CN113950076A

CN113950076A - Monitoring method and device, configuration method and device, storage medium, terminal and base station of PDCCH based on multiple TRPs

Info

Publication number: CN113950076A
Application number: CN202010691456.2A
Authority: CN
Inventors: 周欢
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2022-01-18

Abstract

A monitoring method and device, a configuration method and device, a storage medium, a terminal and a base station of a PDCCH based on multiple TRPs are provided, the method comprises the following steps: respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs; judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource; determining interval-level PDCCH monitoring selection combination according to the judgment result; and determining a search space for PDCCH monitoring of a preset PDCCH subcarrier interval based on the interval-level PDCCH monitoring selection combination. The invention can fill the blank in the prior art.

Description

Monitoring method and device, configuration method and device, storage medium, terminal and base station of PDCCH based on multiple TRPs

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for monitoring a PDCCH based on multiple TRPs, a method and an apparatus for configuring the PDCCH, a storage medium, a terminal, and a base station.

Background

In the existing technology for monitoring a Physical Downlink Control Channel (PDCCH), PDCCH blind detection limit and non-overlapping CCE limit are defined. When the configured PDCCH blind detection number and non-overlapping CCEs exceed the above-mentioned limit, it is called over-limit (overlimiting), and at this time, the User Equipment (UE) discards the highest index search space set until the PDCCH blind detection limit and the non-overlapping Control Channel Element (CCE) limit are satisfied.

In the Rel-16(Release-16) New Radio (NR) system, the UE uses interval (span) level PDCCH monitoring (UE is expected to monitor corrected PDCCH candidates span), introducing blind detection limit and non-overlapping CCE limit in the span. That is, the gNB and the UE determine whether the above-mentioned constraint is satisfied within a span, and if not, discard all or part of the highest index search space set within the span.

In the 5G NR system, in order to improve a spatial diversity gain, a base station may transmit downlink data to a terminal through antenna panels (panels) of a plurality of Transmission Receiver Points (TRPs), and correspondingly, the terminal may receive data transmitted by the base station through the panels or transmit uplink data to the base station through the panels. At this time, if communication among the plurality of TRPs is an ideal backhaul (non-ideal backhaul), each TRP individually configures a Physical Downlink Control Channel (PDCCH) resource to the terminal, and schedules a Physical Downlink Shared Channel (PDSCH) resource to transmit downlink data to the terminal, or schedules a Physical Uplink Shared Channel (PUSCH) resource to transmit Uplink data to the base station on the PUSCH resource. Different Control-resource sets (CORESET) are configured through high-level signaling and respectively belong to different CORESET pools. Different CORESET pools represent different TRPs.

However, in the prior art, there is no technical solution that supports Rel-16PDCCH monitoring in a single TRP (single TRP) scenario, and supports Rel-16PDCCH monitoring in a multiple TRP (m-TRP) scenario.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a monitoring method and device, a configuration method and device, a storage medium, a terminal and a base station for PDCCH based on multiple TRPs, which can enable UE to determine a search space monitored by PDCCH based on interval level PDCCH monitoring selection combination, and the base station can determine the search space configured by PDCCH based on the same interval level PDCCH monitoring selection combination, thereby improving the accuracy of communication and filling the blank in the prior art.

In order to solve the above technical problem, an embodiment of the present invention provides a method for monitoring a PDCCH based on multiple TRPs, including the following steps: respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs; judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource; determining interval-level PDCCH monitoring selection combination according to the judgment result; determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value of a preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination; and determining a search space for PDCCH monitoring at a preset PDCCH subcarrier interval according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

Optionally, the determining the interval level PDCCH monitoring combinations of the plurality of TRPs respectively includes: for each TRP_iAccording to the search space monitoring time of all CORESETs belonging to CORESET pool index (i-1), determining the minimum interval X between the first symbol monitored by the adjacent PDCCH in the previous interval level and the first symbol monitored by the PDCCH in the next interval level_iAnd the maximum number Y of symbols monitored by the interval-level PDCCH_iIn order to monitor the combination (X) with the interval level PDCCH as CORESET pool index (i-1)_i,Y_i) (ii) a Wherein i is a positive integer.

Optionally, determining, according to the determination result, the interval PDCCH monitoring selection combination includes: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and interval level PDCCH monitoring of each TRP starts from the same symbol of time domain resource, then any interval level PDCCH monitoring combination (X) is adopted_i,Y_i) And monitoring the selected combination as the interval level PDCCH.

Optionally, determining, according to the determination result, the interval PDCCH monitoring selection combination includes: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) Same, and interval level PDCCH monitoring of each TRP starts from differentThe symbol of the time domain resource of (2) adopts any interval level PDCCH monitoring combination (X)_i,Y_i) And monitoring the selected combination as the interval level PDCCH.

Optionally, determining, according to the upper limit of the number of interval-level PDCCH blind detections and the upper limit of the number of interval-level PDCCH non-overlapping CCEs, a search space for PDCCH monitoring at a preset PDCCH subcarrier interval includes: traversing individual TRPs_iRespectively selecting any interval-level PDCCH monitored time domain resource T of the current time slot_i(ii) a In that

In the time domain resource, judging whether the number of interval-level PDCCH blind tests exceeds the upper limit value of the number of interval-level PDCCH blind tests

And whether the number of the non-overlapping CCEs of the interval level PDCCH exceeds the upper limit value of the number of the non-overlapping CCEs of the interval level PDCCH

Determining a search space monitored by the PDCCH with the PDCCH subcarrier spacing mu based on the judgment result; wherein I is a positive integer, 0 < I < I, I being used to indicate the number of the plurality of TRPs.

Optionally, determining, according to the determination result, the interval PDCCH monitoring selection combination includes: if the interval level PDCCH monitoring combinations of the TRPs are different, determining the time domain resource of the search space monitoring time of each CORESET; adding the time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection; and according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the adjacent previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH, and a maximum number Y of the symbols monitored by the interval level PDCCH to be used as the interval level PDCCH monitoring selection combination.

Optionally, based on the interval level PDCCH monitoring selection combination, the upper limit value of the interval level PDCCH blind detection number of the PDCCH subcarrier interval μ is determined andthe interval level PDCCH non-overlapping CCE number upper limit value comprises the following steps: receiving the number of all Rel-16PDCCH service cells configured by the base station

Number of downlink cells monitored by Rel-16PDCCH

And the number of cells adopting the interval level PDCCH to monitor the selective combination (X, Y) in the downlink cells monitored by the Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Greater than the monitoring capability upper limit of the UE itself

Determining the interval grade PDCCH blind detection number upper limit value of the PDCCH subcarrier interval mu

And interval level PDCCH non-overlapping CCE number upper limit value of PDCCH subcarrier interval mu

Optionally, the following formula is adopted to determine the upper limit value of the interval level PDCCH blind detection number of the preset PDCCH subcarrier interval:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

used for indicating the number of cells adopting the interval level PDCCH monitoring selection combination (X, Y) in a downlink cell monitored by the Rel-16PDCCH,

is used for indicating the number of downlink cells monitored by the Rel-16PDCCH,

for indicating an interval level PDCCH listening candidate upper limit value,

is used for representing a rounding-down operation, and mu is used for representing the preset PDCCH subcarrier interval.

Optionally, the following formula is adopted to determine the upper limit value of the number of non-overlapping CCEs in the PDCCH at the interval level of the PDCCH subcarrier spacing μ:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for representingThe number of downlink cells monitored by the Rel-16PDCCH,

used to represent interval level PDCCH non-overlapping CCE upper limit values,

To solve the above technical problem, an embodiment of the present invention provides a method for configuring a PDCCH based on multiple TRPs, including the following steps: respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs; judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource; determining interval-level PDCCH monitoring selection combination according to the judgment result; determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value of a preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination; and determining a search space for transmitting downlink control information according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

Optionally, determining, according to the determination result, the interval PDCCH monitoring selection combination includes: and if the interval level PDCCH monitoring combinations of the plurality of TRPs are the same and the interval level PDCCH monitoring of each TRP starts from the same symbol of the time domain resource, adopting any interval level PDCCH monitoring combination as the interval level PDCCH monitoring selection combination.

Judging whether the number of interval-level PDCCH blind tests exceeds the upper limit value of the number of interval-level PDCCH blind tests and whether the number of interval-level PDCCH non-overlapping CCE exceeds the upper limit value of the number of interval-level PDCCH non-overlapping CCE in the time domain resource of the system; determining a search space monitored by the PDCCH with the PDCCH subcarrier spacing mu based on the judgment result; wherein I is a positive integer, 0 < I < I, I being used to indicate the number of the plurality of TRPs.

Optionally, determining, according to the determination result, the interval PDCCH monitoring selection combination includes: if the interval level PDCCH monitoring combinations of the TRPs are different, determining the time domain resource of the search space monitoring time of each CORESET; adding all time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection; and according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the adjacent previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH, and a maximum number Y of the symbols monitored by the interval level PDCCH to be used as the interval level PDCCH monitoring selection combination.

Optionally, based on the interval level PDCCH monitoring selection combination, an upper limit value of interval level PDCCH blind detection number and an interval level PDCCH non-blind detection number of the preset PDCCH subcarrier interval are determinedThe upper limit value of the number of overlapping CCEs comprises the following steps: configuring and transmitting the number of all Rel-16PDCCH serving cells

Number of downlink cells monitored by Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Greater than the monitoring capability upper limit of the UE itself

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for indicating an interval level PDCCH listening candidate upper limit value,

Optionally, the following formula is adopted to determine the upper limit value of the number of non-overlapping CCEs of the interval level PDCCH at the preset PDCCH subcarrier interval:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for indicating Rel-16PDCCH monitoringThe number of downlink cells of (1),

used to represent interval level PDCCH non-overlapping CCE upper limit values,

To solve the above technical problem, an embodiment of the present invention provides a monitoring apparatus for a PDCCH based on multiple TRPs, including: the first monitoring combination determining module is used for respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs; a first judging module, configured to judge whether the inter-level PDCCH monitoring combinations of the multiple TRPs are the same, and whether inter-level PDCCH monitoring of each TRP starts from a symbol of the same time domain resource; the first selection combination determining module is used for determining interval-level PDCCH monitoring selection combinations according to the judgment result; a first upper limit determining module, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of interval-level PDCCH blind detection numbers and an upper limit of interval-level PDCCH non-overlapping CCE numbers of preset PDCCH subcarrier intervals; and the monitoring search space determining module is used for determining the search space for PDCCH monitoring at the preset PDCCH subcarrier interval according to the interval level PDCCH blind detection number upper limit value and the interval level PDCCH non-overlapping CCE number upper limit value.

To solve the above technical problem, an embodiment of the present invention provides a device for configuring a PDCCH based on multiple TRPs, including: the second monitoring combination determining module is used for respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs; a second judging module, configured to judge whether the inter-level PDCCH monitoring combinations of the multiple TRPs are the same, and whether inter-level PDCCH monitoring of each TRP starts from a symbol of the same time domain resource; the second selection combination determining module is used for determining interval-level PDCCH monitoring selection combinations according to the judgment result; a second upper limit determining module, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of interval-level PDCCH blind detection numbers and an upper limit of interval-level PDCCH non-overlapping CCE numbers of PDCCH subcarrier intervals μ; and the configuration search space determining module is used for determining a search space for sending the downlink control information according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

To solve the above technical problem, an embodiment of the present invention provides a storage medium having a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above monitoring method for a multi-TRP based PDCCH, and to perform the steps of the above configuration method for a multi-TRP based PDCCH.

In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method for monitoring a PDCCH based on multiple TRPs when running the computer program.

In order to solve the above technical problem, an embodiment of the present invention provides a base station, including a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the configuration method for a multi-TRP-based PDCCH when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the interval level PDCCH monitoring combination (X) of the plurality of TRPs is judged by setting_i,Y_i) Whether the pilot symbols are the same or not and whether the interval level PDCCH monitoring of each TRP starts from the same time domain resource symbol step, and then according to the judgment result, the interval level PDCCH monitoring selection combination (X, Y) is determined, the interval level PDCCH monitoring selection combination (X, Y) can be uniquely determined under the scene of a plurality of TRPs, so that the UE can determine the search space monitored by the PDCCH based on (X, Y), and the base station can determine the search space configured by the PDCCH based on the same (X, Y), thereby improving the accuracy of communication and filling the blank in the prior art.

Further, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) Same and interval level PDCCH monitoring of each TRPListening to symbols all originating from the same time domain resource, one of the PDCCH monitoring combinations (X) at any interval level may be selected_i,Y_i) And the selected combination (X, Y) is monitored by the interval-level PDCCH, so that the UE and the base station determine a search space based on the same (X, Y), and the accuracy of communication is improved.

Further, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH of each TRP monitors symbols starting from different time domain resources, it is possible to monitor each TRP_iRespectively selecting time domain resources T monitored by any interval level PDCCH of the current time slot_iAnd is incorporated in

The time domain resource of the invention judges the upper limit value of the interval level PDCCH blind detection number and the upper limit value of the interval level PDCCH non-overlapping CCE number, if the condition of exceeding the upper limit value exists, the highest index search space set is totally or partially discarded, and by adopting the scheme of the embodiment of the invention, whether the space is in a span can be further checked on the basis of satisfying the limitation

Also meets the limitation in the time domain resource, thereby better meeting the communication requirement.

Further, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) If the time domain resources of the search space monitoring moments of the CORESET are different, the time domain resources of the search space monitoring moments of the CORESET can be added to obtain a time domain resource collection, and then (X, Y) is determined based on the time domain resource collection.

Further, when the number of all the Rel-16PDCCH serving cells is larger than the monitoring capability upper limit of the UE, the interval level PDCCH blind detection number upper limit value of the PDCCH subcarrier interval mu and the interval level PDCCH non-overlapping CCE number upper limit value of the PDCCH subcarrier interval mu are determined, so that calculation and subsequent discarding operation are carried out only under the condition that the UE capability is not achieved, and resources are effectively saved.

Drawings

Fig. 1 is a flowchart of a monitoring method for a multi-TRP-based PDCCH in an embodiment of the present invention;

FIG. 2 is a diagram of a first multi-TRP inter-level PDCCH monitoring selection combination (X, Y) according to an embodiment of the present invention;

fig. 3 is a diagram illustrating a second multi-TRP PDCCH monitoring selection combination (X, Y) according to an embodiment of the present invention;

fig. 4 is a diagram illustrating a third multi-TRP PDCCH monitoring selection combination (X, Y) according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for configuring a multi-TRP-based PDCCH in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a monitoring apparatus for a multi-TRP-based PDCCH according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an apparatus for configuring a multi-TRP-based PDCCH according to an embodiment of the present invention.

Detailed Description

As mentioned above, in the Rel-15 system, slot-level PDCCH blind detection limitation and non-overlapping CCE limitation are used. That is, the base station (gNB) and the terminal (User Equipment, UE) will determine whether the above-mentioned limitation is satisfied in a time slot, and if not, discard the highest index search space set in the time slot.

Table 1 shows the maximum number of PDCCH candidates monitored in a time slot in a serving cell

μ e {0,1,2,3} in relation to the subcarrier spacing μ.

TABLE 1

Table 2 shows the maximum number of non-overlapping CCEs monitored in a time slot in a serving cell

Associated with the subcarrier spacing mu. Non-overlapping CCEs are defined to belong to different sets of control resources, or the starting OFDM symbols of PDCCH candidates are different.

TABLE 2

If the UE can support the carrier aggregation of 4 downlink cells at maximum, and for different subcarrier intervals mu, the UE is configured with

A downlink scheduling cell and

UE expects maximum listening per cell per timeslot

The PDCCH candidates (candidates containing different DCI sizes and different DMRS scrambling sequences) are the largest per cell per slot

A number of non-overlapping CCEs.

If the UE can support the carrier aggregation of more than 4 downlink cells, the high-level signaling indicates that the UE monitors the downlink cells

For different subcarrier spacing mu, the UE configures

And each downlink scheduling cell. UE is in

Each of the downlink cells needs to monitor in total per timeslot

A number of PDCCH candidates (including candidates of different DCI sizes and different DMRS scrambling sequences),

a number of non-overlapping CCEs. And the UE expects maximum listening per cell per slot

A number of non-overlapping CCEs.

In a cell configuration in the prior art, for example, the PDCCH capability reported by the UE is 4, that is, the PDCCH blind detection and non-overlapping CCE detection capabilities of 4 carriers are supported at maximum. When the UE configures 5 cells, i.e. greater than the UE reporting capability, it needs to be calculated as above.

Specifically, there are two cells, i.e., a primary cell (Pcell) and a secondary cell (scell 1), in which PDCCH may be transmitted. Wherein, the PCell is 15kHz SCS, and scell2 and scell4 can be scheduled by the cell and cross-cell. Scell1 is 30kHz SCS, and can be used for scheduling in the local cell and scheduling Scell5 in a cross-cell manner. According to the above formula, the PDCCH blind detection and non-overlapping CCE limit per slot are calculated per scheduling cell SCS. The PDCCH blind detection limit per slot of Pcel, scell2, scell3 is 4 × 44 × 3/5, and the non-overlapping CCEs are limited to 4 × 56 × 3/5. The PDCCH blind detection per slot of Scell1 and Scell5 is limited to 4 × 36 × 2/5, and the non-overlapping CCEs are limited to 4 × 56 × 2/5.

In a Rel-16 new air interface NR system, UE adopts span-level PDCCH monitoring, and introduces blind detection limit and non-overlapping CCE limit in span. That is, the gNB and the UE determine whether the above-mentioned constraint is satisfied within a span, and if not, discard all or part of the highest index search space set within the span.

Specifically, the details of the span-level PDCCH blind detection limitation and non-overlapping CCE limitation are as follows:

TABLE 3 PDCCH monitoring based on granularity levelUpper limit of interval grade PDCCH blind detection number of each service cell of selection combination (X, Y)

Maximum number (Maximum number) of

of monitored PDCCH candidates per span pattern (X, Y) and per serving cell), i.e., PDCCH candidate restriction of intra-cell PDCCH span combination (X, Y), per span for one PDCCH subcarrier spacing μ

TABLE 3

Table 4 shows the number upper limit value of interval level PDCCH non-overlapping CCE of each serving cell based on interval level PDCCH monitoring selection combination (X, Y)

Maximum number (Maximum number) of

of non-overlapped CCEs per span pattern (X, Y) and per serving cell), that is, a PDCCH span combination (X, Y) in a serving cell with a PDCCH subcarrier spacing mu, and PDCCH non-overlapping CCE of per span limits

TABLE 4

The UE may report supported subcarriers μ ═ 0(15kHz) and μ ═ 1(30kHz), and one or more gap level PDCCH monitoring select combinations (2,2), (4,3), and (7, 3).

One span is a set of consecutive symbols in one slot for which the UE monitors the PDCCH. Each PDCCH monitoring instant is within only one span. If the UE monitors the PDCCH in the interval level PDCCH monitoring selection combination (X, Y), the interval between the first symbols of 2 continuous spans of the PDCCH monitored by the UE is more than or equal to X, including the condition of crossing time slots. One span starts at the starting position of the PDCCH monitoring time and ends at the ending position of the PDCCH monitoring time, wherein the number of symbols of the span is at most Y.

The inventor of the present invention has found through research that, in the Rel-16 NR system, for a single TRP, a base station and a terminal determine whether the above-mentioned limitation is satisfied within a span, and if not, discard all or part of the highest index search space set within the span. However, for the case of multiple TRPs, there is no technical solution to support Rel-16PDCCH monitoring.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, fig. 1 is a flowchart of a method for monitoring a multi-TRP-based PDCCH according to an embodiment of the present invention. The method for monitoring the multi-TRP-based PDCCH may be used at a terminal side, and may further include steps S11 to S15:

step S11: respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs;

step S12: judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource;

step S13: determining interval-level PDCCH monitoring selection combination according to the judgment result;

step S14: determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value of a preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination;

step S15: and determining a search space for PDCCH monitoring at a preset PDCCH subcarrier interval according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

In a specific implementation of step S11, the terminal may determine interval level PDCCH monitoring combinations (X) of the plurality of TRPs, respectively_i,Y_i)。

Further, interval level PDCCH monitoring combinations (X) of the plurality of TRPs are respectively determined_i,Y_i) The step (b) may comprise: for each TRP_iAccording to the search space monitoring time of all CORESETs belonging to CORESET pool index (i-1), determining the minimum interval X between the first symbol monitored by the adjacent PDCCH in the previous interval level and the first symbol monitored by the PDCCH in the next interval level_iAnd the maximum number Y of symbols monitored by the interval-level PDCCH_iIn order to monitor the combination (X) with the interval level PDCCH as CORESET pool index (i-1)_i,Y_i) (ii) a Wherein i is a positive integer.

In a specific implementation, the base station may configure different CORESET pools to which different CORESET pools belong through high-layer signaling. Different CORESET pools represent different TRPs, e.g. a CORESET pool with index 0 represents TRP1, a CORESET pool with index 1 represents TRP2, etc. Further, the interval level PDCCH monitoring combination (X) of the CORESET pool index 0 can be generated from the search space monitoring time of all CORESETs belonging to the CORESET pool index 0₁,Y₁) The interval level PDCCH monitoring combination (X) of the CORESET pool index 1 may be generated from the search space monitoring time of all CORESETs belonging to the CORESET pool index 1₂,Y₂) And so on.

It is noted that interval level PDCCH monitoring combination (X) may be generated according to the CORESET pool in the conventional manner_i,Y_i) For example, one span starts at the start position of the PDCCH monitoring time and ends at the end position of the PDCCH monitoring time, where the number of symbols of the span is at most Y.

In a specific implementation of step S12, the UE may determine the interval-level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) Whether they are the same and whether the interval level PDCCH of each TRP monitors symbols starting from the same time domain resource.

In the embodiment of the invention, the PDCCH monitoring combination (X) at the judgment interval level is set_i,Y_i) And whether interval level PDCCH monitoring starts from symbols of the same time domain resource can be effectively classified for different conditions, and further interval level PDCCH monitoring combinations (X, Y) which can be used for multiple TRPs are determined for different conditions.

In a specific implementation of step S13, the terminal may determine the interval-level PDCCH monitoring selection combination (X, Y) according to the determination result.

In a first determination result of the embodiment of the present invention, the interval-level PDCCH monitoring combinations (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH monitoring of each TRP starts from the same symbol of the time domain resource, at this time, any interval level PDCCH monitoring combination (X) can be adopted_i,Y_i) Monitoring a selection combination (X, Y) as the interval level PDCCH.

Referring to fig. 2, fig. 2 is a schematic diagram of a first multi-TRP inter-level PDCCH monitoring selection combination (X, Y) in an embodiment of the present invention.

As can be seen from fig. 2, the 2 TRP granularity PDCCH monitors symbols that all start from the same time domain resource.

As shown in fig. 2, the interval level PDCCH monitoring combination of TRP1 may be determined to be (2,2) according to search space 1 and search space 2 of TRP1, i.e., search space 1 and search space 2 associated to CORESET1 (belonging to CORESET pool 0); from the search space 1 of TRP1, i.e. the search space 1 associated to CORESET2 (belonging to CORESET pool 1), the gap level PDCCH monitoring combination of TRP2 is also determined to be (2, 2).

In the embodiment of the present invention, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH monitoring of each TRP starts from the same symbol of the time domain resource, any one interval level PDCCH monitoring combination (X) can be selected_i,Y_i) And the selected combination (X, Y) is monitored by the interval-level PDCCH, so that the UE and the base station determine a search space based on the same (X, Y), and the accuracy of communication is improved.

In a second determination result of the embodiment of the present invention, the interval-level PDCCH monitoring combinations (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH of each TRP monitors symbols starting from different time domain resources, and at this time, any one interval level PDCCH monitoring combination (X) may be adopted_i,Y_i) Monitoring a selection combination (X, Y) as the interval level PDCCH.

Referring to fig. 3, fig. 3 is a diagram illustrating a second multi-TRP granularity level PDCCH monitoring selection combination (X, Y) according to an embodiment of the present invention.

As can be seen from fig. 3, the 2 TRP space-level PDCCH monitors symbols starting from different time domain resources.

As shown in fig. 3, the interval level PDCCH monitoring combination of TRP1 may be determined to be (2,2) according to search space 1 and search space 2 of TRP1, i.e., search space 1 and search space 2 associated to CORESET1 (belonging to CORESET pool 0); from the search space 1 of TRP1, i.e. the search space 1 associated to CORESET2 (belonging to CORESET pool 1), the gap level PDCCH monitoring combination of TRP2 is also determined to be (2, 2).

In the embodiment of the present invention, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH of each TRP monitors symbols starting from different time domain resources, any one interval level PDCCH monitoring combination (X) can be selected_i,Y_i) And the selected combination (X, Y) is monitored by the interval-level PDCCH, so that the UE and the base station determine a search space based on the same (X, Y), and the accuracy of communication is improved.

It should be noted that, although the solutions for determining interval level PDCCH monitoring selection combination (X, Y) shown in fig. 2 and fig. 3 may be adopted in any interval level PDCCH monitoring combination (X)_i,Y_i) As the interval level PDCCH monitoring selection combination (X, Y), however, in the case shown in fig. 3, there may be a difference in a search space in which the terminal determines PDCCH monitoring of PDCCH subcarrier spacing μ.

Specifically, according to the interval-level PDCCH blind detection number upper limit value

And interval level PDCCH non-overlapping CCE number upper limit value

The step of determining a search space for PDCCH monitoring at a PDCCH subcarrier spacing μmay include: traversing individual TRPs_iRespectively selecting any interval-level PDCCH monitored time domain resource T of the current time slot_i(ii) a In that

As shown in FIG. 3, TRP was selected₁Select TRP for

time domain resources

0 and 1 monitored by PDCCH of the first interval level in (1)₂The

time domain resources

11 and 12 monitored by the last interval level PDCCH in the system are obtained

Are

0,1, 11 and 12.

In the technical solution for determining the interval level PDCCH monitoring selection combination (X, Y) shown in fig. 2, it is only determined that the limitation is satisfied within the span, for example, it is only determined whether the upper limit of the interval level PDCCH blind detection number is satisfied within the

time domain resources

0 and 1

And interval level PDCCH non-overlapping CCE number upper limit value

If the limit is satisfied, due to TRP₁And TRP₂Starting from the same symbol of the time domain resource, it can be seen that the constraint is also satisfied in other time domain resources, such as

time domain resources

12 and 13.

However, in the technical scheme of determining interval level PDCCH monitoring selection combination (X, Y) shown in fig. 3, TRP is used₁And TRP₂Starting from symbols of different time domain resources, time domain resources monitored by any interval level PDCCH of a current time slot need to be selected in each TRP respectively, and then judgment is carried out.

In the embodiment of the present invention, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and the interval level PDCCH of each TRP monitors symbols starting from different time domain resources, it is possible to monitor each TRP_iRespectively selecting time domain resources T monitored by any interval level PDCCH of the current time slot_iAnd is incorporated in

It will be appreciated that if the limits are not met or within the span

Does not meet the limit in the time domain resource, for example, the number of interval-level PDCCH blind detections exceeds the upper limit value of the number of interval-level PDCCH blind detections

Or the number of the non-overlapping CCEs of the interval level PDCCH exceeds the upper limit value of the number of the non-overlapping CCEs of the interval level PDCCH

The highest indexed search space set may be discarded until the limit is met, at which point the search space for PDCCH monitoring for the determined PDCCH subcarrier spacing μmay be reduced.

In a third determination result of the embodiment of the present invention, the interval-level PDCCH monitoring combinations (X) of the plurality of TRPs_i,Y_i) In contrast, at this time, a time domain resource collection needs to be determined, and it is satisfied that the limitation is satisfied in all time domain resources.

Specifically, according to the determination result, the step of determining the interval level PDCCH monitoring selection combination (X, Y) may include: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) If not, determining the time domain resource of the search space monitoring time of each CORESET; adding the time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection; and according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH adjacent to each other and a maximum number Y of the symbols monitored by the interval level PDCCH to serve as the interval level PDCCH monitoring selection combination (X, Y).

Referring to fig. 4, fig. 4 is a diagram illustrating a third multi-TRP granularity level PDCCH monitoring selection combination (X, Y) according to an embodiment of the present invention.

As shown in fig. 4, the interval level PDCCH monitoring combination of TRP1 may be determined to be (4,3) according to search space 1 and search space 2 of TRP1, i.e., search space 1 and search space 2 associated to CORESET1 (belonging to CORESET pool 0); the gap-level PDCCH monitoring combination of TRP2 is determined to be (7,3) according to search space 1 of TRP1, i.e. search space 1 associated to CORESET2 (belonging to CORESET pool 1).

And adding the time domain resources of the monitoring time of the search space of each CORESET to obtain a time domain resource set, namely

time domain resources

0,1, 4, 5, 8 and 9.

And then according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH adjacent to each other and a maximum number Y of the symbols monitored by the interval level PDCCH to serve as the interval level PDCCH monitoring selection combination (X, Y).

Specifically, one span starts at the starting position of the PDCCH monitoring time and ends at the ending position of the PDCCH monitoring time, wherein the number of symbols of the span is at most Y. As can be seen from fig. 4, X is 4 and Y is 2.

It should be noted that, the interval level PDCCH monitoring selection combination (X, Y) that can be obtained from the time domain resource collection is (4,2), and since only (4,3) is specified in the existing communication protocol, but not (4,2), the interval level PDCCH monitoring selection combination (X, Y) is determined to be (4, 3).

In the embodiment of the present invention, if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) If the time domain resources of the search space monitoring moments of the CORESET are different, the time domain resources of the search space monitoring moments of the CORESET can be added to obtain a time domain resource collection, and then (X, Y) is determined based on the time domain resource collection.

With continued reference to FIG. 1, in an implementation of step S14, the terminal may be based on the time betweenThe selective combination (X, Y) is monitored by the level PDCCH, and the upper limit value of the blind detection number of the level PDCCH for determining the PDCCH subcarrier spacing mu

And interval level PDCCH non-overlapping CCE number upper limit value

Further, based on the interval level PDCCH monitoring selection combination (X, Y), determining the interval level PDCCH blind detection number upper limit value of PDCCH subcarrier interval mu

And interval level PDCCH non-overlapping CCE number upper limit value

The step (b) may comprise: receiving the number of all Rel-16PDCCH service cells configured by the base station

Number of downlink cells monitored by Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Greater than the monitoring capability upper limit of the UE itself

In the embodiment of the present invention, the terminal may first receive a part of parameters from the base station, and determine the interval level PDCCH listening candidate upper limit value through the foregoing table

And interval level PDCCH non-overlapping CCE upper limit value

And when the number of all Rel-16PDCCH service cells is larger than the monitoring capability upper limit of the UE, determining the interval level PDCCH blind detection number upper limit value of the PDCCH subcarrier interval mu and the interval level PDCCH non-overlapping CCE number upper limit value of the PDCCH subcarrier interval mu, thereby performing calculation and subsequent discarding operation only under the condition that the UE capability is not reached, and effectively saving resources.

Furthermore, the terminal may determine an interval-level PDCCH blind detection number upper limit value of the PDCCH subcarrier interval μ by using the following formula

Wherein the content of the first and second substances,

for indicating aThe upper limit of the listening capability of the UE itself,

for indicating an interval level PDCCH listening candidate upper limit value,

for indicating a rounding down operation.

Furthermore, the terminal can determine the interval level PDCCH non-overlapping CCE number upper limit value of the PDCCH subcarrier interval mu by adopting the following formula

Wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

used to represent interval level PDCCH non-overlapping CCE upper limit values,

for indicating a rounding down operation.

In the specific implementation of step S15, the terminal may detect the upper limit value of the number according to the PDCCH blind detection of the separation level

And interval level PDCCH non-overlapping CCE number upper limit value

And determining a search space monitored by the PDCCH with the PDCCH subcarrier spacing mu.

Specifically, when the configured PDCCH blind detection number and non-overlapping CCEs exceed the above-mentioned limit, the terminal may discard the highest index search space set until the interval level PDCCH blind detection number upper limit value is met

And interval level PDCCH non-overlapping CCE number upper limit value

Until now.

Referring to fig. 5, fig. 5 is a flowchart of a method for configuring a multi-TRP-based PDCCH according to an embodiment of the present invention. The method for configuring the multi-TRP-based PDCCH may be used on the base station side, and may further include steps S51 to S55:

step S51: respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs;

step S52: judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource;

step S53: determining interval-level PDCCH monitoring selection combination according to the judgment result;

step S54: determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value of a preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination;

step S55: and determining a search space of a preset PDCCH subcarrier interval for transmitting downlink control information according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

It should be noted that the base station and the terminal may determine the interval level PDCCH monitoring selection combination (X, Y) based on the same determination manner, so that the UE may determine the search space for PDCCH monitoring based on (X, Y), and the base station may determine the search space for PDCCH configuration based on the same (X, Y), thereby improving the accuracy of communication.

In the specific implementation, more details about steps S51 to S54 are described with reference to steps S11 to S14 in fig. 1, and are not described herein again.

In the specific implementation of step S55, the base station may detect the upper limit value of the number of blind detections according to the PDCCH in the interval level

And interval level PDCCH non-overlapping CCE number upper limit value

A search space for transmitting downlink control information is determined.

Specifically, the number of configured PDCCH blind tests and the number of configured PDCCH blind testsWhen the overlapping CCEs exceed the above limit, the base station may discard the highest index search space set until the interval level PDCCH blind detection number upper limit value is satisfied

And interval level PDCCH non-overlapping CCE number upper limit value

Until now.

In the embodiment of the invention, the interval level PDCCH monitoring combination (X) of the plurality of TRPs is judged by setting_i,Y_i) Whether the pilot symbols are the same or not and whether the interval level PDCCH monitoring of each TRP starts from the same time domain resource symbol step, and then according to the judgment result, the interval level PDCCH monitoring selection combination (X, Y) is determined, the interval level PDCCH monitoring selection combination (X, Y) can be uniquely determined under the scene of a plurality of TRPs, and further the base station can determine the search space configured by the PDCCH based on the same (X, Y) with the UE, the communication accuracy is improved, and the blank in the prior art is filled.

Further, according to the determination result, the step of determining the interval level PDCCH monitoring selection combination (X, Y) may include: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and interval level PDCCH monitoring of each TRP starts from the same symbol of time domain resource, then any interval level PDCCH monitoring combination (X) is adopted_i,Y_i) As the interval level PDCCH monitoring selection combination(X,Y)。

Further, according to the determination result, the step of determining the interval level PDCCH monitoring selection combination (X, Y) may include: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) The same, and interval level PDCCH monitoring of each TRP starts from the same symbol of time domain resource, then any interval level PDCCH monitoring combination (X) is adopted_i,Y_i) Monitoring a selection combination (X, Y) as the interval level PDCCH.

Furthermore, according to the interval PDCCH blind detection number upper limit value

And interval level PDCCH non-overlapping CCE number upper limit value

Further, according to the determination result, determining the interval level PDCCH monitoring selection combination (X, Y) includes: if the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) If not, determining each CORESETMonitoring time domain resources of the moment by the search space; adding all time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection; and according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH adjacent to each other and a maximum number Y of the symbols monitored by the interval level PDCCH to serve as the interval level PDCCH monitoring selection combination (X, Y).

And interval level PDCCH non-overlapping CCE number upper limit value

The method comprises the following steps: configuring and transmitting the number of all Rel-16PDCCH serving cells

Number of downlink cells monitored by Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Larger than the UE itselfUpper limit of listening capacity of

Furthermore, the interval grade PDCCH blind detection number upper limit value of the PDCCH subcarrier interval mu is determined by adopting the following formula

Wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for indicating an interval level PDCCH listening candidate upper limit value,

for indicating rounding-downAnd (4) calculating.

Further, determining an interval level PDCCH non-overlapping CCE number upper limit value of the PDCCH subcarrier interval mu by adopting the following formula

Wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

used to represent interval level PDCCH non-overlapping CCE upper limit values,

for indicating a rounding down operation.

For the principle, specific implementation and beneficial effects of the configuration method of the multi-TRP-based PDCCH, please refer to the related description of the monitoring method of the multi-TRP-based PDCCH described above, and details are not repeated herein.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a monitoring apparatus for a multi-TRP-based PDCCH according to an embodiment of the present invention. The monitoring apparatus for the multi-TRP based PDCCH may be used at a terminal side, and may further include:

a first monitoring combination determining module 61, configured to determine interval-level PDCCH monitoring combinations of multiple TRPs, respectively;

a first determining module 62, configured to determine whether the gap-level PDCCH monitoring combinations of the multiple TRPs are the same, and whether the gap-level PDCCH monitoring of each TRP starts from a symbol of the same time domain resource;

a first selection combination determining module 63, configured to determine, according to the determination result, a spacing-level PDCCH monitoring selection combination;

a first upper limit determining module 64, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of an interval-level PDCCH blind detection number and an upper limit of a non-overlapping CCE number of an interval-level PDCCH at a preset PDCCH subcarrier interval;

and a monitoring search space determining module 65, configured to determine a search space for PDCCH monitoring at a preset PDCCH subcarrier interval according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

For the principle, specific implementation and beneficial effects of the monitoring apparatus for multi-TRP-based PDCCH, please refer to the related description of the monitoring method for multi-TRP-based PDCCH described above, and details are not repeated herein.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an apparatus for configuring a multi-TRP-based PDCCH according to an embodiment of the present invention. The configuration apparatus of the multi-TRP-based PDCCH may be used on a base station side, and may further include:

a second monitoring combination determining module 71, configured to determine interval-level PDCCH monitoring combinations of a plurality of TRPs, respectively;

a second determining module 72, configured to determine whether the inter-level PDCCH monitoring combinations of the multiple TRPs are the same, and whether the inter-level PDCCH monitoring of each TRP starts from a symbol of the same time domain resource;

a second selection combination determining module 73, configured to determine, according to the determination result, a spacing-level PDCCH monitoring selection combination;

a second upper limit determining module 74, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of interval-level PDCCH blind detection numbers and an upper limit of interval-level PDCCH non-overlapping CCE numbers of preset PDCCH subcarrier intervals;

and a search space determining module 75 configured to determine a search space for sending downlink control information according to the upper limit of the number of interval-level PDCCH blind detections and the upper limit of the number of interval-level PDCCH non-overlapping CCEs.

For the principle, specific implementation and beneficial effects of the apparatus for configuring a multi-TRP-based PDCCH, please refer to the related description of the method for configuring a multi-TRP-based PDCCH described above, and details are not repeated herein.

Embodiments of the present invention also provide a storage medium having a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above method. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.

Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SLDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

An embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method shown in fig. 1 when running the computer program. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.

Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores a computer program capable of running on the processor, and the processor executes the steps of the method shown in fig. 5 when running the computer program.

Specifically, a Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.

The base station controller in the embodiment of the present application is a device for managing a base station, for example, a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, or a device for controlling and managing a base station in a future new communication system.

The network on the network side in the embodiment of the present invention refers to a communication network providing communication services for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.

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

1. A monitoring method of PDCCH based on multiple TRPs is characterized by comprising the following steps:

respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs;

judging whether interval level PDCCH monitoring combinations of the plurality of TRPs are the same and whether interval level PDCCH monitoring of each TRP starts from symbols of the same time domain resource;

determining interval-level PDCCH monitoring selection combination according to the judgment result;

determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value of a preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination;

and determining a search space monitored by the PDCCH at the preset PDCCH subcarrier interval according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

2. The method of monitoring the PDCCH according to claim 1, wherein determining the interval-level PDCCH monitoring combination of the plurality of TRPs, respectively, comprises:

for each TRP_iAccording to the search space monitoring time of all CORESETs belonging to CORESET pool index (i-1), determining the minimum interval X between the first symbol monitored by the adjacent PDCCH in the previous interval level and the first symbol monitored by the PDCCH in the next interval level_iAnd the maximum number Y of symbols monitored by the interval-level PDCCH_iIn order to monitor the combination (X) with the interval level PDCCH as CORESET pool index (i-1)_i,Y_i)；

Wherein i is a positive integer.

3. The method of claim 1, wherein determining the interval-level PDCCH monitoring selection combination according to the determination result comprises:

and if the interval level PDCCH monitoring combinations of the plurality of TRPs are the same and the interval level PDCCH monitoring of each TRP starts from the same symbol of the time domain resource, adopting any interval level PDCCH monitoring combination as the interval level PDCCH monitoring selection combination.

4. The method of claim 1, wherein determining the interval-level PDCCH monitoring selection combination according to the determination result comprises:

and if the interval level PDCCH monitoring combinations of the plurality of TRPs are the same and the interval level PDCCH of each TRP monitors symbols starting from different time domain resources, adopting any interval level PDCCH monitoring combination as the interval level PDCCH monitoring selection combination.

5. The method of claim 4, wherein determining the search space for PDCCH monitoring in the PDCCH subcarrier spacing according to the interval-level PDCCH blind detection number upper limit and the interval-level PDCCH non-overlapping CCE number upper limit comprises:

traversing individual TRPs_iRespectively selecting any interval-level PDCCH monitored time domain resource T of the current time slot_i；

In that

Judging whether the number of interval-level PDCCH blind tests exceeds the upper limit value of the number of interval-level PDCCH blind tests and whether the number of interval-level PDCCH non-overlapping CCE exceeds the upper limit value of the number of interval-level PDCCH non-overlapping CCE in the time domain resource of the system;

determining a search space monitored by the PDCCH with the preset PDCCH subcarrier interval based on a judgment result;

wherein I is a positive integer, 0 < I < I, I being used to indicate the number of the plurality of TRPs.

6. The method of claim 1, wherein determining the interval-level PDCCH monitoring selection combination according to the determination result comprises:

if the interval level PDCCH monitoring combinations of the TRPs are different, determining the time domain resource of the search space monitoring time of each CORESET;

adding the time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection;

and according to the time domain resource collection, determining a minimum interval X between a first symbol monitored by the adjacent previous interval level PDCCH and a first symbol monitored by the next interval level PDCCH, and a maximum number Y of the symbols monitored by the interval level PDCCH to be used as the interval level PDCCH monitoring selection combination.

7. The method of claim 1, wherein determining an interval level PDCCH blind detection number upper limit value and an interval level PDCCH non-overlapping CCE number upper limit value in the preset PDCCH subcarrier interval based on the interval level PDCCH monitoring selection combination comprises:

receiving the number of all Rel-16PDCCH service cells configured by the base station

Number of downlink cells monitored by Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Greater than the monitoring capability upper limit of the UE itself

8. The method according to claim 7, wherein the interval-level PDCCH blind detection number upper limit value of the PDCCH subcarrier spacing μ is determined by using the following formula:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for indicating an interval level PDCCH listening candidate upper limit value,

9. The method according to claim 7, wherein the interval level PDCCH non-overlapping CCE number upper limit value of the PDCCH subcarrier spacing μ is determined by the following formula:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

used to represent interval level PDCCH non-overlapping CCE upper limit values,

10. A configuration method of PDCCH based on multiple TRPs is characterized by comprising the following steps:

and determining a search space for transmitting downlink control information according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

11. The method of configuring the PDCCH according to claim 10, wherein determining the interval-level PDCCH monitoring combinations of the plurality of TRPs respectively comprises:

Wherein i is a positive integer.

12. The method of claim 10, wherein determining the gap-level PDCCH monitoring selection combination according to the determination result comprises:

13. The method of claim 10, wherein determining the gap-level PDCCH monitoring selection combination according to the determination result comprises:

14. The method of claim 13, wherein determining the search space for PDCCH monitoring at a preset PDCCH subcarrier interval according to the interval level PDCCH blind detection number upper limit and the interval level PDCCH non-overlapping CCE number upper limit comprises:

In that

15. The method of claim 10, wherein determining the gap-level PDCCH monitoring selection combination according to the determination result comprises:

adding all time domain resources of the search space monitoring time of each CORESET to obtain a time domain resource collection;

16. The method of claim 10, wherein determining an interval-level PDCCH blind detection number upper limit value and an interval-level PDCCH non-overlapping CCE number upper limit value for the preset PDCCH subcarrier interval based on the interval-level PDCCH monitoring selection combination comprises:

configuring and transmitting the number of all Rel-16PDCCH serving cells

Number of downlink cells monitored by Rel-16PDCCH

Determining interval PDCCH listening candidate upper limit value

And interval level PDCCH non-overlapping CCE upper limit value

If it is said

Greater than the monitoring capability upper limit of the UE itself

Determining the PDCCH subcarrier spacingMu interval-level PDCCH blind detection number upper limit value

17. The method according to claim 16, wherein the upper limit value of the number of interval-level PDCCH blind detections in the preset PDCCH subcarrier interval is determined by using the following formula:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

for indicating an interval level PDCCH listening candidate upper limit value,

18. The method according to claim 16, wherein the interval level PDCCH non-overlapping CCE number upper limit value of the preset PDCCH subcarrier interval is determined by using the following formula:

wherein the content of the first and second substances,

for indicating the listening capability upper limit of the UE itself,

used to represent interval level PDCCH non-overlapping CCE upper limit values,

19. A monitoring device for PDCCH based on multiple TRPs, comprising:

the first monitoring combination determining module is used for respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs;

a first judging module, configured to judge whether the inter-level PDCCH monitoring combinations of the multiple TRPs are the same, and whether inter-level PDCCH monitoring of each TRP starts from a symbol of the same time domain resource;

the first selection combination determining module is used for determining interval-level PDCCH monitoring selection combinations according to the judgment result;

a first upper limit determining module, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of interval-level PDCCH blind detection numbers and an upper limit of interval-level PDCCH non-overlapping CCE numbers of preset PDCCH subcarrier intervals;

and the monitoring search space determining module is used for determining the search space for PDCCH monitoring at the preset PDCCH subcarrier interval according to the interval level PDCCH blind detection number upper limit value and the interval level PDCCH non-overlapping CCE number upper limit value.

20. An apparatus for configuring a multi-TRP-based PDCCH, comprising:

the second monitoring combination determining module is used for respectively determining interval level PDCCH monitoring combinations of a plurality of TRPs;

a second judging module for judging the interval level PDCCH monitoring combination (X) of the plurality of TRPs_i,Y_i) Whether the symbols are the same and whether the interval level PDCCH of each TRP monitors the symbols starting from the same time domain resource;

the second selection combination determining module is used for determining interval-level PDCCH monitoring selection combinations according to the judgment result;

a second upper limit determining module, configured to determine, based on the interval-level PDCCH monitoring selection combination, an upper limit of interval-level PDCCH blind detection numbers and an upper limit of interval-level PDCCH non-overlapping CCE numbers of PDCCH subcarrier intervals μ;

and the configuration search space determining module is used for determining a search space for sending the downlink control information according to the interval-level PDCCH blind detection number upper limit value and the interval-level PDCCH non-overlapping CCE number upper limit value.

21. A storage medium having stored thereon a computer program, wherein the computer program when executed by a processor performs the steps of the method for monitoring of a multi-TRP based PDCCH according to any one of claims 1 to 9 and the steps of the method for configuring a multi-TRP based PDCCH according to any one of claims 10 to 18.

22. A terminal comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the method for listening for a multi-TRP based PDCCH according to any one of claims 1 to 9.

23. A base station comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the method for configuring multiple TRP based PDCCH according to any one of claims 10 to 18.