A quasi-co-location information acquisition method, communication node and storage medium

Abstract

This article discloses a method for obtaining quasi-co-location information, a communication node, and a storage medium. The method includes: the communication node obtains the number x and / or determination method of the quasi-co-location reference signal set of the first element according to the first information; wherein the first information includes at least one of the following information: information indicated in the downlink control channel that schedules the first element; the number of quasi-co-location reference signal sets corresponding to the predetermined item codepoint codepoint in the transmission configuration indication state TCI state mapping table; the number of CORESET groups; the maximum number of quasi-co-location reference signal sets corresponding to a codepoint in the TCI state mapping table; the number of time domain repetitions of the first element; the number of quasi-co-location reference signal sets corresponding to the second element.

Description

Technical Field

[0001] The present application relates to a wireless communication network, for example, to a quasi-co-location information acquisition method, a communication node and a storage medium. Background Art

[0002] In high-frequency beam communication, when the interval between the physical downlink control channel (PDCCH) of the scheduling aperiodic channel state information reference signal (AP-CSI-RS) / physical downlink shared channel (PDSCH) and AP-CSI-RS / PDSCH is less than a predetermined threshold, the default quasi-co-site reference signal set is used to determine the quasi-co-site reference signal of AP-CSI-RS / PDSCH. However, when the number of the default quasi-co-site reference signal sets is more than one, the AP-CSI-RS / PDSCH with a scheduling interval less than the predetermined threshold must always be sent with more than one quasi-co-site reference signal set, resulting in a waste of resources. In addition, there is currently no clear definition for the selection method of various default quasi-co-site reference signal determination methods. Summary of the invention

[0003] The present application provides a quasi-co-site information acquisition method, a communication node and a storage medium, which can acquire relevant information of a quasi-co-site reference signal set and avoid waste of resources.

[0004] The present application provides a method for obtaining quasi-co-location information, including:

[0005] The communication node obtains the number x and / or determination method of the quasi co-location reference signal set of the first element according to the first information;

[0006] The first information includes at least one of the following information:

[0007] Information indicated in a downlink control channel scheduling the first element;

[0008] The number of quasi-co-site reference signal sets corresponding to the predetermined item codepoint codepoint in the transmission configuration indication state TCI state mapping table;

[0009] The number of CORESET groups;

[0010] The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table;

[0011] The number of time domain repetitions of the first element;

[0012] The number of quasi co-located reference signal sets corresponding to the second element;

[0013] Among them, the time interval between the downlink control channel of the scheduling first element and the first element is less than a predetermined threshold, and the first element includes at least one of a channel or a signal; the time domain intersection between the second element and the first element is not empty, and the second element includes at least one of an element with a scheduling interval greater than a predetermined threshold, a periodic element, a semi-continuous element, a CORESET, a channel, and a signal; x is a positive integer greater than or equal to 1.

[0014] An embodiment of the present application provides a communication node, including: a processor, wherein the processor is configured to implement the method of any of the above embodiments when executing a computer program.

[0015] An embodiment of the present application further provides a computer-readable storage medium storing a computer program, which implements the method of any of the above embodiments when the computer program is executed by a processor.

[0016] With regard to the above embodiments and other aspects of the present application and their implementation, further description is provided in the accompanying drawings, detailed description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a flow chart of a method for acquiring quasi-co-location information provided by an embodiment;

[0018] Figure 2 A schematic diagram of time domain resources occupied by a first element and a second element provided by an embodiment;

[0019] Figure 3 A schematic diagram of time domain resources occupied by a first element and a plurality of second elements provided by an embodiment;

[0020] Figure 4 A schematic diagram of another time domain resource occupied by a first element and a second element provided by an embodiment;

[0021] Figure 5 A schematic diagram of different frequency domain resource groups of a PDSCH corresponding to different TCI states among x TCI states provided by an embodiment;

[0022] Figure 6 A schematic diagram of two repeated transmissions in one slot provided by an embodiment, where different transmissions correspond to different TCIs;

[0023] Figure 7A schematic diagram of a mapping relationship between four repeated transmissions between slots, four repetition opportunities and two TCI states provided by an embodiment;

[0024] Figure 8 A schematic diagram of another embodiment of four repeated transmissions between slots, a mapping relationship between four repetition opportunities and two TCIstates;

[0025] Fig. 9 A schematic diagram of a PDSCH provided in an embodiment, in which DMRS ports in different CDM groups correspond to different TCI states in x TCIstates;

[0026] Fig.10 A schematic diagram of an embodiment providing that eight repetition transmission opportunities between slots correspond to two default TCI states, and the two default TCI states are changed every two repetition transmission opportunities in the eight repetition transmission opportunities;

[0027] Fig.11 A schematic diagram of an embodiment providing eight repetition transmission opportunities between slots corresponding to two default TCI states, wherein the two default TCI states are changed every other repetition transmission opportunity in the eight repetition transmission opportunities;

[0028] Fig.12 A schematic diagram of an embodiment providing eight repeated transmission opportunities between slots divided into a first transmission opportunity set and a second transmission opportunity set, and the number and / or determination method of different TCI states corresponding to different transmission opportunity sets;

[0029] Fig.13 A schematic diagram of another embodiment providing eight repeated transmission opportunities between slots divided into a first transmission opportunity set and a second transmission opportunity set, and the number and / or determination method of different TCI states corresponding to different transmission opportunity sets;

[0030] Fig.14 A schematic diagram of the structure of a quasi-co-location information acquisition device provided by an embodiment;

[0031] Fig.15 A schematic diagram of the structure of a base station provided by an embodiment. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] The "and / or" mentioned in the embodiments of the present application refers to any and all combinations including one or more of the related listed items. The terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to limit a specific order.

[0034] In high-frequency beam communication, if the transmission configuration indicator state (TCI state) information indicated in the PDCCH for scheduling AP-CSI-RS / PDSCH is to be used for the reception of AP-CSI-RS / PDSCH, then the time interval between the PDCCH for scheduling AP-CSI-RS / PDSCH and the AP-CSI-RS / PDSCH needs to be greater than or equal to a predetermined threshold, because decoding the PDCCH and switching the receiving beam according to the TCI state information indicated by the PDCCH require a certain amount of processing time. For this reason, the current protocol stipulates that when the interval between the PDCCH for scheduling AP-CSI-RS / PDSCH and the AP-CSI-RS / PDSCH is less than a predetermined threshold, the default quasi-co-site reference signal set is used to determine the quasi-co-site reference signal of the AP-CSI-RS / PDSCH. However, when the number of the default quasi-co-located reference signal sets is more than one, the AP-CSI-RS / PDSCH with a scheduling interval less than a predetermined threshold must always be sent with more than one quasi-co-located reference signal set, resulting in a waste of resources and a complex terminal device detection algorithm. The method described in the present application determines the number of quasi-co-located reference signals of elements with a scheduling interval less than a predetermined threshold as needed without increasing signaling overhead, thereby reducing interference and improving system performance.

[0035] The embodiment of the present application provides a mobile communication network (including but not limited to the fifth generation mobile communication network (5th-Generation, 5G)), the network architecture of which may include network-side devices (for example, one or more types of base stations, transmission nodes, access nodes (AP, Access Point), relays, Node B (Node B, NB), terrestrial radio access (UTRA, Universal Terrestrial Radio Access), evolved terrestrial radio access (EUTRA, Evolved Universal Terrestrial Radio Access), etc.) and terminal devices (user equipment (User Equipment, UE), user equipment data card, relay, mobile device, etc.). In an embodiment of the present application, a quasi-co-site information acquisition method, communication node and storage medium that can be run on the above-mentioned network architecture are provided, which can obtain relevant information of a quasi-co-site reference signal set to avoid waste of resources.

[0036] In addition, the quasi-co-location information acquisition method provided in the embodiment of the present application can also solve the following problems:

[0037] 1. In multi-node transmission, how to determine the reception of AP-CSI-RS with a scheduling interval less than a predetermined threshold.

[0038] 2. There are multiple ways to determine the default quasi-co-site reference signal set for PDSCH whose current scheduling interval is less than a predetermined threshold. How to determine when to use which quasi-co-site reference signal set? Without using additional signaling, it is possible to reasonably select from multiple default quasi-co-site reference signal set determination methods and select the determination method that best suits the current scenario.

[0039] 3. In cross-carrier scheduling and multi-node transmission, how to obtain the quasi-co-site reference signal of AP-CSI-RS / PDSCH with a scheduling interval less than a predetermined threshold.

[0040] The following describes the quasi-co-location information acquisition method, communication node and technical effects thereof.

[0041] Figure 1 A schematic diagram of a process for obtaining quasi-co-location information provided by an embodiment is shown. Figure 1 As shown, the method provided in this embodiment is applicable to a communication node, and the method includes the following steps.

[0042] S110. The communication node obtains the number x and / or determination method of the quasi-co-located reference signal set of the first element according to the first information.

[0043] The first information includes at least one of the following information:

[0044] Information indicated in a downlink control channel scheduling the first element;

[0045] The number of quasi-co-site reference signal sets corresponding to the predetermined item codepoint codepoint in the transmission configuration indication state TCI state mapping table;

[0046] The number of CORESET groups;

[0047] The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table;

[0048] The number of time domain repetitions of the first element;

[0049] The number of quasi co-located reference signal sets corresponding to the second element;

[0050] Among them, the time interval between the downlink control channel of the scheduling first element and the first element is less than a predetermined threshold, and the first element includes at least one of a channel or a signal; the time domain intersection between the second element and the first element is not empty, and the second element includes at least one of an element with a scheduling interval greater than a predetermined threshold, a periodic element, a semi-continuous element, a CORESET, a channel, and a signal; x is a positive integer greater than or equal to 1.

[0051] In one embodiment, when the communication node obtains the number x of quasi co-located reference signal sets of the first element according to the first information, the x quasi co-located reference signal sets of the first element belong to a first set, and the first set includes any one of the following sets:

[0052] A set consisting of y quasi-co-site reference signal sets corresponding to the predetermined item codepoint;

[0053] A set consisting of y quasi-co-sited reference signal sets corresponding to the second element;

[0054] Wherein, y is a positive integer greater than or equal to 1, or y is a positive integer greater than or equal to x.

[0055] In one embodiment, the x quasi co-located reference signal sets of the first element include any one of the following sets:

[0056] The first x quasi-co-sited reference signal sets among the y quasi-co-sited reference signal sets;

[0057] The intersection of y quasi co-location reference signal sets and the quasi co-location reference signal set indicated in the downlink control channel scheduling the first element;

[0058] A quasi-co-site reference signal set that meets predetermined characteristics in y quasi-co-site reference signal sets, wherein a quasi-co-site reference signal with associated spatial reception parameters in the quasi-co-site reference signal set that meets the predetermined characteristics and a first quasi-co-site reference signal satisfy a quasi-co-site relationship, and the first quasi-co-site reference signal belongs to a quasi-co-site reference signal with associated spatial reception parameters in a quasi-co-site reference signal set indicated for the first element in a downlink control channel that schedules the first element.

[0059] In one embodiment, when the first set includes y quasi co-located reference signal sets corresponding to the predetermined item codepoint, the first element satisfies at least one of the following characteristics:

[0060] The downlink control channel of the first element is scheduled to be in different frequency domain bandwidths from the first element;

[0061] The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table is greater than 1.

[0062] In one embodiment, the communication node obtains the number x of the quasi co-location reference signal sets of the first element according to the number of CORESET groups, including:

[0063] When the number of CORESET groups is greater than 1, x is equal to 1;

[0064] When the number of CORESET groups is equal to 1, x is less than or equal to the maximum number of quasi co-located reference signal sets corresponding to one codepoint in the TCI state mapping table.

[0065] In one embodiment, the communication node obtains the number x and / or determination method of the quasi co-located reference signal set of the first element according to the time domain repetition number of the first element, including at least one of the following methods:

[0066] The communication node obtains x values ​​for the first transmission opportunity set and the second transmission opportunity set respectively;

[0067] The communication node determines the same x value corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0068] The communication node determines a determination method in which the first transmission opportunity set and the second transmission opportunity set correspond to different quasi co-site reference signal sets respectively;

[0069] The communication node determines a determination method of the same quasi co-site reference signal set corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0070] The communication node corresponds to a set of quasi co-site reference signal sets for the first transmission opportunity set and the second transmission opportunity set, respectively;

[0071] The communication node determines the same quasi co-site reference signal set corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0072] Among them, the number of time domain repetitions of the first element is greater than 1, and the time domain repeated transmission opportunities include a first transmission opportunity set and a second transmission opportunity set, and the time interval between the starting time domain symbol of each transmission opportunity in the first transmission opportunity set and the downlink control channel for scheduling the first element is less than a predetermined threshold; the time interval between the starting time domain symbol of each transmission opportunity in the second transmission opportunity set and the downlink control channel for scheduling the first element is greater than or equal to a predetermined threshold.

[0073] In one embodiment, when the communication node acquires the determination method of the quasi co-location reference signal set of the first element according to the first information, the first information further includes at least one of the following information:

[0074] Whether CORESET is configured in the frequency domain bandwidth where the first element is located;

[0075] Whether the downlink control channel that schedules the first element and the first element are in different frequency domain bandwidths.

[0076] In one embodiment, a method for determining the quasi co-located reference signal set of the first element includes at least one of the following methods:

[0077] In the frequency domain bandwidth where the first element is located, the quasi co-located reference signal set of the first element is obtained according to the quasi co-located reference signal set of the CORESET with the lowest CORESET-ID in the CORESET of the association detection search space in the time slot closest to the first element;

[0078] Acquire a quasi-co-location reference signal of the first element according to a quasi-co-location reference signal of a CORESET with a lowest CORESET-ID in a time unit closest to the first element in a time unit of a CORESET containing a predetermined feature, wherein the CORESET with the predetermined feature includes: the CORESET is in a frequency domain bandwidth where the first element is located, the CORESET group where the CORESET is located includes the CORESET where a downlink control channel scheduling the first element is located, and the search space of the CORESET associated detection in the time unit;

[0079] Obtain a quasi-co-site reference signal set of the first element according to a quasi-co-site reference signal set corresponding to a predetermined item codepoint in a TCI state mapping table, wherein the TCI state mapping table is a TCI state mapping table in the frequency domain bandwidth where the first element is located, or the TCI state mapping table is a TCI state mapping table corresponding to a CORESET group where a downlink control channel that schedules the first element is located.

[0080] In one embodiment, when the downlink control channel for scheduling the first element and the first element are in different frequency domain bandwidths,

[0081] In the case where CORESET is not configured in the frequency domain bandwidth where the first element is located, the communication node determines that the x quasi co-site reference signal sets of the first element belong to the quasi co-site reference signal set corresponding to the predetermined item codepoint in the TCI state mapping table;

[0082] When CORESET is configured in the frequency domain bandwidth where the first element is located, the communication node determines x quasi co-site reference signal sets of the first element according to the first information.

[0083] In one embodiment, the communication node determines the x quasi co-located reference signal sets of the first element according to the first information, including at least one of the following methods:

[0084] The communication node determines x quasi co-located reference signal sets according to the maximum number z of quasi co-located reference signal sets corresponding to a codepoint in the TCI state mapping table and / or the number d of CORESET groups in the frequency domain bandwidth where the first element is located;

[0085] When d is equal to 1 and z is equal to 1, the communication node determines x quasi co-located reference signal sets according to the quasi co-located reference signal set of the CORESET that satisfies the first predetermined characteristic;

[0086] When d is equal to 1 and z is greater than 1, the communication node determines x quasi-co-site reference signal sets according to one or more quasi-co-site reference signal sets corresponding to the predetermined item codepoint in the TCI state mapping table;

[0087] When d is greater than 1, the communication node determines x quasi co-located reference signal sets according to the quasi co-located reference signal set of the CORESET that satisfies the second predetermined characteristic;

[0088] The CORESET of the first predetermined feature includes a CORESET with a lowest CORESET index in a CORESET of a search space for association detection in a time unit closest to the first element, and the CORESET and the first element are located in a frequency domain bandwidth;

[0089] The CORESET of the second predetermined feature includes a search space of associated detection in a time unit closest to the first element and belonging to a predetermined CORESET group, a CORESET with a lowest CORESET index, and the CORESET and the first element are located in a frequency domain bandwidth.

[0090] In one embodiment, the first element satisfies at least one of the following characteristics:

[0091] Scheduling a downlink control channel of the first element and a downlink control channel of the first element in different frequency domain bandwidths;

[0092] When the first element includes a measurement reference signal, the time domain symbol where the first element is located does not include the second element;

[0093] When the first element includes a measurement reference signal, the configuration information of the first element includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0094] In the list of quasi co-location reference signal sets configured in the frequency domain bandwidth where the first element is located, at least one quasi co-location reference signal set includes a quasi co-location reference signal associated with a spatial reception parameter;

[0095] In the list of quasi-co-site reference signal sets activated in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter;

[0096] In the list of activated quasi-co-site reference signal sets corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter;

[0097] In the list of quasi-co-site reference signal sets of PDSCH activated in the frequency domain bandwidth where the first element is located, at least one quasi-co-site reference signal set includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0098] In the list of activated PDSCH quasi co-location reference signal sets corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi co-location reference signal set including a quasi co-location reference signal associated with a spatial reception parameter.

[0099] In one embodiment, the TCI state mapping table satisfies at least one of the following characteristics:

[0100] TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located;

[0101] The TCI state mapping table corresponding to the CORESET group where the downlink control channel of the first element is scheduled;

[0102] In a TCI state set formed by TCI states included in the TCI state mapping table, there is at least one TCI state, and the at least one TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter.

[0103] In one embodiment, the method further includes: the communication node determines the x quasi co-located reference signal sets of the first element according to any one of the following judgment results:

[0104] Determine whether a TCI state set included in a TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located includes a TCI state, where the TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0105] When the judgment result is no, the x quasi co-location reference signal sets of the first element are obtained according to the x quasi co-location reference signal sets indicated in the downlink control channel in the first element of the scheduling;

[0106] When the judgment result is yes, the x quasi-co-site reference signal sets of the first element cannot be obtained according to the x quasi-co-site reference signal sets indicated in the downlink control channel in the scheduling first element, or the x quasi-co-site reference signal sets indicated in the downlink control channel in the scheduling first element meet the predetermined conditions.

[0107] In one embodiment, the communication node acquires the number x of the quasi co-located reference signal set of the first element according to the information indicated in the downlink control channel for scheduling the first element, including at least one of the following methods:

[0108] When the first element is a channel, the communication node determines the number x of the quasi co-located reference signal set of the first element according to the transmission configuration indication TCI indication field in the downlink control channel of the first element;

[0109] When the first element is a measurement reference signal, the communication node determines the number x of the quasi-co-site reference signal set of the first element according to the first codepoint indicated in the TCI indication field obtained from the request field in the downlink control channel of the first element.

[0110] In one embodiment, the predetermined codepoint includes any one of the following codepoints:

[0111] The lowest codepoint among the codepoints with the largest number of corresponding quasi-co-site reference signal sets in the TCI state mapping table;

[0112] The lowest codepoint among the codepoints with the smallest number of corresponding quasi co-site reference signal sets in the TCI state mapping table;

[0113] The number of corresponding quasi co-location reference signal sets in the TCI state mapping table is the largest and the corresponding quasi co-location reference signal set includes the lowest codepoint among the codepoints of the quasi co-location reference signal set of the predetermined CORESET;

[0114] codepoint 0;

[0115] The codepoint indicated by the predetermined item codepoint and the codepoint indicated by the TCI indication field in the downlink control channel of the first scheduling element are two independent codepoints;

[0116] The predetermined item codepoint is not obtained according to the TCI indication field in the downlink control channel of the first scheduling element.

[0117] In one embodiment, it also includes: the communication node determines the transmission mode of the first element based on x, wherein the transmission mode includes a mapping relationship between x quasi-co-site reference signal sets of the first element and parameters of the first element, and the parameters of the first element include at least one of the following parameters: frequency domain resources, time domain resources, demodulation reference signal DMRS port, and repeated transmission opportunity.

[0118] In one embodiment, the CORESET group satisfies at least one of the following characteristics:

[0119] The CORESET of the CORESET group is located in the frequency domain bandwidth where the first element is located;

[0120] The CORESET group includes the CORESET where the downlink control channel of the first element is scheduled;

[0121] The CORESETs in the CORESET group are located in the frequency domain bandwidth of the first element of the schedule;

[0122] The number of CORESET groups is the number of CORESET groups in the frequency domain bandwidth where the first element is located;

[0123] The number of CORESET groups is the number of CORESET groups in the frequency domain bandwidth where the downlink control channel of the first element is scheduled.

[0124] Some exemplary embodiments are listed below to illustrate the Figure 1 The following exemplary embodiments may be performed individually or in combination with each other, and the embodiments of the present application do not impose any specific restrictions on this.

[0125] First Exemplary Embodiment

[0126] In this embodiment, the number x of TCI states of PDSCH is obtained according to the first code point indicated by the TCI indication field in PDCCH, and the TCI state index of PDSCH is obtained according to x TCI states among y TCI states corresponding to the second code point, where x and y are positive integers greater than or equal to 1, where y is greater than or equal to x. For example, x and y belong to {1, 2}.

[0127] Further, the time interval between the PDCCH and the PDSCH that schedules the PDSCH / AP-CSI-RS (ie, the first element) is less than a first predetermined threshold.

[0128] Furthermore, the bandwidth part (Bandwidth part, BWP) where the PDCCH is located includes a CORESET group. For example, no CORESETPoolIndex is configured in any CORESET in a BWP, and the default CORESETPoolIndex is 0, or the CORESETPoolIndex value of all CORESETs in a BWP is the same.

[0129] Furthermore, the maximum value of the number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to PDSCH is z, where z is a positive integer greater than or equal to 1, and the TCI state mapping table corresponding to PDSCH includes the TCI state mapping table corresponding to the BWP / serving cell / serving cell list where PDSCH is located, or includes the TCI state mapping table corresponding to the CORESET group where the PDCCH that schedules PDSCH is located. Optionally, when the serving cells where the scheduling PDCCH and PDSCH are located are the same, the z value is greater than 1; when the serving cells where the scheduling PDCCH and PDSCH are located are different, the z value is greater than or equal to 1.

[0130] Furthermore, the second codepoint is the lowest codepoint in the codepoint set whose corresponding TCIstate number is equal to z in the TCI state mapping table corresponding to the above PDSCH, where y is equal to the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table, that is, y is equal to z.

[0131] Furthermore, the above method for determining the TCI state is suitable for both the case where the serving cells (also referred to as carriers) where the PDCCH and PDSCH are located are the same and the case where the serving cells where the PDCCH and PDSCH are located are different.

[0132] Specifically, a TCI state mapping table is configured for a BWP / serving cell / serving cell list / CORESET group through a Media Access Control Control Element (MAC CE), as shown in Table 1. The TCI state mapping table may also be referred to as a TCI state mapping relationship, which is the correspondence between the codepoint value in the TCI indication field in the downlink control information (DCI) and the TCIstate. The TCI indication field in the DCI is used to indicate the TCI state information of the PDSCH. When the time interval between PDCCH and PDSCH is less than the first predetermined threshold, the TCI state of PDSCH belongs to the TCI state {TCI state3, TCI state5} corresponding to the codepoint value of 001 (i.e., the second codepoint, i.e., the lowest codepoint in the codepoint {001, 101, 111} corresponding to the number of TCI states of 2 in Table 1), but the number x of TCI states of PDSCH is obtained according to the codepoint indicated by the TCI indication field of the PDCCH that schedules the PDSCH (i.e., the first codepoint), for example, if the codepoint indicated by the TCI indication field of the PDCCH that schedules the PDSCH indicates 000, then x=1; if the codepoint indicated by the TCI indication field of the PDCCH that schedules the PDSCH indicates 101, then x=2.

[0133] Table 1 TCI state mapping table

[0134] codepoint TCI state 000 TCI state1 001 TCI state3, TCI state5 010 TCI state3 011 TCI state5 100 TCI state4 101 TCI state 1, TCI state 16 110 TCI state28 111 TCI state 2,TCI state 8

[0135] When x is less than y, it is necessary to determine which x TCI states among the y TCI states corresponding to the second codepoint are used to determine the TCI state of the PDSCH. This can be determined in one or more of the following ways:

[0136] Method 1: Obtain x TCI states of PDSCH according to the first x TCI states among y TCI states. For example, if x=1, y=2, it is always obtained according to the first TCI state, that is, the TCI state of PDSCH is obtained according to the first TCI state: TCI state3 in {TCI state3, TCI state5}. For example, TCI state3 is used as the TCIstate of PDSCH, or TCI state3 is included in the acquisition parameters of the TCI state of PDSCH.

[0137] Method 2: Select x TCIstates from y TCIstates according to the TCI state corresponding to the first codepoint, for example, determine the TCI state according to the intersection of the TCI state corresponding to the first codepoint and the TCI state corresponding to the second codepoint, for example, if the first codepoint indicates 010, the TCI state of PDSCH is TCI state3; if the first codepoint indicates 011, the TCI state of PDSCH is TCI state5. That is, when the TCI state corresponding to the first codepoint belongs to the TCI state corresponding to the second codepoint, the TCI state of PDSCH is obtained according to the TCIstate corresponding to the first codepoint, and further, the intersection between the TCI state corresponding to the first codepoint and the TCI state corresponding to the second codepoint can be limited to be non-empty, and the number of TCI states included in the intersection can be limited to x.

[0138] Or, according to the intersection of the quasi-co-site reference signal set of the associated spatial reception parameters in the TCI state corresponding to the first codepoint and the quasi-co-site reference signal set of the associated spatial reception parameters in the TCI state corresponding to the second codepoint, x TCI states are determined in y TCI states as the TCIstate for the PDSCH with a scheduling interval less than the first predetermined threshold. For example, the first codepoint indicates 100, corresponding to TCI state4, and the quasi-co-site reference signal sets corresponding to each TCI state are shown in Table 2. At this time, the quasi-co-site reference signal of the associated spatial reception parameters of TCI state4 is SSB3, and only the quasi-co-site reference signal of the associated spatial reception parameters of TCI state3 in TCIstate 3 and TCI state 5 is SSB3, so the TCI state of the PDSCH with a scheduling interval less than the first predetermined threshold is TCI state3.

[0139] Table 2

[0140]

[0141] Or when there is no intersection, it is determined according to the TCI state closest to the TCI state index corresponding to the first codepoint among the y TCI states. For example, if the first codepoint indicates 000, the TCI state of PDSCH is TCIstate3, because the index closest to TCI state1 in {TCI state3, TCI state5} is TCI state3, the first codepoint indicates 100, and the absolute value of the difference between {TCI state3, TCI state5} corresponding to the second codepoint and the TCI state index corresponding to the first codepoint is the same, both 1, then PDSCH is obtained according to the lowest TCI state, such as TCI state3.

[0142] Method three: The number of TCI states and TCI state indexes of PDSCH are obtained based on the first codepoint, but the TCI state corresponding to the first codepoint is limited to the TCI state corresponding to the second codepoint. Or the set of quasi-co-site reference signals of the associated spatial reception parameters in the TCI state corresponding to the first codepoint is limited to the set of quasi-co-site reference signals of the associated spatial reception parameters of the TCI state corresponding to the second codepoint, as shown in Table 2. The quasi-co-site reference signal of the TCI state-associated spatial reception parameters indicated in the PDCCH corresponding to the PDSCH with a scheduling interval less than the first predetermined threshold needs to belong to {SSB3, SSB16}, or the quasi-co-site reference signal of the associated spatial reception parameters in the TCI state corresponding to the first codepoint and at least one quasi-co-site reference signal of the associated spatial reception parameters of the TCI state corresponding to the second codepoint satisfy a quasi-co-site relationship.

[0143] The above mapping table is a mapping table between the codepoint of the TCI indication field in the PDCCH and the TCI state. The embodiment of the present application also does not exclude that the number of codepoints in the mapping table is 1, as shown in Table 3.

[0144] Table 3 TCI state mapping table

[0145] codepoint TCI state 000 TCI state1

[0146] In the embodiment of the present application, acquiring the second information according to the first information includes one of the following: the acquisition parameters of the second information include the first information; the second information is the first information.

[0147] In an embodiment of the present application, a quasi co-located reference signal set corresponds to a TCI state, or a quasi co-located reference signal set includes one or more quasi co-located reference signals, and the intersection of channel large-scale parameter sets corresponding to different quasi co-located references is empty. When the quasi co-located reference signal is not described by the TCI state, the TCI state in the above description of the present application can be replaced by the quasi co-located reference signal set.

[0148] In summary, the number of TCI states of PDSCH and the TCI state of PDSCH (i.e., TCI state index) are obtained through different signaling information, or are obtained according to different codepoints respectively. The number of PDSCH is obtained through the first codepoint, and the TCI state index is obtained according to the second codepoint, wherein the first codepoint is included in the PDCCH signaling for scheduling PDSCH and the second codepoint is a predetermined codepoint in the TCI state mapping table, for example, the second codepoint is the lowest codepoint in the TCI state mapping table, i.e., codepoint 000; or the second codepoint is the lowest codepoint among the codepoints in the TCI state mapping table whose corresponding number of TCI states is equal to z.

[0149] The TCI state of the PDSCH above indicates that a quasi-co-location relationship is satisfied between a demodulation reference signal (DMRS) of the PDSCH and a reference signal in the TCI state, wherein the reference signal includes a downlink synchronization signal.

[0150] Similarly, the number of quasi-co-site reference signal sets of PDSCH with a scheduling interval less than the first predetermined threshold is indicated by the information contained in the PDCCH that schedules the PDSCH, such as the TCI indication field. However, the quasi-co-site reference signal set of PDSCH is obtained through the quasi-co-site reference signal set of the second channel or the second signal, wherein the second signal includes at least one of the following signals: periodic CSI-RS, semi-persistent CSI-RS, AP-CSI-RS with a scheduling interval greater than or equal to the second predetermined threshold; the second channel includes at least one of the following: PDSCH with a scheduling interval greater than or equal to the first predetermined threshold, semi-persistent PDSCH with a scheduling interval greater than or equal to the first predetermined threshold, wherein the scheduling interval is calculated separately in each transmission opportunity of the semi-persistent PDSCH, CORESET. The time domain intersection between the second channel or the second signal and the PDSCH with a scheduling interval less than the first predetermined threshold is non-empty. Optionally, the second channel or the second signal and the PDSCH with a scheduling interval less than the first predetermined threshold are in the same serving cell.

[0151] Specifically, Figure 2 A schematic diagram of time domain resources occupied by a first element and a second element provided by an embodiment is shown, such as Figure 2As shown, DCI 1 schedules PDSCH 1, DCI 2 schedules PDSCH 2, the time interval between DCI 1 and PDSCH 1 is less than the first predetermined threshold, and the time interval between DCI 2 and PDSCH 2 is greater than the first predetermined threshold. When there is overlap in the time domain between PDSCH 1 and PDSCH 2, the quasi co-located reference signal set of PDSCH 1 needs to be acquired according to the quasi co-located reference signal set of PDSCH 2, but the number of quasi co-located reference signal sets of PDSCH 2 is 2, and whether the number of quasi co-located reference signal sets of PDSCH 1 is 1 or 2 is acquired through information indicated in DCI 1. When the number of quasi co-located reference signal sets of PDSCH 1 is less than or equal to the number of quasi co-located reference signal sets of PDSCH 2, the quasi co-located reference signal set of PDSCH 1 can be determined from the two quasi co-located reference signal sets of PDSCH 2 by using the methods in the first exemplary embodiment from the first method to the third method.

[0152] Or the quasi-co-site reference signal set of PDSCH 1 is obtained through the TCI indication field in DCI 1, but the quasi-co-site reference signal set indicated in DCI 1 belongs to the quasi-co-site reference signal set of PDSCH 2, or the quasi-co-site reference signal set indicated in DCI 1 and the quasi-co-site reference signal set of PDSCH 2 satisfy a quasi-co-site relationship, or the quasi-co-site reference signal set of associated spatial reception parameters indicated in DCI 1 and the quasi-co-site reference signal set of associated reception parameters of PDSCH 2 satisfy a quasi-co-site relationship.

[0153] The above-mentioned second channel PDSCH only includes PDSCH 2. Of course, the embodiment of the present application does not exclude the situation where the second channel includes multiple PDSCHs. Figure 3 A schematic diagram of time domain resources occupied by a first element and a plurality of second elements provided by an embodiment is shown, such as Figure 3As shown, the second channel includes PDSCH 2 and PDSCH 3, DCI 3 schedules PDSCH 3, and the scheduling interval between PDSCH 2 and PDSCH 3 is greater than the first predetermined threshold. When the second channel includes multiple channels, how to determine the TCIstate of PDSCH 1. One way is: obtain the quasi-co-site reference signal information of PDSCH 1 according to the quasi-co-site reference signal set of PDSCH that is the same as the group information of PDSCH 1. Optionally, the group information corresponding to PDSCH 2 is the same as the group information corresponding to PDSCH 1, such as the CORESET group where DCI 1 is located and the CORESET group where DCI 2 is located are the same, then the quasi-co-site reference signal set of PDSCH 1 is obtained according to the quasi-co-site reference signal set of PDSCH 2. The above group information can also be other group information, such as assigning a group information to each channel or signal, or it can be receiving antenna group information. Another method is: the quasi-co-located reference signal sets of PDSCH 2 and PDSCH 3 together constitute y quasi-co-located reference signal sets, and x quasi-co-located reference signal sets are determined from the y quasi-co-located reference signal sets according to the above method, and further, the order of the quasi-co-located reference signal sets of PDSCH 2 and PDSCH 3 in the y quasi-co-located reference signal sets is determined according to the group information.

[0154] Second Exemplary Embodiment

[0155] In this embodiment, c (i.e., x in the above embodiment) TCI states of AP-CSI-RS are obtained according to y TCI states corresponding to the second codepoint (i.e., the predetermined codepoint) in the TCI state mapping table, where c is a positive integer less than or equal to y, and y is a positive integer greater than or equal to 1. The second codepoint is a codepoint in the TCI state mapping table that meets a predetermined feature, such as the second codepoint is the lowest codepoint among the codepoints with the largest number of corresponding TCI states in the TCI state mapping table, or the second codepoint is codepoint 00 in the TCI state mapping table.

[0156] Furthermore, the TCI state mapping table is a TCI state mapping table of the PDSCH in the BWP / serving cell / servingcell where the AP-CSI-RS is located, or a TCI state mapping table corresponding to the PDSCH of the CORESET group where the PDCCH that schedules the AP-CSI-RS is located.

[0157] Further, the time interval between the PDCCH for scheduling the AP-CSI-RS and the AP-CSI-RS is less than a second predetermined threshold.

[0158] Furthermore, the BWP where the PDCCH is located includes a CORESET group. For example, the default CORESETPoolIndex is 0, that is, no CORESETPoolIndex is configured in the CORESET in a BWP, and the default CORESETPoolIndex is 0; or the CORESETPoolIndex values ​​of all CORESETs in a BWP are the same.

[0159] Furthermore, the maximum value of the number of TCI states corresponding to a codepoint in the TCI state mapping table is z, where z is a positive integer greater than or equal to 1. Optionally, when the serving cell where the scheduling PDCCH and AP-CSI-RS are located is the same, the z value is greater than 1; when the serving cells where the scheduling PDCCH and AP-CSI-RS are located are different and there is no CORESET configured in the serving cell where the AP-CSI-RS is located, the z value is greater than or equal to 1. Or regardless of whether the PDCCH and AP-CSI-RS are in the same serving cell or in different serving cells, as long as there is no CORESET in the serving cell where the AP-CSI-RS is located, the z value is greater than or equal to 1; when there is a CORESET in the serving cell where the AP-CSI-RS is located, the z value is greater than 1.

[0160] Furthermore, the above method for determining the TCI state is suitable for the case where the serving cell (also referred to as carrier) where the PDCCH and AP-CSI-RS are located is the same, and is also suitable for the case where the serving cells where the PDCCH and AP-CSI-RS are located are different.

[0161] Further, when c is less than or equal to y, c TCI states of the AP-CSI-RS are determined from y TCIstates according to signaling information and / or a predetermined rule. Specifically, the c TCI states may be determined by one or more of the following methods.

[0162] Method 1: According to the index configured in the AP-CSI-RS resource, the index indicates which TCI state of the AP-CSI-RS is obtained from among the y TCI states. For example, the index indicates the relative index of the TCI state of the AP-CSI-RS among the y TCI states.

[0163] Method 2: Determine c TCI states according to the intersection of the TCI state configured for AP-CSI-RS resources by radio resource control (RRC) or MAC-CE command and y TCI states, or the absolute value of the index difference between the c TCI states and the TCI state index configured for AP-CSI-RS resources by RRC or MAC-CE command is the smallest.

[0164] Method three: Obtain the TCI state of AP-CSI-RS according to the TCI state configured for AP-CSI-RS resources according to the RRC or MAC-CE command, and further limit the TCI state configured for AP-CSI-RS by RRC or MAC-CE to belong to the y TCIstates corresponding to the second codepoint when the time interval between PDCCH and AP-CSI-RS is less than the second predetermined threshold.

[0165] Method 4: The first c TCI states among the y TCI states are the TCI states of the AP-CSI-RS.

[0166] Further, there is no second channel or second signal on the time domain symbol where the above AP-CSI-RS is located or on the time domain symbol where the AP-CSI-RS whose TCI state is determined according to the above method is located, wherein the second signal includes at least one of the following signals: periodic CSI-RS, semi-persistent CSI-RS, AP-CSI-RS with a scheduling interval greater than a second predetermined threshold; the second channel includes at least one of the following: PDSCH with a scheduling interval greater than a first predetermined threshold, semi-persistent PDSCH with a scheduling interval greater than a second predetermined threshold, wherein the scheduling interval in each transmission opportunity of the semi-persistent PDSCH is calculated separately, CORESET. Further, the second channel or the second signal and the AP-CSI-RS are in the same serving cell.

[0167] Similarly, when there is a second channel PDSCH on the time domain symbol where the AP-CSI-RS is located, the quasi-co-site reference signal set of the AP-CSI-RS with a scheduling interval less than the second predetermined threshold can be determined from the y quasi-co-site reference signal sets corresponding to the second channel PDSCH by one or more of methods one to four in the second exemplary embodiment. Figure 4 A schematic diagram showing another time domain resource occupied by a first element and a second element provided by an embodiment is shown, such as Figure 4 As shown, DCI 1 schedules channel state information reference signal (CSI-RS) 1, DCI 2 schedules PDSCH 2, the time interval between DCI 1 and CSI-RS 1 is less than a first predetermined threshold, and the time interval between DCI 2 and PDSCH 2 is greater than the first predetermined threshold. When there is overlap in the time domain between CSI-RS 1 and PDSCH 2, the quasi-co-site reference signal set of CSI-RS 1 needs to be obtained based on the quasi-co-site reference signal set of PDSCH 2, but the number of quasi-co-site reference signal sets of PDSCH 2 is 2, and the number of quasi-co-site reference signal sets of CSI-RS 1 is fixed to 1. The quasi-co-site reference signal set of CSI-RS 1 can be determined from the two quasi-co-site reference signal sets of PDSCH 2 by one or more of the above-mentioned methods 1 to 4.

[0168] Or the quasi-co-site reference signal set of CSI-RS 1 is obtained through the information indicated in DCI 1, except that the quasi-co-site reference signal set indicated in DCI 1 belongs to the quasi-co-site reference signal set of PDSCH 2; or the quasi-co-site reference signal set indicated in DCI 1 and the quasi-co-site reference signal set of PDSCH 2 satisfy a quasi-co-site relationship; or the quasi-co-site reference signal set of associated spatial reception parameters indicated in DCI 1 and the quasi-co-site reference signal set of associated reception parameters of PDSCH 2 satisfy a quasi-co-site relationship. The quasi-co-site reference signal set of CSI-RS 1 is obtained through the information indicated in DCI 1, including one or more CSI-RS resource sets configured by the high layer corresponding to a value of the CSI request field in DCI 1. The high layer signaling configures a quasi-co-site reference signal set for each CSI-RS resource in each CSI-RS resource set. It can be seen that when the high layer signaling configures the quasi-co-site reference signal set for CSI-RS 1 whose scheduling interval is less than the second predetermined threshold, the above predetermined condition needs to be considered.

[0169] Third Exemplary Embodiment

[0170] In this embodiment, the number x of quasi-co-site reference signal sets (or TCI states) of PDSCH / CSI-RS is determined according to signaling information or a predetermined rule, specifically including determining x according to at least one of the following methods. The following description takes the determination of the number of TCI states as an example, and the number of quasi-co-site reference signal sets may also be determined by the following method, for example, when the base station does not configure the TCI state for PDSCH / AP-CSI-RS, the quasi-co-site reference signal set of PDSCH / AP-CSI-RS may also be obtained in the following manner.

[0171] Method 1: Determine x based on the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table.

[0172] Method 2: Determine x based on the number of CORESET groups: When the number of CORESET groups is equal to 1, determine that x is less than or equal to 2 or x is less than or equal to the maximum number of TCI states corresponding to a codpoint in the TCI state mapping table; when the number of CORESET groups is greater than 1, determine that x is 1.

[0173] Method 3: Determine x based on the number of TCI state mapping tables corresponding to a BWP: When the number of TCI state mapping tables is 1, determine x to be 2 or determine y to be the maximum number of TCIstates corresponding to a codepoint in the TCI state mapping table; when the number of TCI state mapping tables is greater than 1, determine x to be 1.

[0174] Method 4: Obtain x according to the number of TCI states in the codepoint indicated by the TCI field in the PDCCH that schedules the PDSCH.

[0175] Method 5: Determine the number of TCI states according to the scheduling interval of PDSCH. When the scheduling interval of PDSCH is less than the first predetermined threshold, the number of TCI states of PDSCH is fixed to 2.

[0176] Method 6: Determine x based on the number of CORESET groups and the maximum number of TCIstates z corresponding to a codepoint in the TCI state mapping table. Specifically, when the number of CORESET groups is equal to 2, x is equal to 1; when the number of CORESET groups is equal to 1 and the z value is equal to 1, x is equal to 1; when the number of CORESET groups is equal to 1 and the z value is greater than 1, x is equal to 2.

[0177] Method 7: x is determined based on the number of CORESET groups, the maximum number of TCIstates z corresponding to a codepoint in the TCI state mapping table, and the information indicated in the PDCCH for scheduling PDSCH / AP-CSI-RS. Specifically, when the number of CORESET groups is equal to 2, x is equal to 1; when the number of CORESET groups is equal to 1 and the z value is equal to 1, x is equal to 1; when the number of CORESET groups is equal to 1 and the z value is greater than 1, x is determined based on the information indicated in the PDCCH for scheduling PDSCH / AP-CSI-RS.

[0178] Furthermore, the scheduling interval of the above-mentioned PDSCH / AP-CSI-RS is less than the first predetermined threshold, or the PDCCH that schedules the PDSCH / AP-CSI-RS does not include TCI state indication information and the scheduling interval of the above-mentioned PDSCH is greater than or equal to the first predetermined threshold.

[0179] Furthermore, when PDSCH is repeatedly transmitted in the time domain, and in multiple time domain repeated transmission opportunities of PDSCH, the time interval between the starting time domain symbol of some repeated transmission opportunities and the PDCCH that schedules PDSCH is less than the first predetermined threshold, and the time interval between the starting time domain symbol of some repeated transmission opportunities and the PDCCH that schedules PDSCH is greater than or equal to the first predetermined threshold, then x can be further obtained according to the number of TCI states indicated in the PDCCH and at least one of the above-mentioned methods 1 to 7. Furthermore, the above-mentioned TCI state number x of PDSCH / AP-CSI-RS is the number of TCI states corresponding to PDSCH in one time domain symbol, and the total number of TCI states corresponding to PDSCH on different time domain resources is greater than or equal to x. Or the TCI state number x of PDSCH is the total number of TCI states corresponding to PDSCH, including the corresponding TCI states of PDSCH on different time domain resources.

[0180] Further, the communication node can determine the transmission mode of PDSCH according to the value of x. The transmission mode is a mapping relationship between x TCIstates and d resources, where the resources include at least one of the following: frequency domain resource group, time domain resource group, DMRS port group. Specifically, the following method is adopted:

[0181] When x=1 and the high-level signaling notifies the base station that the transmission mode is one of 'FDMSchemeA', 'FDMSchemeB', and 'TDMSchemeA', the terminal uses this TCI state in all time domain transmission opportunities on all frequency domain resources occupied by PDSCH and the terminal has only one retransmission opportunity for PDSCH;

[0182] When x=2 and the high-level transmission mode is one of 'FDMSchemeA' and 'FDMSchemeB', different frequency domain resource groups of PDSCH correspond to different TCI states among the x TCI states, such as Figure 5 As shown;

[0183] When x=2 and the transmission mode notified by the higher layer is 'TDMSchemeA', different repeated transmission opportunities in a time slot correspond to different TCI states among the x TCI states, such as Figure 6 As shown;

[0184] When x=1 and at least one of the time domain parameters in the time domain parameter list configured by the higher layer includes the number of repeated transmissions between slots, and the time domain parameter item indicated by the PDCCH that schedules the PDSCH includes the number of repeated transmissions between slots, the PDSCH is repeatedly transmitted between different slots, and the same TCI state is used between the slots of repeated transmission;

[0185] When x=2 and at least one of the time domain parameters in the time domain parameter list configured by the higher layer includes the number of repeated transmissions between slots and the time domain parameter item indicated by the PDCCH scheduling PDSCH includes the number of repeated transmissions between slots, the TCI state changes once every 2 repeated transmission opportunities, such as Figure 7 As shown, or the TCI state changes once for each repeated transmission, such as Figure 8 As shown;

[0186] When x=1, the time domain parameter item indicated by the PDCCH scheduling PDSCH does not include the number of repeated transmissions between slots, and the DMRS ports in all code division multiplexing (CDM) groups of PDSCH correspond to the same TCI state;

[0187] When x=2, the time domain parameter item indicated by the PDCCH scheduling PDSCH does not include the number of repeated transmissions between slots. The DMRS ports in different CDM groups of the PDSCH correspond to different TCI states in the x TCI states, such as Fig. 9 shown.

[0188] Further, the x TCI states may be acquired according to the method described in the first exemplary embodiment or the second exemplary embodiment, or may be acquired according to the method described in the third exemplary embodiment.

[0189] Furthermore, when PDSCH is repeatedly transmitted in the time domain, and in multiple time domain repeated transmission opportunities of PDSCH, the time interval between the starting time domain symbol of some repeated transmission opportunities and the PDCCH that schedules PDSCH is less than the first predetermined threshold, and the time interval between the starting time domain symbol of some repeated transmission opportunities and the PDCCH that schedules PDSCH is greater than or equal to the first predetermined threshold, then x can be further obtained according to the number of TCI states indicated in the PDCCH and at least one of the above methods 1 to 7, that is, at this time, the x TCI states obtained according to the above method correspond to all time domain repeated transmission opportunities of PDSCH, for example, the time domain repeated transmission opportunity of PDSCH is 8, such as Figure 10-11 As shown, the scheduling interval in the first two repetition transmission opportunities is less than the first predetermined threshold, and the scheduling interval in the first six repetition transmission opportunities is greater than the first predetermined threshold. The default number of TCIstates is 2, for example, the TCI state of the lowest codepoint in the codepoint with a corresponding TCI state number of 2 in the TCI state mapping table, and it is determined that x=2, for example, the two TCI states are {TCI state0, TCIstate1}, then the two TCI states are changed every two repetition transmission opportunities in 8 repetition transmission opportunities. Fig.10 As shown, or the two TCI states are changed every other transmission opportunity in 8 repetition transmission opportunities. Fig.11As shown. Or at this time, the x value obtained according to the above-mentioned method 1 to method 7 is only applicable to the transmission opportunities with a scheduling interval less than the first predetermined threshold, and the transmission mode of this part of the transmission opportunities is determined according to the x value, and the x value corresponding to the transmission opportunity with a scheduling interval greater than or equal to the second predetermined threshold is obtained according to the TCI state indicated by the TCI field in the PDCCH that schedules the PDSCH, and the transmission mode of this part of the transmission opportunities is determined according to the x value. Specifically, the PDSCH includes 8 transmission opportunities in the time domain, respectively in different slots, and the scheduling interval of the transmission opportunities in the first 2 slots is less than the first predetermined threshold. According to at least one of the methods 1 to 7, x=1 is obtained, and the transmission opportunities in the first 2 slots all use this 1 TCI state, such as the TCI state obtained in any of the first exemplary embodiment to the third exemplary embodiment, and the scheduling interval of the transmission opportunities in the last 6 slots is greater than or equal to the first predetermined threshold. The number of TCI states indicated in the PDCCH is 2, and the TCI states of the transmission opportunities in the last 6 slots are obtained according to the 2 TCI states indicated in the PDCCH. Specifically, for example, when the TCI state of the PDSCH is less than the first predetermined threshold, the TCI state of the PDSCH is TCI 0 obtained by the method in the first exemplary embodiment to the third exemplary embodiment, and the TCI state indicated in the PDCCH for scheduling the PDSCH is {TCI 3, TCI 4}. When the transmission opportunity is repeated every 2 of the 6 transmission opportunities, the TCI state changes once, as shown in FIG. Fig.12 As shown; or the TCI state changes once for each repeated transmission opportunity in 6 transmission opportunities, as shown Fig.13 As shown. Figure 12-13For transmission opportunities 1 to 2 whose scheduling interval is less than the first predetermined threshold, x=1 corresponds to the TCI state of TCI 0, and for transmission opportunities 3 to 8 whose scheduling interval is greater than or equal to the first predetermined threshold, x=2 corresponds to the TCI state of {TCI 3, TCI 4} indicated in the PDCCH for scheduling the PDSCH. In an embodiment of the present application, a quasi-co-site reference signal set includes one or two reference signals, and each reference signal is associated with a quasi-co-site parameter, as shown in Table 4. One TCI state corresponds to a quasi-co-site reference signal set {CSI-RS1, SSB3}, where the large-scale parameters associated with CSI-RS1 include {Doppler shift, Doppler spread, average delay, delay spread}, and the parameters associated with SSB3 are spatial reception parameters. For example, if the base station configures the TCI state of DMRS 1 to be TCIstaten, then DMRS 1 and CSI-RS 1 satisfy a quasi-co-site relationship with respect to {Doppler shift, Doppler spread, average delay, delay spread}, and DMRS 1 and SSB3 satisfy a quasi-co-site relationship with respect to spatial reception parameters.

[0190] Table 4

[0191]

[0192] Fourth Exemplary Embodiment

[0193] In this embodiment, a determination method of a quasi co-located reference signal set of a PDSCH / AP-CSI-RS is determined according to signaling information and / or a predetermined rule, wherein the determination method of a quasi co-located reference signal set includes the following three methods:

[0194] Method 1: In the serving cell where the PDSCH / AP-CSI-RS is located, the quasi-co-site reference signal set of the PDSCH / AP-CSI-RS is obtained according to the quasi-co-site reference signal set of the CORESET with the lowest CORESET-ID in the CORESET of the associated detection search space in the slot closest to the PDSCH / AP-CSI-RS.

[0195] Method 2: Acquire the quasi-co-site reference signal of PDSCH / AP-CSI-RS according to the quasi-co-site reference signal of the CORESET with the lowest CORESET-ID in the time unit closest to the PDSCH / AP-CSI-RS in the time unit of the CORESET containing the predetermined characteristics. The CORESET with the predetermined characteristics includes: the CORESET is in the serving cell where the PDSCH / AP-CSI-RS is located, the CORESET group where the CORESET is located includes the CORESET where the PDCCH scheduling the PDSCH / AP-CSI-RS is located, and the search space of the CORESET associated detection in the time unit.

[0196] Method 3: Obtain the TCI state of PDSCH / AP-CSI-RS according to the TCI state corresponding to the predetermined item codepoint in the TCI state mapping table corresponding to PDSCH / AP-CSI-RS. For example, the predetermined item codepoint includes one of the following: the lowest codepoint among the codepoints whose number of corresponding TCI states is equal to z; the lowest codepoint 0; the lowest codepoint among the codepoints including the predetermined TCI state, where z is the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table.

[0197] Furthermore, the above-mentioned PDSCH satisfies at least one of the following characteristics: the scheduling interval of the PDSCH is less than the first predetermined threshold; and the PDCCH that schedules the PDSCH does not include TCI indication information of the PDSCH.

[0198] Furthermore, the scheduling interval of the AP-CSI-RS is smaller than a second predetermined threshold.

[0199] Furthermore, a method for acquiring a quasi-co-site reference signal set for PDSCH / AP-CSI-RS is determined based on the first information, wherein the first information includes at least one of the following: the number of CORESET groups, the maximum number z corresponding to a codepoint in the TCIstate mapping table corresponding to PDSCH / AP-CSI-RS, the number of sets of values ​​of the same type of parameters of PDSCH, whether the PDCCH and PDCCH scheduling AP-CSI-RS are in the same component carrier (component carrier, CC), and whether CORESET is configured in the frequency domain bandwidth where the AP-CSI-RS is located.

[0200] Specifically, when there is only one CORESET group in the BWP where the PDCCH that schedules PDSCH / AP-CSI-RS is located and z is equal to 1, the quasi-co-site reference signal set of PDSCH / AP-CSI-RS is determined according to method one; when there is only one CORESET group in the BWP where the PDCCH that schedules PDSCH / AP-CSI-RS is located and z is equal to 2, the quasi-co-site reference signal set of PDSCH / AP-CSI-RS is determined according to method three; when there are 2 CORESET groups in the BWP where the PDCCH that schedules PDSCH / AP-CSI-RS is located, the quasi-co-site reference signal set of PDSCH / AP-CSI-RS is determined according to method two.

[0201] When the PDCCH and AP-CSI-RS that schedule the AP-CSI-RS are in different CCs, first determine whether to use the above method three or one of {method one, method two, method three} according to whether CORESET is configured in the serving cell / BWP where the AP-CSI-RS is located. When CORESET is not configured, use method three, otherwise use one of {method one, method two, method three}. For example, when there is only one CORESET group in the BWP where the PDCCH that schedules the AP-CSI-RS is located and z is equal to 1, the quasi-co-site reference signal set of the AP-CSI-RS is determined according to method one; when there is only one CORESET group in the BWP where the PDCCH that schedules the AP-CSI-RS is located and z is equal to 2, the quasi-co-site reference signal set of the AP-CSI-RS is determined according to method three; when there are 2 CORESET groups in the BWP where the PDCCH that schedules the AP-CSI-RS is located, the quasi-co-site reference signal set of the AP-CSI-RS is determined according to method two.

[0202] Or first determine whether to use the above method three or one of {method one, method two, method three} according to whether CORESET is configured in the serving cell / BWP where the AP-CSI-RS is located. When CORESET is not configured, use method three, otherwise use one of {method one, method two, method three}. For example, when there is only one CORESET group in the BWP where the PDCCH scheduling AP-CSI-RS is located and z is equal to 1, the quasi-co-site reference signal set of AP-CSI-RS is determined according to method one; when there is only one CORESET group in the BWP where the PDCCH scheduling AP-CSI-RS is located and z is equal to 2, the quasi-co-site reference signal set of AP-CSI-RS is determined according to method three; when there are 2 CORESET groups in the BWP where the PDCCH scheduling AP-CSI-RS is located, the quasi-co-site reference signal set of PDSCH / AP-CSI-RS is determined according to method two.

[0203] In the embodiment of the present application, the serving cell is a CC, or the serving cell includes carrier components (carrier cozponents) corresponding to different subcarrier spacings in a serving cell.

[0204] The number of CORESET groups in the above first information can also be replaced by the number of sets of values ​​of the same type of parameters of PDSCH in the BWP where PDSCH / AP-CSI-RS is located, for example, the same parameter includes at least one of the following: the scrambling sequence of PDSCH, the number of sets of rate matching information of PDSCH, where PDSCH scheduled by different CORESET groups is obtained using different values ​​of the same type of parameters, and a set of values ​​may include one or more values.

[0205] Furthermore, there is no second channel or signal on the time domain symbol where the above-mentioned AP-CSI-RS is located, or there is no second channel or second signal on the time domain symbol where the AP-CSI-RS of the quasi-co-site reference signal is located according to one of the above-mentioned three methods. The second signal includes at least one of the following signals: periodic CSI-RS, semi-persistent CSI-RS, AP-CSI-RS with a scheduling interval greater than a second predetermined threshold; the second channel includes at least one of the following: PDSCH with a scheduling interval greater than a first predetermined threshold, semi-persistent PDSCH with a scheduling interval greater than the first predetermined threshold, wherein the scheduling interval in each transmission opportunity of the semi-persistent PDSCH is calculated separately, CORESET. Furthermore, the second channel or the second signal and the AP-CSI-RS are in the same serving cell.

[0206] Fifth exemplary embodiment

[0207] In this embodiment, when the PDCCH and PDSCH that schedule the PDSCH are in different CCs and the time interval between the PDCCH and PDSCH that schedule the PDSCH is less than the first predetermined threshold, the TCI state of the PDSCH is obtained according to the TCI state corresponding to the predetermined item codepoint in the TCI state mapping table corresponding to the PDSCH. The predetermined item codepoint includes one of the following: the lowest codepoint 0, the lowest codepoint among the codepoints whose corresponding TCI state number is z, the lowest codepoint among the codepoints whose corresponding TCI state number is d, the lowest codepoint among the codepoints whose corresponding quasi-co-site reference signal set in the TCI state mapping table has the largest number and the corresponding quasi-co-site reference signal set includes the lowest codepoint among the codepoints of the quasi-co-site reference signal set of the predetermined CORESET. Among them, z is the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to the PDSCH, and d is the minimum number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to the PDSCH.

[0208] The TCI state mapping table corresponding to PDSCH includes one of the following: the TCI state mapping table corresponding to the PDSCH of the BWP / servingcell / serving cell list where the PDSCH is located; the TCI state mapping table corresponding to the CORESET group where the PDCCH that schedules the PDSCH is located, wherein the TCI state of the PDSCH scheduled by the CORESET group belongs to an item in the TCIstate mapping table.

[0209] Sixth Exemplary Embodiment

[0210] In this embodiment, the TCI state of the AP-CSI-RS is obtained according to c TCI states in the TCI state corresponding to the predetermined item codepoint in the TCI state mapping table, wherein the codepoint includes one of the following: the lowest codepoint 0, the lowest codepoint in the codepoint whose corresponding TCI state number is z, the lowest codepoint in the codepoint whose corresponding TCIstate number is d, and the lowest codepoint in the codepoint of the quasi-co-site reference signal set corresponding to the maximum number of quasi-co-site reference signal sets in the TCI state mapping table and the corresponding quasi-co-site reference signal set includes the predetermined CORESET. Among them, z is the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to PDSCH, and d is the minimum number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to PDSCH. Further, the predetermined item codepoint is which of the above three codepints is obtained according to signaling information or predetermined rules.

[0211] Optionally, the PDCCH that schedules the AP-CSI-RS and the AP-CSI-RS are in different CCs and the time interval between the PDCCH that schedules the AP-CSI-RS and the AP-CSI-RS is less than a first predetermined threshold.

[0212] Optionally, a second channel or signal exists in the time domain symbol where the AP-CSI-RS is located, and the AP-CSI-RS is received using quasi-co-site parameters of the second channel or signal in the time domain symbol where the AP-CSI-RS is located.

[0213] Optionally, no CORESET is configured in the BWP / serving cell where the AP-CSI-RS is located, or a CORESET group is configured in the BWP / serving cell where the AP-CSI-RS is located and the z value is greater than 1.

[0214] Optionally, the TCI state configured for the AP-CSI-RS in the high-layer signaling includes a quasi-co-site reference signal associated with a spatial reception parameter.

[0215] The TCI state mapping table corresponding to AP-CSI-RS includes one of the following: the TCI state mapping table corresponding to the PDSCH of the BWP / serving cell / serving cell list where the AP-CSI-RS is located; the TCI state mapping table corresponding to the CORESET group where the PDCCH that schedules the AP-CSI-RS is located, wherein the TCIstate of the PDSCH scheduled by the CORESET group belongs to an item in the TCI state mapping table.

[0216] In the embodiment of the present application, high-layer signaling may include signaling other than DCI, such as at least one of the following: RRC, MAC-CE.

[0217] Seventh exemplary embodiment

[0218] In this embodiment, the quasi-co-location reference signal of the AP-CSI-RS is obtained according to the quasi-co-location reference signal of the CORESET with the lowest CORESET-ID in the time unit closest to the AP-CSI-RS in the time unit of the CORESET containing the predetermined characteristics. The CORESET with the predetermined characteristics includes: the CORESET is in the serving cell where the AP-CSI-RS is located, and the CORESET group where the CORESET is located includes the CORESET where the PDCCH that schedules the AP-CSI-RS is located.

[0219] Optionally, the time interval between the PDCCH that schedules the AP-CSI-RS and the AP-CSI-RS is less than a first predetermined threshold.

[0220] Optionally, a second channel or signal exists in the time domain symbol where the AP-CSI-RS is located, and the AP-CSI-RS is received using quasi-co-site parameters of the second channel or signal in the time domain symbol where the AP-CSI-RS is located.

[0221] Optionally, a CORESET group is configured in the BWP / serving cell where the AP-CSI-RS is located.

[0222] Optionally, the TCI state configured for the AP-CSI-RS in the high-layer signaling includes a quasi-co-site reference signal associated with a spatial reception parameter.

[0223] The TCI state mapping table corresponding to AP-CSI-RS includes one of the following: the TCI state mapping table corresponding to the PDSCH of the BWP / serving cell / serving cell list where the AP-CSI-RS is located; the TCI state mapping table corresponding to the CORESET group where the PDCCH that schedules the AP-CSI-RS is located, wherein the TCIstate of the PDSCH scheduled by the CORESET group belongs to an item in the TCI state mapping table.

[0224] In the embodiment of the present application, high-layer signaling may include signaling other than DCI, such as at least one of the following: RRC, MAC-CE.

[0225] Eighth exemplary embodiment

[0226] In this embodiment, when the PDCCH and PDSCH for scheduling PDSCH are in different CCs and the PDCCH for scheduling PDSCH does not include TCI indication information, and the time interval between the PDCCH and PDSCH for scheduling PDSCH is greater than or equal to the first predetermined threshold, the TCI state of PDSCH is obtained according to the TCI state corresponding to the predetermined item codepoint in the TCI state mapping table corresponding to PDSCH, wherein the predetermined item codepoint includes one of the following: the lowest codepoint 0, the lowest codepoint among the codepoints whose corresponding TCI state number is z, the lowest codepoint among the codepoints whose corresponding TCI state number is d, and the lowest codepoint among the codepoints whose corresponding quasi-co-site reference signal set in the TCI state mapping table has the largest number and whose corresponding quasi-co-site reference signal set includes the quasi-co-site reference signal set of the predetermined CORESET. Wherein z is the maximum number of TCIstates corresponding to a codepoint in the TCI state mapping table corresponding to PDSCH, and d is the minimum number of TCI states corresponding to a codepoint in the TCI state mapping table corresponding to PDSCH.

[0227] Optionally, the predetermined codepoint is determined according to signaling information or a predetermined rule, for example, the predetermined codepoint is determined according to at least one of the following information: the number of CDM groups where the DMRS of the PDSCH is located, and the repeated transmission mode of the PDSCH. For example, if the number of CDMs where the DMRS of the PDSCH is located is 1, then the lowest codepoint among the codepoints whose corresponding TCI state number is d.

[0228] Ninth exemplary embodiment

[0229] In this embodiment, when the PDCCH that schedules the PDSCH does not include TCI indication information, the PDSCH corresponds to a quasi co-located reference signal set or a TCI state.

[0230] Optionally, the time interval between the PDCCH and the PDSCH that schedules the PDSCH is greater than or equal to a first predetermined threshold.

[0231] Optionally, when the PDCCH and PDSCH that schedule PDSCH belong to different CCs, the PDSCH corresponds to a maximum of two quasi-co-site reference signal sets or a maximum of two TCI states; when the PDCCH and PDSCH that schedule PDSCH belong to the same CC, the PDSCH corresponds to a maximum of one quasi-co-site reference signal set or a maximum of one TCI state.

[0232] Tenth exemplary embodiment

[0233] In this embodiment, when the PDCCH and PDSCH that schedule PDSCH are in different CCs, third information is determined according to signaling information and / or predetermined rules, and the third information includes at least one of: whether the PDCCH that schedules PDSCH contains TCI indication information, and whether the time interval between the PDCCH and PDSCH that schedules PDSCH can be less than a first predetermined threshold.

[0234] For example, for a Rel-15 UE, the PDCCH that schedules the PDSCH needs to include TCI indication information, and the time interval between the PDCCH that schedules the PDSCH and the PDSCH needs to be greater than or equal to the first predetermined threshold, that is, it cannot be less than the first predetermined threshold; for a Rel-16 UE, the PDCCH that schedules the PDSCH may or may not include TCI indication information, and the time interval between the PDCCH that schedules the PDSCH and the PDSCH is not limited and may be greater than or equal to the first predetermined threshold, or may be less than the first predetermined threshold. Alternatively, for Rel-16 users, the third information is further determined based on the signaling information.

[0235] In the above-mentioned first exemplary embodiment to the tenth exemplary embodiment, further, there is at least one TCI state in the TCI state list configured by RRC corresponding to the BWP / serving cell / serving cell list where the PDSCH / AP-CSI-RS is located, and one TCI state includes a quasi-co-site reference signal associated with QCL-TypeD (i.e., spatial reception parameters). Or a quasi-co-site reference signal associated with QCL-TypeD (i.e., spatial reception parameters) in the TCI state configured for AP-CSI-RS through RRC / MAC-CE.

[0236] Eleventh Exemplary Embodiment

[0237] In the TCI state mapping table, when the number of TCI states corresponding to a codepoint is greater than 1, at least one of the following information can be further indicated through signaling information: whether the PTRS ports corresponding to multiple TCI states are the same; when multiple TCI states correspond to multiple frequency domain resource groups, whether the frequency domain position of the PTRS port corresponding to each TCI state is obtained according to the frequency domain resource groups corresponding to each TCI state.

[0238] Furthermore, the signaling information includes MAC-CE signaling for activating the TCI state mapping table.

[0239] Twelfth Exemplary Embodiment

[0240] In this embodiment, the number of TCIstates of the DMRS of the PDSCH is determined according to the number of CDM groups to which the DMRS included in the PDSCH belongs.

[0241] Specifically, for example, when the number of CDM groups is equal to 1, the number of TCI states is equal to 1; when the number of CDM groups is greater than 1, the number of TCI states is greater than 1, for example, 2.

[0242] Thirteenth Exemplary Embodiment

[0243] In this embodiment, it is determined whether the TCI state set activated by MAC-CE for a frequency domain bandwidth meets a predetermined condition, and whether the acquisition of the quasi-co-site reference signal of AP-CSI-RS / PDSCH considers the time interval between PDCCH and AP-CSI-RS / PDSCH according to the judgment result, wherein PDCCH is the PDCCH that schedules AP-CSI-RS / PDSCH. The TCI state set activated by MAC-CE for a frequency domain bandwidth includes the TCIstate activated by MAC-CE for PDSCH in a frequency domain bandwidth, that is, the set composed of the TCI states in the above TCI state mapping table. One of the frequency domain bandwidths includes one of the following: serving cell, component carrier, BWP, a set of continuous physical resource blocks (PRB).

[0244] Further, the predetermined condition includes at least one TCI state in the TCI state set, and the TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter.

[0245] When the activated TCI state set meets the predetermined conditions, the acquisition of the quasi-co-site reference signal of AP-CSI-RS needs to consider the time interval between the PDCCH that schedules the AP-CSI-RS and the AP-CSI-RS. When the time interval is less than the second predetermined threshold, the quasi-co-site reference signal of the AP-CSI-RS is acquired using the first method. When the time interval is greater than or equal to the second predetermined threshold, the quasi-co-site reference signal of the AP-CSI-RS is acquired according to the information indicated in the PDCCH that schedules the AP-CSI-RS. The first method includes: when there is a second channel or signal on the time domain symbol where the AP-CSI-RS is located, the quasi-co-site reference signal of the AP-CSI-RS is acquired according to the quasi-co-site reference signal of the second channel or signal; otherwise, the quasi-co-site reference signal of the AP-CSI-RS is acquired according to the third information.

[0246] When the activated TCI state set does not meet the predetermined conditions, the acquisition of the quasi-co-site reference signal of the AP-CSI-RS does not need to consider the time interval between the PDCCH that schedules the AP-CSI-RS and the AP-CSI-RS. Regardless of the time interval, the quasi-co-site reference signal of the AP-CSI-RS is always acquired according to the information indicated in the PDCCH that schedules the AP-CSI-RS.

[0247] When the activated TCI state set meets the predetermined conditions, the acquisition of the quasi-co-site reference signal of the PDSCH needs to consider the time interval between the PDCCH and the PDSCH that schedules the PDSCH. When the time interval is less than the first predetermined threshold, the fourth information is used to obtain the quasi-co-site reference signal of the PDSCH. When the time interval is greater than or equal to the first predetermined threshold, the quasi-co-site reference signal of the PDSCH is obtained according to the third method. The third method includes: when the PDCCH that schedules the PDSCH includes the indication information of the TCI state of the PDSCH, the quasi-co-site reference signal of the PDSCH is obtained according to the quasi-co-site reference signal included in the TCIstate of the PDSCH indicated in the PDCCH that schedules the PDSCH; when the PDCCH that schedules the PDSCH does not include the indication information of the TCI state of the PDSCH, the quasi-co-site reference signal of the PDSCH is obtained according to the quasi-co-site reference signal of the PDCCH that schedules the PDSCH.

[0248] When the activated TCI state set does not meet the predetermined conditions, the acquisition of the quasi-co-site reference signal of the PDSCH does not need to consider the time interval between the PDCCH and the PDSCH that schedules the PDSCH. Regardless of the time interval, the quasi-co-site reference signal of the PDSCH is always acquired according to the information indicated in the PDCCH that schedules the PDSCH, or the quasi-co-site reference signal of the PDSCH is acquired according to the third method mentioned above.

[0249] The third information or the fourth information is obtained by using one of the following information A-information C:

[0250] Information A: In the serving cell where the PDSCH / AP-CSI-RS is located, the quasi-co-site reference signal set of the PDSCH / AP-CSI-RS is obtained according to the quasi-co-site reference signal set of the CORESET with the lowest CORESET-ID in the CORESET of the associated detection search space in the slot closest to the PDSCH / AP-CSI-RS.

[0251] Information B: Acquire the quasi-co-site reference signal of the PDSCH / AP-CSI-RS according to the quasi-co-site reference signal of the CORESET with the lowest CORESET-ID in the time unit closest to the PDSCH / AP-CSI-RS in the time unit of the CORESET containing the predetermined characteristics. The CORESET with the predetermined characteristics includes: the CORESET is in the serving cell where the PDSCH / AP-CSI-RS is located, the CORSET group where the CORESET is located includes the CORESET where the PDCCH scheduling the PDSCH / AP-CSI-RS is located, and the search space of the CORESET associated detection in the time unit.

[0252] Information C: Obtain the TCI state of the PDSCH / AP-CSI-RS according to the TCI state corresponding to the predetermined item codepoint in the TCI state mapping table corresponding to the PDSCH / AP-CSI-RS. For example, the predetermined item codepoint includes one of the following: the lowest codepoint among the codepoints whose number of corresponding TCI states is equal to z; the lowest codepoint 0; the lowest codepoint among the codepoints including the predetermined TCI state, where z is the maximum number of TCI states corresponding to a codepoint in the TCI state mapping table.

[0253] Further, when multiple TCI state mapping tables are activated in a frequency domain bandwidth, the above-mentioned determination whether the TCI state set activated by the MAC-CE for a frequency domain bandwidth meets a predetermined condition, wherein the TCI state set activated by the MAC-CE for a frequency domain bandwidth includes one of the following:

[0254] Set 1: a TCI state set consisting of TCI states activated in all TCI mapping tables in multiple TCI state mapping tables;

[0255] Set 2: The activated TCI states in each TCI mapping table in the multiple TCI state mapping tables constitute a TCI state set respectively, and each TCI state set is judged whether it meets the predetermined conditions, and whether the acquisition of the quasi-co-site reference signal of the PDSCH / AP-CSI-RS associated with this TCI state set considers the scheduling time interval of the PDSCH / AP-CSI-RS according to the judgment result. For example, multiple TCI state mapping tables correspond to one CORESET group respectively, and it is determined whether the activated TCI state set in the TCI state mapping table corresponding to each CORESET group meets the predetermined conditions. For example, through judgment, TCI state set 1 activated in TCI state mapping table 1 corresponding to CORESET group 1 meets the predetermined conditions, then the acquisition of the quasi-co-site reference signal of PDSCH / AP-CSI-RS scheduled by CORESET group 1 needs to consider the scheduling time interval of PDSCH / AP-CSI-RS, and TCIstate set 2 activated in TCI state mapping table 2 corresponding to CORESET group 2 does not meet the predetermined conditions, then the acquisition of the quasi-co-site reference signal of PDSCH / AP-CSI-RS scheduled by CORESET group 2 does not need to consider the scheduling time interval of PDSCH / AP-CSI-RS.

[0256] Fig.14 FIG. 4 shows a schematic diagram of the structure of a quasi-co-location information acquisition device provided by an embodiment. The quasi-co-location information acquisition device can be configured in a communication node, such as Fig.14 As shown, it includes: a processing module 10.

[0257] The processing module 10 is configured to obtain the number x and / or determination method of the quasi co-located reference signal set of the first element according to the first information;

[0258] The first information includes at least one of the following information:

[0259] Information indicated in a downlink control channel scheduling the first element;

[0260] The number of quasi-co-site reference signal sets corresponding to the predetermined item codepoint codepoint in the transmission configuration indication state TCI state mapping table;

[0261] The number of CORESET groups;

[0262] The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table;

[0263] The number of time domain repetitions of the first element;

[0264] The number of quasi co-located reference signal sets corresponding to the second element;

[0265] Among them, the time interval between the downlink control channel of the scheduling first element and the first element is less than a predetermined threshold, and the first element includes at least one of a channel or a signal; the time domain intersection between the second element and the first element is not empty, and the second element includes at least one of an element with a scheduling interval greater than a predetermined threshold, a periodic element, a semi-continuous element, a CORESET, a channel, and a signal; x is a positive integer greater than or equal to 1.

[0266] The quasi-co-location information acquisition device provided in this embodiment is to implement the quasi-co-location information acquisition method of the above embodiment. The implementation principle and technical effect of the quasi-co-location information acquisition device provided in this embodiment are similar to those of the above embodiment and will not be repeated here.

[0267] In one embodiment, when the processing module 10 obtains the number x of quasi co-located reference signal sets of the first element according to the first information, the x quasi co-located reference signal sets of the first element belong to a first set, and the first set includes any one of the following sets:

[0268] A set consisting of y quasi-co-site reference signal sets corresponding to the predetermined item codepoint;

[0269] A set consisting of y quasi-co-sited reference signal sets corresponding to the second element;

[0270] Wherein, y is a positive integer greater than or equal to 1, or y is a positive integer greater than or equal to x.

[0271] In one embodiment, the x quasi co-located reference signal sets of the first element include any one of the following sets:

[0272] The first x quasi-co-sited reference signal sets among the y quasi-co-sited reference signal sets;

[0273] The intersection of y quasi co-location reference signal sets and the quasi co-location reference signal set indicated in the downlink control channel scheduling the first element;

[0274] A quasi-co-site reference signal set that meets predetermined characteristics in y quasi-co-site reference signal sets, wherein a quasi-co-site reference signal with associated spatial reception parameters in the quasi-co-site reference signal set that meets the predetermined characteristics and a first quasi-co-site reference signal satisfy a quasi-co-site relationship, and the first quasi-co-site reference signal belongs to a quasi-co-site reference signal with associated spatial reception parameters in a quasi-co-site reference signal set indicated for the first element in a downlink control channel that schedules the first element.

[0275] In one embodiment, when the first set includes y quasi co-located reference signal sets corresponding to the predetermined item codepoint, the first element satisfies at least one of the following characteristics:

[0276] The downlink control channel of the first element is scheduled to be in different frequency domain bandwidths from the first element;

[0277] The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table is greater than 1.

[0278] In one embodiment, the processing module 10 obtains the number x of quasi co-located reference signal sets of the first element according to the number of CORESET groups, including:

[0279] When the number of CORESET groups is greater than 1, x is equal to 1;

[0280] When the number of CORESET groups is equal to 1, x is less than or equal to the maximum number of quasi co-located reference signal sets corresponding to one codepoint in the TCI state mapping table.

[0281] In one embodiment, the processing module 10 obtains the number x of the quasi co-located reference signal set of the first element and / or the determination method according to the time domain repetition number of the first element, including at least one of the following:

[0282] Obtain x values ​​for the first transmission opportunity set and the second transmission opportunity set respectively;

[0283] Determine the same x value corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0284] Determine a determination method for respectively corresponding the first transmission opportunity set and the second transmission opportunity set to different quasi co-site reference signal sets;

[0285] Determine a method for determining the same quasi co-site reference signal set corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0286] A set of quasi co-site reference signal sets is respectively corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0287] Determine a same quasi co-site reference signal set corresponding to the first transmission opportunity set and the second transmission opportunity set;

[0288] Among them, the number of time domain repetitions of the first element is greater than 1, and the time domain repeated transmission opportunities include a first transmission opportunity set and a second transmission opportunity set, and the time interval between the starting time domain symbol of each transmission opportunity in the first transmission opportunity set and the downlink control channel for scheduling the first element is less than a predetermined threshold; the time interval between the starting time domain symbol of each transmission opportunity in the second transmission opportunity set and the downlink control channel for scheduling the first element is greater than or equal to a predetermined threshold.

[0289] In one embodiment, when the processing module 10 acquires the determination method of the quasi co-located reference signal set of the first element according to the first information, the first information further includes at least one of the following information:

[0290] Whether CORESET is configured in the frequency domain bandwidth where the first element is located;

[0291] Whether the downlink control channel that schedules the first element and the first element are in different frequency domain bandwidths.

[0292] In one embodiment, a method for determining the quasi co-located reference signal set of the first element includes at least one of the following methods:

[0293] In the frequency domain bandwidth where the first element is located, the quasi co-located reference signal set of the first element is obtained according to the quasi co-located reference signal set of the CORESET with the lowest CORESET-ID in the CORESET of the association detection search space in the time slot closest to the first element;

[0294] Acquire a quasi-co-location reference signal of the first element according to a quasi-co-location reference signal of a CORESET with a lowest CORESET-ID in a time unit closest to the first element in a time unit of a CORESET containing a predetermined feature, wherein the CORESET with the predetermined feature includes: the CORESET is in a frequency domain bandwidth where the first element is located, the CORESET group where the CORESET is located includes the CORESET where a downlink control channel scheduling the first element is located, and the search space of the CORESET associated detection in the time unit;

[0295] Obtain a quasi-co-site reference signal set of the first element according to a quasi-co-site reference signal set corresponding to a predetermined item codepoint in a TCI state mapping table, wherein the TCI state mapping table is a TCI state mapping table in the frequency domain bandwidth where the first element is located, or the TCI state mapping table is a TCI state mapping table corresponding to a CORESET group where a downlink control channel that schedules the first element is located.

[0296] In one embodiment, when the downlink control channel for scheduling the first element and the first element are in different frequency domain bandwidths,

[0297] In the case where CORESET is not configured in the frequency domain bandwidth where the first element is located, the processing module 10 determines that the x quasi co-located reference signal sets of the first element belong to the quasi co-located reference signal set corresponding to the predetermined item codepoint in the TCI state mapping table;

[0298] In the case where CORESET is configured in the frequency domain bandwidth where the first element is located, the processing module 10 determines x quasi co-located reference signal sets of the first element according to the first information.

[0299] In one embodiment, the processing module 10 determines the x quasi co-located reference signal sets of the first element according to the first information, including at least one of the following methods:

[0300] Determine x quasi co-located reference signal sets according to the maximum number z of quasi co-located reference signal sets corresponding to a codepoint in the TCI state mapping table and / or the number d of CORESET groups in the frequency domain bandwidth where the first element is located;

[0301] When d is equal to 1 and z is equal to 1, determining x quasi co-located reference signal sets according to the quasi co-located reference signal set of the CORESET that satisfies the first predetermined characteristic;

[0302] When d is equal to 1 and z is greater than 1, x quasi-co-site reference signal sets are determined according to one or more quasi-co-site reference signal sets corresponding to a predetermined item codepoint in the TCI state mapping table;

[0303] When d is greater than 1, determining x quasi co-located reference signal sets according to the quasi co-located reference signal set of CORESET that meets the second predetermined characteristic;

[0304] The CORESET of the first predetermined feature includes a CORESET with a lowest CORESET index in a CORESET of a search space for association detection in a time unit closest to the first element, and the CORESET and the first element are located in a frequency domain bandwidth;

[0305] The CORESET of the second predetermined feature includes a search space of associated detection in a time unit closest to the first element and belonging to a predetermined CORESET group, a CORESET with a lowest CORESET index, and the CORESET and the first element are located in a frequency domain bandwidth.

[0306] In one embodiment, the first element satisfies at least one of the following characteristics:

[0307] Scheduling a downlink control channel of the first element and a downlink control channel of the first element in different frequency domain bandwidths;

[0308] When the first element includes a measurement reference signal, the time domain symbol where the first element is located does not include the second element;

[0309] When the first element includes a measurement reference signal, the configuration information of the first element includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0310] In the list of quasi co-location reference signal sets configured in the frequency domain bandwidth where the first element is located, at least one quasi co-location reference signal set includes a quasi co-location reference signal associated with a spatial reception parameter;

[0311] In the list of quasi-co-site reference signal sets activated in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter;

[0312] In the list of activated quasi-co-site reference signal sets corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter;

[0313] In the list of quasi-co-site reference signal sets of PDSCH activated in the frequency domain bandwidth where the first element is located, at least one quasi-co-site reference signal set includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0314] In the list of activated PDSCH quasi co-location reference signal sets corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi co-location reference signal set including a quasi co-location reference signal associated with a spatial reception parameter.

[0315] In one embodiment, the TCI state mapping table satisfies at least one of the following characteristics:

[0316] TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located;

[0317] The TCI state mapping table corresponding to the CORESET group where the downlink control channel of the first element is scheduled;

[0318] In a TCI state set formed by TCI states included in the TCI state mapping table, there is at least one TCI state, and the at least one TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter.

[0319] In one embodiment, the processing module is further configured to determine the x quasi co-located reference signal sets of the first element according to any one of the following judgment results:

[0320] Determine whether a TCI state set included in a TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located includes a TCI state, where the TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter;

[0321] When the judgment result is no, the x quasi co-location reference signal sets of the first element are obtained according to the x quasi co-location reference signal sets indicated in the downlink control channel in the first element of the scheduling;

[0322] When the judgment result is yes, the x quasi-co-site reference signal sets of the first element cannot be obtained according to the x quasi-co-site reference signal sets indicated in the downlink control channel in the scheduling first element, or the x quasi-co-site reference signal sets indicated in the downlink control channel in the scheduling first element meet the predetermined conditions.

[0323] In one embodiment, the processing module 10 acquires the number x of the quasi co-located reference signal sets of the first element according to the information indicated in the downlink control channel for scheduling the first element, including at least one of the following methods:

[0324] When the first element is a channel, the number x of the quasi co-located reference signal set of the first element is determined according to the transmission configuration indication TCI indication field in the downlink control channel of the first element;

[0325] When the first element is a sounding reference signal, the number x of the quasi co-located reference signal set of the first element is determined according to the first codepoint indicated in the TCI indication field obtained from the request field in the downlink control channel of the first element.

[0326] In one embodiment, the predetermined codepoint includes any one of the following codepoints:

[0327] The lowest codepoint among the codepoints with the largest number of corresponding quasi-co-site reference signal sets in the TCI state mapping table;

[0328] The lowest codepoint among the codepoints with the smallest number of corresponding quasi co-site reference signal sets in the TCI state mapping table;

[0329] The number of corresponding quasi co-location reference signal sets in the TCI state mapping table is the largest and the corresponding quasi co-location reference signal set includes the lowest codepoint among the codepoints of the quasi co-location reference signal set of the predetermined CORESET;

[0330] codepoint 0;

[0331] The codepoint indicated by the predetermined item codepoint and the codepoint indicated by the TCI indication field in the downlink control channel of the first scheduling element are two independent codepoints;

[0332] The predetermined item codepoint is not obtained according to the TCI indication field in the downlink control channel of the first scheduling element.

[0333] In one embodiment, the processing module 10 is further configured to determine a transmission mode of the first element based on x, wherein the transmission mode includes a mapping relationship between a set of x quasi-co-site reference signals of the first element and parameters of the first element, and the parameters of the first element include at least one of the following parameters: frequency domain resources, time domain resources, demodulation reference signal DMRS port, and repeated transmission opportunity.

[0334] In one embodiment, the CORESET group satisfies at least one of the following characteristics:

[0335] The CORESET of the CORESET group is located in the frequency domain bandwidth where the first element is located;

[0336] The CORESET group includes the CORESET where the downlink control channel of the first element is scheduled;

[0337] The CORESETs in the CORESET group are located in the frequency domain bandwidth of the first element of the schedule;

[0338] The number of CORESET groups is the number of CORESET groups in the frequency domain bandwidth where the first element is located;

[0339] The number of CORESET groups is the number of CORESET groups in the frequency domain bandwidth where the downlink control channel of the first element is scheduled.

[0340] An embodiment of the present application also provides a communication node, including: a processor, the processor being configured to implement a method provided in any embodiment of the present application when executing a computer program.

[0341] Illustratively, the following embodiment provides a structural diagram when a communication node is a base station.

[0342] Fig.15 A schematic diagram of the structure of a base station provided by an embodiment is shown. Fig.15 As shown, the base station includes a processor 60, a memory 61 and a communication interface 62; the number of processors 60 in the base station can be one or more. Fig.15A processor 60 is taken as an example; the processor 60, the memory 61, and the communication interface 62 in the base station can be connected by a bus or other means. Fig.15 In the example of connecting via a bus, a bus refers to one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus structures.

[0343] The memory 61, as a computer-readable storage medium, can be configured to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the method in the embodiment of the present application. The processor 60 executes at least one functional application and data processing of the base station by running the software programs, instructions and modules stored in the memory 61, that is, implements the above-mentioned quasi-co-location information acquisition method.

[0344] The memory 61 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 61 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 61 may include a memory remotely arranged relative to the processor 60, and these remote memories may be connected to the base station via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a network, a mobile communication network, and combinations thereof.

[0345] The communication interface 62 may be configured to receive and send data.

[0346] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method provided in any embodiment of the present application is implemented.

[0347] The computer storage medium of the embodiment of the present application may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. The computer-readable storage medium includes (a non-exhaustive list): an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by an instruction execution system, device or device or used in combination with it.

[0348] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, the data signal carrying a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0349] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.

[0350] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination of multiple programming languages, including object-oriented programming languages ​​such as Java, Smalltalk, C++, Ruby, Go, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0351] It will be appreciated by those skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.

[0352] In general, various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the present application is not limited thereto.

[0353] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0354] The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile discs DVD or CD discs), etc. Computer-readable media may include non-transient storage media. The data processor may be of any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (Digital Signal Processing, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a programmable logic device (Field-Programmable Gate Array, FGPA) and a processor based on a multi-core processor architecture.

Claims

1. A method for acquiring quasi-co-location information, comprising: Acquire x quasi-co-site reference signal sets of a first element according to y quasi-co-site reference signal sets, where the first element includes a physical downlink shared channel PDSCH or an aperiodic channel state measurement reference signal AP-CSI-RS; The y quasi co-site reference signal sets include one of the following: y quasi-co-site reference signal sets corresponding to a predetermined item codepoint codepoint in a transmission configuration indication state TCI state mapping table, wherein the predetermined item codepoint includes the codepoint with the lowest index among the codepoints with the largest number of corresponding quasi-co-site reference signal sets in the TCI state mapping table, wherein x is a positive integer less than or equal to y; or The second element corresponds to a set of y quasi-co-sited reference signals, where x is less than y; The time interval between the downlink control channel for scheduling the first element and the first element is less than a predetermined threshold; the time domain intersection between the second element and the first element is not empty, the second element includes at least one of an element with a scheduling interval greater than the predetermined threshold, a periodic element, a semi-persistent element, and a control resource set CORESET, and the element includes at least one of a channel and a signal; y is a positive integer greater than 1; Wherein, a quasi co-site reference set includes one or more quasi co-site reference signals configured in a TCI state; When x is less than y, the x quasi co-located reference signal sets of the first element include: The first x quasi-co-located reference signal sets among the y quasi-co-located reference signal sets.

2. The method according to claim 1, wherein: When the second element exists on the time domain symbol where the first element is located, acquiring the x quasi co-site reference signal sets according to the y quasi co-site reference signal sets corresponding to the second element; When the second element does not exist on the time domain symbol where the first element is located, the x quasi co-located reference signal sets are obtained according to the y quasi co-located reference signal sets corresponding to the predetermined code point codepoint.

3. The method according to claim 1, wherein: In the case where the first element includes the PDSCH: Determine a mapping relationship between the x quasi-co-site reference signal sets and the d resources of the first element, wherein the resources include at least one of the following: a frequency domain resource group, a time domain resource group, a demodulation reference signal DMRS port group, wherein d is a positive integer greater than 1.

4. The method according to claim 3, wherein: In the case where x=2 and the transmission mode notified by the higher layer is 'TDMSchemeA', different repeated transmission opportunities in a time slot correspond to different quasi-co-located reference signal sets among the x quasi-co-located reference signal sets.

5. The method according to claim 3, wherein: When x=2 and in the time domain parameter list configured by the high-level layer, at least one time domain parameter includes the number of repeated transmissions between slots and the time domain parameter item indicated by the control channel that schedules the first element includes the number of repeated transmissions between slots, different sets of the x quasi-co-site reference signal sets correspond to different transmission sets in the d repeated transmissions of the first element, wherein the x quasi-co-site reference sets are replaced once every 2 repeated transmission opportunities in the d repeated transmissions of the first element, or the x quasi-co-site reference sets are replaced once every 1 repeated transmission opportunity in the d repeated transmissions of the first element.

6. The method according to any one of claims 1 to 5, wherein: The TCI state mapping table satisfies at least one of the following characteristics: A TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located; A TCI state mapping table corresponding to the CORESET group to which the downlink control channel of the first element is scheduled; In a TCI state set formed by TCI states included in the TCI state mapping table, there is at least one TCI state, and the at least one TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter.

7. The method according to any one of claims 1 to 5, further comprising: Determine the x quasi co-located reference signal sets of the first element according to any one of the following judgment results: Determine whether a TCI state set included in a TCI state mapping table corresponding to the frequency domain bandwidth where the first element is located includes a TCI state, wherein the TCI state includes a quasi-co-site reference signal associated with a spatial reception parameter; If the judgment result is no, the x quasi co-location reference signal sets of the first element are obtained according to the x quasi co-location reference signal sets indicated in the downlink control channel in scheduling the first element; When the judgment result is yes, the x quasi co-located reference signal sets of the first element cannot be obtained according to the x quasi co-located reference signal sets indicated in the downlink control channel in scheduling the first element.

8. The method according to any one of claims 1 to 5, wherein: The time interval between the downlink control channel for scheduling the first element and the first element is less than a predetermined threshold, and when the first element includes multiple transmission opportunities, it includes: The time interval between the downlink control channel for scheduling the first element and the first transmission opportunity of the first element is smaller than the predetermined threshold.

9. The method according to any one of claims 1 to 5, wherein: The first element satisfies at least one of the following characteristics: In the case where the first element includes the measurement reference signal, the configuration information of the first element includes a quasi-co-site reference signal associated with a spatial reception parameter; In the list of quasi co-location reference signal sets configured in the frequency domain bandwidth where the first element is located, at least one quasi co-location reference signal set includes a quasi co-location reference signal associated with a spatial reception parameter; In the list of quasi-co-site reference signal sets activated in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter; In the list of activated quasi-co-site reference signal sets corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter; In the list of quasi-co-site reference signal sets of PDSCH activated in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter; In the quasi-co-site reference signal set list of the activated PDSCH corresponding to the predetermined CORESET group in the frequency domain bandwidth where the first element is located, there is at least one quasi-co-site reference signal set including a quasi-co-site reference signal associated with a spatial reception parameter.

10. The method according to claim 1, further comprising When the PDCCH scheduling the PDSCH and the PDSCH are in different CCs, the third information is determined according to the signaling information, and the third information includes at least one of: whether the PDCCH scheduling the PDSCH contains TCI indication information, and whether the time interval between the PDCCH scheduling the PDSCH and the PDSCH can be less than a first predetermined threshold.

11. The method according to claim 1, further comprising: The communication node acquires at least one of the following of the quasi co-location reference signal set of the first element according to the first information: the number x, or the determination method; The first information includes at least one of the following information: Information indicated in a downlink control channel scheduling the first element; The number of quasi-co-located reference signal sets corresponding to the predetermined item codepoint codepoint in the transmission configuration indication state TCI state mapping table; Control the number of resource set CORESET groups; The maximum number of quasi-co-site reference signal sets corresponding to a codepoint in the TCI state mapping table; The number of quasi co-located reference signal sets corresponding to the second element.

12. A communication node, comprising: A processor, wherein the processor is configured to implement the quasi-co-location information acquisition method according to any one of claims 1 to 11 when executing a computer program.

13. A computer-readable storage medium storing a computer program, wherein: When the computer program is executed by a processor, the quasi-co-location information acquisition method according to any one of claims 1 to 11 is implemented.

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