Communication method, apparatus and system

Abstract

The present application provides a communication method, apparatus and system. In the method, a terminal device receives a paging message having been scrambled by using a first sequence, wherein the first sequence is used for scrambling paging messages transmitted by all cells in a region; and the terminal device descrambles the scrambled paging message on the basis of the first sequence. On this basis, paging messages from different cells in a region are all scrambled by using a first sequence. Therefore, when a terminal device in an idle state moves from a camp-on cell to another cell, the terminal device can promptly receive paging from the cell, thereby avoiding the problem of missed paging detection.

Description

Communication methods, devices and systems

[0001] This application claims priority to Chinese Patent Application No. 202411554639.4, filed on October 31, 2024, entitled "Communication Method, Apparatus and System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more particularly to a communication method, apparatus, and system. Background Technology

[0003] In some communication systems, such as 5G, base stations can periodically send Synchronization Signal Blocks (SSBs) to indicate the Physical Cell Identity (PCI) to terminal devices. Based on this, when a base station sends a paging message scrambled with the PCI to a terminal device, the terminal device can descramble the paging message using the PCI to receive it.

[0004] When an idle terminal device moves from cell A to cell B, it needs to obtain the PCI of cell B based on the SSB received from cell B, and then receive paging messages from cell B based on the PCI of cell B. If the terminal device does not receive the SSB of cell B after moving to cell B, it will be unable to receive paging messages from cell B, resulting in missed paging detection. This probability of missed paging detection is even greater when the SSB cycle is long or the terminal device moves quickly, affecting the efficiency of the terminal device accessing the cell. Summary of the Invention

[0005] This application provides a communication method, apparatus, and system.

[0006] Firstly, a communication method is provided, which can be applied to a communication device. This communication device may be, for example, a terminal device, a component configured in the terminal device (such as a chip, chip system, processor, etc.), or a logic module or software capable of implementing all or part of the functions of the terminal device, etc. This application does not limit the scope of the method. For ease of explanation, the following description uses a terminal device as the implementing entity.

[0007] The method includes: a terminal device receiving a paging message scrambled by a first sequence, the first sequence being used to scramble paging messages transmitted in all cells within the area; and then, the terminal device descrambling the scrambled paging message based on the first sequence.

[0008] Based on this, paging messages from different cells within the region are all scrambled using the first sequence. Therefore, when the terminal device moves from the stationary cell to another cell in the idle state, it can receive the paging message from that cell in a timely manner, thereby avoiding the problem of missed paging detection.

[0009] In conjunction with the first aspect described above, in one possible implementation, the first sequence is preset, or the first sequence is determined based on a first initialization seed generated from a first parameter, which may be preset or configured by the network device. When the network device and terminal device perform scrambling and descrambling of paging messages based on the preset first sequence, there is no need to perform the scrambling sequence generation process, reducing the complexity of device processing and improving communication efficiency. When the first sequence is determined based on the first initialization seed generated from the first parameter, the network device and terminal device can each generate the first sequence. In this case, the terminal device can generate the corresponding first sequence in response to the configuration of the network device in the camped cell, achieving flexible communication configuration.

[0010] In conjunction with the first aspect described above, in one possible implementation, the area includes multiple cells.

[0011] In conjunction with the first aspect above, in one possible implementation, the terminal device may receive a first demodulation reference signal (DMRS), which is used to demodulate the physical downlink shared channel (PDSCH) corresponding to all cells in the demodulation area, and the PDSCH carries paging messages.

[0012] Based on the above implementation, the first DMRS is shared by all cells in the area and is used to demodulate the PDSCH carrying the paging message. In other words, the first DMRS is used to demodulate the paging messages of all cells in the area, so that when the terminal device moves from the camped cell to another cell, such as the first cell, in the idle state, it does not need to obtain the PCI of the first cell to receive the first DMRS used to demodulate the PDSCH carrying the paging message, thereby avoiding paging missed detection and achieving accurate reception of paging messages.

[0013] In conjunction with the first aspect described above, in one possible implementation, the first DMRS is preset, or the first DMRS is determined based on a second initialization seed generated by the second parameter, wherein the second parameter is preset or configured by the network device.

[0014] In conjunction with the first aspect above, in one possible implementation, the terminal device may receive downlink control information (DCI) scrambled with a second sequence, which is used to schedule paging messages, and the second sequence is used to scramble the DCI transmitted in all cells within the area.

[0015] Based on the above implementation method, the DCI of the scheduling paging messages from different cells in the region are all scrambled with the second sequence. When the terminal device moves from the stationary cell to another cell in the idle state, it can receive the DCI of that cell in a timely manner and receive the paging message scheduled by that DCI, thereby avoiding the problem of missed paging detection.

[0016] In conjunction with the first aspect above, in one possible implementation, the second sequence is preset, or the second sequence is determined based on a third initialization seed generated by a third parameter, which is either preset or configured by the network device.

[0017] In conjunction with the first aspect above, in one possible implementation, the terminal device may receive a second DMRS, which is used to demodulate the physical downlink control channel (PDCCH) corresponding to all cells in the area, and the PDCCH carries DCI.

[0018] Based on the above implementation, the first network device sends a second DMRS to the terminal device. This second DMRS is shared by all cells in the area and is used to demodulate the PDCCH carrying the DCI. In other words, the second DMRS is used to demodulate the DCI of all cells in the area. This allows the terminal device to receive the second DMRS for demodulating the PDCCH without needing to obtain the PCI of the first cell when moving from its current cell to another cell, such as the first cell, in an idle state. This enables accurate demodulation of the PDCCH based on the second DMRS, and further, scheduling paging messages according to the DCI carried by the PDCCH. By accurately receiving the DCI, paging misses are avoided.

[0019] In conjunction with the first aspect above, in one possible implementation, the second DMRS is preset, or the second DMRS is determined based on a fourth initialization seed generated by the fourth parameter, wherein the fourth parameter is preset or configured by the network device.

[0020] In conjunction with the first aspect described above, in one possible implementation, any of the aforementioned parameters (such as the first, second, third, or fourth parameter) is configured by the network device, including carrying the parameter in a system information block (SIB), SSB, or radio resource control (RRC) signaling. This enables flexible configuration of scrambling.

[0021] In conjunction with the first aspect described above, in one possible implementation, the terminal device can receive paging configuration information for a region. The paging configuration of all cells within this region is the same as indicated by this paging configuration information; that is, all cells within the region share the same paging configuration. Therefore, the terminal device can receive DCI (Distributed Cipher Interface) on the first time-frequency resource configured in the paging configuration information. This DCI is used to schedule paging messages. Thus, when the terminal device moves within the region, since the paging configuration of all cells within the entire region is the same, the problem of missed paging detection is avoided if the terminal device cannot receive the time-frequency resource for determining the paging if it has not received the paging configuration information of the first cell.

[0022] In conjunction with the first aspect described above, in one possible implementation, the terminal device can receive first information from the first cell on a second time-frequency resource. This first information includes information scrambled based on a third sequence or a fourth sequence. The fourth sequence scrambled information includes at least one of the following: a common message for early paging indication, a common message for tracking reference signal (TRS) availability indication, a common message for activating or deactivating discontinuous transmission (DTX), or a common message for activating or deactivating discontinuous reception (DRX). The third sequence is determined by a fifth initialization seed generated based on the PCI of the first cell, and the fourth sequence is determined by a sixth initialization seed generated based on the PCI of the first cell. The second time-frequency resource differs from the first time-frequency resource, and the first cell is located in the aforementioned region. Thus, for any cell within the region, taking the first cell as an example, scrambling non-paging messages or common messages unrelated to paging in the first cell based on the PCI of the first cell facilitates the terminal device's differentiation of common messages sent by different cells, improving the reliability of the communication system.

[0023] In conjunction with the first aspect described above, in one possible implementation, the aforementioned area can be a notification area in radio access network (RNA) or a tracking area (TA). This improves the paging success rate of terminal devices from different cells within the area.

[0024] This application does not limit the number of cells in the area. Generally speaking, the area may include two or more cells.

[0025] Secondly, a communication method is provided, which can be applied to a communication device. This communication device may be, for example, a network device, a component configured within the network device (such as a chip, chip system, processor, etc.), or a logic module or software capable of implementing all or part of the functions of the network device, etc. This application does not limit this. To distinguish it from other network devices in the solution (such as a second network device), this application uses a first network device as the implementing entity for illustration. It is understood that the first network device and the second network device can be the same or different network devices, and the cells corresponding to the first network device and the second network device belong to the same area.

[0026] The method includes: a first network device scrambling a paging message based on a first sequence, the first sequence being used to scramble paging messages transmitted in all cells within the area, and the first network device sending the paging message scrambled by the first sequence.

[0027] In conjunction with the second aspect above, in one possible implementation, the area includes multiple cells.

[0028] In conjunction with the second aspect above, in one possible implementation, the first sequence is preset, or the first sequence is determined based on a first initialization seed generated by a first parameter, wherein the first parameter is preset or configured by a second network device.

[0029] In conjunction with the second aspect above, in one possible implementation, the first network device may send a first DMRS, which is used to demodulate the PDSCH corresponding to all cells in the area, and the PDSCH carries paging messages.

[0030] In conjunction with the second aspect above, in one possible implementation, the first DMRS is preset, or the first DMRS is determined based on a second initialization seed generated by the second parameter, wherein the second parameter is preset or configured by the network device.

[0031] In conjunction with the second aspect above, in one possible implementation, the first network device scrambles the DCI based on the second sequence, whereby the DCI is used to schedule paging messages, and the second sequence is used to scramble the DCI transmitted in all cells within the area. The first network device then sends the DCI scrambled by the second sequence.

[0032] In conjunction with the second aspect above, in one possible implementation, the second sequence is preset, or the second sequence is determined based on a third initialization seed generated by a third parameter, wherein the third parameter is preset or configured by the network device.

[0033] In conjunction with the second aspect above, in one possible implementation, the first network device sends a second DMRS, which is used to demodulate the PDCCH corresponding to all cells in the area, and the PDCCH carries the DCI of the scheduling paging message.

[0034] In conjunction with the second aspect described above, in one possible implementation, the second DMRS is preset, or the second DMRS is determined based on a fourth initialization seed generated from the fourth parameter, wherein the fourth parameter is preset or configured by the network device.

[0035] In conjunction with the second aspect above, in one possible implementation, the first network device sends a first parameter, which is carried in SIB, SSB, or RRC signaling.

[0036] In conjunction with the second aspect above, in one possible implementation, the first network device sends DCI on the first time-frequency resource configured by the paging configuration information of the area. The DCI is used to schedule paging messages, and the paging configuration of all cells in the area is the paging configuration indicated by the paging configuration information.

[0037] In conjunction with the second aspect above, in one possible implementation, the first network device sends paging configuration information for the area.

[0038] In conjunction with the second aspect above, in one possible implementation, first information is transmitted on the second time-frequency resource. The first information includes a third sequence or information scrambled based on a fourth sequence. The fourth sequence scrambled information includes at least one of a common message for paging early indication, a common message for tracking reference signal (TRS) availability indication, a common message for activating or deactivating cell discontinuous transmission (DTX), or a common message for activating or deactivating cell discontinuous reception (DRX). The third sequence is determined based on a fifth initialization seed generated from the PCI of the first cell, and the fourth sequence is determined based on a sixth initialization seed generated from the PCI of the first cell. The second time-frequency resource is different from the first time-frequency resource, and the first cell is located in the aforementioned region.

[0039] For details on the possible implementation methods of the second aspect, please refer to the relevant description in the first aspect, which will not be repeated here.

[0040] Thirdly, this application provides a communication device, including modules or units for implementing the methods of the first aspect, the second aspect, or any of the possible implementations. Specifically, the modules, units, or means can be implemented in software, in hardware, or in a combination of software and hardware.

[0041] Fourthly, this application provides a communication device including one or more processors for executing a computer program (also referred to as code or instructions) in a memory, such that the communication device implements the communication method in the first aspect, the second aspect, or any possible implementation.

[0042] Optionally, the device further includes a memory for storing computer programs and data. The memory is coupled to the processor, which, when executing the computer program stored in the memory, can implement the methods described in the first aspect, the second aspect, or any of the possible embodiments above.

[0043] Optionally, the device further includes a communication interface for communicating with other devices. For example, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0044] Fifthly, this application provides a chip system including at least one processor for supporting the implementation of the functions involved in the first aspect, the second aspect, or any possible implementation described above.

[0045] In one possible design, the chip system also includes a memory for storing computer programs and data, which may be located inside or outside the processor.

[0046] The chip system can consist of chips or include chips and other discrete components.

[0047] In one possible design, the chip system also includes a power supply circuit for supplying power to the chip system.

[0048] In a sixth aspect, this application provides a computer-readable storage medium including a computer program that, when run on a computer, causes the computer to implement the methods of the first aspect, the second aspect, or any possible implementation.

[0049] In a seventh aspect, this application provides a computer program product comprising: a computer program that, when run, causes a computer to perform the methods of the first aspect, the second aspect, or any possible implementation.

[0050] Eighthly, embodiments of this application provide a system including the aforementioned terminal device and network device.

[0051] The second to eighth aspects of this application correspond to the technical solutions of the first aspect of this application. The beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be described again. Attached Figure Description

[0052] Figure 1 is a schematic diagram of the architecture of the communication system provided in an embodiment of this application;

[0053] Figure 2 shows a schematic diagram of the architecture of an access network node;

[0054] Figure 3 is a schematic diagram of a communication architecture provided in this application;

[0055] Figure 4 is a schematic diagram of a random access procedure provided in this application;

[0056] Figure 5 is a schematic diagram of a paging scenario provided in this application;

[0057] Figure 6 is a schematic flowchart of a communication method provided in an embodiment of this application;

[0058] Figure 7 is a schematic flowchart of another communication method provided in an embodiment of this application;

[0059] Figure 8 is a schematic flowchart of another communication method provided in an embodiment of this application;

[0060] Figure 9 is a schematic flowchart of another communication method provided in an embodiment of this application;

[0061] Figure 10 is a schematic block diagram of a possible apparatus provided in an embodiment of this application;

[0062] Figure 11 is a schematic block diagram of a possible apparatus provided in an embodiment of this application. Detailed Implementation

[0063] The technical solution provided in this application will now be described with reference to the accompanying drawings.

[0064] To facilitate understanding of the embodiments of this application, the following points will be explained first:

[0065] First, in this application, the use of prefixes such as "first" and "second" is merely for the purpose of distinguishing and describing different things belonging to the same category, and does not constrain the order, size, or quantity of things. For example, "first sequence" and "second sequence" are simply different sequences, and there is no temporal, size, or priority relationship between them.

[0066] Second, in this application, "send" and "receive" indicate the direction of signal transmission. For example, "send a paging message to a terminal" can be understood as the destination of the information being the terminal, which may include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive a paging message from a network device" can be understood as the source of the information being the network device, which may include direct reception from the network device via the air interface or indirect reception from the network device via the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0067] In other words, sending and receiving can occur between devices, such as between a terminal and a network device; or they can occur within a device, such as between components, modules, chips, software modules, or hardware modules within a device via a bus, wiring, or interface.

[0068] Third, in the embodiments of this application, PDCCH and PDSCH can be understood as physical resources, or as data, signaling, etc. transmitted through these resources. For example, when a network device sends data, such as DCI, through PDCCH, it can also be described as the network device sending PDCCH; when a network device sends data, such as SIB1 or paging messages, through PDSCH, it can also be described as the network device sending PDSCH. Those skilled in the art will understand their meaning. Similar physical resources in this application, such as PUCCH and PUSCH, are similar and will not be described further for the sake of brevity.

[0069] Fourth, the “protocol” involved in the embodiments of this application may refer to standard protocols in the field of communication, such as LTE protocol, NR protocol and related protocols applied to future communication systems, and this application does not limit it.

[0070] The technical solutions provided in this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, sidelink (SL) communication systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) mobile communication systems, or new radio access technology (NR). Among these, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networking. The technical solutions provided in this application can also be applied to future communication systems, such as 6th Generation (6G) mobile communication systems. This application does not limit these applications.

[0071] Figure 1 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in this application. Figure 1 shows a schematic diagram of a possible, non-limiting system architecture. As shown in Figure 1, the communication system 100 includes a radio access network (RAN) 10 and a core network (CN) 20. Optionally, the communication system 100 also includes an Internet 30. The RAN 10 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110) and at least one terminal (120a-120j in Figure 1, collectively referred to as 120). The RAN 10 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal 120 is wirelessly connected to the RAN node 110. The RAN node 110 is wirelessly or wiredly connected to the core network 20. The core network devices in the core network 20 and the RAN node 110 in the RAN 10 can be different physical devices, or they can be the same physical device integrating core network logical functions and radio access network logical functions.

[0072] RAN 10 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or future-oriented evolution systems. RAN 10 can also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. RAN 10 can also be a communication system that integrates two or more of the above systems.

[0073] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, is part of the communication system and is used to help terminals achieve wireless access. Multiple RAN nodes 110 in communication system 100 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminals 120j accessing RAN 10 through network element 120i, network element 120i is a base station; but for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes both referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functions, and network elements 120a-120j can be understood as communication devices with terminal functions.

[0074] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node can be a macro base station (as shown in Figure 1, 110a), a micro base station or indoor station (as shown in Figure 1, 110b), a relay node or donor node, or a radio controller in a CRAN scenario. Optionally, a RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).

[0075] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with each RAN node performing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be separate entities or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0076] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0077] There is an interface between the DU and RU. Depending on the functions of the DU and RU, and / or the different switching methods, the interface between the DU and RU can be a common public radio interface (CPRI) or an enhanced common public radio interface (eCPRI).

[0078] Figure 2 illustrates a schematic diagram of a RAN node architecture. An RAN node includes one or more functional modules for signal processing. As shown in Figure 2, taking physical layer functions as an example, a RAN node includes one or more of the following functions: coding, rate matching, scrambling, modulation, layer mapping, precoding, resource element (RE) mapping, digital beamforming (BF), inverse fast Fourier transformation (IFFT) / adding a cyclic prefix (CP), decoding, rate matching dematching, descrambling, demodulation, inverse discrete Fourier transformation (IDFT), channel equalization (or channel estimation), RE demapping, digital BF, fast Fourier transform (FFT) / CP removal, digital-to-analog (DA) conversion, analog BF, analog-to-digital (AD) conversion, or analog BF.

[0079] One or more of the above functional modules can be implemented through software, hardware, or a combination of both. Physically, they can be discrete or integrated. It is understood that the functional modules described above are merely examples; a RAN node may include more modules (e.g., scheduling module, power control module, hybrid automatic repeat request (HARQ) module, flow control module, mobility management module, or artificial intelligence (AI) module, etc.) depending on its design, or may exclude a certain functional module shown in Figure 2 (e.g., excluding the digital BF module). The RAN node also includes a fronthaul (FH) interface between the DU and RU for communication between them. This fronthaul interface includes, but is not limited to, CPRI or eCPRI. In one possible implementation, the DU is located in the BBU, and the RU is located in the RRU / AAU / RRH; the interface between the BBU and the RRU / AAU / RRH can also be called the fronthaul interface. To implement the fronthaul interface, the BBU and RRU / AAU / RRH can be connected via a fronthaul network, or the DU and RU can be connected via a fronthaul network. For example, fronthaul networks include, but are not limited to: direct fiber optic connections and wavelength division multiplexing (WDM) networks.

[0080] RAN nodes can support one or more types of fronthaul interfaces. Different fronthaul interfaces correspond to DUs and RUs with different functions. As shown in Figure 2, if the fronthaul interface between DU and RU is CPRI, the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between DU and RU is eCPRI, compared to CPRI, some downlink and / or uplink baseband functions are moved from the DU to the RU. Different splitting methods between DU and RU correspond to different types (category, abbreviated as Cat) of eCPRI. Figure 2 shows six examples of eCPRI, represented by Cat A, B, C, D, E, and F (which can also be represented as Option A to F, Option 1 to 6, or other methods). It can be understood that there may be other splitting methods between DU and RU, that is, there may be other types of eCPRI.

[0081] Taking eCPRI Cat A as an example, for downlink transmission, layer mapping is used as the dividing line. DU is configured to implement one or more functions preceding layer mapping (i.e., coding, rate matching, scrambling, modulation, and layer mapping), while other functions following layer mapping (e.g., RE mapping, digital BF, or IFFT / CP addition) are implemented in RU. For uplink transmission, de-RE mapping is used as the dividing line. DU is configured to implement one or more functions preceding de-mapping (i.e., decoding, rate matching de-matching, descrambling, demodulation, IDFT, channel equalization, and de-RE mapping), while other functions following de-mapping (e.g., digital BF or FFT / CP removal) are implemented in RU.

[0082] Similarly, for eCPRI Cat B, Cat C, Cat D, Cat E, and Cat F, different DU and RU segmentation methods are used. The DU handles the segmentation point and the functions before it, while the RU handles the functions after it. The segmentation points for each type of eCPRI are shown in Figure 2 and will not be detailed further. For example, for eCPRI Cat B, RE mapping is used for downlink transmission segmentation, and de-RE mapping is used for uplink transmission segmentation. For uplink transmission, RE mapping and the functions before it are handled by the DU, while the functions after RE mapping and RF functions are handled by the RU. For downlink transmission, de-RE mapping and the functions before it are handled by the DU, while the functions after de-RE mapping and RF functions are handled by the RU.

[0083] The eCPRI segmentation method can be symmetrical for uplink and downlink, as shown in Figure 2 with eCPRI Cat B and Cat C; or, the eCPRI segmentation method can be asymmetrical for uplink and downlink, as shown in Figure 2 with eCPRI Cat A, Cat D, Cat E, and Cat F, without restriction. Optionally, different segmentation methods can be configured for different channels or different channel groups for uplink and / or downlink, i.e., different types of eCPRI can be configured. A channel group can include one or more channels.

[0084] In one possible design, the DU is located in the BBU, and the RU is located in the RRU / AAU / RRH. The processing unit in the BBU used to implement baseband functions is called the Base Band High (BBH) unit, and the processing unit in the RRU / AAU / RRH used to implement baseband functions is called the Base Band Low (BBL) unit.

[0085] For example, as shown in Figure 3, during system startup or reconfiguration, the BBL reports signaling to the BBH via the eCPRI interface to define the processing capacity and conversion rules of channels (such as PUSCH / PDSCH / PDCCH / PUCCH), facilitating the interconnection of DUs and RUs from different vendors. Products from the same vendor also benefit from the decoupling of designs between DUs and RUs. Furthermore, the BBH calculates the BBL's processing capacity margin based on the channel scheduling results within the current processing cycle, and allocates appropriate PDSCH channel processing tasks for the next cycle based on this margin. The processing cycle involved in this step is determined by the design and can be in the millisecond or second range. Further, the BBH notifies the BBL of the allocated PDSCH channel processing tasks for the next cycle via the eCPRI interface. PDSCH channel processing defaults to the partitioning scheme deployed on the BBH to obtain the advantages of a processing resource pool and flexible evolution.

[0086] Optionally, the interaction between BBH and BBL in Figure 3 can be replaced by the interaction between DU and RU.

[0087] A terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0088] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0089] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0090] In the embodiments of this application, the terminal and network device can be hardware devices, or software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal and network device.

[0091] To better understand the methods provided in the embodiments of this application, the terminology used in this application will be introduced below.

[0092] (1) A brief explanation of the cell search process.

[0093] In NR systems, SSBs include, but are not limited to: primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH).

[0094] In an NR system, the SSB occupies 4 orthogonal frequency division multiplexing (OFDM) symbols (0-4). The PSS and SSS each occupy one symbol in the time domain and 127 resource elements (REs) or subcarriers (56-182) in the frequency domain. Specifically, the PSS occupies symbol 0 in the SSB, and the SSS occupies symbol 2 in the SSB.

[0095] The process of cell search based on SSB can be seen in Figure 4. This process may include, but is not limited to, steps S101 to S104.

[0096] Step S101: The terminal device searches for PSS and SSS.

[0097] The terminal device searches for the PSS at several center frequency points where cells may exist, and uses the received signal strength to determine whether cells may exist around the frequency point. It obtains the network identity 1 (NID2) from the PSS and obtains time slot synchronization.

[0098] After time slot synchronization, the terminal device searches the SSS (Server Slots), obtains the network identity 1 (NID1) from the SSS, and achieves frame synchronization. The terminal device determines the PCI (Physical Cell Identifier) ​​of the current cell based on NID1 and NID2. The PCI will be explained in detail below.

[0099] In this step, obtaining time slot synchronization and frame synchronization means that the terminal device has achieved downlink synchronization with the current cell.

[0100] Step S102: Demodulate the reference signal.

[0101] After determining the PCI, the terminal equipment demodulates the reference signal and obtains accurate time slot and frequency synchronization with the cell, and can also perform channel estimation for demodulating the PBCH.

[0102] Step S103: Demodulate PBCH.

[0103] After frame synchronization, the terminal device demodulates the PBCH to obtain the system frame number, bandwidth information, and antenna configuration.

[0104] The PBCH carries limited system information, such as the master information block (MIB). More detailed system information is carried by the SIB. The SIB is carried on the broadcast control channel (BCCH) at the medium access control (MAC) layer and mapped to the physical downlink shared channel (PDSCH) at the physical layer.

[0105] Step S104: Demodulate PDSCH.

[0106] The terminal device receives and demodulates the PDSCH, and reports the resulting SIB to the higher-layer protocol stack, such as the RRC layer. The terminal device continuously receives SIBs and, by parsing them, determines whether the current cell is suitable for camping based on search measurement results, the S criterion, and the R criterion. If the current cell is suitable, the terminal device can camp on that cell. Furthermore, the terminal device can achieve uplink synchronization with the current cell through a random access procedure.

[0107] In NR technology, SIB1 can carry information about accessing or residing in the cell, such as paging-related configuration information. Based on this configuration information, the terminal device can determine the time-frequency resources for the paging message and receive it on those resources. In other words, if the terminal device receives complete system information for a cell, such as SIB1, it can receive paging messages from that cell. This application does not limit the paging message. For example, after a cell search, the base station can use a paging message to instruct the terminal device to initiate random access; or when there are system message updates in the network, the base station can send a paging message to the terminal device to notify it to update the system messages; or the base station can send a paging message to the terminal device when a paging process is triggered to enable communication services.

[0108] (2) Physical Cell Identifier (PCI)

[0109] PCI is used to identify cells at the physical layer. The NR system supports 1088 unique PCIs (0-1007), divided into 336 groups, each containing 3 PCIs. As mentioned earlier, during NR cell search, the terminal device can obtain NID2 by retrieving the PSS and NID1 by retrieving the SSS, thus determining the PCI. NID1 can range from 0 to 335, and NID2 can range from 0 to 2. The network identifier can also be called the network identification code. NID1 can be represented as... NID2 can be represented as

[0110] In one implementation, PCI satisfies the following formula (1):

[0111] Because adjacent cells have different PCIs, the PCI can be used to scramble the common signals / channels of that cell to ensure that the terminal device can identify the common signals / channels transmitted by the currently camped cell. As mentioned earlier, the terminal device can obtain the PCI of the cell from the PSS and SSS in the received SSB. Then, the terminal device can use the PCI to decode the common signals transmitted by that cell. When the terminal device moves to another cell, such as from cell A to cell B, the terminal device needs to obtain the PCI of cell B, such as by receiving the SSB of cell B and obtaining the PCI of that cell from the PSS and SSS in the SSB. Then, it uses this PCI to receive the common signals of cell B.

[0112] Common signals based on PCI scrambling may include, for example, at least one of the following: reference signals, such as DMRS; system messages, such as SIB1; control signaling, such as DCI; and paging messages. Correspondingly, common channels may include PDSCH and / or PDCCH. In NR systems, common signals based on PCI scrambling are described below.

[0113] 1. DMRS for PDSCH:

[0114] The sequence r(n) of DMRS satisfies the following formula (2):

[0115] The initial seed of the pseudo-random sequence c(i) can be determined based on the following formula (3):

[0116] Where l is the OFDM symbol number in the current time slot, It is the sequence number of the current time slot in the system frame. It is the number of symbols in each time slot. Determined based on high-level parameters. It can be instructed by higher-ups, or if no instruction is given by higher-ups... In this case, equal That is, the Physical Layer Cell Identifier (PCI).

[0117] 2. DMRS for PDCCH:

[0118] The sequence r of DMRS of OFDM symbol l l (m) satisfies the following formula (4):

[0119] The initial seed of the pseudo-random sequence c(i) can be determined based on the following formula (5):

[0120] Where l is the OFDM symbol number in the current time slot, It is the sequence number of the current time slot in the system frame. Determined based on high-level parameters. N ID It can be instructed by higher management; if higher management has not instructed N... ID In the case of N ID equal That is, PCI.

[0121] 3. PDSCH

[0122] PDSCH can achieve a maximum of two codewords for transmission. Based on this, the codeword q∈{0,1} in the following text is q=0 when transmitting a single codeword.

[0123] For each codeword q, assume the original bit sequence on the PDSCH is The bit sequence after scrambling is: in, This refers to the number of bits in a codeword transmitted over the physical channel. Bit sequence. The following formula (6) is satisfied:

[0124] Among them, c (q) (i) is the scrambling sequence. The scrambling sequence c (q) (i) The initialization seed can be obtained by initialization based on the following formula (7). C init =n RNTI ·2 15 +q·2 14 +n ID (7)

[0125] Where, n RNTIThis is the radio network temporary identifier (RNTI) associated with the current PDSCH transmission. ID It can be instructed by higher-ups, or if no instruction is given by higher-ups. ID In the case of n ID equal

[0126] 4. PDCCH

[0127] 1) Control resource set (CORESET).

[0128] CORESET is derived from the frequency domain In each resource block and time domain The control-channel element (CCE) consists of six resource-element groups (REGs). A terminal device can be configured with multiple CORESETs. Each CORESET is associated with only one CCE-to-REG mapping. The CCE-to-REG mapping can be interleaved or uninterleaved and is described by resource-element bundles:

[0129] A resource element bundle i is defined as REGs{iL,iL+1,…,iL+L-1}, where L is the size of the resource element bundle. And the number of REGs in CORESET

[0130] CCE consists of a resource element bundle {f(6j / L),f(6j / L+1),…,f(6j / L+6 / L-1)}, where f(·) is an interleaver.

[0131] For a non-interleaved CCE to REG mapping, L = 6 and f(x) = x.

[0132] For interleaved CCE to REG mapping, When L∈{2,6}; hour, The interleaver satisfies the following formula (8):

[0133] Where R∈{2,3,6}. shift It can be instructed by higher-ups, or if no instruction is given by higher-ups. shift In the case of n shift equal

[0134] In NR systems, PDCCH can be transmitted within the frequency domain range specified in CORESET.

[0135] 2) PDCCH scrambling

[0136] Assume the original bit sequence b(0),…,b(M) bit -1), the bit sequence after scrambling the scrambling sequence is: Among them, M bit This refers to the number of bits transmitted over the physical channel. Bit sequence. It satisfies the following formula (9):

[0137] Where c(i) is the scrambling sequence. The scrambling sequence c(i) can be initialized based on the following formula (10) to obtain the initialization seed. init =(n RNTI ·2 16 +n ID mod2 31 (10)

[0138] Where, n TNTI This is the RNTI associated with the current PDSCH transmission. ID It can be instructed by higher-ups, or if no instruction is given by higher-ups. ID In the case of n ID equal

[0139] In this application embodiment, the initialization seed may also be called the initialization value or the initial value, and this application does not limit it.

[0140] Figure 5 is a schematic diagram of a paging scenario provided by an embodiment of this application. Referring to Figure 5, the TA includes multiple cells covered by network devices, and any cell in the TA can initiate a paging to an idle terminal device. When searching for a cell, the terminal device can obtain the PCI of cell A from the SSB of cell A (i.e., the stationary cell) based on the process shown in Figure 4 above. Then, it can determine the scrambling sequence of the paging message based on the PCI of cell A, and descramble the paging message from cell A. When the idle terminal device moves from cell A to cell B, it needs to receive the SSB from cell B to obtain the PCI of cell B, and then determine the scrambling sequence of the paging message based on the PCI of cell B, and descramble the paging message from cell B.

[0141] As described in the background section, when an idle terminal device moves from cell A to cell B, it needs to obtain the PCI of cell B based on the received SSB from cell B, and then receive the paging message from cell B based on the cell B's PCI. If the terminal device does not receive the SSB from cell B after moving to cell B, it cannot receive the paging message from cell B, resulting in a missed paging detection. This is especially true when the SSB period is long or the terminal device moves quickly, increasing the probability of missed paging detection and affecting the efficiency of the terminal device accessing the cell. Furthermore, with the evolution of communication technology, in order to reduce network-side energy consumption, it is considered to extend the SSB period. Currently, the SSB transmission period in NR technology is 20ms. One possible energy-saving method is to extend the SSB transmission period to 320ms, 640ms, 1280ms, etc. However, when using long-period SSB transmissions, if the terminal device moves quickly—for example, it might move from cell A to cell B within the time interval between two SSB transmissions—the terminal device will be unable to receive paging from cell B if it hasn't received an SSB from the other cell. This will make the paging missed detection problem more pronounced. Furthermore, the longer the SSB period or the faster the terminal device moves, the higher the probability of paging missed detection.

[0142] Based on this, the embodiments of this application use the same scrambling sequence (such as the first sequence) to scramble paging messages for different cells within the area. That is, the terminal device can descramble paging messages from different cells within the area based on the same scrambling sequence. The first sequence can be preset or determined based on an initialization seed generated by shared parameters. By replacing the PCI with shared parameters, the scrambling sequence used by different cells within the area for paging messages is the same, thereby solving the problem that the terminal device cannot receive the paging of a cell because it has not obtained the PCI of a cell, resulting in missed paging detection.

[0143] The methods provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0144] Figure 6 is a schematic flowchart of the communication method provided in an embodiment of this application. Figure 6 describes the method provided in this application from the perspective of the interaction between a terminal device and a first network device. The first network device is named only to distinguish it from other network devices in the embodiments of this application, such as the second network device mentioned below.

[0145] In this embodiment, the first network device is the network device corresponding to the first cell, that is, the first cell is the cell formed by the network coverage area provided by the first network device. The second network device is the network device corresponding to the camping cell, that is, the camping cell is the cell formed by the network coverage area provided by the second network device. Here, "region" can represent a group of physically close or geographically adjacent cells that collectively cover a large geographical area. The terminal device may move randomly within this large geographical area, possibly moving from one cell to another. In some examples, the aforementioned region can be a tracking area (TA) or a radio access network notification area (RNA), or any other possible region, such as a preset physical region; there are no limitations on this. A TA is a geographical area in a mobile communication network, consisting of one or more cells, used to manage the mobility and location updates of terminal devices. Within a TA, the terminal device may not need to perform area updates. The random access configuration information of different cells within a TA can be identical. An RNA is a specific geographical area used for the mobility management of terminal devices. Generally, an RNA can be a smaller area than the TA, and its function is similar to that of the TA. The paging-related configuration information can be the same for different cells within an RNA network.

[0146] In one example, the first cell is a neighboring cell of the stationed cell, or the first cell may be located in the same area as the stationed cell. This application does not limit the division of this area; for example, it could be TA (Translational Aspect) as described in the previous example, or RNA (Real-Time Area), or a physical area division based on other methods.

[0147] In another example, the first cell is the cell where the terminal device is camped in the aforementioned area. In this case, the first network device and the second network device can be the same device.

[0148] In this embodiment, the first cell can be the cell to which the terminal device moves from its current cell when it is idle. For example, the first cell can be cell B in Figure 5, and the current cell can be cell A in Figure 5.

[0149] It should be understood that this application does not limit the implementing entity. For example, the terminal device in Figure 6 can also be replaced by components in the terminal device, such as chips, chip systems, processors, etc., or by logic modules or software capable of implementing some or all of its functions; the network device in Figure 6 (such as the first network device and / or the second network device) can be replaced by components in the network device, such as chips, chip systems, processors, etc., or by logic modules or software capable of implementing some or all of its functions. This application does not limit this.

[0150] The method 200 shown in Figure 6 may include steps 210 to 230, and the steps in method 200 are described in detail below.

[0151] S201, the first network device scrambles the paging message based on the first sequence.

[0152] S202, the first network device sends a paging message scrambled with a first sequence to the terminal device. Correspondingly, the terminal device receives the paging message scrambled with the first sequence.

[0153] S203, the terminal device descrambles the paging message based on the first sequence.

[0154] The first sequence is used to scramble paging messages transmitted by all cells within the area. In other words, all cells within the area can use this first sequence as a shared scrambling sequence to scramble paging messages. This allows the terminal device to receive paging messages from a cell (such as the first cell) even without obtaining the PCI of that cell within the area.

[0155] For the first network device, the first sequence can be a scrambling sequence used when scrambling the paging message; for the terminal device, the first sequence can be a descrambling sequence used to descramble the received scrambled paging message. In one possible approach, the first sequence is obtained based on initialization using a first parameter. For example, the first parameter is used as an input parameter to obtain a first initialization seed, and then a scrambling sequence generation algorithm is run based on the first initialization seed to obtain the first sequence.

[0156] Since paging messages can be carried in PDSCH, the first sequence can be called the scrambling sequence of PDSCH. Scrambling the paging message based on the first sequence can also be called scrambling the PDSCH carrying the paging message based on the first sequence.

[0157] The first initialization seed of the PDSCH scrambling sequence (i.e., the first sequence) can, for example, satisfy formula (7) in the aforementioned example. It should be noted that in this embodiment, n in formula (7) ID It can be the first parameter, thus obtaining the first initialization seed, for example, when n is not indicated at a higher level. ID In the case of n ID It is equal to the first parameter. It should be understood that the above formula (7) is only one possible example of determining the first initialization seed in this embodiment, and this application does not limit it. For example, the first initialization seed can also be generated based on more or fewer input parameters.

[0158] This application does not limit the scrambling sequence generation algorithm used when generating the first sequence based on the first initialization seed. For example, the first sequence can be determined by cyclic shifting and / or phase rotation of the first initialization seed. The first sequence used by the first network device and the terminal device is determined based on the same scrambling sequence generation algorithm and the same initialization seed, ensuring that the same first sequence is obtained.

[0159] The methods by which the terminal device obtains the first sequence and the first network device obtains the first sequence may include, for example, the following possible examples:

[0160] In one implementation method, the first sequence can be preset, as agreed upon in the protocol. In this case, the first sequence can be preset in both the terminal device and the first network device. The first network device can read the first sequence from the storage medium and scramble the paging message based on the first sequence. The terminal device can read the first sequence from the storage medium and descramble the received paging message based on the first sequence.

[0161] In the second implementation method, the first sequence can be generated by the first network device. For example, the first network device generates a first initialization seed based on the first parameters, as described in the example above, and determines the first sequence based on the first initialization seed. The terminal device then generates the first sequence in the same way as the first network device.

[0162] In one example of the above implementation method two, the first parameter for generating the first sequence is preset, such as as agreed by the protocol.

[0163] In another example of the above implementation method two, the first parameter for generating the first sequence can be configured by the network device (such as the first network device or the second network device) of the camped cell to the terminal device. This application does not limit the signaling carrying the first parameter; for example, the first parameter can be carried by at least one of SIB, SSB, and RRC signaling.

[0164] In the two examples of the above implementation method two, the polynomial for generating the first initialization seed, such as formula (7) mentioned above, can be preset, such as as agreed by the protocol, or it can be configured by the network device corresponding to the stationed cell; the algorithm for determining the generation of the first sequence based on the first initialization seed can be preset, such as as agreed by the protocol, or it can be configured by the network device corresponding to the stationed cell. This ensures that the first network device and the terminal device obtain the same first sequence based on the same input parameters and the same algorithm.

[0165] Optionally, in the second implementation described above, the first network device and the terminal device can generate the first sequence based on a preset first initialization seed. In this case, the first initialization seed can be agreed upon by a protocol, for example. Optionally, the generation algorithm for determining the first sequence based on the first initialization seed can be preset, such as agreed upon by a protocol, thereby ensuring that the first network device and the terminal device obtain the same first sequence based on the same initialization seed and the same scrambling sequence generation algorithm.

[0166] In the first implementation described above, the first network device and the terminal device scramble and descramble the paging message based on a preset first sequence, eliminating the need to generate the scrambling sequence, thus reducing the complexity of device processing and improving communication efficiency. In the second implementation described above, the first network device and the terminal device each generate a first sequence. In this case, the terminal device can generate a corresponding first sequence in response to the configuration of the network device in the camped cell, achieving flexible communication configuration.

[0167] It should be understood that this application does not limit the first sequence, first parameter, or first initialization seed to be specified in the agreement; that is, some or all of the first sequence, first parameter, or first initialization seed may be specified in the agreement.

[0168] This application does not limit the scrambling algorithm used by the first network device when scrambling the paging message based on the first sequence. For example, see formula (6) above, which scrambles the paging message based on the first sequence. For paging messages from any cell in the area, such as paging messages sent by the first network device, the terminal device uses the first sequence to descramble the received paging message. The descrambling algorithm used by the terminal device when descrambling the received paging message corresponds to the scrambling algorithm used by the network side. The descrambling process can be understood as the reverse process of scrambling.

[0169] Therefore, in this embodiment of the application, paging messages from different cells within the region are all scrambled using a first sequence, and this first sequence can be shared in all cells within the region. Based on this, when the terminal device moves from the stationary cell to another cell in the idle state, it can receive the paging message from that cell in a timely manner, thereby avoiding the problem of missed paging detection.

[0170] Specifically, by replacing the cell's PCI with the first parameter, the problem of missed paging detection is solved because the terminal device cannot receive the cell's paging due to not obtaining the cell's PCI, such as not receiving the cell's SIB1.

[0171] Figure 7 is a schematic flowchart of the communication method provided in an embodiment of this application. Figure 7 describes the method provided in this application from the perspective of the interaction between a terminal device and a first network device. The embodiment shown in Figure 7 can be implemented based on the embodiment shown in Figure 6 above. In the embodiment shown in Figure 6, the first network device sends a paging message to the terminal device to achieve paging. In some embodiments, in order to enable the terminal device to better demodulate the paging message, the first network device can send a reference signal to the terminal device, such as a demodulation reference signal (DMRS). The terminal device performs channel estimation, compensation, and auxiliary demodulation based on the reference signal from the first network device, thereby accurately demodulating the paging message.

[0172] In the embodiment shown in FIG7, S201 to S203 can be referred to the description in the embodiment shown in FIG6 above, and will not be repeated for the sake of brevity.

[0173] In Figure 7, S204: The first network device sends the first DMRS to the terminal device. The first DMRS is shared by all cells in the area and is used to demodulate the PDSCH carrying the paging message. In other words, the first DMRS is used to demodulate the paging messages of all cells in the area.

[0174] To ensure that the first DMRS is shared by all cells within the area, the first DMRS can be determined based on a second initialization seed generated from a second parameter. The second parameter is shared by all cells within the area, meaning it is unrelated to cell information, such as excluding cell PCI. For example, the second parameter is used as an input parameter to obtain the second initialization seed, and then a sequence generation algorithm is run based on the second initialization seed to obtain the first DMRS. The second initialization seed can satisfy formula (3) in the aforementioned example. It should be noted that in this embodiment, formula (3)... It can be a second parameter, thus obtaining a second initialization seed, for example, if not indicated at a higher level. In this case, It is equal to the second parameter. It should be understood that the above formula (3) is only one possible example of determining the second initialization seed in this embodiment, and this application does not limit it. For example, the second initialization seed can also be generated based on more or fewer input parameters.

[0175] This application does not limit the sequence generation algorithm used when generating the first DMRS based on the second initialization seed. For example, the first DMRS can satisfy formula (2) in the aforementioned example. The first DMRS is a known signal, and the terminal device can demodulate the paging message from the first network device by comparing the received first DMRS from the first network device with the expected first DMRS.

[0176] The acquisition of the first DMRS by the first network device and the acquisition of the expected first DMRS by the terminal device can be achieved through the following possible examples:

[0177] In implementation method 1, the first DMRS can be preset, as agreed upon in the protocol. In this case, the first DMRS can be preset in the terminal device and the first network device. The first network device can read the first DMRS from the storage medium and send the first DMRS. The terminal device can read the first DMRS from the storage medium and combine it with the paging message received from the first network device in the first DMRS demodulation S202.

[0178] In implementation method 2, the first DMRS can be generated by the first network device. For example, the first network device generates a second initialization seed based on the second parameters, as described in the example above, and determines the first DMRS according to the second initialization seed. The terminal device then determines the expected first DMRS in a similar manner to the first network device.

[0179] In one example of the above implementation method 2, the second parameter for generating the first DMRS is preset, as agreed in the protocol.

[0180] In another example of the above implementation method 2, the second parameter for generating the first DMRS can be configured to the terminal device by the network device (such as the first network device or the second network device) camped in the cell. This application does not limit the signaling carrying the first parameter; for example, the first parameter can be carried by at least one of SIB, SSB, and RRC signaling.

[0181] Optionally, the second parameter and the first parameter can have the same or different values. When the second parameter and the first parameter have the same value, the network device camped in the cell (such as the first network device or the second network device) configures a parameter value to the terminal device, and this parameter value is used as the parameter value of the first parameter and the second parameter to save signaling overhead.

[0182] In the two examples of implementation method 2 above, the polynomial for generating the second initialization seed, such as formula (3) mentioned above, can be preset, such as as agreed by the protocol, or it can be configured by the network device corresponding to the stationed cell; the generation algorithm for determining the first DMRS based on the second initialization seed can be preset, such as as agreed by the protocol, or it can be configured by the network device corresponding to the stationed cell. Thus, the terminal device determines the expected first DMRS based on the same input parameters and the same algorithm as the first network device.

[0183] Optionally, in implementation 2 above, the first network device can generate a first sequence based on a preset second initialization seed, and the terminal device can determine the expected first DMRS based on the preset second initialization seed. In this case, the second initialization seed can be agreed upon by a protocol, for example. Optionally, the generation algorithm for determining the first DMRS based on the second initialization seed can be preset, such as agreed upon by a protocol, thereby ensuring that the terminal device determines the expected first DMRS based on the same initialization seed and the same scrambling sequence generation algorithm as the first network device.

[0184] In implementation method 1 above, when a first DMRS is preset, the first network device and the terminal device do not need to perform the sequence generation process, reducing the complexity of device processing and improving communication efficiency. In implementation method 2 above, the first network device generates the first DMRS, and the terminal device determines the expected first DMRS. In this case, the terminal device can determine the expected first DMRS in response to the configuration of the network device in the camped cell, realizing flexible configuration of communication.

[0185] It should be understood that this application does not limit the agreement to one of the first DMRS, the second parameter, or the second initialization seed; that is, some or all of the first DMRS, the second parameter, or the second initialization seed may be agreed upon by the agreement.

[0186] In this embodiment, the first DMRS of all cells in the area is the same DMRS, and the first DMRS is preset or determined based on the second initialization seed generated by the second parameter. The second parameter can be shared in all cells in the area, so that different cells in the area use the same first DMRS. Based on this, for all cells in the area, the terminal device can compare the expected first DMRS with the received first DMRS, and then demodulate the paging message from the corresponding cell to avoid the problem of paging missed detection.

[0187] Specifically, by replacing the cell's PCI with a second parameter, the problem of missed paging detection is solved because the terminal device cannot receive and accurately demodulate the paging message of the cell due to the failure to obtain the cell's PCI, such as the failure to receive the cell's SIB1.

[0188] Figure 8 is a schematic flowchart of the communication method provided in an embodiment of this application. Figure 8 describes the method provided in this application from the perspective of the interaction between a terminal device and a first network device. The description of the execution entity of the embodiment shown in Figure 8 can be found in the descriptions in Figures 6 and 7 above, and will not be repeated for brevity.

[0189] In some embodiments, before the first network device sends a paging message to the terminal device to perform paging, the paging message can also be scheduled via DCI. Therefore, how can the terminal device descramble the DCI from the first cell in the area without receiving the SSB of the first cell? The embodiment shown in Figure 8 provides an effective solution to this problem.

[0190] Referring to S205 in Figure 8, the first network device sends the second DMRS to the terminal device. The second DMRS is shared by all cells in the area and is used to demodulate the PDCCH carrying DCI. In other words, the second DMRS is used to demodulate the DCI of all cells in the area.

[0191] To ensure that the second DMRS is shared by all cells within the area, the second DMRS can be determined based on a fourth initialization seed generated from a fourth parameter. The fourth parameter is shared by all cells within the area, meaning it is unrelated to cell information, such as excluding cell PCI. For example, the fourth parameter is used as an input parameter to obtain the fourth initialization seed, and then a sequence generation algorithm is run based on the fourth initialization seed to obtain the second DMRS. The fourth initialization seed can satisfy formula (5) in the aforementioned example. It should be noted that in this embodiment, N in formula (5)... ID It can be the fourth parameter, thus obtaining the fourth initialization seed, for example, where N is not indicated at a higher level. ID In the case of N ID It is equal to the fourth parameter. It should be understood that the above formula (5) is only one possible example of determining the fourth initialization seed in this embodiment, and this application does not limit it. For example, the fourth initialization seed can also be generated based on more or fewer input parameters.

[0192] This application does not limit the sequence generation algorithm used when generating the second DMRS based on the fourth initialization seed. For example, the second DMRS can satisfy formula (4) in the aforementioned example. The second DMRS is a known signal, and the terminal device can demodulate the DCI from the first network device by comparing the received second DMRS from the first network device with the expected second DMRS. In this way, the terminal device performs channel estimation, compensation, and assisted demodulation of the PDCCH based on the second DMRS from the first network device, thereby achieving accurate demodulation of the DCI.

[0193] The first network device acquires the second DMRS in the same or similar way as the first network device acquires the first DMRS, and the terminal device acquires the expected second DMRS in the same or similar way. See the examples above for implementation 1, implementation 2, or other related examples for acquiring the first DMRS; for brevity, these will not be repeated.

[0194] Optionally, the fourth parameter and the first parameter can have the same or different values; the fourth parameter and the second parameter can also have the same or different values. For parameters with the same value, the network device camped in the cell (such as the first or second network device) configures a parameter value to the terminal device, thereby enabling the configuration of at least two parameters to save signaling overhead.

[0195] This application does not limit the reference signal for demodulating DCI to DMRS, i.e., the second DMRS, or it can be replaced with other reference signals; this application does not impose any limitations on this. Furthermore, S205 is an optional execution step.

[0196] Referring to S206 and S207 in Figure 8, the first network device scrambles the DCI based on a second sequence. The second sequence is used to scramble the DCI transmitted by all cells in the area. That is, all cells in the area can use this second sequence as a shared scrambling sequence to scramble the DCI. In this way, even if the terminal device does not obtain the PCI of a cell (such as the first cell) in the area, it can still receive the DCI of that cell (such as the first cell), and then receive the paging of that cell (such as the first cell) based on the DCI scheduling.

[0197] For the first network device, the second sequence can be the scrambling sequence used when scrambling the DCI; for the terminal device, the second sequence can be the descrambling sequence used to descramble the received scrambled DCI. The second sequence is obtained based on the initialization of the third parameter. For example, the third parameter is used as an input parameter to obtain the third initialization seed, and then the scrambling sequence generation algorithm is run based on the third initialization seed to obtain the second sequence. The DCI can be carried on the PDCCH; therefore, the second sequence can be called either the scrambling sequence of the PDCCH, which scrambles the DCI based on the first sequence, or it can be called the scrambling of the PDCCH carrying the DCI based on the second sequence.

[0198] The third initialization seed of the scrambling sequence (i.e., the second sequence) of PDCCH can, for example, satisfy formula (10) in the aforementioned example. It should be noted that in the embodiments of this application, n in formula (10) ID It can be a third parameter, thus obtaining a third initialization seed, for example, when n is not indicated at a higher level. ID In the case of n ID It is equal to the third parameter. It should be understood that the above formula (10) is only one possible example of determining the third initialization seed in this embodiment, and this application does not limit it. For example, the first initialization seed can also be generated based on more or fewer input parameters.

[0199] This application does not limit the scrambling sequence generation algorithm used when generating the second sequence based on the third initialization seed. For example, the second sequence can be determined by cyclic shifting and / or phase rotation of the third initialization seed. The second sequence used by both the first network device and the terminal device is determined based on the same scrambling sequence generation algorithm and the same initialization seed, ensuring that the same second sequence is obtained.

[0200] Optionally, the scrambling sequence generation algorithm used when generating the first sequence based on the first initialization seed can be the same as or different from the scrambling sequence generation algorithm used when generating the second sequence based on the third initialization seed. This application does not limit this.

[0201] The terminal device's acquisition of the second sequence has the same or similar implementation method and technical effect as the terminal device's acquisition of the first sequence; the first network device's acquisition of the second sequence has the same or similar implementation method and technical effect as the first network device's acquisition of the first sequence. See the aforementioned examples for implementation method one, implementation method two, or other related examples; for brevity, they will not be elaborated further.

[0202] Optionally, the value of the third parameter may be different from all of the first, second, and fourth parameters, or the third parameter may have the same value as some or all of the first, second, or fourth parameters; this application does not limit this. For parameters with the same value, the network device camped in the cell (such as the first or second network device) configures a parameter value to the terminal device to configure at least two parameters, thereby saving signaling overhead.

[0203] This application does not limit the scrambling algorithm used by the first network device when scrambling the paging message based on the first sequence. For example, see formula (9) above, which scrambles the DCI based on the second sequence.

[0204] In some embodiments, the first network device can generate an interleaver based on a fifth parameter, and then perform CCE-to-REG interleaving mapping according to the generated interleaver, thereby sending the PDCCH. This interleaver can be generated, for example, according to the aforementioned formula (8), and the fifth parameter can be, for example, n in formula (8). shift For example, in high-rise buildings where n is not indicated shift In the case of n shift The fifth parameter is equal to the fifth parameter. The interleaver generated based on the fifth parameter can be preset (as defined in the protocol), or the fifth parameter can be preset (as defined in the protocol), or the fifth parameter can be configured by the network device (such as the first network device or the second network device) stationed in the cell to the terminal device; this application does not limit this.

[0205] The first network device configures a CORESET for the terminal device, and the terminal device determines the mapping relationship from CCE to REG based on the configured CORESET. Optionally, the terminal device can obtain a preset interleaver, or determine the interleaver based on a preset or configured fifth parameter. Then, the terminal device receives DCI, or in other words, receives the PDCCH carrying DCI, based on the CORESET.

[0206] Optionally, the fifth parameter may have different values ​​from the first to fourth parameters, or some or all of the fifth parameter may have the same value as some of the first to fourth parameters; this application does not limit this. For parameters with the same value, the network device camped in the cell (such as the first or second network device) configures a parameter value to the terminal device to configure at least two parameters, thereby saving signaling overhead.

[0207] Referring to S208 in Figure 8, the terminal device descrambles the DCI based on the second sequence. For paging messages from any cell within the area, such as DCI sent by the first network device, the terminal device uses the second sequence to descramble the received DCI. The descrambling algorithm used by the terminal device to descramble the received DCI corresponds to the scrambling algorithm used by the network side. The descrambling process can be understood as the reverse process of scrambling.

[0208] Furthermore, by executing some or all of S204, S201, S202, or S203 in Figure 8, the first network device can paging the terminal device. Those skilled in the art will understand that in S201, the terminal device can determine the time-frequency resources for transmitting the paging message based on the DCI obtained in S208, and then receive the paging message scrambled with the first sequence on the corresponding time-frequency resources. The implementation methods of S204, S201, S202, and S203 in Figure 8 can be found in the descriptions in the aforementioned examples, and will not be repeated for brevity.

[0209] In this embodiment, the DCIs of scheduling paging messages from different cells within the region are all scrambled using a second sequence. This second sequence is preset or determined based on a third initialization seed generated by a third parameter. The third parameter can be shared across all cells within the region, ensuring that different cells within the region use the same scrambling sequence for the DCIs of scheduling paging messages. Based on this, when the terminal device moves from its stationary cell to another cell in an idle state, it can promptly receive the DCI of that cell and the paging message scheduled by that DCI, thereby avoiding the problem of missed paging detection.

[0210] Figure 9 is a schematic flowchart of a communication method provided in an embodiment of this application. Figure 9 describes the method provided in this application from the perspective of interaction between a terminal device, a first network device, and a second network device. The embodiment shown in Figure 9 can be implemented based on the embodiments shown in Figure 6 or Figure 7 above. For ease of description, this embodiment is described based on the embodiment shown in Figure 7.

[0211] In Figure 9, the first network device is the network device corresponding to the first cell, and the second network device is the network device corresponding to the stationary cell. When the first cell is a stationary cell, the first network device and the second network device are the same network device.

[0212] Referring to S209 in Figure 9, the second network device can send paging configuration information for the area to the terminal device. The paging configuration of all cells in the area is the paging configuration indicated by this paging configuration information, or in other words, the paging configuration indicated by this paging configuration information can be shared by all cells in the area.

[0213] The paging configuration information for a region may include PDSCH paging configuration and / or PDCCH paging configuration.

[0214] The PDCCH paging configuration indicates the time-frequency resources for transmitting DCI (e.g., referred to as the first time-frequency resources), or in other words, the time-frequency resources of the PDCCH carrying DCI. For example, the PDCCH paging configuration may include information configuring the PDCCH time-domain resources and information configuring the PDCCH frequency-domain resources.

[0215] For example, the information for configuring the time-domain resources of the PDCCH includes at least one of the following:

[0216] i. Frame structure ratio: can be configured by the uplink / downlink common configuration (tdd-UL-DL-ConfigurationCommon) field;

[0217] ii. Location of receiving paging DCI: This can be the paging search space.

[0218] iii. Paging message configuration: at least one of the following: paging period, number of paging frames (PF) and offset, and number of paging occasions (PO) in the PF.

[0219] iv. Starting position of PO

[0220] For example, information configuring the frequency domain resources of the PDCCH may include at least one of the following:

[0221] i. Frequency band list: includes multiple possible frequencies for transmitting DCI;

[0222] ii. Frequency reference point (Point A): Used to indicate the starting position of the initial BWP;

[0223] iii. Carrier configuration: such as a list of carriers including different subcarrier spacings.

[0224] PDSCH paging configuration indicates the time-frequency resources (e.g., referred to as third time-frequency resources) for transmitting paging messages, or in other words, indicates the time-frequency resources of the PDSCH carrying the paging message. For example, PDSCH paging configuration may include information configuring PDSCH time-domain resources and information configuring PDSCH frequency-domain resources.

[0225] For example, the information for configuring the time-domain resources of PDSCH includes at least one of the following:

[0226] i.K0: Slot offset between the DCI and its scheduled PDSCH;

[0227] ii. Mapping type;

[0228] iii. Start symbol and length: Ensure that allocated resources do not cross time slot boundaries.

[0229] For example, the information configured for PDSCH frequency domain resources can indicate that the PDSCH frequency domain resources remain the same as the initial bandwidth part (BWP).

[0230] The above paging configuration is merely an illustrative example. This application does not limit the specific content or method of the paging configuration, but only the time and frequency resources of the PDSCH that carry the paging message are indicated, all of which fall within the protection scope of this application.

[0231] The time-frequency resources (such as the first time-frequency resource) of the DCI indicated by the PDCCH paging configuration can be shared by different cells within the area, or the time-frequency resources (such as the first time-frequency resource) of the DCI indicated by the PDCCH paging configuration include the time-frequency resources occupied by different cells within the area for transmitting DCI. The time-frequency resources (such as the third time-frequency resource) of the paging message indicated by the PDSCH paging configuration can be shared by different cells within the area, or the time-frequency resources (such as the third time-frequency resource) of the paging message indicated by the PDSCH paging configuration include the time-frequency resources occupied by different cells within the area for transmitting paging messages. Based on this, for a paging message from any cell within the area, the terminal device can receive the paging message on the time-frequency resources configured by the paging configuration, based on the indication of the paging configuration information.

[0232] Generally, paging configuration information can be carried in an SIB, such as SIB1. Therefore, based on the SIB sent by the second network device, the terminal device can obtain the paging configuration shared by all cells in the area, and then receive paging messages from any cell in the area on the corresponding time-frequency resources.

[0233] As an example, the first network device schedules paging messages via DCI. In this case, S205 to S208 in Figure 9 are executed. In S207, the first network device sends a scrambled DCI to the terminal device on a first time-frequency resource. Correspondingly, the terminal device receives the scrambled DCI on the first time-frequency resource indicated by the paging configuration information. Thus, without obtaining the paging configuration from the first network device's SIB, the terminal device determines the time-frequency resource on which the first network device transmits the DCI, and then receives the first network device's DC on the time-frequency resource scheduled by the DCI.

[0234] As another example, the first network device does not schedule paging messages through DCI. In this case, S205 to S208 in Figure 9 are not executed. Instead, S204, S201, S202 and S203 are executed directly. In S202, the first network device sends a scrambled paging message to the terminal device in the second time-frequency resource. Correspondingly, the terminal device receives the scrambled paging message from the second network device in the second time-frequency resource indicated by the paging configuration information. Thus, without obtaining the paging configuration from the first network device's SIB, the terminal device successfully receives the paging message from the first network device, reducing the probability of paging missed detection.

[0235] This embodiment does not limit the signaling that carries paging configuration information; for example, it can also be carried by at least one of SSB, DCI, or RRC signaling.

[0236] In Figure 9, S201 to S208 have the same or similar implementation methods and technical effects as the aforementioned examples, and will not be described again for the sake of brevity.

[0237] In some embodiments, the first network device can also send public messages other than paging messages, such as DCI 2_7, DCI 2_9, or DCI 4_1, to the terminal devices. DCI 2_7 can be used to provide early paging indication to a group of terminal devices, indicating that a paging message is about to arrive, preparing the terminal devices to receive paging, reducing paging latency and power consumption. The TRS availability indication in DCI 2_7 is used to notify the terminal devices whether a TRS signal is currently available. DCI 2_9 can be used to activate or deactivate cell DTX and DRX for a group of terminal devices. DCI 4_1 is used to schedule multicast PDSCH in downlink cells. To facilitate the terminal devices in distinguishing public messages sent from different cells and to achieve secure isolation between cells, for each cell in the area, these non-paging messages or public messages unrelated to paging are scrambled based on their own PCI to obtain first information.

[0238] Referring to S210 in Figure 9, the first network device sends first information to the terminal device on the second time-frequency resource, and correspondingly, the terminal device receives the first information from the first network device on the second time-frequency resource. For example, the first information includes a third sequence or information scrambled based on a fourth sequence. The third sequence is determined based on a fifth initialization seed generated by the PCI of the first cell; for example, the third sequence can be a sequence of reference signals determined based on the fifth initialization seed generated by the PCI of the first cell. The fourth sequence is determined based on a sixth initialization seed generated by the PCI of the first cell; for example, the fourth sequence can be a scrambled sequence determined based on the sixth initialization seed generated by the PCI of the first cell.

[0239] Taking the scrambling sequence of PDCCH with DMRS for PDCCH as the third sequence and DCI (such as DCI 2_7, DCI 2_9 or DCI 4_1) as the fourth sequence as an example, the third sequence can be generated based on formula (4) in the previous example, where the initialization seed of the pseudo-random sequence c(i), i.e. the fifth initialization seed, can be determined based on formula (5) in the previous example, and N in formula (5) ID It can be the PCI of the first cell. The fourth sequence can be obtained by scrambling the public message based on formula (9) in the previous example, and the fourth sequence can be obtained by scrambling based on formula (10) in the previous example. ID It can be the PCI of the first cell.

[0240] The PDCCH is transmitted within the frequency domain range specified in the CORESET. Optionally, when the CCE to REG mapping corresponding to the CORESET is an interleaved mapping, the interleaver of the interleaved mapping can satisfy the above formula (8), and n in formula (8) shift It is the PCI of the first community.

[0241] The second time-frequency resource is different from the first and third time-frequency resources configured in the paging configuration information.

[0242] In other words, when the terminal device receives a common message from the first cell on the second time-frequency resource (i.e., the time-frequency resource not indicated by the paging configuration), it needs to descramble the common message using the PCI of the first cell. That is, before receiving the first information, the terminal device needs to receive the SSB from the first cell to obtain the PCI of the first cell.

[0243] Furthermore, the terminal device receives a third sequence based on the PCI of the first cell, or determines a fourth sequence based on the PCI of the first cell, and then descrambles the public message based on the fourth sequence, thereby realizing the reception of the public message.

[0244] The methods provided in the embodiments of this application have been described in detail above with reference to several accompanying drawings. The apparatus provided in the embodiments of this application will now be described with reference to the accompanying drawings.

[0245] Figures 10 and 11 are schematic block diagrams of possible apparatuses provided in embodiments of this application. These apparatuses can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the apparatus can be the terminal device or network device in the method embodiments, or it can be a component (such as a chip, chip system, processor, etc.) configured in the terminal device or network device, or it can be a logic module or software capable of implementing some or all of the functions of the terminal device or network device.

[0246] The device provided in this application is shown in Figure 10. The device 300 includes a transceiver module 310 and a processing module 320.

[0247] For example, when the device 300 is used to implement the method embodiment on the terminal device side described above, the transceiver module 310 can be used to receive a paging message scrambled by a first sequence, wherein the first sequence is preset, or the first sequence is determined based on a first initialization seed generated by a first parameter, wherein the first parameter is preset or configured by a network device, and the first sequence is used to scramble paging messages transmitted in all cells within the area; the processing module 320 can be used to descramble the scrambled paging message based on the first sequence.

[0248] For example, when the device 300 is used to implement the method embodiment on the network device (such as the first network device) side, the processing module 320 can be used to scramble the paging message based on a first sequence, wherein the first sequence is preset, or the first sequence is determined based on a first initialization seed generated by a first parameter, wherein the first parameter is preset or configured by the network device, and the first sequence is used to scramble the paging messages transmitted in all cells within the area; the transceiver module 310 can be used to send the paging message scrambled by the first sequence.

[0249] A more detailed description of the transceiver unit 310 and the processing unit 320 can be obtained directly from the relevant descriptions in the method embodiments, and will not be repeated here.

[0250] In one possible design, when the device 300 is a network device or a communication module in a network device, the function of the processing unit 320 can be implemented by one or more processors.

[0251] In one possible design, when the device 300 is a circuit or chip responsible for communication functions in a network device, the function of the processing unit 320 can be implemented by a circuit system in the chip that includes one or more processors or processor cores. The function of the transceiver unit 310 can be implemented by interface circuits or data transceiver circuits on the chip.

[0252] It should also be understood that the transceiver unit in the communication device 300 can also be called a communication unit. The transceiver unit 310 may include a transmitting unit but not a receiving unit. Alternatively, the transceiver unit 310 may include a receiving unit but not a transmitting unit. Specifically, it depends on whether the above-described scheme performed by the device 300 includes both transmitting and receiving actions. The receiving unit can be used to perform the receiving action in the above-described scheme, and the transmitting unit can be used to perform the transmitting action in the above-described scheme.

[0253] It is understood that the division of units in the above-described device is merely a logical functional division. Each function can correspond to a functional unit, or two or more functions can be integrated into one functional unit. In actual implementation, all or some units can be integrated into a single physical entity, or they can be distributed across different physical entities. Furthermore, the aforementioned functional units can be implemented in hardware, software, or a combination of both. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0254] Figure 11 is another schematic block diagram of the device provided in an embodiment of this application. As shown in Figure 11, the device 400 includes one or more processors 410. The processor 410 may be a general-purpose processor or a special-purpose processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the device (e.g., a vehicle or a chip), execute software programs, and process data from the software programs.

[0255] Alternatively, in one design, processor 410 may include a computer program (also referred to as code or instructions) that can be run on processor 410, causing device 400 to perform the methods executed by the terminal or network device in the above method embodiments. In yet another possible design, device 400 includes circuitry (not shown in FIG11) for implementing the functions of the terminal device or network device in the above method embodiments.

[0256] For example, processor 410 may be used to execute a computer program in memory to implement the steps performed by a terminal device or network device in the method embodiment.

[0257] Optionally, the device 400 may include one or more memories 420 storing computer programs (sometimes referred to as code or instructions) that can be run on the processor 410, causing the device 400 to perform the methods performed by the terminal device or network device in the above embodiments.

[0258] Optionally, the processor 410 and / or memory 420 may also store data. The processor and memory may be configured separately or integrated together.

[0259] Optionally, the device 400 may also include a communication interface 430. The processor 410, sometimes referred to as a processing unit, controls the device (e.g., a terminal device or a network device). The communication interface 430, sometimes referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, is used to implement the transceiver function of the device; for example, the communication interface 430 can be used to receive first configuration information.

[0260] Optionally, the device 400 also includes a communication interface 430. The processor 410 and the communication interface 430 are coupled to each other. It is understood that the communication interface 430 can be a transceiver or an input / output interface.

[0261] When the device 400 is used to implement the method in the method embodiment, the processor 410 can be used to execute the functions of the processing unit 320, and the communication interface 430 can be used to execute the functions of the transceiver unit 310. Whether the communication interface 430 is used for sending or receiving depends on whether the device 400 is used to perform a sending or receiving action in the scheme it is executing.

[0262] When the aforementioned device 400 is a chip applied to a terminal device, the chip implements the functions of the terminal device in the above method embodiments. The chip of the terminal device receives signals from other modules (such as radio frequency modules or antennas) in the terminal device, and these signals may be sent to the terminal device by the network device; or, the chip of the terminal device sends signals to other modules (such as radio frequency modules or antennas) in the terminal, and these signals may be sent to the network device by the terminal device.

[0263] When the aforementioned device 400 is a chip applied to a network device, the chip implements the functions of the network device in the above method embodiments. The chip of the network device receives signals from other modules in the network device, which may be signals sent by a terminal device to the network device; or, the chip of the network device sends signals to other modules in the network device, which may be signals sent by the network device to a terminal device.

[0264] It is understood that when the device 400 is a terminal device or a network device, the communication interface 430 can be a transceiver, specifically including a transmitter and a receiver, with the transmitter used to send signals and the receiver used to receive signals. When the device 400 is a chip applied to a terminal device or a network device, the communication interface 430 can be an input / output circuit, wherein the input circuit can be used for receiving and the output interface can be used for sending.

[0265] Optionally, the device 400 also includes a power supply circuit for supplying power to the device 400.

[0266] It should be noted that the above method embodiments can be applied to a processor, or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by software instructions.

[0267] The aforementioned processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0268] The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in mature storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0269] The memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0270] This application also provides a chip system including at least one processor for supporting the implementation of the functions of the terminal device or network device involved in any of the above method embodiments, such as sending, receiving, or processing the information involved in the above methods.

[0271] In one possible design, the chip system also includes a memory for storing computer program instructions and data, which may be located inside or outside the processor.

[0272] The chip system can consist of chips or include chips and other discrete components.

[0273] This application also provides a computer program product comprising: a computer program (also referred to as code or instructions), wherein when the computer program is run, the method executed by the terminal device in the method embodiment is executed, or the method executed by the network device is executed.

[0274] This application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is run, the method executed by the terminal device or the method executed by the network device in the method embodiment is executed.

[0275] This application also provides a communication system, which includes the aforementioned terminal equipment and network equipment.

[0276] The methods provided in the above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, they can be implemented, in whole or in part, in the form of a computer program product. This computer program product may include one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic disk), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0277] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0278] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0279] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0280] The unit described as a separate component may or may not be physically separate. The component shown as a unit may or may not be a physical unit; that is, it may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0281] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0282] If this function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, or part of it, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, include: Receive paging messages scrambled with a first sequence, wherein the first sequence is used to scramble paging messages transmitted in all cells within the area; The scrambled paging message is descrambled based on the first sequence.

2. The method according to claim 1, characterized in that, Also includes: The system receives a first demodulation reference signal (DMRS), which is used to demodulate the PDSCHs corresponding to all cells in the area, and the PDSCHs carry paging messages.

3. The method according to claim 1 or 2, characterized in that, Also includes: Receive downlink control information (DCI) scrambled with a second sequence, wherein the DCI is used to schedule the paging message, and the second sequence is used to scramble the DCI transmitted in all cells within the area; The scrambled DCI is descrambled based on the second sequence.

4. The method according to claim 3, characterized in that, Also includes: The second DMRS is received, which is used to demodulate the PDCCH corresponding to all cells in the area, and the PDCCH carries the DCI.

5. The method according to any one of claims 1 to 4, characterized in that, The first sequence is preset, or the first sequence is determined based on a first initialization seed generated by a first parameter, where the first parameter is preset or configured by the network device.

6. The method according to claim 5, characterized in that, The first parameter is configured by the network device and includes: the first parameter is carried in the System Message Block (SIB), Synchronization Message Block (SSB), or Radio Resource Control (RRC) signaling.

7. The method according to any one of claims 1 to 6, characterized in that, Receiving the paging message scrambled with a first sequence includes: Receive paging configuration information for the area, wherein the paging configuration of all cells in the area is the paging configuration indicated by the paging configuration information; A DCI is received on the first time-frequency resource configured in the paging configuration information, and the DCI is used to schedule the paging message.

8. The method according to claim 7, characterized in that, Also includes: First information from a first cell is received on a second time-frequency resource. The first information includes a third sequence or information scrambled based on a fourth sequence. The fourth sequence scrambled information includes at least one of the following: a common message for paging early indication, a common message for tracking reference signal (TRS) availability indication, a common message for activating or deactivating discontinuous transmission of DTX in a cell, or a common message for activating or deactivating discontinuous reception of DRX in a cell. The third sequence is determined based on a fifth initialization seed generated based on the physical cell identifier (PCI) of the first cell, and the fourth sequence is determined based on a sixth initialization seed generated based on the PCI of the first cell. The second time-frequency resource is different from the first time-frequency resource, and the first cell is located in the area.

9. The method according to any one of claims 1 to 8, characterized in that, The region is a notification region (RNA) or a tracking region (TA) based on a wireless access network.

10. A communication method, characterized in that, include: The paging message is scrambled based on a first sequence, which is used to scramble the paging messages transmitted in all cells within the area; Send a paging message that has been scrambled by the first sequence.

11. The method according to claim 10, characterized in that, Also includes: A first DMRS is sent, which is used to demodulate the PDSCH corresponding to all cells in the area, and the PDSCH carries paging messages.

12. The method according to claim 10 or 11, characterized in that, Also includes: The DCI is scrambled based on a second sequence, wherein the DCI is used to schedule the paging message, and the second sequence is used to scramble the DCI transmitted in all cells within the area; The DCI scrambled by the second sequence is sent.

13. The method according to claim 12, characterized in that, Also includes: A second DMRS is transmitted, which is used to demodulate the PDCCH corresponding to all cells in the area, and the PDCCH carries the DCI.

14. The method according to any one of claims 10 to 13, characterized in that, Also includes: Send a first parameter, the first sequence is determined based on a first initialization seed generated by the first parameter, and the first parameter is carried in SIB, SSB or RRC signaling.

15. The method according to any one of claims 10 to 14, characterized in that, Also includes: A DCI is sent on the first time-frequency resource configured in the paging configuration information of the region. The DCI is used to schedule the paging message. The paging configuration of all cells in the region is the paging configuration indicated by the paging configuration information.

16. The method according to claim 15, characterized in that, Also includes: Send the paging configuration information for the area.

17. The method according to claim 15 or 16, characterized in that, Also includes: First information is transmitted on a second time-frequency resource. The first information includes information scrambled with a third sequence or based on a fourth sequence. The fourth sequence scrambled information includes at least one of the following: a common message for paging early indication, a common message for tracking reference signal (TRS) availability indication, a common message for activating or deactivating discontinuous transmission of DTX in a cell, or a common message for activating or deactivating discontinuous reception of DRX in a cell. The third sequence is determined based on a fifth initialization seed generated based on the PCI of the first cell, and the fourth sequence is determined based on a sixth initialization seed generated based on the PCI of the first cell. The second time-frequency resource is different from the first time-frequency resource, and the first cell is located in the area.

18. A communication device, characterized in that, include: A module for performing the method as described in any one of claims 1 to 9, or a module for performing the method as described in any one of claims 10 to 17.

19. A communication system, characterized in that, include: A communication device for performing the method as described in any one of claims 1 to 9, and a communication device for performing the method as described in any one of claims 10 to 17.

20. A computer-readable storage medium, characterized in that, Used to store computer program instructions, the computer program causing the computer to perform the method as described in any one of claims 1 to 17.

21. A computer program product, characterized in that, It includes computer program instructions that cause a computer to perform the method as described in any one of claims 1 to 17.

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