Pdcch resource mapping method and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a PDCCH resource mapping method and a communication device. The PDCCH resource mapping method in the embodiments of the present application comprises: a communication device performing signal mapping on resource elements (REs) of a candidate physical downlink control channel (PDCCH) on the basis of at least one of the following: a resource element group (REG) bundle number; a control channel element (CCE) number; a sub-control channel resource set (sub-CORESET) number; a sub-band number; and a first order, wherein the first order is the order of REG bundles included in CCEs corresponding to the REs of the candidate PDCCH.

Description

PDCCH resource mapping method and communication equipment

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2025104934992, filed on April 18, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and more specifically, to a PDCCH resource mapping method and a communication device. Background Technology

[0004] In related technologies, for a candidate Physical Downlink Control Channel (PDCCH), the UE assumes that the modulated symbols are mapped onto the candidate PDCCH in a frequency domain-first, time domain-later manner. This frequency domain-first, time domain-later manner is not flexible enough. For example, it cannot meet the needs of scenarios with longer time domain PDCCHs or discrete spectrum PDCCHs, and it also brings additional complexity to the implementation of terminal and network-side equipment. Summary of the Invention

[0005] This application provides a PDCCH resource mapping method and communication device, which can solve the problems of the frequency domain-first-time domain mapping method in related technologies, improve the flexibility of PDCCH resource mapping, and reduce the complexity of terminal and network side devices in implementing PDCCH resource mapping.

[0006] Firstly, a PDCCH resource mapping method is provided, executed by a communication device, the method comprising:

[0007] The communication device performs signal mapping on the resource elements (REs) of the candidate physical downlink control channel (PDCCH) according to at least one of the following:

[0008] Resource element bundle (REG) number;

[0009] Control Channel Element (CCE) number;

[0010] Sub-CORESET number;

[0011] Sub-band numbering;

[0012] First order;

[0013] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0014] Secondly, a PDCCH resource mapping apparatus is provided, the apparatus comprising:

[0015] The processing module is configured to perform signal mapping on the resource elements (REs) of the candidate physical downlink control channel (PDCCH) according to at least one of the following:

[0016] Resource element bundle (REG) number;

[0017] Control Channel Element (CCE) number;

[0018] Sub-CORESET number;

[0019] Sub-band numbering;

[0020] First order;

[0021] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0022] Thirdly, a communication device is provided, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method described in the first aspect.

[0023] Fourthly, a communication device is provided, including a processor and a communication interface, wherein the processor is configured to perform signal mapping on resource elements (REs) of candidate physical downlink control channels (PDCCHs) according to at least one of the following:

[0024] Resource element bundle (REG) number;

[0025] Control Channel Element (CCE) number;

[0026] Sub-CORESET number;

[0027] Sub-band numbering;

[0028] First order;

[0029] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0030] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0031] A sixth aspect provides a wireless communication system, comprising: a terminal and a network-side device, wherein the terminal is configured to perform the steps of the method described in the first aspect, and the network-side device is configured to perform the steps of the method described in the first aspect.

[0032] In a seventh aspect, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the steps of the PDCCH resource mapping method as described in the first aspect.

[0033] Eighthly, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the PDCCH resource mapping method as described in the first aspect.

[0034] In this embodiment, signal mapping is performed on the REs of the candidate PDCCH based on at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and a first order. By considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the PDCCH resource mapping is not limited to the frequency domain-first-time domain mapping method, which improves the flexibility of PDCCH resource mapping and can meet the needs of more flexible PDCCH scenarios. Furthermore, by considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the steps of sorting REG bundles can be reduced, thereby reducing the complexity of PDCCH resource mapping for terminals and network-side devices. Attached Figure Description

[0035] Figure 1 is a block diagram of a wireless communication system applicable to an embodiment of this application;

[0036] Figure 2 is a flowchart illustrating the PDCCH resource mapping method provided in some embodiments of this application;

[0037] Figure 3 is one of the schematic diagrams of REG bundle to CCE mapping provided in the embodiments of this application;

[0038] Figure 4 is a second schematic diagram of the REG bundle to CCE mapping provided in the embodiments of this application;

[0039] Figure 5 is a third schematic diagram of the REG bundle to CCE mapping provided in the embodiments of this application;

[0040] Figure 6 is a fourth schematic diagram of the REG bundle to CCE mapping provided in the embodiments of this application;

[0041] Figure 7 is the fifth schematic diagram of the REG bundle to CCE mapping provided in the embodiments of this application;

[0042] Figure 8 is a schematic diagram of the structure of a PDCCH resource mapping device provided in some embodiments of this application;

[0043] Figure 9 is a schematic diagram of the structure of a communication device that implements an embodiment of this application;

[0044] Figure 10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application;

[0045] Figure 11 is a schematic diagram of the hardware structure of a network-side device that implements an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0047] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0049] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0050] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as User Equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0051] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), and Binding Support. Functions include BSF, Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform station).It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment. If the name of the core network equipment mentioned in the embodiments of this application changes in subsequent protocol versions (e.g., 6G), it is also within the scope of protection of this application.

[0052] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0053] In LTE, the PDCCH occupies the entire bandwidth in the frequency domain and the first 1-3 OFDM symbols of each subframe in the time domain. The network-side device only needs to inform the UE of the number of OFDM symbols occupied by the PDCCH, and the UE can determine the search space of the PDCCH. In NR, due to the larger system bandwidth, to avoid wasting resources, the PDCCH does not occupy the entire bandwidth, and the UE needs to know the location of the PDCCH in the frequency and time domains. For convenience, in NR, information such as the frequency band occupied by the PDCCH in the frequency domain and the number of OFDM symbols occupied in the time domain are encapsulated in the Control Resource Set (CORESET), while information such as the starting symbol index of the PDCCH and the PDCCH listening period are encapsulated in the Search Space.

[0054] CORESET is a definition similar to the LTE PDCCH control domain, and it can be all or part of the BWP frequency domain PRB. The duration of CORESET (in symbols) can be configured to 1, 2, or 3. The resources related to CORESET are defined as follows:

[0055] Resource Element Group (REG): A resource element group that occupies 1 symbol in the time domain and 1 PRB in the frequency domain;

[0056] REG bundle: A combination of L REGs, where L represents the size of the REG bundle, which is configured by the RRC parameter reg-bundle-size;

[0057] For non-interleaved CCE-to-REG mapping, L is fixed at 6;

[0058] For interleaved CCE-to-REG mapping, when the number of CORESET symbols is configured to 1, L can be configured to 2 or 6; when the number of CORESET symbols is configured to 2 or 3, L can be configured to the number of CORESET symbols or 6.

[0059] Control-channel element (CCE): The CCE is the basic logical unit carrying the downlink control channel (PDCCH). One REG corresponds to one RB (12 subcarriers) and one OFDM symbol. Excluding the resources occupied by the DMRS (demodulation reference signal), one CCE contains 6 REGs. Mapping is performed according to the following CCE-to-REG mapping rules.

[0060] CCE-to-REG mapping can be configured to be interleaved or non-interleaved, and is performed at the REG bundle granularity according to the following rules:

[0061] First, REGs are numbered according to the principle of first proceeding from the time domain to the end, and then from the frequency domain to the highest frequency domain.

[0062] The i-th REG bundle contains REG{i*L,i*L+1,…,i*L+L-1}, where i = 0, 1,… in, The number of REGs configured for CORESET For CORESET sign number, The number of resource blocks (RBs) occupied by the CORESET in the frequency domain is the product of the number of resource blocks occupied by the CORESET in the frequency domain and the number of OFDM symbols occupied by the CORESET in the time domain.

[0063] For a CCE j, it contains REG bundles {f(6j / L), f(6j / L+1), ..., f(6j / L+6 / L-1)}, and a CCE contains 6 / L REG bundles.

[0064] For non-interleaved CCE-to-REG mapping, L = 6 and f(x) = x;

[0065] For interleaved CCE-to-REG mappings, L∈{2,6}for and for And the interleaving function is: x=cR+rr=0,1,…,R-1 c=0,1,…,C-1

[0066] Where R is the interleaver size, which is the number of rows in the corresponding interleaver matrix, and can be configured to be 2, 3, or 6. n is an integer; shift For shift index, n shift ∈{0,1,…,274} can be configured through the higher-level parameter shiftIndex; otherwise...

[0067] When the higher-layer parameter precoderGranularity is configured as sameAsREG-bundle, the UE assumes that the precoding within a REG bundle is the same;

[0068] When the higher-layer parameter precoderGranularity is configured as allContiguousRBs, the UE assumes that the precoding on consecutive REGs within the CORESET is the same, and that the consecutive REGs do not overlap with the REs of the LTE cell-specific reference signal (CRS) configured under any synchronization signal and PBCH block (SSB) or DSS (Direct Sequence Spread Spectrum) conditions.

[0069] For CORESET 0, the UE is assumed to be interleaved, with L=6 and R=2.

[0070] In related technologies, the CCE index of each candidate PDCCH within the CORESET is determined according to a given search space function. Specifically, for the search space set s of the associated control resource set p, in the time slot... Aggregate candidate control channels of level L The CCE index is given by the following formula:

[0071] Among them, for public search space, For the UE-specific search space Y p,-1 =n RNTI ≠0, D=65537, A p =39827;

[0072] in, For CCE index, For the control channel, N CCE,p This represents the total number of CCEs. n is the number of candidate sets with aggregation degree L; CI For carrier number; The slot number; the set of possible locations where the CORESET can appear, i.e., the candidate set.

[0073] In NR, for a candidate PDCCH, the UE assumes that the modulated symbols are mapped to the candidate PDCCH in a frequency domain first and then time domain manner, that is, the entire candidate PDCCH is mapped in a frequency domain first and then time domain manner.

[0074] The mapping method of the entire candidate PDDCH from the frequency domain to the time domain does not take into account the scenario requirements of PDCCH with a longer time domain and discrete spectrum PDCCH, which is not flexible enough.

[0075] In scenarios requiring more flexible PDCCH, continuing to use the mapping method of the entire candidate PDDCH first in the frequency domain and then in the time domain will bring additional complexity to the implementation of terminal and network-side devices.

[0076] When CCE-to-REG mapping uses an interleaving method, following the current NR method of first the frequency domain and then the time domain for RE mapping, the interleaved REG bundle is buffered in a buffer.

[0077] When a base station needs to transmit a Downlink Control Information (DCI) with AL=1 on CCE0, the steps for determining the time-frequency resources mapped to the DCI resources are as follows:

[0078] 1) Determine the starting address and length of the REG Bundle corresponding to CCE0 in the buffer, for example, 0 and 3 respectively;

[0079] 2) Starting from address 0 of the buffer, read 3 REG Bundles consecutively to obtain the stored REG Bundle indices, which are 0, 3, and 1 respectively;

[0080] 3) Sort the obtained REG Bundle indices to get 0, 1, 3, and then convert them to frequency domain position k;

[0081] 4) Complete resource mapping using the frequency domain first, then time domain method;

[0082] Similarly, when a base station wants to transmit a DCI with AL=1 on CCE1, the steps for determining the time-frequency resources mapped to the DCI resources are as follows:

[0083] 1) Determine the starting address and length of the REG Bundle corresponding to CCE1 in the buffer, as shown in the figure, which are 3 and 3 respectively;

[0084] 2) Starting from address 3 in the buffer, read 3 REG Bundles consecutively to obtain the stored REG Bundle indices, which are 4, 2, and 5 respectively;

[0085] 3) Sort the obtained REG Bundle indices to get 2, 4, and 5, and then convert them to frequency domain positions k;

[0086] 4) Complete the resource mapping by first mapping the frequency domain and then the time domain.

[0087] Similarly, when a base station wants to transmit a DCI with AL=2 on CCE0 and CCE1, the steps for determining the time-frequency resources mapped to the DCI resources are as follows:

[0088] 1) Determine the starting address and length of the REG Bundle corresponding to CCE0 and CCE1 in the buffer, for example, 0 and 6 respectively;

[0089] 2) Starting from address 0 of the buffer, read 6 REG Bundles consecutively to obtain the stored REG Bundle indices, which are 0, 3, 1, 4, 2, and 5 respectively;

[0090] 3) Sort the obtained REG Bundle indexes to get 0, 1, 2, 3, 4, 5, and then convert them to frequency domain position k;

[0091] 4) Complete resource mapping using the frequency domain first, then time domain method;

[0092] Through the discussion of the above three cases, it was found that step 3) requires sorting the obtained REG Bundle index. This behavior does not bring performance gains and increases the implementation complexity.

[0093] Step 3) for the terminal means that each blind test requires an additional sorting operation. The terminal's blind test process includes the following steps: a) Equalize and demodulate the entire frequency domain data on the CORESET to obtain the LLR, and store it in buffer0; b) Calculate the interleaved REG Bundle index and store it in buffer1; c) Read the REG Bundle index from buffer1 based on the starting CCE position and AL of this blind test; d) Sort the read REG Bundle index and convert it into time-frequency resource positions k and l; e) Read the corresponding LLR from buffer0 based on k and l and decode it; Starting from step c), the next blind test is performed; each blind test requires step d). If the REG Bundle index is sorted in real time for each blind test, the processing latency will increase; if it is calculated in advance, it will consume a lot of storage resources because the result of each blind test in each slot is different and needs to be stored.

[0094] In summary, the PDCCH resource mapping method in related technologies is not flexible enough, which brings additional complexity to the implementation of base stations and terminals.

[0095] To address, or at least partially address, the above-mentioned problems, embodiments of this application propose an improved PDCCH resource mapping method and communication device.

[0096] The PDCCH resource mapping method and communication device provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0097] Figure 2 is a flowchart illustrating a PDCCH resource mapping method provided in some embodiments of this application. It should be noted that this PDCCH resource mapping method is executed by a communication device, which can be a terminal or a network-side device.

[0098] As shown in Figure 2, the PDCCH resource mapping method includes:

[0099] Step 200: The communication device performs signal mapping on the resource elements RE of the candidate physical downlink control channel (PDCCH) according to at least one of the following:

[0100] Resource element bundle (REG) number;

[0101] Control Channel Element (CCE) number;

[0102] Sub-CORESET number;

[0103] Sub-band numbering;

[0104] First order;

[0105] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0106] Taking the PDCCH resource mapping method provided in this application embodiment as an example, the terminal determines a candidate PDCCH and performs signal mapping on the candidate PDCCH RE based on at least one of the following: the REG bundle number corresponding to the candidate PDCCH RE, the CCE number corresponding to the candidate PDCCH RE, and a first order. That is, complex symbols are mapped to the candidate PDCCH RE based on the REG bundle number corresponding to the candidate PDCCH RE, the CCE number corresponding to the candidate PDCCH RE, and at least one of the first order. By considering the REG bundle number, the CCE number corresponding to the candidate PDCCH RE, and at least one of the first order, the flexibility of PDCCH resource mapping can be improved, and the complexity of PDCCH resource mapping implemented by the terminal and network-side equipment can be reduced.

[0107] Optionally, when the control channel resource set (CORESET) contains multiple sub-control channel resource sets (sub-CORESET), complex symbols are mapped to the candidate PDCCH REs based on at least one of the following: the sub-CORESET number corresponding to the candidate PDCCH RE, the REG bundle number corresponding to the candidate PDCCH RE, the CCE number corresponding to the candidate PDCCH RE, and the first order. By considering flexible PDCCH RE mapping under the time division multiplexing (TDM) CCE or sub-CORESET, performance can be improved and implementation complexity reduced.

[0108] Optionally, when the control channel resource set (CORESET) contains multiple sub-bands, complex symbols are mapped to the candidate PDCCH REs based on at least one of the following: the sub-band number corresponding to the candidate PDCCH RE, the REG bundle number corresponding to the candidate PDCCH RE, the CCE number corresponding to the candidate PDCCH RE, and the first order. This PDCCH RE mapping, which aggregates the positions of multiple bands, improves performance and reduces implementation complexity.

[0109] The first order is the order of REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH. Optionally, the order of REG bundles contained in each CCE is the order of interleaved REG bundles contained in each CCE. Mapping is performed according to the order of the interleaved REG bundles, thus eliminating the need to sort the obtained REG bundles again. Compared with the frequency domain-first, time domain-second mapping method, which requires sorting the obtained REG bundles for each blind detection, this method can effectively reduce the complexity of PDCCH resource mapping for terminal and network-side devices.

[0110] The PDCCH resource mapping method provided in this application performs signal mapping on the REs of candidate PDCCHs based on at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and a first order. By considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the PDCCH resource mapping is not limited to the frequency domain-first-time domain mapping method, which improves the flexibility of PDCCH resource mapping and can meet the needs of more flexible PDCCH scenarios. Furthermore, by considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the steps of sorting REG bundles can be reduced, thereby reducing the complexity of PDCCH resource mapping for terminals and network-side devices.

[0111] In some embodiments, the first order relates to at least one of the following:

[0112] REG bundle number;

[0113] REG bundle size;

[0114] Interlacing size parameter;

[0115] Interleaving function;

[0116] Interleaving offset parameters;

[0117] The number of resource blocks (RBs) contained in the control channel resource set;

[0118] Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

[0119] The REG bundle number is the REG bundle index; the REG bundle size is L; the interleaving size parameter includes R; the interleaving function is f(x); and the interleaving offset parameter is the shift index n. shift The number of resource blocks (RBs) contained in the control channel resource set, i.e., the CORESET RB number. The interleaving configuration is used to indicate whether the mapping from the REG bundle to the CCE is interleaved or non-interleaved.

[0120] In some embodiments, the first order includes one of the following:

[0121] The REG bundle numbers are in ascending order;

[0122] The REG bundle numbers are in descending order;

[0123] The order of the interleaved REG bundles within the CCE.

[0124] It is understood that the first order can be either an ascending or descending order of REG bundle numbers. Here, the first order is either an ascending order of REG bundle numbers before interleaving within the CCE, or a descending order of REG bundle numbers before interleaving within the CCE. In other embodiments, the first order is the order of REG bundles after interleaving.

[0125] In some embodiments, the signal mapping of resource elements (REs) of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0126] The CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order.

[0127] The CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0128] The candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number.

[0129] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0130] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0131] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

[0132] The PDCCH resource mapping method proposed in this application reduces the complexity and processing latency of terminal or network-side devices by considering CCE numbers and REG bundle numbers during the PDCCH resource mapping process. It includes three implementation methods: Method 1, Method 2, and Method 3. These are described below.

[0133] Method 1: Map the CCEs in ascending order as follows: For each CCE, map the REG bundles within the CCE in the first order; within the REG bundles, map the REGs in the second order or the REs in the third order.

[0134] The mapping method described above can be understood as follows: First, REG bundles are mapped in the first order. Within each REG bundle, REGs are mapped in the second order or REs in the third order. Then, CCEs are mapped in ascending order of their CCE numbers. In other words, REG bundles are mapped in the first order. For the first REG bundle, REGs are mapped in the second order or REs in the third order within that first REG bundle. The same method is then used for the next REG bundle until all REG bundles within a CCE have been mapped. The mapping of CCEs is then performed in ascending order of their CCE numbers.

[0135] Optionally, the second order relates to one of the following: the time-domain index of REG within the first object, the frequency-domain index of REG within the first object, or the index of REG within the first object. The index is also known as the number.

[0136] Optionally, the first object includes one of the following: carrier, bandwidth part (BWP), CORESET, candidate PDCCH, CCE, or REG bundle. For example, the time-domain index of REG within the first object can be the time-domain index of REG within the carrier, or the time-domain index of REG within the BWP, or the time-domain index of REG within the candidate PDCCH, or the time-domain index of REG within the CCE, or the time-domain index of REG within the REG bundle.

[0137] In some embodiments, the second order includes one of the following: REG indexes in ascending order; REG indexes in descending order; time domain first, then frequency domain; frequency domain first, then time domain.

[0138] The REG index here can be the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object.

[0139] It should be noted that "time domain first, frequency domain second" means that the time domain is processed first from front to back, and then the frequency domain is processed from low to high.

[0140] Optionally, the third order relates to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object.

[0141] Optionally, the third order includes one of the following: RE indexes in ascending order; RE indexes in descending order; time domain first, then frequency domain; frequency domain first, then time domain.

[0142] The RE index here can be the time-domain index of the RE within the first object, or the frequency-domain index of the RE within the first object, or the index of the RE within the first object.

[0143] Optionally, the first object can be a carrier, BWP, CORESET, candidate PDCCH, CCE, or REG bundle. For example, the time-domain index of RE within the first object can be the time-domain index of RE within the carrier, or the time-domain index of RE within the BWP, or the time-domain index of RE within the candidate PDCCH, or the time-domain index of RE within the CCE, or the time-domain index of RE within the REG bundle.

[0144] Method 1 includes the following steps:

[0145] Step 1: Determine the REG bundle number corresponding to the resource element RE of the candidate PDCCH and the CCE number corresponding to the resource element RE of the candidate PDCCH;

[0146] Step 2: Sort the CCEs in ascending order of their CCE numbers, and starting with the CCE with the smallest number, map them sequentially as follows:

[0147] Within CCE j, REG bundles are mapped according to a first order, which is related to at least one of the following: REG bundle number; REG bundle size (i.e., L); interleaving size parameter (i.e., R); interleaving function (i.e., f(x)); interleaving offset parameter (i.e., shift index n). shift The number of resource blocks (RBs) contained in the control channel resource set (i.e., the number of CORESETRBs). ); Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

[0148] j is an integer greater than or equal to 0. It's understandable that "greater than or equal to 0" means either greater than zero or equal to zero.

[0149] Optionally, the first order includes one of the following:

[0150] REG bundle numbers are in ascending order;

[0151] REG bundle numbers are ordered from largest to smallest;

[0152] The order of REG bundles after interleaving within CCE.

[0153] In some embodiments, the first order is the REG bundle index in ascending or descending order.

[0154] In other embodiments, the first order is the order of the interleaved REG bundles within the CCE, that is, the order of REG bundles{f(6j / L),f(6j / L+1),…,f(6j / L+6 / L-1)} in CCE j, where f() is the interleaving function;

[0155] For example, for R = 2, L = 2, n shift In the case of 0, according to the following interleaving function, the REG bundles contained in CCE 0 are {f(0),f(1),f(2)} = {0,3,1}. x=cR+rr=0,1,…,R-1 c=0,1,…,C-1

[0156] Optionally, within each REG bundle, REGs are mapped according to a second order. Optionally, the second order includes one of the following: the REGs in ascending order of their time-domain indices within the first object; the REGs in ascending order of their frequency-domain indices within the first object; the REGs in ascending order of their indices within the first object; the REGs in descending order of their time-domain indices within the first object; the REGs in descending order of their frequency-domain indices within the first object; the REGs in descending order of their indices within the first object; a time-domain first, then frequency-domain first; a frequency-domain first, then time-domain first. The first object is described above and will not be repeated here.

[0157] Optionally, the mapping method corresponding to the above method one includes one of the following:

[0158] Within the REG bundle, the REG is mapped in either the frequency domain first and then the time domain, or the time domain first and then the frequency domain. Then, the REG is mapped in CCE j in ascending order of CCE index, following the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)}.

[0159] Within the REG bundle, REGs are mapped in ascending or descending order of their REG indices. Then, within CCE j, REG bundles are mapped in ascending order of their CCE indices, following the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)}.

[0160] Within the REG bundle, REGs are mapped in either the frequency domain first and then the time domain, or the time domain first and then the frequency domain. Then, within CCE j, REG bundles are mapped in ascending order of their CCE index numbers.

[0161] Within the REG bundle, REGs are mapped in ascending or descending order of their REG indices. Then, within CCE j, REG bundles are mapped in descending order of their REG bundle numbers, following the ascending order of their CCE indices.

[0162] Optionally, within each REG bundle, REs are mapped according to a third order. Optionally, the third order includes one of the following: REs in ascending order of time-domain index within the first object; REs in ascending order of frequency-domain index within the first object; REs in ascending order of index within the first object; REs in descending order of time-domain index within the first object; REs in descending order of frequency-domain index within the first object; REs in descending order of index within the first object; time-domain first, then frequency-domain; frequency-domain first, then time-domain; time-domain first, then frequency-domain; frequency-domain first, then time-domain. The first object is described above and will not be repeated here.

[0163] Optionally, the mapping method corresponding to the above method one includes one of the following:

[0164] Within the REG bundle, REs are mapped in either the frequency domain first and then the time domain, or the time domain first and then the frequency domain. Then, within CCE j, mappings are performed in ascending order of CCE index according to the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)}.

[0165] Within the REG bundle, REs are mapped in ascending or descending order of their RE indices. Then, within CCE j, mappings are performed in ascending order of CCE indices according to the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)}.

[0166] Within the REG bundle, REs are mapped in either the frequency domain first and then the time domain, or the time domain first and then the frequency domain. Then, within CCE j, REG bundles are mapped in ascending order of CCE index.

[0167] Within the REG bundle, REs are mapped in ascending or descending order of their RE indices. Then, within CCE j, REG bundles are mapped in descending order of their REG bundle numbers, following the ascending order of their CCE indices.

[0168] The following examples further illustrate the mapping method corresponding to Method 1.

[0169] The UE assumes that after scaling the modulated complex symbol group (adjusting the amplitude or power of the signal), it is mapped in the REG bundle in the order of frequency domain first and time domain. Then, it is mapped in CCE j in the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)} according to the CCE index from smallest to largest.

[0170] by( R = 2, L = 2, n shift Taking the parameter set =0 as an example, the PDCCH resource mapping process includes the following:

[0171] 1) DCI obtains constellation symbols through encoding, scrambling, and modulation;

[0172] 2) Obtain the REG bundle number used for resource mapping based on the aggregation level (AL) and the location of the CCE;

[0173] 3) Calculate the location of the time-frequency resource based on the REG bundle number;

[0174] 4) Complete resource mapping according to the rule of first the frequency domain and then the time domain;

[0175] In step 2), calculating the REG bundle number can be done using a "row-list" method. Figure 3 is one of the schematic diagrams of the REG bundle to CCE mapping provided in this application embodiment. Referring to Figure 3, the final mapping order is REG bundle0,3,1,4,2,5, and the mapping within each REG bundle is performed using a frequency domain first, then time domain method.

[0176] It should be noted that if the first order is the order of the interleaved REG bundles within the CCE, the step of sorting the REG bundles can be avoided, reducing the implementation complexity of the terminal or network-side devices.

[0177] The PDCCH resource mapping method provided in this application sorts CCEs by number from smallest to largest, and maps them sequentially starting from the CCE with the smallest number in the following manner: within CCE j, the REG bundles within CCE j are mapped in a first order; within the REG bundles, the REGs are mapped in a second order or the REs are mapped in a third order. This makes PDCCH resource mapping not limited to the frequency domain-first-time domain mapping method, improving the flexibility of PDCCH resource mapping. By considering the CCE number and the first order, the steps of sorting REG bundles can be reduced, reducing the complexity of PDCCH resource mapping for terminals and network-side devices, and meeting the needs of more flexible PDCCH scenarios for 6G.

[0178] Method 2: Map the CCEs in ascending order as follows: For each CCE, map them in either the frequency domain first, then the time domain, or the time domain first, then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order; or first, the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle.

[0179] Method 2 includes the following steps:

[0180] Step 1: Determine the REG bundle number corresponding to the resource element RE of the candidate PDCCH and the CCE number corresponding to the resource element RE of the candidate PDCCH;

[0181] Step 2: Sort the CCEs in ascending order of their CCE numbers, and starting with the CCE with the smallest number, map them sequentially as follows:

[0182] Within CCE j, the REG bundles are sorted to obtain a first order, which is related to at least one of the following: REG bundle number; REG bundle size (i.e., L); interleaving size parameter (i.e., R); interleaving function (i.e., f(x)); interleaving offset parameter (i.e., shift index n). shift The number of resource blocks (RBs) contained in the control channel resource set (i.e., the number of CORESETRBs). ); Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved. j is an integer greater than or equal to 0.

[0183] Optionally, the first order includes one of the following:

[0184] REG bundle numbers are in ascending order;

[0185] REG bundle numbers are ordered from largest to smallest;

[0186] The order of REG bundles after interleaving within CCE.

[0187] In one implementation, the first order is the REG bundle index in ascending or descending order.

[0188] In another implementation, the first order is the order of the REG bundles after interleaving within the CCE, that is, the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)} in CCE j, where f() is the interleaving function;

[0189] For example, for R = 2, L = 2, n shift In the case of 0, according to the following interleaving function, the REG bundles contained in CCE 0 are {f(0),f(1),f(2)} = {0,3,1}. x=cR+rr=0,1,…,R-1 c=0,1,…,C-1

[0190] For each CCE, mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed by first the frequency domain number of the REs in the REG bundle, and then the REG bundle number that follows the first order, or by first the REG bundle number that follows the first order, and then the frequency domain number of the REs in the REG bundle.

[0191] First, the frequency domain numbers of the REs within the REG bundle are used, followed by the REG bundle numbers that follow the first order. This can be understood as: first, traversing all the frequency domain numbers of the REs within the first REG bundle that follows the first order, and then, for the second REG bundle in the first order, traversing all the frequency domain numbers of the REs within that second REG bundle, until the mapping of all REG bundles in the first order REG bundle numbers is completed.

[0192] The mapping process follows the order of REG bundle numbers, first mapping the first RE within each REG bundle, then mapping the second RE within each REG bundle, and so on, until the last RE within each REG bundle is mapped. The order of the first RE, second RE, ..., last RE corresponds to the order of the frequency domain numbers of the REs within the REG bundle.

[0193] The frequency domain number of a RE refers to the subcarrier index position corresponding to the RE.

[0194] Optionally, REG bundle numbers following the first order mean that the REG bundle numbers are arranged according to the order of the interleaved REG bundles.

[0195] Optionally, the frequency domain mapping is performed according to the order of the interleaved REG bundles. Specifically, it follows the order of the REG bundle numbers, first the RE bundle numbers that follow the first order, then the frequency domain numbers of the REs within each REG bundle: The first RE in each REG bundle is mapped according to the order of the interleaved REG bundles, then the second RE in each REG bundle is mapped, and so on, until the last RE in each REG bundle is mapped. The order of the first RE, second RE, ... last RE is the order of the frequency domain numbers of the REs within the REG bundle.

[0196] Optionally, the frequency domain mapping is performed according to the order of the interleaved REG bundles. Specifically, it is performed by first the frequency domain numbers of the REs within the REG bundle, and then the REG bundle numbers that follow the first order: For the first REG bundle in the order of the interleaved REG bundles, the mapping is performed according to the frequency domain numbers of the REs within the first REG bundle (that is, the mapping of the frequency domain numbers of all REs within the first REG bundle is completed). After the frequency domain mapping of the first REG bundle is completed, the next REG bundle is mapped in the same way as the first REG bundle, until the frequency domain mapping of CCE j is completed.

[0197] Optionally, the mapping method corresponding to Method 2 above includes one of the following:

[0198] The CCE indexes are mapped sequentially in ascending order as follows: For each CCE, the mapping is performed first in the frequency domain and then in the time domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle is used, followed by the REG bundle number that follows the first order; or first, the REG bundle number that follows the first order is used, followed by the frequency domain number of the RE within the REG bundle.

[0199] The CCE indices are mapped sequentially in ascending order as follows: For each CCE, the mapping is performed first in the frequency domain and then in the time domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle is used, followed by the REG bundle number that follows the first order; or first, the REG bundle number that follows the first order is used, followed by the frequency domain number of the RE within the REG bundle.

[0200] The following example further illustrates the mapping method corresponding to Method 2.

[0201] The UE assumes that the modulated complex symbol group is scaled (adjusting the amplitude or power of the signal) and then mapped in the CCE in the order of first frequency domain k and then time domain l.

[0202] by( R = 2, L = 2, n shiftTaking the parameters (=0) as an example, Figure 4 is a second schematic diagram of the REG bundle to CCE mapping provided in the embodiment of this application. Referring to Figure 4, according to the order of CCE index from small to large, CCE 0 is first mapped in the frequency domain and then in the time domain. CCE 1 is mapped in the frequency domain and then in the time domain. The frequency domain mapping is performed according to the frequency domain number of RE in the REG bundle first, followed by the REG bundle number in the first order, or the REG bundle number in the first order first, followed by the frequency domain number of RE in the REG bundle. Figure 5 is a schematic diagram of the third REG bundle to CCE mapping provided in the embodiment of this application. According to the CCE index in ascending order, CCE 0 is first mapped in the time domain and then in the frequency domain. CCE 1 is mapped in the time domain and then in the frequency domain. The frequency domain mapping is performed according to the frequency domain number of the RE in the REG bundle first, followed by the REG bundle number in the first order, or the REG bundle number in the first order first, followed by the frequency domain number of the RE in the REG bundle.

[0203] The PDCCH resource mapping method provided in this application's embodiments maps CCEs in ascending order as follows: For each CCE, mapping is performed either in the frequency domain first, then the time domain, or in the time domain first, then the frequency domain. The frequency domain mapping follows either the frequency domain number of the REs within the REG bundle first, followed by the REG bundle numbers in the first order, or vice versa. This ensures that PDCCH resource mapping is not limited to the frequency domain-first-time domain mapping method, improving the flexibility of PDCCH resource mapping. By considering the CCE number, REG bundle number, and the first order, the complexity of implementing PDCCH resource mapping for terminals and network-side devices is reduced. Especially when the first order is the order of the interleaved REG bundles within the CCE, the steps of sorting REG bundles can be reduced, further reducing the implementation complexity for terminals or network-side devices and meeting the needs of more flexible PDCCH scenarios for 6G.

[0204] Method 3: Map the candidate PDCCH in either the frequency domain first, then the time domain, or the time domain first, then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first, the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number.

[0205] The above mapping method can be understood as follows: the candidate PDCCH is treated as a whole and mapped first in the frequency domain and then in the time domain, or first in the time domain and then in the frequency domain. The frequency domain mapping needs to be performed as follows: first the frequency domain numbers of the REs within the REG bundle, then the REG bundle numbers following the first order, and finally the CCE numbers; or, first the REG bundle numbers following the first order, then the frequency domain numbers of the REs within the REG bundle, and finally the CCE numbers.

[0206] First, the frequency domain numbers of the REs within the REG bundle are processed, then the REG bundle numbers following the first order are processed, and finally the CCE numbers are processed. This can be understood as follows: first, the frequency domain numbers of all REs within the first REG bundle following the first order are traversed, then for the second REG bundle in the first order, the frequency domain numbers of all REs within that second REG bundle are traversed, until the mapping of all REG bundles in the first order is completed, thus completing the mapping of one CCE. The mapping of the next CCE is processed in the same way until the mapping of all CCEs is completed. The mapping order of CCEs is executed according to the order of CCE numbers.

[0207] First, the REG bundle numbers follow the first order, then the frequency domain numbers of the REs within each REG bundle, and finally the CCE numbers. This can be understood as follows: following the first order, the first RE in each REG bundle is mapped, then the second RE in each REG bundle is mapped, and so on, until the last RE in each REG bundle is mapped. The order of the first RE, second RE, ... last RE is the order of the frequency domain numbers of the REs within the REG bundle, thus completing the mapping of one CCE. The mapping of the next CCE is processed in the same way until all CCEs are mapped. The mapping order of CCEs is executed according to the order of their CCE numbers.

[0208] Method 3 includes the following steps:

[0209] Step 1: Determine the REG bundle number corresponding to the resource element RE of the candidate PDCCH and the CCE number corresponding to the resource element RE of the candidate PDCCH;

[0210] Step 2: Sort the CCEs in ascending order of their CCE numbers, and starting with the CCE with the smallest number, map them sequentially as follows:

[0211] Within CCE j, the REG bundles are sorted to obtain a first order, which is related to at least one of the following: REG bundle number; REG bundle size (i.e., L); interleaving size parameter (i.e., R); interleaving function (i.e., f(x)); interleaving offset parameter (i.e., shift index n). shift The number of resource blocks (RBs) contained in the control channel resource set (i.e., the number of CORESETRBs). ); Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

[0212] Optionally, the first order includes one of the following:

[0213] REG bundle numbers are in ascending order;

[0214] REG bundle numbers are ordered from largest to smallest;

[0215] The order of REG bundles after interleaving within CCE.

[0216] In one implementation, the first order is the REG bundle index in ascending or descending order.

[0217] In another implementation, the first order is the order of the REG bundles after interleaving within the CCE, that is, the order of REG bundles{f(6j / L),f(6j / L+1),...,f(6j / L+6 / L-1)} in CCE j, where f() is the interleaving function;

[0218] For example, for R = 2, L = 2, n shift In the case of 0, according to the following interleaving function, the REG bundles contained in CCE 0 are {f(0),f(1),f(2)} = {0,3,1}. x=cR+rr=0,1,…,R-1 c=0,1,…,C-1

[0219] For the entire PDCCH candidate, mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first, the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number.

[0220] The following examples further illustrate the mapping method corresponding to Method 3.

[0221] The UE assumes that after scaling the modulated complex symbol group (adjusting the signal amplitude or power), it maps the candidate PDCCH in either the frequency domain first and then the time domain, or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE in the REG bundle is used, then the REG bundle number following the first order is used, and the candidate PDCCH is mapped in either the frequency domain first and then the time domain first or the time domain first and then the frequency domain; or, the REG bundle number following the first order is used, then the frequency domain number of the RE in the REG bundle is used, and then the frequency domain k is mapped in ascending order of CCE, followed by the time domain l.

[0222] by( R = 2, L = 2, n shift Taking the parameters (=0) as an example, Figure 6 is a schematic diagram of the REG bundle to CCE mapping provided in the embodiment of this application. As shown in Figure 6, the candidate PDCCH is mapped in the manner of first frequency domain and then time domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number. Figure 7 is a schematic diagram of the REG bundle to CCE mapping provided in the embodiment of this application. As shown in Figure 7, the candidate PDCCH is mapped in the manner of first time domain and then frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number.

[0223] It should be noted that in the above embodiments, l represents the symbol index and k represents the subcarrier index.

[0224] The PDCCH resource mapping method provided in this application maps the candidate PDCCH in either a frequency domain-first, time domain-second, or time domain-first, frequency domain-second mapping manner. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first, the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number. This makes PDCCH resource mapping not limited to the frequency domain-first, time domain-second mapping manner, improving the flexibility of PDCCH resource mapping. Furthermore, by considering the CCE number, REG bundle number, and the first order, the complexity of PDCCH resource mapping for terminals and network-side devices is reduced. In particular, when the first order is the order of the interleaved REG bundles within the CCE, the steps of sorting the REG bundles can be reduced, further reducing the implementation complexity of terminals or network-side devices, and meeting the needs of more flexible PDCCH scenarios for 6G.

[0225] When the control channel resource set (CORESET) contains multiple sub-control channel resource sets (sub-CORESET), performance can be improved and implementation complexity reduced by considering flexible PDCCH RE mapping under the TDM CCE or sub-CORESET.

[0226] In some embodiments, when the control channel resource set comprises multiple sub-control channel resource sets, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0227] 1) Mapping is performed sequentially according to the sub-CORESET number in the following manner: For REGs within each sub-control channel resource set, mapping is performed either in the time domain first and then in the frequency domain, or in the frequency domain first and then in the time domain.

[0228] It is understandable that the PDCCH REG within sub-CORESET i is mapped either in the time domain first and then the frequency domain, or vice versa, and then mapped according to the order of the sub-CORESET numbers, for example, in ascending order of the sub-CORESET numbers. Here, i is an integer greater than or equal to 0.

[0229] 2) Mapping is performed sequentially according to the order of the sub-CORESET numbers in the following manner: For each sub-control channel resource set, the REs of the candidate PDCCH are mapped according to the REG bundle number, the CCE number and / or the first order.

[0230] It is understandable that within sub-CORESET i, mapping is performed according to any of the methods mentioned above (method 1, method 2, and method 3), and then mapping is performed according to the order of the sub-CORESET numbers, for example, mapping is performed according to the order of the sub-CORESET numbers from smallest to largest.

[0231] Optionally, for each sub-control channel resource set, the signal mapping of the REs of the candidate PDCCH according to the REG bundle number, the CCE number, and / or the first order includes one of the following:

[0232] 1) For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order;

[0233] For an understanding of this mapping method, please refer to the description of Method 1 in the foregoing embodiments, which will not be repeated here.

[0234] 2) For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0235] For an understanding of this mapping method, please refer to the description of Method 2 in the aforementioned embodiments, which will not be repeated here.

[0236] 3) For each sub-control channel resource set, the candidate PDCCH is mapped in either the frequency domain first, then the time domain, or the time domain first, then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first, the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number.

[0237] For an understanding of this mapping method, please refer to the description of Method 3 in the aforementioned embodiments, which will not be repeated here.

[0238] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0239] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0240] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

[0241] The PDCCH resource mapping method provided in this application improves the flexibility of PDCCH resource mapping when the control channel resource set contains multiple sub-control channel resource sets. In this case, the PDCCH REG in each sub-control channel resource set is mapped in either the time domain first and then the frequency domain or the frequency domain first and then the time domain. Alternatively, in each sub-control channel resource set, the mapping is performed in any of the above methods one, two, and three, and then the mapping is performed in the order of the sub-CORESET numbers. This method can meet the needs of more flexible PDCCH scenarios and reduce the complexity of PDCCH resource mapping for terminal and network-side devices.

[0242] When the control channel resource set (CORESET) contains multiple sub-bands, PDCCH RE mapping, which aggregates the positions of multiple bands, can improve performance and reduce implementation complexity.

[0243] In some embodiments, when the control channel resource set comprises multiple subbands, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0244] 1) Mapping is performed sequentially according to the sub-band numbering order as follows: For REG within each sub-band, mapping is performed either in the time domain first and then in the frequency domain, or in the frequency domain first and then in the time domain.

[0245] It is understandable that the PDCCH REG within sub-band n is mapped in either the time domain first and then the frequency domain, or vice versa, and then mapped according to the order of the sub-band numbers, for example, in ascending order of the sub-band numbers.

[0246] 2) Mapping is performed sequentially according to the order of the sub-band numbers in the following manner: For each sub-band, the REs of the candidate PDCCH are mapped according to the REG bundle number, the CCE number and / or the first order;

[0247] Understandably, within each subband, mapping is performed according to any of the methods mentioned above (method 1, method 2, and method 3), and then mapping is performed according to the order of the sub-band numbers, for example, mapping is performed according to the order of the sub-band numbers from smallest to largest.

[0248] Where n is an integer greater than or equal to 0.

[0249] Optionally, for each subband, the signal mapping of the REs of the candidate PDCCH according to the REG bundle number, the CCE number, and / or the first order includes one of the following:

[0250] 1) For each sub-band, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order;

[0251] For an understanding of this mapping method, please refer to the description of Method 1 in the foregoing embodiments, which will not be repeated here.

[0252] 2) For each sub-band, the CCE numbers are mapped in ascending order as follows: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0253] For an understanding of this mapping method, please refer to the description of Method 2 in the aforementioned embodiments, which will not be repeated here.

[0254] 3) For each sub-band, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number.

[0255] For an understanding of this mapping method, please refer to the description of Method 3 in the aforementioned embodiments, which will not be repeated here.

[0256] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0257] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0258] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

[0259] For an understanding of the second and third orders, please refer to the descriptions in the foregoing embodiments, which will not be repeated here.

[0260] The PDCCH resource mapping method provided in this application, when the control channel resource set contains multiple sub-bands, maps the PDCCH REG of each sub-band in either the time domain first and then the frequency domain or the frequency domain first and then the time domain. Alternatively, for each sub-band, it maps in any of the above methods one, two, and three, and then maps in the order of the sub-band numbers. This improves the flexibility of PDCCH resource mapping, meets the needs of more flexible PDCCH scenarios, and reduces the complexity of PDCCH resource mapping for terminals and network-side devices.

[0261] The PDCCH resource mapping method provided in this application can be executed by a PDCCH resource mapping device. This application uses the execution of the PDCCH resource mapping method by a PDCCH resource mapping device as an example to illustrate the PDCCH resource mapping device provided in this application.

[0262] This application provides a PDCCH resource mapping device. As an example, the PDCCH resource mapping device can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0263] The PDCCH resource mapping device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, etc., such as central processing units (CPUs), microprocessors, digital signal processors (DSPs), artificial intelligence (AI) processors, graphics processing units (GPUs), application-specific integrated circuits (ASICs), network processors (NPs), field-programmable gate arrays (FPGAs), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceivers, pins, circuits, buses, radio frequency units, etc.

[0264] Specifically, referring to Figure 8, when the PDCCH resource mapping device is a terminal or a component in a terminal, or when the PDCCH resource mapping device is a network-side device or a component in a network-side device, the PDCCH resource mapping device 800 includes a processing module 801, used to perform signal mapping on the resource elements RE of the candidate physical downlink control channel PDCCH according to at least one of the following:

[0265] Resource element bundle (REG) number;

[0266] Control Channel Element (CCE) number;

[0267] Sub-CORESET number;

[0268] Sub-band numbering;

[0269] First order;

[0270] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0271] In some embodiments, the first order relates to at least one of the following:

[0272] The REG bundle number;

[0273] REG bundle size;

[0274] Interlacing size parameter;

[0275] Interleaving function;

[0276] Interleaving offset parameters;

[0277] The number of resource blocks (RBs) contained in the control channel resource set;

[0278] Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

[0279] In some embodiments, the signal mapping of resource elements (REs) of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0280] The CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order.

[0281] The CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0282] The candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number.

[0283] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0284] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0285] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

[0286] In some embodiments, when the control channel resource set comprises multiple sub-control channel resource sets, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0287] The mapping is performed sequentially according to the sub-CORESET numbering in the following manner: For each REG in the sub-control channel resource set, the mapping is performed either in the time domain first and then the frequency domain, or in the frequency domain first and then the time domain.

[0288] Mapping is performed sequentially according to the sub-CORESET number in the following manner: For each sub-control channel resource set, the REs of the candidate PDCCH are signal mapped according to the REG bundle number, the CCE number, and / or the first order.

[0289] In some embodiments, the signal mapping of REs for candidate PDCCHs for each sub-control channel resource set according to the REG bundle number, the CCE number, and / or the first order includes one of the following:

[0290] For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order.

[0291] For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0292] For each sub-control channel resource set, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number.

[0293] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0294] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0295] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

[0296] In some embodiments, when the control channel resource set comprises multiple subbands, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following:

[0297] The sub-band numbers are mapped sequentially in the following manner: For each REG within a sub-band, the mapping is performed either in the time domain first and then in the frequency domain, or in the frequency domain first and then in the time domain.

[0298] The mapping is performed sequentially according to the sub-band numbering order as follows: For each sub-band, the REs of the candidate PDCCH are mapped according to the REG bundle number, the CCE number, and / or the first order.

[0299] In some embodiments, the signal mapping of the REs of the candidate PDCCH according to the REG bundle number, the CCE number, and / or the first order for each subband includes one of the following:

[0300] For each sub-band, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order.

[0301] For each sub-band, the CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle.

[0302] For each sub-band, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number.

[0303] The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object;

[0304] The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object;

[0305] The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle. In some embodiments, the first order includes one of the following:

[0306] The REG bundle numbers are in ascending order;

[0307] The REG bundle numbers are in descending order;

[0308] The order of the interleaved REG bundles within the CCE.

[0309] In some embodiments, the second order includes one of the following:

[0310] The REG is ordered from smallest to largest temporal index within the first object;

[0311] The REG is ordered from smallest to largest frequency domain index within the first object;

[0312] The REG is in ascending order of its index within the first object;

[0313] The REGs are ordered from largest to smallest temporal index within the first object;

[0314] The REG is ordered from largest to smallest frequency domain index within the first object;

[0315] The REG is ordered from largest to smallest index within the first object;

[0316] The approach of first time domain and then frequency domain;

[0317] The approach is to first analyze the frequency domain and then the time domain.

[0318] The PDCCH resource mapping device provided in this application embodiment can implement the various processes implemented in the method embodiments of Figures 2 to 7 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0319] As shown in Figure 9, this application embodiment also provides a communication device 900, including a processor 901 and a memory 902. The memory 902 stores a program or instructions that can run on the processor 901. For example, when the communication device 900 is a terminal, the program or instructions executed by the processor 901 implement the various steps of the above-described PDCCH resource mapping method embodiment and achieve the same technical effect. When the communication device 900 is a network-side device, the program or instructions executed by the processor 901 implement the various steps of the above-described PDCCH resource mapping method embodiment and achieve the same technical effect. To avoid repetition, this will not be described again here.

[0320] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG2. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal may be the PDCCH resource mapping device shown in FIG8. Specifically, FIG10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0321] The terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0322] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 1010 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 10 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0323] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processor 10041 and a microphone 10042. The graphics processor 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0324] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1001 can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0325] The memory 1009 can be used to store software programs or instructions, as well as various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0326] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0327] The processor 1010 is configured to perform signal mapping on the resource elements RE of the candidate physical downlink control channel (PDCCH) according to at least one of the following:

[0328] Resource element bundle (REG) number;

[0329] Control Channel Element (CCE) number;

[0330] Sub-CORESET number;

[0331] Sub-band numbering;

[0332] First order;

[0333] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0334] The terminal provided in this application performs signal mapping on the REs of candidate PDCCHs based on at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and a first order. By considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the PDCCH resource mapping is not limited to the frequency domain-first-time domain mapping method, which improves the flexibility of PDCCH resource mapping and can meet the needs of more flexible PDCCH scenarios. Furthermore, by considering at least one of the REG bundle number, CCE number, sub-CORESET number, sub-band number, and the first order, the steps of sorting REG bundles can be reduced, thereby reducing the complexity of PDCCH resource mapping for the terminal and network-side devices.

[0335] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the PDCCH resource mapping method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0336] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG2. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0337] Specifically, this application embodiment also provides a network-side device, which may be the PDCCH resource mapping device shown in FIG11. As shown in FIG11, the network-side device 1100 includes: an antenna 1101, a radio frequency device 1102, a baseband device 1103, a processor 1104, and a memory 1105. The antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the radio frequency device 1102 receives information through the antenna 1101 and sends the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be transmitted and sends it to the radio frequency device 1102. The radio frequency device 1102 processes the received information and transmits it through the antenna 1101.

[0338] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1103, which includes a baseband processor.

[0339] The baseband device 1103 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG11. One of the chips is, for example, a baseband processor, which is connected to the memory 1105 via a bus interface to call the program or instructions in the memory 1105 to execute the network-side device operation shown in the above method embodiment.

[0340] The network-side device may also include a network interface 1106, such as a Common Public Radio Interface (CPRI).

[0341] The processor 1104 is configured to perform signal mapping on the resource elements RE of the candidate physical downlink control channel PDCCH according to at least one of the following:

[0342] Resource element bundle (REG) number;

[0343] Control Channel Element (CCE) number;

[0344] Sub-CORESET number;

[0345] Sub-band numbering;

[0346] First order;

[0347] The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

[0348] In addition, the network-side device 1100 of this application embodiment also includes: a program or instructions stored in the memory 1105 and executable on the processor 1104. The processor 1104 calls the program or instructions in the memory 1105 to execute the methods executed by each module shown in FIG8 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0349] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described PDCCH resource mapping method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0350] The processor mentioned above is either the processor in the terminal described in the above embodiments or the processor in the network-side device. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0351] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described PDCCH resource mapping method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0352] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0353] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described PDCCH resource mapping method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0354] This application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the PDCCH resource mapping method as described above, and the network-side device can be used to execute the steps of the PDCCH resource mapping method as described above.

[0355] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0356] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0357] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A PDCCH resource mapping method, comprising: The communication device performs signal mapping on the resource elements (REs) of the candidate physical downlink control channel (PDCCH) according to at least one of the following: Resource element bundle (REG) number; Control Channel Element (CCE) number; Sub-CORESET number; Sub-band numbering; First order; The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

2. The method according to claim 1, wherein, The first order relates to at least one of the following: The REG bundle number; REG bundle size; Interlacing size parameter; Interleaving function; Interleaving offset parameters; The number of resource blocks (RBs) contained in the control channel resource set; Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

3. The method according to claim 1 or 2, wherein, The signal mapping of resource elements (REs) of candidate physical downlink control channels (PDCCHs) includes one of the following: The CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. The CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. The candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object; The first object includes one of the following: carrier, bandwidth portion BWP, CORESET, candidate PDCCH, CCE, REG bundle.

4. The method according to claim 1 or 2, wherein, When the control channel resource set contains multiple sub-control channel resource sets, the signal mapping of the resource elements RE of the candidate physical downlink control channel PDCCH includes one of the following: The mapping is performed sequentially according to the sub-CORESET numbering in the following manner: For each REG in the sub-control channel resource set, the mapping is performed either in the time domain first and then the frequency domain, or in the frequency domain first and then the time domain. Mapping is performed sequentially according to the sub-CORESET number in the following manner: For each sub-control channel resource set, the REs of the candidate PDCCH are signal mapped according to the REG bundle number, the CCE number, and / or the first order.

5. The method according to claim 4, wherein, For each sub-control channel resource set, the signal mapping of REs for candidate PDCCHs according to the REG bundle number, the CCE number, and / or the first order includes one of the following: For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. For each sub-control channel resource set, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object; The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

6. The method according to claim 1 or 2, wherein, When the control channel resource set contains multiple subbands, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following: The sub-band numbers are mapped sequentially in the following manner: For each REG within a sub-band, the mapping is performed either in the time domain first and then in the frequency domain, or in the frequency domain first and then in the time domain. The mapping is performed sequentially according to the sub-band numbering order as follows: For each sub-band, the REs of the candidate PDCCH are mapped according to the REG bundle number, the CCE number, and / or the first order.

7. The method according to claim 6, wherein, For each subband, the signal mapping of REs for candidate PDCCHs is performed according to the REG bundle number, the CCE number, and / or the first order, including one of the following: For each sub-band, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. For each sub-band, the CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. For each sub-band, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE within the first object, or the frequency domain index of the RE within the first object. Index, RE (Recursive Object) index within the first object; The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

8. The method according to any one of claims 1-7, wherein, The first order includes one of the following: The REG bundle numbers are in ascending order; The REG bundle numbers are in descending order; The order of the interleaved REG bundles within the CCE.

9. The method according to claim 3, 5 or 7, wherein, The second order includes one of the following: The REG is ordered from smallest to largest temporal index within the first object; The REG is ordered from smallest to largest frequency domain index within the first object; The REG is in ascending order of its index within the first object; The REGs are ordered from largest to smallest temporal index within the first object; The REG is ordered from largest to smallest frequency domain index within the first object; The REG is ordered from largest to smallest index within the first object; The approach of first time domain and then frequency domain; The approach is to first analyze the frequency domain and then the time domain.

10. A PDCCH resource mapping device, comprising: The processing module is configured to perform signal mapping on the resource elements (REs) of the candidate physical downlink control channel (PDCCH) according to at least one of the following: Resource element bundle (REG) number; Control Channel Element (CCE) number; Sub-CORESET number; Sub-band numbering; First order; The REG bundle number is the number of the REG bundle corresponding to the RE of the candidate PDCCH; the CCE number is the number of the CCE corresponding to the RE of the candidate PDCCH; the sub-CORESET number is the number of the sub-CORESET corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-control channel resource sets; the sub-band number is the number of the sub-band corresponding to the RE of the candidate PDCCH when the control channel resource set contains multiple sub-bands; the first order is the order of the REG bundles contained in each CCE corresponding to the RE of the candidate PDCCH.

11. The apparatus according to claim 10, wherein, The first order relates to at least one of the following: The REG bundle number; REG bundle size; Interlacing size parameter; Interleaving function; Interleaving offset parameters; The number of resource blocks (RBs) contained in the control channel resource set; Interleaving configuration, which indicates whether the mapping of the REG bundle to CCE is interleaved or non-interleaved.

12. The apparatus according to claim 10 or 11, wherein, The signal mapping of resource elements (REs) of candidate physical downlink control channels (PDCCHs) includes one of the following: The CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. The CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. The candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE in the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE in the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object; The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

13. The apparatus according to claim 10 or 11, wherein, When the control channel resource set contains multiple sub-control channel resource sets, the signal mapping of the resource elements RE of the candidate physical downlink control channel PDCCH includes one of the following: The mapping is performed sequentially according to the sub-CORESET numbering in the following manner: For each REG in the sub-control channel resource set, the mapping is performed either in the time domain first and then the frequency domain, or in the frequency domain first and then the time domain. Mapping is performed sequentially according to the sub-CORESET number in the following manner: For each sub-control channel resource set, the REs of the candidate PDCCH are signal mapped according to the REG bundle number, the CCE number, and / or the first order.

14. The apparatus according to claim 13, wherein, For each sub-control channel resource set, the signal mapping of REs for candidate PDCCHs according to the REG bundle number, the CCE number, and / or the first order includes one of the following: For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. For each sub-control channel resource set, the CCE numbers are mapped in ascending order as follows: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. For each sub-control channel resource set, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object; The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

15. The apparatus according to claim 10 or 11, wherein, When the control channel resource set contains multiple subbands, the signal mapping of the resource elements RE of the candidate physical downlink control channel (PDCCH) includes one of the following: The sub-band numbers are mapped sequentially in the following manner: For each REG within a sub-band, the mapping is performed either in the time domain first and then in the frequency domain, or in the frequency domain first and then in the time domain. The mapping is performed sequentially according to the sub-band numbering order as follows: For each sub-band, the REs of the candidate PDCCH are mapped according to the REG bundle number, the CCE number, and / or the first order.

16. The apparatus according to claim 15, wherein, For each subband, the signal mapping of REs for candidate PDCCHs is performed according to the REG bundle number, the CCE number, and / or the first order, including one of the following: For each sub-band, the CCE numbers are mapped in ascending order as follows: For each CCE, the REG bundles within the CCE are mapped in the first order, and within the REG bundles, the REGs are mapped in the second order or the REs are mapped in the third order. For each sub-band, the CCE numbers are mapped sequentially from smallest to largest in the following manner: For each CCE, the mapping is performed either in the frequency domain first and then the time domain, or in the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first, the frequency domain numbers of the REs within the REG bundle are assigned, followed by the REG bundle numbers that follow the first order; or first, the REG bundle numbers that follow the first order are assigned, followed by the frequency domain numbers of the REs within the REG bundle. For each sub-band, the candidate PDCCH is mapped in either the frequency domain first and then the time domain or the time domain first and then the frequency domain. The frequency domain mapping is performed in one of the following ways: first the frequency domain number of the RE within the REG bundle, then the REG bundle number following the first order, and finally the CCE number; or first the REG bundle number following the first order, then the frequency domain number of the RE within the REG bundle, and finally the CCE number. The second order relates to one of the following: the time-domain index of REG in the first object, the frequency-domain index of REG in the first object, or the index of REG in the first object; The third order is related to one of the following: the time-domain index of the RE in the first object, the frequency-domain index of the RE in the first object, or the index of the RE in the first object; The first object includes one of the following: carrier, BWP, CORESET, candidate PDCCH, CCE, REG bundle.

17. The apparatus according to any one of claims 10-16, wherein, The first order includes one of the following: The REG bundle numbers are in ascending order; The REG bundle numbers are in descending order; The order of the interleaved REG bundles within the CCE.

18. The apparatus according to claim 12, 14 or 16, wherein, The second order includes one of the following: The REG is ordered from smallest to largest temporal index within the first object; The REG is ordered from smallest to largest frequency domain index within the first object; The REG is in ascending order of its index within the first object; The REGs are ordered from largest to smallest temporal index within the first object; The REG is ordered from largest to smallest frequency domain index within the first object; The REG is ordered from largest to smallest index within the first object; The approach of first time domain and then frequency domain; The approach is to first analyze the frequency domain and then the time domain.

19. A communication device comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the PDCCH resource mapping method as claimed in any one of claims 1 to 9.

20. A readable storage medium storing a program or instructions that, when executed by a processor, implement the PDCCH resource mapping method as described in any one of claims 1 to 9.

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