein the first level signaling is carried on a first carrier, wherein the D-PDCCH is carried on a second carrier, and wherein the first carrier is a backward compatible carrier; the second carrier is a non-backward compatible carrier.
7. The method of claim 1, wherein the first-level signaling is further used for scheduling data, wherein the first-level signaling includes an identification bit, and wherein the first-level signaling is used for indicating a resource used by a D-PDCCH of the UE when a value of the identification bit indicates that the D-PDCCH is scheduled, and wherein the first-level signaling is used for scheduling data when the value of the identification bit indicates that the data is scheduled.
8. The method according to any one of claims 1-7, further comprising:
the base station receives ACK/NACK (acknowledgement/negative acknowledgement) information, fed back by the UE, corresponding to the D-PDCCH, or the base station receives ACK/NACK information, fed back by the UE, corresponding to the first-level signaling;
and the resources used by the ACK/NACK information implicitly correspond to the resources occupied by the first-level signaling or are explicitly notified through the first-level signaling.
9. The method of claim 8, further comprising:
if the feedback information of the corresponding D-PDCCH of the UE is not received, determining that the UE does not correctly detect the first-level signaling; if Negative Acknowledgement (NACK) information of a corresponding D-PDCCH fed back by the UE is received, determining that the UE correctly detects the first-level signaling but not the D-PDCCH; if receiving ACK (acknowledgement) information, fed back by the UE, of the corresponding D-PDCCH, determining that the UE correctly detects the first-level signaling and correctly detects the D-PDCCH;
or,
if the feedback information corresponding to the first-level signaling of the UE is not received, determining that the UE does not correctly detect the first-level signaling; if ACK information corresponding to the first-level signaling fed back by the UE is received and feedback information corresponding to the PDSCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling and correctly detect the D-PDCCH; and if the ACK information corresponding to the first-stage signaling fed back by the UE is received but the feedback information corresponding to the PDSCH fed back by the UE is not received, determining that the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH.
10. The method according to any of claims 1-7, wherein the first level signaling is carried in a physical downlink control channel, PDCCH, or wherein the first level signaling is physical layer signaling that satisfies the following condition: the original number of bits is less than the set number and the channel coding is repetition coding or block coding.
11. The method of any of claims 1-7, wherein the first level signaling is carried in a control channel region or a PDSCH region.
12. The method according to any of claims 1-7, wherein the location of the first level signaling is known at the UE side or determined by the UE through blind detection.
13. A method for receiving control signaling, comprising:
user Equipment (UE) receives a first-level signaling sent by a base station, wherein the first-level signaling is used for indicating resources used by a physical downlink control channel (D-PDCCH) of the UE based on a dedicated reference signal, the D-PDCCH is positioned in a Physical Downlink Shared Channel (PDSCH) area of the UE, and the D-PDCCH is used for carrying scheduling information of the UE;
and the UE detects the D-PDCCH according to the first-level signaling.
14. The method of claim 13, wherein the first level signaling is used to indicate a location of a resource used by the D-PDCCH in a full bandwidth or a subset of the full bandwidth, wherein the full bandwidth or the subset is a set of resources that can be used by the D-PDCCH, and wherein the UE knows the subset through multicast signaling, broadcast signaling, or radio resource control, RRC, dedicated signaling.
15. The method of claim 13, wherein the UE detects the D-PDCCH according to the first level signaling, comprising:
if the resources used by the D-PDCCH are the resources occupied by the D-PDCCH after coding and rate matching, the UE detects the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a Downlink Control Information (DCI) format and a modulation mode, wherein the DCI format is notified through the first-level signaling or determined according to a transmission mode of the UE, and the modulation mode is notified or predefined through the first-level signaling; or,
if the resource used by the D-PDCCH is a search space of the D-PDCCH, the UE detects the D-PDCCH in the search space according to the aggregation level of the D-PDCCH; or,
and if the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, the UE detects the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
16. The method according to any one of claims 13-15, further comprising:
and the UE feeds back ACK/NACK information to the base station according to the first-stage signaling and the detection condition of the D-PDCCH.
17. The method as claimed in claim 16, wherein the UE feeds back ACK/NACK information to the base station according to the first-level signaling and detection condition of D-PDCCH, comprising:
if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-level signaling but does not correctly detect the D-PDCCH, feeding back Negative Acknowledgement (NACK) information corresponding to the D-PDCCH; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK (acknowledgement character) information corresponding to the D-PDCCH; or,
if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the first-stage signaling and feedback information corresponding to the PDSCH; and if the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH, feeding back NACK information corresponding to the first-stage signaling but not feeding back feedback information corresponding to the PDSCH.
18. The method according to any of claims 13-15, wherein the UE detecting the D-PDCCH according to the first level signaling comprises:
and the UE demodulates the first-stage signaling based on a Dedicated Reference Signal (DRS) or a Common Reference Signal (CRS), and detects the D-PDCH according to the demodulated first-stage signaling.
19. A device for transmitting control signaling, comprising:
a generating module, configured to generate a first-level signaling, where the first-level signaling is used to indicate a resource used by a dedicated reference signal-based physical downlink control channel D-PDCCH of a UE, the D-PDCCH is located in a PDSCH (physical downlink shared channel) region of the UE, and the D-PDCCH is used to carry scheduling information of the UE;
and the sending module is used for sending the first-level signaling to User Equipment (UE) so that the UE can detect the D-PDCCH according to the first-level signaling.
20. The apparatus of claim 19, wherein if the first level of signaling is used to indicate a position of the resource used by the D-PDCCH in a subset of a full bandwidth, the apparatus further comprises:
a notification module configured to configure the subset to the UE through multicast signaling, broadcast signaling, or radio resource control, RRC, proprietary signaling.
21. The apparatus according to claim 19, wherein the resources used by the D-PDCCH indicated by the first-level signaling sent by the sending module are resources occupied after the D-PDCCH is coded and rate-matched; or,
the resource used by the D-PDCCH indicated by the first-stage signaling sent by the sending module is a search space of the D-PDCCH; or,
the resource used by the D-PDCCH indicated by the first-stage signaling sent by the sending module is the resource position of a corresponding candidate D-PDCCH in a search space of an aggregation level adopted by the D-PDCCH.
22. The apparatus of claim 20,
the notification module notifies at least two subsets, and the first-level signaling is used for indicating one subset to which the resources used by the D-PDCCH belong; a subset of the at least two corresponds to a Dedicated Reference Signal (DRS) port of the UE;
and/or the presence of a gas in the gas,
the first-level signaling sent by the sending module carries subset information of resources used by D-PDCCHs of at least two UEs.
23. The apparatus of claim 19, wherein the first-level signaling sent by the sending module is further configured to carry: the DRS antenna port information of the UE or DRS antenna port information corresponding to each UE in a group to which the UE belongs, where the group includes at least two UEs.
24. The apparatus of claim 19, wherein the sending module sends the first level signaling carried on a first carrier and the D-PDCCH carried on a second carrier, the first carrier being a backward compatible carrier; the second carrier is a non-backward compatible carrier.
25. The apparatus of claim 19, wherein the first-level signaling sent by the sending module is further used for scheduling data, and the first-level signaling includes an identification bit, and when a value of the identification bit is a value indicating scheduling D-PDCCH, the first-level signaling is used for indicating a resource used by D-PDCCH of the UE, and when a value of the identification bit is a value indicating scheduling data, the first-level signaling is used for scheduling data.
26. The apparatus according to any one of claims 19-25, further comprising:
a receiving module, configured to receive ACK/NACK information corresponding to the D-PDCCH fed back by the UE, or receive ACK/NACK information corresponding to the first-level signaling fed back by the UE; and the resources used by the ACK/NACK information implicitly correspond to the resources occupied by the first-level signaling or are explicitly notified through the first-level signaling.
27. The apparatus of claim 26, further comprising:
a determining module, configured to determine that the UE does not correctly detect the first-level signaling if the feedback information of the corresponding D-PDCCH of the UE is not received; if Negative Acknowledgement (NACK) information of a corresponding D-PDCCH fed back by the UE is received, determining that the UE correctly detects the first-level signaling but not the D-PDCCH; if receiving ACK (acknowledgement) information, fed back by the UE, of the corresponding D-PDCCH, determining that the UE correctly detects the first-level signaling and correctly detects the D-PDCCH; or, if the feedback information corresponding to the first-level signaling of the UE is not received, determining that the UE does not correctly detect the first-level signaling; if ACK information corresponding to the first-level signaling fed back by the UE is received and feedback information corresponding to the PDSCH fed back by the UE is received, the UE is determined to correctly detect the first-level signaling and correctly detect the D-PDCCH; and if the ACK information corresponding to the first-stage signaling fed back by the UE is received but the feedback information corresponding to the PDSCH fed back by the UE is not received, determining that the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH.
28. The apparatus according to any one of claims 19-25, wherein the first level signaling sent by the sending module is carried in PDCCH, or wherein the first level signaling sent by the sending module is physical layer signaling that satisfies the following condition: the original number of bits is less than the set number and the channel coding is repetition coding or block coding.
29. The apparatus of any one of claims 19-25, wherein the first level signaling sent by the sending module is carried in a control channel region or a PDSCH region.
30. The apparatus of any of claims 19-25, wherein the location of the first level signaling sent by the sending module is known at the UE side, or wherein the location of the first level signaling is determined by the UE through blind detection.
31. A receiving device for control signaling, comprising:
a receiving module, configured to receive a first-level signaling sent by a base station, where the first-level signaling is used to indicate a resource used by a dedicated reference channel-based physical downlink control channel D-PDCCH of a user equipment UE, and the D-PDCCH is located in a PDSCH (physical downlink shared channel) region of the UE and is used to carry scheduling information of the UE;
and the detection module is used for detecting the D-PDCCH according to the first-level signaling received by the receiving module.
32. The apparatus of claim 31, wherein if the first level signaling is used to indicate a location of a resource used by the D-PDCCH in a subset of a full bandwidth, the subset being a set of resources that can be used by the D-PDCCH, the apparatus further comprises:
a learning module, configured to learn the subset through multicast signaling, broadcast signaling, or radio resource control RRC dedicated signaling.
33. The device of claim 31, wherein the detection module is specifically configured to:
if the resources used by the D-PDCCH are the resources occupied by the D-PDCCH after coding and rate matching, the UE detects the D-PDCCH according to the resources occupied by the D-PDCCH after coding and rate matching, a Downlink Control Information (DCI) format and a modulation mode, wherein the DCI format is notified through the first-level signaling or determined according to a transmission mode of the UE, and the modulation mode is notified or predefined through the first-level signaling; or,
if the resource used by the D-PDCCH is a search space of the D-PDCCH, the UE detects the D-PDCCH in the search space according to the aggregation level of the D-PDCCH; or,
and if the resource used by the D-PDCCH is the resource position of the corresponding candidate D-PDCCH in the search space of the aggregation level adopted by the D-PDCCH, the UE detects the D-PDCCH on the resource position of the candidate D-PDCCH corresponding to the aggregation level according to the aggregation level.
34. The apparatus according to any one of claims 31-33, further comprising:
and the feedback module is used for feeding back acknowledgement/negative acknowledgement (ACK/NACK) information to the base station according to the first-level signaling and the detection condition of the D-PDCCH.
35. The device of claim 34, wherein the feedback module is specifically configured to:
if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-level signaling but does not correctly detect the D-PDCCH, feeding back Negative Acknowledgement (NACK) information corresponding to the D-PDCCH; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK (acknowledgement character) information corresponding to the D-PDCCH; or,
if the UE does not correctly detect the first-level signaling, the feedback information corresponding to the D-PDCCH is not fed back; if the UE correctly detects the first-stage signaling and the D-PDCCH, feeding back ACK information corresponding to the D-PDCCH and feedback information corresponding to the PDSCH; and if the UE correctly detects the first-stage signaling but not correctly detects the D-PDCCH, feeding back ACK information corresponding to the D-PDCCH but not feeding back feedback information corresponding to the PDSCH.
36. The device according to any of claims 31-33, wherein the detection module is specifically configured to:
and demodulating the first-stage signaling based on a Dedicated Reference Signal (DRS) or a Common Reference Signal (CRS), and detecting the D-PDCH according to the demodulated first-stage signaling.
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| PCT/CN2012/078070 WO2013000440A1 (en) | 2011-06-30 | 2012-07-02 | Method and device for sending and receiving control signalling |
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| WO2014110815A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Detection method, transmission method and apparatus for common control channel |
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