Method and apparatus for supporting synchronization in wireless communication

Abstract

The present application discloses a method and apparatus for supporting synchronization in wireless communication. The method comprises: a first node receiving a first message, the first message comprising parameters of a target cell; and as a response to receiving the first message, synchronizing to the target cell, wherein the parameters of the target cell comprise a plurality of identifiers, and the synchronizing to the target cell comprises: receiving at least one synchronization signal, and any one of the at least one synchronization signal indicating one of the plurality of identifiers. The present application can simplify a signaling structure, and improve network deployment flexibility.

Description

Method and device for supporting synchronization in wireless communication Technical Field

[0001] The present application relates to methods and devices in wireless communication systems, and more particularly to methods and devices for supporting network synchronization in cellular wireless communication. Background Art

[0002] The application scenarios of future wireless communication systems are becoming increasingly diverse, and different scenarios place varying performance requirements on the systems. To meet these diverse performance demands, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) plenary meeting #72 decided to conduct research on New Radio (NR) (or 5G). The 3GPP RAN plenary meeting #75 approved the WI (Work Item) for New Radio, initiating standardization work on NR.

[0003] RIS (Reconfigurable Intelligent Surface) is an artificial electromagnetic surface structure with programmable electromagnetic properties, consisting of a large number of independent, low-cost, passive subwavelength resonant units. Each RIS unit has independent electromagnetic wave control capabilities, and its response to wireless signals, such as phase, amplitude, and polarization, can be controlled by changing its parameters and spatial distribution. By superimposing the wireless response signals of a large number of RIS units, specific beam propagation characteristics are formed on a macro scale, thereby forming a flexible and controllable shaped beam, achieving the effects of eliminating coverage blind spots, enhancing edge coverage, and increasing the rank of multi-stream transmission. RIS technology is characterized by low cost, low energy consumption, programmability, easy deployment, and high shaping gain achieved with larger antenna scales. It is considered a key technology for 5G Advanced research and one of the core visions of 6G. Summary of the Invention

[0004] Network synchronization is a fundamental issue in wireless communications and requires further research in future wireless communication scenarios. In response to the above problems, the present application discloses a solution. Although the original intention of the present application is to target network scenarios where RIS is deployed, the present application can also be used in other network scenarios where RIS is not deployed to achieve technical effects similar to those of network scenarios where RIS is deployed. Other network scenarios where RIS is not deployed include but are not limited to physical layer relay (or Layer 0 relay), coverage enhancement, capacity enhancement, short-range communication, unlicensed spectrum communication, IoT (Internet of Things), URLLC (Ultra Reliable Low Latency Communication) network, Internet of Vehicles, etc.); further, adopting a unified solution for different scenarios can also help reduce hardware complexity and cost. In the absence of conflict, the embodiments in the first node of the present application and the features in the embodiments can be applied to any other node, and vice versa. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily. In particular, the interpretation of terminology, nouns, functions, and variables in this application (unless otherwise specified) may refer to the definitions in the 3GPP specification protocols TS38 series and TS37 series.

[0005] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0006] receiving a first message, where the first message includes parameters of a target cell;

[0007] In response to receiving the first message, synchronizing to the target cell;

[0008] The parameters of the target cell include multiple identifiers; and synchronizing to the target cell includes: receiving at least one synchronization signal, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers.

[0009] As an embodiment, any one of the multiple identifiers indicates the target cell.

[0010] As an embodiment, any of the multiple identifiers is not SSB (SS / PBCH (Synchronization signal / Physical broadcast channel))-index.

[0011] As an embodiment, any of the multiple identifiers is an identifier other than the SSB-index.

[0012] As an embodiment, any of the multiple identifiers does not indicate a beam.

[0013] As an embodiment, in a traditional communication system, the parameter configuration for the target cell includes only one identifier; it is contrary to common sense that the parameters for configuring the target cell in the above method include multiple identifiers; wherein the identifier indicates the target cell.

[0014] As an embodiment, the parameters of the target cell described in this application are applied to the multiple identifiers.

[0015] As an embodiment, the above method can simplify the signaling structure and save signaling.

[0016] As an embodiment, the above method can simplify UE (User Equipment) reception and processing, thereby achieving a beneficial effect of power saving.

[0017] As an embodiment, the above method can expand the cell coverage.

[0018] As an embodiment, the above method can improve network deployment flexibility.

[0019] As an embodiment, the above method can simplify the standard support for network devices and UEs deployed with RIS, thereby accelerating the commercial deployment of RIS.

[0020] As an embodiment, the above method can easily achieve backward compatibility.

[0021] As an embodiment, in the present application, at least one synchronization signal is received in the target cell, and the indication of a synchronization signal includes multiple synchronization signals.

[0022] As an embodiment, at least part of the multiple synchronization signals are forwarded via RIS.

[0023] As an embodiment, some of the multiple synchronization signals are forwarded through the RIS, and the remaining synchronization signals of the at least one synchronization signal are not forwarded through the RIS.

[0024] As an embodiment, the at least one synchronization signal includes one synchronization signal, and the one synchronization signal indicates one identifier among the multiple identifiers.

[0025] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, and the multiple synchronization signals indicate the same identifier.

[0026] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, and the multiple synchronization signals include at least two synchronization signals indicating different identifiers.

[0027] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, and any two synchronization signals among the multiple synchronization signals indicate different identifiers.

[0028] As an embodiment, the synchronization to the target cell includes: receiving the at least one synchronization signal in the target cell.

[0029] As an embodiment, the parameter of the target cell is cell specific.

[0030] As an embodiment, the target cell is a candidate cell for cell switching.

[0031] As an embodiment, the first message instructs the first node to communicate through the target cell.

[0032] According to one aspect of the present application, the invention comprises:

[0033] Sending a second message as a response to receiving the first message, wherein the second message indicates completion of the RRC configuration;

[0034] The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

[0035] As an embodiment, the cell that sends the second message is the target cell.

[0036] As an embodiment, the second message is the first RRC (Radio Resource Control) message sent by the first node in the target cell.

[0037] As an embodiment, the second message indicating completion of RRC configuration includes: the second message indicating completion of cell switching, wherein the first message indicates cell switching.

[0038] As an embodiment, the second message indicating the completion of RRC configuration includes: the second message indicating the completion of SCG (Secondary Cell Group) configuration, wherein the first message indicates SCG configuration.

[0039] As an embodiment, as a response to receiving the first message includes: as a response to receiving the second sub-message included in the first message; wherein, the first message includes a first sub-message and the second sub-message, the first sub-message includes the parameters of the target cell, and the second sub-message indicates a cell switching of a protocol layer below layer three.

[0040] As an embodiment, the response to receiving the first message includes: a response to a CHO (Conditional Handover) trigger condition included in the received first message being met; wherein the first message includes a CHO configuration, and the CHO trigger condition is met to trigger the execution of CHO.

[0041] According to one aspect of the present application, the invention comprises:

[0042] The at least one synchronization signal includes multiple synchronization signals, any two synchronization signals among the multiple synchronization signals indicate different identifiers, and the downlink timing of the time unit is the reception time of the first detected path of the time unit.

[0043] As an embodiment, the time unit is a radio frame.

[0044] As an embodiment, the time unit is a subframe.

[0045] As an embodiment, the time unit is a time slot.

[0046] As an embodiment, the time unit is a multi-carrier symbol.

[0047] As an embodiment, a radio frame includes multiple subframes, a subframe includes at least one time slot, and a time slot includes multiple multi-carrier symbols.

[0048] As an embodiment, the multi-carrier symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0049] As an embodiment, the multi-carrier symbol is a DFT (Discrete Fourier Transform)-OFDM symbol.

[0050] According to one aspect of the present application, the invention comprises:

[0051] One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

[0052] As an embodiment, any two sub-signals among the multiple sub-signals respectively include PBCH (Physical broadcast channel) DMRS (DeModulation Reference Signal) sequence indexes that are different.

[0053] As an embodiment, the multiple sub-signals correspond to different SSB-indexes respectively.

[0054] According to one aspect of the present application, the invention comprises:

[0055] A first wireless signal is received in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

[0056] As an embodiment, the first wireless signal is cell-specific.

[0057] As an embodiment, the receiver of the first wireless signal includes multiple nodes.

[0058] As an embodiment, the first wireless signal is a broadcast signal.

[0059] According to one aspect of the present application, the invention comprises:

[0060] The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

[0061] According to one aspect of the present application, the invention comprises:

[0062] A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal is dependent on the identifier, or generation of an RS sequence of a DMRS of the wireless signal is dependent on the identifier.

[0063] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0064] Sending a first message, where the first message includes parameters of the target cell;

[0065] In which, as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; and the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers;

[0066] or,

[0067] Sending at least one synchronization signal, wherein any synchronization signal of the at least one synchronization signal indicates one of a plurality of identifiers;

[0068] In which, a first message is received, the first message includes parameters of the target cell, and the parameters of the target cell include the multiple identifiers; as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the synchronization to the target cell includes: the at least one synchronization signal is received.

[0069] According to one aspect of the present application, the invention comprises:

[0070] The first message is sent by the second node, and the at least one synchronization signal is sent by the second node.

[0071] According to one aspect of the present application, the invention comprises:

[0072] receiving a second message, where the second message is a response to the first message, and the second message indicates completion of the RRC configuration;

[0073] The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

[0074] According to one aspect of the present application, the invention comprises:

[0075] The at least one synchronization signal includes multiple synchronization signals, any two synchronization signals among the multiple synchronization signals indicate different identifiers, and the downlink timing of the time unit is the reception time of the first detected path of the time unit.

[0076] According to one aspect of the present application, the invention comprises:

[0077] One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

[0078] According to one aspect of the present application, the invention comprises:

[0079] A first wireless signal is sent in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

[0080] According to one aspect of the present application, the invention comprises:

[0081] The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

[0082] According to one aspect of the present application, the invention comprises:

[0083] A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal is dependent on the identifier, or generation of an RS sequence of a DMRS of the wireless signal is dependent on the identifier.

[0084] The present application discloses a first node used for wireless communication, characterized by comprising:

[0085] A first receiver receives a first message including parameters of a target cell; and synchronizes to the target cell in response to receiving the first message;

[0086] The parameters of the target cell include multiple identifiers; and synchronizing to the target cell includes: receiving at least one synchronization signal, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers.

[0087] The present application discloses a second node used for wireless communication, characterized by comprising:

[0088] A second transmitter sends a first message, where the first message includes parameters of the target cell;

[0089] In which, as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; and the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers;

[0090] or,

[0091] a third transmitter, transmitting at least one synchronization signal, wherein any synchronization signal of the at least one synchronization signal indicates one of a plurality of identifiers;

[0092] In which, a first message is received, the first message includes parameters of the target cell, and the parameters of the target cell include the multiple identifiers; as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the synchronization to the target cell includes: the at least one synchronization signal is received.

[0093] As an embodiment, the second node includes the second transmitter.

[0094] As a sub-embodiment of the above embodiment, the second node is a base station of a serving cell of the first node before cell switching.

[0095] As a sub-embodiment of the above embodiment, the second node is a master node (MN), and the target cell is a cell in a secondary cell group (SCG).

[0096] As an embodiment, the second node includes the third transmitter.

[0097] As a sub-embodiment of the above embodiment, the second node is a base station of the target cell.

[0098] According to one aspect of the present application, the invention comprises:

[0099] The second node includes the second transmitter and the third transmitter.

[0100] As an embodiment, the second node is a master node, or the second node is a secondary node (SN), and the target cell is an SCell (secondary cell).

[0101] As a sub-embodiment of the above embodiment, the target cell does not belong to a PTAG (Primary Timing Advance Group). BRIEF DESCRIPTION OF THE DRAWINGS

[0102] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0103] FIG1 illustrates a transmission flow chart of a first node according to an embodiment of the present application;

[0104] FIG2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application;

[0105] FIG3 illustrates a schematic diagram of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0106] FIG4 illustrates a schematic diagram of hardware modules of a communication device according to an embodiment of the present application;

[0107] FIG5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application;

[0108] FIG6 illustrates a schematic diagram of the sending timing of the second message and the downlink timing of the time unit occupied by the second message according to an embodiment of the present application;

[0109] FIG7 illustrates a schematic diagram of downlink timing of a time unit according to an embodiment of the present application;

[0110] FIG8 illustrates a schematic diagram of a first synchronization signal according to an embodiment of the present application;

[0111] FIG9 illustrates a schematic diagram of transmitting at least one synchronization signal according to an embodiment of the present application;

[0112] FIG10 illustrates a structural diagram of a processing device in a first node according to an embodiment of the present application;

[0113] FIG11 illustrates a structural diagram of a processing device in a second node according to an embodiment of the present application. DETAILED DESCRIPTION

[0114] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

[0115] Example 1

[0116] Embodiment 1 illustrates a transmission flow chart of a first node according to an embodiment of the present application, as shown in FIG1 .

[0117] In embodiment 1, the first node 100 receives a first message in step 101, and the first message includes parameters of a target cell; in step 102, as a response to receiving the first message, the first node 100 synchronizes to the target cell; wherein the parameters of the target cell include multiple identifiers; the synchronization to the target cell includes: receiving at least one synchronization signal, any one of the at least one synchronization signal indicates one of the multiple identifiers.

[0118] As an embodiment, a first message is received, wherein the first message includes parameters of a target cell.

[0119] As an embodiment, the first message is sent by unicast.

[0120] As an embodiment, the first message includes a high-level message.

[0121] As an embodiment, the first message includes an RRC (Radio Resource Control) message.

[0122] As an embodiment, the first message includes RRCReconfiguration.

[0123] As an embodiment, the first message includes all or part of an IE (Information Element) in an RRC signaling.

[0124] As an embodiment, the first message includes all or part of a field in an IE in an RRC signaling.

[0125] As an embodiment, the first sub-message included in the first message is RRCReconfiguration, and the second sub-message included in the first message is LTM (L1 / L2-triggered mobility) MAC (Medium Access Control) CE (Control Element).

[0126] As an embodiment, the first message includes ServingCellConfigCommon (serving cell common configuration).

[0127] As an embodiment, the first message is ServingCellConfigCommon.

[0128] As an embodiment, the first message is used to configure an SCell (Secondary Cell); wherein the target cell is an SCell.

[0129] As an embodiment, the first message is used to configure an SCG (Secondary Cell Group); wherein the target cell belongs to the SCG.

[0130] As an embodiment, the first message is used to indicate cell switching; wherein the target cell is the target cell of cell switching.

[0131] As an embodiment, the parameters of the target cell include multiple identifiers.

[0132] As an embodiment, the multiple identifiers are indicated one by one by multiple domains, and the names of the multiple domains are the same.

[0133] As an embodiment, the multiple identifiers are configured by the same domain.

[0134] As an embodiment, the multiple identifiers are indicated by the same name.

[0135] As an embodiment, the multiple identifiers are indicated by the same field.

[0136] As an embodiment, any one of the multiple identifiers indicates the target cell.

[0137] As an embodiment, the multiple identifiers are all physical cell identifiers.

[0138] As an embodiment, the multiple identifiers correspond one-to-one to the multiple synchronization signal sequences.

[0139] As an embodiment, the multiple identifiers are corresponded one to one to generate multiple synchronization signals (Synchronization Signal).

[0140] As an embodiment, the multiple identifiers are of the same type.

[0141] As an embodiment, the value ranges of the multiple identifiers are the same.

[0142] As an embodiment, the multiple identifiers correspond one-to-one to multiple values.

[0143] As an embodiment, the values ​​of the multiple identifiers are different from each other.

[0144] As an embodiment, the value of any one of the multiple identifiers is different from the values ​​of other identifiers in the multiple identifiers.

[0145] As an embodiment, each of the multiple identifiers includes Q1 bits, where Q1 is a positive integer.

[0146] As a sub-embodiment of the above embodiment, the first Q2 bits of each of the multiple identifiers are the same, and the remaining Q1-Q2 bits of any two of the multiple identifiers are different, and Q2 is a positive integer smaller than Q1.

[0147] As an embodiment, each of the multiple identifiers is a positive integer.

[0148] As an embodiment, each identifier in the multiple identifiers is a non-negative integer.

[0149] As an embodiment, each of the multiple identifiers is a PCI (Physical Cell Identity).

[0150] As an embodiment, each of the multiple identifiers is an NCI (NR Cell Identity).

[0151] As an embodiment, each of the multiple identifiers is an SSI (Synchronization Signal Identity).

[0152] As an embodiment, each of the multiple identifiers is associated with at least one of a carrier frequency and a bandwidth.

[0153] As an embodiment, the multiple identifiers are associated with the same carrier frequency.

[0154] As an embodiment, the multiple identifiers are associated with the same carrier frequency and the same bandwidth.

[0155] As an embodiment, the multiple identifiers are associated with the same center frequency.

[0156] As an embodiment, the multiple identifiers correspond to multiple RISs respectively.

[0157] As an embodiment, in response to receiving the first message, synchronization is performed to the target cell.

[0158] As an embodiment, the target cell is different from the cell that receives the first message.

[0159] As an embodiment, the synchronization includes downlink synchronization.

[0160] As an embodiment, the synchronization includes obtaining the downlink timing of the time unit.

[0161] As an embodiment, the synchronization includes downlink synchronization and uplink synchronization.

[0162] As an embodiment, the synchronization includes obtaining the downlink timing of the time unit and obtaining the uplink timing of the time unit.

[0163] As an embodiment, the synchronization to the target cell includes: receiving at least one synchronization signal.

[0164] As an embodiment, the synchronization to the target cell includes: receiving at least one synchronization signal on the target cell.

[0165] As an embodiment, receiving a signal on a cell includes: receiving the signal on a radio resource of the cell.

[0166] As an embodiment, the wireless resources include at least one of time domain resources, frequency domain resources, code domain resources and space domain resources.

[0167] As an embodiment, the at least one synchronization signal includes a synchronization signal.

[0168] As an embodiment, the at least one synchronization signal includes multiple synchronization signals.

[0169] As an embodiment, the synchronization signal is SSB.

[0170] As an embodiment, the synchronization signal includes an SS (Synchronization signal) sequence.

[0171] As an embodiment, the synchronization signal includes at least one of a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0172] As an embodiment, the synchronization signal includes PBCH.

[0173] As an embodiment, any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers.

[0174] As an embodiment, a synchronization signal indicating an identifier includes: the synchronization signal implicitly indicating the identifier.

[0175] As an embodiment, a synchronization signal indicating an identifier includes: an SS sequence included in the synchronization signal indicates the identifier.

[0176] As an embodiment, a synchronization signal indicating an identifier includes: a PSS sequence and an SSS sequence included in the synchronization signal jointly indicate the identifier.

[0177] As an embodiment, a synchronization signal indicates an identifier including: a PSS sequence indication included in the synchronization signal The synchronization signal includes an SSS sequence indicating The value of the identifier is

[0178] As an embodiment, the first node can unambiguously obtain the identifier from an SS sequence of a synchronization signal.

[0179] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, and the multiple synchronization signals respectively indicate the multiple identifiers.

[0180] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, and the multiple synchronization signals are respectively transmitted through different RISs.

[0181] Example 2

[0182] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in FIG2 . FIG2 illustrates a diagram of a network architecture 200 for NR 5G, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. NR 5G, LTE, or LTE-A network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other appropriate terminology. The 5GS / EPS 200 may include one or more UEs (User Equipment) 201, an NG-RAN (Next Generation Radio Access Network) 202, a 5G Core Network (5GC) / EPC (Evolved Packet Core) 210, an HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS may interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services. However, those skilled in the art will readily appreciate that the various concepts presented throughout this disclosure can be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes an NR Node B (gNB) 203 and other gNBs 204. The gNB 203 provides user and control plane protocol termination towards the UE 201. The gNB 203 may connect to other gNBs 204 via an Xn interface (e.g., a backhaul link). The XnAP protocol of the Xn interface is used to transmit control plane messages for the wireless network, and the user plane protocol of the Xn interface is used to transmit user plane data. The gNB 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmission Reception Point), or some other appropriate terminology. In a non-terrestrial / satellite network (NTN), the gNB 203 may be a satellite, an aircraft, or a terrestrial base station relayed via a satellite. The gNB 203 provides an access point to the 5GC / EPC 210 for the UE 201.Examples of UE 201 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, an in-vehicle device, an in-vehicle communication unit, a wearable device, or any other similarly functional device. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The gNB 203 connects to the 5GC / EPC 210 via the S1 / NG interface. The 5GC / EPC 210 includes the MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, the S-GW (Service Gateway) / UPF (User Plane Function) 212, and the P-GW (Packet Data Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that handles signaling between the UE 201 and the 5GC / EPC 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to the Internet Services 230. The Internet Services 230 includes operator-specific Internet Protocol services, which may include the Internet, Intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0183] As an embodiment, the UE201 corresponds to the first node in this application.

[0184] As an embodiment, the gNB203 corresponds to the second node in this application.

[0185] As an embodiment, the UE 201 is a user equipment.

[0186] As an embodiment, the UE 201 is a relay node.

[0187] As an embodiment, the gNB203 is a macro cell base station.

[0188] As an embodiment, the gNB203 is a micro cell base station.

[0189] As an embodiment, the gNB203 is a pico cell base station.

[0190] As an embodiment, the gNB203 is a home base station (Femtocell).

[0191] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0192] As an embodiment, the gNB203 is a flying platform device.

[0193] As an embodiment, the gNB203 is a satellite device.

[0194] As an embodiment, the gNB203 is a test device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0195] As an embodiment, the wireless link from the UE201 to the gNB203 is an uplink, and the uplink is used to perform uplink transmission.

[0196] As an embodiment, the wireless link from the gNB203 to the UE201 is a downlink, and the downlink is used to perform downlink transmission.

[0197] As an embodiment, the UE201 and the gNB203 are connected via a Uu air interface.

[0198] As an embodiment, the UE 201 supports a scenario where RIS is deployed.

[0199] As an embodiment, the gNB 203 supports RIS deployment scenarios.

[0200] Example 3

[0201] Embodiment 3 illustrates a schematic diagram of the radio protocol architecture for the user plane and control plane according to one embodiment of the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of the radio protocol architecture for the user plane 350 and control plane 300. FIG3 illustrates the radio protocol architecture for the control plane 300 of the UE and gNB using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2) 305, located above PHY 301, is responsible for the link between the UE and gNB via PHY 301. L2 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304. These sublayers terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection and also supports UE mobility between gNBs. The RLC sublayer 303 provides packet segmentation and reassembly, enabling retransmission of lost packets through ARQ (Automatic Repeat Request). The RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and logical channel multiplexing. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell between UEs. It is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring lower layers using RRC signaling between the gNB and the UE. The wireless protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The wireless protocol architecture in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce wireless transmission overhead.The L2 layer 355 in the user plane 350 also includes an SDAP (Service Data Adaptation Protocol) sublayer 356. The SDAP sublayer 356 is responsible for mapping QoS flows and data radio bearers (DRBs) to support service diversity. The UE's radio protocol architecture in the user plane 350 may include the SDAP sublayer 356, the PDCP sublayer 354, some or all of the RLC sublayer 353 and the MAC sublayer 352 at the L2 layer. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, server, etc.).

[0202] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node in this application.

[0203] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node in this application.

[0204] As an embodiment, the first message in this application is generated in the RRC306.

[0205] As an embodiment, the second message in this application is generated in the RRC306.

[0206] As an embodiment, the at least one signal in the present application is generated by the PHY 301 or the PHY 351 .

[0207] As an embodiment, the first wireless signal in the present application is generated by the PHY301 or the PHY351.

[0208] As an embodiment, the L2 layer 305 belongs to a higher layer.

[0209] As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0210] Example 4

[0211] Embodiment 4 illustrates a hardware module diagram of a communication device according to an embodiment of the present application, as shown in FIG4. FIG4 is a block diagram of a first communication device 450, a second communication device 410, and a third communication device 490 communicating with each other in an access network.

[0212] The first communication device 450 includes a controller / processor 459 , a memory 460 , a data source 467 , a transmit processor 468 , a receive processor 456 , a multi-antenna transmit processor 457 , a multi-antenna receive processor 458 , a transmitter / receiver 454 and an antenna 452 .

[0213] The second communication device 410 includes a controller / processor 475 , a memory 476 , a data source 477 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 and an antenna 420 .

[0214] The third communication device 490 includes a control component 491 , an information component 496 , a memory 495 , and a reflective surface 492 .

[0215] During transmission from the second communications device 410 to the first communications device 450, at the second communications device 410, upper layer data packets from the core network or from a data source 477 are provided to a controller / processor 475. The core network and data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements L2 layer functionality. During transmission from the second communications device 410 to the first communications device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communications device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0216] During transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various L1 signal processing functions. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain using a fast Fourier transform (FFT). In the frequency domain, the receive processor 456 demultiplexes the physical layer data signal and reference signal, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. During transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover higher layer data packets from the second communication device 410. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0217] During transmission from the first communications device 450 to the second communications device 410, upper layer data packets are provided to the controller / processor 459 at the first communications device 450 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functionality at the second communications device 410 described in the transmission from the second communications device 410 to the first communications device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, implementing L2 layer functions for both the user plane and the control plane. The controller / processor 459 is also responsible for retransmission of lost packets and signaling to the second communications device 410. The transmit processor 468 performs modulation mapping and channel coding, while the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 468 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 457, the stream is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a RF symbol stream before providing it to the antenna 452.

[0218] During transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the reception functionality at the first communication device 450 described for transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives RF signals via its corresponding antenna 420, converts the received RF signals into baseband signals, and provides the baseband signals to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the L1 layer functionality. The controller / processor 475 implements the L2 layer functionality. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. During transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the first communication device 450. The controller / processor 475 may provide upper layer data packets to the core network or all protocol layers above the L2 layer, and may also provide various control signals to the core network or L3 for L3 processing.

[0219] The third communication device 490 can be controlled by the first communication device 450 and / or the second communication device 410 to change channel implementation in a controlled manner, improve channel diversity, and provide robustness to channel blocking / fading. The first communication device 450 or the second communication device 410 can be referred to as a control node for the third communication device 490. At least one of the transmit processor 468, receive processor 456, and controller / processor 459 of the first communication device 450 can be configured to perform various aspects in conjunction with the information component 496 or controller component 491 of the third communication device 490, or at least one of the transmit processor 416, receive processor 470, and controller / processor 475 of the second communication device 410 can be configured to perform various aspects in conjunction with the information component 496 or controller component 491 of the third communication device 490.

[0220] The first communication device 450 and / or the second communication device 410 use the third communication device 490 to perform communication, sensing, and / or positioning functions. Information about the third communication device 490 may be known to the network based on network planning, and the base station may provide the location of the third communication device 490 and other information about the third communication device 490 to other nodes (e.g., terminals in a cellular cell). For example, the base station may transmit the information about the third communication device 490 in system information. Each terminal within the coverage area of ​​the cellular cell may receive the system information to discover the existence, location, capabilities, or other information about the third communication device 490.

[0221] During transmission when the first communication device 450 and / or the second communication device 410 communicates using the third communication device 490, a plurality of resonant elements form a reflection surface 492 at the third communication device 490 to receive a downlink signal from the first communication device 450 or an uplink signal from the second communication device 410. Each resonant element can adjust (e.g., apply a phase shift to directionally reflect the received signal) the corresponding received signal. The control component 491 can configure phase or amplitude changes by applying precoding weights to each resonant element, so that the third communication device 490 can reradiate the output beam in different directions given a specific input beam.

[0222] In some cases, when the third communication device 490 operates passively to merely reflect or refract a beam from a transmitter to a receiver, the third communication device 490 can function as a nearly passive device, operating without significant power consumption. In some cases, the direction of reflection or refraction can be controlled by a control node or network controller.

[0223] In the transmission from the control node and the third communication device 490, at the third communication device 490, the information component 496 receives the signal from the control node and further processes the received signal (e.g., digitizes the received signal), and provides the processed signal to the control component 491. At the third communication device 490, the information / data of the control component 491 is provided to the information component 496 for processing and then sent or provided to the control node. The third communication device 490 may include a memory 495 configured to temporarily store the modulation configuration and corresponding time slot provided by the control node.

[0224] As an embodiment, the third communication device 490 includes: at least one control component and at least one reflective surface, the at least one control component including computer program code; the at least one control component and the computer program code are configured for use with the at least one reflective surface. The third communication device 490 is configured to at least: receive a first message and receive at least one synchronization signal.

[0225] As an embodiment, the third communication device 490 includes: a control component storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one information component, and the action includes: receiving a first message and receiving at least one synchronization signal.

[0226] As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 apparatus at least: receives a first message, the first message including parameters of a target cell; synchronizes to the target cell in response to receiving the first message; wherein the parameters of the target cell include multiple identifiers; the synchronization to the target cell includes: receiving at least one synchronization signal, any one of the at least one synchronization signal indicating one of the multiple identifiers.

[0227] As an embodiment, the first communication device 450 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, the action including: receiving a first message, the first message including parameters of a target cell; synchronizing to the target cell in response to receiving the first message; wherein the parameters of the target cell include multiple identifiers; synchronizing to the target cell includes: receiving at least one synchronization signal, any one of the at least one synchronization signal indicating one of the multiple identifiers.

[0228] As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the second communication device 410 apparatus at least: sends a first message, the first message including parameters of the target cell;

[0229] In which, as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; and the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers;

[0230] or,

[0231] Sending at least one synchronization signal, wherein any synchronization signal of the at least one synchronization signal indicates one of a plurality of identifiers;

[0232] In which, a first message is received, the first message includes parameters of the target cell, and the parameters of the target cell include the multiple identifiers; as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the synchronization to the target cell includes: the at least one synchronization signal is received.

[0233] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, the actions including: sending a first message, wherein the first message includes parameters of a target cell;

[0234] In which, as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; and the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers;

[0235] or,

[0236] Sending at least one synchronization signal, wherein any synchronization signal of the at least one synchronization signal indicates one of a plurality of identifiers;

[0237] In which, a first message is received, the first message includes parameters of the target cell, and the parameters of the target cell include the multiple identifiers; as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the synchronization to the target cell includes: the at least one synchronization signal is received.

[0238] As an embodiment, the first node in this application corresponds to the first communication device 450.

[0239] As an embodiment, the second node in this application corresponds to the second communication device 410.

[0240] As an embodiment, the second node in the present application includes at least the former of the second communication device 410 and the third communication device 490 .

[0241] As an embodiment, the first communication device 450 is a UE.

[0242] As an embodiment, the first communication device 450 is a layer 2U2N remote UE.

[0243] As an embodiment, the first communication device 450 is a layer 3 relay node.

[0244] As an embodiment, the second communication device 410 is a base station.

[0245] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first message in this application.

[0246] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the first message in this application.

[0247] As an embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller / processor 459 is used to send the second message in this application.

[0248] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the second message in this application.

[0249] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to transmit the first wireless signal in this application.

[0250] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the first wireless signal in this application.

[0251] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send at least one synchronization signal in the present application.

[0252] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive at least one synchronization signal in the present application.

[0253] As an embodiment, at least one of the control component 491, the information component 496, the memory 495 or the reflection surface 492 is used for controlled forwarding of the first message in the present application.

[0254] As an embodiment, at least one of the control component 491, the information component 496, the memory 495 or the reflection surface 492 is used for controlled forwarding of the second message in the present application.

[0255] As an embodiment, at least one of the control component 491, the information component 496, the memory 495 or the reflective surface 492 is used to controllably forward at least one synchronization signal in the present application.

[0256] Example 5

[0257] Example 5 illustrates a wireless signal transmission flow chart according to one embodiment of the present application, as shown in Figure 5. In Figure 5, a first node N51 communicates with a second transmitter N52, a third transmitter N53, and a second receiver N54 via an air interface. It should be noted that the order in this example does not limit the signal transmission sequence and implementation order in this application.

[0258] For the first node N51, a first message is received in step S511; at least one synchronization signal is received in step S512; a second message is sent in step S513; and a first wireless signal is received in step S514.

[0259] For the second transmitter N52, a first message is sent in step S521.

[0260] For the third transmitter N53, at least one synchronization signal is sent in step S531; and a first wireless signal is sent in step S532.

[0261] For the second receiver N54, the second message is received in step S541.

[0262] In Example 5, a first message is received, the first message including parameters of a target cell; as a response to receiving the first message, synchronization is performed to the target cell; wherein the parameters of the target cell include multiple identifiers; synchronization to the target cell includes: receiving at least one synchronization signal, any one of the at least one synchronization signal indicates one of the multiple identifiers; as a response to receiving the first message, a second message is sent, the second message indicating completion of RRC configuration; wherein the sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal; a first wireless signal is received in the target cell, the first wireless signal is associated with one of the multiple identifiers; the parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong; a wireless signal is associated with an identifier including: the scrambling code of the wireless signal depends on the identifier, or the generation of the RS sequence of the DMRS of the wireless signal depends on the identifier.

[0263] As an embodiment, the first node N51 communicates with the third transmitter N53 through the target cell.

[0264] As an embodiment, the first node N51 communicates with the second transmitter N52 through a cell outside the target cell, and the first node N51 and the second receiver N54 communicate with each other through the cell outside the target cell.

[0265] As a sub-embodiment of the above embodiment, the first message is used to configure the SCell, or the first message is used to configure the SCG.

[0266] As an embodiment, the first node N51 communicates with the second transmitter N52 through a cell outside the target cell, and the first node N51 and the second receiver N54 communicate with each other through the target cell.

[0267] As a sub-embodiment of the above embodiment, the first message indicates cell switching, or the first message is used to configure SCG.

[0268] As an embodiment, the second transmitter N52, the third transmitter N53 and the second receiver N54 belong to the same base station.

[0269] As a sub-embodiment of the above embodiment, the second transmitter N52 and the third transmitter N53 are the same transmitter.

[0270] As an embodiment, the second transmitter N52 and the third transmitter N53 do not belong to the same base station, and the third transmitter N53 and the second receiver N54 belong to the same base station.

[0271] As an embodiment, as a response to receiving the first message, a second message is sent, and the second message indicates that the RRC configuration is completed.

[0272] As an embodiment, the second message is a high-level message.

[0273] As an embodiment, the second message is RRC (Radio Resource Control) signaling.

[0274] As an embodiment, the second message is RRCReconfigurationComplete (RRC reconfiguration completed).

[0275] As an embodiment, the second message includes all or part of an IE (Information Element) in an RRC signaling.

[0276] As an embodiment, the second message includes all or part of a field in an IE in an RRC signaling.

[0277] As an embodiment, the second message includes scg-Response (SCG response).

[0278] As an embodiment, the second message is sent on the target cell.

[0279] As an embodiment, the sending timing of the second message depends on the downlink timing of the time unit occupied by the second message.

[0280] As an embodiment, the downlink timing of the time unit occupied by the second message is used to determine the sending timing of the second message.

[0281] As an embodiment, the sending timing of the second message is related to the downlink timing of the time unit occupied by the second message.

[0282] As an embodiment, the time unit occupied by the second message is a radio frame.

[0283] As an embodiment, the time unit occupied by the second message is a subframe.

[0284] As an embodiment, the time unit occupied by the second message is a time slot.

[0285] As an embodiment, the time unit occupied by the second message is at least one multi-carrier symbol.

[0286] As an embodiment, the sending timing of the second message includes the time of sending the second message.

[0287] As an embodiment, the sending timing of the second message includes the starting time of sending the second message.

[0288] As an embodiment, the downlink timing of the time unit includes the time for performing downlink reception in the time unit.

[0289] As an embodiment, the downlink timing of the time unit includes the start time of performing downlink reception in the time unit.

[0290] As an embodiment, the first node determines the sending timing of the second message by itself.

[0291] As an embodiment, the first node independently determines the downlink timing of the time unit occupied by the second message.

[0292] As an embodiment, the first node determines the downlink timing of the time unit occupied by the second message based on a received GPS (Global Positioning System) signal; the GPS signal does not belong to the at least one synchronization signal.

[0293] As an embodiment, the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

[0294] As an embodiment, the downlink timing of the time unit is related to the at least one synchronization signal received.

[0295] As an embodiment, the reception of the at least one synchronization signal is used to determine the downlink timing of the time unit.

[0296] As an embodiment, the at least one synchronization signal includes multiple synchronization signals.

[0297] As an embodiment, each synchronization signal in the multiple synchronization signals indicates the same identifier.

[0298] As an embodiment, at least two synchronization signals among the multiple synchronization signals indicate different identifiers.

[0299] As an embodiment, any two synchronization signals among the multiple synchronization signals indicate different identifiers.

[0300] As an embodiment, a first wireless signal is received in the target cell.

[0301] As an embodiment, the first wireless signal is a downlink signal.

[0302] As an embodiment, the logical channel occupied by the first wireless signal is BCCH (Broadcast Control Channel).

[0303] As an embodiment, the physical channel occupied by the first wireless signal is a PDSCH (Physical Downlink Shared CHannel).

[0304] As an embodiment, the bit block generating the first wireless signal is mapped to the BCCH when being transferred between the MAC sublayer and the RLC (Radio Link Control) sublayer.

[0305] As an embodiment, the bit block generating the first wireless signal is mapped to a DL-SCH (Downlink Shared CHannel) when being transmitted between the MAC sublayer and layer 1.

[0306] As an embodiment, the first wireless signal includes a SIB (System Information Block).

[0307] As an embodiment, the first wireless signal includes SIB1 (System Information Block 1).

[0308] As an embodiment, the first wireless signal is a broadcast signal.

[0309] As an embodiment, the first wireless signal is specific to the target cell.

[0310] As an embodiment, the first wireless signal is associated with one of the multiple identifiers.

[0311] As an embodiment, the scrambling code of the first wireless signal depends on an identifier, and the identifier is one of the multiple identifiers.

[0312] As an embodiment, the scrambling code of the control signaling for scheduling the first wireless signal depends on an identifier, and the identifier is one of the multiple identifiers.

[0313] As an embodiment, a wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier, or generation of a RS (Reference Signal) sequence of a DMRS of the wireless signal depends on the identifier.

[0314] As an embodiment, a wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier.

[0315] As an embodiment, associating a wireless signal with an identifier includes: the identifier is used to generate a scrambling code for the wireless signal.

[0316] As a sub-embodiment of the above two embodiments, the identifier is used to generate a scrambling sequence, the scrambling sequence is used to scramble a bit block, and the bit block is used to generate the wireless signal.

[0317] As an embodiment, all or part of the bits included in the bit block are sequentially subjected to CRC calculation (CRC Calculation), channel coding (Channel Coding), rate matching (Rate matching), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), antenna port mapping (Antenna Port Mapping), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation up conversion (Modulation and Up conversion) to obtain the wireless signal.

[0318] As an embodiment, a wireless signal is associated with an identifier, including: generation of an RS sequence of a DMRS of the wireless signal depends on the identifier.

[0319] As an embodiment, a wireless signal is associated with an identifier, including: the identifier is used to generate an RS sequence of a DMRS of the wireless signal.

[0320] As a sub-embodiment of the above two embodiments, the identifier is used to generate a pseudo-random sequence, the pseudo-random sequence is used to generate an RS sequence, and the RS sequence is used for a DMRS of a wireless signal.

[0321] As an embodiment, the parameters of the target cell include configuration information specific to the target cell.

[0322] As an embodiment, the target cell-specific configuration information includes downlink common configuration (DownlinkConfigComm).

[0323] As an embodiment, the target cell-specific configuration information includes uplink common configuration (UplinkConfigComm).

[0324] As an embodiment, the target cell-specific configuration information includes ssb-PositionsInburst (position of synchronization signal / physical broadcast channel in burst).

[0325] As an embodiment, the target cell-specific configuration information includes ssb-periodicityServingCell (synchronization signal / physical broadcast channel period of the serving cell).

[0326] As an embodiment, the target cell-specific configuration information includes generation parameters of the first wireless signal.

[0327] As an embodiment, the parameters of the target cell include a BWP (BandWidth Part) to which the frequency domain resources occupied by the first wireless signal belong.

[0328] As an embodiment, the first wireless signal is received in the BWP.

[0329] As an embodiment, the BWP is a downlink common BWP.

[0330] As an embodiment, the BWP is an initial downlink BWP.

[0331] Example 6

[0332] Example 6 illustrates a schematic diagram of the sending timing of the second message and the downlink timing of the time unit occupied by the second message according to an embodiment of the present application, as shown in Figure 6.

[0333] As an embodiment, due to the delay introduced by the propagation of the wireless signal in the air, the timing of sending and receiving the wireless signal occupying one time unit is different.

[0334] Specifically, taking a time unit as a subframe and the sending or receiving of a wireless signal occupying a subframe n as an example, the time for receiving the wireless signal from the subframe n in the downlink is different from the time for sending the wireless signal in the subframe n in the uplink; wherein n is a positive integer.

[0335] As an embodiment, the downlink timing of the time unit occupied by the second message is the starting time of performing downlink reception in the time unit occupied by the second message.

[0336] Specifically, the time unit occupied by the second message is subframe m, and the downlink timing of the subframe m is the start time of performing downlink reception in the subframe m; wherein m is a positive integer.

[0337] As an embodiment, the sending timing of the second message is the starting time of sending the second message.

[0338] As an embodiment, the sending timing of the second message is no later than the downlink timing of the time unit occupied by the second message.

[0339] Specifically, the starting time of the downlink timing of the time unit occupied by the second message is t0, the starting time of the sending timing of the second message is t1, and t1 is not later than t0.

[0340] As an embodiment, the sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the sending timing of the second message also depends on the wireless propagation delay between the first node and the receiver of the second message.

[0341] As an embodiment, the sending timing of the second message is the downlink timing of the time unit occupied by the second message.

[0342] The above embodiment is applicable to a scenario where the distance between the first node and the receiver of the second message is relatively small, and in this case, the wireless propagation delay between the first node and the receiver of the second message can be ignored.

[0343] As an embodiment, the sending timing of the second message is the downlink timing of the time unit occupied by the second message minus a timing advance value.

[0344] As an embodiment, the timing advance value is 0.

[0345] As an embodiment, the timing advance value is greater than 0.

[0346] As an embodiment, the one timing advance value depends on a last received timing advance command (TAC), and the timing advance command indicates the one timing advance value.

[0347] As an embodiment, the timing advance command is sent by the second transmitter N52 in Example 5.

[0348] As an embodiment, the timing advance command is sent by the third transmitter N53 in Example 5.

[0349] As an embodiment, the timing advance command is obtained during a random access process.

[0350] As an embodiment, the one timing advance value depends on the cell that sends the second message.

[0351] As an embodiment, the timing advance value depends on the TAG (Timing Advance Group) to which the cell sending the second message belongs.

[0352] As an embodiment, the timing advance value is (N TA +N TA offset )×T C ; wherein, the N TA Indicated by the timing advance command, the N TA offset The T is determined by looking up a table based on the duplex mode and frequency range of the cell that sends the second message; C =1 / (Δf max ·N f ), where Δf max =480·10 3 Hz (Hertz), N f=4096.

[0353] In the accompanying drawings of Example 6, the timing advance value is greater than 0, and the sending timing of the second message is earlier than the downlink timing of the time unit occupied by the second message.

[0354] Example 7

[0355] Example 7 illustrates a schematic diagram of downlink timing of a time unit according to an embodiment of the present application, as shown in FIG7 .

[0356] As an embodiment, the downlink timing of the time unit occupied by the second message depends on the reception of the at least one synchronization signal.

[0357] As an embodiment, any two of the identifiers indicated by the at least one synchronization signal are different.

[0358] As an embodiment, at least two of the identifiers indicated by the at least one synchronization signal are different.

[0359] As an embodiment, the identifiers indicated by the at least one synchronization signal are all the same.

[0360] Specifically, a synchronization signal is detected in a detection window, and the reception time of the first detected path of the synchronization signal is determined, the synchronization signal is one of the at least one synchronization signal, and the synchronization signal indicates the position of the first symbol occupied by the synchronization signal in the wireless frame, and the downlink timing of the wireless frame is determined based on the reception time of the first detected path of the synchronization signal and the position of the first symbol occupied by the synchronization signal in the wireless frame.

[0361] Specifically, the synchronization signal indicates the position of the first symbol occupied by the synchronization signal in a wireless frame, including: the synchronization signal indicates a reference signal index, and the reference signal index indicates the position of the synchronization signal in a burst; wherein, the burst includes multiple synchronization signals, and the position of the first symbol occupied by each synchronization signal included in the burst in a wireless frame is predefined.

[0362] Specifically, the reception time of the first detected path of the synchronization signal is t2, the synchronization signal indicates that the reference signal index is 1, and the reference signal index indicates that the first symbol occupied by the synchronization signal is the 9th symbol in the radio frame, thereby determining the start time of the radio frame to be t2-8×T symbol, wherein the T symbol The duration of a symbol.

[0363] As an embodiment, the wireless frame includes at least one time unit, and the downlink timing of each time unit included in the wireless frame is determined according to the downlink timing of the wireless frame, and the duration of each time unit is the same.

[0364] As an embodiment, the detection window includes a duration of half a wireless frame.

[0365] As an embodiment, the duration of a wireless frame is 10 milliseconds.

[0366] As an embodiment, the reference signal index is an SSB-index.

[0367] As an embodiment, the reference signal index is a candidate SSB-index.

[0368] As an embodiment, the reference signal index is an NZP (Non Zero Power)-CSI (Channel Status Information)-RS (Reference Signal) identifier.

[0369] As an embodiment, the reference signal index is a DMRS identifier.

[0370] As an embodiment, the method for the downlink timing of the time unit may refer to Chapter 4 of the TS38.213 protocol of the 3GPP standard.

[0371] As an embodiment, the method for the downlink timing of the time unit may refer to Chapter 7 of the TS38.133 protocol of the 3GPP standard.

[0372] As an embodiment, since wireless signals experience different propagation paths when transmitted in the air, the receiver will receive the wireless signals at multiple times, where the earliest received wireless signal corresponds to the first detected path, the second received wireless signal corresponds to the second detected path, and so on.

[0373] As an embodiment, the downlink timing of the time unit is the reception time of the first detected path of the time unit, including: a downlink wireless signal is sent in the time unit, and the downlink timing of the time unit is the reception time of the first detected path of the downlink wireless signal.

[0374] Specifically, taking the time unit as a time slot as an example, the transmitter of the second node sends a wireless signal in the time slot, and the time of the first path of the wireless signal received by the first node is the downlink timing of the time slot.

[0375] Specifically, since a wireless signal may have multiple propagation paths after being sent from a transmitter to a receiver, the downlink timing depends on the reception time of the first detected path of the wireless signal.

[0376] As an embodiment, the first detected path is the earliest detected path in terms of time.

[0377] In the accompanying drawings of Example 7, a downlink wireless signal is sent in a time unit, and the first time axis shows the L detected paths of the downlink wireless signal, where L is a positive integer greater than 1; the time when the L paths of the downlink wireless signal arrive at the first node is different; the second time axis shows that the downlink timing of the time unit is the reception time of the first detected path among the L paths of the downlink wireless signal.

[0378] As an embodiment, the downlink timing of the time unit is independent of the identifier indicated in the at least one synchronization signal.

[0379] Example 8

[0380] Embodiment 8 illustrates a schematic diagram of a first synchronization signal according to an embodiment of the present application, as shown in Figure 8. In Figure 8, the first synchronization signal includes Q sub-signals, where Q is a positive integer greater than 1.

[0381] As an embodiment, one of the at least one synchronization signal is a first synchronization signal, and the first synchronization signal includes multiple sub-signals.

[0382] As an embodiment, any sub-signal among the multiple sub-signals is SSB.

[0383] As an embodiment, any sub-signal among the multiple sub-signals includes an SS sequence.

[0384] As an embodiment, any sub-signal among the multiple sub-signals includes at least one of a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0385] As an embodiment, any sub-signal among the multiple sub-signals includes PBCH.

[0386] As an embodiment, each sub-signal in the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers.

[0387] As an embodiment, the meaning of one sub-signal indicating one identifier is the same as that of one synchronization signal indicating one identifier, which will not be repeated here.

[0388] As an embodiment, the multiple sub-signals are respectively indicated by multiple reference signal indexes that are different in pairs.

[0389] As an embodiment, the reference signal index is an SSB-index.

[0390] As an embodiment, the reference signal index is a candidate SSB-index.

[0391] As an embodiment, the reference signal index is an NZP-CSI-RS identifier.

[0392] As an embodiment, the reference signal index is a DMRS identifier.

[0393] As an embodiment, the multiple sub-signals correspond to multiple beams respectively.

[0394] As an embodiment, the multiple sub-signals are orthogonal in the time domain.

[0395] As an embodiment, the multiple sub-signals occupy the same frequency domain resources.

[0396] As an embodiment, any two sub-signals among the multiple sub-signals are spatially uncorrelated.

[0397] As an embodiment, the two sub-signals being spatially uncorrelated includes: TCI (Transmission Configuration Indicator) states of the two sub-signals are different.

[0398] As an embodiment, the two sub-signals being spatially uncorrelated includes: the two sub-signals are not quasi co-located.

[0399] As an embodiment, the two sub-signals being spatially uncorrelated includes: the two sub-signals having different spatial transmission parameters.

[0400] As an embodiment, the two sub-signals being spatially uncorrelated includes: the two sub-signals having different spatial reception parameters.

[0401] As an embodiment, the two sub-signals being spatially uncorrelated includes: the spatial domain filters of the two sub-signals are different.

[0402] As an embodiment, the two sub-signals being spatially uncorrelated includes: antenna ports of the two sub-signals are different.

[0403] As an embodiment, the two sub-signals being spatially uncorrelated includes: the two sub-signals are pre-coded differently.

[0404] As an embodiment, the two sub-signals being spatially uncorrelated includes: the spatial characteristics of the channel experienced by one of the two sub-signals cannot be inferred from the spatial characteristics of the channel experienced by the other sub-signal of the two sub-signals.

[0405] As an embodiment, the spatial characteristic includes a TCI (Transmission configuration indicator) state.

[0406] As an embodiment, the spatial characteristics include a QCL (Quasi co-location) assumption.

[0407] As an embodiment, the spatial characteristics include QCL parameters.

[0408] As an embodiment, the QCL parameter includes at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameter.

[0409] As an embodiment, the QCL parameters may be specifically referred to Chapter 5 of the TS38.214 protocol of the 3GPP standard.

[0410] Example 9

[0411] Embodiment 9 illustrates a schematic diagram of transmitting at least one synchronization signal according to an embodiment of the present application, as shown in FIG9 . In FIG9 , the first node is a UE, the second node is a base station, and the first node receives the at least one synchronization signal from the second node. FIG9 shows the propagation path of the at least one synchronization signal.

[0412] As an embodiment, one of the at least one synchronization signal is forwarded via a RIS.

[0413] As an embodiment, one of the at least one synchronization signal is not forwarded via the RIS.

[0414] As an embodiment, the RIS is the third communication device 490 in Embodiment 4.

[0415] As an embodiment, each synchronization signal of the at least one synchronization signal indicates the target cell, and the target cell is maintained by the second node.

[0416] As an embodiment, each of the at least one synchronization signal includes at least one sub-signal, each sub-signal in the at least one sub-signal indicates the same identifier, and the identifier is one of the multiple identifiers; any two sub-signals in the at least one sub-signal are spatially uncorrelated; each sub-signal in the at least one sub-signal includes at least one transmission path; the reception of the at least one synchronization signal is used to determine the downlink timing of the first node when transmitting in the target cell.

[0417] In case A of Example 9, the at least one synchronization signal includes P synchronization signals, and the P synchronization signals are forwarded through P RISs respectively; wherein, synchronization signal #1 is forwarded through RIS#1, indicating the identifier #1, and so on, synchronization signal #P is forwarded through RIS#P, indicating the identifier #P.

[0418] In situation B of embodiment 9, the at least one synchronization signal includes P synchronization signals, some of the P synchronization signals are forwarded through RIS, and some of the synchronization signals are not forwarded through RIS; wherein, synchronization signal #1 is forwarded through RIS#1, indicating the identifier #1, and synchronization signal #P is not forwarded through RIS, indicating the identifier #P.

[0419] As an embodiment, the deployment of the RIS is transparent to the first node.

[0420] As an embodiment, the second node configures a synchronization signal transmitted via RIS.

[0421] As an embodiment, the second node configures a synchronization signal that is not transmitted through RIS.

[0422] As an embodiment, the above method can improve UE reception robustness.

[0423] As an embodiment, the above method can improve channel transmission characteristics.

[0424] As an embodiment, the above method can provide flexible network device deployment.

[0425] Example 10

[0426] Embodiment 10 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in FIG10. In FIG10, the first node processing device 1000 includes a first receiver 1001 and a first transmitter 1002. The first node 1000 is a UE.

[0427] In embodiment 10, a first receiver 1001 receives a first message, which includes parameters of a target cell; and synchronizes to the target cell in response to receiving the first message; wherein the parameters of the target cell include multiple identifiers; and synchronizing to the target cell includes: receiving at least one synchronization signal, any one of the at least one synchronization signal indicating one of the multiple identifiers.

[0428] As an embodiment, the first transmitter 1002 sends a second message in response to receiving the first message, and the second message indicates the completion of the RRC configuration; wherein the sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

[0429] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, any two synchronization signals among the multiple synchronization signals indicate different identifiers, and the downlink timing of the time unit is the reception time of the first detected path of the time unit.

[0430] As an embodiment, one of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each sub-signal in the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two sub-signals in the multiple sub-signals are spatially uncorrelated.

[0431] As an embodiment, the first receiver 1001 receives a first wireless signal in the target cell, and the first wireless signal is associated with one of the multiple identifiers.

[0432] As an embodiment, the first receiver 1001 receives a first wireless signal in the target cell, the first wireless signal is associated with one of the multiple identifiers, and the parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

[0433] As an embodiment, a wireless signal is associated with an identifier, including: a scrambling code of the wireless signal is dependent on the identifier, or generation of an RS sequence of a DMRS of the wireless signal is dependent on the identifier.

[0434] As an embodiment, the first receiver 1001 includes the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 and the controller / processor 459 in FIG. 4 of the present application.

[0435] As an embodiment, the first receiver 1001 includes at least one of the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 or the controller / processor 459 in FIG. 4 of the present application.

[0436] As an embodiment, the first transmitter 1002 includes the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 and the controller / processor 459 in FIG. 4 of the present application.

[0437] As an embodiment, the first transmitter 1002 includes at least one of the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 or the controller / processor 459 in FIG. 4 of the present application.

[0438] Example 11

[0439] Embodiment 11 illustrates a block diagram of a processing device in a second node according to an embodiment of the present application, as shown in FIG11 . In FIG11 , the second receiver 1101, the second transmitter 1102, and the third transmitter 1103 are all optional. The second node processing device 1100 includes the second transmitter 1102, or the second node processing device 1100 includes the second receiver 1101 and the third transmitter 1103, or the second node processing device 1100 includes the second receiver 1101, the second transmitter 1102, and the third transmitter 1103. When the second node processing device 1100 includes the second transmitter 1102 and the third transmitter 1103, the second transmitter 1102 and the third transmitter 1103 may be the same transmitter. The second node 1100 is a base station.

[0440] In embodiment 11, the second transmitter 1102 sends a first message, where the first message includes parameters of the target cell;

[0441] In which, as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; and the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers;

[0442] or,

[0443] The third transmitter 1103 sends at least one synchronization signal, where any synchronization signal in the at least one synchronization signal indicates one of the multiple identifiers;

[0444] In which, a first message is received, the first message includes parameters of the target cell, and the parameters of the target cell include the multiple identifiers; as a response to the first message being received, the recipient of the first message is synchronized to the target cell; the synchronization to the target cell includes: the at least one synchronization signal is received.

[0445] As an embodiment, the second node includes the second transmitter and the third transmitter.

[0446] As an embodiment, a second receiver 1101 receives a second message, which is a response to the first message, and the second message indicates the completion of the RRC configuration; wherein the sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

[0447] As an embodiment, the at least one synchronization signal includes multiple synchronization signals, any two synchronization signals among the multiple synchronization signals indicate different identifiers, and the downlink timing of the time unit is the reception time of the first detected path of the time unit.

[0448] As an embodiment, one of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each sub-signal in the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two sub-signals in the multiple sub-signals are spatially uncorrelated.

[0449] As an embodiment, the second transmitter 1102 sends a first wireless signal in the target cell, and the first wireless signal is associated with one of the multiple identifiers.

[0450] As an embodiment, the third transmitter 1103 sends a first wireless signal in the target cell, and the first wireless signal is associated with one of the multiple identifiers.

[0451] As an embodiment, the second transmitter 1102 sends a first wireless signal in the target cell, and the first wireless signal is associated with one of the multiple identifiers; the parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

[0452] As an embodiment, the third transmitter 1103 sends a first wireless signal in the target cell, and the first wireless signal is associated with one of the multiple identifiers; the parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

[0453] As an embodiment, a wireless signal is associated with an identifier, including: a scrambling code of the wireless signal is dependent on the identifier, or generation of an RS sequence of a DMRS of the wireless signal is dependent on the identifier.

[0454] As an embodiment, the second receiver 1101 includes the receiver 418 (including the antenna 420 ), the receiving processor 470 , the multi-antenna receiving processor 472 and the controller / processor 475 in FIG. 4 of the present application.

[0455] As an embodiment, the second receiver 1101 includes at least one of the receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 or the controller / processor 475 in FIG. 4 of the present application.

[0456] As an embodiment, the second transmitter 1102 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller / processor 475 in FIG. 4 of the present application.

[0457] As an embodiment, the second transmitter 1102 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475 in FIG. 4 of the present application.

[0458] As an embodiment, the third transmitter 1103 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller / processor 475 in FIG. 4 of the present application.

[0459] As an embodiment, the third transmitter 1103 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475 in FIG. 4 of the present application.

[0460] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. The present application is not limited to any specific form of combination of software and hardware. The first type of communication node or UE or terminal in the present application includes but is not limited to mobile phones, tablets, notebooks, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, NB-IoT devices, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The second type of communication node or base station or network-side device in the present application includes but is not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception nodes TRPs (Transmission and Reception Points), relay satellites, satellite base stations, aerial base stations and other wireless communication devices.

[0461] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first receiver receives a first message, wherein the first message includes parameters of a target cell; In response to receiving the first message, synchronizing to the target cell; The parameters of the target cell include multiple identifiers; and the synchronization to the target cell includes: receiving at least one synchronization signal, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers.

2. The first node according to claim 1, characterized in that: include: The first transmitter sends a second message in response to receiving the first message, wherein the second message indicates completion of the RRC configuration; The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

3. The first node according to claim 2, characterized in that: The at least one synchronization signal includes a plurality of synchronization signals, any two synchronization signals among the plurality of synchronization signals indicate different identifiers, and the downlink timing of the time unit is a reception time of a first detected path of the time unit.

4. The first node according to any one of claims 1 to 3, characterized in that: One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

5. The first node according to any one of claims 1 to 4, characterized in that: include: The first receiver receives a first wireless signal in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

6. The first node according to claim 5, characterized in that: The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

7. The first node according to any one of claims 1 to 6, characterized in that: A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier, or generation of an RS sequence of a DMRS of the wireless signal depends on the identifier.

8. A second node used for wireless communication, characterized in that: include: A second transmitter sends a first message, wherein the first message includes parameters of a target cell; Wherein, as a response to the first message being received, the receiver of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers; or, A third transmitter sends at least one synchronization signal, wherein any synchronization signal of the at least one synchronization signal indicates one of a plurality of identifiers; wherein a first message is received, the first message includes parameters of a target cell, the parameters of the target cell include the multiple identifiers; as a response to the first message being received, a recipient of the first message is synchronized to the target cell; being synchronized to the target cell includes: the at least one synchronization signal is received.

9. The second node according to claim 8, characterized in that: The second node includes the second transmitter and the third transmitter.

10. The second node according to claim 8 or 9, characterized in that: include: A second receiver receives a second message, where the second message is a response to the first message, and the second message indicates completion of the RRC configuration; The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

11. The second node according to claim 10, characterized in that: The at least one synchronization signal includes a plurality of synchronization signals, any two synchronization signals among the plurality of synchronization signals indicate different identifiers, and the downlink timing of the time unit is a reception time of a first detected path of the time unit.

12. The second node according to any one of claims 8 to 11, characterized in that: One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

13. The second node according to any one of claims 8 to 12, characterized in that: include: The second transmitter, or the third transmitter, sends a first wireless signal in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

14. The second node according to claim 13, characterized in that: The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

15. The second node according to any one of claims 8 to 14, characterized in that: A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier, or generation of an RS sequence of a DMRS of the wireless signal depends on the identifier.

16. A method in a first node for wireless communication, characterized in that: include: receiving a first message, wherein the first message includes parameters of a target cell; In response to receiving the first message, synchronizing to the target cell; The parameters of the target cell include multiple identifiers; and the synchronization to the target cell includes: receiving at least one synchronization signal, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers.

17. The method in the first node according to claim 1, characterized in that: include: In response to receiving the first message, sending a second message indicating completion of the RRC configuration; The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

18. The method in the first node according to claim 17, characterized in that: The at least one synchronization signal includes a plurality of synchronization signals, any two synchronization signals among the plurality of synchronization signals indicate different identifiers, and the downlink timing of the time unit is a reception time of a first detected path of the time unit.

19. The method in the first node according to any one of claims 16 to 18, characterized in that: One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

20. The method in the first node according to any one of claims 16 to 19, characterized in that: include: A first wireless signal is received in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

21. The method in the first node according to claim 20, characterized in that: The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

22. The method in the first node according to any one of claims 16 to 21, characterized in that: A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier, or generation of an RS sequence of a DMRS of the wireless signal depends on the identifier.

23. A method in a second node for wireless communication, characterized in that: include: Sending a first message, wherein the first message includes parameters of the target cell; Wherein, as a response to the first message being received, the receiver of the first message is synchronized to the target cell; the parameter of the target cell includes multiple identifiers; the synchronization to the target cell includes: the at least one synchronization signal is received, and any synchronization signal of the at least one synchronization signal indicates one of the multiple identifiers; or, Sending at least one synchronization signal, any synchronization signal of the at least one synchronization signal indicating one of a plurality of identifiers: wherein a first message is received, the first message including parameters of a target cell, the parameters of the target cell including the multiple identifiers; and as a response to the first message being received, a receiver of the first message is synchronized to the target cell; the being synchronized to the target cell includes: the at least one synchronization signal is received.

24. The method in the second node according to claim 23, characterized in that: The first message is sent by the second node, and the at least one synchronization signal is sent by the second node.

25. The method in the second node according to claim 22 or 23, characterized in that: include: receiving a second message, where the second message is a response to the first message, and the second message indicates completion of the RRC configuration; The sending timing of the second message depends on the downlink timing of the time unit occupied by the second message, and the downlink timing of the time unit depends on the reception of the at least one synchronization signal.

26. The method in the second node according to claim 25, characterized in that: The at least one synchronization signal includes a plurality of synchronization signals, any two synchronization signals among the plurality of synchronization signals indicate different identifiers, and the downlink timing of the time unit is a reception time of a first detected path of the time unit.

27. The method in the second node according to any one of claims 23 to 26, characterized in that: One of the at least one synchronization signal is a first synchronization signal, the first synchronization signal includes multiple sub-signals, each of the multiple sub-signals indicates a first identifier, and the first identifier is one of the multiple identifiers; any two of the multiple sub-signals are spatially uncorrelated.

28. The method in the second node according to any one of claims 23 to 27, characterized in that: include: A first wireless signal is sent in the target cell, where the first wireless signal is associated with one of the multiple identifiers.

29. The method in the second node according to claim 28, characterized in that: The parameters of the target cell include the BWP to which the frequency domain resources occupied by the first wireless signal belong.

30. The method in the second node according to any one of claims 23 to 29, characterized in that: A wireless signal is associated with an identifier, including: a scrambling code of the wireless signal depends on the identifier, or generation of an RS sequence of a DMRS of the wireless signal depends on the identifier.

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