User equipment and detection method and device for physical downlink control channel thereof

Abstract

A detection method and device for a user equipment and its physical downlink control channel, the method comprising: 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, and using the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as a member aggregation level or a member PDCCH candidate; blindly detecting the PDCCH candidate 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. On the one hand, the present invention improves the robustness of the PDCCH, while at the same time preventing a PDCCH with a high aggregation level from corresponding to too large continuous resources, thereby eliminating the conflict between improving the robustness of the PDCCH and avoiding the blocking of the network in allocating PDCCH resources, and being able to take both aspects into consideration.

Description

[0001] This application is a divisional application of the patent with application date of April 4, 2018, application number 201810306209.9, and invention name “Detection method and device for user equipment and its physical downlink control channel”. Technical Field

[0002] The present invention relates to the technical field of wireless communications, and in particular to a method and device for detecting user equipment and a physical downlink control channel thereof. Background Art

[0003] The PDCCH (Physical Downlink Control Channel) is carried on the Control Resource Set (CORESET). The PDCCH consists of one or more CCEs (Control Channel Elements). A CCE consists of multiple REGs (Resource Element Groups) (the default is 6). A REG is equivalent to a physical resource block (PRB) on an OFDM symbol.

[0004] During wireless communication, a user equipment needs to detect the PDCCH in the search space. Since the user equipment cannot predict in advance where the information it wants to receive is located, the PDCCH detection process is usually blind detection, that is, blind detection of possible PDCCH candidates.

[0005] A search space may include one or more aggregation levels. For example, the aggregation level may be 1, 2, 4, 8, etc. An aggregation level may include zero or one or more PDCCH candidates. The starting CCE position of each PDCCH candidate may be calculated by a formula.

[0006] In Ultra Reliable Low Latency Communication (URLLC) scenarios, it's often necessary to improve the robustness of the PDCCH. A higher aggregation level improves PDCCH robustness, but it also leads to network congestion in allocating PDCCH resources. This is because PDCCH resources (CCE resources) are contiguous, and a large contiguous resource corresponding to a PDCCH at a high aggregation level can result in a lack of contiguous resources for other PDCCHs.

[0007] In the prior art, only a compromise can be made between improving the robustness of the PDCCH and avoiding the congestion of the network in allocating PDCCH resources, and it is impossible to achieve better performance in both aspects at the same time. Summary of the Invention

[0008] The technical problem solved by the present invention is: how to improve the robustness of PDCCH while avoiding the blocking of PDCCH resources allocated by the network.

[0009] In order to solve the above technical problems, an embodiment of the present invention provides a method for detecting a physical downlink control channel, including:

[0010] Determining the configuration of aggregation level combinations or PDCCH candidate combinations;

[0011] Determine, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the aggregation level combination or the PDCCH candidate combination, and the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as the member aggregation level or the member PDCCH candidate;

[0012] According to the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blindly detected.

[0013] Optionally, the aggregation level combination or the PDCCH candidate combination consists of 2 to 3 member aggregation levels or member PDCCH candidates.

[0014] Optionally, the blind detection process does not independently detect the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates, or the blind detection process allows independent detection of the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates.

[0015] Optionally, the aggregation level combination or PDCCH candidate combination consists of several member aggregation levels or member PDCCH candidates of the same size, or the aggregation level combination or PDCCH candidate combination consists of several member aggregation levels or member PDCCH candidates of different sizes.

[0016] Optionally, the configuration of the aggregation level combination or the PDCCH candidate combination is determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates contained therein.

[0017] Optionally, the search spaces corresponding to several 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.

[0018] Optionally, the search spaces corresponding to several 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.

[0019] Optionally, the search spaces corresponding to several 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 between the starting positions is less than X symbols.

[0020] Optionally, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by the CCE indices of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates included in the aggregation level combination or the PDCCH candidate combination.

[0021] Optionally, the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is composed of PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates contained 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 the PDCCH candidates corresponding to any several member aggregation levels or member PDCCH candidates.

[0022] Optionally, when there is an overlap in the CCE indices of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is only counted as one CCE index, or when the CCE indices of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate.

[0023] Optionally, the configuration of determining the aggregation level combination or the PDCCH candidate combination is to determine the aggregation level combination or the PDCCH candidate combination according to an instruction of the base station.

[0024] Optionally, the mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.

[0025] In order to solve the above technical problems, an embodiment of the present invention further provides a detection device for a physical downlink control channel, comprising: a configuration unit, a combination unit, and a detection unit; wherein:

[0026] a configuration unit adapted to determine a configuration of an aggregation level combination or a PDCCH candidate combination;

[0027] a combining unit adapted to determine, according to a configuration of the aggregation level combination or the PDCCH candidate combination, an aggregation level combination or a PDCCH candidate combination, and an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as a member aggregation level or a member PDCCH candidate;

[0028] The detection unit is adapted to blindly detect the PDCCH candidate 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.

[0029] Optionally, the aggregation level combination or the PDCCH candidate combination consists of 2 to 3 member aggregation levels or member PDCCH candidates.

[0030] Optionally, the blind detection process does not independently detect the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates, or the blind detection process allows independent detection of the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates.

[0031] Optionally, the aggregation level combination or PDCCH candidate combination consists of several member aggregation levels or member PDCCH candidates of the same size, or the aggregation level combination or PDCCH candidate combination consists of several member aggregation levels or member PDCCH candidates of different sizes.

[0032] Optionally, the configuration of the aggregation level combination or the PDCCH candidate combination is determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates contained therein.

[0033] Optionally, the search spaces corresponding to several 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.

[0034] Optionally, the search spaces corresponding to several 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.

[0035] Optionally, the search spaces corresponding to several 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 between the starting positions is less than X symbols.

[0036] Optionally, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is determined by the CCE indices of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates included in the aggregation level combination or the PDCCH candidate combination.

[0037] Optionally, the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is composed of PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates contained 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 the PDCCH candidate corresponding to any several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination.

[0038] Optionally, when there is an overlap in the CCE indices of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is only counted as one CCE index, or when the CCE indices of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate.

[0039] Optionally, the configuration of determining the aggregation level combination or the PDCCH candidate combination is to determine the aggregation level combination or the PDCCH candidate combination according to an instruction of the base station.

[0040] Optionally, the mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.

[0041] In order to solve the above technical problem, an embodiment of the present invention further provides a user equipment, including the above-mentioned detection device for a physical downlink control channel.

[0042] Optionally, the user device is a mobile phone terminal.

[0043] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0044] According to the instruction of the base station, the configuration of the aggregation level combination or the PDCCH candidate combination is determined, and 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. The aggregation level or PDCCH candidate in the prior art serves as the "member aggregation level" or "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination. According to the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blindly detected, thereby improving the robustness of the PDCCH on the one hand, while preventing a PDCCH with a high aggregation level from corresponding to too large continuous resources, eliminating the conflict between improving the robustness of the PDCCH and avoiding the blocking of the network allocation of PDCCH resources, and being able to take into account both aspects mentioned above.

[0045] Furthermore, an aggregation level combination or a PDCCH candidate combination may be composed of several member aggregation levels or member PDCCH candidates of the same or different sizes, and a trade-off between system complexity and system flexibility may be made as needed.

[0046] Furthermore, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is determined by the CCE indexes of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination. In this case, the resources of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination actually reuse the resources of the PDCCH candidate corresponding to the member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination, which is conducive to simplifying the complexity of PDCCH resource allocation of the base station, and also simplifies the blind detection complexity of the user equipment.

[0047] Furthermore, when the CCE indices of the 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 the CCE indices of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate, which can simplify the scheduling of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Flowchart of a method for detecting a physical downlink control channel according to an embodiment of the present invention;

[0049] Figure 2This is a structural block diagram of a detection device for a physical downlink control channel in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] According to the analysis in the background technology section, a higher aggregation level is beneficial to improving the robustness of PDCCH, but it will also lead to the congestion of network allocation of PDCCH resources. In the existing technology, only a compromise can be made between improving the robustness of PDCCH and avoiding the congestion of network allocation of PDCCH resources, and it is impossible to achieve better performance in the above two aspects at the same time.

[0051] The technical solution provided by the present invention is to take both of the above aspects into consideration, that is, to improve the robustness of the PDCCH while avoiding the congestion of the network in allocating PDCCH resources.

[0052] Specifically, after research, the inventor proposed to define the concept of "aggregation level combination" or "PDCCH candidate combination", and according to the configuration of the aggregation level combination or PDCCH candidate combination, combine several aggregation levels or PDCCH candidates into an aggregation level combination or PDCCH candidate combination, and the aggregation level or PDCCH candidate in the prior art serves as the "member aggregation level" or "member PDCCH candidate" in the aggregation level combination or PDCCH candidate combination, and blindly detects the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination, thereby improving the robustness of the PDCCH on the one hand, while preventing a high aggregation level PDCCH from corresponding to too large continuous resources, eliminating the conflict between improving the robustness of the PDCCH and avoiding the blocking of the network allocation of PDCCH resources, and being able to take into account both aspects mentioned above.

[0053] In order to enable those skilled in the art to better understand and implement the present invention, the present invention is described in detail below through specific embodiments with reference to the accompanying drawings.

[0054] Example 1

[0055] As described below, an embodiment of the present invention provides a method for detecting a physical downlink control channel.

[0056] Reference Figure 1 The following is a flow chart of the detection method of the physical downlink control channel, which is described in detail through specific steps:

[0057] S101: Determine the configuration of an aggregation level combination or a PDCCH candidate combination.

[0058] The configuration of an aggregation level combination or a PDCCH candidate combination may be determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates included therein.

[0059] The search spaces corresponding to several 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;

[0060] The search spaces corresponding to several 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;

[0061] The search spaces corresponding to several 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 between the starting positions is less than X symbols.

[0062] The CCE index of the PDCCH candidate corresponding to an aggregation level combination or a PDCCH candidate combination is determined by the CCE indices of the PDCCH candidates corresponding to the several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination. In this case, the resources of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination actually reuse the resources of the PDCCH candidates corresponding to the several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination, which helps to simplify the complexity of PDCCH resource allocation of the base station and also simplifies the blind detection complexity of the user equipment.

[0063] 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. A member aggregation level or member PDCCH candidate can have several PDCCH candidates. For the 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 the CCE indices of the several PDCCH candidates corresponding to the several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination (that is, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is specifically composed of the CCE indices of the PDCCH candidates corresponding to which member aggregation levels or member PDCCH candidates).

[0064] In one embodiment, as indicated by the network side, the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is composed of PDCCH candidates corresponding to two or three member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.

[0065] In another embodiment, the PDCCH candidate corresponding to an aggregation level combination or PDCCH candidate combination automatically corresponds to the index of the PDCCH candidate corresponding to any two or three member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination. For example, if member aggregation level or member PDCCH candidate A has P PDCCH candidates, and member aggregation level or member PDCCH candidate B has Q PDCCH candidates, then the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination including the above member aggregation level or member PDCCH candidate A and member aggregation level or member PDCCH candidate B automatically have P*Q combinations.

[0066] Since the CCE indexes of the 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 are random, overlapping CCE indexes may occur.

[0067] In this embodiment, when the CCE indices of the 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 the CCE indices of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates completely overlap, the PDCCH candidates corresponding to the aggregation level combination or PDCCH candidate combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate, which can simplify the scheduling of the base station.

[0068] In a specific implementation, the base station may allocate the configuration of the aggregation level combination or PDCCH candidate combination to each user equipment, and the user equipment receives the configuration of the aggregation level combination or PDCCH candidate combination sent by the base station, thereby determining the configuration of the aggregation level combination or PDCCH candidate combination.

[0069] After determining the configuration of the aggregation level combination or the PDCCH candidate combination, the user equipment 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.

[0070] S102: Determine an aggregation level combination or a PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination.

[0071] As mentioned above, the inventors have defined the concept of "aggregation level combination" or "PDCCH candidate combination". Specifically,

[0072] Several aggregation levels (i.e., aggregation levels in the prior art) or PDCCH candidates (i.e., PDCCH candidates in the prior art) are combined into an aggregation level combination or a PDCCH candidate combination, thereby determining the aggregation level combination or the PDCCH candidate combination, and the aggregation level (i.e., aggregation level in the prior art) or PDCCH candidate (i.e., PDCCH candidate in the prior art) in the aggregation level combination or the PDCCH candidate combination is used as a member aggregation level or a member PDCCH candidate.

[0073] The PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination uses resources of PDCCH candidates corresponding to several aggregation levels.

[0074] An aggregation level combination or a PDCCH candidate combination can be composed of several aggregation levels or PDCCH candidates of the same size, which can reduce system complexity.

[0075] In a typical example, an aggregation level combination or PDCCH candidate combination may be composed of 2 or 3 member aggregation level combinations or PDCCH candidate combinations of size 4;

[0076] In a typical example, one aggregation level combination or PDCCH candidate combination may be composed of two aggregation level combinations or PDCCH candidate combinations of size 8.

[0077] In a typical example, an aggregation level combination or PDCCH candidate combination can be composed of three member aggregation level combinations or PDCCH candidate combinations of size 8. In this case, the size of the aggregation level combination or PDCCH candidate combination is 24, which is larger than 16 and can meet the requirements of scenarios requiring extremely high reliability or extremely wide coverage.

[0078] The aggregation level combination or PDCCH candidate combination can also be composed of several aggregation levels or PDCCH candidates of different sizes. Although this increases the system complexity, it can improve the system flexibility. For example,

[0079] In a typical example, an aggregation level combination or a PDCCH candidate combination may be composed of one member aggregation level or member PDCCH candidate combination of size 4 and one member aggregation level combination or PDCCH candidate combination of size 8;

[0080] In a typical example, an aggregation level combination or a PDCCH candidate combination may be composed of two member aggregation levels or member PDCCH candidates of size 4 and one member aggregation level combination or PDCCH candidate combination of size 8;

[0081] In a typical example, an aggregation level combination or a PDCCH candidate combination may be composed of one aggregation level or a PDCCH candidate with a size of 4 and two aggregation level combinations or PDCCH candidate combinations with a size of 8. In this case, the size of the aggregation level combination or the PDCCH candidate combination is 20, which is larger than 16 and can meet the requirements of scenarios requiring extremely high reliability or extremely wide coverage.

[0082] In a typical example, an aggregation level combination or a PDCCH candidate combination may be composed of one aggregation level or a PDCCH candidate with a size of 8 and one aggregation level combination or a PDCCH candidate with a size of 16. In this case, the size of the aggregation level combination or the PDCCH candidate combination is 24, which is larger than 16 and can meet the requirements of scenarios requiring extremely high reliability or scenarios requiring extremely wide coverage.

[0083] It can be seen from the above description of the technical solution that in this embodiment, the aggregation level combination or PDCCH candidate combination can be composed of several member aggregation levels or member PDCCH candidates of the same or different sizes, and a trade-off can be made between system complexity and system flexibility as needed.

[0084] The "size" of an aggregation level mentioned in this application refers to the "number of CCEs" in the aggregation level.

[0085] In this embodiment, the mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.

[0086] S103 : According to the configuration of the aggregation level combination or the PDCCH candidate combination, blindly detect the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination.

[0087] In one embodiment, the PDCCH candidates corresponding to the member aggregation levels or member PDCCH candidates are set to be unable to be detected independently, that is, the PDCCH candidates corresponding to the member aggregation levels or member PDCCH candidates are not independently detected during the blind detection process.

[0088] In another embodiment, the blind detection process may allow independent detection of the member aggregation level or the PDCCH candidate corresponding to the member PDCCH candidate.

[0089] From the above description of the technical solution, it can be seen that: in this embodiment, according to the indication of the base station, the configuration of the aggregation level combination or the PDCCH candidate combination is determined, and 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, and the aggregation level or PDCCH candidate in the prior art serves as the "member aggregation level" or "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination. According to the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blindly detected, thereby improving the robustness of the PDCCH on the one hand, while preventing a PDCCH with a high aggregation level from corresponding to too large continuous resources, eliminating the conflict between improving the robustness of the PDCCH and avoiding the blocking of the network allocation of PDCCH resources, and being able to take into account both aspects mentioned above.

[0090] Example 2

[0091] As described below, an embodiment of the present invention provides a detection device for a physical downlink control channel.

[0092] Reference Figure 2 The structural block diagram of the detection device of the physical downlink control channel is shown.

[0093] The physical downlink control channel detection device includes: a configuration unit 201, a combination unit 202 and a detection unit 203; wherein the main functions of each unit are as follows:

[0094] A configuration unit 201 adapted to determine a configuration of an aggregation level combination or a PDCCH candidate combination;

[0095] a combining unit 202 adapted to determine, according to a configuration of the aggregation level combination or the PDCCH candidate combination, an aggregation level combination or a PDCCH candidate combination, and an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as a member aggregation level or a member PDCCH candidate;

[0096] The detection unit 203 is adapted to 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.

[0097] From the above description of the technical solution, it can be seen that: in this embodiment, according to the indication of the base station, the configuration of the aggregation level combination or the PDCCH candidate combination is determined, and 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, and the aggregation level or PDCCH candidate in the prior art serves as the "member aggregation level" or "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination. According to the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blindly detected, thereby improving the robustness of the PDCCH on the one hand, while preventing a PDCCH with a high aggregation level from corresponding to too large continuous resources, eliminating the conflict between improving the robustness of the PDCCH and avoiding the blocking of the network allocation of PDCCH resources, and being able to take into account both aspects mentioned above.

[0098] In a specific implementation, an aggregation level combination or a PDCCH candidate combination may be composed of 2 to 3 member aggregation levels or member PDCCH candidates.

[0099] In a specific implementation, the blind detection process does not independently detect the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates, or the blind detection process allows the independent detection of the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates.

[0100] In a specific implementation, an aggregation level combination or a PDCCH candidate combination may be composed of several member aggregation levels or member PDCCH candidates of the same size, or an aggregation level combination or a PDCCH candidate combination may be composed of several member aggregation levels or member PDCCH candidates of different sizes.

[0101] It can be seen from the above description of the technical solution that in this embodiment, the aggregation level combination or PDCCH candidate combination can be composed of several member aggregation levels or member PDCCH candidates of the same or different sizes, and a trade-off can be made between system complexity and system flexibility as needed.

[0102] In a specific implementation, the configuration of an aggregation level combination or a PDCCH candidate combination may be determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates contained therein.

[0103] 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 time slot period and / or offset.

[0104] 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 starting symbol in the time slot.

[0105] 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 between the starting positions is less than X symbols.

[0106] In a specific implementation, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination may be determined by the CCE indices of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates included in the aggregation level combination or PDCCH candidate combination.

[0107] It can be seen from the above description of the technical solution that: in this embodiment, the CCE index of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is determined by the CCE index of the PDCCH candidate corresponding to several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination. In this case, the resources of the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination are actually reused. The resources of the PDCCH candidate corresponding to the member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination are conducive to simplifying the complexity of PDCCH resource allocation of the base station, and also simplifying the blind detection complexity of the user equipment.

[0108] In a specific implementation, the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination is composed of several PDCCH candidates indicated by the network side corresponding to the member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination, or the PDCCH candidate corresponding to the aggregation level combination or PDCCH candidate combination automatically corresponds to the PDCCH candidate corresponding to any several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or PDCCH candidate combination.

[0109] In a specific implementation, when there is an overlap in the CCE indices of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is only counted as one CCE index, or when the CCE indices of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate.

[0110] It can be seen from the above description of the technical solution that in this embodiment, when the CCE indexes of the 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 the CCE indexes of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be regarded as one PDCCH candidate, which can simplify the scheduling of the base station.

[0111] In a specific implementation, the configuration of determining the aggregation level combination or the PDCCH candidate combination may be to determine the aggregation level combination or the PDCCH candidate combination according to an instruction of the base station.

[0112] In a specific implementation, the mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination may be 512.

[0113] Example 3

[0114] As described below, an embodiment of the present invention provides a user equipment.

[0115] The difference from the prior art is that the user equipment includes an apparatus for detecting a physical downlink control channel as provided in the embodiments of the present invention. Therefore, the user equipment can determine the configuration of an aggregation level combination or a PDCCH candidate combination according to an instruction from a base station, and determine the aggregation level combination or the PDCCH candidate combination according to the configuration of the aggregation level combination or the PDCCH candidate combination. The aggregation level or PDCCH candidate in the prior art serves as a "member aggregation level" or "member PDCCH candidate" in the aggregation level combination or the PDCCH candidate combination. Based on the configuration of the aggregation level combination or the PDCCH candidate combination, the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is blindly detected. This improves the robustness of the PDCCH while preventing a high aggregation level PDCCH from corresponding to too many continuous resources. This eliminates the conflict between improving the robustness of the PDCCH and avoiding congestion in the network's allocation of PDCCH resources, effectively balancing the above two aspects.

[0116] In a specific implementation, the user equipment may be a mobile phone user terminal.

[0117] Those skilled in the art will understand that in the various methods of the above embodiments, all or part of the steps can be completed by hardware related to program instructions, and the program can be stored in a computer-readable storage medium, which may include: ROM, RAM, disk or CD, etc.

[0118] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A method for detecting a physical downlink control channel, characterized in that: include: Determining a configuration of an aggregation level combination or a PDCCH candidate combination; Determine, according to the configuration of the aggregation level combination or the PDCCH candidate combination, the aggregation level combination or the PDCCH candidate combination, and the aggregation level or the PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as the member aggregation level or the member PDCCH candidate; According to the configuration of the aggregation level combination or the PDCCH candidate combination, blindly detect the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination; An aggregation level combination or a PDCCH candidate combination is composed of a number of member aggregation levels or member PDCCH candidates of the same size; The configuration of an aggregation level combination or a PDCCH candidate combination is determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates contained therein.

2. The method for detecting a physical downlink control channel according to claim 1, wherein: An aggregation level combination or a PDCCH candidate combination consists of 2 to 3 member aggregation levels or member PDCCH candidates.

3. The method for detecting a physical downlink control channel according to claim 1, wherein: The blind detection process does not independently detect the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates, or the blind detection process allows the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates to be independently detected.

4. The method for detecting a physical downlink control channel according to claim 1, wherein: The search spaces corresponding to several 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.

5. The method for detecting a physical downlink control channel according to claim 1, wherein: The search spaces corresponding to several member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same intra-time slot start symbol.

6. The method for detecting a physical downlink control channel according to claim 1, wherein: The search spaces corresponding to several 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 between the starting positions is less than X symbols, where X≥1.

7. The method for detecting a 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 the CCE indexes of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates included in the aggregation level combination or the PDCCH candidate combination.

8. The method for detecting a physical downlink control channel according to claim 7, wherein: The PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are composed of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination indicated by the network side, or the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination automatically correspond to the index of the PDCCH candidates corresponding to any several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination.

9. The method for detecting a physical downlink control channel according to claim 7, wherein: When there is overlap in the CCE indexes of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is only counted as one CCE index, or when the CCE indexes of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate.

10. The method for detecting a physical downlink control channel according to claim 1, wherein: The configuration of determining the aggregation level combination or the PDCCH candidate combination is to determine the aggregation level combination or the PDCCH candidate combination according to an instruction of the base station.

11. The method for detecting a physical downlink control channel according to claim 1, wherein: The mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.

12. A detection device for a physical downlink control channel, characterized in that: include: Configuration unit, combination unit and 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, according to a configuration of the aggregation level combination or the PDCCH candidate combination, an aggregation level combination or a PDCCH candidate combination, an aggregation level or a PDCCH candidate in the aggregation level combination or the PDCCH candidate combination as a member aggregation level or a member PDCCH candidate; A detection unit, adapted to blindly detect a PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination according to a configuration of the aggregation level combination or the PDCCH candidate combination; An aggregation level combination or a PDCCH candidate combination is composed of a number of member aggregation levels or member PDCCH candidates of the same size; The configuration of an aggregation level combination or a PDCCH candidate combination is determined by the search space configuration corresponding to the member aggregation levels or member PDCCH candidates contained therein.

13. The detection device for a physical downlink control channel according to claim 12, characterized in that: An aggregation level combination or a PDCCH candidate combination consists of 2 to 3 member aggregation levels or member PDCCH candidates.

14. The device for detecting a physical downlink control channel according to claim 12, characterized in that: The blind detection process does not independently detect the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates, or the blind detection process allows the PDCCH candidates corresponding to the member aggregation level or the member PDCCH candidates to be independently detected.

15. The device for detecting a physical downlink control channel according to claim 12, characterized in that: The search spaces corresponding to several 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.

16. The device for detecting a physical downlink control channel according to claim 12, characterized in that: The search spaces corresponding to several member aggregation levels or member PDCCH candidates in the same aggregation level combination or PDCCH candidate combination have the same intra-time slot start symbol.

17. The device for detecting a physical downlink control channel according to claim 12, characterized in that: The search spaces corresponding to several 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 between the starting positions is less than X symbols, where X≥1.

18. The detection device for a physical downlink control channel according to claim 12, characterized in that: 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 several member aggregation levels or member PDCCH candidates included in the aggregation level combination or the PDCCH candidate combination.

19. The device for detecting a physical downlink control channel according to claim 18, characterized in that: The PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination are composed of the PDCCH candidates corresponding to several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination indicated by the network side, or the PDCCH candidates corresponding to the aggregation level combination or the PDCCH candidate combination automatically correspond to the PDCCH candidates corresponding to any several member aggregation levels or member PDCCH candidates contained in the aggregation level combination or the PDCCH candidate combination.

20. The device for detecting a physical downlink control channel according to claim 18, characterized in that: When there is overlap in the CCE indexes of the PDCCH candidates corresponding to any two member aggregation levels or member PDCCH candidates, the overlapping CCE index is only counted as one CCE index, or when the CCE indexes of the 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 combination to which these two member aggregation levels or member PDCCH candidates belong will not be counted as one PDCCH candidate.

21. The device for detecting a physical downlink control channel according to claim 12, characterized in that: The configuration of determining the aggregation level combination or the PDCCH candidate combination is to determine the aggregation level combination or the PDCCH candidate combination according to an instruction of the base station.

22. The detection device for a physical downlink control channel according to claim 12, characterized in that: The mother code length of the Polar code encoding of the PDCCH candidate corresponding to the aggregation level combination or the PDCCH candidate combination is 512.

23. A user equipment, characterized in that: A detection device for a physical downlink control channel comprising any one of claims 12 to 22.

24. The user equipment according to claim 23, characterized in that The user equipment is a mobile phone terminal.

Images