Communication method, terminal, and network side device

Abstract

The present application relates to the technical field of communications, and discloses a communication method, a terminal, and a network side device. The communication method in embodiments of the present application comprises: a terminal determines to access a first network; and in the process of the terminal accessing the first network, the terminal determines a first compensation value, and on the basis of the first compensation value, performs timing advance (TA) and / or frequency offset (FO) compensation on a first signal.

Description

Communication method, terminal and network side device

[0001] Cross-reference to related applications

[0002] This application is based on the Chinese patent application No. 202410724908.0, filed on June 5, 2024, and claims the priority of the Chinese patent application No. 202410724908.0, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, in particular to a communication method, a terminal and a network side device. BACKGROUND

[0004] In the future 6G, Non-Terrestrial Network (NTN) and Terrestrial Network (TN) may need unified air interface design, wherein NTN communication has a large Round-Trip Time (RTT) and Doppler, which requires support for a large timing advance (TA) and a large Frequency Offset (FO). In addition, the cell free system in TN may also require support for a large TA due to a large RTT. These large TA and FO need to add an additional pre-compensation amount on the basis of the existing TA and / or FO correction method of TN, otherwise normal communication cannot be carried out. SUMMARY

[0005] The embodiments of the present application provide a communication method, a terminal and a network side device, which can solve the problem of how to compensate for the additional compensation amount on the basis of the existing TA and / or FO correction method of TN to realize normal communication.

[0006] In a first aspect, a communication method is provided, which is executed by a terminal, and the method comprises: determining, by the terminal, to access a first network; determining, by the terminal, a first compensation value during the process that the terminal accesses the first network, and compensating, by the terminal, a first signal according to the first compensation value in terms of timing advance (TA) and / or frequency offset (FO).

[0007] In a second aspect, a communication method is provided, performed by a network-side device, the method comprising: performing, by the network-side device, a first operation, the first operation comprising at least one of: sending, to a terminal, network type related information; obtaining first capability information of the terminal; determining a type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or the network type related information; determining first configuration information according to the type of TA and / or FO compensation, sending, to the terminal, the first configuration information, the first configuration information comprising at least one of: the first compensation value; reference information used for determining the first compensation value; a calculation method used for determining the first compensation value; seventh information used for determining the first compensation value; determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on a first signal according to the second compensation value.

[0008] In a third aspect, a communication apparatus is provided, applied to a terminal, comprising: a first determining unit configured to determine to access a first network; and a compensation unit configured to determine a first compensation value in a process of accessing the first network, and perform timing advance (TA) and / or frequency offset (FO) compensation on a first signal according to the first compensation value.

[0009] In a fourth aspect, a communication apparatus is provided, applied to a network-side device, comprising: a first performing unit configured to perform a first operation, the first operation comprising at least one of: sending, to a terminal, network type related information; obtaining first capability information of the terminal; determining a type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or the network type related information; determining first configuration information according to the type of TA and / or FO compensation, sending, to the terminal, the first configuration information, the first configuration information comprising at least one of: the first compensation value; reference information used for determining the first compensation value; a calculation method used for determining the first compensation value; seventh information used for determining the first compensation value; determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on a first signal according to the second compensation value.

[0010] In a fifth aspect, a communication apparatus is provided, the apparatus being configured to perform the steps of the method of the first aspect, or to implement the steps of the method of the second aspect.

[0011] In a sixth aspect, a terminal is provided, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions being executed by the processor to implement the steps of the method of the first aspect.

[0012] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to determine to access a first network; determine a first compensation value for timing advance (TA) and / or frequency offset (FO) compensation of a first signal during the accessing of the first network.

[0013] In an eighth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0014] In a ninth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the processor is configured to perform a first operation, the first operation comprising at least one of: sending network type related information to a terminal; obtaining first capability information of the terminal; determining a type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or the network type related information; determining first configuration information according to the type of TA and / or FO compensation, and sending the first configuration information to the terminal, the first configuration information comprising at least one of: the first compensation value; reference information for determining the first compensation value; a calculation method for determining the first compensation value; seventh information for determining the first compensation value; determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation of a first signal according to the second compensation value.

[0015] In a tenth aspect, a readable storage medium is provided, the readable storage medium storing programs or instructions, the programs or instructions, when executed by a processor, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the second aspect.

[0016] In an eleventh aspect, a wireless communication system is provided, comprising a terminal and a network-side device, wherein the terminal is configured to implement the steps of the method according to the first aspect, and the network-side device is configured to implement the steps of the method according to the second aspect.

[0017] In a twelfth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the method according to the first aspect, or implement the method according to the second aspect.

[0018] In a thirteenth aspect, a computer program or program product is provided, which is stored in a storage medium, and is executed by at least one processor to implement the steps of the communication method according to the first aspect, or to implement the steps of the communication method according to the second aspect.

[0019] In the embodiments of the present application, the terminal determines to access the first network, and determines the first compensation value in the process of accessing the first network. The first signal is compensated for timing advance (TA) and / or frequency offset (FO) according to the first compensation value, so that additional compensation for TA and / or FO can be implemented, and the communication quality and efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] FIG. 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0021] FIG. 2 is a flowchart of a communication method according to an embodiment of the present application;

[0022] FIG. 3 is a flowchart of a communication method according to another embodiment of the present application;

[0023] FIG. 4 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application;

[0024] FIG. 5 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application;

[0025] FIG. 6 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application;

[0026] FIG. 7 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application;

[0027] FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0028] FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0029] FIG. 10 is a schematic structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0031] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0033] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0034] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit or receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0035] The core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0036] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices jointly, and the embodiments of the present application do not make a specific limitation in this regard. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a dedicated hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0037] Firstly, the related technologies involved in the embodiments of the present application are described.

[0038] (1) Timing advance TA

[0039] In order to ensure the orthogonality of uplink transmission and avoid intra-cell interference, the base station requires that the signals from different UEs in the same frame arrive at the base station at substantially the same time. As long as the base station receives the uplink data sent by the UE within the cyclic prefix (CP) range, it can correctly decode the uplink data, so the uplink synchronization requires that the signals from different UEs in the same subframe arrive at the base station within the CP.

[0040] Therefore, timing advance (TA) is introduced for terminal uplink transmission, the purpose of which is to ensure that the signals of terminal uplink transmission arrive at the base station within the desired time, thereby ensuring the uplink alignment of multiple users. The specific implementation can be simply summarized as follows: the base station measures the radio frequency transmission time delay caused by the distance to estimate the TA value, and sends a timing advance command (TAC) to the terminal to inform the terminal to send the corresponding amount of time in advance.

[0041] The base station determines the TA value of each UE by measuring the uplink transmission of the UE. Therefore, as long as the UE has uplink transmission, the base station can be used to estimate the TA value. In theory, any signal (SRS / DMRS / CQI / ACK / NACK / PUSCH, etc.) sent by the UE can be used to measure the TA. In the random access process, the base station determines the TA value by measuring the received preamble.

[0042] From the perspective of the UE, the TA is a negative offset between the start time of receiving a downlink frame and the time of transmitting an uplink frame. By properly controlling the offset of each UE, the base station can control the time when the uplink signals from different UEs arrive at the base station. For UEs far away from the base station, due to the larger transmission delay, the uplink data needs to be sent in advance compared with UEs close to the base station. Without TA adjustment, the uplink signals of different UEs do not arrive at the base station at the same time, while after TA adjustment, the uplink signals of different UEs arrive at the base station at the same time.

[0043] In addition, for the carrier aggregation (CA) scenario, the time advance group (TAG) is introduced. Due to the time delay caused by multiple carriers, or the large difference in geographical location of Pcell and Scell of different carriers, a unified TA cannot be used for processing. Therefore, the concept of TAG is introduced, and the TA corresponding to the same TAG is the same, and the TA values corresponding to different TAGs are different.

[0044] (ii) UE acquires and compensates for TA or FO

[0045] In the existing NR mechanism, the measurement of TA is completed by the network side, and the UE is informed of the value of TA through two ways, and compensates for it by itself: random access and MAC CE.

[0046] 1) Random access: In 5G NR, in the initial access stage, the user equipment (UE) needs to obtain the frequency point of the access carrier by searching for the synchronization block (SS / PBCH Block, SSB) to achieve downlink synchronization. Because the frequency spectrum range of new radio (NR) is very wide, in order to reduce the complexity of search, the UE searches for SSB according to a certain frequency interval specified by the protocol, which is called synchronization raster. The UE detects the received power SS-RSRP of the synchronization signal on the corresponding frequency point according to the synchronization raster, and selects any SSB whose SS-RSRP is higher than the threshold value rsrp-ThresholdSSB. By demodulating the primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBCH) signals in the selected SSB, cell selection and synchronization with the base station are completed, and then random access is performed.

[0047] At present, random access can be divided into a process of contention-based or non-contention-based random access. According to the flow, the random access process can be divided into a 4-step random access process (also called Type-1 random access process) and a 2-step random access process (also called Type-2 random access process).

[0048] In NR Rel-15, the contention-based 4-step random access procedure (Random Access Channel, RACH) is as follows. The UE first sends Msg1, i.e. a random access preamble, to the network; after the network detects the preamble, it will send Msg2, i.e. a random access response (Random Access Response, RAR) message, containing the preamble number detected by the network, i.e. RAPID (RACH preamble ID), uplink PUSCH resources (UL grant information) allocated to the UE to send Msg3, temporary cell radio network temporary identifier (TC-RNTI), TA command, etc.; after the UE receives Msg2, if it confirms that at least one of the preamble numbers carried in Msg2 is consistent with the preamble number it sent, it will send Msg3 containing contention resolution information according to the uplink resources indicated in the RAR; if the network does not receive Msg3 PUSCH, it can schedule the retransmission of Msg3 PUSCH in the PDCCH scrambled by TC-RNTI. After the network receives Msg3, it will send Msg4 containing contention resolution information; after the UE receives Msg4, it confirms that the resolution information is consistent with the information it sent in Msg3, i.e. the 4-step random access is completed.

[0049] In NR Rel-16, the 2-step random access procedure (2-step RACH) is introduced. The UE first sends MsgA to the network side. After the network side receives MsgA, it sends MsgB message to the UE, which also contains the TA command to the UE.

[0050] In random access, the network side determines the TA value by measuring the received preamble and sends it to the UE through the Timing Advance Command in the RAR. In the MAC Payload of the RAR, the Timing Advance Command (TAC) is included, which is 12 bits in total, indicating a range of: T A = 0, 1, 2,..., 3846, assuming a subcarrier spacing of 2 μ * 15 kHz, N TA is determined by the following formula: N TA = T A · 16 · 64 / 2 μ That is, in NR, N TAThere is also a subcarrier spacing involved, which depends on the subcarrier spacing of the first uplink transmission after receiving the RAR, i.e. Msg3.

[0051] 2) TA maintenance after completing random access: In random access, the UE has completed timing advance, but the UE's location, etc. may change over time, so the base station needs to constantly maintain the timing advance, which is also carried by the MAC CE to the UE TAC. The indication range of TAC is T A = 0, 1, 2,..., 63, N TA Determined by the following formula: N TA_new = N TA_old +(T A -31)·16·64 / 2 μ , where N TA_old is the N TA used before receiving TAC, N TA_new is the updated N TA after receiving TAC.

[0052] In a general wireless communication system, the frequency of the UE's uplink transmission signal arriving at the network side may be offset due to the UE's own crystal oscillator offset, mobility, etc., i.e. FO. In the existing FO compensation mechanism of NR terrestrial network, the network side is fixed, and the UE can estimate the frequency offset value by receiving downlink reference signals such as SSB, CSI-RS, etc., and then compensate the FO of the received signal and the transmitted signal, so that the UE can correctly demodulate the signal transmitted by the network side, and the frequency of the UE's transmitted signal arriving at the network side is also on the correct frequency.

[0053] (Three) TA / Doppler shift pre-compensation in NTN

[0054] In the scenario of non-terrestrial network (NTN), the distance between satellite and UE is very far, and the RTT is very large, so it is necessary to define a different TA compensation method from TN. In R17 NTN, a TA compensation method is standardized for transparent forwarding NTN scenarios. Specifically, the whole time from gNB (or gateway) UE includes three segments of time from gNB to reference point (RP), RP to satellite, and satellite to UE. Among them, the TA from gNB to RP is implemented by gNB itself to ensure that the uplink and downlink at RP are synchronized, while the TA from RP to satellite is denoted as N TA,common , which is applicable to UEs connected to the same satellite; the TA from satellite to UE is denoted as N TA,UE-specific +N TA , where N TA,UE-specificThe position relationship between the UE and the satellite is related to the position of the UE and the satellite, and the motion trajectory of the satellite (such as ephemeris). If the position of the UE and the satellite, and the motion trajectory of the satellite are known (such as ephemeris), can be obtained as a constant, N TA Then, the and compensation are obtained by the method in (ii) above.

[0055] From the above description, the TA compensation of the NTN includes the compensation of the gNB (compensating the TA from the gNB to the RP) and the pre-compensation of the UE (N TA,UE-specific +N TA ). The total TA that needs to be compensated by the UE is determined by the following formula:

[0056] T TA =(N TA,UE-specific +N TA,common +N TA +N TA,offset )*T c

[0057] Wherein, N TA and N TA,offset are legacy behaviors, and T c is a preset value.

[0058] The parameters (time-varying constants, first-order variations, and second-order variations) for calculating N TA,common or the ephemeris information of the satellite need to be indicated by the gNB. For example, the gNB can indicate {TACommon, TACommonDrift, TACommonDriftVariation}, and then the UE can determine N TA,common according to the following formula:

[0059] N TA,common =TACommon(t epoch )+TACommonDrift*(t-t epoch )+TACommonDriftVariation*(t-t epoch ) 2

[0060] Wherein, t epoch is a reference time, and t is an actual time.

[0061] In addition to TA, since the satellite also moves at high speed, it will also cause Doppler shift and frequency offset. In related technologies, the frequency shift from the gNB to the satellite (feeder link) is compensated by the gNB itself, and the frequency shift from the satellite to the UE needs to be calculated and compensated by the UE itself according to its own position (such as GNSS feedback coordinates) and ephemeris information of the satellite.

[0062] (iv) Cell-free systems

[0063] A cell-free massive MIMO system can be considered as a deconstruction of the traditional massive MIMO system. In the traditional massive MIMO system, the antenna set is centralized in one site (base station), and the UEs are distributed in the form of cells around the base station. In the massive MIMO system, a large number of antennas are deployed in each base station. Therefore, a higher array gain and spatial resolution are provided. Multiple UEs can be served simultaneously on the same time-frequency resource, providing high throughput, high reliability, and high energy efficiency. The cell-free massive MIMO system breaks the concept of cells, and a large number of antennas are distributed in a wide area, and the UEs are also distributed in this wide area. These antennas are called transmit-receive points (TRPs) or access points (APs), and theoretically each UE can communicate with each AP. With the help of a front-haul network and a central processing unit (CPU), a large number of geographically dispersed TRPs can collectively serve a smaller number of UEs, and the CPU uses channel statistical information for joint detection. The cell-free massive MIMO network is expected to be applied to the next generation of indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping centers, stadiums, subways, hospitals, community centers, or university campuses, etc.

[0064] In actual implementation, the cell-free network in the hotspot area can be regarded as a super cell containing multiple TRPs, wherein the multiple TRPs use the same cell ID, and according to the synchronization accuracy and connection relationship between the TRPs, multiple TRPs with high synchronization accuracy can implement cooperative transmission.

[0065] In the future 6G, the coverage of the cell-free system can be very large. At this time, if the macro TRP wants to cover more small TRPs, its coverage also needs to be very large. However, this can cause the coverage of the macro TRP to exceed the uplink timing estimation capability supported by the preamble, that is, due to the limitation of the design of the preamble, it cannot support the macro base station with a very large coverage. Therefore, in the cell-free scenario, the terminal can also need to pre-compensate the TA.

[0066] In the future 6G, NTN and TN can need a unified air interface design, wherein NTN communication can bring a larger TA and FO, and the cell free system in TN can also bring a larger TA, and these larger TA and FO need to add an additional pre-compensation amount on the basis of the existing TA and / or FO correction method, otherwise normal communication cannot be carried out. In the existing mechanism, these additional pre-compensation amounts require the UE to dynamically track and calculate the current pre-compensation amount according to the geographical position information of the UE and the geographical position information of the target cell / TRP. However, in the design of the unified air interface, it is unnecessary to require all UEs to support the above-mentioned pre-compensation mechanism, and there is currently no related mechanism for negotiating the UE and the network about the pre-compensation / post-compensation related capability interaction and parameter determination mechanism.

[0067] The communication method, the terminal and the network side device provided by the embodiments of the present application will be described in detail in combination with the accompanying drawings, some embodiments and application scenarios.

[0068] FIG. 2 is a flowchart of a communication method provided by an embodiment of the present application. As shown in FIG. 2, the communication method comprises steps 210 and 220.

[0069] Step 210: The terminal determines to access a first network.

[0070] Step 220: In the process of the terminal accessing the first network, the terminal determines a first compensation value, and compensates a first signal for timing advance (TA) and / or frequency offset (FO) according to the first compensation value.

[0071] It can be understood that the first compensation value includes a timing advance (TA) compensation value and / or a frequency offset (FO) compensation value.

[0072] The TA described in the embodiments of the present application can also represent the time offset amount, the time advance amount, the offset amount of the time advance amount, etc. of a certain link (such as uplink) relative to another link (such as downlink).

[0073] The frequency offset FO described in the embodiments of the present application can also represent one or more of the frequency error, the offset of the frequency error, the Doppler shift, and the change rate of the frequency offset.

[0074] Optionally, the type of the first network in the embodiments of the present application includes a TN network, an NTN network, and a cell free network.

[0075] Optionally, the first network includes a first network side device, a first transceiver unit, a first access point, etc.

[0076] The UE or terminal described in the embodiments of the present application can also refer to a certain transceiver unit, and the network or network transceiver unit can correspond to another transceiver unit.

[0077] Optionally, the first signal can be an uplink signal or a downlink signal. The uplink described in the embodiments of the present application can also refer to a certain link direction, and the downlink can also correspond to another link direction.

[0078] In the embodiments of the present application, compensation includes pre-compensation and post-compensation. The terminal performs timing advance TA and / or frequency offset FO compensation on the first signal, including pre-compensation or post-compensation of timing advance TA and / or frequency offset FO on the first signal.

[0079] It should be noted that the pre-compensation in the embodiments of the present application includes two cases:

[0080] (1) Based on the existing TA and / or FO acquisition and compensation mechanism, consider the TA and / or FO related to the position / speed / trajectory of UE / gNB / TRP that need to be additionally compensated in NTN or Cell free scenarios, such as the existing mechanism of NTN, N TA +N TA,offset corresponds to the TA compensation mechanism of the legacy, and N TA,UE-specific +N TA,common corresponds to the TA that needs to be additionally compensated.

[0081] The existing TA and / or FO acquisition and compensation mechanism refers to: only relying on the calculation and compensation of TA and / or FO by sending or measuring reference signals, without changing the value range or indication granularity or accuracy of the TA and / or FO of the existing mechanism.

[0082] (2) Modify the acquisition and compensation mechanism of the Legacy TA and / or FO, such as modifying the value range or indication granularity or accuracy, or modifying the calculation method to achieve similar effects as (1).

[0083] In addition, pre-compensation and post-compensation are relative. For one link (such as uplink), if the UE does not pre-compensate or the pre-compensation is not sufficient, the network needs to receive the signal of the UE through post-compensation; on the contrary, for another link (such as downlink), if the network does not pre-compensate, the UE needs to receive the signal sent by the network side through post-compensation. The following embodiments are written based on the UE pre-compensation of the uplink and the post-compensation of the network, but can be easily extended to the downlink case, which is UE post-compensation and network pre-compensation, all of which are within the protection scope of the present application.

[0084] In the embodiments of the present application, the TA and / or FO compensation includes: only TA compensation, only FO compensation, or TA and FO compensation. That is, the case of only focusing on TA compensation, only focusing on FO compensation, or both can be covered.

[0085] The communication method provided by the embodiments of the present application can realize additional compensation for TA and / or FO, and improve the communication quality and efficiency.

[0086] In some embodiments, the determining the first compensation value includes:

[0087] According to the first capability information of the terminal, or according to the first capability information of the terminal and the network type related information of the first network, the compensation type of TA and / or FO is determined.

[0088] According to the compensation type of TA and / or FO, the first compensation value is determined.

[0089] In the embodiments of the present application, the terminal determines the compensation type of TA and / or FO according to the first capability information, or the terminal determines the compensation type of TA and / or FO according to the first capability information and the network type related information. Further, the first compensation value is determined according to the compensation type of TA and / or FO. The terminal and the network perform capability interaction related to pre-compensation / post-compensation, which can realize effective compensation for TA and / or FO, and improve the communication quality and efficiency.

[0090] Optionally, the terminal determines the compensation type of TA and / or FO according to the first capability information. The first capability information is used to indicate that the terminal supports the type of compensating TA and / or FO. Optionally, the first capability information is also used to indicate the granularity of compensating TA and / or FO.

[0091] In some embodiments, the first capability information includes at least one of the following:

[0092] 1) The compensation type or capability of the terminal, including one of the following: only compensating the first TA and / or the first FO; compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating the first TA and / or the first FO, and calculating other TA and / or FO compensation values other than the first TA and / or the first FO according to one or more reference information;

[0093] 2) Whether to support compensating other TA other than the first TA and the TA compensation granularity;

[0094] 3) Whether to support compensating other FO other than the first FO and the FO compensation granularity;

[0095] 4) whether network compensates TA and / or FO, including at least one of: network compensates other TA and / or FO compensation values except for the first TA and / or the first FO, network compensates other TA and / or FO compensation values except for the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal, network does not compensate TA and / or FO;

[0096] 5) the network compensation type or operation expected or preferred by the terminal;

[0097] wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0098] In the embodiments of the present application, three types of terminal compensation or capabilities are defined as follows:

[0099] Type A: the terminal compensates only the first TA and / or the first FO, i.e. the terminal does not support compensating other TA and / or FO except for the first TA and / or the first FO. For Type A, the terminal compensates only the first TA and / or the first FO.

[0100] wherein the first TA and / or the first FO refer to the first TA and / or the first FO calculated along the TA and / or FO compensation mechanism of the 5G TN, i.e. the aforementioned legacy TA and / or FO, and the first TA includes N TA and N TA,offset , and the specific calculation method can refer to the content in the aforementioned (second) part of the related art description.

[0101] The acquisition and compensation mechanism of the Legacy TA and / or FO refers to calculating and compensating TA and / or FO only by sending or measuring reference signals, which does not change the value range / indication granularity / accuracy of the TA and / or FO of the existing mechanism.

[0102] At this time, the UE follows the TA and / or FO compensation mechanism of the 5G TN, for example, for the determination of TA, the PRACH transmission uses TA as 0, and if the additional larger TA and / or FO brought by the NTN / Cell free scenario needs to be compensated by the network side after the TA and / or FO of the uplink transmission signal.

[0103] The first FO includes FO estimated and compensated only according to reference signals.

[0104] It should be noted that the first FO includes FO estimated and compensated only according to reference signals by the terminal and the network side device.

[0105] Type B: the terminal supports compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value.

[0106] For example, the UE can determine and pre-compensate the TA and / or FO fixed compensation value according to the indication of the network side or based on GNSS coordinates and other information.

[0107] Optionally, before determining the TA and / or FO fixed compensation value, a set of limited TA and / or FO fixed compensation values is determined.

[0108] Type C: the terminal supports compensating according to other TA and / or FO compensation values calculated based on one or more reference information in addition to the first TA and / or the first FO. For Type C, both the first TA and / or the first FO and other TA and / or FO compensation values are supported.

[0109] The terminal supports calculating the TA and / or FO compensation value based on one or more reference information and a method / function / formula for calculating the TA and / or FO compensation value. At this time, the terminal usually dynamically compensates.

[0110] It should be noted that Type B can be further expanded and further refined, such as differences in the supportable value range of TA and / or FO, the size of the set of fixed values, etc.

[0111] The compensation type or capability Type A~Type C of the terminal can form various combinations with TA and FO, such as only supporting TA compensation, only supporting FO compensation, or both supporting compensation, etc.

[0112] In addition, optionally, the three types of capabilities of the terminal have a containing relationship, such as for the UE, Type C contains the capabilities of Type A and B, and Type B contains the capability of Type A.

[0113] Optionally, the first capability information includes whether to support compensating other TA in addition to the first TA and the TA compensation granularity, for example, when the TA compensation granularity is partially supported, the value range of the pre-compensation TA fixed compensation value also needs to be explicitly supported.

[0114] Optionally, the first capability information includes whether to support compensating other FO in addition to the first FO and the FO compensation granularity, for example, when the FO compensation granularity is partially supported, the value range of the pre-compensation FO fixed compensation value also needs to be explicitly supported.

[0115] Optionally, the first capability information can also include information about whether the network side needs to compensate for the TA and / or FO, and the information about whether the network side needs to compensate for the TA and / or FO includes one of the following: 1) full compensation by the network side, i.e., the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO; 2) partial compensation by the network side, i.e., the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO and a fixed TA and / or FO compensation value compensated by the terminal; and 3) no compensation for TA and / or FO by the network.

[0116] Optionally, the first capability information includes a network compensation type or operation expected or preferred by the terminal, and the network compensation type or operation expected or preferred by the terminal includes one of the following: 1) full compensation by the network side, i.e., the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO; 2) partial compensation by the network side, i.e., the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO and a fixed TA and / or FO compensation value compensated by the terminal; and 3) no compensation for TA and / or FO by the network.

[0117] Optionally, the first compensation value includes one of the following: 0, a preset or configured TA and / or FO fixed compensation value, or a TA and / or FO compensation value other than the first TA and / or the first FO calculated according to one or more reference information.

[0118] In some embodiments, the first capability information is determined according to at least one of the following:

[0119] 1) first information, the first information including at least one of the following: height of the terminal, hardware type of the terminal, speed of the terminal, position information of the terminal, power level of the terminal, and crystal oscillator level of the terminal;

[0120] The height of the terminal can be ground, floor, low altitude, or high altitude, and different height ranges can be defined for differentiation.

[0121] The hardware type of the terminal includes a reduced capability (redCap) terminal, a customer premises equipment (CPE), a mobile phone, a tag terminal, a narrow band Internet of Things (NB-IoT) terminal, and the like.

[0122] The position information of the terminal can define different cell diameter ranges for differentiation.

[0123] 2) a signal feature associated with or determined by the first information;

[0124] Optionally, the signal feature associated with or determined by the first information comprises:

[0125] a time domain feature of the signal transmitted or received by the terminal, such as time delay, and its variation or range;

[0126] a Doppler information of the signal transmitted or received by the terminal, such as Doppler shift, and its variation or range;

[0127] a phase of the signal transmitted or received by the terminal, and its variation or range;

[0128] a path loss of the signal transmitted or received by the terminal, and its variation or range.

[0129] 3) frequency information;

[0130] The frequency information comprises at least one of:

[0131] whether a specific band is supported;

[0132] whether a contiguous band is supported;

[0133] whether a non-contiguous band is supported;

[0134] a maximum or minimum operating bandwidth supported, or a maximum or minimum signal bandwidth supported.

[0135] 4) whether it is a multi-carrier service scenario and / or whether it supports multi-carrier service;

[0136] Optionally, it is a CA scenario or a non-CA scenario.

[0137] 5) whether it is a terrestrial communication (TN) or a non-terrestrial communication (NTN);

[0138] 6) a transmission mode of the terminal;

[0139] For example, a low-power transmission mode, a high-power transmission mode.

[0140] 7) whether multi-TRP transmission is supported;

[0141] 8) a type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type of the signal supported;

[0142] 9) whether it is a backscatter communication;

[0143] 10) whether dual connectivity and / or a combination of dual connectivity is supported;

[0144] Optionally, supporting dual connectivity corresponds to one capability, and not supporting dual connectivity corresponds to another capability.

[0145] Different dual connectivity combinations correspond to different capabilities.

[0146] 11) whether frequency division duplex, sub-band full duplex or simultaneous full duplex in the same frequency is supported;

[0147] 12) supported power levels;

[0148] 13) whether broadcast and / or multicast is supported;

[0149] 14) whether SFN is supported;

[0150] 15) whether Multiple-Input Multiple-Output (MIMO) transmission is supported;

[0151] 16) maximum number of layers of MIMO transmission supported;

[0152] 17) whether Hybrid automatic repeat request (HARQ) transmission or disable HARQ feedback is supported;

[0153] 18) whether Carrier Aggregation (CA) or Semi-Persistent Scheduling (SPS) transmission is supported;

[0154] 19) type of CA or SPS transmission supported;

[0155] 20) supported measurement gap;

[0156] 21) whether lower layer triggered mobility (LTM) and / or conditional handover is supported.

[0157] It can be understood that the above-mentioned capabilities can be mapped to different terminal compensation types. For example, whether a certain capability is supported or not, or whether a combination of supported or unsupported capabilities, can be associated with determining the compensation type of the terminal.

[0158] In some embodiments, the method further comprises:

[0159] reporting, by the terminal, the first capability information to the first network;

[0160] The reporting manner of the first capability information comprises one of the following:

[0161] 1) using at least one signal or parameter of the signal associated with the first capability information;

[0162] 2) using the resources of the signal associated with the first capability information, different capability types corresponding to different resources of the same signal;

[0163] For example, the associated signal is a physical random-access channel (PRACH), and different UE compensation types or TA and / or FO pre-compensation capabilities correspond to different PRACH resources.

[0164] 3) reported through high-layer signaling;

[0165] Optionally, the high-layer signaling is radio resource control (RRC) signaling. For example, the RRC signaling is reported through an RRC message in or after an RRC setup process, such as an RRC Connection Request or an RRC Setup Complete.

[0166] The first capability information can be explicitly or implicitly reported through the high-layer signaling.

[0167] 4) reported through MAC layer signaling;

[0168] Optionally, the MAC layer signaling is reported through a media access control control element (MAC CE), for example, by associating different UE compensation types or capabilities with a special LCID or by reporting through a reserved field or a padding field of the MAC CE.

[0169] 5) reported through physical layer signaling.

[0170] For example, the physical layer signaling is reported through uplink control information (UCI) information.

[0171] In the embodiments of the present application, the terminal determines the compensation type of TA and / or FO according to the first capability information, and further determines the first compensation value according to the compensation type of TA and / or FO, so that the terminal performs TA and / or FO compensation according to the first compensation value, thereby improving the communication efficiency.

[0172] In some embodiments, the terminal determines the compensation type of TA and / or FO according to the first capability information of the terminal and network type related information of the first network.

[0173] The network type related information of the first network is used to indicate the type of TA and / or FO compensation supported by the network, and optionally, is also used to indicate the granularity of the TA and / or FO compensation supported.

[0174] In some embodiments, the network type related information comprises one of the following:

[0175] a network compensation type, comprising one of the following: compensating for TA and / or FO compensation values other than the first TA and / or the first FO; compensating for TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal; not compensating for TA and / or FO; a supported compensation granularity; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises FO estimated and compensated only according to reference signals;

[0176] a service or a service type or a quality of service (QoS) or a QoS flow identifier (QFI) or a QoS class identity (QCI) associated with the network compensation type;

[0177] whether to support TA compensation other than the first TA and a TA compensation granularity;

[0178] whether to support FO compensation other than the first FO and a FO compensation granularity;

[0179] a desired or preferred compensation type;

[0180] a desired or required compensation capability or type of the terminal and a compensation granularity;

[0181] a service or a service type or a QoS or a QFI or a QCI associated with the compensation capability or type of the terminal and the compensation granularity;

[0182] one or more preset field values, used to indicate whether the terminal is required to support TA and / or FO compensation and a compensation granularity, or used to indicate a compensation capability or type and a compensation granularity required to be possessed by the terminal.

[0183] In the embodiments of the present application, three network compensation types are defined corresponding to the compensation type or capability of the terminal, as follows:

[0184] Type 1: the network side supports compensating for TA and / or FO compensation values other than the first TA and / or the first FO;

[0185] Type 2: the network side supports compensating for TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal;

[0186] Type 3: the network side does not compensate for TA and / or FO.

[0187] The first TA and / or the first FO are legacy TA and / or FO, which can be described in the foregoing embodiments and will not be described here again.

[0188] It should be noted that Type 2 can be further expanded and refined, for example, the TA and / or FO support value range is different, the TA and / or FO fixed compensation value set size, and the like.

[0189] The network compensation types Type 1-3 can be combined with TA and FO in various ways, for example, only supporting TA compensation, only supporting FO compensation, or both supporting compensation, and the like.

[0190] In addition, the above three compensation types of the network can have a containing relationship, for example, Type 1 contains the capabilities of Type 2 and Type 3, and Type 2 contains the capabilities of Type 3.

[0191] Optionally, the network type related information includes services or services or quality of service QoS or quality of service flow identifier QFI or quality of service classification identifier QCI associated with the network compensation type.

[0192] Optionally, the network type related information includes whether to support TA compensation other than the first TA and the TA compensation granularity.

[0193] Optionally, the network type related information includes whether to support FO compensation other than the first FO and the FO compensation granularity.

[0194] Optionally, the network type related information includes the network side expected or preferred compensation type or operation.

[0195] The above information is described from the network side, and the network side can also equivalently indicate the expected or required terminal compensation capability or type and compensation granularity.

[0196] Optionally, the network type related information includes one of the following:

[0197] The expected or required terminal compensation capability or type and compensation granularity;

[0198] The services or services or quality of service or QFI or QCI associated with the terminal compensation capability or type and compensation granularity;

[0199] 1 or more preset domain values, used to indicate whether the terminal is required to support TA and / or FO compensation and compensation granularity, or used to indicate the terminal needs to have compensation capability or type and compensation granularity.

[0200] For example, one fixed field is set to indicate whether UE is required to support TA and / or FO pre-compensation and its granularity, such as indicating TA offset to UE, if TA offset is 0, UE does not pre-compensate, if offset is X, it means UE is required to pre-compensate by X, X is a fixed value.

[0201] For example, two or more fields are set to indicate whether UE is required to support TA and / or FO pre-compensation and its granularity.

[0202] In some embodiments, the network type related information is determined according to at least one of:

[0203] Second information, the second information includes at least one of: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0204] And the signal characteristics associated with or determined by the second information.

[0205] Optionally, the network height includes low orbit, medium orbit or high orbit. Different orbit height ranges can be defined to distinguish different network compensation types.

[0206] Optionally, the network coverage size includes: cell free size area, or normal cell. Different cell diameter ranges can be defined to distinguish different network compensation types.

[0207] Optionally, and the signal characteristics associated with or determined by the second information, including:

[0208] The time domain characteristics (such as time delay) of the network transmitted or received signal and its variation or range;

[0209] The Doppler information (such as Doppler shift) of the network transmitted or received signal and its variation or range;

[0210] The phase of the network transmitted or received signal and its variation or range;

[0211] The path loss of the network transmitted or received signal and its variation or range.

[0212] In some embodiments, the method further comprises:

[0213] Obtaining the network type related information;

[0214] The obtaining of the network type related information includes one of:

[0215] receiving the network type related information, or the network compensation type and the corresponding compensation granularity, explicitly indicated by the system or broadcast message or groupcast or dedicated signaling;

[0216] receiving the compensation type or capability required by the terminal, or the compensation type or capability required by the terminal and the corresponding compensation granularity, indicated by the system or broadcast message or groupcast or dedicated signaling;

[0217] receiving one or more signals, resource or information corresponding to the one or more signals being associated with the network type related information of the first network, or the network compensation type and the corresponding compensation granularity;

[0218] obtaining information for determining the network type related information, and determining the network type related information of the first network, or the network compensation type and the corresponding compensation granularity, according to the information for determining the network type related information.

[0219] receiving the second information and one or more signals, and determining the network type related information of the first network according to the second information and the one or more signals, resource or information corresponding to the one or more signals being associated with the second information and the network type related information, or the second information and the network type related information and the corresponding compensation granularity.

[0220] It can be understood that the terminal obtains the network type related information or the network compensation type and the corresponding compensation granularity indicated by the network side device.

[0221] Optionally, the network side device explicitly indicates the network type related information or the network compensation type and the corresponding compensation granularity through the system or broadcast message or groupcast or dedicated signaling.

[0222] Optionally, the network side device implicitly indicates the compensation type or capability required by the terminal or the compensation type or capability required by the terminal and the corresponding compensation granularity through the system or broadcast message or groupcast or dedicated signaling.

[0223] For example, the TA pre-compensation value applied by the terminal or the parameter or formula for determining the pre-compensation value is indicated through the MIB or SIB field.

[0224] If the value of the pre-compensation required by the UE is 0, it means that the network side type is Type 1;

[0225] If the value of the pre-compensation required by the UE is a determined value or a group of determined values, it means that the network side type is Type 2;

[0226] If the value of the pre-compensation needed by the UE is a value that varies over time or motion trajectory or location, it means that the network side type is Type 3.

[0227] Optionally, the network side device indicates the network type related information, or the network compensation type and the corresponding compensation granularity, by sending one or more signals, wherein the corresponding resource or information of the one or more signals is associated with the network type related information of the first network, or the network compensation type and the corresponding compensation granularity. Correspondingly, the terminal receives the one or more signals, and can determine the network type related information of the first network, or the network compensation type and the corresponding compensation granularity.

[0228] For example, the signal is RACH, or other resources.

[0229] Optionally, the RACH configurations under type 1 / 2 / 3 are different, for example, the IE (Information Element) names of the RACH configurations are different, or the RACH preamble / RO, or the PRACH format, or the interval between the SSB and the RO, the starting mapping interval (or the interval with the RAR, etc.) are designed differently, and by associating the network side capability with the specific RACH configuration, the UE can know the network type or preference.

[0230] For example, the pattern, density, period, etc. of the broadcast SSB correspond to different network types or preferences.

[0231] Optionally, the network side device implicitly indicates the information for determining the network type related information through system or broadcast message or groupcast or dedicated signaling, and the terminal determines the network type related information of the first network, or the network compensation type and the corresponding compensation granularity according to the information for determining the network type related information.

[0232] For example, the network side device broadcasts the pattern, density, period, etc. of the SSB corresponding to different network heights, and then the terminal determines the network type related information or the network compensation type and the corresponding compensation granularity corresponding to the height.

[0233] In some embodiments, the indication / validity granularity corresponding to the network compensation type or the network type related information includes one of the following:

[0234] one synchronization signal block or synchronization signal block group (Per SSB or SSB group);

[0235] one cell or cell group (Per Cell or Cell group);

[0236] one transmission reception point or transmission reception point group (Per TRP or TRP group);

[0237] one satellite or satellite group (Per Satellite or Satellite group);

[0238] one beam or beam group (Per Beam or Beam group);

[0239] one timing advance group (Per TAG);

[0240] one tracking area or tracking area group (Per Tracking area or Tracking area group);

[0241] one radio access network notification area (RNA) or RNA group (Per RNA or its group);

[0242] The effective granularity refers to the range in which the network type or related parameters are applied or associated.

[0243] In the embodiments of the present application, the terminal determines the compensation type of TA and / or FO according to the first capability information and the network type related information of the first network, and further determines the first compensation value according to the compensation type of TA and / or FO, so that the terminal determines the first compensation value in the case of determining its own compensation type or capability and the network compensation type, and performs TA and / or FO compensation according to the first compensation value, which reduces the TA and / or FO in the communication process and improves the communication quality.

[0244] In some other embodiments, the determination of the first compensation value comprises:

[0245] determining the compensation type of TA and / or FO;

[0246] determining the first compensation value according to the compensation type of TA and / or FO.

[0247] It can be understood that the terminal determines the compensation type of TA and / or FO according to the third information, or according to the first mapping relationship and the first preset value, and then determines the first compensation value according to the compensation type of TA and / or FO.

[0248] Optionally, the terminal determines the compensation type of TA and / or FO according to the third information.

[0249] Optionally, the third information comprises at least one of the following:

[0250] 1) network type related information;

[0251] Reference can be made to the description in the foregoing embodiments, which will not be repeated here.

[0252] 2) the compensation granularity corresponding to the network type related information;

[0253] 3) the compensation type or capability of the terminal;

[0254] Optionally, the compensation type or capability of the terminal comprises one of the following: only compensating the first TA and / or the first FO; compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating the first TA and / or the first FO, and compensating according to a TA and / or FO compensation value calculated based on one or more reference information other than the first TA and / or the first FO;

[0255] 4) the compensation granularity corresponding to the compensation type or capability of the terminal;

[0256] For example, the network side directly indicates the network compensation type to the UE, and / or the type of pre-compensation required or allowed by the UE, and / or at least one of the TAG, SSB, Cell, Cell group, TRP, TRP group, Satellite, Satellite group, beam, beam group, etc. in which it takes effect.

[0257] Case 1, serving cell, TRP, Satellite, RAT: indicating the pre / post compensation type for subsequent uplink / downlink transmission through RAR, Msg4, MsgB, etc.

[0258] It should be noted that the cell mentioned below can also be a TRP, Satellite or RAT, and hereinafter, cell represents cell, TRP, Satellite or RAT, which will not be repeated.

[0259] Case 2: indicating the pre / post compensation type for uplink / downlink transmission of the target cell through the neighbor cell.

[0260] 5) the timing advance group (TAG) or synchronization signal block (SSB) or cell (Cell) or cell group (Cell group) or transmission and reception point (TRP) or transmission and reception point group (TRP group) or satellite (Satellite) or satellite group (Satellite group) or beam (beam) or beam group (beam group) accessed or used by the terminal, and whether it has changed;

[0261] 6) Cell or transmission reception point type indicated in system message or broadcast message;

[0262] For example, the cell or transmission reception point type is Cell free, NTN or Normal TN.

[0263] 7) Relative position or distance between the terminal and the ground network;

[0264] Optionally, the relative position or distance between the terminal and the ground network includes the relative position or distance between the UE and the TRP / gNB.

[0265] For example, for Cell free, if the UE is close to the TRP, Type A access can be used.

[0266] The relative position or distance between the terminal and the ground network includes:

[0267] The measurement value of the target reference signal, for example: the measurement value of the reference signal is greater than a certain threshold, which can be considered that the UE is close to the TRP;

[0268] The relative distance between the UE and the TRP / gNB, for example, the relative distance is less than a certain threshold, which can be considered that the UE is close to the TRP.

[0269] 8) Relative position or distance between the terminal and the satellite;

[0270] Optionally, the relative position or distance between the terminal and the satellite includes:

[0271] The measurement value of the target reference signal, for example: the measurement value of the reference signal is greater than a certain threshold, which can be considered that the UE is close to the satellite;

[0272] The relative distance between the UE and the satellite, for example, the relative distance is less than a certain threshold, which can be considered that the UE is close to the satellite.

[0273] 9) Whether it has the ability to obtain GNSS coordinates, or whether the GNSS coordinates are available or reliable;

[0274] It can be understood that if there is no reliable GNSS information or no GNSS capability, the terminal can use Type A access in this case, that is, completely compensated by the network side.

[0275] 10) Whether the uplink synchronization is lost, and / or the time of losing the uplink synchronization;

[0276] For example, if the uplink synchronization is lost or the time of losing exceeds a certain threshold, it can be considered that the UE pre-compensation is invalid, at which time Type A access can be re-adopted, and completely compensated by the network side.

[0277] 11) the number of uplink transmission failures;

[0278] Optionally, the number of uplink transmission failures is accumulated in a configured or agreed time window, or the number of consecutive uplink transmission failures.

[0279] For example, if the number of uplink transmission failures exceeds a certain threshold, it can be considered that the UE pre-compensation is invalid, at which time Type A access can be re-adopted and completely compensated by the network side.

[0280] 12) first information, the first information comprising at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level;

[0281] Reference can be made to the description in the foregoing embodiments, which will not be repeated here.

[0282] 13) signal characteristics associated with or determined by the first information;

[0283] Reference can be made to the description in the foregoing embodiments, which will not be repeated here.

[0284] 14) second information, the second information comprising at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit position information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0285] 15) signal characteristics associated with or determined by the second information;

[0286] 16) signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0287] For example, CP length, guard size between different parts of the signal, signal format, OFDM waveform, DFT-s-OFDM waveform, etc.

[0288] 17) whether it is a multi-transmission-reception-point scenario;

[0289] 18) the relationship between the target cell and the neighboring cell or neighboring cell group;

[0290] Optionally, the relationship between the target cell and the neighboring cell or neighboring cell group comprises at least one of the following:

[0291] whether it is coverage overlap or not;

[0292] whether it is different frequency or different frequency;

[0293] whether it is co-sited;

[0294] Whether same band or not.

[0295] It should be noted that the target cell here refers to the current concerned cell, such as a serving cell or a target access cell.

[0296] 19) Relationship between the adjacent transceiver unit or the adjacent transceiver unit group and the target TRP;

[0297] Optionally, the relationship between the adjacent transceiver unit or the adjacent transceiver unit group and the target TRP includes at least one of the following:

[0298] Whether coverage is overlapped or not overlapped;

[0299] Whether different beams or same beams;

[0300] Whether co-sited or not.

[0301] It should be noted that the target TRP here refers to the TRP currently connected by the terminal.

[0302] Optionally, the terminal determines the compensation type of the TA and / or FO according to the third information or the first mapping relationship and the first preset value; wherein the first mapping relationship is a mapping or association relationship of one or more information in the third information to different compensation types of TA and / or FO; the first preset value is used to indicate one mapping relationship in the first mapping relationship, and the first preset value is configured by the first network or predefined.

[0303] Optionally, the first mapping relationship can be predefined, can be represented by a table defined by a protocol or a list defined by signaling, one or more relationship tables can be defined, and which one to use can be determined by network configuration and / or in advance.

[0304] In the embodiments of the present application, the terminal can determine the compensation type of the TA and / or FO according to the third information or the first mapping relationship and the first preset value for determining the compensation type of the TA and / or FO, and then determine the first compensation value, and perform TA and / or FO compensation according to the first compensation value, thereby reducing the TA and / or FO in the communication process and improving the communication quality.

[0305] Optionally, the compensation type of the TA and / or FO includes one of the following:

[0306] The terminal only compensates for the first TA and / or the first FO, and the first network compensates for other TA and / or FO compensation values except the first TA and / or the first FO;

[0307] The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates for other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value.

[0308] The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO according to one or more reference information, and the first network does not compensate for TA and / or FO.

[0309] The first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated according to a reference signal.

[0310] The first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated according to a reference signal.

[0311] It can be understood that the compensation types of TA and / or FO provided in the embodiments of the present application include the following three ways:

[0312] The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates for other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value.

[0313] The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates for other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value.

[0314] In this way, the first compensation value is a fixed compensation value, that is, the TA and / or FO fixed compensation value described above, which is preset or determined through network configuration.

[0315] The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO according to one or more reference information, and the first network does not compensate for TA and / or FO.

[0316] In this case, the first compensation value is a dynamically changing compensation value, i.e., a TA and / or FO compensation value other than the first TA and / or the first FO, and the first compensation value is calculated according to one or more reference information.

[0317] The communication method provided by the embodiments of the present application defines three compensation types of TA and / or FO, is suitable for unified air interface design of ground and non-ground networks, and can improve communication efficiency.

[0318] After determining the compensation type of TA and / or FO, the terminal can determine the first compensation value according to the compensation type of TA and / or FO, including one of the following:

[0319] If the compensation type of TA and / or FO is the above-mentioned mode one, the terminal does not compensate;

[0320] If the compensation type of TA and / or FO is the above-mentioned mode two, the terminal obtains a fixed compensation value;

[0321] If the compensation type of TA and / or FO is the above-mentioned mode three, the terminal determines a dynamic compensation value according to reference information and a calculation method.

[0322] The following describes the case where the compensation type of TA and / or FO is the above-mentioned mode two, and the terminal obtains a fixed compensation value.

[0323] In some embodiments, the determination of the first compensation value includes one of the following:

[0324] 1) receiving the first compensation value configured or indicated by the first network;

[0325] Optionally, the first compensation value is configured by the first network through downlink control information DCI or media access control control element MAC CE or radio resource control RRC.

[0326] Optionally, the first compensation value can be configured in granularity of (per) TAG, SSB, Cell, Cell group, TRP, TRP group, Satellite, Satellite group, beam, or beam group.

[0327] In the case where the terminal accesses a service cell, the first compensation value is indicated by the service cell through first signaling, and the first signaling includes random access response RAR or Msg4 or MsgB signaling.

[0328] In the case that the terminal migrates from a serving cell to a target cell or the terminal connects to multiple cells, the first compensation value is indicated by a neighbor cell, the first compensation value is a compensation value indicated by the neighbor cell to the connected terminal, or the first compensation value is calculated by the neighbor cell based on geographical position information of the target cell and / or a state of the terminal.

[0329] It should be noted that the neighbor cell here is a neighbor cell of the target cell. If the terminal migrates from a serving cell to a target cell, the serving cell is a neighbor cell; if the terminal connects to multiple cells, the target cell is one of the multiple cells, and other cells in the multiple cells are each a neighbor cell of the target cell.

[0330] For example, the TN cell provides a UE in the coverage of the neighbor NTN cell with a pre-compensation value of TA and / or FO.

[0331] For another example, the pre-compensation value provided by the alternative cell (i.e., the neighbor cell) for the UE of the target cell can be directly using the pre-compensation value indicated by the alternative cell to its own UE.

[0332] Optionally, the first compensation value is calculated by the neighbor cell based on geographical position information (such as GNSS information / ephemeris / moving track / speed, etc.) of the target cell.

[0333] Optionally, the first compensation value is calculated by the neighbor cell based on geographical position information (such as GNSS information / ephemeris / moving track / speed, etc.) of the target cell and a state of the UE (such as GNSS of the UE).

[0334] 2) determining the first compensation value according to the fourth information;

[0335] Optionally, the fourth information includes at least one of the following:

[0336] Second information, the second information includes at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit position information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0337] a signal feature associated with or determined by the second information;

[0338] First information, the first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level;

[0339] a signal feature associated with or determined by the first information;

[0340] a signal type and / or a waveform and / or a subcarrier spacing and / or a modulation order and / or a resource mapping type and / or whether it is a backscatter communication;

[0341] whether it is a multi-TRP scenario;

[0342] a relationship between a neighbor cell or a neighbor cell group and a target cell;

[0343] a relationship between a neighbor transceiver unit or a neighbor transceiver unit group and a target TRP;

[0344] a network implementation;

[0345] It can be understood that the compensation value of the TA and / or FO on the terminal side is related to the network type information, the compensation type or capability of the terminal, the signal type and / or the waveform and / or the subcarrier spacing and / or whether it is a backscatter communication, the relationship between the neighbor cell or the neighbor cell group and the target cell, and the relationship between the neighbor transceiver unit or the neighbor transceiver unit group and the target TRP.

[0346] The understanding of each item of information in the fourth information can refer to the description in the foregoing embodiments, which will not be described here again.

[0347] 3) determining the first compensation value according to the second mapping relationship and a second preset value;

[0348] The second mapping relationship is a mapping or association relationship of one or more items of information in the fourth information to different TA compensation values and / or FO compensation values, and the second preset value is used to indicate one mapping relationship in the second mapping relationship. The second mapping relationship and the second preset value are configured by the first network or predefined.

[0349] 4) determining the first compensation value according to a third mapping relationship.

[0350] The third mapping relationship includes one of the following:

[0351] a mapping or association relationship of a synchronization signal block (SSB) to different TA compensation values and / or FO compensation values;

[0352] a mapping or association relationship of a random access opportunity (RO) to different TA compensation values and / or FO compensation values;

[0353] a mapping or association relationship of a round trip time (RTT) range to different TA compensation values and / or FO compensation values;

[0354] a mapping or association relationship of a global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values;

[0355] a mapping or association relationship of a region or a set of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values;

[0356] The third mapping relationship is the first network configuration or predefined.

[0357] It can be understood that the terminal only compensates for the determined TA and / or FO, in which case the network side can associate different pre-compensation values with SSB / RO / RTT ranges / GNSS coordinate ranges / some inner-outer diameter range corresponding regions / a set of beams, and when the UE meets the above conditions or uses the related resources to access, the corresponding values are applied.

[0358] The communication method provided by the embodiments of the present application can compensate for TA and / or FO in the case where the terminal only supports compensating for TA and / or FO according to a fixed value, thereby reducing TA and / or FO in the communication process and improving communication quality.

[0359] The following describes the determination of a dynamic compensation value by the terminal according to reference information and a calculation method when the compensation type of TA and / or FO is the third mode described above.

[0360] In some embodiments, the determination of the first compensation value comprises:

[0361] According to one or more reference information, the first compensation value is determined by using a predefined or first network configured calculation method.

[0362] In the embodiments of the present application, the reference information comprises at least one of the following:

[0363] 1) fifth information of the terminal, the fifth information comprising at least one of the following: GNSS coordinates, speed, movement trajectory;

[0364] 2) sixth information of a satellite or ground device, the sixth information comprising at least one of the following: position, ephemeris, movement trajectory;

[0365] 3) second information, the second information comprising at least one of the following: network height, network coverage size, network transceiver speed size, network transceiver position information, network transceiver power size, network transceiver crystal oscillator level;

[0366] 4) signal characteristics associated with or determined by the second information;

[0367] 5) first information, the first information comprising at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level;

[0368] 6) signal characteristics associated with or determined by the first information;

[0369] 7) whether it is a multi-transmission-reception point scenario;

[0370] 8) the relationship between the neighboring cell or the neighboring cell group and the target cell;

[0371] 9) the relationship between the neighboring transceiver unit or the neighboring transceiver unit group and the target TRP.

[0372] The understanding of each of the above reference information can refer to the description in the foregoing embodiments, which will not be repeated here.

[0373] In some embodiments, the calculation method is used to calculate the TA and / or FO compensation value required by the terminal to compensate, or, on the basis of the calculation method of one or more other mechanisms, to calculate the TA and / or FO increment required to be compensated in addition to the first TA and / or the first FO, wherein the first TA includes N TA and N TA,offset , and the first FO includes the FO estimated and compensated only according to the reference signal.

[0374] In some embodiments, the reference information or the calculation method is configured by DCI or MAC CE or RRC;

[0375] Optionally, in the case where the terminal accesses a serving cell, the reference information or the calculation method is indicated by the serving cell through first signaling, and the first signaling includes one of the following: RAR, Msg4, MsgB;

[0376] Optionally, in the case where the terminal migrates from a serving cell to a target cell, or the terminal is connected to multiple cells, the reference information or the calculation method is indicated by a neighboring cell.

[0377] It should be noted that the neighboring cell here is the neighboring cell of the target cell. If the terminal migrates from the serving cell to the target cell, the serving cell is the neighboring cell; if the terminal is connected to multiple cells, the target cell is one of the multiple cells, and each of the other cells in the multiple cells is a neighboring cell of the target cell.

[0378] For example, a TN cell provides the reference information or the calculation method to a UE in the coverage range of a neighbor NTN cell.

[0379] For another example, a replacement cell (i.e., a neighboring cell) provides the reference information or the calculation method to a UE of a target cell. It can be the reference information or the calculation method indicated by the replacement cell to its own UE.

[0380] Optionally, when the terminal obtains the pre-compensation value of the target cell or the reference information or the calculation method for determining the pre-compensation value from the neighboring cell (which can be referred to as the alternative cell), the target cell selects the alternative cell, or the conditions for the terminal to select the alternative cell include at least one of the following:

[0381] The distance to the target cell is close, for example, determined by GNSS coordinates;

[0382] The measurement quantity of the reference signal meets a certain threshold, for example, RSRP / RSRQ meets a certain threshold;

[0383] Possesses GNSS capability;

[0384] The information related to the target cell or the terminal is valid within a certain period of time, which can be maintained by setting a timer;

[0385] The geographical position information (such as GNSS information / ephemeris / moving track / speed, etc.) of the alternative cell;

[0386] The geographical position information (such as GNSS information / ephemeris / moving track / speed, etc.) of the target cell;

[0387] The post-compensation capability (type) and granularity of the alternative cell and / or the target cell;

[0388] The pre-compensation capability (type) and granularity of the terminal;

[0389] The information validity period of the alternative cell related to the target cell or the terminal.

[0390] The communication method provided by the embodiments of the present application can realize dynamic compensation of TA and / or FO in the case that the terminal supports determining the dynamic compensation value according to the reference information and the calculation method, thereby improving the communication reliability and the communication efficiency.

[0391] In some embodiments, the granularity of the TA and / or FO compensation configuration or taking effect includes one of the following:

[0392] One synchronization signal block or synchronization signal block group;

[0393] One cell or cell group;

[0394] One transmission and reception point or transmission and reception point group;

[0395] One satellite or satellite group;

[0396] One beam or beam group;

[0397] One timing advance group;

[0398] One tracking area or tracking area group;

[0399] one RNA or RNA group;

[0400] and / or, granularity of the first compensation value, comprising one of:

[0401] one synchronization signal block or synchronization signal block group;

[0402] one cell or cell group;

[0403] one transmission reception point or transmission reception point group;

[0404] one satellite or satellite group;

[0405] one beam or beam group;

[0406] one timing advance group;

[0407] one tracking area or tracking area group;

[0408] one RNA or RNA group.

[0409] The communication method provided by the embodiments of the present application defines the granularity of TA and / or FO compensation configuration or taking effect, supports compensation of TA and / or FO according to different granularity, and improves system flexibility.

[0410] In some other embodiments, the determining the first compensation value comprises one of:

[0411] receiving first configuration information, wherein the first configuration information comprises one of: the first compensation value; reference information used for determining the first compensation value; reference information and a calculation method used for determining the first compensation value; seventh information used for determining the first compensation value;

[0412] determining the first compensation value according to the first configuration information.

[0413] It can be understood that in the present embodiment, the terminal can not determine the compensation type of TA and / or FO, but determine the first compensation value according to the received first configuration information.

[0414] Optionally, the first configuration information comprises the first compensation value, and the terminal can perform TA and / or FO compensation according to the first compensation value.

[0415] Optionally, the first configuration information comprises reference information, and the terminal determines the first compensation value according to the reference information and a predefined or preconfigured calculation method / function / formula.

[0416] Optionally, the first configuration information comprises reference information and a calculation method, and the terminal determines the first compensation value according to the reference information and the calculation method.

[0417] It should be noted that the calculation method can be replaced by a calculation function, a calculation formula, etc.

[0418] Optionally, the first configuration information includes seventh information for determining the first compensation value, and the first compensation value is determined according to the seventh information for determining the first compensation value.

[0419] The seventh information for determining the first compensation value includes at least one of the following:

[0420] 1) fifth information of the terminal, the fifth information including at least one of the following: GNSS coordinates, speed, movement trajectory;

[0421] 2) sixth information of the satellite or ground device, the sixth information including at least one of the following: position, ephemeris, movement trajectory;

[0422] 3) fourth information;

[0423] The fourth information includes at least one of the following:

[0424] Second information, the second information including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit position information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0425] Signal characteristics associated with or determined by the second information;

[0426] First information, the first information including at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level;

[0427] Signal characteristics associated with or determined by the first information;

[0428] Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0429] Whether it is a multi-transmission-reception point scenario;

[0430] Relationship of adjacent cells or adjacent cell groups and target cells;

[0431] Relationship between adjacent transceivers or adjacent transceiver groups and target TRPs;

[0432] 4) second mapping relationship;

[0433] The second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values.

[0434] 5) a second preset value;

[0435] The second preset value is used to indicate a mapping relationship in the second mapping relationship.

[0436] 6) a third mapping relationship;

[0437] The third mapping relationship includes one of the following:

[0438] A mapping or association relationship of a synchronization signal block (SSB) to different TA compensation values and / or FO compensation values;

[0439] A mapping or association relationship of a random access opportunity (RO) to different TA compensation values and / or FO compensation values;

[0440] A mapping or association relationship of a round trip time (RTT) range to different TA compensation values and / or FO compensation values;

[0441] A mapping or association relationship of a global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values;

[0442] A mapping or association relationship of a preset inner-outer diameter range corresponding region or a group of beams to different TA compensation values and / or FO compensation values.

[0443] The understanding of each item of information in the seventh information used to determine the first compensation value described above can refer to the description in the foregoing embodiments, which will not be repeated here.

[0444] The communication method provided by the embodiments of the present application can be applied to a unified air interface design by receiving the first configuration information and determining the first compensation value according to the first configuration information, so as to improve the communication efficiency.

[0445] In some embodiments, the terminal determines to access a first network, including one of the following:

[0446] The terminal determines to access the first network according to the first capability information.

[0447] The terminal determines a first network matching the first capability information of the terminal according to the first capability information and the network type related information of the plurality of networks, and accesses the first network.

[0448] In some embodiments, the method further includes:

[0449] In the case that the terminal occurs cell switching, the terminal accesses a target cell when a first condition is met.

[0450] The first condition includes at least one of the following:

[0451] The network type related information of the target cell matches the first capability information of the terminal;

[0452] The terminal can acquire the geographic location information related to the target cell and / or the parameter information and calculation method required for determining the TA and / or FO compensation value;

[0453] In the case where the network type related information of the target cell does not match the first capability information of the terminal, an alternative cell assists the terminal in TA and / or FO compensation.

[0454] It can be understood that when the UE performs cell switching, it is necessary to consider whether the target cell can meet the requirement of the UE on pre-compensation capability, such as Type A UE requiring access to Type 1 network, otherwise normal communication cannot be performed.

[0455] In some embodiments, the UE considers at least one of the following rules when performing cell selection / reselection:

[0456] 1) whether the post-compensation capability of the target cell matches the pre-compensation capability of the UE;

[0457] The matching means that the TA and / or FO that cannot be completely pre-compensated by the UE under the current pre-compensation capability of the UE can be covered by the post-compensation capability of the target cell;

[0458] 2) whether the UE has geographic location information related to the target cell and / or parameters / formulas required for determining the pre-compensation value, so as to calculate the pre-compensation value;

[0459] 3) whether there is an alternative cell assisting the UE in pre-compensation, so that the UE matches the post-compensation capability of the target cell after pre-compensation;

[0460] In some embodiments, if the UE detects or selects a cell but finds a mismatch, the terminal considers that there is no suitable cell, or the terminal considers that it is barred by the cell, or the terminal performs cell reselection.

[0461] The mismatch means that the post-compensation capability of the target cell cannot cover the TA and / or FO that cannot be completely pre-compensated by the UE under the current pre-compensation capability of the UE;

[0462] For example, the UE needs to be compensated by the base station, but the SIB indicates an offset, which implies that the base station expects the UE to compensate, at this time, the network type related information of the target cell does not match the first capability information of the terminal.

[0463] In the embodiments of the present application, the cell reselection rule based on whether the UE compensation capability and the network side compensation capability match is defined, the communication failure problem caused by the UE accessing the unmatched network is avoided, and the communication efficiency can be improved.

[0464] The communication method provided by the above embodiments of the present application defines a plurality of UE types and network types supporting TA and / or FO pre-compensation or post-compensation, and proposes a related UE compensation capability reporting and network compensation capability indication method, an indication or determination method of the compensation type and compensation value of TA and / or FO, and a cell reselection rule based on whether the UE compensation capability and the network side compensation capability match, so as to realize the unified air interface design of the ground and non-ground networks.

[0465] FIG. 3 is a flowchart of the communication method provided by the embodiments of the present application. As shown in FIG. 3, the communication method comprises the following steps:

[0466] In step 310, a first operation is performed, and the first operation comprises at least one of the following:

[0467] sending network type related information to the terminal;

[0468] obtaining first capability information of the terminal;

[0469] determining the type of TA and / or FO compensation according to the first capability information of the terminal and / or the network type related information;

[0470] determining first configuration information according to the type of TA and / or FO compensation, sending the first configuration information to the terminal, and the first configuration information comprises at least one of the following: the first compensation value; reference information for determining the first compensation value; a calculation method for determining the first compensation value; seventh information for determining the first compensation value;

[0471] determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on the first signal according to the second compensation value.

[0472] It can be understood that the network side device can send network type related information to the terminal, and / or obtain the first capability information of the terminal, and / or determine the type of TA and / or FO compensation according to the first capability information of the terminal and / or the network type related information, and / or determine the first configuration information according to the type of TA and / or FO compensation, and / or determine the second compensation value according to the type of TA and / or FO compensation, and the second compensation value is the value of the network side compensation for TA and / or FO.

[0473] In the embodiments of the present application, the network side device interacts with the terminal to obtain the first capability information of the terminal, the network type related information, or the network side device determines the type of TA and / or FO compensation according to the first capability information of the terminal and / or the network type related information, determines the first configuration information, and sends the first configuration information to the terminal, so that the terminal can determine the first compensation value according to the supported TA and / or FO compensation type, and additional compensation of TA and / or FO is realized, the communication quality and efficiency are improved, and unified air interface design of ground and non-ground networks is realized.

[0474] Optionally, the TA and / or FO compensation type includes one of the following:

[0475] The terminal only compensates the first TA and / or the first FO, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO;

[0476] The terminal compensates the first TA and / or the first FO, and compensates according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value;

[0477] The terminal compensates the first TA and / or the first FO, and compensates according to other TA and / or FO compensation values except the first TA and / or the first FO calculated according to one or more reference information, and the first network does not compensate TA and / or FO;

[0478] The first TA includes N TA and N TA,offset , and the first FO includes FO only compensated according to reference signals.

[0479] Optionally, the first capability information includes at least one of the following:

[0480] The compensation type or capability of the terminal includes one of the following: only compensating the first TA and / or the first FO; compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating the first TA and / or the first FO, and compensating according to other TA and / or FO compensation values except the first TA and / or the first FO calculated according to one or more reference information;

[0481] Whether to support compensation of other TA except the first TA and TA compensation granularity;

[0482] Whether to support compensation of other FO except the first FO and FO compensation granularity;

[0483] whether network compensates TA and / or FO, including at least one of: network compensates TA and / or FO compensation values other than the first TA and / or the first FO; network compensates TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal; network does not compensate TA and / or FO;

[0484] the network compensation type or operation expected or preferred by the terminal;

[0485] wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0486] Optionally, the first capability information of the terminal is acquired, including one of:

[0487] receiving a second signal, wherein the second signal or parameters or resources of the second signal are associated with the first capability information;

[0488] receiving high layer signaling, wherein the first capability information of the terminal is carried in the high layer signaling;

[0489] receiving MAC layer signaling, wherein the first capability information of the terminal is carried in the MAC layer signaling;

[0490] receiving physical layer signaling, wherein the first capability information of the terminal is carried in the physical layer signaling.

[0491] wherein the second signal includes one or more signals. The second signal or parameters or resources of the second signal are associated with the first capability information. It can be understood that the terminal uses at least one signal or signal parameter associated with the first capability information, or the terminal uses the resources of a signal associated with the first capability information. Different capability types correspond to different resources of the same signal; for example, the associated signal is PRACH, and different UE compensation types or TA and / or FO pre-compensation capabilities correspond to different PRACH resources.

[0492] Optionally, the network type related information includes one of:

[0493] network compensation type, including one of: compensating TA and / or FO compensation values other than the first TA and / or the first FO; compensating TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal; not compensating TA and / or FO; supported compensation granularity; wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0494] a service or a traffic or a quality of service or a quality of service flow identifier QFI or a quality of service class identifier QCI associated with the network compensation type;

[0495] whether to support TA compensation other than the first TA and a TA compensation granularity;

[0496] whether to support FO compensation other than the first FO and a FO compensation granularity;

[0497] a desired or preferred compensation type;

[0498] a desired or required compensation capability or type and a compensation granularity that the terminal is required to have;

[0499] a service or a traffic or a quality of service or a QFI or a QCI associated with the terminal compensation capability or type and the compensation granularity;

[0500] one or more preset field values for indicating whether the terminal is required to support TA and / or FO compensation and a compensation granularity, or for indicating a compensation capability or type and a compensation granularity that the terminal is required to have.

[0501] Optionally, the network type related information is determined according to at least one of the following:

[0502] second information, the second information including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0503] a signal feature associated with or determined by the second information.

[0504] Optionally, the sending of the network type related information to the terminal includes one of the following:

[0505] explicitly indicating the network type related information, or the network compensation type and the corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling;

[0506] indicating the compensation type or capability that the terminal is required to have, or the compensation type or capability that the terminal is required to have and the corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling;

[0507] sending one or more third signals to the terminal, the resource or information corresponding to the one or more third signals being associated with the network type related information, or the network compensation type and the corresponding compensation granularity.

[0508] Optionally, the network side device indicates the network type related information, or the network compensation type and the corresponding compensation granularity, explicitly through system or broadcast message or groupcast or dedicated signaling.

[0509] Optionally, the network side device indicates the compensation type or capability that the terminal needs to have, or the compensation type or capability that the terminal needs to have and the corresponding compensation granularity, implicitly through system or broadcast message or groupcast or dedicated signaling.

[0510] For example, the TA pre-compensation value applied by the terminal or the parameter or formula for determining the pre-compensation value is indicated through the MIB or SIB field.

[0511] If the value of the pre-compensation required by the UE is 0, it means that the network side type is Type 1.

[0512] If the value of the pre-compensation required by the UE is a determined value or a group of determined values, it means that the network side type is Type 2.

[0513] If the value of the pre-compensation required by the UE is a value that changes over time or motion trajectory or position, it means that the network side type is Type 3.

[0514] Optionally, the network side device indicates the network type related information, or the network compensation type and the corresponding compensation granularity, through sending one or more third signals, and the resource or information corresponding to the one or more third signals is associated with the network type related information, or the network compensation type and the corresponding compensation granularity, of the first network. Correspondingly, the terminal receiving the one or more third signals can determine the network type related information, or the network compensation type and the corresponding compensation granularity, of the first network.

[0515] For example, the third signal is RACH or other resource.

[0516] Optionally, the RACH configuration under type 1 / 2 / 3 is different, for example, the IE (Information Element) name of the configured RACH is different, or the RACH preamble / RO, or the PRACH format, or the interval between SSB and RO, the starting mapping interval (or the interval with RAR, etc.) is designed differently, and through the association between the network side capability and the specific RACH configuration, the UE can know the network type or preference.

[0517] For example, the mode (pattern), density, period, etc. of the broadcast SSB correspond to different network types or preferences.

[0518] Optionally, the network-side device implicitly indicates information for determining network type related information through system or broadcast message or groupcast or dedicated signaling, and the terminal determines the network type related information of the first network, or the network compensation type and the corresponding compensation granularity according to the information for determining the network type related information.

[0519] For example, the network-side device broadcasts the pattern, density, period, etc. of SSB corresponding to different network heights, and then the terminal determines the network type related information corresponding to the height, or the network compensation type and the corresponding compensation granularity.

[0520] In the embodiments of the present application, the network determines the compensation type of TA and / or FO according to the first capability information and / or the network type related information, and further determines the first compensation value or the second compensation value according to the compensation type of TA and / or FO, so that the terminal performs TA and / or FO compensation according to the first compensation value, or the network performs TA and / or FO compensation according to the second compensation value, thereby improving the communication efficiency.

[0521] Optionally, the sending of the first configuration information to the terminal comprises one of the following:

[0522] The terminal is sent with downlink control information DCI or media access control control element MAC CE or radio resource control RRC, and the first configuration information is carried in the downlink control information DCI or media access control control element MAC CE or radio resource control RRC.

[0523] The first configuration information is indicated through first signaling, and the first signaling comprises random access response RAR or Msg4 or MsgB signaling.

[0524] In the case that the terminal migrates from a serving cell to a target cell or the terminal is connected to multiple cells, the first configuration information is indicated through a neighbor cell.

[0525] Optionally, the reference information comprises at least one of the following:

[0526] The fifth information of the terminal, and the fifth information comprises at least one of the following: GNSS coordinates, speed, movement trajectory.

[0527] The sixth information of the satellite or the ground device, and the sixth information comprises at least one of the following: position, ephemeris, movement trajectory.

[0528] The second information, and the second information comprises at least one of the following: network height, network coverage size, speed size of a network transceiver unit, position information of a network transceiver unit, power size of a network transceiver unit, and crystal oscillator level of a network transceiver unit.

[0529] a signal feature associated with or determined by the second information;

[0530] first information, the first information comprising at least one of: a terminal height, a terminal hardware type, a terminal speed size, terminal position information, a terminal power level, a terminal crystal oscillator level;

[0531] a signal feature associated with or determined by the first information;

[0532] whether it is a multi-transmission-reception-point scenario;

[0533] a relationship between a neighboring cell or a neighboring cell group and a target cell;

[0534] a relationship between a neighboring transceiver unit or a neighboring transceiver unit group and a target TRP.

[0535] Optionally, the seventh information comprises at least one of:

[0536] fourth information;

[0537] fifth information of the terminal, the fifth information comprising at least one of: GNSS coordinates, speed, movement trajectory;

[0538] sixth information of a satellite or a ground device, the sixth information comprising at least one of: position, ephemeris, movement trajectory;

[0539] a second mapping relationship;

[0540] a second preset value;

[0541] a third mapping relationship;

[0542] The fourth information comprises at least one of:

[0543] second information, the second information comprising at least one of: a network height, a network coverage size, a network transceiver unit speed size, network transceiver unit position information, a network transceiver unit power size, a network transceiver unit crystal oscillator level;

[0544] a signal feature associated with or determined by the second information;

[0545] first information, the first information comprising at least one of: a terminal height, a terminal hardware type, a terminal speed size, terminal position information, a terminal power level, a terminal crystal oscillator level;

[0546] a signal feature associated with or determined by the first information;

[0547] a signal type and / or a waveform and / or a subcarrier spacing and / or a modulation order and / or a resource mapping type and / or whether it is a backscatter communication;

[0548] whether it is a multi-transmission-reception-point scenario;

[0549] a relationship between a neighboring cell or a neighboring cell group and the target cell;

[0550] a relationship between a neighboring transceiver unit or a neighboring transceiver unit group and the target TRP;

[0551] the second mapping relationship is a mapping or an association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, and the second preset value is used to indicate one mapping relationship in the second mapping relationship;

[0552] the third mapping relationship includes one of the following:

[0553] a mapping or an association relationship of a synchronization signal block (SSB) to different TA compensation values and / or FO compensation values;

[0554] a mapping or an association relationship of a random access opportunity (RO) to different TA compensation values and / or FO compensation values;

[0555] a mapping or an association relationship of a round trip time (RTT) range to different TA compensation values and / or FO compensation values;

[0556] a mapping or an association relationship of a global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values;

[0557] a mapping or an association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values.

[0558] Optionally, the determining the second compensation value comprises:

[0559] determining the second compensation value according to eighth information;

[0560] the eighth information includes at least one of the following:

[0561] second information, the second information includes at least one of the following: a network height, a network coverage size, a speed size of a network transceiver unit, position information of a network transceiver unit, a power size of a network transceiver unit, a crystal oscillator level of a network transceiver unit, etc.

[0562] a signal feature associated with or determined by the second information;

[0563] The first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, and terminal crystal oscillator level.

[0564] Signal characteristics associated with or determined by the first information;

[0565] Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0566] Whether it is a multi-transmission-reception point scenario;

[0567] Relationship of the adjacent cell or adjacent cell group and the target cell;

[0568] Relationship between the adjacent transceiver unit or adjacent transceiver unit group and the target TRP.

[0569] The communication method provided by the embodiments of the present application takes the network side device as the execution subject. For the understanding of the communication method, reference can be made to the aforementioned terminal side communication method embodiments, and the same technical effects can be achieved, which will not be described here.

[0570] The communication method provided by the embodiments of the present application can be executed by a communication device. In the embodiments of the present application, the communication device executes the communication method, which is taken as an example to illustrate the communication device provided by the embodiments of the present application.

[0571] FIG. 4 is a structural schematic diagram of a communication device provided by the embodiments of the present application. As shown in FIG. 4, the communication device 400 includes:

[0572] The first determining unit 410 is configured to determine to access a first network.

[0573] The compensation unit 420 is configured to determine a first compensation value in the process of accessing the first network, and perform timing advance (TA) and / or frequency offset (FO) compensation on a first signal according to the first compensation value.

[0574] Optionally, the determination of the first compensation value includes:

[0575] Determining a compensation type of TA and / or FO according to the first capability information of the terminal, or according to the first capability information of the terminal and network type related information of the first network.

[0576] Determining the first compensation value according to the compensation type of TA and / or FO.

[0577] Optionally, the determination of the first compensation value includes:

[0578] Determining a compensation type of TA and / or FO.

[0579] determining the first compensation value according to the compensation type of the TA and / or FO.

[0580] Optionally, the determining the first compensation value comprises one of the following:

[0581] receiving first configuration information, the first configuration information comprising at least one of the following: the first compensation value; reference information used for determining the first compensation value; a calculation method used for determining the first compensation value; seventh information used for determining the first compensation value;

[0582] determining the first compensation value according to the first configuration information.

[0583] Optionally, the compensation type of the TA and / or FO comprises one of the following:

[0584] the terminal compensates only the first TA and / or the first FO, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO;

[0585] the terminal compensates the first TA and / or the first FO, and compensates according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value;

[0586] the terminal compensates the first TA and / or the first FO, and compensates according to one or more reference information to calculate other TA and / or FO compensation values except the first TA and / or the first FO, and the first network does not compensate TA and / or FO;

[0587] wherein the first TA comprises N TA and N TA,offset , and the first FO comprises FO estimated and compensated only according to a reference signal.

[0588] Optionally, the first capability information comprises at least one of the following:

[0589] the compensation type or capability of the terminal comprises one of the following: compensating only the first TA and / or the first FO; compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating the first TA and / or the first FO, and compensating according to one or more reference information to calculate other TA and / or FO compensation values except the first TA and / or the first FO;

[0590] whether to support compensating other TA except the first TA and TA compensation granularity;

[0591] Whether to support compensation for FOs other than the first FO and the granularity of FO compensation;

[0592] Whether network compensation for TA and / or FO is needed, including at least one of the following: network compensation for TA and / or FO compensation values other than the first TA and / or the first FO, network compensation for TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal, network not compensating for TA and / or FO;

[0593] The network compensation type or operation expected or preferred by the terminal;

[0594] The first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0595] Optionally, the first capability information is determined according to at least one of the following:

[0596] The first information includes at least one of the following: height of the terminal, hardware type of the terminal, speed of the terminal, position information of the terminal, power level of the terminal, crystal oscillator level of the terminal;

[0597] Signal characteristics associated with or determined by the first information;

[0598] Frequency information;

[0599] Whether it is a multi-carrier service scenario;

[0600] Whether it is terrestrial communication or non-terrestrial communication;

[0601] Transmission mode of the terminal;

[0602] Whether to support multi-transmission and reception point transmission;

[0603] The type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type of the supported signals;

[0604] Whether it is backscatter communication;

[0605] Whether to support dual connectivity and / or combination of dual connectivity;

[0606] Whether to support frequency division full duplex, sub-band full duplex, or simultaneous same frequency full duplex;

[0607] Supported power level;

[0608] Whether to support broadcast and / or multicast;

[0609] Whether to support SFN;

[0610] whether to support multiple-input multiple-output (MIMO) transmission;

[0611] maximum number of layers of MIMO transmission supported;

[0612] whether to support hybrid automatic repeat request (HARQ) transmission or disable HARQ feedback;

[0613] whether to support carrier aggregation (CG) or semi-persistent scheduling (SPS) transmission;

[0614] type of CG or SPS transmission supported;

[0615] supported measurement gap;

[0616] whether to support low-layer triggered mobility (LTM) and / or conditional handover.

[0617] Optionally, the method further comprises:

[0618] reporting the first capability information to the first network;

[0619] the reporting manner of the first capability information comprises one of the following:

[0620] using at least one signal or parameter of a signal associated with the first capability information;

[0621] using a resource of a signal associated with the first capability information, different capability types corresponding to different resources of the same signal;

[0622] reporting through high-layer signaling;

[0623] reporting through MAC layer signaling;

[0624] reporting through physical layer signaling.

[0625] Optionally, the network type related information comprises one of the following:

[0626] network compensation type, comprising one of the following: compensating for other TA and / or FO compensation values except for the first TA and / or the first FO; compensating for other TA and / or FO compensation values except for the first TA and / or the first FO and TA and / or FO fixed compensation values compensated by the terminal; not compensating for TA and / or FO; supported compensation granularity; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises FO estimated and compensated only according to a reference signal;

[0627] service or service type or quality of service or quality of service flow identifier (QFI) or quality of service classification identifier (QCI) associated with the network compensation type;

[0628] whether to support TA compensation other than the first TA and TA compensation granularity;

[0629] whether to support FO compensation other than the first FO and FO compensation granularity;

[0630] desired or preferred compensation type;

[0631] desired or required compensation capability or type and compensation granularity of the terminal;

[0632] service or service quality or QFI or QCI associated with the terminal compensation capability or type and compensation granularity;

[0633] one or more preset field values for indicating whether the terminal is required to support TA and / or FO compensation and compensation granularity, or for indicating the compensation capability or type and compensation granularity required to be possessed by the terminal.

[0634] Optionally, the network type related information is determined according to at least one of the following:

[0635] second information, the second information including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0636] signal characteristics associated with or determined by the second information.

[0637] Optionally, further comprising:

[0638] a first obtaining unit for obtaining the network type related information;

[0639] the obtaining of the network type related information includes one of the following:

[0640] receiving the network type related information explicitly indicated through system or broadcast message or multicast or proprietary signaling, or the network compensation type and corresponding compensation granularity;

[0641] receiving the compensation type or capability required to be possessed by the terminal or the compensation type or capability required to be possessed by the terminal and corresponding compensation granularity indicated through system or broadcast message or multicast or proprietary signaling;

[0642] receiving one or more signals, the corresponding resources or information of the one or more signals being associated with the network type related information of the first network, or the network compensation type and corresponding compensation granularity;

[0643] obtaining information for determining the network type related information, determining the network type related information of the first network according to the information for determining the network type related information, or the network compensation type and the corresponding compensation granularity.

[0644] Optionally, the determining the compensation type of the TA and / or FO comprises one of the following:

[0645] determining the compensation type of the TA and / or FO according to the third information;

[0646] determining the compensation type of the TA and / or FO according to the first mapping relationship and the first preset value;

[0647] The third information comprises at least one of the following:

[0648] network type related information;

[0649] the compensation granularity corresponding to the network type related information;

[0650] the compensation type or capability of the terminal;

[0651] the compensation granularity corresponding to the compensation type or capability of the terminal;

[0652] the timing advance group or synchronization signal block or cell or cell group or transmission reception point or transmission reception point group or satellite or satellite group or beam or beam group accessed or used by the terminal, and whether a change occurs;

[0653] the cell or transmission reception point type indicated in the system message or broadcast message;

[0654] the relative position or distance between the terminal and the ground network;

[0655] the relative position or distance between the terminal and the satellite;

[0656] whether the terminal has the capability of obtaining GNSS coordinates, or whether the GNSS coordinates are available or reliable;

[0657] whether the uplink synchronization is lost, and / or the time when the uplink synchronization is lost;

[0658] the number of uplink transmission failures;

[0659] the first information, the first information comprising at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level;

[0660] a signal feature associated with or determined by the first information;

[0661] The second information includes at least one of the following: network height, network coverage size, speed size of a network transceiver unit, location information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit.

[0662] A signal feature associated with or determined by the second information;

[0663] Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0664] Whether it is a multi-transmission-reception-point scenario;

[0665] Relationship of a neighboring cell or a neighboring cell group with a target cell;

[0666] Relationship between a neighboring transceiver unit or a neighboring transceiver unit group and a target TRP;

[0667] The first mapping relationship is a mapping or association relationship of one or more information in the third information to a compensation type of different TAs and / or FOs;

[0668] The first preset value is used to indicate one mapping relationship in the first mapping relationship, and the first preset value is the first network configuration or predefinition.

[0669] Optionally, the determining the first compensation value includes one of the following:

[0670] Receiving the first network configuration or the indicated first compensation value;

[0671] Determining the first compensation value according to fourth information;

[0672] Determining the first compensation value according to the second mapping relationship and the second preset value;

[0673] Determining the first compensation value according to the third mapping relationship;

[0674] The fourth information includes at least one of the following:

[0675] The second information includes at least one of the following: network height, network coverage size, speed size of a network transceiver unit, location information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit.

[0676] A signal feature associated with or determined by the second information;

[0677] The first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, and terminal crystal oscillator level.

[0678] Signal characteristics associated with or determined by the first information;

[0679] Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0680] Whether it is a multi-transmission-reception point scenario;

[0681] Relationship of adjacent cells or adjacent cell groups and target cells;

[0682] Relationship between adjacent transceiver units or adjacent transceiver unit groups and target TRPs;

[0683] Network implementation;

[0684] The second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, the second preset value is used to indicate a mapping relationship in the second mapping relationship, and the second mapping relationship and the second preset value are the first network configuration or predefinition;

[0685] The third mapping relationship includes one of the following:

[0686] Mapping or association relationship of synchronization signal block (SSB) to different TA compensation values and / or FO compensation values;

[0687] Mapping or association relationship of random access opportunity (RO) to different TA compensation values and / or FO compensation values;

[0688] Mapping or association relationship of round trip time (RTT) range to different TA compensation values and / or FO compensation values;

[0689] Mapping or association relationship of global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values;

[0690] Mapping or association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values;

[0691] The third mapping relationship is the first network configuration or predefinition.

[0692] Optionally, the first compensation value is configured by the first network through downlink control information (DCI), medium access control control element (MAC CE), or radio resource control (RRC);

[0693] In a case that the terminal accesses a serving cell, the first compensation value is indicated by the serving cell through first signaling, and the first signaling includes: random access response (RAR) or Msg4 or MsgB signaling;

[0694] In a case that the terminal migrates from a serving cell to a target cell or the terminal connects multiple cells, the first compensation value is indicated by a neighbor cell, and the first compensation value is a compensation value indicated by the neighbor cell to the connected terminal, or the first compensation value is calculated by the neighbor cell based on geographical position information of the target cell and / or a state of the terminal.

[0695] Optionally, the determining the first compensation value comprises:

[0696] determining the first compensation value according to one or more reference information and using a calculation method predefined or configured by the first network;

[0697] The reference information includes at least one of the following:

[0698] fifth information of the terminal, and the fifth information includes at least one of GNSS coordinates, speed, and movement trajectory;

[0699] sixth information of a satellite or a ground device, and the sixth information includes at least one of position, ephemeris, and movement trajectory;

[0700] second information, and the second information includes at least one of network height, network coverage size, speed size of a network transceiver unit, position information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit;

[0701] a signal feature associated with or determined by the second information;

[0702] first information, and the first information includes at least one of terminal height, terminal hardware type, speed size of the terminal, position information of the terminal, power level of the terminal, and crystal oscillator level of the terminal;

[0703] a signal feature associated with or determined by the first information;

[0704] whether it is a multi-transmission-reception-point scenario;

[0705] a relationship between a neighbor cell or a neighbor cell group and a target cell;

[0706] a relationship between a neighbor transceiver unit or a neighbor transceiver unit group and a target TRP.

[0707] Optionally, the calculation method is used to calculate the TA and / or FO that the terminal needs to compensate, or, on the basis of the calculation method of one or more other mechanisms, calculate the TA and / or FO increment that needs to be compensated in addition to the first TA and / or first FO, wherein the first TA and / or first FO includes N TA and N TA,offset .

[0708] Optionally, the reference information or calculation method is configured by DCI or MAC CE or RRC;

[0709] In the case that the terminal accesses a serving cell, the reference information or calculation method is indicated by the serving cell through first signaling, wherein the first signaling includes one of the following: RAR, Msg4, MsgB;

[0710] In the case that the terminal migrates from a serving cell to a target cell, or the terminal is connected to multiple cells, the reference information or calculation method is indicated by a neighbor cell.

[0711] Optionally, the granularity of the TA and / or FO compensation configuration or taking effect includes one of the following:

[0712] one synchronization signal block or synchronization signal block group;

[0713] one cell or cell group;

[0714] one transmission and reception point or transmission and reception point group;

[0715] one satellite or satellite group;

[0716] one beam or beam group;

[0717] one timing advance group;

[0718] one tracking area or tracking area group;

[0719] one RNA or RNA group;

[0720] and / or, the granularity of the first compensation value includes one of the following:

[0721] one synchronization signal block or synchronization signal block group;

[0722] one cell or cell group;

[0723] one transmission and reception point or transmission and reception point group;

[0724] one satellite or satellite group;

[0725] one beam or beam group;

[0726] one timing advance group;

[0727] one tracking area or tracking area group;

[0728] one RNA or RNA group.

[0729] Optionally, the terminal determines to access the first network, including one of the following:

[0730] The terminal determines to access the first network according to the first capability information;

[0731] The terminal determines the first network matching the first capability information of the terminal according to the first capability information and the network type related information of the plurality of networks, and accesses the first network.

[0732] Optionally, further comprising:

[0733] The first processing unit is configured to, in a case where the terminal performs cell switching, meet a first condition, and the terminal accesses a target cell.

[0734] The first condition includes at least one of the following:

[0735] The network type related information of the target cell matches the first capability information of the terminal;

[0736] The terminal can obtain the geographic location information related to the target cell and / or the parameter information and calculation method required for determining the TA and / or FO compensation value;

[0737] In a case where the network type related information of the target cell does not match the first capability information of the terminal, there is an alternative cell assisting the terminal in TA and / or FO compensation.

[0738] The communication device provided by the embodiments of the present application can realize each process realized by the method embodiment of FIG. 2 and achieve the same technical effects. To avoid repetition, details are not repeated here.

[0739] FIG. 5 is a structural schematic diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 5, the communication device 500 includes:

[0740] The first execution unit 510 is configured to execute a first operation, and the first operation includes at least one of the following:

[0741] Sending network type related information to the terminal;

[0742] Obtaining the first capability information of the terminal;

[0743] Determining the type of TA and / or FO compensation according to the first capability information of the terminal and / or the network type related information;

[0744] determining first configuration information according to the type of the TA and / or FO compensation, and sending the first configuration information to the terminal, the first configuration information comprising at least one of the following: the first compensation value; reference information used for determining the first compensation value; a calculation method used for determining the first compensation value; and seventh information used for determining the first compensation value;

[0745] determining a second compensation value according to the type of the TA and / or FO compensation, and performing TA and / or FO compensation on the first signal according to the second compensation value.

[0746] Optionally, the type of the TA and / or FO compensation comprises one of the following:

[0747] the terminal compensates only the first TA and / or the first FO, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO;

[0748] the terminal compensates the first TA and / or the first FO, and compensates according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value;

[0749] the terminal compensates the first TA and / or the first FO, and compensates according to other TA and / or FO compensation values except the first TA and / or the first FO which are calculated according to one or more reference information, and the first network does not compensate TA and / or FO;

[0750] wherein the first TA comprises N TA and N TA,offset , and the first FO comprises FO which is estimated and compensated only according to a reference signal.

[0751] Optionally, the first capability information comprises at least one of the following:

[0752] the type or capability of the terminal comprises one of the following: compensating only the first TA and / or the first FO; compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; and compensating the first TA and / or the first FO, and compensating according to other TA and / or FO compensation values except the first TA and / or the first FO which are calculated according to one or more reference information;

[0753] whether to support compensating other TA except the first TA and a TA compensation granularity;

[0754] whether to support compensating other FO except the first FO and a FO compensation granularity;

[0755] whether network compensates TA and / or FO, including at least one of: network compensates TA and / or FO compensation values other than the first TA and / or the first FO; network compensates TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal; network does not compensate TA and / or FO;

[0756] the network compensation type or operation expected or preferred by the terminal;

[0757] wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0758] Optionally, the first capability information of the terminal is acquired, including one of:

[0759] receiving a second signal, the second signal or parameters or resources of the second signal are associated with the first capability information;

[0760] receiving high layer signaling, wherein the first capability information of the terminal is carried in the high layer signaling;

[0761] receiving MAC layer signaling, wherein the first capability information of the terminal is carried in the MAC layer signaling;

[0762] receiving physical layer signaling, wherein the first capability information of the terminal is carried in the physical layer signaling.

[0763] Optionally, the network type related information includes one of:

[0764] network compensation type, including one of: compensating TA and / or FO compensation values other than the first TA and / or the first FO; compensating TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal; not compensating TA and / or FO; supported compensation granularity; wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to reference signals.

[0765] and the service or service or service quality or quality of service flow identifier QFI or quality of service classification identifier QCI associated with the network compensation type;

[0766] whether to support TA compensation other than the first TA and TA compensation granularity;

[0767] whether to support FO compensation other than the first FO and FO compensation granularity;

[0768] expected or preferred compensation type;

[0769] a compensation capability or type and a compensation granularity that the terminal is expected or required to have;

[0770] a service or a service quality or a QFI or a QCI associated with the compensation capability or type and the compensation granularity of the terminal;

[0771] one or more preset field values for indicating whether the terminal is required to support TA and / or FO compensation and a compensation granularity, or for indicating a compensation capability or type and a compensation granularity that the terminal is required to have.

[0772] Optionally, the network type related information is determined according to at least one of the following:

[0773] second information, the second information including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0774] a signal feature associated with or determined by the second information.

[0775] Optionally, the sending of the network type related information to the terminal includes one of the following:

[0776] explicitly indicating the network type related information, or a network compensation type and a corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling;

[0777] indicating a compensation type or capability that the terminal is required to have, or a compensation type or capability that the terminal is required to have and a corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling;

[0778] sending one or more third signals to the terminal, the resource or information corresponding to the one or more third signals being associated with the network type related information, or a network compensation type and a corresponding compensation granularity.

[0779] Optionally, the sending of the first configuration information to the terminal includes one of the following:

[0780] sending downlink control information DCI or media access control control element MAC CE or radio resource control RRC to the terminal, the downlink control information DCI or media access control control element MAC CE or radio resource control RRC carrying the first configuration information;

[0781] indicating the first configuration information through first signaling, the first signaling including: random access response RAR or Msg4 or MsgB signaling;

[0782] In a case that the terminal migrates from a serving cell to a target cell or the terminal connects multiple cells, the first configuration information is indicated by a neighbor cell.

[0783] Optionally, the reference information comprises at least one of:

[0784] fifth information of the terminal, the fifth information comprising at least one of: GNSS coordinates, speed, moving track;

[0785] sixth information of a satellite or a ground device, the sixth information comprising at least one of: position, ephemeris, moving track;

[0786] second information, the second information comprising at least one of: network height, network coverage size, speed size of a network transceiver unit, position information of the network transceiver unit, power size of the network transceiver unit, crystal oscillator level of the network transceiver unit;

[0787] a signal feature associated with or determined by the second information;

[0788] first information, the first information comprising at least one of: terminal height, terminal hardware type, speed size of the terminal, position information of the terminal, power level of the terminal, crystal oscillator level of the terminal;

[0789] a signal feature associated with or determined by the first information;

[0790] whether it is a multi-transmission-reception point scenario;

[0791] a relationship between a neighbor cell or a neighbor cell group and the target cell;

[0792] a relationship between a neighbor transceiver unit or a neighbor transceiver unit group and the target TRP.

[0793] Optionally, the seventh information comprises at least one of:

[0794] fourth information;

[0795] fifth information of the terminal, the fifth information comprising at least one of: GNSS coordinates, speed, moving track;

[0796] sixth information of a satellite or a ground device, the sixth information comprising at least one of: position, ephemeris, moving track;

[0797] a second mapping relationship;

[0798] a second preset value;

[0799] a third mapping relationship;

[0800] The fourth information includes at least one of the following:

[0801] The second information includes at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level, and the like.

[0802] Signal characteristics associated with or determined by the second information;

[0803] The first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, terminal crystal oscillator level, and the like.

[0804] Signal characteristics associated with or determined by the first information;

[0805] Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0806] Whether it is a multi-transmission-reception point scenario;

[0807] Relationship of adjacent cells or adjacent cell groups and target cells;

[0808] Relationship between adjacent transceivers or adjacent transceiver groups and target TRPs;

[0809] The second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, and the second preset value is used to indicate one mapping relationship in the second mapping relationship.

[0810] The third mapping relationship includes one of the following:

[0811] Mapping or association relationship of synchronization signal block (SSB) to different TA compensation values and / or FO compensation values;

[0812] Mapping or association relationship of random access opportunity (RO) to different TA compensation values and / or FO compensation values;

[0813] Mapping or association relationship of round trip time (RTT) range to different TA compensation values and / or FO compensation values;

[0814] Mapping or association relationship of global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values;

[0815] Mapping or association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values.

[0816] Optionally, the determining the second compensation value comprises:

[0817] determining the second compensation value according to the eighth information;

[0818] The eighth information comprises at least one of:

[0819] The second information comprises at least one of: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level;

[0820] signal characteristics associated with or determined by the second information;

[0821] The first information comprises at least one of: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, terminal crystal oscillator level;

[0822] signal characteristics associated with or determined by the first information;

[0823] signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication;

[0824] whether it is a multi-transmission-reception point scenario;

[0825] relationship of a neighboring cell or a neighboring cell group to a target cell;

[0826] relationship between a neighboring transceiver or a neighboring transceiver group and a target TRP.

[0827] The communication apparatus provided by the embodiments of the present application can implement each process of the method embodiment of FIG. 3 and achieve the same technical effects. To avoid repetition, details are not described here.

[0828] The embodiments of the present application provide a communication apparatus. As an example, the communication apparatus can be a communication device or a component in a communication device, such as a chip. The communication device can be a terminal, a network side device, a server, etc. For example, the terminal can include but is not limited to the types of terminal 11 listed above, the network side device can include but is not limited to the types of network side device 12 listed above, and the embodiments of the present application are not limited specifically.

[0829] The communication apparatus comprises a receiving module, a sending module and a processing module. The receiving module, the sending module and the processing module can be implemented by software or hardware. When implemented by hardware, the processing module can be implemented by a processor. The processor can comprise a general-purpose processor, a special-purpose processor, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA) or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component, etc. The receiving module and the sending module can be implemented by a communication interface, which can comprise one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, etc.

[0830] Specifically, referring to FIG. 6, when the communication apparatus is a terminal or a component in the terminal, the communication apparatus 600 comprises a processing module 602 configured to determine to access a first network; and determine a first compensation value in a process of accessing the first network, and perform timing advance (TA) and / or frequency offset (FO) compensation on a first signal according to the first compensation value.

[0831] In the embodiments of the present application, the first compensation value is determined in the process of accessing the first network, and the TA and / or FO compensation is performed on the first signal according to the first compensation value, so that the additional compensation of the TA and / or FO can be realized, and the communication quality and efficiency can be improved.

[0832] Referring to FIG. 7, when the communication apparatus is a network side device or a component in the network side device, the communication apparatus 700 comprises a processing module 702 configured to perform a first operation, the first operation comprising at least one of the following: sending network type related information to a terminal; obtaining first capability information of the terminal; determining a type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or the network type related information; determining first configuration information according to the type of TA and / or FO compensation, sending the first configuration information to the terminal, the first configuration information comprising at least one of the following: the first compensation value; reference information for determining the first compensation value; a calculation method for determining the first compensation value; seventh information for determining the first compensation value; determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on a first signal according to the second compensation value.

[0833] In the embodiments of the present application, by interacting with the terminal to obtain the first capability information of the terminal, the network type related information, or determining the type of TA and / or FO compensation according to the first capability information of the terminal and / or the network type related information, and determining the first configuration information and sending the first configuration information to the terminal, the terminal can determine the first compensation value according to the supported type of TA and / or FO compensation, and additional compensation of TA and / or FO is realized, thereby improving the communication quality and efficiency, and realizing unified air interface design of ground and non-ground networks.

[0834] As shown in FIG. 8, the embodiments of the present application further provide a communication device 800, comprising a processor 801 and a memory 802, the memory 802 storing programs or instructions executable on the processor 801, for example, when the communication device 800 is a terminal, the programs or instructions are executed by the processor 801 to realize each step of the above-mentioned communication method embodiments, and the same technical effects can be achieved. When the communication device 800 is a network side device, the programs or instructions are executed by the processor 801 to realize each step of the above-mentioned communication method embodiments, and the same technical effects can be achieved, to avoid repetition, which will not be described here.

[0835] The embodiments of the present application further provide a terminal, comprising a processor and a communication interface, the communication interface and the processor are coupled, the processor is configured to run programs or instructions to realize the steps in the method embodiments as shown in FIG. 2. The terminal embodiments correspond to the above-mentioned terminal side method embodiments, each implementation process and implementation manner of the above-mentioned method embodiments can be applied to the terminal embodiments, and the same technical effects can be achieved. The terminal can be the communication apparatus shown in FIG. 4. Specifically, FIG. 9 is a hardware structure schematic diagram of a terminal for realizing the embodiments of the present application.

[0836] The terminal 900 includes, but is not limited to, at least part of components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0837] Those skilled in the art can understand that the terminal 900 can further include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 910 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than those shown, or combine certain components, or different component arrangements, which are not described here.

[0838] It should be understood that in the embodiments of the present application, the input unit 904 can include a graphics processor 9041 and a microphone 9042, and the graphics processor 9041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 can include a display panel 9061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 can include two parts of a touch detection device and a touch controller. The other input devices 9072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, which are not described here.

[0839] In the embodiments of the present application, the radio frequency unit 901 can transmit downlink data from the network side device to the processor 910 for processing after receiving the downlink data. In addition, the radio frequency unit 901 can send uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0840] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 909 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 909 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0841] The processor 910 can include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the like, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 910.

[0842] The processor 910 is configured to determine to access a first network.

[0843] The compensation unit is configured to determine a first compensation value in the process of accessing the first network, and perform timing advance (TA) and / or frequency offset (FO) compensation on a first signal according to the first compensation value.

[0844] In the embodiments of the present application, the first network is accessed, and in the process of accessing the first network, the first compensation value is determined, and the TA and / or FO compensation of the first signal is performed according to the first compensation value, so that additional compensation of the TA and / or FO can be implemented, and the communication quality and efficiency are improved.

[0845] It can be understood that the implementation processes of the implementation manners provided in the embodiments can refer to the related descriptions of the method embodiments, and achieve the same or corresponding technical effects. To avoid repetition, details are not described herein again.

[0846] The embodiments of the present application also provide a network side device, which includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiments shown in FIG. 3. The network side device embodiments correspond to the network side device method embodiments described above, and each implementation process and implementation manner of the method embodiments described above can be applied to the network side device embodiments, and the same technical effects can be achieved.

[0847] Specifically, the embodiments of the present application also provide a network side device, which can be the communication apparatus shown in FIG. 5. As shown in FIG. 10, the network side device 1000 includes an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004 and a memory 1005. The antenna 1001 is connected with the radio frequency device 1002. In the uplink direction, the radio frequency device 1002 receives information through the antenna 1001, and sends the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be sent, and sends the information to the radio frequency device 1002. The radio frequency device 1002 processes the received information and sends it out through the antenna 1001.

[0848] The method performed by the network side device in the above embodiments can be implemented in the baseband device 1003, which includes a baseband processor.

[0849] The baseband device 1003 may, for example, include at least one baseband board, and a plurality of chips are arranged on the baseband board, as shown in FIG. 10. One of the chips is, for example, a baseband processor, which is connected with the memory 1005 through a bus interface to call programs in the memory 1005 and perform the network device operations shown in the above method embodiments.

[0850] The network side device can also include a network interface 1006, which is, for example, a common public radio interface (CPRI).

[0851] Specifically, the network side device 1000 in the embodiments of the present application further includes instructions or programs stored in the storage 1005 and executable on the processor 1004, the processor 1004 invokes the instructions or programs in the storage 1005 to execute the method performed by each module shown in FIG. 5 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0852] The embodiments of the present application further provide a readable storage medium having programs or instructions stored thereon, the programs or instructions are executed by a processor to implement each process of the above communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0853] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disc or an optical disc, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0854] The embodiments of the present application further provide a chip, the chip includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions to implement each process of the above communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0855] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0856] The embodiments of the present application further provide a computer program or program product, the computer program or program product is stored in a storage medium, the computer program or program product is executed by at least one processor to implement each process of the above communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0857] The embodiments of the present application further provide a communication system, including a terminal and a network side device, the terminal can be used to execute the steps of the above communication method, and the network side device can be used to execute the steps of the above communication method.

[0858] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the methods and apparatuses of the present application can be carried out by specific hardware, by software, or by a combination of hardware and software. It is therefore, contemplated to this patent to cover any and all modifications, variations, or equivalents that fall within the scope of the present application. Accordingly, where a concept can have been illustrated in only one of the exemplary embodiments, various aspects of the concept can be modified and / or combined to produce a variety of other embodiments that are not specifically illustrated. Thus, for purposes of describing the present application, certain aspects of the application can be presented in terms of sequences of actions, but it should be appreciated that these sequences are examples and are not limiting. The sequences of actions could be changed, and other sequences could be implemented. Moreover, it should be appreciated that descriptions, if any, of any aspects of the application using words such as "can", "could", "might", or "can not" are intended to convey that such aspects are optional, and do not necessarily form part of the present application. Furthermore, it should be appreciated that the use of any of the following terms or descriptions should not be interpreted to imply any particular ordering of actions unless specifically described as such. Such terms or descriptions are used to generally describe integrations between or among various embodiments, and should not be construed to require such integrations unless such integrations are specifically described.

[0859] From the above description of the embodiments, it is apparent that the method of the embodiments can be realized by means of computer software products and necessary universal hardware platforms, of course, also by hardware. The computer software products are stored in storage media (such as ROM, RAM, magnetic disc, optical disc, etc.), and include a plurality of instructions to make the terminal or network side device execute the method described in various embodiments of the present application.

[0860] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are merely illustrative, but not restrictive. Those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims, and these embodiments all belong to the protection scope of the present application.

Claims

1. A communication method, comprising: determining, by a terminal, to access a first network; determining, by the terminal, a first compensation value for timing advance (TA) and / or frequency offset (FO) compensation of a first signal during the terminal accessing the first network.

2. The communication method according to claim 1, wherein The determining the first compensation value comprises: determining a TA and / or FO compensation type according to first capability information of the terminal, or according to the first capability information of the terminal and network type related information of the first network; determining the first compensation value according to the TA and / or FO compensation type.

3. The communication method according to claim 1, wherein, The determining the first compensation value comprises: determining a TA and / or FO compensation type; determining the first compensation value according to the TA and / or FO compensation type.

4. The communication method according to any one of claims 1-3, wherein, The determining the first compensation value comprises one of: receiving first configuration information, the first configuration information comprising at least one of: the first compensation value;reference information for determining the first compensation value;a calculation method for determining the first compensation value;seventh information for determining the first compensation value; determining the first compensation value according to the first configuration information.

5. The communication method according to claim 2 or 3, wherein, The TA and / or FO compensation type comprises one of: the terminal compensating only a first TA and / or a first FO, and the first network compensating other TA and / or FO compensation values except the first TA and / or the first FO; the terminal compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value, and the first network compensating other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value; the terminal compensating the first TA and / or the first FO, and compensating according to other TA and / or FO compensation values except the first TA and / or the first FO calculated based on one or more reference information, and the first network not compensating TA and / or FO; Wherein the first TA comprises N TA and N TA,offset , and the first FO comprises FO estimated and compensated only from reference signals.

6. The communication method according to claim 2, wherein The first capability information comprises at least one of: a compensation type or capability of the terminal, comprising one of: compensating only the first TA and / or the first FO;compensating the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value;compensating the first TA and / or the first FO, and compensating according to other TA and / or FO compensation values except the first TA and / or the first FO calculated based on one or more reference information; whether to support compensating other TA except the first TA and a TA compensation granularity; whether to support compensating other FO except the first FO and a FO compensation granularity; whether to need network compensation of TA and / or FO, comprising at least one of: network compensating other TA and / or FO compensation values except the first TA and / or the first FO, network compensating other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value compensated by the terminal, and network not compensating TA and / or FO; a network compensation type or operation expected or preferred by the terminal; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises a FO estimated and compensated only from reference signals.

7. The communication method according to claim 2 or 6, wherein, The first capability information is determined according to at least one of: The first information includes at least one of the following: height of the terminal, hardware type of the terminal, speed of the terminal, location information of the terminal, power level of the terminal, crystal oscillator level of the terminal; Signal characteristics associated with or determined by the first information; Frequency information; Whether it is a multi-carrier service scenario; Whether it is a terrestrial communication or a non-terrestrial communication; Transmission mode of the terminal; Whether to support multi-transmission and reception point transmission; Type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type of the supported signal; Whether it is backscatter communication; Whether to support dual connectivity and / or combination of dual connectivity; Whether to support frequency division full duplex, sub-band full duplex or simultaneous same frequency full duplex; Supported power level; Whether to support broadcast and / or multicast; Whether to support SFN; Whether to support multiple-input multiple-output (MIMO) transmission; Maximum number of layers of the supported MIMO transmission; Whether to support hybrid automatic repeat request transmission or disable hybrid automatic repeat request feedback; Whether to support carrier aggregation (CG) or semi-persistent scheduling (SPS) transmission; Type of the supported CG or SPS transmission; Supported measurement gap; Whether to support low-layer triggered mobility (LTM) and / or conditional handover.

8. The communication method according to claim 6 or 7, wherein, The method further includes: The terminal reports the first capability information to the first network; The reporting manner of the first capability information includes one of the following: Using at least one signal or signal parameter associated with the first capability information; Using resources of the signal associated with the first capability information, different capability types corresponding to different resources of the same signal; Reporting through high-layer signaling; Reporting through MAC layer signaling; Reporting through physical layer signaling.

9. The communication method according to claim 2, wherein, The network type related information includes one of the following: A network compensation type, including one of: compensating for a TA and / or FO compensation value other than the first TA and / or the first FO; compensating for a TA and / or FO compensation value other than the first TA and / or the first FO and a TA and / or FO fixed compensation value compensated by the terminal; not compensating for TA and / or FO; a supported compensation granularity; wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to a reference signal. Service or service or quality of service or quality of service flow identifier (QFI) or quality of service classification identifier (QCI) associated with the network compensation type; Whether to support TA compensation other than the first TA and TA compensation granularity; Whether to support FO compensation other than the first FO and FO compensation granularity; Desired or preferred compensation type; Desired or required compensation capability or type of the terminal and compensation granularity; Service or service or quality of service or QFI or QCI associated with the terminal compensation capability or type and compensation granularity; One or more preset domain values for indicating whether the terminal is required to support TA and / or FO compensation and compensation granularity, or for indicating the compensation capability or type and compensation granularity required to be possessed by the terminal.

10. The communication method according to claim 2 or 9, wherein, The network type related information is determined according to at least one of the following: Second information including at least one of the following: network height, network coverage size, speed of network transceiver unit, location information of network transceiver unit, power size of network transceiver unit, crystal oscillator level of network transceiver unit; Signal characteristics associated with or determined by the second information.

11. The communication method according to claim 10, wherein The method further includes: Obtaining the network type related information; The obtaining of the network type related information includes one of the following: receiving the network type related information, or the network compensation type and the corresponding compensation granularity, explicitly indicated by system or broadcast message or groupcast or dedicated signaling; receiving the compensation type or capability that the terminal needs to have, or the compensation type or capability that the terminal needs to have and the corresponding compensation granularity, indicated by system or broadcast message or groupcast or dedicated signaling; receiving one or more signals, resources or information corresponding to which are associated with the network type related information of the first network, or the network compensation type and the corresponding compensation granularity; obtaining information for determining the network type related information, and determining the network type related information of the first network, or the network compensation type and the corresponding compensation granularity, according to the information for determining the network type related information.

12. The communication method according to claim 3, wherein, The compensation type of the TA and / or FO includes one of the following: determining the compensation type of the TA and / or FO according to the third information; determining the compensation type of the TA and / or FO according to the first mapping relationship and the first preset value; The third information includes at least one of the following: network type related information; the compensation granularity corresponding to the network type related information; the compensation type or capability of the terminal; the compensation granularity corresponding to the compensation type or capability of the terminal; timing advance groups or synchronization signal blocks or cells or cell groups or transmission and reception points or transmission and reception point groups or satellites or satellite groups or beams or beam groups accessed or used by the terminal, and whether a change occurs; cell or transmission and reception point types indicated in system messages or broadcast messages; the relative position or distance between the terminal and the ground network; the relative position or distance between the terminal and the satellite; whether the terminal has the ability to obtain GNSS coordinates, or whether GNSS coordinates are available or reliable; whether uplink synchronization is lost, and / or the time when uplink synchronization is lost; the number of uplink transmission failures; first information, the first information including at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal position information, terminal power level, terminal crystal oscillator level; signal characteristics associated with or determined by the first information; second information, the second information including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit position information, network transceiver unit power size, network transceiver unit crystal oscillator level; signal characteristics associated with or determined by the second information; signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication; whether it is a multi-transmission and reception point scenario; the relationship between the adjacent cell or adjacent cell group and the target cell; the relationship between the adjacent transceiver unit or adjacent transceiver unit group and the target TRP; The first mapping relationship is a mapping or association relationship of one or more information in the third information to the compensation type of different TA and / or FO. The first preset value is used to indicate a mapping relationship in the first mapping relationship, and the first preset value is the first network configuration or predefined.

13. The communication method according to any one of claims 2-12, wherein, The determination of the first compensation value comprises one of the following: Receiving the first network configuration or the indicated first compensation value; Determining the first compensation value according to fourth information; Determining the first compensation value according to a second mapping relationship and a second preset value; Determining the first compensation value according to a third mapping relationship; The fourth information comprises at least one of the following: Second information, the second information comprises at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level; Signal characteristics associated with or determined by the second information; First information, the first information comprises at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, terminal crystal oscillator level; Signal characteristics associated with or determined by the first information; Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication; Whether it is a multi-transmission-reception-point scenario; Relationship of adjacent cells or adjacent cell groups and target cells; Relationship between adjacent transceivers or adjacent transceiver groups and target TRPs; Network implementation; The second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, the second preset value is used to indicate a mapping relationship in the second mapping relationship, and the second mapping relationship and the second preset value are the first network configuration or predefined. The third mapping relationship comprises one of the following: Mapping or association relationship of synchronization signal block (SSB) to different TA compensation values and / or FO compensation values; Mapping or association relationship of random access opportunity (RO) to different TA compensation values and / or FO compensation values; Mapping or association relationship of round trip time (RTT) range to different TA compensation values and / or FO compensation values; Mapping or association relationship of global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values; Mapping or association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values; The third mapping relationship is the first network configuration or predefined.

14. The communication method according to claim 13, wherein, The first compensation value is configured by the first network through downlink control information (DCI) or media access control control element (MAC CE) or radio resource control (RRC); In the case that the terminal accesses a service cell, the first compensation value is indicated by the service cell through first signaling, and the first signaling comprises random access response (RAR) or Msg4 or MsgB signaling; In a case that the terminal migrates from a serving cell to a target cell or the terminal connects multiple cells, the first compensation value is indicated by a neighbor cell, and the first compensation value is a compensation value indicated by the neighbor cell to the connected terminal, or the first compensation value is calculated by the neighbor cell based on geographical position information of the target cell and / or a state of the terminal.

15. The communication method according to any one of claims 2-12, wherein, The determining the first compensation value comprises: determining the first compensation value according to one or more reference information by using a calculation method predefined or configured by the first network; the reference information comprises at least one of: fifth information of the terminal, the fifth information comprising at least one of GNSS coordinates, speed, and moving track; sixth information of a satellite or ground device, the sixth information comprising at least one of position, ephemeris, and moving track; second information, the second information comprising at least one of network height, network coverage size, speed size of a network transceiver unit, position information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit; a signal feature associated with or determined by the second information; first information, the first information comprising at least one of terminal height, terminal hardware type, speed size of the terminal, position information of the terminal, power level of the terminal, and crystal oscillator level of the terminal; a signal feature associated with or determined by the first information; whether it is a multi-transmission-reception-point scenario; a relationship between a neighbor cell or a neighbor cell group and the target cell; a relationship between a neighbor transceiver unit or a neighbor transceiver unit group and the target TRP.

16. The communication method according to claim 15, wherein, The calculation method is used to calculate the TA and / or FO that the terminal needs to compensate, or, on the basis of the calculation method of one or more other mechanisms, to calculate the TA and / or FO increment that needs to be compensated in addition to the first TA and / or the first FO, wherein the first TA includes N TA and N TA,offset , and the first FO includes the FO that is estimated and compensated only according to the reference signal.

17. The communication method according to claim 15 or 16, wherein, the reference information or the calculation method is configured by DCI or MAC CE or RRC; in a case that the terminal accesses a serving cell, the reference information or the calculation method is indicated by the serving cell through first signaling, and the first signaling comprises one of RAR, Msg4, and MsgB; in a case that the terminal migrates from a serving cell to a target cell or the terminal connects multiple cells, the reference information or the calculation method is indicated by a neighbor cell.

18. The communication method according to any one of claims 1-17, wherein, a granularity of the TA and / or FO compensation configuration or effectiveness, comprising one of: one synchronization signal block or synchronization signal block group; one cell or cell group; one transmission-reception-point or transmission-reception-point group; one satellite or satellite group; one beam or beam group; one timing advance group; one tracking area or tracking area group; one RNA or RNA group; and / or, a granularity of the first compensation value, comprising one of: one synchronization signal block or synchronization signal block group; one cell or cell group; one transmission-reception-point or transmission-reception-point group; one satellite or satellite group; one beam or beam group; one timing advance group; one tracking area or tracking area group; one RNA or RNA group.

19. The communication method according to any one of claims 1-18, wherein, the terminal determines to access the first network, comprising one of: the terminal determines to access the first network according to first capability information; The terminal determines a first network matching the first capability information of the terminal according to the first capability information and network type related information of multiple networks, and accesses the first network.

20. The communication method according to any one of claims 1-19, wherein, The method further comprises: In the case that the terminal performs cell switching, a first condition is met, and the terminal accesses a target cell; The first condition comprises at least one of the following: The network type related information of the target cell matches the first capability information of the terminal; The terminal can obtain the geographic location information related to the target cell and / or the parameter information and calculation method required for determining TA and / or FO compensation value; In the case that the network type related information of the target cell does not match the first capability information of the terminal, there is an alternative cell assisting the terminal in TA and / or FO compensation.

21. A communication method, comprising: A network side device performs a first operation, the first operation comprising at least one of the following: Sending network type related information to a terminal; Obtaining first capability information of the terminal; Determining a type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or the network type related information; Determining first configuration information according to the type of TA and / or FO compensation, and sending the first configuration information to the terminal, the first configuration information comprising at least one of the following: a first compensation value; reference information for determining the first compensation value; a calculation method for determining the first compensation value; seventh information for determining the first compensation value; Determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on a first signal according to the second compensation value.

22. The communication method according to claim 21, wherein, The type of TA and / or FO compensation comprises one of the following: The terminal only compensates for a first TA and / or a first FO, and a first network compensates for TA and / or FO compensation values other than the first TA and / or the first FO; The terminal compensates for the first TA and / or the first FO, and compensates according to a preset or configured TA and / or FO fixed compensation value, and the first network compensates for TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation value; The terminal compensates for the first TA and / or the first FO, and compensates according to TA and / or FO compensation values other than the first TA and / or the first FO calculated based on one or more reference information, and the first network does not compensate for TA and / or FO; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises a FO estimated and compensated only from reference signals.

23. The communication method according to claim 21, wherein The first capability information comprises at least one of the following: The compensation type or capability of the terminal comprises one of the following: only compensating for the first TA and / or the first FO; compensating for the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating for the first TA and / or the first FO, and compensating according to TA and / or FO compensation values other than the first TA and / or the first FO calculated based on one or more reference information; Whether to support compensating for TA other than the first TA and the TA compensation granularity; Whether to support compensating for FO other than the first FO and the FO compensation granularity; whether the network compensates for TA and / or FO, including at least one of the following: the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO, the network compensates for TA and / or FO compensation values other than the first TA and / or the first FO and the TA and / or FO fixed compensation values compensated by the terminal, the network does not compensate for TA and / or FO; the network compensation type or operation expected or preferred by the terminal; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises a FO estimated and compensated only from reference signals.

24. The communication method according to claim 21 or 23, wherein, the first capability information of the terminal is obtained, including one of the following: receiving a second signal, wherein the second signal or parameters or resources of the second signal are associated with the first capability information; receiving high layer signaling, wherein the high layer signaling carries the first capability information of the terminal; receiving MAC layer signaling, wherein the MAC layer signaling carries the first capability information of the terminal; receiving physical layer signaling, wherein the physical layer signaling carries the first capability information of the terminal.

25. The communication method according to claim 21, wherein The network type related information includes one of the following: A network compensation type, including one of: compensating for a TA and / or FO compensation value other than the first TA and / or the first FO; compensating for a TA and / or FO compensation value other than the first TA and / or the first FO and a TA and / or FO fixed compensation value compensated by the terminal; not compensating for TA and / or FO; a supported compensation granularity; wherein the first TA includes N TA and N TA,offset , and the first FO includes FO estimated and compensated only according to a reference signal. service or service or quality of service or quality of service flow identifier QFI or quality of service classification identifier QCI associated with the network compensation type; whether to support TA compensation other than the first TA and the TA compensation granularity; whether to support FO compensation other than the first FO and the FO compensation granularity; expected or preferred compensation type; expected or required compensation capability or type and compensation granularity of the terminal; service or service or quality of service or QFI or QCI associated with the terminal compensation capability or type and compensation granularity; 1 or more preset domain values, used to indicate whether the terminal is required to support TA and / or FO compensation and compensation granularity, or, used to indicate the compensation capability or type and compensation granularity required by the terminal.

26. The communication method according to claim 21 or 25, wherein, The network type related information is determined according to at least one of the following: second information, including at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level; signal characteristics associated with or determined by the second information.

27. The communication method according to claim 21 or 25 or 26, wherein, The network type related information is sent to the terminal, including one of the following: explicitly indicating the network type related information, or the network compensation type and the corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling; indicating the compensation type or capability required by the terminal, or the compensation type or capability required by the terminal and the corresponding compensation granularity, through system or broadcast message or multicast or dedicated signaling; sending one or more third signals to the terminal, wherein the resource or information corresponding to the one or more third signals is associated with the network type related information, or the network compensation type and the corresponding compensation granularity.

28. The communication method of claim 21, wherein, The first configuration information is sent to the terminal, including one of the following: sending downlink control information DCI or media access control control element MAC CE or radio resource control RRC to the terminal, wherein the downlink control information DCI or media access control control element MAC CE or radio resource control RRC carries the first configuration information; The first configuration information is indicated by first signaling, and the first signaling includes random access response (RAR) or Msg4 or MsgB signaling. In a case where the terminal migrates from a serving cell to a target cell or the terminal is connected to multiple cells, the first configuration information is indicated by a neighbor cell.

29. The communication method of claim 21, wherein, The reference information includes at least one of the following: Fifth information of the terminal, the fifth information including at least one of GNSS coordinates, speed, and movement trajectory; Sixth information of a satellite or ground device, the sixth information including at least one of position, ephemeris, and movement trajectory; Second information, the second information including at least one of network height, network coverage size, speed size of a network transceiver unit, position information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit; Signal characteristics associated with or determined by the second information; First information, the first information including at least one of terminal height, terminal hardware type, speed size of the terminal, position information of the terminal, power level of the terminal, and crystal oscillator level of the terminal; Signal characteristics associated with or determined by the first information; Whether it is a multi-transmission-reception point scenario; Relationships between neighbor cells or neighbor cell groups and a target cell; Relationships between neighbor transceiver units or neighbor transceiver unit groups and a target TRP.

30. The communication method of claim 21, wherein, The seventh information includes at least one of the following: Fourth information; Fifth information of the terminal, the fifth information including at least one of GNSS coordinates, speed, and movement trajectory; Sixth information of a satellite or ground device, the sixth information including at least one of position, ephemeris, and movement trajectory; Second mapping relationship; Second preset value; Third mapping relationship; The fourth information includes at least one of the following: Second information, the second information including at least one of network height, network coverage size, speed size of a network transceiver unit, position information of the network transceiver unit, power size of the network transceiver unit, and crystal oscillator level of the network transceiver unit; Signal characteristics associated with or determined by the second information; First information, the first information including at least one of terminal height, terminal hardware type, speed size of the terminal, position information of the terminal, power level of the terminal, and crystal oscillator level of the terminal; Signal characteristics associated with or determined by the first information; Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication; Whether it is a multi-transmission-reception point scenario; Relationships between neighbor cells or neighbor cell groups and a target cell; Relationships between neighbor transceiver units or neighbor transceiver unit groups and a target TRP. The second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, and the second preset value is used to indicate one mapping relationship in the second mapping relationship. The third mapping relationship includes at least one of the following: Mapping or association relationship of synchronization signal block (SSB) to different TA compensation values and / or FO compensation values; Mapping or association relationship of random access opportunity (RO) to different TA compensation values and / or FO compensation values; Mapping or association relationship of round trip time (RTT) range to different TA compensation values and / or FO compensation values; Mapping or association relationship of global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values; Mapping or association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values.

31. The communication method of claim 21, wherein, The determining the second compensation value comprises: According to the eighth information, the second compensation value is determined. The eighth information comprises at least one of the following: Second information, the second information comprises at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level; Signal characteristics associated with or determined by the second information; First information, the first information comprises at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, terminal crystal oscillator level; Signal characteristics associated with or determined by the first information; Signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication; Whether it is a multi-transmission-reception-point scenario; Relationship of a neighboring cell or a neighboring cell group with a target cell; Relationship between a neighboring transceiver or a neighboring transceiver group and a target TRP. 32.A communication apparatus applied to a terminal, comprising: A first determining unit configured to determine to access a first network; A compensation unit configured to determine a first compensation value in the process of accessing the first network, and perform timing advance (TA) and / or frequency offset (FO) compensation on a first signal according to the first compensation value.

33. The communication apparatus according to claim 32, wherein, The determining the first compensation value comprises: According to first capability information of the terminal, or according to the first capability information of the terminal and network type related information of the first network, a compensation type of TA and / or FO is determined; According to the compensation type of TA and / or FO, the first compensation value is determined.

34. The communication apparatus according to claim 32, wherein, The determining the first compensation value comprises: A compensation type of TA and / or FO is determined; According to the compensation type of TA and / or FO, the first compensation value is determined.

35. The communication apparatus according to any of claims 32-34, wherein, The determining the first compensation value comprises one of the following: Receiving first configuration information, the first configuration information comprises at least one of the following: the first compensation value; reference information used to determine the first compensation value; a calculation method used to determine the first compensation value; seventh information used to determine the first compensation value; According to the first configuration information, the first compensation value is determined.

36. The communication apparatus according to claim 33 or 34, wherein, The compensation type of TA and / or FO comprises one of the following: The terminal only compensates for a first TA and / or a first FO, and the first network compensates for TA and / or FO compensation values other than the first TA and / or the first FO. The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO and a TA and / or FO fixed compensation value according to a preset or configuration, and the first network compensates for other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value compensated by the terminal; The terminal compensates for the first TA and / or the first FO, and compensates for other TA and / or FO compensation values except the first TA and / or the first FO calculated according to one or more reference information, and the first network does not compensate for TA and / or FO; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises a FO estimated and compensated only from reference signals.

37. The communication device of claim 33, wherein, The first capability information includes at least one of the following: The compensation type or capability of the terminal, including one of the following: only compensating for the first TA and / or the first FO; compensating for the first TA and / or the first FO, and compensating according to a preset or configured TA and / or FO fixed compensation value; compensating for the first TA and / or the first FO, and compensating for other TA and / or FO compensation values except the first TA and / or the first FO calculated according to one or more reference information; Whether to support compensating for other TA except the first TA and the TA compensation granularity; Whether to support compensating for other FO except the first FO and the FO compensation granularity; Whether the network needs to compensate for TA and / or FO, including at least one of the following: the network compensates for other TA and / or FO compensation values except the first TA and / or the first FO, the network compensates for other TA and / or FO compensation values except the first TA and / or the first FO and the TA and / or FO fixed compensation value compensated by the terminal, and the network does not compensate for TA and / or FO; The network compensation type or operation expected or preferred by the terminal; wherein the first TA comprises N TA and N TA,offset , and the first FO comprises a FO estimated and compensated only from reference signals.

38. The communication apparatus according to claim 33 or 37, wherein, The first capability information is determined according to at least one of the following: The first information, including at least one of the following: the height of the terminal, the hardware type of the terminal, the speed of the terminal, the location information of the terminal, the power level of the terminal, the crystal oscillator level of the terminal; The signal characteristics associated with or determined by the first information; Frequency information; Whether it is a multi-carrier service scenario; Is it a terrestrial communication or a non-terrestrial communication; The transmission mode of the terminal; Whether to support multi-transmission-reception-point transmission; The type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type of the supported signal; Whether it is backscatter communication; Whether to support dual connectivity and / or combination of dual connectivity; Whether to support frequency division full duplex, sub-band full duplex or simultaneous same frequency full duplex; Supported power level; Whether to support broadcast and / or multicast; Whether to support SFN; Whether to support multiple-input multiple-output (MIMO) transmission; The maximum number of layers of the supported MIMO transmission; Whether to support hybrid automatic repeat request transmission or disable hybrid automatic repeat request feedback; Whether to support carrier aggregation (CG) or semi-persistent scheduling (SPS) transmission; The type of supported CG or SPS transmission; Supported measurement gap; Whether to support low-layer-triggered mobility (LTM) and / or conditional handover.

39. The communication apparatus of claim 33, wherein, The network type related information includes one of the following: A network compensation type, including one of: compensating for a TA and / or FO compensation value other than the first TA and / or the first FO; compensating for a TA and / or FO compensation value other than the first TA and / or the first FO and a TA and / or FO fixed compensation value compensated by the terminal; not compensating for TA and / or FO; a supported compensation granularity; wherein the first TA includes N TA and N TA,offset , and the first FO includes a FO compensated only according to reference signal estimation. a service or a service type or a quality of service or a quality of service flow identifier (QFI) or a quality of service class identifier (QCI) associated with the compensation type; whether to support TA compensation other than the first TA and a TA compensation granularity; whether to support FO compensation other than the first FO and a FO compensation granularity; a desired or preferred compensation type; a desired or required compensation capability or type and a compensation granularity of the terminal; a service or a service type or a quality of service or a QFI or a QCI associated with the compensation capability or type and the compensation granularity of the terminal; one or more preset field values for indicating whether the terminal is required to support TA and / or FO compensation and a compensation granularity, or for indicating a compensation capability or type and a compensation granularity required to be possessed by the terminal.

40. The communication device of claim 34, wherein, The determination of the compensation type of the TA and / or the FO includes one of the following: determining the compensation type of the TA and / or the FO according to the third information; determining the compensation type of the TA and / or the FO according to the first mapping relationship and the first preset value. The third information includes at least one of the following: network type related information; a compensation granularity corresponding to the network type related information; a compensation type or capability of the terminal; a compensation granularity corresponding to the compensation type or capability of the terminal; a timing advance group or a synchronization signal block or a cell or a cell group or a transmission and reception point or a transmission and reception point group or a satellite or a satellite group or a beam or a beam group accessed or used by the terminal and whether a change occurs; a cell or a transmission and reception point type indicated in a system message or a broadcast message; a relative position or distance between the terminal and a ground network; a relative position or distance between the terminal and a satellite; whether the terminal has the capability of obtaining GNSS coordinates, or whether GNSS coordinates are available or reliable; whether uplink synchronization is lost and / or a time of losing uplink synchronization; a number of uplink transmission failures; first information, the first information including at least one of the following: a terminal height, a terminal hardware type, a terminal speed size, terminal position information, a terminal power level, a terminal crystal oscillator level; a signal feature associated with or determined by the first information; second information, the second information including at least one of the following: a network height, a network coverage size, a network transceiver unit speed size, a network transceiver unit position information, a network transceiver unit power size, a network transceiver unit crystal oscillator level; a signal feature associated with or determined by the second information; a signal type and / or a waveform and / or a subcarrier spacing and / or a modulation order and / or a resource mapping type and / or whether it is a backscatter communication; whether it is a multi-transmission and reception point scenario; a relationship between a neighboring cell or a neighboring cell group and a target cell; a relationship between a neighboring transceiver unit or a neighboring transceiver unit group and a target TRP; The first mapping relationship is a mapping or association relationship of one or more information in the third information to different TA and / or FO compensation types. The first preset value is used to indicate one mapping relationship in the first mapping relationship, and the first preset value is the first network configuration or a predefined value.

41. The communication apparatus according to any of claims 33-40, wherein, The determination of the first compensation value includes one of the following: receiving the first network configuration or the first compensation value indicated by the first network configuration; determining the first compensation value according to fourth information; determining the first compensation value according to a second mapping relationship and a second preset value; determining the first compensation value according to a third mapping relationship; the fourth information includes at least one of the following: second information, the second information includes at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level; signal characteristics associated with or determined by the second information; first information, the first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, terminal crystal oscillator level; signal characteristics associated with or determined by the first information; signal type and / or waveform and / or subcarrier spacing and / or modulation order and / or resource mapping type and / or whether it is backscatter communication; whether it is a multi-transmission-reception-point scenario; relationship between adjacent cells or adjacent cell groups and target cells; relationship between adjacent transceivers or adjacent transceiver groups and target TRPs; network implementation; the second mapping relationship is a mapping or association relationship of one or more information in the fourth information to different TA compensation values and / or FO compensation values, and the second preset value is used to indicate one mapping relationship in the second mapping relationship, and the second mapping relationship and the second preset value are the first network configuration or predefined; the third mapping relationship includes one of the following: mapping or association relationship of synchronization signal block (SSB) to different TA compensation values and / or FO compensation values; mapping or association relationship of random access opportunity (RO) to different TA compensation values and / or FO compensation values; mapping or association relationship of round trip time (RTT) range to different TA compensation values and / or FO compensation values; mapping or association relationship of global navigation satellite system (GNSS) coordinate range to different TA compensation values and / or FO compensation values; mapping or association relationship of a region or a group of beams corresponding to a preset inner-outer diameter range to different TA compensation values and / or FO compensation values; the third mapping relationship is the first network configuration or predefined.

42. The communication apparatus according to any of claims 33-40, wherein, the determination of the first compensation value includes: determining the first compensation value according to one or more reference information by using a predefined or first network configuration calculation method; the reference information includes at least one of the following: fifth information of the terminal, the fifth information includes at least one of the following: GNSS coordinates, speed, moving track; sixth information of satellite or ground equipment, the sixth information includes at least one of the following: position, ephemeris, moving track; second information, the second information includes at least one of the following: network height, network coverage size, network transceiver unit speed size, network transceiver unit location information, network transceiver unit power size, network transceiver unit crystal oscillator level; signal characteristics associated with or determined by the second information; The first information includes at least one of the following: terminal height, terminal hardware type, terminal speed size, terminal location information, terminal power level, and terminal crystal oscillator level. Signal characteristics associated with or determined by the first information. Whether it is a multi-transmission-reception-point scenario. Relationship between the neighboring cell or neighboring cell group and the target cell. Relationship between the neighboring transceiver unit or neighboring transceiver unit group and the target TRP.

43. The communication apparatus according to any of claims 32-42, wherein, Further comprising a first processing unit configured to, in the case of a cell handover of the terminal, satisfy a first condition, and the terminal accesses a target cell. The first condition includes at least one of the following: The network type related information of the target cell matches the first capability information of the terminal. The terminal can obtain the geographic location information related to the target cell and / or the parameter information and calculation method required to determine the TA and / or FO compensation value. In the case where the network type related information of the target cell does not match the first capability information of the terminal, there is an alternative cell to assist the terminal in TA and / or FO compensation.

44. A communication device applied to a network side equipment, comprising: A first execution unit configured to execute a first operation, the first operation including at least one of the following: Sending network type related information to a terminal; Obtaining first capability information of the terminal; Determining the type of timing advance (TA) and / or frequency offset (FO) compensation according to the first capability information of the terminal and / or network type related information; Determining first configuration information according to the type of TA and / or FO compensation, sending the first configuration information to the terminal, the first configuration information including at least one of the following: first compensation value; reference information for determining the first compensation value; calculation method for determining the first compensation value; seventh information for determining the first compensation value; Determining a second compensation value according to the type of TA and / or FO compensation, and performing TA and / or FO compensation on a first signal according to the second compensation value.

45. A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions being executed by the processor to implement the steps of the communication method according to any one of claims 1 to 20.

46. A network side equipment comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions being executed by the processor to implement the steps of the communication method according to any one of claims 21 to 31.

47. A readable storage medium, the readable storage medium storing programs or instructions, the programs or instructions being executed by a processor to implement the communication method according to any one of claims 1 to 20, or to implement the steps of the communication method according to any one of claims 21 to 31.

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