Receiver processing of demodulation reference signals based on two sets of control resources

Abstract

The invention relates to receiver processing of demodulation reference signals based on two sets of control resources. A method for receiver processing of demodulation reference signals based on two sets of control resources of a serving cell is provided. The two sets of control resources include a common set of control resources and another set of control resources. The method is performed by a user equipment and comprises: determining a common reference point for two sets of control resources; determining the same scrambling identifier for the two sets of control resources; based on the common reference point, determining mappings from demodulation reference signal sequences of the two control resource sets to resource elements; performing receiver processing for a physical downlink control channel candidate according to a mapping of a demodulation reference signal sequence to a resource element; and receiving and decoding the physical downlink control channel according to the receiver processing. Also provided are a correspondingly configured user equipment, and a related method for a base station and a base station.

Description

Technical Field

[0001] This disclosure generally relates to wireless communication systems, and more particularly to receiver processing based on demodulation reference signals of two control resource sets. Background Technology

[0002] Wireless communication systems, such as mobile communication systems, are constantly evolving. In early mobile communication systems, such as the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), User Equipment (UE) did not support bandwidth adaptation within the network carrier. This meant that the network carrier provided by the base station (BS) (from the perspective of frequency, such as bandwidth) was the same as the UE carrier and component carriers.

[0003] When 3GPP's fifth-generation (5G) technology was introduced, the concept of Bandwidth Part (BWP) was introduced. This allows the UE to operate only within the limited frequency bandwidth of the network carrier, aiming to improve energy efficiency, support different UE capabilities, allow multiple parallel Radio Resource Control (RRC) configurations (e.g., for different parameter sets), and so on. However, it was observed that there is still room for further improvement. Therefore, the BWP approach can be further developed for 3GPP's sixth-generation (6G) mobile communication concepts and in general for the development of future networks, and the UE can be configured with multiple different and dynamic BWPs.

[0004] Different Base Window (BWP) configurations can overlap and can have different control resource sets (CORESETs) configured for the UE, thus these CORESETs can also overlap. Furthermore, a BWP can have multiple control resource sets configured for the UE, and these control resource sets can also overlap. Each CORESET can have its own demodulation reference signal (DMRS) sequence required by the UE for receiver processing. For example, the UE can perform channel estimation required for coherent detection based on the DMRS. If multiple different CORESETs are configured for the UE, the complexity of the processing to be performed by the UE can increase significantly, especially if the DMRS of each CORESET needs to be processed separately. Summary of the Invention

[0005] According to a first aspect of this disclosure, a method is proposed for receiver processing of demodulation reference signals based on two control resource sets of a serving cell. The two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive physical downlink control channels for acquiring system information carrying cell access-related information. The method is performed by a user equipment and includes: determining a common reference point for the two control resource sets; determining an identical scrambling identifier for the two control resource sets; determining a mapping from demodulation reference signal sequences of the two control resource sets to resource elements based on the common reference point; performing receiver processing for physical downlink control channel candidates in the two control resource sets based on the associated demodulation reference signals determined according to the mapping from demodulation reference signal sequences to resource elements; and receiving and decoding the physical downlink control channels according to the receiver processing.

[0006] In some embodiments, at least two of the two control resource sets overlap at least partially in time and frequency. In some embodiments, receiver processing includes channel estimation processing. In some embodiments, performing receiver processing includes: performing a first channel estimation for overlapping resources of physical downlink control channel candidates for the two control resource sets; and performing a second channel estimation for non-overlapping resources of physical downlink control channel candidates for the two control resource sets. In some embodiments, the same scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling.

[0007] In some embodiments, a common reference point for two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. In some embodiments, this common reference point ensures that all subcarriers in the common resource grid have a non-negative index. In some embodiments, this offset is predefined based on the maximum number of subcarriers supported by network carriers, the maximum number of subcarriers in a frequency range or band, or indicated in the initial configuration information.

[0008] In some embodiments, the common reference point is the lowest subcarrier of the common control resource set. In some embodiments, the mapping of the demodulated reference signal sequence to resource elements is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. In some embodiments, the mapping of the demodulated reference signal sequence to resource elements is defined block-by-block for blocks of multiple demodulated reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index.

[0009] According to a second aspect of this disclosure, a user equipment is proposed. The user equipment is configured for receiver processing of demodulation reference signals based on two control resource sets of a serving cell, wherein the two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive physical downlink control channels for acquiring system information carrying cell access-related information, and the user equipment includes at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the user equipment to at least: determine a common reference point for the two control resource sets; determine the same scrambling identifier for the two control resource sets; determine a mapping of demodulation reference signal sequences to resource elements for the two control resource sets based on the common reference point; perform receiver processing for physical downlink control channel candidates in the two control resource sets based on the associated demodulation reference signals determined according to the mapping of demodulation reference signal sequences to resource elements; and receive and decode the physical downlink control channels according to the receiver processing.

[0010] In some embodiments, at least two of the two control resource sets overlap at least partially in time and frequency. In some embodiments, receiver processing includes channel estimation processing. In some embodiments, to perform receiver processing, at least one processor is configured to perform a first channel estimation for overlapping resources of physical downlink control channel candidates for the two control resource sets; and to perform a second channel estimation for non-overlapping resources of physical downlink control channel candidates for the two control resource sets.

[0011] In some embodiments, the same scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling. In some embodiments, a common reference point for two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. In some embodiments, the common reference point ensures that all subcarriers in the common resource grid have a non-negative index. In some embodiments, the offset is predefined based on the maximum number of subcarriers supported by network carriers, the maximum number of subcarriers in a frequency range or band, or indicated in the initial configuration information.

[0012] In some embodiments, the common reference point is the lowest subcarrier of the common control resource set. In some embodiments, the lower and upper bounds of the demodulated reference signal sequence-to-resource element mapping are determined cyclically, starting from the common reference point, proceeding along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. In some embodiments, the demodulated reference signal sequence-to-resource element mapping is defined block-by-block for blocks of multiple demodulated reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index.

[0013] Depending on the required configuration, the above aspects and features can be implemented in systems, apparatuses, methods, articles of art, and non-transitory computer-readable media. This disclosure can be implemented in and used with various types of devices, including but not limited to any computing device such as cellular phones, tablets, wearable computing devices, portable media players, and various other computing devices.

[0014] The present invention is intended to provide a brief overview of some of the aspects and features of this disclosure. Therefore, it will be understood that the above features are merely illustrative and should not be construed as limiting the scope of this disclosure in any way. Other features, aspects, and advantages of this disclosure will become apparent from the following detailed description, drawings, and claims.

[0015] To facilitate understanding of the terminology used in this disclosure, the following list of the most relevant abbreviations is provided: 3GPP 3rd Generation Partnership Project 5G, the fifth generation 3GPP mobile communication system 6G, the 6th generation 3GPP mobile communication system BS base station BWP bandwidth portion CBW channel bandwidth CCE Control Channel Element CORESET Control Resource Set CN Core Network CSS Public Search Space DCI Downlink Control Information DL downlink eNB LTE base station, E-UTRAN NodeB FFT (Block Rate Fourier Transform) gNB 5G base station, 5G NodeB (also used for 6G base stations) ID identifier MIB (Master Information Block) NG (Next Generation) - NR for new radios PBCH (Physical Broadcast Channel) PCell main cell PDCCH (Physical Downlink Control Channel) PDSCH (Physical Downlink Shared Channel) PRB (Physical Resource Block) PSCells Main and Auxiliary Communities PSS Master Synchronization Signal RB resource block RedCap reduces ability RNTI (Radio Network Temporary Identifier) RRC Radio Resource Control SCell Auxiliary Community SCS Subcarrier Spacing SIB System Information Block SSB Synchronization Signal Block SSS auxiliary synchronization signal TS Technical Specifications UE User Equipment UL uplink USS User-Specific Search Space Attached Figure Description

[0016] A better understanding of this disclosure may be obtained when the following detailed description of various embodiments is considered in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A schematic diagram of an example wireless network is shown.

[0018] Figure 2 A schematic diagram of an example wireless device is shown.

[0019] Figure 3 A schematic diagram of an example network node is shown.

[0020] Figure 4A It presents the general concepts, parameters, and procedures related to receiving CORESET. Figure 4B The structure of CORESET is presented.

[0021] Figure 5A The illustration shows the basic concepts according to this disclosure. Figure 5B The illustrations illustrate the advantages of the basic concepts based on this disclosure.

[0022] Figure 6 This is a flowchart of the basic method according to this disclosure.

[0023] Figure 7 This is a flowchart of receiver processing according to an embodiment.

[0024] Figure 8 A DMRS mapping according to a first embodiment is shown.

[0025] Figure 9 A DMRS mapping according to a second embodiment is shown.

[0026] Figure 10A and 10B A DMRS mapping according to a third embodiment is shown.

[0027] Figure 11 This is a flowchart illustrating a possible process for receiving a PDCCH according to an embodiment. Detailed Implementation

[0028] The examples and embodiments described below are intended to enable those skilled in the art to practice the information disclosed herein. Upon reading the following description with reference to the accompanying drawings, those skilled in the art will understand the described concepts and will recognize the applications of these concepts not specifically addressed herein. It should be understood that these concepts and applications fall within the scope of the description.

[0029] In the following description, numerous specific details are set forth. However, it will be understood that embodiments can be practiced without these specific details. In other instances, well-known circuits, structures, and techniques have not been shown in detail so as not to obscure the understanding of the description. Those skilled in the art will be able to utilize the included description to achieve appropriate functionality without excessive experimentation.

[0030] References to "an embodiment," "an embodiment," "an exemplary embodiment," etc., in the specification indicate that the described embodiment may include specific features, structures, or characteristics, but not every embodiment necessarily includes those specific features, structures, or characteristics. Furthermore, these phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in connection with an embodiment, those skilled in the art will believe that implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether or not clearly and explicitly described) is within the scope of their knowledge.

[0031] As used herein, “multiple” means two or more. As used herein, a “set” of items may include one or more of such items. As used herein, whether in this disclosure or the claims, the terms “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” etc., are to be understood as open-ended, meaning including but not limited to. Only the transitional phrases “consisting of…” and “essentially consisting of…” are closed or semi-closed transitional phrases relating to the claims, respectively. The use of ordinal terms such as “first,” “second,” “third,” etc., used in the claims or this disclosure to modify elements does not in itself indicate priority, order, or the order of one element relative to another, or the chronological order in which the actions of a method are performed, but is merely used as a label to distinguish an element having a certain name from another element having the same name (but used in ordinal terms), to differentiate elements. As used herein, “and / or” and “at least one” (whether or not combined with “or” or “and”) mean that the listed items are alternatives, but these alternatives also include any combination of the listed items. General principles of mobile communication

[0032] Before explaining in detail the examples according to this disclosure, some general principles of wireless communication systems are referenced. Figures 1 to 3 The techniques underlying the described examples are briefly explained to aid understanding. These general principles serve only the purpose of explanation and should not be considered restrictive.

[0033] Figure 1 An example of a wireless network 100 that can be used for wireless communication is shown. The wireless network 100 includes wireless devices such as UEs 110 (e.g., 110A to 110B), network nodes 120 / 130, such as radio access nodes 120 (e.g., 120A-120B, which may be network nodes such as eNBs, gNBs, etc.), which are connected to one or more other network nodes 130 via an interconnection network 125. The network 100 can be used in any suitable deployment scenario. Each of the UEs 110 within the coverage area 115 can be able to communicate directly with the radio access node 120 via a wireless interface or air interface. In some embodiments, the UEs 110 can also be able to communicate with each other via D2D communication.

[0034] As an example, UE 110A can communicate with radio access node 120A via a wireless interface or air interface. That is, UE 110A can send wireless signals to and / or receive wireless signals from radio access node 120A. The wireless signals may contain voice traffic, data traffic, control signals, and / or any other suitable information.

[0035] As used herein, the term "User Equipment" (UE) (e.g., UE 110) has the full breadth of its general meaning and can refer to any type of wireless device capable of communicating with a network node (e.g., network node 120) and / or another UE (e.g., a UE different from UE 110) in a cellular or mobile or wireless communication system. Examples of UEs are target devices, D2D UEs, machine-type UEs or UEs capable of machine-to-machine (M2M) communication, personal digital assistants, tablets, mobile terminals, smartphones, laptop embedded devices (LEEs), laptop devices (LMEs), USB dongles, ProSe UEs, vehicle-to-vehicle (V2V) UEs, V2X UEs, MTC UEs, eMTC UEs, FeMTC UEs, UE Cat 0, UE Cat ML, narrowband IoT (NB-IoT) UEs, UE Cat NB1, mobile terminals (MTs) with integrated access and backhaul (IAB), etc. Example embodiments of UEs will be discussed below. Figure 2 And then described in more detail.

[0036] In some embodiments, the area 115 covered by the radio signal associated with the radio access node 120 may be referred to as a cell. However, particularly with respect to 3GPP 5th or 6th generation mobile communication concepts, beams such as the multicast radio beams (MRBs) described herein may be used within the cell for communication.

[0037] Regarding a beam-based mobile communication system, a radio access node 120 (base station) can transmit beam-shaped signals to a UE 110 in one or more transmit directions (transmit beam, Tx beam). The UE 110 can receive beam-shaped signals from the base station 120 in one or more receive directions (receive beam, Rx beam). The UE 110 can also transmit beam-shaped signals to the base station 120 in one or more directions, and the base station 120 can receive beam-shaped signals from the UE 110 in one or more directions. The base station 120 and the UE 110 can determine the optimal receive and transmit directions for each of the base station / UE pair, for example, in the sense of these directions resulting in the highest link quality or satisfying other quality conditions in the most suitable manner. optimal .

[0038] Interconnection network 125 can refer to any interconnection system capable of transmitting audio, video, signals, data, messages, or any combination thereof. Interconnection network 125 may include all or part of a public switched telephone network (PSTN), a public or private data network, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a local, regional, or global communications or computer network (such as the Internet), a wired or wireless network, a corporate intranet, or any other suitable communications link (including combinations thereof).

[0039] In some embodiments, network node 130 may be a core network node that manages the establishment of communication sessions for UE 110 and various other functions. Examples of network node 130 may include a Mobile Switching Center (MSC), MME, Serving Gateway (SGW), Packet Data Network Gateway (PGW), Operation and Maintenance (O&M), Operations Support System (OSS), SON, location node (e.g., Enhanced Serving Mobile Location Center, E-SMLC), location server node, Minimized Drive Test (MDT) node, etc. UE 110 may use a Non-Access Stratum (NAS) to exchange certain signals with network node 130. In NAS signaling, signals between UE 110 and network node 130 can be transparently transmitted over the radio access network. In some embodiments, radio access node 120 may interact with one or more network nodes 130 through an inter-node interface.

[0040] As used herein, the term "network node" has the full breadth of its general meaning and can correspond to any type of radio access node (e.g., radio network node 120) or any network node that can communicate with a UE and / or another network node in a cellular or mobile or wireless communication system. Examples of network nodes include NodeB, MeNB, SeNB, and network nodes can belong to MCG or SCG, base station (BS), multi-standard radio (MSR) radio access node (such as MSR BS), eNodeB, network controller, radio network controller (RNC), base station controller (BSC), repeater, distributed unit (DU) of integrated access and backhaul (IAB), donor node controlling repeater, base transceiver station (BTS), access point (AP), transmission point, transmission node, RRU, RRH, node in distributed antenna system (DAS), core network node (e.g., MSC, MME, etc.), O&M, OSS, self-organizing network (SON), location node (e.g., E-SMLC), MDT, test equipment, etc. Example embodiments of network nodes will be described below regarding Figure 3 And then described in more detail.

[0041] In some embodiments, network node 120 may be a distributed radio access node. The components of radio access node 120 and their associated functions may be divided into two main units (or sub-radio network nodes), which may be referred to as a central unit (CU) and a distributed unit (DU). Different distributed radio network node architectures are possible. For example, in some architectures, the DU may be connected to the CU via a dedicated wired or wireless link (e.g., fiber optic cable), while in other architectures, the DU may be connected to the CU via a transport network. Furthermore, depending on the chosen architecture, how the functions of radio access node 120 are separated between the CU(s) and DU(s) may vary.

[0042] In some embodiments, the radio access nodes 120 can communicate with each other via terrestrial or other connections. For example, in a 5G / 6G communication system, communication between the radio access nodes 120 can be achieved using the Xn interface connecting the radio access nodes 120.

[0043] Exemplary wireless communication systems are based on an architecture standardized by the 3rd Generation Partnership Project (3GPP). Developments based on 3GPP are generally referred to as Long Term Evolution (LTE) of Universal Mobile Telecommunications System (UMTS) Radio Access Technology (RAT). The various development phases of the 3GPP specification are referred to as releases. Further developments of LTE are generally referred to as Advanced LTE (LTE-A). LTE (LTE-A) employs a radio mobility architecture called Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and a core network called Evolved Packet Core Network (EPC). Base stations in such systems are called Evolved or Enhanced Node Bs (eNBs) and provide E-UTRAN features such as user plane packet data aggregation / radio link control / media access control / physical layer protocols (PDCP / RLC / MAC / PHY) toward communication devices and control plane radio resource control (RRC) protocol termination. Other examples of RATs include services provided by base stations in systems based on technologies such as WLAN and / or Global Microwave Access Interoperability (WiMAX). Base stations can provide coverage for an entire cell or similar radio service area. The core network elements include the Mobility Management Entity (MME), the Serving Gateway (S-GW), and the Packet Gateway (P-GW).

[0044] Examples of suitable communication systems used in this disclosure are, for example, 5G or 6G concepts. The network architecture in such an NR communication system may resemble the network architecture in long-term LTE-A. The base stations in an NR system may be referred to as next-generation node B (gNB). Changes to the network architecture may depend on the need to support various radio technologies and more granular quality of service (QoS) support, as well as some on-demand requirements for QoS levels to support user-perspective quality of experience (QoE). Furthermore, network-aware services and applications, and service and application-aware networks, may also bring changes to the architecture. These are related to information-centric networks (ICNs) and user-centric content delivery networks (UC-CDNs). NR can use multiple-input multiple-output (MIMO) antennas, far more base stations or nodes than LTE (the so-called small cell concept) (including macro sites cooperating with smaller stations), and may also employ various radio technologies for better coverage and enhanced data rates.

[0045] Future networks may leverage Network Functions Virtualization (NFV), a network architecture concept that proposes virtualizing network node functions as "building blocks" or entities that can be operatively connected or linked together to provide services. Virtualized network functions (VNFs) can include one or more virtual machines running computer program code, using standard or general-purpose servers instead of custom hardware. Cloud computing or data storage may also be utilized. In radio communications, this could mean that node operations are performed, at least partially, within servers, hosts, or nodes operatively coupled to a remote radio head. Node operations may also be distributed across multiple servers, nodes, or hosts. It should also be understood that the allocation of labor between core network operations and base station operations may differ from, or even not exist, in LTE.

[0046] Examples of 5G core network (CN) include functional entities (which may be similar in 6G). The CN connects to the UE via the radio access network (RAN). The UPF (User Plane Function), whose role is called PSA (PDU Session Anchor), can be responsible for forwarding frames back and forth between the DN (Data Network) and the tunnel established by 5G to the UE for exchanging services with the data network (DN). The UPF is controlled by the SMF (Session Management Function), which receives policies from the PCF (Policy Control Function). The CN may also include AMF (Access and Mobility Function).

[0047] Generally, all concepts disclosed in this document can be applied to different communication networks, including but not limited to LTE, LTE-A, 5G, 5G Advanced, 6G, and other future or already implemented networks.

[0048] Figure 2This is a schematic diagram of an apparatus for a UE. In one embodiment, the apparatus may include a UE; in yet another embodiment, the apparatus is included in a UE; and in another embodiment, the apparatus is a UE. The apparatus may include a wireless device. The apparatus may include at least one processor 220 and at least one memory 230 storing computer program instructions that, when executed by at least one processor 220, cause the apparatus to perform an embodiment of the UE 110 described herein. In this example, method procedures may also be distributed among at least one processor 220, and not all processors 220 perform all the procedures described herein. UE 110 includes a transceiver 210, a processor 220, a memory 230, and a network interface 240. In some embodiments, the transceiver 210 facilitates the transmission of wireless signals to and from a radio access node 120 (e.g., via a plurality of transmitters (Tx), a plurality of receivers (Rx) 250, and a plurality of antennas). Processor 220 executes instructions to provide some or all of the functions described herein as provided by UE 110, and memory 230 stores the instructions executed by processor 220. In some embodiments, processor 220 and memory 230 form a processing circuit system.

[0049] Processor 220 may include any suitable combination of hardware for executing instructions and manipulating data to perform some or all of the functions of UE 110 described herein. In some embodiments, processor 220 may include, for example, one or more computers, one or more central processing units (CPUs), one or more microprocessors, one or more application-specific integrated circuits (ASICs), one or more field-programmable gate arrays (FPGAs), and / or other logic.

[0050] Memory 230 is generally operable to store instructions, such as computer programs, software, applications including one or more of logic, rules, algorithms, code, tables, etc., and / or other instructions executable by processor 220. Examples of memory 230 include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage media (e.g., hard disk), removable storage media (e.g., optical disc (CD) or digital video disc (DVD)), and / or any other volatile or non-volatile, non-transitory computer-readable and / or computer-executable memory device that stores information, data, and / or instructions that can be used by processor 220 of UE 110. For example, memory 230 includes computer program code that causes processor 220 to perform processing according to the methods described herein.

[0051] Network interface 240 is communicatively coupled to processor 220 and can refer to any suitable device operable to receive input to UE 110, send output from UE 110, perform appropriate processing of input or output or both, communicate with other devices, or perform any combination of the foregoing. Network interface 240 may include appropriate hardware (e.g., port, modem, network interface card, etc.) and software, including protocol conversion and data processing capabilities, for communication over a network.

[0052] Other embodiments of UE 110 may include Figure 2 Additional components beyond those shown herein may be responsible for providing certain aspects of the functionality of the wireless device, including any functionality described herein and / or any additional functionality (including any functionality required to support the mechanisms according to this disclosure). As an example, UE 110 may include input devices and circuitry, output devices, and one or more synchronization elements or circuitry that may be part of processor 220. Input devices include mechanisms for inputting data into UE 110. For example, input devices may include input mechanisms such as a microphone, input element, display, etc. Output devices may include mechanisms for outputting data in audio, video, and / or hardcopy formats. For example, output devices may include speakers, displays, etc.

[0053] In some embodiments, the wireless device UE 110 may include a series of modules configured to implement the functions of the wireless device described herein. Additionally, in some embodiments, the UE 110 may also include components for the functions described herein. A non-transitory computer-readable medium having computer-executable instructions stored thereon may also be provided, which are executed by the processor 220 of the UE 110 to perform the functions as described herein.

[0054] It will be understood that each module can be implemented as a combination of hardware and software, for example... Figure 2 The UE 110 shown includes a processor, memory, and (multiple) transceivers. Some embodiments may also include additional modules to support additional and / or optional functions.

[0055] Figure 3This is a schematic diagram of an example apparatus for a radio access node 120 or a network node 130. The apparatus may include at least one processor 320 and at least one memory 330 storing computer program instructions that, when executed by at least one processor 320, cause the apparatus to perform an embodiment of the core network node 130 or radio access node 120 described herein. In this example, method processes may also be distributed among at least one processor 320, and not all processors 320 perform all processes described herein. The example radio access node 120 or core network node 130 may include one or more of a transceiver 310, a processor 320, a memory 330, and a network interface 340. In some embodiments, the transceiver 310 facilitates the transmission of wireless signals to and from wireless devices, such as a UE 110 (e.g., via multiple transmitters (Tx), multiple receivers (Rx), and multiple antennas). Processor 320 executes instructions to provide some or all of the functions described herein, such as those provided by radio access node 120 or core network node 130, and memory 330 stores the instructions executed by processor 320. In some embodiments, processor 320 and memory 330 form a processing circuit system. Network interface 340 can transmit signals to back-end network components, such as gateways, switches, routers, the Internet, the Public Switched Telephone Network (PSTN), core network nodes, or radio network controllers.

[0056] Processor 320 may include any suitable combination of hardware for executing instructions and manipulating data to perform some or all of the functions described in the description of radio access node 120 or core network node 130, such as those described herein. In some embodiments, processor 320 may include, for example, one or more computers, one or more central processing units (CPUs), one or more microprocessors, one or more application-specific integrated circuits (ASICs), one or more field-programmable gate arrays (FPGAs), and / or other logic.

[0057] Memory 330 is generally operable to store instructions, such as computer programs, software, applications including one or more of logic, rules, algorithms, code, tables, etc., and / or other instructions executable by processor 320. Examples of memory 330 include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage media (e.g., hard disk), removable storage media (e.g., optical disc (CD) or digital video disc (DVD)), and / or any other volatile or non-volatile, non-transitory computer-readable and / or computer-executable memory device that stores information. For example, memory 330 includes computer program code that causes processor 320 to perform processing according to the methods described herein.

[0058] In some embodiments, network interface 340 is communicatively coupled to processor 320 and may refer to any suitable device operable to receive input to radio access node 120 or core network node 130, transmit output from radio access node 120 or core network node 130, perform appropriate processing of input or output or both, communicate with other devices, or perform any combination of the foregoing. Network interface 340 may include suitable hardware (e.g., port, modem, network interface card, etc.) and software, including protocol conversion and data processing capabilities, for communication over a network.

[0059] Other embodiments of radio access node 120 or network node 130 may include Figure 3 Additional components beyond those shown herein may be responsible for providing certain aspects of the node's functionality, including any of the functions described herein and / or any additional functions (including any functions required to support the mechanisms according to this disclosure). Various different types of radio access nodes or core network nodes may include components having the same physical hardware but configured (e.g., via programming) to support different radio access technologies, or may represent partially or completely different physical components.

[0060] Similar to about Figure 3 The processors, interfaces, and memories described may be included in other nodes (such as UE 110, network node 120, etc.). Other nodes may optionally include or exclude wireless interfaces (such as...). Figure 3 (The transceiver described in the text).

[0061] In some embodiments, radio access node 120 or core network node 130 may include a series of modules configured to implement the functions of radio access node 120 or core network node 130 described herein. Additionally, in some embodiments, radio access node 120 or core network node 130 may also include components for implementing the functions described herein. A non-transitory computer-readable medium having computer-executable instructions stored thereon may also be provided, which are executed by processor 320 of network node 120 / 130 to perform the functions as described herein.

[0062] It will be understood that various modules can be implemented as a combination of hardware and software, for example... Figure 3 The processor, memory, and transceiver(s) of the radio access node 120 or core network node 130 shown are illustrated. Some embodiments may also include additional modules to support additional and / or optional functions. General principles of CORESET and DMRS

[0063] Reference Figures 5A to 11 Furthermore, prior to the principles described in this disclosure, some background information regarding CORESET and DMRS will be provided. Figure 4A and Figure 4B And thus provided.

[0064] Figure 4A It presents general concepts, parameters, and procedures related to the reception of CORESET as currently defined, for example, for 5G (e.g., in TS38.101, TS38.211, TS38.331, etc.). Figure 4A The baseline is related to the subcarriers of network carrier 40 (each subcarrier is depicted using a vertical line), i.e. Figure 4A The horizontal axis represents frequency. Twelve subcarriers form a resource block (RB), indicated by a thick vertical line. When UE 110 wants to connect to BS 120 (or a cell created by BS 120), the UE searches for a System Synchronization Block (SSB) from BS 120 and can find SSB 41 at any predefined synchronization grid point in the frequency domain of network carrier 40. SSB 41 may include a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The PBCH carries the Master Information Block (MIB). SSB candidate locations can be set via a synchronization grid (e.g., as specified in TS38.101) for initial access purposes for a PSCell, or can be configured for an SCell. Each valid synchronization grid point can define a candidate location for the midpoint (in frequency) of the SSB.

[0065] In the MIB, UE 110 can find information indicating the location of a common CORESET 43 (e.g., CORESET #0). All UE 110 requires this common CORESET 43 to obtain system information carrying cell access-related information, such as System Information Block 1 (SIB1). A CORESET defines a set of physical resources (e.g., a specific area on the NR downlink resource grid) and a set of parameters used to carry the PDCCH. The CORESET area is confined to a specific region in the frequency domain and limited to 1, 2, or 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain. A CORESET is equivalent to a control area in LTE, the difference being that the control area in LTE spans the entire channel bandwidth (CBW), while a CORESET is confined to each BWP.

[0066] Therefore, CORESET#0 43 is defined relative to—or in other words—with respect to the received SSB 41. In the frequency domain, reference point 42 (which is the first (lowest) subcarrier of CORESET#0 43) can be indicated to UE110 in the MIB, for example, by indicating a gap 401 between the first (lowest) subcarrier of SSB 41 or the generally lowest frequency position and the first subcarrier of CORESET#0 43. This gap can be indicated using two parameters, for example, one parameter for the number of complete RBs between the start of SSB 41 and CORESET#0 43, and another parameter for the number of subcarriers between the start of SSB 41 and CORESET#0 43 (in addition to the number of complete RBs). The first parameter can be represented as RB_offset, and the second parameter is represented as ssb-SubcarrierOffset. In some embodiments, only the second parameter can be indicated (meaning that RB_offset can be omitted, i.e., equal to 0).

[0067] exist Figure 4A In the example, RB_offset is 0 (or not indicated), and ssb-SubcarrierOffse is 7. UE 110 can then determine the location of CORESET#0 43 based on reference point 42. This reference point 42 is also the determining reference point for the DMRS transmitted via CORESET#0. UE 110 can then perform blind decoding in CORESET#0 to find the PDCCH used to acquire SIB1. SIB1 indicates to UE 110 the location of the so-called point A 44. Point A 44 is the fundamental reference point for all resource grids in the frequency domain, the center of subcarrier 0 of the common resource block 0 of the lowest resource grid, and can be outside the bandwidth of network carrier 40. Figure 4AIn the example, point A44 is the first subcarrier of network carrier 40.

[0068] The gap 402 to point A 44 can be indicated to UE 110 via the parameter offsetToPointA, which defines the frequency offset between point A 44 and the lowest subcarrier of the RB overlapping with SSB 41. Alternatively, point A can be indicated as the frequency offset between the lowest subcarrier of CORESET#0 43 (reference point 42) and point A 44. If RB_offset is 0, the alternative is equal. Point A 44 can also be indicated as an absolute frequency point. According to the current 5G definition, point A 44 can be the absolute frequency position in the frequency defined by the offset relative to the lowest subcarrier of the lowest resource block of SSB 41 used by UE 110 for initial cell selection and is signaled in SIB1. The signaling for point A 44 is represented in RBs, assuming a 15 kHz subcarrier spacing for frequency range 1 and a 60 kHz subcarrier spacing for frequency range 2. The parameter offsetToPoint A takes a value between 0 and 2199 (i.e., 12 bits), which is good for SIB1 but may be too large for MIB. Therefore, point A 44 is only indicated in SIB1 and is unknown for UE 110 when monitoring the PDCCH in CORESET#0.

[0069] Based on point A 44, additional CORESETs (or multiple CORESETs) can be configured for UE 110, such as, for example, other CORESETs 45. The positions of CORESETs 43 and 45 (within the resource grid of network carrier 40) are typically aligned with the resource grid of network carrier 40, i.e., the possible starting positions at the first subcarrier of the resource grid's RB. For example... Figure 4A The diagram also shows that multiple CORESETs 43, 45 can overlap in the frequency domain (and time domain), that is, they can appear in (at least partially) overlapping symbols and in (at least partially) overlapping RBs.

[0070] Figure 4B The structure of CORESET is presented in more detail. In this example, CORESET 43 and 45 cover two OFDM symbols. CORESET#0 43 covers 12 RBs, while other CORESET 43s (e.g., CORESET#1, CORESET#2, etc.) cover 36 RBs. These are merely examples and should not be construed as limiting.

[0071] CORESET 43, 45 are divided into multiple Resource Element Groups 46 (REGs). Each REG 46 corresponds to an RB and contains 12 subcarriers in frequency and one OFDM symbol in time. Six REGs 46 form a Control Channel Element 47 (CCE). Each REG 46 is a portion of a CCE, which can carry a PDCCH with its own DMRS 48, where 3 of the 12 subcarriers of the REG 46 (e.g., as shown in the image) are used. Figure 4B Subcarriers 1, 5, and 9 shown carry PDCCH DMRS48. This means that the resource elements of subcarriers 1, 5, and 9 are as follows. Figure 4B It is also shown that the overlapping CORESET 43 and 45 are aligned, that is, the DMRS 48 of REG 46 of both CORESET 43 and 45 will have the same position in the frequency.

[0072] Although the frequency positions may be similar, the DMRS sequences for the two CORESETs 43 and 45 will be different according to the definitions in Clauses 7.4.1.3.1 and 7.4.1.3.2 of TS38.211 v16.2.0, because the mapping of the DMRS sequence to the resource element depends on the reference point considered for CORESETs 43 and 45, which is point 42 for CORESET #0 43 and point 44 for the other CORESETs 45.

[0073] In TS38.211, the DMRS sequence is defined as follows: The UE should assume that it is used for OFDM symbols. Reference signal sequence Defined by the following . Among them, pseudo-random sequence Defined in section 5.2.1. The pseudo-random sequence generator shall be initialized using the following: in It is the OFDM symbol number within the time slot. It is the slot number within the frame, and - From this higher-level parameter pdcch-DMRS-ScramblingID (If provided) Give; Otherwise, .

[0074] Therefore, for the same scrambling identifier The DMRS sequence is identical for different CORESETs 43 and 45. Alternative sequence generation is also conceivable, for example, to produce the same DMRS sequence for different sets of scrambling identifiers.

[0075] However, the resource element mapping for this DMRS sequence is different and depends on the corresponding reference points 42 and 44. This is defined in TS38.211 as follows: The UE should assume the sequence Based on the following mappings to resource elements : The following conditions are met: - If higher level parameters precoderGranularity equal sameAsREG-bundle Then they are within the resource element group that constitutes the PDCCH that the UE attempts to decode; - If higher level parameters precoderGranularity equal allContiguousRBs If so, the UE attempts to decode all resource element groups within the set of consecutive resource blocks in the CORESET of the PDCCH. For k The reference point is: - If CORESET is made by PBCH or by PDCCH-ConfigCommon In IE controlResourceSetZero The field configuration is subcarrier 0 of the lowest-numbered resource block in CORESET; - Otherwise, it is subcarrier 0 in public resource block 0. quantity It is the number of OFDM symbols within a time slot. Antenna port p = 2000. UEs that do not attempt to detect the PDCCH in the CORESET will not make any assumptions about the presence or absence of the DM-RS in the CORESET. In the absence of a CSI-RS configuration, unless otherwise configured, the UE may assume quasi-co-configuration of the PDCCH DM-RS and SS / PBCH blocks with respect to Doppler shift, Doppler spread, average delay, delay spread, and (where applicable) spatial Rx parameters.

[0076] As can be seen, the reference point used to determine the sequence index k is different for CORESET#0 43 (first black dot) and for the other CORESET 45 (second black dot). In other words, although both CORESET 43 and 45 can have the same sequence, the mapping from sequence elements to resource elements (in the frequency direction) is different, which means that the DMRS used for overlapping REGs is also different.

[0077] The different reference points used for mapping DMRS sequences to resource elements arise from the timing at which CORESET#0 43 and other CORESET 45 become known to UE 110. UE 110 needs to know where to find which PDCCH DMRS (i.e., sequences and mappings) for CORESET#0 43 before UE 110 becomes aware of point A 44, which is only known after decoding SIB1. However, in order to receive SIB1, UE 110 must receive and decode the PDCCH for CORESET#0 43. Therefore, point A 44 cannot be used as a reference point for CORESET#0. Furthermore, if UE 110 uses reference point 42 for other CORESET 45, it will be impossible to map DMRS sequences to subcarriers below reference point 42 (i.e., those with negative indices).

[0078] Because CORESETs 43 and 45 have different DMRS sequence-to-resource element mappings, it is not possible to share DMRS among these CORESETs 43 and 45. Sharing DMRS among these CORESETs 43 and 45 is particularly advantageous when the different CORESETs 43 and 45 overlap, i.e., when they at least partially share time and frequency resources. This means that without shared DMRS, UE 110 would need to perform two separate receiver processing (e.g., channel estimation processing) for overlapping CORESETs 43 and 45, which increases the complexity of the UE. Furthermore, certain CORESET configuration options are not feasible for scenarios with overlapping CORESETs 43 and 45. An example of such a scenario is wideband precoding (i.e., when the higher-layer parameter precoderGranularity equals allContiguousRB). In this case, the PDCCH DMRS is currently mapped to all REGs within the set of consecutive RBs in the CORESET that the UE is attempting to decode the PDCCH. The general principles of the solutions in this article

[0079] In detail Figures 5A to 11Previously, it should be noted that all concepts described herein, although described for example for one communication direction (e.g., for downlink communication), also apply to other directions (e.g., in uplink (UL) or sidelink (i.e., communication between UEs) or backhaul (i.e., communication between relay nodes) communication). Furthermore, as will be apparent to those skilled in the art, concepts described for one entity (e.g., UE 110) also apply to another entity (e.g., base station or network node 120) when considering, for example, another communication direction or another network setup.

[0080] Figure 5A The basic concepts according to this disclosure are shown. The general situation is as follows regarding... Figure 4A The description is the same. However, a common reference point 51 for any PDCCH DMRS is introduced. In this disclosure, this reference point may also be referred to as point B. The common reference point 51 is used to define the mapping of DMRS sequences to subcarriers, i.e., the mapping of DMRS sequences to resource elements as previously described. For example, the first element of a DMRS sequence can be mapped to a subcarrier at the common reference point 51 (i.e., to the corresponding resource element covering one subcarrier and one symbol). Based on this mapping, UE 110 determines the DMRS sequence elements to be transmitted on the PDCCH resource and uses them, for example, in channel estimation (for DCI detection). Reference point 51 is defined relative to CORESET#0 43, more precisely, relative to the lowest subcarrier of CORESET#0 43 (i.e., reference point 42).

[0081] To determine the common reference point 51, a first gap 501 (e.g., in terms of the number of subcarriers) can be indicated, which is the distance between reference point 41 and the common reference point 51. This indication includes the transmission of a parameter (e.g., in a MIB) that defines the number of subcarriers of the first gap 501, which defines the absolute position of the common reference point 51, or the parameter can be used to determine the first gap 501 (e.g., because the parameter indicates the gap between the first subcarrier of SSB 41 and the common reference point 41), and / or a predefined first gap 501. This predefined predefined predefined predefined predefined for all network carriers or predefined predefined according to a frequency band or frequency range, etc. Alternatively or additionally, a second gap 502 can be indicated. The indication can also take any form as described above. Although the first gap 501 and the second gap 502 are described as being represented in terms of subcarriers, the actual definition can also be based on the number of resource blocks (with reference subcarrier spacing).

[0082] Point B 51 is known before SIB1 is read (because it is indicated or predefined in the MIB). This means that DMRS may be shared between CORESET #0 43 and other CORESET 45. Point B 51 provides a reference point for the PDCCH DMRS mapping of CORESET 43, 45. In some examples, different reference points may be provided in a later stage of SIB1, such as point A44, for the common RB mesh, and may only be used for the PDSCH DMRS mapping of other CORESET 45.

[0083] Note that the first gap 501 can be 0, and point B 51 can be equal to reference point 42. Point B 51 can be between point A 44 and reference point 42 (e.g., ...). Figure 5A (as shown in the diagram), or point B 51 can be on a (theoretical) subcarrier lower than point A 44, and therefore outside network carrier 40 and outside the common RB resource grid. In some embodiments, point B 51 is designed such that the PDCCH DMRS of CORESET 43, 45 can have non-negative indices on all subcarriers on which they are mapped.

[0084] In some other embodiments, the same DMRS sequence-to-resource element mapping can be applied to PDSCHDMRS. In current 5G mobile communication systems, PDSCH DMRS—similar to PDCCH DMRS—has two reference points in frequency: the lowest subcarrier of CORESET#0 43 (i.e., reference point 42) is the reference point for PDSCH DMRS carrying SIB1, and point A 44 is the reference point for PDSCH DMRS for other scenarios. Therefore, in some embodiments, the common reference point 51 can also be used as the reference point for PDSCH DMRS.

[0085] Figure 5B The illustration illustrates the advantages of the basic concepts according to this disclosure. In this example, UE 110 monitors PDCCH from at least two search spaces, for example, in two CORESETs 43, 45. The timing of monitoring for this search space is associated with the same time slot and even with the same two symbols. The two CORESETs 43, 45 overlap in frequency; for example, CORESET#0 43 is nested within another CORESET 45. In this example, CORESET#0 43 and at least one CORESET 45 other than CORESET#0 43 can be frequency-division multiplexed (FDM-multiplexed) with each other in at least a portion of the frequency domain.

[0086] Figure 5BThe upper half illustrates the current situation for 5G standardization. Both CORESET 43 and 45 will have their own DMRS 48 (DMRS 48-A for CORESET 45 and DMRS 48-A for CORESET#0 43). In the overlapping portion of CORESET 43 and 45, the UE monitoring the CORESET is unsure which DMRS 48 will be transmitted. This depends on whether the transmitted PDCCH is associated with CORESET#0 43 or another CORESET 45. Therefore, UE 110 needs to try both possible DMRS sequence-to-resource element mappings to receive and successfully decode the corresponding PDCCH.

[0087] Figure 5B The lower half of the diagram illustrates the improvement to the solution proposed in this paper. Both CORESET 43 and 45 share the same DMRS sequence-to-resource element mapping and have the same DMRS 48-C. Therefore, regardless of whether the PDCCH belongs to CORESET#0 43 or CORESET 45, the same DMRS 48-C can be used for receiver processing. This is particularly relevant if CORESET 43 and 45 completely overlap (i.e., share the same resources). However, the proposed solution is not only relevant to overlapping scenarios but also reduces the complexity for UE 110 in non-overlapping scenarios and does not require UE 110 to distinguish whether CORESET 43 and 45 overlap. Note that CORESET#0 43 and other CORESET 45 (dedicated to one or more UEs) can be considered as forming a single super-CORESET. In some embodiments, CORESET#0 43 may be a subset of at least the other CORESETs.

[0088] Figure 6 This is a flowchart of a basic method performed by a user equipment (e.g., UE 110) according to this disclosure. This general method takes into account receiver processing based on demodulated reference signals from two control resource sets (e.g., CORESET 43, 45) of the serving cell provided by a base station (e.g., BS 120). Note that the method procedures described herein can generally be reflected in algorithms implemented in the corresponding device and executed by one or more of its processors(s).

[0089] The two control resource sets include a common control resource set 43 and another control resource set 45. The common control resource set 43 is used to receive a physical downlink control channel for acquiring system information carrying cell-related information (e.g., SIB1). In some embodiments, at least two of the two control resource sets 43 and 45 may overlap at least partially in time and frequency.

[0090] In block 61, UE 110 determines a common reference point 51 for the two control resource sets 43, 45. In some embodiments, the common reference point 51 for multiple control resource sets may be determined based on the lowest subcarrier of the common control resource set 43 (e.g., reference point 42) and an offset to that common control resource set 43 (e.g., a first gap 501). In some embodiments, the common reference point 51 may be defined such that all subcarriers in a resource element grid common to the multiple control resource sets have a non-negative index. In some embodiments, the offset 501 may be predefined based on the maximum number of subcarriers supported by network carriers of the mobile communication system (e.g., supported by any possible network carrier 40), based on the maximum number of subcarriers in the frequency range or band of the mobile communication system, or indicated in initial configuration information. Such initial configuration information may, for example, be included in the MIB. In some other embodiments, the common reference point 51 may be the lowest subcarrier of the common control resource set 43.

[0091] In block 62, UE 110 determines the same scrambling identifier for the two control resource sets 43 and 45. Note that in some embodiments, multiple control resource sets may share a common scrambling identifier to ensure the same DMRS sequence. In some embodiments, the common scrambling identifier may be derived from the serving cell's cell identifier (cell ID) and / or from radio resource control signaling. In some other embodiments, multiple control resource sets may not share a common scrambling identifier, but a set of scrambling identifiers that can result in the same DMRS sequence may be defined. Generally, the DMRS sequences of multiple CORESETs may be the same, but in some cases they may be different.

[0092] In box 63, UE 110 determines the mapping of demodulation reference signal sequences to resource elements of the two control resource sets 43, 45 based on a common reference point 51. In the example, the common reference point 51 is determined based on the lowest subcarrier and offset 501 of the common control resource set 43, and the mapping can be determined using the formula currently defined in the 5G standard referenced above.

[0093] In some other examples, where the common reference point 51 is the lowest subcarrier of the common control resource set 43, the mapping of the demodulated reference signal sequence to resource elements can be determined cyclically between lower and upper bound points, starting from the common reference point 51, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point 51. In some embodiments, the lower and upper bound points can be indicated in system information carrying cell access-related information and / or in dedicated radio resource control signaling. In some embodiments, the lower bound point can be the lowest subcarrier of a network carrier (e.g., the current network carrier 40), or the lowest subcarrier of a common resource element grid of multiple control resource sets 43, 45; while the upper bound point can be the highest subcarrier of network carrier 40, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of network carrier 40.

[0094] In some other examples, where the common reference point 51 is also the lowest subcarrier of the common control resource set 43, the mapping of demodulated reference signal sequences to resource elements can be defined block by block for multiple demodulated reference signal sequence elements (i.e., multiple sequence elements of DMRS 48) that are alternately mapped in the direction of increasing and / or decreasing subcarrier indexes. In some embodiments, the block size of the multiple demodulated reference signal sequence elements can be predefined for all network carriers, can be defined by frequency band, can be defined by frequency range, indicated in the main information block, indicated in other system information, and / or indicated in dedicated radio resource control signaling.

[0095] In this embodiment, determining the mapping of the demodulated reference signal sequence to resource elements may include: mapping a first block starting from a common reference point along a direction of increasing subcarrier index; and mapping a subsequent second block starting from the common reference point along a direction of decreasing subcarrier index. This can be repeated, i.e., determining the mapping of the demodulated reference signal sequence to resource elements may also include: mapping a third block starting from the end of the first block along a direction of increasing subcarrier index; and mapping a fourth block starting from the end of the second block along a direction of decreasing subcarrier index.

[0096] In block 64, UE 110 performs receiver processing for physical downlink control channel candidates in two control resource sets 43, 45, based on the associated demodulation reference signal determined according to the mapping from the demodulation reference signal sequence to resource elements. In some embodiments, receiver processing may include channel estimation processing. Detailed examples are provided below regarding... Figure 7 As described. Alternatively or additionally, other processes may be performed based on the DMRS required to receive the PDCCH on CORESET 43 / 45.

[0097] In box 65, UE 110 receives and decodes the physical downlink control channel according to receiver processing. This means that UE 110 can perform blind decoding to decode the received PDDCH (candidate) in one of these CORESETs, for example, by utilizing channel estimation based on the mapping from DMRS sequence to resource element.

[0098] In some embodiments, the method may further include: determining a mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception based on a common reference point; and receiving and decoding the physical downlink shared channel based on this additional demodulation reference signal sequence to resource element mapping. The additional demodulation reference signal sequence to resource element mapping for PDSCH may be the same as that for PDCCH (i.e., the mapping in block 62, for example, because it is mapped to another DMRS sequence, etc.) or different, but the common reference point 51 may be the same.

[0099] Figure 7 This is a flowchart of receiver processing according to one embodiment, where receiver processing includes channel estimation. In this example, UE 110 performs a first channel estimation in block 71 for the overlapping resources of physical downlink control channel candidates for two control resource sets 43 and 45. That is, since the DMRS sequences and the mapping of DMRS sequences to resource elements are the same for both CORESET 43 and 45, the channel estimation based on DMRS sequence elements for multiple PDCCH candidates in the overlapping area of ​​CORESET 43 and 45 can be the same and is performed only once.

[0100] For non-overlapping resources of the physical downlink control channel candidates for two CORESETs 43 and 45, UE 110 performs a second channel estimation in box 72, i.e., then only for the PDCCH candidate of one of CORESETs 43 and 45. Note that the first and second channel estimations can and will likely be the same, as they are based on the same DRMS ​​sequence and common mapping. However, the DRMS ​​sequence used for the non-overlapping area will likely be different (e.g., based on point A44 for CORESET 45, etc.). In this scenario with overlapping CCE candidates, the overlapping CORESETs 43 and 45 do not increase the UE's channel estimation budget (which is finite, as specified, for example, in Table 10.1-3 of TS38.213 v16.2.0).

[0101] Figure 8A DMRS mapping according to a first embodiment is shown, wherein a common reference point 51 for multiple control resource sets is determined based on the lowest subcarrier of a common control resource set 43 and an offset 501 to that common control resource set 43. A rectangular indicator RB is shown on network carrier 40. In this embodiment, reference point B 51 is defined as the lowest subcarrier sufficiently far from CORESET#0 such that k > 0 for all possible CORESET locations within any possible network carrier 40. Figure 8 In the example shown, the common reference point 51 is outside network carrier 40 (or a subcarrier lower than the lowest subcarrier), and point A44 (irrelevant but shown for illustrative purposes only) is the lowest subcarrier of network carrier 40. The first gap 501 can be defined differently.

[0102] For example, the first gap 501 can be defined (normalized, predefined, etc.) according to the maximum number of RBs, which ensures that the common reference point 51 is defined such that all subcarriers in the common resource element grid of multiple control resource sets have non-negative indices. The first gap 501 (e.g., defined in multiple subcarriers) can be 2 × 12 × 275 = 6600 (8k FFT) or 4 × 12 × 275 = 13200 (16k FFT) in some examples.

[0103] In another example, the first gap 501 can be defined (normalized, predefined, etc.) based on the maximum number of RBs for each frequency range or band. Therefore, each frequency range or band (or band group) can have the same first gap 501, such that all subcarriers in a resource element grid common to multiple control resource sets have non-negative indices. In some embodiments, the definition of the first gap 501 (e.g., granularity, range, etc.) can depend on the band, for example, considering the supported minimum or maximum channel bandwidth and / or subcarrier spacing.

[0104] The advantage of this first embodiment is that the determination of the mapping from DMRS sequence to resource element is the same for all CORESETs 43 and 45 (i.e., starting at the same reference point 51), because this reference point is already known after the UE receives SSB 41. For example, when the cell identifier is used for all CORESETs 43 and 45... At that time, the currently standardized DMRS sequence generation and resource mapping can be applied.

[0105] Figure 9 A DMRS mapping according to a second embodiment is shown, where the common reference point 51 is the lowest subcarrier of the common control resource set 43. A rectangular indicator RB is shown on the network carrier 40. Figure 9In the example shown, point A 44 is outside network carrier 40. In the language of the first embodiment, offset 501 would be 0. In this second embodiment, the mapping of the DMRS sequence for CORESET#043 to resource elements follows the rules that are currently standardized and referenced above.

[0106] For CORESET 45, excluding CORESET#0 43, the mapping of DMRS sequences to resource elements can be considered as a loop definition for index mapping of k, based on two points (points C and D) in the frequency. Figure 9 This is under discussion, but it should not be interpreted as restrictive. It is generally noted that in the following alternatives, point D may not be explicitly calculated or determined, but the distance between point C and point D defines the cycle length.

[0107] Typically, in the example of the second embodiment, the reference signal sequence is used for demodulation. and OFDM symbols l To resource elements sequence mapping (in The number of subcarriers for each resource block, and The amplitude scaling factor (used for demodulating the reference signal) can be calculated as follows: For public control resource sets: The reference point used for k is the common reference point 51. For at least one other set of control resources: The reference point used for k is the lower limit point, i.e., point C; E is the offset between the lower limit point and the common reference point 51, expressed in terms of the number of subcarriers; and F is the period length expressed in terms of the number of subcarriers (i.e., the distance between point C and point D).

[0108] In the first alternative, two points in the frequency are obtained from the network carrier configuration indicated via SIB1. Network carrier 40, referred to as an SCS-Specific Carrier in 5G, includes parameters such as offsetToCarrier (the frequency domain offset between point A and the lowest available subcarrier on network carrier 40, expressed in terms of the number of RBs, using the subcarrier spacing defined for that network carrier 40) and carrierBandwidth (expressed in terms of the number of RBs). In the case of multiple mathematical techniques (indicated using scs-SpecificCarrierList), these two points are defined separately for each subcarrier spacing. In this alternative, point C could be the first subcarrier of the currently configured network carrier 40, i.e., point 91. Point 91 could be derived from the offsetToCarrier parameter. Point D could be the last subcarrier of the currently configured network carrier 40, i.e., point 92. Point 92 could be derived from the carrierBandwidth parameter.

[0109] In this example, the shift E is the distance 901 between point 91 and the common reference point 51, which can be determined based on offsetToPointA 402, offsetToCarrier 902, and RB_Offset 903, and the period length F can be obtained directly from the parameter carrierBandwidth and is the distance 904 (all in subcarrier representation).

[0110] For example, offset E can It was determined that the RB_Offset between SSB 41 and CORESET#0 43 is represented in full RB. However, the distance 901 can also be explicitly indicated using another parameter, which may also be represented in the number of RBs, such as offsetToCarrierFromCORESET0, which results in The period length F can It has been confirmed.

[0111] In the second alternative, point A 44, indicated via SIB1, can be considered as point C, i.e., point C = point A 44. The last subcarrier (point 92) of network carrier 40 can be considered as point D. In this alternative, the shift E is a distance of 905, and can It has been determined. The period length F is the distance 907, and it can be... It has been confirmed.

[0112] In the third alternative, point A 44, indicated via SIB1, can be considered as point C, i.e., point C = point A 44. A new information element can be added to SIB1 to indicate point D, i.e., point 93. Point 93 is defined such that it lies on a subcarrier at a higher frequency than the last subcarrier of network carrier 40. In this alternative, offset E is a distance of 905 and can be... It has been determined. The period length F is the distance 907, and it can be reached via... It has been confirmed.

[0113] Figure 10A and 10B The DMRS mapping according to the third embodiment is shown, where the common reference point 51 is the lowest subcarrier of the common control resource set 43. Rectangles shown on network carrier 40 indicate each DMRS sequence element distributed in the frequency. The PDCCH DMRS sequence can be allocated block by block on both sides of the common reference point 51. Two different methods are shown in... Figure 10A and Figure 10B It is shown in the middle.

[0114] exist Figure 10A In the middle, the first block 101 of X1 DMRS elements S (0:X1-1) is assigned to the positive subcarrier index from the common reference point 51 in the positive index direction, and X1 DMRS elements S (X1:2) The next block 102 of X1-1 is assigned to the negative subcarrier index from the common reference point 51 in the negative index direction. Then, the third block 103 can be assigned to the positive subcarrier index after the first block 101 of the DMRS element, and the fourth block 104 is again assigned to the negative subcarrier index after the second block 102, similar to the previous two blocks. This is continued until all subcarriers required for the transmission of CORESET 43, 45, which require the DMRS transmission, have been mapped, for example, until the maximum bandwidth of the mobile communication system.

[0115] exist Figure 10B In the middle, the first block 101 of X1 DMRS elements S (0:X1-1) is assigned to the positive subcarrier index from the common reference point 51 in the positive index direction, and X1 DMRS elements S (X1:2) The next block 102 of X1-1 is assigned to the negative subcarrier index from the common reference point 51, but—unlike Figure 10A—In the positive index direction. Then, the third block 103 can be assigned to the positive subcarrier index after the first block 101 of the DMRS element; and the fourth block 104 is again assigned to the negative subcarrier index after the second block 102, similar to the previous two blocks. This is continued until all subcarriers required for the transmission of CORESET 43, 45 of the DMRS requirement have been mapped, for example, until the maximum bandwidth of the mobile communication system.

[0116] X1 can refer to the length of a PDCCH block, where a continuous allocation of the PDCCH sequence is created. An example case for X1 could be 36, determined based on a total of 12 RBs used for mapping the block and 3 assumed DMRS elements for each RB. X1 can be longer if needed. In some examples, mapping can be performed block-by-block only in that direction if the lowest subcarrier of the mobile communication system (e.g., point A) has already been reached (mapped) in the negative direction, or if the highest subcarrier of network carrier 40 has already been reached (mapped) in the positive direction, and / or subsequently block-by-block sequentially. This is in Figure 10A and 10B Blocks 105 and 106 are shown in the diagram.

[0117] If the common reference point 51 is at the center of the frequency range of network carrier 40, the length of the PDCCH DMRS sequence in the positive index can be represented as X2, and X1 can be determined as X2 / 2. An equal number of negative indices will exist. Negative numbers can also be processed using a cyclic index exceeding the maximum number of positive indices, and the total bandwidth is twice X2. In this example, the rem or mod mathematical operators can be used. If the rem / mod operators are used, the PDCCH DMRS sequence can be assigned at the negative indices in the reverse order compared to the result sequence in the negative number operation described above. The PDCCH DMRS sequence elements in the positive index can be considered as S(0:X2-1), while the PDCCH DMRS sequence elements in the negative index can be considered as S(0:X2-1) starting from the lower end of the frequency range, or (X2-1:0) starting from the common reference point 51 (as already shown). Figure 10A and 10B (Similar to the one shown in the image).

[0118] Figure 11This is a flowchart of a possible process for receiving a PDCCH according to an embodiment. In block 1101, UE 100 searches for and finds SSB 41, and becomes aware of CORESET#0 43 as previously described. In block 1102, UE 110 determines the DMRS index for at least one PDCCH based at least on point B 51. This can be done as previously described for mapping DMRS sequences to resource elements. For example, UE 110 can determine point 42 and its offset to determine point B 51, and map the DMRS sequence to resource elements for all CORESETs 43, 45 according to the common reference point 51 as currently defined in the 5G standard (i.e., the reference point for k is always the common reference point). Alternatively, this determination can be based on points C and D or on X1, as described above.

[0119] In box 1103, UE 110 determines the PDCCH DMRS for at least one PDCCH candidate. UE 110 uses the determined PDCCH DMRS to demodulate the at least one PDCCH candidate in box 1104 and decode the at least one PDCCH candidate in box 1105. If demodulation and decoding are successful, UE 110 will operate according to the received PDCCH (or DCI) (as shown in box 1106). Otherwise, as shown using box 1107, UE 110 will proceed to box 1102.

[0120] In summary, the fundamental principle of the solution proposed in this paper is that the mapping from PDCCH DMRS sequences to resource elements can be based on: • The first subcarrier of CORESET#0 43 and point B 51, which is defined by an offset to the first subcarrier of CORESET#0 43. • The first subcarrier of CORESET#0 43 (which is point B 51), and points C and D. • The first subcarrier of CORESET#0 43 (which is point B 51), and X1 and / or X2. In this embodiment, points B, C, and D can be defined with the help of X1; for example, point B can be X1. B, where B is an integer / real number and can include negative numbers. Furthermore, point D can be X1. D, where the definition of D is similar, and D is an integer / real number.

[0121] Typically, the parameters used to determine points B, C, D, X1, and / or X2 can be specified and signaled via MIB / SIB1. X1 is related to the PDCCH DMRS block length definition and can also be refined through specification. For CORESET 45 with RRC configuration, points B, C, and / or D may also be explicitly indicated. This can be done with respect to CORESET#0 (point 42) via gaps (in subcarriers) indicating to one or more of these points, or with respect to point A 44 via gaps (in subcarriers) indicating to one or more of these points. In cases where the UE 110 is unaware of the location of CORESET#0, that location, or in particular point 42, can be indicated to the UE 110 via RRC. In some examples, the indication can be relative to point A 44.

[0122] The proposed solution allows CORESETs 43 and 45 to share DMRS, particularly for overlapping CORESETs 43 and 45 with different numbers of RBs (e.g., 24 RBs and 96 RBs), different numbers of OFDM symbols (e.g., 1 symbol and 2 symbols), different start symbols, different allocations (e.g., for each CORESET 43 and 45, DMRS are either allocated first in the frequency and then in the symbol, or vice versa), or different repetition schemes. The repetition scheme can, for example, involve repetition on multiple OFDM symbols in multiple time slots in the time domain if there is irregular DMRS allocation from slot to slot in the time domain; depending on the use case, the repeated DMRS symbols can use orthogonal codes or scrambling sequences (e.g., orthogonal codes can generally be used for coverage purposes, and scrambling sequences are used to distinguish DMRS from other time slot symbols, etc.); and / or the scrambling sequences can use cell beam indicator indices for cell-specific separation of the DMRS sequences.

[0123] To enable DMRS sharing, the DMRS index should begin with the same subcarrier (for overlapping CORESETs), which is achieved through a common reference point 51 as described above. The PDCCH DMRS can be configured with the same scrambling identifier for overlapping CORESETs 43 and 45. For CORESET #0 43, the scrambling identifier can be derived from the cell identifier, meaning that if DMRS sequence generation is based on this scrambling identifier, DMRS sharing may require a similar configuration for other CORESETs 43 and 45.

[0124] In addition, if the REG bundles (and / or CCEs) of overlapping CORESETs are aligned in frequency and time, and the overlapping CORESETs are configured with the same precoder granularity (wideband or narrowband), the UE can have a common channel estimate for PDCCH candidates in overlapping CORESETs 43 and 45. Therefore, a single channel estimate can serve CORESET #0 43 and other CORESETs 45. The advantages of the solution proposed in this paper include: reduced specification complexity, reduced UE complexity, enablement of DMRS sharing between any CORESETs 43 and 45, and enablement of time / frequency overlap for any CORESETs 43 and 45.

[0125] The processes described herein may be applied by model or by functional level (identified by identifiers), or across models or functions of a given entity (e.g., as a UE feature). It should be understood that the apparatus described herein may include or be coupled to other elements or modules, such as radio components or radio heads used in or for transmission and / or reception. Although these apparatuses have been described as a single entity, different modules and memories may be implemented in one or more physical or logical entities.

[0126] Note that while embodiments have been described with respect to 6G or 5G, similar principles can be applied to other networks and communication systems. Therefore, although some embodiments have been described above with reference to examples of certain example architectures for wireless networks, technologies, and standards, these embodiments can also be applied to any other suitable communication system besides the communication systems illustrated and described herein.

[0127] It should also be noted that although exemplary embodiments have been described above, several changes and modifications may be made to the disclosed solutions without departing from the scope of this disclosure.

[0128] Generally, various exemplary embodiments can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects of this disclosure can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, but this disclosure is not limited thereto. Although various aspects of this disclosure may be shown and described as block diagrams, flowcharts, or illustrated and described using other graphical representations, it is well understood that, by way of non-limiting example, these blocks, apparatuses, systems, techniques, or methods described herein can be implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0129] The exemplary embodiments of this disclosure can be implemented by computer software executable by a data processor of a mobile device (such as in a processor entity), or by hardware, or by a combination of software and hardware. Computer software or programs (also referred to as program products), including software routines, applets, and / or macros, can be stored in any device-readable data storage medium, and they include program instructions for performing specific tasks. A computer program product may include one or more computer-executable components that are configured to execute the embodiments when the program is run. The one or more computer-executable components may be at least one piece of software code or a portion thereof.

[0130] Furthermore, it should be noted in this regard that any block in the logic flow shown in the accompanying drawings may represent a program process, or interconnected logic circuits, blocks and functions, or a combination of program processes and logic circuits, blocks and functions. Software may be stored on physical media, such as memory chips or memory blocks implemented within a processor, magnetic media (such as hard disks or floppy disks), and optical media (such as, for example, DVDs and their data variants, CDs). The physical media is non-transitory.

[0131] The memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. The data processor can be of any type suitable for the local technical environment and, by way of non-limiting example, can include one or more of the following: general-purpose computer, special-purpose computer, microprocessor, digital signal processor (DSP), application-specific integrated circuit (ASIC), FPGA, gate-level circuit, and processor based on a multi-core processor architecture.

[0132] The exemplary embodiments of this disclosure can be practiced in various components, such as integrated circuit modules. The design of integrated circuits is largely a highly automated process. Complex and powerful software tools can be used to transform logic-level designs into semiconductor circuit designs ready to be etched and formed on a semiconductor substrate.

[0133] Furthermore, based on the foregoing description, the following four sets of clauses reflect possible embodiments of the solutions proposed herein, and these sets of clauses can be further combined. These clauses do not define a scope; the scope is defined only by the appended claims. First set of clauses: 1. A method for demodulation reference signal processing of multiple control resource sets for a serving cell, wherein the multiple control resource sets include: a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels, the method being performed by a user equipment suitable for a mobile communication system and comprising: - Determine a common reference point for multiple control resource sets; - Based on this common reference point, determine the mapping from demodulated reference signal sequences to resource elements for multiple control resource sets; and - Based on the determined mapping from demodulation reference signal sequence to resource elements, receive and decode the physical downlink control channels of multiple control resource sets. 2. The method according to Clause 1, wherein at least two of the plurality of control resource sets overlap at least partially in time and frequency. 3. The method according to Clause 1 or Clause 2, wherein a common reference point for multiple control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to the common control resource set. 4. The method according to Clause 3, wherein a common reference point is defined such that all subcarriers in a common resource element grid of multiple control resource sets have a non-negative index. 5. The method according to Clause 3 or Clause 4, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carriers of the mobile communication system, predefined based on the maximum number of subcarriers in the frequency range or band of the mobile communication system, or indicated in the initial configuration information. 6. The method described in accordance with Clause 1 or Clause 2, wherein the common reference point is the lowest subcarrier of the common control resource set. 7. The method according to Clause 6, wherein the mapping of the demodulated reference signal sequence to the resource element is determined cyclically between the lower and upper bounds, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. 8. The method according to Clause 7, wherein the lower limit point and the upper limit point are indicated in system information carrying cell access-related information and / or in dedicated radio resource control signaling. 9. The method according to Clause 7 or Clause 8, wherein the lower limit point is the lowest subcarrier of the network carrier, or the lowest subcarrier of a resource element grid common to multiple control resource sets; wherein the upper limit point is the highest subcarrier of the network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the network carrier. 10. The method according to Clause 6, wherein the mapping of demodulated reference signal sequence to resource element is defined block by block for a plurality of demodulated reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index. 11. The method according to Clause 10, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated in the main information block, indicated in other system information, and / or indicated in dedicated radio resource control signaling. 12. The method according to Clause 10 or Clause 11, wherein determining the mapping from the demodulated reference signal sequence to the resource element comprises: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 13. The method according to Clause 12, wherein determining the mapping from the demodulated reference signal sequence to the resource element further comprises: - Starting from the end of the first block, map the third block along the direction of increasing subcarrier index; and - Starting from the end of the second block, map the fourth block along the direction of decreasing subcarrier index. 14. The method according to any one of Clauses 1 to 13, wherein multiple control resource sets share a common scrambling identifier. 15. The method according to Clause 14, wherein the public scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling. 16. The method according to any one of clauses 1 to 15, further comprising: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the mapping of an additional demodulation reference signal sequence to resource elements, receive and decode the physical downlink shared channel. 17. A user equipment for a mobile communication system, the user equipment being configured for demodulation reference signal processing of a plurality of control resource sets for a serving cell, wherein the plurality of control resource sets include: a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels, and the user equipment comprising: At least one processor; and At least one memory storing instructions that, when executed by at least one processor, cause the user equipment to at least: - Determine a common reference point for multiple control resource sets; - Based on this common reference point, determine the mapping from demodulated reference signal sequences to resource elements for multiple control resource sets; and - Based on the determined mapping from demodulation reference signal sequence to resource elements, receive and decode the physical downlink control channels of multiple control resource sets. 18. The user equipment as described in Clause 17, wherein at least two of the plurality of control resources are at least partially overlapping in time and frequency. 19. A user equipment as described in Clause 17 or Clause 18, wherein a common reference point for multiple control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. 20. The user equipment as described in Clause 19, wherein a common reference point is defined such that all subcarriers in a common resource element grid of multiple control resource sets have a non-negative index. 21. The user equipment as described in Clause 19 or Clause 20, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carriers of the mobile communication system, predefined based on the maximum number of subcarriers in the frequency range or band of the mobile communication system, or indicated in the initial configuration information. 22. The user equipment as described in Clause 17 or Clause 18, wherein the common reference point is the lowest subcarrier of the common control resource set. 23. The user equipment according to Clause 22, wherein the mapping of the demodulation reference signal sequence to the resource element is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. 24. The user equipment as described in Clause 23, wherein the lower limit point and the upper limit point are indicated in system information carrying cell access-related information and / or in dedicated radio resource control signaling. 25. The user equipment as described in Clause 23 or Clause 24, wherein the lower limit point is the lowest subcarrier of the network carrier, or the lowest subcarrier of a resource element grid common to a plurality of control resource sets; wherein the upper limit point is the highest subcarrier of the network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the network carrier. 26. The user equipment as described in Clause 22, wherein the mapping of demodulation reference signal sequence to resource elements is defined block by block for a plurality of demodulation reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index. 27. The user equipment as described in Clause 26, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated in the main information block, indicated in other system information and / or in dedicated radio resource control signaling. 28. The user equipment according to Clause 26 or Clause 27, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is further configured such that the user equipment at least: - maps a first block starting from a common reference point along a direction of increasing subcarrier index; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 29. The user equipment according to Clause 28, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is further configured such that the user equipment at least: - Starting from the end of the first block, map the third block along the direction of increasing subcarrier index; and - Starting from the end of the second block, map the fourth block along the direction of decreasing subcarrier index. 30. A user equipment according to any one of Clauses 17 to 29, wherein multiple control resource sets share a common scrambling identifier. 31. The user equipment as described in Clause 30, wherein the public scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling. 32. The user equipment according to any one of clauses 17 to 31, wherein the at least one processor is further configured such that the user equipment at least: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the mapping of an additional demodulation reference signal sequence to resource elements, receive and decode the physical downlink shared channel. 33. A method for demodulation reference signal processing of multiple control resource sets for a serving cell, wherein the multiple control resource sets include: a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels, the method being performed by a base station providing a serving cell for a mobile communication system and comprising: - Determine a common reference point for multiple control resource sets; - Based on this common reference point, determine the mapping from demodulated reference signal sequences to resource elements for multiple control resource sets; and - Based on the determined mapping of demodulation reference signal sequence to resource elements, demodulation reference signals for multiple control resource sets are transmitted. 34. The method according to Clause 1, wherein at least two of the plurality of control resource concentrations overlap at least partially in time and frequency. 35. The method according to Clause 33 or Clause 34, wherein a common reference point for multiple control resource sets is defined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. 36. The method according to Clause 35, wherein a common reference point is defined such that all subcarriers in a common resource element grid of multiple control resource sets have a non-negative index. 37. The method according to Clause 35 or Clause 36, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carriers of the mobile communication system, predefined based on the maximum number of subcarriers in the frequency range or band of the mobile communication system, or indicated in the initial configuration information. 38. The method described in accordance with Clause 33 or Clause 34, wherein the common reference point is the lowest subcarrier of the common control resource set. 39. The method according to Clause 38, wherein the mapping of the demodulated reference signal sequence to the resource element is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. 40. The method according to Clause 39, wherein the lower limit and upper limit are indicated to the UE in system information carrying cell access-related information and / or in dedicated radio resource control signaling. 41. The method according to Clause 39 or Clause 40, wherein the lower limit point is the lowest subcarrier of the network carrier, or the lowest subcarrier of a resource element grid common to a plurality of control resource sets; wherein the upper limit point is the highest subcarrier of the network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the network carrier. 42. The method according to Clause 38, wherein the mapping of demodulated reference signal sequence to resource element is defined block by block for a plurality of demodulated reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index. 43. The method according to Clause 42, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated to the user equipment in the main information block, indicated to the user equipment in other system information, and / or indicated to the user equipment in dedicated radio resource control signaling. 44. The method according to Clause 42 or Clause 43, wherein determining the mapping from the demodulated reference signal sequence to the resource element comprises: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 45. The method according to clause 44, wherein determining the mapping from the demodulated reference signal sequence to the resource element further comprises: - Starting from the end of the first block, map the third block along the direction of increasing subcarrier index; and - Starting from the end of the second block, map the fourth block along the direction of decreasing subcarrier index. 46. ​​The method according to any one of clauses 33 to 45, wherein multiple control resource sets share a common scrambling identifier. 47. The method according to Clause 46, wherein the public scrambling identifier is indicated to the user equipment by the cell ID of the serving cell and / or by radio resource control signaling to the user equipment. 48. The method described under any one of clauses 33 to 47 further comprises: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel transmission; and - Based on the mapping of another demodulation reference signal sequence to resource elements, a demodulation reference signal associated with the physical downlink shared channel is transmitted. 49. A base station suitable for a mobile communication system, the base station being configured for demodulation reference signal processing of a plurality of control resource sets of a serving cell provided by the base station, wherein the plurality of control resource sets include: a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels, and further includes: At least one processor; and At least one memory storing instructions that, when executed by at least one processor, cause the base station to at least: - Determine a common reference point for multiple control resource sets; - Based on this common reference point, determine the mapping from demodulated reference signal sequences to resource elements for multiple control resource sets; and - Based on the determined mapping of demodulation reference signal sequence to resource elements, demodulation reference signals for multiple control resource sets are transmitted. 50. A base station as described in Clause 49, wherein at least two of the plurality of control resource clusters overlap at least partially in time and frequency. 51. A base station as described in Clause 49 or Clause 50, wherein a common reference point for multiple control resource sets is defined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. 52. A base station as described in Clause 51, wherein a common reference point is defined such that all subcarriers in a resource element grid common to multiple control resource sets have a non-negative index. 53. A base station as described in Clause 51 or Clause 52, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carriers of the mobile communication system, predefined based on the maximum number of subcarriers in the frequency range or band of the mobile communication system, or indicated in the initial configuration information. 54. A base station as described in Clause 49 or Clause 50, wherein the common reference point is the lowest subcarrier of the common control resource set. 55. The base station according to Clause 54, wherein the mapping of the demodulation reference signal sequence to resource elements is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. 56. The base station as described in Clause 55, wherein the lower limit point and the upper limit point are indicated to the UE in system information carrying cell access-related information and / or in dedicated radio resource control signaling. 57. A base station as described in Clause 55 or Clause 56, wherein the lower limit point is the lowest subcarrier of a network carrier, or the lowest subcarrier of a resource element grid common to a plurality of control resource sets; wherein the upper limit point is the highest subcarrier of a network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the network carrier. 58. The base station according to Clause 54, wherein the mapping of demodulation reference signal sequence to resource element is defined block by block for a plurality of demodulation reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index. 59. The base station as described in Clause 58, wherein the block size of a block of multiple demodulation reference signal sequence elements is indicated to the user equipment in the main information block, in system information carrying cell access-related information, and / or in dedicated radio resource control signaling. 60. A base station according to Clause 58 or Clause 59, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is further configured such that the base station at least: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 61. The base station according to Clause 60, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is further configured such that the base station at least: - Starting from the end of the first block, map the third block along the direction of increasing subcarrier index; and - Starting from the end of the second block, map the fourth block along the direction of decreasing subcarrier index. 62. A base station according to any one of Clauses 49 to 61, wherein multiple control resource sets share a common scrambling identifier. 63. The base station as described in Clause 62, wherein the public scrambling identifier is indicated to the user equipment via the cell ID of the serving cell and / or derived from radio resource control signaling. 64. A base station according to any one of clauses 49 to 63, wherein the at least one processor is further configured to cause the base station to at least: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel transmission; and - Based on the mapping of another demodulation reference signal sequence to resource elements, transmit the modulation reference signal associated with the physical downlink shared channel. Second set of clauses: 1. A method for sequence mapping of demodulation reference signals for multiple control resource sets serving a cell, the method being performed by a user equipment and comprising: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on a common reference point, a mapping from demodulation reference signal sequences to resource elements for multiple control resource sets is determined, wherein this sequence mapping is determined cyclically between lower and upper bounds, starting from the common reference point, proceeding along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point; and - Based on the determined mapping from demodulation reference signal sequence to resource elements, receive and decode the physical downlink control channels of multiple control resource sets. 2. The method according to Clause 1, wherein the plurality of control resource sets include a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 3. The method according to Clause 1 or Clause 2, wherein at least two of the plurality of control resource concentrations overlap at least partially in time and frequency. 4. The method according to any one of Clauses 1 to 3, wherein the lower limit point and the upper limit point are indicated in system information carrying cell access-related information and / or in dedicated radio resource control signaling. 5. The method according to any one of Clauses 1 to 4, wherein the lower limit point is the lowest subcarrier of the network carrier, or the lowest subcarrier of a resource element grid common to multiple control resource sets; wherein the upper limit point is the highest subcarrier of the network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the actual carrier. 6. The method according to any one of clauses 1 to 5, wherein the demodulation reference signal sequence is... and OFDM symbols l To resource elements sequence mapping (in It is the number of subcarriers in each resource block, and The amplitude scaling factor (used for demodulating the reference signal) is calculated as follows: For public control resource sets: The reference point used for k is a common reference point; and For at least one other set of control resources: Where the reference point for k is the lower bound point, E is the shift between the lower bound point and the common reference point in terms of the number of subcarriers, and F is the period length in terms of the number of subcarriers. 7. A user equipment configured for sequence mapping of demodulation reference signals for a plurality of control resource sets serving a cell, and comprising: - At least one processor; and - At least one memory storing instructions that, when executed by at least one processor, cause the user equipment to perform at least the method according to any one of clauses 1 to 6. 8. A method for sequence mapping of demodulation reference signals for multiple control resource sets of a serving cell, the method being performed by a base station providing the serving cell and comprising: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on a common reference point, a mapping from demodulation reference signal sequences to resource elements for multiple control resource sets is determined, wherein this sequence mapping is determined cyclically between lower and upper bounds, starting from the common reference point, proceeding along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point; and - Based on the determined mapping of demodulation reference signal sequence to resource elements, demodulation reference signals for multiple control resource sets are transmitted. 9. The method according to Clause 8, wherein the plurality of control resource sets includes a common control resource set for receiving physical downlink control channels related to obtaining system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 10. The method according to Clause 8 or Clause 9, wherein at least two of the plurality of control resource concentrations overlap at least partially in time and frequency. 11. The method according to any one of Clauses 8 to 10, wherein the lower limit point and the upper limit point are indicated in system information carrying cell access-related information and / or in radio resource control signaling. 12. The method according to any one of Clauses 8 to 11, wherein the lower limit point is the lowest subcarrier of the network carrier, or the lowest subcarrier of a resource element grid common to a plurality of control resource sets; wherein the upper limit point is the highest subcarrier of the network carrier, or another explicitly indicated point of a subcarrier higher than the highest subcarrier of the network carrier. 13. The method according to any one of clauses 8 to 12, wherein the demodulation reference signal sequence is... and OFDM symbols l To resource elements sequence mapping Among them It is the number of subcarriers in each resource block, and The amplitude scaling factor (used for demodulating the reference signal) is calculated as follows: For public control resource sets: The reference point used for k is a common reference point; and For at least one other set of control resources: Where the reference point for k is the lower bound point, E is the shift between the lower bound point and the common reference point in terms of the number of subcarriers, and F is the period length in terms of the number of subcarriers. 14. A base station configured for sequence mapping of demodulation reference signals of a plurality of control resource sets of a serving cell provided by the base station, and comprising: - At least one processor; and - At least one memory storing instructions that, when executed by at least one processor, cause the base station to perform at least the method according to any one of clauses 8 to 13. 15. A computer program product comprising instructions that, when executed by a computer, cause the computer to perform the method described in any one of clauses 1 to 6 or clauses 8 to 13. Third Articles Set: 1. A method for block-by-block sequence mapping of demodulation reference signals for multiple control resource sets serving a cell, the method being performed by a user equipment and comprising: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on this common reference point, a mapping from demodulated reference signal sequences to resource elements for multiple control resource sets is determined, wherein this mapping is defined block-by-block for blocks of multiple demodulated reference signal sequence elements that are alternately mapped in the direction of increasing and / or decreasing subcarrier index; and - Based on the determined mapping from demodulation reference signal sequence to resource elements, receive and decode the physical downlink control channels of multiple control resource sets. 2. The method according to Clause 1, wherein the plurality of control resource sets include a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 3. The method according to Clause 1, wherein at least two of the plurality of control resource sets overlap at least partially in time and frequency. 4. The method according to Clause 1, wherein the block size of the block of the plurality of demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated in the main information block, indicated in other system information, and / or indicated in dedicated radio resource control signaling. 5. The method according to Clause 1, wherein determining the mapping from the demodulated reference signal sequence to the resource element comprises: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 6. The method according to Clause 1, wherein multiple control resource sets share a common scrambling identifier. 7. The method described in Clause 1 further includes: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the determined mapping of additional demodulation reference signal sequences to resource elements, receive and decode the physical downlink shared channel. 8. A user equipment configured for block-by-block sequence mapping of demodulation reference signals for a plurality of control resource sets serving a cell, and comprising: At least one processor; and At least one memory storing instructions that, when executed by at least one processor, cause the user equipment to at least: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on this common reference point, a mapping from demodulated reference signal sequences to resource elements for multiple control resource sets is determined, wherein this sequence mapping is defined block-by-block for blocks of multiple demodulated reference signal sequence elements that are alternately mapped along directions of increasing and / or decreasing subcarrier indices; and - Based on the determined mapping from demodulation reference signal sequence to resource elements, receive and decode the physical downlink control channels of multiple control resource sets. 9. The user equipment as described in Clause 8, wherein the plurality of control resource sets include a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 10. The user equipment as described in Clause 8, wherein at least two of the plurality of control resources in a set overlap at least partially in time and frequency. 11. The user equipment as described in Clause 8, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated in the main information block, indicated in other system information, and / or indicated in dedicated radio resource control signaling. 12. The user equipment according to Clause 8, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is configured such that the user equipment at least: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 13. The user equipment as described in Clause 8, wherein multiple control resource sets share a common scrambling identifier. 14. The user equipment according to Clause 8, wherein the at least one processor is further configured to cause the user equipment to at least: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the mapping of an additional demodulation reference signal sequence to resource elements, receive and decode the physical downlink shared channel. 15. A method for block-by-block sequence mapping of demodulation reference signals for multiple control resource sets serving a cell, the method being performed by a base station serving the cell and comprising: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on this common reference point, a mapping from demodulated reference signal sequences to resource elements for multiple control resource sets is determined, wherein this sequence mapping is defined block-by-block for blocks of multiple demodulated reference signal sequence elements alternately mapped in the direction of increasing and / or decreasing subcarrier index; and - Based on the determined mapping of demodulation reference signal sequence to resource elements, demodulation reference signals for multiple control resource sets are transmitted. 16. The method according to Clause 15, wherein the plurality of control resource sets include a common control resource set for receiving physical downlink control channels related to acquiring system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 17. The method according to Clause 15, wherein at least two of the plurality of control resource concentrations overlap at least partially in time and frequency. 18. The method according to Clause 15, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated to the user equipment in the main information block, indicated to the user equipment in other system information, and / or indicated to the user equipment in dedicated radio resource control signaling. 19. The method according to Clause 15, wherein determining the mapping from the demodulated reference signal sequence to the resource element further comprises: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 20. The method according to Clause 15, wherein multiple control resource sets share a common scrambling identifier. 21. The method described pursuant to Clause 15 further comprises: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the mapping of another demodulation reference signal sequence to resource elements, a demodulation reference signal associated with the physical downlink shared channel is transmitted. 22. A base station configured for block-by-block sequence mapping of demodulation reference signals for a plurality of control resource sets of a serving cell provided by the base station, and comprising: At least one processor; and At least one memory storing instructions that, when executed by at least one processor, cause the base station to at least: - Determine a common reference point for multiple control resource sets, where the common reference point is the lowest subcarrier of the common control resource set; - Based on this common reference point, a mapping from demodulated reference signal sequences to resource elements for multiple control resource sets is determined, wherein this sequence mapping is defined block-by-block for blocks of multiple demodulated reference signal sequence elements that are alternately mapped along directions of increasing and / or decreasing subcarrier indices; and - Based on the determined mapping of demodulation reference signal sequence to resource elements, demodulation reference signals for multiple control resource sets are transmitted. 23. The base station according to Clause 22, wherein the plurality of control resource sets include a common control resource set for receiving physical downlink control channels related to obtaining system information carrying cell access information, and at least one other control resource set for receiving other physical downlink control channels. 24. A base station as described in Clause 22, wherein at least two of the plurality of control resource clusters overlap at least partially in time and frequency. 25. The base station as described in Clause 22, wherein the block size of a block of multiple demodulation reference signal sequence elements is predefined for all network carriers, defined by frequency band, defined by frequency range, indicated to the user equipment in the main information block, indicated to the user equipment in other system information, and / or indicated to the user equipment in dedicated radio resource control signaling. 26. The base station according to Clause 22, wherein, in order to determine the mapping of the demodulated reference signal sequence to resource elements, the at least one processor is configured such that the base station at least: - Starting from a common reference point, map the first block along the direction of increasing subcarrier indexing; and - Starting from the common reference point, map the subsequent second block along the direction of decreasing subcarrier index. 27. A base station as described in Clause 22, wherein multiple control resource sets share a common scrambling identifier. 28. The base station according to Clause 22, wherein the at least one processor is further configured to cause the base station to at least: - Based on a common reference point, determine the mapping of additional demodulation reference signal sequences to resource elements for physical downlink shared channel reception; and - Based on the mapping of another demodulation reference signal sequence to resource elements, a demodulation reference signal associated with the physical downlink shared channel is transmitted. Fourth set of clauses: 1. A method for receiver processing of demodulation reference signals based on two control resource sets of a serving cell, wherein the two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive a physical downlink control channel for acquiring system information carrying cell access-related information, the method being performed by a user equipment and comprising: - Determine a common reference point for the two control resource sets; - Determine the same scrambling identifier for both control resource sets; - Based on a common reference point, determine the mapping from demodulation reference signal sequences of two control resource sets to resource elements; - Based on the associated demodulation reference signal determined according to the mapping from the demodulation reference signal sequence to resource elements, perform receiver processing for physical downlink control channel candidates in two control resource sets; and - Receive and decode the physical downlink control channel according to receiver processing. 2. The method according to Clause 1, wherein at least two of the two control resource sets overlap at least partially in time and frequency. 3. The method according to Clause 1, wherein receiver processing includes channel estimation processing. 4. The method according to Clause 3, wherein performing receiver processing includes: - Perform first channel estimation of overlapping resources for physical downlink control channel candidates for two control resource sets; and - Perform a second channel estimation for non-overlapping resources of physical downlink control channel candidates for two control resource sets. 5. The method according to Clause 1, wherein the same scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling. 6. The method according to Clause 1, wherein the common reference point for the two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to the common control resource set. 7. The method described in Clause 6, wherein the common reference point ensures that all subcarriers in the common resource grid have a non-negative index. 8. The method according to Clause 6, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carrier, predefined based on the maximum number of subcarriers in the frequency range or band, or indicated in the initial configuration information. 9. The method according to Clause 1, wherein the common reference point is the lowest subcarrier of the common control resource set. 10. The method according to Clause 9, wherein the mapping of the demodulated reference signal sequence to the resource element is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point. 11. The method according to Clause 9, wherein the mapping of the demodulation reference signal sequence to resource elements is defined block by block for a plurality of demodulation reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index. 12. A user equipment configured for receiver processing of demodulation reference signals based on two control resource sets of a serving cell, wherein the two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive a physical downlink control channel for acquiring system information carrying cell access-related information, and comprising: At least one processor; and At least one memory storing instructions that, when executed by at least one processor, cause the user equipment to at least: - Determine a common reference point for the two control resource sets; - Determine the same scrambling identifier for both control resource sets; - Based on a common reference point, determine the mapping from demodulation reference signal sequences of two control resource sets to resource elements; - Based on the associated demodulation reference signal determined according to the mapping from the demodulation reference signal sequence to resource elements, perform receiver processing for physical downlink control channel candidates in two control resource sets; and - Receive and decode the physical downlink control channel according to receiver processing. 13. The user equipment as described in Clause 12, wherein at least two of the two control resource sets overlap at least partially in time and frequency. 14. The user equipment as described in Clause 12, wherein receiver processing includes channel estimation processing. 15. The user equipment according to Clause 14, wherein, in order to perform receiver processing, the at least one processor is configured such that the user equipment at least: - Perform a first channel estimate of the overlapping resources for physical downlink control channel candidates from two control resource sets; and - Perform a second channel estimation for non-overlapping resources of physical downlink control channel candidates for two control resource sets. 16. The user equipment as described in Clause 12, wherein the same scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling. 17. The user equipment as described in Clause 12, wherein a common reference point for two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to that common control resource set. 18. The user equipment as described in Clause 17, wherein the common reference point ensures that all subcarriers in the common resource grid have a non-negative index. 19. The user equipment as described in Clause 17, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carrier, predefined based on the maximum number of subcarriers in a frequency range or band, or indicated in the initial configuration information. 20. The user equipment as described in Clause 12, wherein the common reference point is the lowest subcarrier of the common control resource set. 21. The user equipment according to Clause 20, wherein the mapping of the demodulation reference signal sequence to the resource element is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, between the lower limit point and the upper limit point, and ending at a subcarrier lower than the common reference point. 22. The user equipment as described in Clause 20, wherein the mapping of the demodulation reference signal to the resource element is defined block by block for a plurality of demodulation reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index.

[0134] The foregoing description has provided a comprehensive and exhaustive description of exemplary embodiments of the present disclosure by means of non-limiting examples. However, various modifications and adaptations will become apparent to those skilled in the art when read in conjunction with the accompanying drawings and appended claims, given the foregoing description. Nevertheless, all such and similar modifications will still fall within the scope of the present disclosure as defined in the appended claims. Indeed, other embodiments exist, including combinations of one or more embodiments with any of the other embodiments discussed above.

Claims

1. A method for receiver processing of demodulation reference signals based on two control resource sets of a serving cell, wherein the two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive a physical downlink control channel for acquiring system information carrying cell access-related information, the method being performed by a user equipment and comprising: Determine a common reference point for the two control resource sets; Determine the same scrambling identifier for the two control resource sets; Based on the common reference point, the mapping of the demodulation reference signal sequence of the two control resource sets to resource elements is determined; Based on the associated demodulation reference signal determined according to the mapping from the demodulation reference signal sequence to the resource element, receiver processing is performed for physical downlink control channel candidates in the two control resource sets. as well as The physical downlink control channel is received and decoded according to the receiver processing described above.

2. The method of claim 1, wherein at least two of the two control resource sets overlap at least partially in time and frequency.

3. The method of claim 1, wherein the receiver processing includes channel estimation processing.

4. The method of claim 1, wherein the common reference point for the two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to the common control resource set.

5. The method of claim 4, wherein the offset is predefined based on the maximum number of subcarriers supported by the network carrier, predefined based on the maximum number of subcarriers in a frequency range or band, or indicated in the initial configuration information.

6. A user equipment configured for receiver processing of demodulation reference signals based on two control resource sets of a serving cell, wherein the two control resource sets include a common control resource set and another control resource set, the common control resource set being used to receive a physical downlink control channel for acquiring system information carrying cell access-related information, and the user equipment comprising: At least one processor; as well as At least one memory storing instructions that, when executed by the at least one processor, cause the user equipment to at least: Determine a common reference point for the two control resource sets; Determine the same scrambling identifier for the two control resource sets; Based on the common reference point, the mapping of the demodulation reference signal sequence of the two control resource sets to resource elements is determined; Based on the associated demodulation reference signal determined according to the mapping from the demodulation reference signal sequence to the resource element, receiver processing is performed for physical downlink control channel candidates in the two control resource sets. as well as The physical downlink control channel is received and decoded according to the receiver processing described above.

7. The user equipment of claim 6, wherein at least two of the two control resource sets overlap at least partially in time and frequency.

8. The user equipment according to claim 6, wherein the receiver processing includes channel estimation processing.

9. The user equipment of claim 6, wherein the same scrambling identifier is derived from the cell ID of the serving cell and / or from radio resource control signaling.

10. The user equipment of claim 6, wherein the common reference point for the two control resource sets is determined based on the lowest subcarrier of the common control resource set and the offset to the common control resource set.

11. The user equipment of claim 10, wherein the common reference point ensures that all subcarriers in the common resource grid have a non-negative index.

12. The user equipment of claim 10, wherein the offset is predefined according to the maximum number of subcarriers supported by the network carrier, predefined according to the maximum number of subcarriers in a frequency range or band, or indicated in the initial configuration information.

13. The user equipment of claim 6, wherein the common reference point is the lowest subcarrier of the common control resource set.

14. The user equipment of claim 13, wherein the mapping of the demodulation reference signal sequence to the resource element is determined cyclically between a lower limit point and an upper limit point, starting from the common reference point, along the direction of increasing subcarrier index, and ending at a subcarrier lower than the common reference point.

15. The user equipment of claim 13, wherein the mapping of the demodulation reference signal sequence to resource elements is defined block by block for a plurality of demodulation reference signal sequence elements that are alternately mapped along the direction of increasing and / or decreasing subcarrier index.

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