CN110351746B - User equipment and method and device for detecting physical downlink control channel thereof - Google Patents

User equipment and method and device for detecting physical downlink control channel thereof Download PDF

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CN110351746B
CN110351746B CN201810306209.9A CN201810306209A CN110351746B CN 110351746 B CN110351746 B CN 110351746B CN 201810306209 A CN201810306209 A CN 201810306209A CN 110351746 B CN110351746 B CN 110351746B
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combination
pdcch
aggregation level
pdcch candidate
aggregation
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CN110351746A (en
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周化雨
樊婷婷
刘萌萌
黄甦
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract

The method for detecting the user equipment and the physical downlink control channel thereof comprises the following steps: determining a configuration of an aggregation level combination or a PDCCH candidate combination; determining an aggregation level combination or a PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, wherein the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate; and blind detecting PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination. The invention improves the robustness of the PDCCH, avoids overlarge continuous resources corresponding to the PDCCH with a certain high aggregation level, eliminates the conflict between the improvement of the robustness of the PDCCH and the avoidance of the blocking of the PDCCH resources allocated by the network, and can well take the two aspects into account.

Description

User equipment and method and device for detecting physical downlink control channel thereof
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a user equipment and a method and an apparatus for detecting a physical downlink control channel thereof.
Background
A PDCCH (Physical Downlink Control Cnannel) is carried on a Control Resource Set (CORESET). The PDCCH is composed of one or more CCEs (Control Channel elements). One CCE is composed of a plurality of REGs (Resource Element groups) (default is 6), one REG corresponding to one Physical Resource Block (PRB) on one OFDM symbol.
In the process of wireless communication, a user equipment needs to detect a PDCCH in a Search space (Search space). Since the ue usually cannot predict in advance where the information to be received is, the above procedure for detecting PDCCH is usually blind detection, i.e. blind detection of possible PDCCH candidates.
One search space may contain one or more Aggregation levels (Aggregation levels), for example, the Aggregation levels may be 1, 2, 4, 8, etc., one Aggregation level may contain zero or one or more PDCCH candidates, and the starting CCE position of each PDCCH candidate may be calculated by a formula.
In a high Reliable Low Latency Communication (URLLC) scenario, it is often desirable to improve the robustness of the PDCCH. A higher aggregation level is beneficial to improve the robustness of the PDCCH, but also results in blocking of PDCCH resources allocated by the network. This is because PDCCH resources (CCE resources) are contiguous, and a large contiguous resource corresponding to a PDCCH of a certain high aggregation level may cause other PDCCHs to have no contiguous resource.
In the prior art, only a compromise selection can be made between improving the robustness of the PDCCH and avoiding the blocking of PDCCH resources allocated by the network, and the optimal performance can not be achieved in the two aspects at the same time.
Disclosure of Invention
The technical problem solved by the invention is as follows: how to improve the robustness of the PDCCH and avoid the blocking of PDCCH resources allocated by a network.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for detecting a physical downlink control channel, including:
determining a configuration of an aggregation level combination or a PDCCH candidate combination;
determining an aggregation level combination or a PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, wherein the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate;
blind-detecting PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination;
the configuration of the aggregation level combination is determined by the search space configuration corresponding to the member aggregation level contained in the combination, and the configuration of the PDCCH candidate combination is determined by the search space configuration corresponding to the member PDCCH candidate contained in the combination.
Optionally, the aggregation level combination or the PDCCH candidate combination consists of 2-3 member aggregation levels or member PDCCH candidates.
Optionally, the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate may not be independently detected in the blind detection process, or the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is allowed to be independently detected in the blind detection process.
Optionally, the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates of the same size, or the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates of different sizes.
Optionally, the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same slot cycle and/or offset.
Optionally, search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same starting symbol in the time slot.
Optionally, search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have different starting positions, but a time interval of the starting positions is less than X symbols, and X ≧ 1.
Optionally, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by CCE indexes of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
Optionally, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is composed of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination indicated by the network side, or the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination automatically corresponds to PDCCH candidates corresponding to any plurality of member aggregation levels or member PDCCH candidates.
Optionally, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate.
Optionally, the determining of the aggregation level combination or the PDCCH candidate combination is configured to determine the aggregation level combination or the PDCCH candidate combination according to an indication of the base station.
Optionally, the length of the mother code of the Polar code of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is 512.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a detection apparatus for a physical downlink control channel, including: a configuration unit, a combination unit and a detection unit; wherein:
a configuration unit adapted to determine a configuration of an aggregation level combination or a PDCCH candidate combination;
a combining unit, adapted to determine an aggregation level combination or a PDCCH candidate combination according to a configuration of the aggregation level combination or the PDCCH candidate combination, wherein an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate;
the detection unit is suitable for blindly detecting PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination;
the configuration of the aggregation level combination is determined by the search space configuration corresponding to the member aggregation level contained in the combination, and the configuration of the PDCCH candidate combination is determined by the search space configuration corresponding to the member PDCCH candidate contained in the combination.
Optionally, the aggregation level combination or the PDCCH candidate combination consists of 2-3 member aggregation levels or member PDCCH candidates.
Optionally, the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate may not be independently detected in the blind detection process, or the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is allowed to be independently detected in the blind detection process.
Optionally, the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates of the same size, or the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates of different sizes.
Optionally, the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same slot cycle and/or offset.
Optionally, search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same starting symbol in the time slot.
Optionally, search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have different starting positions, but a time interval of the starting positions is less than X symbols, and X ≧ 1.
Optionally, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by CCE indexes of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
Optionally, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is composed of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination indicated by the network side, or the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination automatically corresponds to PDCCH candidates corresponding to any plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
Optionally, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate.
Optionally, the determining of the aggregation level combination or the PDCCH candidate combination is configured to determine the aggregation level combination or the PDCCH candidate combination according to an indication of the base station.
Optionally, the length of the mother code of the Polar code of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is 512.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a user equipment, including the apparatus for detecting a physical downlink control channel as described above.
Optionally, the user equipment is a mobile phone terminal.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the indication of a base station, determining the configuration of an aggregation level combination or a PDCCH candidate combination, determining the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, wherein the aggregation level or the PDCCH candidate in the prior art is used as a member aggregation level or a member PDCCH candidate in the aggregation level combination or the PDCCH candidate combination, and the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is subjected to blind detection according to the configuration of the aggregation level combination or the PDCCH candidate combination, so that the robustness of the PDCCH is improved, meanwhile, too large continuous resources corresponding to a PDCCH with a high aggregation level cannot occur, the conflict between the improvement of the robustness of the PDCCH and the avoidance of the blocking of PDCCH resources allocated by a network is eliminated, and the two aspects can be well considered.
Further, the aggregation level combination or PDCCH candidate combination may be composed of several member aggregation levels or member PDCCH candidates of the same or different sizes, and may be chosen between system complexity and system flexibility as required.
Further, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by the CCE indexes of the PDCCH candidates corresponding to the plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination, and in this case, the resource of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination actually reuses the resource of the PDCCH candidate corresponding to the member aggregation level or member PDCCH candidate included in the aggregation level combination or PDCCH candidate combination, which is beneficial to simplifying the complexity of PDCCH resource allocation of the base station and also simplifying the complexity of blind detection of the user equipment.
Further, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate, which may simplify scheduling of the base station.
Drawings
Fig. 1 is a flowchart of a method for detecting a physical downlink control channel according to an embodiment of the present invention;
fig. 2 is a block diagram of a detection apparatus for a physical downlink control channel in an embodiment of the present invention.
Detailed Description
According to the analysis of the background art, a higher aggregation level is beneficial to improving the robustness of the PDCCH, but can also cause the blocking of the PDCCH resources allocated by the network.
The technical scheme provided by the invention considers the two aspects at the same time, namely, the robustness of the PDCCH is improved, and meanwhile, the blocking of PDCCH resources allocated by a network can be avoided.
Specifically, the inventor proposes after research to define a concept of "aggregation level combination" or "PDCCH candidate combination", and combines a plurality of aggregation levels or PDCCH candidates into one aggregation level combination or PDCCH candidate combination according to the configuration of the aggregation level combination or PDCCH candidate combination, where the aggregation levels or PDCCH candidates in the prior art are used as "member aggregation levels" or "member PDCCH candidates" in the aggregation level combination or PDCCH candidate combination, and the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination are blind-checked, so that on one hand, the robustness of the PDCCH is improved, on the other hand, too large continuous resources corresponding to a PDCCH with a high aggregation level do not occur, a conflict between the improvement of the robustness of the PDCCH and the avoidance of blocking of network-allocated PDCCH resources is eliminated, and both the two aspects can be well considered.
In order that those skilled in the art will better understand and realize the present invention, the following detailed description is given by way of specific embodiments with reference to the accompanying drawings.
Example one
As described below, an embodiment of the present invention provides a method for detecting a physical downlink control channel.
Referring to a flow chart of a method for detecting a physical downlink control channel shown in fig. 1, the following detailed description is made through specific steps:
s101, determining the configuration of the aggregation level combination or the PDCCH candidate combination.
The configuration of the aggregation level combination or PDCCH candidate combination may be determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates it contains.
Search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same time slot period and/or offset;
search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same starting symbol in a time slot;
the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have different starting positions, but the time interval of the starting positions is less than X symbols.
The CCE index of a PDCCH candidate corresponding to an aggregation level combination or a PDCCH candidate combination is determined by the CCE indexes of a plurality of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination. In this case, the resources of the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination actually reuse the resources of the PDCCH candidates corresponding to the member aggregation levels or the member PDCCH candidates included in a plurality of aggregation level combinations or PDCCH candidate combinations, which is beneficial to simplifying the complexity of PDCCH resource allocation of the base station and also simplifying the complexity of blind detection of the user equipment.
Specifically, the CCE index of the PDCCH candidate corresponding to each member aggregation level or member PDCCH candidate is determined by the CCE starting position and the size of the member aggregation level or member PDCCH candidate. For a PDCCH candidate corresponding to a certain aggregation level combination or PDCCH candidate combination, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is composed of CCE indexes of a plurality of member aggregation levels included in the aggregation level combination or PDCCH candidate combination or a plurality of PDCCH candidates corresponding to the member PDCCH candidate (that is, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is specifically composed of CCE indexes of which member aggregation levels or PDCCH candidates correspond).
In one embodiment, the network side indicates that the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination are composed of PDCCH candidates corresponding to 2 or 3 member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
In another embodiment, a PDCCH candidate corresponding to an aggregation level combination or PDCCH candidate combination automatically corresponds to an index of a PDCCH candidate corresponding to any 2 or 3 member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination. For example, there are P PDCCH candidates for the member aggregation level or member PDCCH candidate a, and Q PDCCH candidates for the member aggregation level or member PDCCH candidate B, and there are P × Q combinations of PDCCH candidates or aggregation level combinations including the member aggregation level or member PDCCH candidate a and the member aggregation level or member PDCCH candidate B.
Since CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates can be calculated by a formula (the formula belongs to the prior art) and have randomness, a case where CCE indexes overlap may occur.
In this embodiment, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates completely overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be taken as one PDCCH candidate, which may simplify scheduling of the base station.
In a specific implementation, the base station may allocate a configuration of an aggregation level combination or a PDCCH candidate combination to each user equipment, and the user equipment receives the configuration of the aggregation level combination or the PDCCH candidate combination transmitted by the base station, so as to determine the configuration of the aggregation level combination or the PDCCH candidate combination.
After determining the configuration of the aggregation level combination or the PDCCH candidate combination, the ue may determine the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, and perform blind detection according to the configuration of the aggregation level combination or the PDCCH candidate combination.
S102, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the aggregation level combination or the PDCCH candidate combination is determined.
As previously mentioned, the inventors have defined the concept of "aggregation level combining" or "PDCCH candidate combining". In particular, the method comprises the following steps of,
combining several aggregation levels (i.e. aggregation levels in the prior art) or PDCCH candidates (i.e. PDCCH candidates in the prior art) into one aggregation level combination or PDCCH candidate combination, thereby determining an aggregation level combination or PDCCH candidate combination, wherein the aggregation levels (i.e. aggregation levels in the prior art) or PDCCH candidates (i.e. PDCCH candidates in the prior art) in the aggregation level combination or PDCCH candidate combination are used as member aggregation levels or member PDCCH candidates.
The PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination use the resources of the PDCCH candidates corresponding to several aggregation levels.
The aggregation level combination or the PDCCH candidate combination can be combined by a plurality of member aggregation levels or member PDCCH candidates with the same size, so that the complexity of the system can be reduced. For example,
in a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 2 or 3 size 4 member aggregation level combinations or PDCCH candidates;
in a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 2 size 8 member aggregation level combinations or PDCCH candidates.
In a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 3 size 8 member aggregation level combinations or PDCCH candidates. In this case, the size of the aggregation level combination or PDCCH candidate combination is 24 to more than 16, and a scenario requiring extremely high reliability or a scenario requiring extremely large coverage can be satisfied.
The aggregation level combination or the PDCCH candidate combination may also be combined by several member aggregation levels or member PDCCH candidates with different sizes, which may improve the system flexibility although increasing the system complexity. For example,
in a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 1 size 4 member aggregation level or member PDCCH candidate and 1 size 8 member aggregation level combination or PDCCH candidate;
in a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 2 size 4 member aggregation levels or member PDCCH candidates and 1 size 8 member aggregation level combination or PDCCH candidate combination;
in a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 1 size 4 member aggregation level or member PDCCH candidate and 2 size 8 member aggregation level combinations or PDCCH candidates. In this case, the size of the aggregation level combination or PDCCH candidate combination is 20 to more than 16, and a scenario requiring extremely high reliability or a scenario requiring extremely large coverage can be satisfied.
In a typical example, one aggregation level combination or PDCCH candidate combination may be composed of 1 size 8 member aggregation level or member PDCCH candidate and 1 size 16 member aggregation level combination or PDCCH candidate. In this case, the size of the aggregation level combination or PDCCH candidate combination is 24 to more than 16, and a scenario requiring extremely high reliability or a scenario requiring extremely large coverage can be satisfied.
As can be seen from the above description of the technical solutions, in this embodiment, an aggregation level combination or a PDCCH candidate combination may be composed of a plurality of member aggregation levels or member PDCCH candidates with the same or different sizes, and may be chosen between system complexity and system flexibility according to needs.
The "size" of an aggregation level referred to in this application refers to the "number of CCEs" in the aggregation level.
In this embodiment, the length of the mother code of the Polar code of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is 512.
S103, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are detected in a blind mode.
In one embodiment, the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates are set to be unable to be independently detected, that is, the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates are not independently detected in the blind detection process.
In another embodiment, the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates may be allowed to be detected independently in the blind detection process.
The above description of the technical solution shows that: in this embodiment, according to an instruction of a base station, a configuration of an aggregation level combination or a PDCCH candidate combination is determined, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the aggregation level combination or the PDCCH candidate combination is determined, in the prior art, the aggregation level or the PDCCH candidate is used as a "member aggregation level" or a "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination, and according to the configuration of the aggregation level combination or the PDCCH candidate combination, a PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blind-checked, so that on one hand, the robustness of a PDCCH is improved, on the other hand, too large continuous resources corresponding to a PDCCH with a high aggregation level do not occur, a conflict between the improvement of the robustness of the PDCCH and the avoidance of blocking of PDCCH resources allocated by a network is eliminated, and both of the above aspects can be well considered.
Example two
As described below, an embodiment of the present invention provides a detection apparatus for a physical downlink control channel.
Referring to fig. 2, a block diagram of a detection apparatus for a physical downlink control channel is shown.
The detection device of the physical downlink control channel comprises: a configuration unit 201, a combination unit 202 and a detection unit 203; the main functions of each unit are as follows:
a configuration unit 201 adapted to determine a configuration of an aggregation level combination or a PDCCH candidate combination;
a combining unit 202, adapted to determine an aggregation level combination or a PDCCH candidate combination according to a configuration of the aggregation level combination or the PDCCH candidate combination, where an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate;
the detecting unit 203 is adapted to blindly detect PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination.
The above description of the technical solution shows that: in this embodiment, according to an instruction of a base station, a configuration of an aggregation level combination or a PDCCH candidate combination is determined, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the aggregation level combination or the PDCCH candidate combination is determined, in the prior art, the aggregation level or the PDCCH candidate is used as a "member aggregation level" or a "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination, and according to the configuration of the aggregation level combination or the PDCCH candidate combination, a PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blind-checked, so that on one hand, the robustness of a PDCCH is improved, on the other hand, too large continuous resources corresponding to a PDCCH with a high aggregation level do not occur, a conflict between the improvement of the robustness of the PDCCH and the avoidance of blocking of PDCCH resources allocated by a network is eliminated, and both of the above aspects can be well considered.
In a specific implementation, the aggregation level combination or the PDCCH candidate combination can be composed of 2-3 member aggregation levels or member PDCCH candidates.
In a specific implementation, the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates are not independently detected in the blind detection process, or the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates are allowed to be independently detected in the blind detection process.
In a specific implementation, an aggregation level combination or PDCCH candidate combination may consist of several same-sized member aggregation levels or member PDCCH candidates, or an aggregation level combination or PDCCH candidate combination may consist of several different-sized member aggregation levels or member PDCCH candidates.
The above description of the technical solution shows that: in this embodiment, the aggregation level combination or the PDCCH candidate combination may be composed of a plurality of member aggregation levels or member PDCCH candidates with the same or different sizes, and may be chosen between the system complexity and the system flexibility as needed.
In particular implementations, the configuration of an aggregation level combination or PDCCH candidate combination may be determined by the search space configuration corresponding to the member aggregation level or member PDCCH candidate it contains.
In particular implementations, the search spaces corresponding to several member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination may have the same slot cycle and/or offset.
In a specific implementation, the search spaces corresponding to several member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination may have the same intra-slot starting symbol.
In a specific implementation, the search spaces corresponding to several member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination may have different starting positions, but the time interval of the starting positions is less than X symbols.
In a specific implementation, the CCE index of a PDCCH candidate corresponding to an aggregation level combination or a PDCCH candidate combination may be determined by CCE indexes of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
The above description of the technical solution shows that: in this embodiment, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by CCE indexes of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination, and in this case, the resource of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination actually reuses the resource of the PDCCH candidate corresponding to the member aggregation level or member PDCCH candidate included in the aggregation level combination or PDCCH candidate combination, which is beneficial to simplifying the complexity of PDCCH resource allocation of the base station and also simplifying the complexity of blind detection of the user equipment.
In a specific implementation, the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are composed of a plurality of PDCCH candidates indicated by the network side and corresponding to the member aggregation levels or the member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination, or the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination automatically correspond to PDCCH candidates corresponding to any plurality of member aggregation levels or member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination.
In a specific implementation, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate.
The above description of the technical solution shows that: in this embodiment, when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the overlapping CCE index is only counted as one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations to which the two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate, which may simplify scheduling of the base station.
In a specific implementation, the determining the configuration of the aggregation level combination or the PDCCH candidate combination may be determining the aggregation level combination or the PDCCH candidate combination according to an indication of a base station.
In a specific implementation, the length of the mother code of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination may be 512.
EXAMPLE III
As described below, an embodiment of the present invention provides a user equipment.
The difference from the prior art is that the user equipment includes the apparatus for detecting the physical downlink control channel as provided in the embodiment of the present invention. Therefore, the user equipment can determine the configuration of the aggregation level combination or the PDCCH candidate combination according to the indication of the base station, determine the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, and blindly detect the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination as the member aggregation level or the member PDCCH candidate in the aggregation level combination or the PDCCH candidate combination in the prior art, thereby improving the robustness of the PDCCH, avoiding the conflict between the improvement of the robustness of the PDCCH and the prevention of the blocking of PDCCH resources allocated by a network, and well considering the two aspects.
In a specific implementation, the user equipment may be a mobile phone user terminal.
Those skilled in the art will understand that, in the methods of the embodiments, all or part of the steps can be performed by hardware associated with program instructions, and the program can be stored in a computer-readable storage medium, which can include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (20)

1. A method for detecting a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:
determining a configuration of an aggregation level combination or a PDCCH candidate combination;
determining an aggregation level combination or a PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination, wherein the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate;
blind-detecting PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination;
the configuration of the aggregation level combination is determined by the search space configuration corresponding to the member aggregation level contained in the aggregation level combination, and the configuration of the PDCCH candidate combination is determined by the search space configuration corresponding to the member PDCCH candidates contained in the PDCCH candidate combination;
search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same time slot period and/or offset;
or the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same starting symbol in the time slot;
or the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have different starting positions, but the time interval of the starting positions is less than X symbols, and X is more than or equal to 1.
2. The method for detecting the physical downlink control channel according to claim 1, wherein the aggregation level combination or the PDCCH candidate combination consists of 2-3 member aggregation levels or member PDCCH candidates.
3. The method for detecting a physical downlink control channel according to claim 1, wherein the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is not independently detected in the blind detection process, or the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is allowed to be independently detected in the blind detection process.
4. The method for detecting physical downlink control channel according to claim 1, wherein the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates with the same size, or the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates with different sizes.
5. The method for detecting the physical downlink control channel according to claim 1, wherein the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by CCE indexes of a plurality of member aggregation levels included in the aggregation level combination or the PDCCH candidate combination or PDCCH candidates corresponding to the member PDCCH candidates.
6. The method for detecting a physical downlink control channel according to claim 5, wherein the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are composed of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination indicated by the network side, or the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination automatically correspond to indexes of PDCCH candidates corresponding to any plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
7. The method of claim 5, wherein when there is an overlap between CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is counted as only one CCE index, or when the CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate to which the two member aggregation levels or member PDCCH candidates belong will not be a PDCCH candidate.
8. The method for detecting physical downlink control channel according to claim 1, wherein the determining the aggregation level combination or the PDCCH candidate combination is configured to determine the aggregation level combination or the PDCCH candidate combination according to an indication of a base station.
9. The method for detecting the physical downlink control channel according to claim 1, wherein a length of a mother code of a Polar code of a PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.
10. A device for detecting a physical downlink control channel, comprising: a configuration unit, a combination unit and a detection unit; wherein:
a configuration unit adapted to determine a configuration of an aggregation level combination or a PDCCH candidate combination;
a combining unit, adapted to determine an aggregation level combination or a PDCCH candidate combination according to a configuration of the aggregation level combination or the PDCCH candidate combination, wherein an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate;
the detection unit is suitable for blindly detecting PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination;
the configuration of the aggregation level combination is determined by the search space configuration corresponding to the member aggregation level contained in the aggregation level combination, and the configuration of the PDCCH candidate combination is determined by the search space configuration corresponding to the member PDCCH candidates contained in the PDCCH candidate combination;
search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same time slot period and/or offset;
or the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same starting symbol in the time slot;
or the search spaces corresponding to a plurality of member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have different starting positions, but the time interval of the starting positions is less than X symbols, and X is more than or equal to 1.
11. The apparatus for detecting physical downlink control channel according to claim 10, wherein the aggregation level combination or the PDCCH candidate combination consists of 2-3 member aggregation levels or member PDCCH candidates.
12. The apparatus for detecting a physical downlink control channel according to claim 10, wherein the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is not independently detected in the blind detection process, or the PDCCH candidate corresponding to the member aggregation level or the member PDCCH candidate is allowed to be independently detected in the blind detection process.
13. The apparatus for detecting physical downlink control channel according to claim 10, wherein the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates with the same size, or the aggregation level combination or the PDCCH candidate combination consists of a plurality of member aggregation levels or member PDCCH candidates with different sizes.
14. The apparatus for detecting a physical downlink control channel according to claim 10, wherein CCE indexes of PDCCH candidates corresponding to aggregation level combinations or PDCCH candidate combinations are determined by CCE indexes of a plurality of member aggregation levels included in the aggregation level combinations or PDCCH candidate combinations or PDCCH candidates corresponding to the member PDCCH candidates.
15. The apparatus for detecting a physical downlink control channel according to claim 14, wherein the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are composed of PDCCH candidates corresponding to a plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination indicated by the network side, or the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination automatically correspond to PDCCH candidates corresponding to any plurality of member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.
16. The apparatus for detecting a physical downlink control channel according to claim 14, wherein when there is an overlap between CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is counted as only one CCE index, or when CCE indexes of PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates overlap, PDCCH candidates corresponding to an aggregation level combination or PDCCH candidate to which the two member aggregation levels or member PDCCH candidates belong are not counted as one PDCCH candidate.
17. The apparatus for detecting a physical downlink control channel according to claim 10, wherein the determining the aggregation level combination or the PDCCH candidate combination is configured to determine the aggregation level combination or the PDCCH candidate combination according to an indication of a base station.
18. The apparatus for detecting physical downlink control channel according to claim 10, wherein a length of a mother code of a Polar code of a PDCCH candidate corresponding to an aggregation level combination or a PDCCH candidate combination is 512.
19. A user equipment, characterized by comprising the detection apparatus of physical downlink control channel according to any one of claims 10 to 18.
20. The user device of claim 19, wherein the user device is a mobile terminal for a cell phone.
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