Signal processing, synchronization, channel estimation method and device, base station, terminal

Abstract

The present application discloses a signal processing, synchronization, channel estimation method, device, base station, terminal and storage medium. The synchronization method of the first terminal includes: not expecting to receive a downlink signal within a first time period after the last transmitted uplink OFDM symbol; performing radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or, performing radio frequency adjustment or radio frequency conversion within a first time period after the last transmitted uplink OFDM symbol.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202010842255.8 and application date August 20, 2020, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of communications, and in particular to a signal processing method, a synchronization method, a channel estimation method and device, a base station, a terminal, and a storage medium. Background Art

[0004] For the scenario where two time division duplexing (TDD) systems use the same frequency or adjacent frequencies, when the downlink time slot of the interfering station is not synchronized with the uplink time slot of the interfered station, cross-slot interference will occur. At this time, the interfered station cannot perform the fast Fourier transform (FFT) from the time domain to the frequency domain, resulting in the inability to guarantee the channel estimation accuracy of the interfered station, which in turn affects the performance of signal reconstruction and demodulation. Summary of the invention

[0005] To solve related technical problems, the embodiments of the present application provide a synchronization method, a channel estimation method, a signal processing method and device, a base station, a terminal, and a storage medium.

[0006] The embodiment of the present application provides a signal processing method, which is applied to a first terminal, including:

[0007] Not expecting to receive a downlink signal within a first duration after the last transmitted uplink first orthogonal frequency division multiplexing (OFDM) symbol;

[0008] Performing radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or,

[0009] The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

[0010] In one embodiment, the performing of radio frequency adjustment or radio frequency conversion in at least one last OFDM symbol of the transmission period includes:

[0011] Switching from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of an uplink time slot;

[0012] and / or,

[0013] The radio frequency transmission state is switched to the radio frequency reception state within at least one last OFDM symbol of the transmission period.

[0014] In one embodiment, the method further comprises at least one of the following:

[0015] According to a pre-agreed agreement or a base station instruction, a timing advance (TA) offset value is determined to be 0;

[0016] According to the instruction of the base station, confirm that the uplink and downlink switching period from the transmitter ON period to the transmitter OFF period is greater than the first switching delay;

[0017] Confirming that at least one last OFDM symbol of the transmission period is not scheduled for uplink transmission;

[0018] According to the instruction of the base station, confirm that at least one last OFDM symbol of the transmission period is not used for uplink transmission;

[0019] According to the instruction of the base station, confirm that the last at least one OFDM symbol of the transmission period is used for radio frequency adjustment or radio frequency conversion.

[0020] The embodiment of the present application further provides a synchronization method, which is applied to a second terminal, including:

[0021] Receiving first information sent by a first base station;

[0022] According to the first information, uplink and downlink conversion of the radio frequency channel is performed on the last at least one OFDM symbol of the uplink time slot.

[0023] In one embodiment, the first information is used to indicate one of the following:

[0024] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0025] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0026] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0027] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0028] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0029] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0030] In one embodiment, the method further comprises:

[0031] Receive second information sent by the first base station; the second information is used to indicate TA to the second terminal; the value of TA is less than 0.

[0032] Uplink data is sent according to the TA indicated by the second information.

[0033] In one embodiment, the second information includes a timing advance command (TAC, Timing Advance Command).

[0034] In one embodiment, the TA is determined based on a first delay and a CP length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0035] The embodiment of the present application further provides a synchronization method, which is applied to a first base station, including:

[0036] Sending first information to the second terminal; wherein,

[0037] The first information is used to enable the second terminal to perform uplink and downlink conversion of a radio frequency channel on at least one last OFDM symbol of an uplink time slot.

[0038] In one embodiment, the first information is used to indicate one of the following:

[0039] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0040] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0041] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0042] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0043] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0044] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0045] In one embodiment, the method further comprises:

[0046] Sending second information to the second terminal; wherein,

[0047] The second information is used to indicate a TA to the second terminal; the value of the TA is less than 0.

[0048] In one embodiment, the second information includes TAC.

[0049] In one embodiment, the TA is determined based on a first delay and a cyclic prefix (CP) length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0050] In one embodiment, the method further comprises:

[0051] The first time delay is determined by one of the following:

[0052] Acquire the first time delay by measuring a first reference signal of the second base station in a guard period (GP) time slot;

[0053] Determine the first delay by using first working parameter information of the first base station and second working parameter information of the second base station;

[0054] Determine the first delay by a transmission distance between the first base station and the second base station;

[0055] The first time delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0056] In one embodiment, in determining the first delay by obtaining a second reference signal of the second base station at a set resource position, the method further includes:

[0057] and exchanging third information with the second base station; wherein:

[0058] The third information represents a set resource location for transmitting the second reference signal.

[0059] In one embodiment, the second reference signal includes at least one of the following:

[0060] Synchronization Signal and PBCH block (SSB);

[0061] Channel sounding reference signal (SRS, Sounding Reference Signal);

[0062] Channel State Information Reference Signal (CSI-RS)

[0063] The embodiment of the present application further provides a synchronization method, which is applied to a third terminal, and the method includes:

[0064] receiving fourth information sent by a third base station; the fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0;

[0065] Uplink data is sent according to the TA indicated by the fourth information.

[0066] In one embodiment, the fourth information includes TAC.

[0067] In one embodiment, the TA is determined based on the following parameters:

[0068] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0069] a CP length of the second base station;

[0070] The symbol length of a single OFDM symbol;

[0071] Set the reserved time for uplink and downlink switching of the RF channel.

[0072] The embodiment of the present application further provides a synchronization method, which is applied to a third base station, including:

[0073] Sending fourth information to the third terminal; wherein,

[0074] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0075] In one embodiment, the fourth information includes TAC.

[0076] In one embodiment, the TA is determined based on the following parameters:

[0077] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0078] a CP length of the second base station;

[0079] The symbol length of a single OFDM symbol;

[0080] Set the reserved time for uplink and downlink switching of the RF channel.

[0081] In one embodiment, the method further comprises:

[0082] The second delay is determined by one of the following:

[0083] Acquire the second time delay by measuring the first reference signal of the second base station in the GP time slot;

[0084] Determine the second delay by using the third working parameter information of the third base station and the second working parameter information of the second base station;

[0085] Determine the second delay by a transmission distance between the third base station and the second base station;

[0086] The second delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0087] In one embodiment, in determining the second delay by obtaining a second reference signal of the second base station at a set resource position, the method further includes:

[0088] and exchanging third information with the second base station; wherein:

[0089] The third information represents a set resource location for transmitting the second reference signal.

[0090] In one embodiment, the second reference signal includes at least one of the following:

[0091] SSB;

[0092] SRS;

[0093] CSI-RS.

[0094] The embodiment of the present application further provides a channel estimation method, which is applied to a fourth base station, including:

[0095] Channel estimation is performed on the GP timeslot of the fourth base station.

[0096] The present application also provides a signal processing device, including:

[0097] A first processing unit, configured to not expect to receive a downlink signal within a first time duration after a last transmitted uplink OFDM symbol;

[0098] A second processing unit is configured to perform radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or,

[0099] The third processing unit is used to perform radio frequency adjustment or radio frequency conversion within a first time duration after the last transmitted uplink OFDM symbol.

[0100] The embodiment of the present application also provides a synchronization device, including:

[0101] A first receiving unit, configured to receive first information sent by a first base station;

[0102] A conversion unit is used to perform uplink and downlink conversion of a radio frequency channel on at least one last OFDM symbol of an uplink time slot according to the first information.

[0103] The embodiment of the present application also provides a synchronization device, including:

[0104] The first sending unit is used to send first information to the second terminal; wherein,

[0105] The first information is used to enable the second terminal to perform uplink and downlink conversion of a radio frequency channel on the last at least one first OFDM symbol of an uplink time slot.

[0106] The embodiment of the present application also provides a synchronization device, including:

[0107] A second receiving unit, configured to receive fourth information sent by the third base station; the fourth information is used to indicate TA to the third terminal; the value of TA is greater than 0;

[0108] The second sending unit is used to send uplink data according to the TA indicated by the fourth information.

[0109] The embodiment of the present application also provides a synchronization device, including:

[0110] The third sending unit is used to send fourth information to the third terminal; wherein,

[0111] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0112] The present application also provides a channel estimation device, including:

[0113] The channel estimation unit is used to perform channel estimation on the GP time slot of the fourth base station.

[0114] The embodiment of the present application also provides a first terminal, including a first processor and a first communication interface; wherein,

[0115] The first processor is configured to not expect to receive a downlink signal within a first time duration after a last transmitted uplink OFDM symbol;

[0116] Performing radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or,

[0117] The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

[0118] The embodiment of the present application further provides a second terminal, including: a second processor and a second communication interface; wherein,

[0119] The second communication interface is used to receive first information sent by the first base station;

[0120] The second processor is configured to perform uplink and downlink conversion of a radio frequency channel on at least one last OFDM symbol of an uplink time slot according to the first information.

[0121] The embodiment of the present application further provides a first base station, comprising: a third processor and a third communication interface; wherein,

[0122] The third communication interface is used to send the first information to the first terminal; wherein,

[0123] The first information is used to enable the first terminal to perform uplink and downlink conversion of a radio frequency channel on the last at least one first OFDM symbol of an uplink time slot.

[0124] The embodiment of the present application further provides a third terminal, including: a fourth processor and a fourth communication interface; wherein,

[0125] The fourth communication interface is used to receive fourth information sent by the third base station; and send uplink data according to the TA indicated by the fourth information; wherein,

[0126] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0127] The embodiment of the present application further provides a third base station, including: a fifth processor and a fifth communication interface; wherein,

[0128] The fifth communication interface is used to send fourth information to the third terminal; wherein,

[0129] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0130] The embodiment of the present application further provides a fourth base station, including: a sixth processor and a sixth communication interface;

[0131] in,

[0132] The sixth processor is used to perform channel estimation on the GP time slot of the fourth base station.

[0133] The embodiment of the present application further provides a first terminal, comprising: a first processor and a first memory for storing a computer program that can be run on the processor,

[0134] Wherein, the first processor is used to execute the steps of any of the above-mentioned signal processing methods when running the computer program.

[0135] The embodiment of the present application further provides a second terminal, including: a second processor and a second memory for storing a computer program that can be run on the processor,

[0136] Wherein, the second processor is used to execute the steps of any synchronization method on the second terminal side when running the computer program.

[0137] The embodiment of the present application further provides a first base station, comprising: a third processor and a third memory for storing a computer program that can be run on the processor,

[0138] Wherein, the third processor is used to execute the steps of any synchronization method on the first base station side when running the computer program.

[0139] The embodiment of the present application further provides a third terminal, including: a fourth processor and a fourth memory for storing a computer program that can be run on the processor,

[0140] The fourth processor is configured to execute any step of the third terminal side synchronization method when running the computer program.

[0141] The embodiment of the present application further provides a third base station, including: a fifth processor and a fifth memory for storing a computer program that can be run on the processor,

[0142] The fifth processor is configured to execute any step of the third base station side synchronization method when running the computer program.

[0143] The embodiment of the present application further provides a fourth base station, including: a sixth processor and a sixth memory for storing a computer program that can be run on the processor,

[0144] Wherein, the sixth processor is used to execute the steps of the above-mentioned channel estimation method when running the computer program.

[0145] An embodiment of the present application also provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the steps of any of the above-mentioned signal processing methods; or, implements the steps of any of the above-mentioned synchronization methods on the second terminal side; or, implements the steps of any of the above-mentioned synchronization methods on the first base station side; or, implements the steps of any of the above-mentioned synchronization methods on the third terminal side; or, implements the steps of any of the above-mentioned synchronization methods on the third base station side; or, implements the steps of the above-mentioned channel estimation method.

[0146] The signal processing method, synchronization method, channel estimation method and device, base station, terminal, and storage medium provided in the embodiments of the present application are as follows: the first terminal performs uplink and downlink conversion of the radio frequency channel on the last at least one first OFDM symbol of the uplink time slot; or, the first base station as the interfered station sends the first information to the second terminal, and the second terminal performs uplink and downlink conversion of the radio frequency channel on the last at least one first OFDM symbol of the uplink time slot according to the first information. Alternatively, the third base station as the interfered station sends the fourth information to the third terminal, and the fourth information is used to indicate TA to the third terminal and the value of TA is greater than 0. Alternatively, the fourth base station as the interfered station performs channel estimation on the GP time slot. Based on the scheme provided in the embodiments of the present application, more accurate channel estimation can be achieved, on this basis, the interference signal can be reconstructed and the useful signal can be demodulated, thereby suppressing cross-slot interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0147] Figure 1 A schematic diagram of cross-slot interference in related technologies;

[0148] Figure 2 A schematic diagram of the difference in sending and receiving time due to cross-time slot interference in the related technology;

[0149] Figure 3 This is a flowchart of the information processing method according to an embodiment of the present application;

[0150] Figure 4 This is a flowchart of the synchronization method according to an embodiment of the present application;

[0151] Figure 5 This is a flowchart of a synchronization method according to another embodiment of the present application;

[0152] Figure 6 This is a flowchart of a synchronization method according to another embodiment of the present application;

[0153] Figure 7 This is a flowchart of a synchronization method according to another embodiment of the present application;

[0154] Figure 8 This is a schematic diagram of the flow of the channel estimation method according to an embodiment of the present application;

[0155] Fig. 9 This is an example diagram of a channel estimation method according to an embodiment of the present application;

[0156] Fig.10 Example diagram of synchronization method in application embodiment of the present application;

[0157] Fig.11 An example diagram of a synchronization method according to another application embodiment of the present application;

[0158] Fig.12 This is a schematic diagram of the structure of an information processing device according to an embodiment of the present application;

[0159] Fig.13 This is a schematic diagram of the structure of a synchronization device according to an embodiment of the present application;

[0160] Fig.14 This is a schematic diagram of the structure of a synchronization device according to another embodiment of the present application;

[0161] Fig.15 This is a schematic diagram of the structure of a synchronization device according to another embodiment of the present application;

[0162] Fig.16 This is a schematic diagram of the structure of a synchronization device according to another embodiment of the present application;

[0163] Fig.17 This is a schematic diagram of the structure of the channel estimation device of this application;

[0164] Fig.18 This is a schematic diagram of the first terminal structure of an embodiment of the present application;

[0165] Fig.19 This is a schematic diagram of the second terminal structure of the embodiment of the present application;

[0166] Fig. 20 This is a schematic diagram of the structure of the first base station in an embodiment of the present application;

[0167] Fig.21 This is a schematic diagram of the third terminal structure of the embodiment of the present application;

[0168] Fig. 22 This is a schematic diagram of the structure of the second base station in the embodiment of the present application;

[0169] Fig.23This is a schematic diagram of the structure of the fourth base station in an embodiment of the present application. DETAILED DESCRIPTION

[0170] For the scenario where two TDD systems are deployed at the same frequency in the same frequency band, if the uplink time slots of the two TDD systems are not synchronized with the downlink time slots, cross-slot interference will be introduced; for the scenario where two TDD systems are deployed in close proximity to each other in the same frequency band, since the RF filter is a passband for both TDD systems and has no suppression, cross-slot interference will also be introduced. In other words, when two TDD systems use the same frequency or close proximity to each other, cross-slot interference will occur if the uplink time slot of one TDD system is not synchronized with the downlink time slot of the other TDD system. Figure 1 As shown in the figure, the corresponding position indicated by the arrow has interference from the downlink time slot to the uplink time slot. When cross-time slot interference occurs, the baseband cancellation scheme is one of the interference cancellation schemes. However, if the time transmission and reception of the interfering station and the interfered station are not synchronized, the interfered base station (hereinafter referred to as the interfered station) cannot accurately perform the FFT transformation from the time domain to the frequency domain, resulting in the channel estimation accuracy of the interfered station cannot be guaranteed, which in turn affects the subsequent signal reconstruction and demodulation of the baseband cancellation scheme. Figure 2 As shown, in the scenario of macro-micro base station networking, the macro base station as the interfering station adopts 7D3U. Due to the cross-slot interference, the micro base station as the interfered station has a difference in sending and receiving time. The difference in sending and receiving time includes: the reserved time for the uplink and downlink conversion of the RF channels of the base station and the terminal required by the protocol, that is, the switching delay of the RF channel on / off, and the air interface transmission time of the downlink transmission of the macro base station as the interfering station to the uplink reception of the micro base station. The difference in sending and receiving time is far beyond the cyclic prefix (CP) length range allowed by the interfering station.

[0171] Based on this, the synchronization method, channel estimation method, device, base station, terminal and storage medium provided in the embodiments of the present application, as the first base station of the disturbed station, sends the first information to the first terminal, and the first terminal performs the uplink and downlink conversion of the radio frequency channel on the last at least one first OFDM symbol of the uplink time slot according to the first information. Alternatively, as the third base station of the disturbed station, the fourth information is sent to the second terminal, and the fourth information is used to indicate TA to the second terminal and the value of TA is greater than 0. Alternatively, as the fourth base station of the disturbed station, the channel is estimated on the GP time slot. Based on the scheme provided in the embodiments of the present application, more accurate channel estimation can be achieved, on this basis, the interference signal can be reconstructed and the useful signal can be demodulated, thereby suppressing cross-slot interference.

[0172] The present application embodiment provides a signal processing method, which is applied to a first terminal, such as Figure 3 As shown, the method includes at least one of the following steps:

[0173] Step 301: not expecting to receive a downlink signal within a first time duration after the last transmitted uplink OFDM symbol;

[0174] Performing radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or,

[0175] The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

[0176] Here, after the last transmitted uplink OFDM symbol refers to after the end time of the last transmitted uplink OFDM symbol, that is, after the ending boundary of OFDM.

[0177] The first duration is a set constant, or a constant configured by a high level.

[0178] In one embodiment, the first duration = 26500Tc (13us), where Tc is a time unit. c =1 / (Δf max ·N f ), where Δf max =480·10 3 Hz,N f =4096.

[0179] It should be noted that the “adjustment” in the radio frequency adjustment is described as “retuning” in the 3GPP protocol, and the “conversion” in the radio frequency conversion is described as “switching” in the 3GPP protocol.

[0180] In one embodiment, performing radio frequency adjustment or radio frequency conversion in at least one last OFDM symbol of a transmission period includes:

[0181] Switching from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of an uplink time slot;

[0182] and / or,

[0183] The radio frequency transmission state is switched to the radio frequency reception state within at least one last OFDM symbol of the transmission period.

[0184] In one embodiment, Figure 3 The behavior in the embodiments is based on confirming at least one of:

[0185] According to a pre-agreed agreement or a base station instruction, the TA offset value is determined to be 0;

[0186] According to the instruction of the base station, confirm that the uplink and downlink switching period from the transmitter ON period to the transmitter OFF period is greater than the first switching delay;

[0187] Confirming that at least one last OFDM symbol of the transmission period is not scheduled for uplink transmission;

[0188] According to the instruction of the base station, confirm that at least one last OFDM symbol of the transmission period is not used for uplink transmission;

[0189] According to the instruction of the base station, confirm that the last at least one OFDM symbol of the transmission period is used for radio frequency adjustment or radio frequency conversion.

[0190] Among them, TA offset N TA_offset = 0. In actual applications, the UE receives the high-level signaling n-TimingAdvanceOffset and confirms N according to the value of n-TimingAdvanceOffset. TA_offset =0. In one embodiment, the value range of TimingAdvanceOffset is an enumeration variable of ENUMERATED{n0,n25600,n39936}. Therefore, when the value of TimingAdvanceOffset is n0, N TA_offset =0.

[0191] It should be noted that the transmission period is an uplink-downlink conversion period. In the above embodiment, the uplink-downlink conversion period is also recorded as dl-UL-TransmissionPeriodicity.

[0192] The embodiment of the present application also provides a synchronization method, which is applied to a first base station, such as Figure 4 As shown, the method includes:

[0193] Step 401: Send first information to a second terminal.

[0194] The first information is used to enable the second terminal to perform uplink and downlink conversion of a radio frequency channel on the last at least one first OFDM symbol of an uplink time slot.

[0195] Here, the first base station adopts a symbol-level scheduling method, retains the GI function on the last one or more OFDM symbols of the uplink time slot of the second terminal, that is, does not schedule uplink data, and sends the first information to the second terminal to indicate the starting position and duration of the last one or more OFDM symbols to the second terminal, so that the second terminal performs uplink and downlink conversion of the radio frequency channel on the last one or more OFDM symbols, that is, the second terminal does not send uplink data on the last one or more OFDM symbols. In practical applications, the first information indicates that the transmission transit period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period can occupy the last one or more OFDM symbols originally configured as uplink resources in the uplink-downlink conversion period (dl-UL-TransmissionPeriodicity).

[0196] In actual applications, the first base station may indicate to the second terminal, through explicit indication or implicit indication, to perform uplink and downlink conversion of the radio frequency channel on the corresponding OFDM symbol.

[0197] Based on this, in one embodiment, the first information is used to indicate one of the following:

[0198] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0199] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0200] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0201] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0202] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0203] Among them, the explicit indication method includes: the uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period can occupy the last at least one first OFDM symbol originally configured as the uplink resource in the dl-UL-TransmissionPeriodicity. Here, the first base station directly instructs the second terminal to perform an action on at least one first OFDM symbol of the uplink time slot, so that the second terminal does not send uplink data on the at least one OFDM symbol, and the RF switch of the second terminal realizes the switching from uplink to downlink within the time of the at least one OFDM symbol. In addition to the above-mentioned explicit indication method, the contents of the remaining first information indications all correspond to implicit indication methods. For example, the first base station indicates to the second terminal through signaling or configuration information that the last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be scheduled; or, indicates to the second terminal that the last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception; or, the last at least one OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity but not scheduled; or, indicates to the second terminal at least one OFDM symbol configured for uplink signal or uplink channel transmission. After parsing the above indication content in the second information, the second terminal will reserve time on the last one or more OFDM symbols of the corresponding uplink time slot to perform uplink and downlink conversion of the radio frequency channel.

[0204] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0205] In actual application, in order to avoid cross-time slot interference of the interfering station on the interfered station, the first base station instructs the second terminal to perform uplink and downlink conversion of the radio frequency channel on at least one last first OFDM symbol of the uplink, and can also indicate the delay time for sending uplink data to the second terminal, and adjust the time for the second terminal to send uplink data, so as to ensure that the time when the downlink data of the interfering station arrives at the first base station is consistent with the time when the uplink data of the second terminal arrives at the first base station.

[0206] Based on this, in one embodiment, the method further includes:

[0207] Sending second information to the second terminal.

[0208] Wherein, the second information is used to indicate TA to the second terminal; the value of TA is less than 0.

[0209] Here, when the time for the second terminal to send uplink data is delayed, the TA indicated by the first base station to the second terminal is negative.

[0210] In one embodiment, the second information includes TAC.

[0211] That is to say, the first base station indicates TA to the second terminal through TAC.

[0212] In one embodiment, the TA is determined based on a first time delay and the CP length of a second base station; the first time delay represents the downlink transmission time delay from the second base station to the first base station.

[0213] Wherein, the value of the CP length of the second base station does not exceed the allowable CP length range of the second base station.

[0214] In practical applications, for the case of delaying the time for the terminal to send uplink data, within the TAC indication range, it is required that the deployment distance between the disturbed station and the disturbing station << 1.75 km, where TA = -(the first time delay + the allowable length range of CP), and the value of TA obtained in this way << the maximum adjustment value supported by the TAC indication (-8.15 us).

[0215] When implementing the solution of the embodiment of the present application, it is necessary to determine the first time delay, that is, the downlink transmission time delay from the second base station to the first base station.

[0216] Based on this, in one embodiment, the method further includes:

[0217] Determine the first time delay through one of the following:

[0218] Obtain the first time delay by measuring a first reference signal of the second base station within the GP time slot;

[0219] Determine the first time delay through the first working parameter information of the first base station and the second working parameter information of the second base station;

[0220] Determine the first time delay through the transmission distance between the first base station and the second base station;

[0221] Determine the first time delay through a second reference signal of the second base station obtained at a set resource position.

[0222] Wherein, the first reference signal includes at least one of the following:

[0223] SRS;

[0224] Demodulation Reference Signal (DMRS)

[0225] The second reference signal includes at least one of the following:

[0226] SSB;

[0227] SRS;

[0228] CSI-RS.

[0229] In one embodiment, in determining the first delay by obtaining a second reference signal of the second base station at a set resource position, the method further includes:

[0230] and exchanging third information with the second base station; wherein:

[0231] The third information represents a set resource location for transmitting the second reference signal.

[0232] Here, the first base station as the interfered station needs to obtain the second reference signal from which resource position, therefore, the first base station exchanges third information with the second base station as the interfering station in advance to obtain the resource position for transmitting the second reference signal.

[0233] Correspondingly, the embodiment of the present application also provides a synchronization method, which is applied to the second terminal, such as Figure 5 As shown, the method includes:

[0234] Step 501: Receive first information sent by a first base station.

[0235] Step 502: According to the first information, uplink and downlink conversion of a radio frequency channel is performed on at least one last OFDM symbol of an uplink time slot.

[0236] Here, the time for the second terminal to send uplink data is delayed, and the first base station adopts a symbol-level scheduling method to retain the GI function on the last one or more OFDM symbols of the second terminal's uplink time slot, that is, no uplink data is scheduled, and the second information is sent to the second terminal to indicate the starting position and duration of the last one or more OFDM symbols to the second terminal, so that the second terminal performs uplink and downlink conversion of the radio frequency channel on the last one or more OFDM symbols, that is, the second terminal does not send uplink data on the last one or more OFDM symbols. In actual applications, the first information indicates that the transmission period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period can occupy the last one or more OFDM symbols originally configured as uplink resources in the uplink and downlink conversion period.

[0237] In actual applications, the first base station may indicate to the second terminal, through explicit indication or implicit indication, to perform uplink and downlink conversion of the radio frequency channel on the corresponding OFDM symbol.

[0238] Based on this, in one embodiment, the first information is used to indicate one of the following:

[0239] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0240] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0241] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0242] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0243] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0244] Among them, the explicit indication method includes: the uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period can occupy the last at least one first OFDM symbol originally configured as the uplink resource in the dl-UL-TransmissionPeriodicity. Here, the first base station directly instructs the second terminal to perform an action on at least one first OFDM symbol of the uplink time slot, so that the second terminal does not send uplink data on the at least one OFDM symbol, and the RF switch of the second terminal realizes the switching from uplink to downlink within the time of the at least one OFDM symbol. In addition to the above-mentioned explicit indication method, the contents of the remaining first information indications all correspond to implicit indication methods. For example, the first base station indicates to the second terminal through signaling or configuration information that the last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be scheduled; or, indicates to the second terminal that the last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception; or, the last at least one OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity but not scheduled; or, indicates to the second terminal at least one OFDM symbol configured for uplink signal or uplink channel transmission. After parsing the above indication content in the second information, the second terminal will reserve time on the last one or more OFDM symbols of the corresponding uplink time slot to perform uplink and downlink conversion of the radio frequency channel.

[0245] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0246] In actual application, in order to avoid cross-time slot interference of the interfering station on the interfered station, the first base station instructs the second terminal to perform uplink and downlink conversion of the radio frequency channel on at least one last first OFDM symbol of the uplink, and can also indicate the delay time for sending uplink data to the second terminal, and adjust the time for the second terminal to send uplink data, so as to ensure that the time when the downlink data of the interfering station arrives at the first base station is consistent with the time when the uplink data of the second terminal arrives at the first base station.

[0247] Based on this, in one embodiment, the method further includes:

[0248] receiving second information sent by the first base station; wherein,

[0249] The second information is used to indicate the TA to the second terminal; the value of the TA is less than 0.

[0250] Here, when delaying the time for the second terminal to send uplink data, the TA indicated by the first base station to the second terminal is negative.

[0251] In one embodiment, the second information includes TAC.

[0252] That is to say, the first base station indicates the TA to the second terminal through the TAC.

[0253] In one embodiment, the TA is determined based on a first time delay and the CP length of a second base station; the first time delay represents the downlink transmission time delay from the second base station to the first base station.

[0254] Among them, the value of the CP length of the second base station does not exceed the CP length range allowed by the second base station.

[0255] In practical applications, for the situation of delaying the time for the terminal to send uplink data, within the TAC indication range, it is required that the deployment distance between the disturbed station and the interfering station << 1.75 km, where TA = -(the first time delay + the allowable length range of the CP), and the value of the obtained TA << the maximum adjustment value supported by the TAC indication (-8.15 us).

[0256] The embodiment of the present application provides a synchronization method, which is applied to a third base station, as Figure 6 shown, the method includes:

[0257] Step 601: Send fourth information to a third terminal.

[0258] Among them, the fourth information is used to indicate the TA to the third terminal; the value of the TA is greater than 0.

[0259] Here, in order to avoid cross-slot interference of the interfering station to the disturbed station, the time for the third terminal to send uplink data is advanced. The third base station indicates the advance time for the third terminal to send uplink data, and adjusts the time for the third terminal to send uplink data, so as to ensure that the moment when the downlink data of the interfering station arrives at the third base station is the same as the moment when the uplink data of the third terminal arrives at the third base station. When advancing the time for the third terminal to send uplink data, the TA indicated by the third base station to the third terminal is positive.

[0260] In one embodiment, the fourth information includes TAC.

[0261] That is to say, the third base station indicates the TA to the third terminal through the TAC.

[0262] In one embodiment, the TA is determined based on the following parameters:

[0263] The second time delay; the second time delay characterizes the downlink transmission time delay from the second base station to the third base station;

[0264] The CP length of the second base station;

[0265] The symbol length of a single OFDM symbol;

[0266] The reserved time for the uplink and downlink conversion of the set radio frequency channel.

[0267] In practical applications, for the case of advancing the time for the terminal to send uplink data, within the TAC indication range, it is required that the deployment distance between the disturbed station and the disturbing station << 300 km, and the value of TA << the maximum adjustment value supported by the TAC indication (1001.6 us). Among them, TA = the symbol length of a single OFDM symbol + the CP length of the second base station - the reserved time for the uplink and downlink conversion of the set radio frequency channel - the second time delay, and it is required that the second time delay << the maximum adjustment value supported by the TAC (1001.6 us) - the allowable length range of the CP.

[0268] When implementing the solution of the embodiment of the present application, it is necessary to determine the second time delay, that is, the downlink transmission time delay from the second base station to the third base station.

[0269] Based on this, in one embodiment, the method further includes:

[0270] Determine the second time delay through one of the following:

[0271] Obtain the second time delay by measuring the first reference signal of the second base station within the GP time slot;

[0272] Determine the second time delay through the third working parameter information of the third base station and the second working parameter information of the second base station;

[0273] Determine the second time delay through the transmission distance between the third base station and the second base station;

[0274] Determine the second time delay through the second reference signal of the second base station obtained at the set resource position.

[0275] Among them, the first reference signal includes at least one of the following:

[0276] SRS;

[0277] DMRS.

[0278] The second reference signal includes at least one of the following:

[0279] SSB;

[0280] SRS;

[0281] CSI-RS.

[0282] In one embodiment, in determining the second delay by obtaining a second reference signal of the second base station at a set resource position, the method further includes:

[0283] and exchanging third information with the second base station; wherein:

[0284] The third information represents a set resource location for transmitting the second reference signal.

[0285] The embodiment of the present application provides a synchronization method, which is applied to a third terminal, such as Figure 7 As shown, the method includes:

[0286] Step 701: Receive fourth information sent by a third base station.

[0287] The fourth information is used to indicate TA to the second terminal; the value of TA is greater than 0.

[0288] Step 702: Send uplink data according to the TA indicated by the fourth information.

[0289] Here, in order to avoid cross-time slot interference of the disturbing station to the disturbed station, the time for the third terminal to send uplink data is advanced. The third base station indicates the advance time for sending uplink data to the third terminal, and adjusts the time for the third terminal to send uplink data, so as to ensure that the time when the downlink data of the disturbing station arrives at the third base station is consistent with the time when the uplink data of the third terminal arrives at the third base station. When the time for the third terminal to send uplink data is advanced, the TA indicated by the third base station to the third terminal is a positive value.

[0290] In one embodiment, the fourth information includes TAC.

[0291] That is, the third base station indicates the TA to the third terminal through the TAC.

[0292] In one embodiment, the TA is determined based on the following parameters:

[0293] The second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0294] a CP length of the second base station;

[0295] The symbol length of a single OFDM symbol;

[0296] Set the reserved time for uplink and downlink switching of the RF channel.

[0297] In practical applications, for the case of advancing the time for the terminal to send uplink data, within the TAC indication range, it is required that the deployment distance between the disturbed station and the interfering station is << 300 km, the value of TA is << the maximum adjustment value supported by the TAC indication (1001.6 us). Among them, TA = the symbol length of a single OFDM symbol + the CP length of the second base station - the reserved time for the up / down conversion of the set radio frequency channel - the second time delay, and it is required that the second time delay is << the maximum adjustment value supported by the TAC (1001.6 us) - the allowable length range of the CP.

[0298] The embodiment of the present application also provides a channel estimation method, which is applied to the fourth base station, as Figure 8 shown, and the method includes:

[0299] Step 801: Perform channel estimation on the GP time slot of the fourth base station.

[0300] Here, the fourth base station needs to reserve the symbol position of the GP time slot in advance to perform channel estimation on the downlink channel from the second base station to the fourth base station on the GP time slot. In this way, the fourth base station can have more sufficient time for channel estimation, ensure a more accurate channel estimation result, reconstruct the interference signal and demodulate the useful signal on this basis, thereby suppressing cross-slot interference and improving system performance and cell throughput.

[0301] Refer to Fig. 9 , when the fourth base station performs channel estimation on the GP time slot at position 1, it can effectively suppress the cross-slot interference corresponding to the subsequent U2 time slot and U3 time slot.

[0302] Next, the technical effects of the present application will be described in combination with application embodiments.

[0303] Combined with Fig.10 , in example (a), the interfering station is configured with 1 + 1 DMRS, the disturbed station is configured with 2 + 2 DMRS, the channel estimation accuracy is medium, the uplink capacity is high, and the uplink loss is 17%; in example (b), the interfering station is configured with 1 + 1 DMRS, the disturbed station is configured with 1 + 1 DMRS, the channel estimation accuracy is low, the uplink capacity is low, and the uplink loss is 7%; in example (c), the interfering station is configured with 2 + 2 DMRS, the disturbed station is configured with 2 + 2 DMRS, the channel estimation accuracy is high, the uplink capacity is high, and the uplink loss is 7 / (3 * 14)% = 17%; in example (d), the interfering station is configured with 2 + 2 DMRS, the disturbed station is configured with 1 + 1 DMRS, the channel estimation accuracy is low, the uplink capacity is high, and the uplink loss is 5 / (3 * 14)% = 12%.

[0304] Combined with Fig.11In example (a), the interfering station is configured with 2+2DMRS and the interfered station is configured with 2+2DMRS. The channel estimation accuracy is high, the uplink and downlink capacity is high, the signal reconstruction complexity is high, and the uplink loss is 17%; in example (b), the interfering station is configured with 1+1DMRS and the interfered station is configured with 2+2DMRS. The channel estimation accuracy is medium, the uplink capacity is high, the signal reconstruction complexity is high, and the uplink loss is 10% to 12%; in example (c), the interfering station is configured with 1+1DMRS and the interfered station is configured with 1+1DMRS. The channel estimation accuracy is high, the uplink and downlink capacity is low, the uplink signal reconstruction complexity is high, and the uplink loss is 10%; in example (d), the interfering station is configured with 2+2DMRS and the interfered station is configured with 1+1DMRS. The channel estimation accuracy is low, the downlink capacity is high, the reconstruction complexity is high, and the uplink loss is 10%.

[0305] Exemplarily, the solution of the embodiment of the present application is applicable to at least the following scenarios:

[0306] Scenario 1: A macro base station and a macro base station, where the downlink of a macro base station interferes with the uplink of another macro base station;

[0307] Scenario 2: Macro base station and pico base station. The downlink of the macro base station interferes with the uplink of the pico base station, or the downlink of the pico base station interferes with the uplink of the macro base station.

[0308] Scenario 3: Between pico base stations, the downlink of a pico base station interferes with the uplink of another pico base station.

[0309] It should be noted that, due to the uncertainty of the mobile position of the terminal and the low transmission power, the terminal-related interference is not considered in this solution.

[0310] In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a signal processing device, which is arranged on the first terminal, such as Fig.12 As shown, the device comprises:

[0311] The first processing unit 1201 is configured to not expect to receive a downlink signal within a first time duration after the last transmitted uplink OFDM symbol;

[0312] The second processing unit 1202 is configured to perform radio frequency adjustment or radio frequency conversion in at least one last OFDM symbol of a transmission period; and / or,

[0313] The third processing unit 1203 is configured to perform radio frequency adjustment or radio frequency conversion within a first time duration after the last transmitted uplink OFDM symbol.

[0314] In one embodiment, the second processing unit 1202 is used to:

[0315] Switching from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of an uplink time slot;

[0316] and / or,

[0317] The radio frequency transmission state is switched to the radio frequency reception state within at least one last OFDM symbol of the transmission period.

[0318] In one embodiment, the device further comprises at least one of the following:

[0319] A first confirmation unit, configured to determine that a value of a TA offset is 0 according to a pre-agreed agreement or an instruction from a base station;

[0320] A second confirmation unit, configured to confirm, according to an instruction from a base station, that an uplink / downlink switching period for switching from a transmitter ON period to a transmitter OFF period is greater than a first switching delay;

[0321] A third confirmation unit, used to confirm that the last at least one OFDM symbol of the transmission period is not scheduled for uplink transmission;

[0322] A fourth confirmation unit, configured to confirm, according to an instruction from the base station, that the last at least one OFDM symbol of the transmission period is not used for uplink transmission;

[0323] The fifth confirmation unit is used to confirm, according to the instruction of the base station, that the last at least one OFDM symbol of the transmission period is used for radio frequency adjustment or radio frequency conversion.

[0324] In actual application, the first processing unit 1201, the second processing unit 1202, the third processing unit 1203 and the first to fifth confirmation units may be implemented by a processor in a signal processing device.

[0325] It should be noted that: when the signal processing device provided in the above embodiment performs signal processing, only the division of the above program modules is used as an example. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the signal processing device provided in the above embodiment and the signal processing method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0326] In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a synchronization device, which is arranged on the first base station, such as Fig.13 As shown, the device comprises:

[0327] The first sending unit 1301 is configured to send first information to the second terminal; wherein:

[0328] The first information is used to enable the second terminal to perform uplink and downlink conversion of a radio frequency channel on the last at least one first OFDM symbol of an uplink time slot.

[0329] In one embodiment, the first information is used to indicate one of the following:

[0330] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0331] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0332] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0333] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0334] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0335] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0336] In one embodiment, the device further comprises:

[0337] The second sending unit is used to send second information to the second terminal; wherein,

[0338] The second information is used to indicate a timing advance TA to the second terminal; the value of TA is less than 0.

[0339] In one embodiment, the first information includes TAC.

[0340] In one embodiment, the TA is determined based on a first delay and a CP length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0341] In one embodiment, the device further comprises:

[0342] A first determining unit is configured to determine the first delay by one of the following methods:

[0343] Acquire the first time delay by measuring a first reference signal of the second base station in a guard interval GP time slot;

[0344] Determine the first delay by using first working parameter information of the first base station and second working parameter information of the second base station;

[0345] Determine the first delay by a transmission distance between the first base station and the second base station;

[0346] The first time delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0347] In one embodiment, the device further comprises:

[0348] A first interaction unit is configured to determine the first delay by acquiring the second reference signal of the second base station at the set resource position, and to interact with the second base station for third information; wherein,

[0349] The third information represents a set resource location for transmitting the second reference signal.

[0350] In one embodiment, the second reference signal includes at least one of the following:

[0351] SSB;

[0352] SRS;

[0353] CSI-RS.

[0354] In actual application, the first sending unit 1301 and the second sending unit, the first determining unit, and the first interaction unit can be implemented by a communication interface in the synchronization device; the determining unit can be implemented by a processor in the synchronization device in combination with a communication interface.

[0355] In order to implement the method of the embodiment of the present application, the embodiment of the present application also provides a synchronization device, which is set on the second terminal, such as Fig.14 As shown, the device comprises:

[0356] The first receiving unit 1401 is configured to receive first information sent by a first base station;

[0357] The conversion unit 1402 is configured to perform uplink and downlink conversion of a radio frequency channel on at least one last OFDM symbol of an uplink time slot according to the first information.

[0358] In one embodiment, the first information is used to indicate one of the following:

[0359] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0360] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0361] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0362] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0363] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0364] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0365] In one embodiment, the device further comprises:

[0366] A second receiving unit, configured to receive second information sent by the first base station; the second information is used to indicate a TA to the second terminal; the value of the TA is less than 0;

[0367] The fourth sending unit is used to send uplink data according to the TA indicated by the second information.

[0368] In one embodiment, the second information includes TAC.

[0369] In one embodiment, the TA is determined based on a first delay and a CP length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0370] In actual application, the first receiving unit 1401, the second receiving unit, and the fourth sending unit can be implemented by a communication interface in the synchronization device.

[0371] In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a synchronization device, which is arranged on a third base station, such as Fig.15 As shown, the device comprises:

[0372] The third sending unit 1501 is used to send fourth information to the third terminal; wherein,

[0373] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0374] In one embodiment, the fourth information includes TAC.

[0375] In one embodiment, the TA is determined based on the following parameters:

[0376] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0377] a CP length of the second base station;

[0378] The symbol length of a single OFDM symbol;

[0379] Set the reserved time for uplink and downlink switching of the RF channel.

[0380] In one embodiment, the device further comprises:

[0381] A second determining unit is configured to determine the second delay by one of the following:

[0382] Acquire the second time delay by measuring the first reference signal of the second base station in the GP time slot;

[0383] Determine the second delay by using the third working parameter information of the third base station and the second working parameter information of the second base station;

[0384] Determine the second delay by a transmission distance between the third base station and the second base station;

[0385] The second delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0386] In one embodiment, the device further comprises:

[0387] The second interaction unit is configured to determine the second delay by acquiring the second reference signal of the second base station at the set resource position, and interact with the second base station for third information; wherein,

[0388] The third information represents a set resource location for transmitting the second reference signal.

[0389] In one embodiment, the second reference signal includes at least one of the following:

[0390] SSB;

[0391] SRS;

[0392] CSI-RS.

[0393] In actual application, the third sending unit 1501 and the second interaction unit can be implemented by a communication interface in the synchronization device; the second determination unit can be implemented by a processor in the synchronization device in combination with the communication interface.

[0394] In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a synchronization device, which is arranged on a third terminal, such as Fig.16 As shown, the device comprises:

[0395] The second receiving unit 1601 is configured to receive fourth information sent by a third base station; the fourth information is used to indicate a TA to the third terminal; and the value of the TA is greater than 0;

[0396] The second sending unit 1602 is configured to send uplink data according to the TA indicated by the fourth information.

[0397] In one embodiment, the fourth information includes TAC.

[0398] In one embodiment, the TA is determined based on the following parameters:

[0399] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0400] a CP length of the second base station;

[0401] The symbol length of a single OFDM symbol;

[0402] Set the reserved time for uplink and downlink switching of the RF channel.

[0403] In actual application, the second receiving unit 1601 and the second sending unit 1602 can be implemented by a communication interface in the synchronization device.

[0404] It should be noted that: the synchronization device provided in the above embodiment only uses the division of the above program modules as an example when performing synchronization. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the synchronization device and the synchronization method embodiment provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0405] In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a channel estimation device, which is arranged on the fourth base station, such as Fig.17As shown, the device comprises:

[0406] The channel estimation unit 1701 is configured to perform channel estimation on the GP timeslot of the fourth base station.

[0407] In actual application, the channel estimation unit 1701 can be implemented by a processor in a channel estimation device in combination with a communication interface.

[0408] It should be noted that: when the channel estimation device provided in the above embodiment performs channel estimation, only the division of the above program modules is used as an example. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the above-described processing. In addition, the channel estimation device provided in the above embodiment and the channel estimation method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0409] Based on the hardware implementation of the above program module, and in order to implement the method on the first terminal side of the embodiment of the present application, the embodiment of the present application also provides a first terminal, such as Fig.18 As shown, the first terminal 1800 includes:

[0410] The first communication interface 1801 is capable of exchanging information with other network nodes;

[0411] The first processor 1802 is connected to the first communication interface 1801 to implement information exchange with other network nodes, and is used to execute the method provided by one or more technical solutions of the first terminal side when running a computer program. The computer program is stored in the first memory 1803.

[0412] Specifically, the first processor 1802 is configured to not expect to receive a downlink signal within a first duration after the last transmitted uplink OFDM symbol;

[0413] Performing radio frequency adjustment or radio frequency conversion within at least one last OFDM symbol of a transmission period; and / or,

[0414] The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

[0415] In one embodiment, the first processor 1802 performs radio frequency adjustment or radio frequency conversion in at least one last OFDM symbol of a transmission period, for:

[0416] Switching from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of an uplink time slot;

[0417] and / or,

[0418] The radio frequency transmission state is switched to the radio frequency reception state within at least one last OFDM symbol of the transmission period.

[0419] In one embodiment, according to a pre-agreed agreement or a base station instruction, it is determined that the value of the TA offset is 0;

[0420] According to the instruction of the base station, confirm that the uplink and downlink switching period required for switching from the transmitter ON period to the transmitter OFF period is greater than the first switching delay;

[0421] Confirming that at least one last OFDM symbol of the transmission period is not scheduled for uplink transmission;

[0422] According to the instruction of the base station, confirm that at least one last OFDM symbol of the transmission period is not used for uplink transmission;

[0423] According to the instruction of the base station, confirm that the last at least one OFDM symbol of the transmission period is used for radio frequency adjustment or radio frequency conversion.

[0424] It should be noted that the specific processing process of the first processor 1802 and the first communication interface 1801 can be understood by referring to the above method.

[0425] Of course, in actual application, the various components in the first terminal 1800 are coupled together through the bus system 1804. It can be understood that the bus system 1804 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 1804 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.18 Various buses are labeled as bus system 1804.

[0426] The first memory 1803 in the embodiment of the present application is used to store various types of data to support the operation of the first terminal 1800. Examples of such data include: any computer program used to operate on the first terminal 1800.

[0427] The method disclosed in the above embodiment of the present application can be applied to the first processor 1802, or implemented by the first processor 1802. The first processor 1802 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the first processor 1802. The above-mentioned first processor 1202 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The first processor 1802 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in the first memory 1803, and the first processor 1802 reads the information in the first memory 1803 and completes the steps of the above method in combination with its hardware.

[0428] In an exemplary embodiment, the first terminal 1800 can be implemented by one or more application-specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field-programmable gate array (FPGA), general-purpose processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0429] Based on the hardware implementation of the above program module, and in order to implement the method on the second terminal side of the embodiment of the present application, the embodiment of the present application also provides a second terminal, such as Fig.19 As shown, the second terminal 1900 includes:

[0430] The second communication interface 1901 is capable of exchanging information with other network nodes;

[0431] The second processor 1902 is connected to the second communication interface 1901 to implement information exchange with other network nodes, and is used to execute the method provided by one or more technical solutions of the first terminal side when running a computer program. The computer program is stored in the second memory 1903.

[0432] Specifically, the second communication interface 1901 is used to receive the first information sent by the first base station;

[0433] According to the first information, uplink and downlink conversion of the radio frequency channel is performed on the last at least one OFDM symbol of the uplink time slot.

[0434] In one embodiment, the first information is used to indicate one of the following:

[0435] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0436] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0437] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0438] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0439] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0440] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0441] In one embodiment, the second communication interface 1901 is further used for:

[0442] receiving second information sent by the first base station; the second information is used to indicate a TA to the second terminal; the value of the TA is less than 0;

[0443] Uplink data is sent according to the TA indicated by the second information.

[0444] In one embodiment, the second information includes TAC.

[0445] In one embodiment, the TA is determined based on a first delay and a CP length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0446] It should be noted that the specific processing process of the second processor 1902 and the second communication interface 1901 can be understood by referring to the above method.

[0447] Of course, in actual application, the various components in the second terminal 1900 are coupled together through the bus system 1904. It can be understood that the bus system 1904 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 1904 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.19 Various buses are labeled as bus system 1904.

[0448] The second memory 1903 in the embodiment of the present application is used to store various types of data to support the operation of the second terminal 1900. Examples of such data include: any computer program used to operate on the second terminal 1900.

[0449] The method disclosed in the above embodiment of the present application can be applied to the second processor 1902, or implemented by the second processor 1902. The second processor 1902 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the second processor 1902. The above-mentioned second processor 1902 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The second processor 1902 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in the second memory 1903. The second processor 1902 reads the information in the second memory 1903 and completes the steps of the above method in combination with its hardware.

[0450] In an exemplary embodiment, the second terminal 1900 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0451] Based on the hardware implementation of the above program module, and in order to implement the method on the first base station side of the embodiment of the present application, the embodiment of the present application also provides a first base station, such as Fig. 20 As shown, the first base station 2000 includes:

[0452] The third communication interface 2001 is capable of exchanging information with other network nodes;

[0453] The third processor 2002 is connected to the third communication interface 2001 to implement information exchange with other network nodes, and is used to execute the method provided by one or more technical solutions of the first base station side when running a computer program. The computer program is stored in the third memory 2003.

[0454] Specifically, the third communication interface 2001 is used to send the first information to the second terminal; wherein,

[0455] The first information is used to enable the second terminal to perform uplink and downlink conversion of a radio frequency channel on the last at least one first orthogonal frequency division multiplexing (OFDM) symbol of an uplink time slot.

[0456] In one embodiment, the first information is used to indicate one of the following:

[0457] The uplink-downlink conversion period required for the second terminal to switch from the transmitter ON period to the transmitter OFF period may occupy the last at least one first OFDM symbol originally configured as an uplink resource in the dl-UL-TransmissionPeriodicity;

[0458] The last at least one first OFDM symbol originally configured as uplink resources in dl-UL-TransmissionPeriodicity will not be scheduled;

[0459] The last at least one first OFDM symbol originally configured as an uplink resource in dl-UL-TransmissionPeriodicity will not be used for uplink transmission or downlink reception;

[0460] The last at least one OFDM symbol in dl-UL-TransmissionPeriodicity that was originally configured as an uplink resource but was not scheduled;

[0461] At least one OFDM symbol configured to be used for uplink signal or uplink channel transmission.

[0462] In one embodiment, the first information does not change the downlink period determined by dl-UL-TransmissionPeriodicity.

[0463] In one embodiment, the third communication interface 2001 is further used for:

[0464] Sending second information to the second terminal; wherein,

[0465] The second information is used to indicate a TA to the second terminal; the value of the TA is less than 0.

[0466] In one embodiment, the second information includes TAC.

[0467] In one embodiment, the TA is determined based on a first delay and a CP length of the second base station; the first delay represents a downlink transmission delay from the second base station to the first base station.

[0468] In one embodiment, the third processor 2002 is configured to:

[0469] The first time delay is determined by one of the following:

[0470] Acquire the first time delay by measuring a first reference signal of the second base station in a GP time slot;

[0471] Determine the first delay by using first working parameter information of the first base station and second working parameter information of the second base station;

[0472] Determine the first delay by a transmission distance between the first base station and the second base station;

[0473] The first time delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0474] In one embodiment, the third communication interface 2001 is further used to: determine the first delay by acquiring the second reference signal of the second base station at the set resource position, and exchange third information with the second base station; wherein,

[0475] The third information represents a set resource location for transmitting the second reference signal.

[0476] In one embodiment, the second reference signal includes at least one of the following:

[0477] SSB;

[0478] SRS;

[0479] CSI-RS.

[0480] It should be noted that the specific processing process of the third processor 2002 and the third communication interface 2001 can be understood by referring to the above method.

[0481] Of course, in actual application, the various components in the first base station 2000 are coupled together through the bus system 2004. It can be understood that the bus system 2004 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 2004 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Fig. 20 Various buses are labeled as bus system 2004.

[0482] The third memory 2003 in the embodiment of the present application is used to store various types of data to support the operation of the first base station 2000. Examples of such data include: any computer program used to operate on the first base station 2000.

[0483] The method disclosed in the above embodiment of the present application can be applied to the third processor 2002, or implemented by the third processor 2002. The third processor 2002 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the third processor 2002. The above-mentioned third processor 2002 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The third processor 2002 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the third memory 2003. The third processor 2002 reads the information in the third memory 2003 and completes the steps of the above method in combination with its hardware.

[0484] In an exemplary embodiment, the first base station 2000 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0485] Based on the hardware implementation of the above program module, and in order to implement the method on the third terminal side of the embodiment of the present application, the embodiment of the present application also provides a third terminal, such as Fig.21 As shown, the third terminal 2100 includes:

[0486] The fourth communication interface 2101 is capable of exchanging information with other network nodes;

[0487] The fourth processor 2102 is connected to the fourth communication interface 2101 to implement information interaction with other network nodes, and is used to execute the method provided by one or more technical solutions of the third terminal side when running the computer program. The computer program is stored in the fourth memory 2103.

[0488] Specifically, the fourth communication interface 2101 is used to receive fourth information sent by the third base station; the fourth information is used to indicate TA to the third terminal; the value of TA is greater than 0;

[0489] Uplink data is sent according to the TA indicated by the fourth information.

[0490] In one embodiment, the fourth information includes TAC.

[0491] In one embodiment, the TA is determined based on the following parameters:

[0492] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0493] a CP length of the second base station;

[0494] The symbol length of a single OFDM symbol;

[0495] Set the reserved time for uplink and downlink switching of the RF channel.

[0496] It should be noted that the specific processing process of the fourth processor 2102 and the fourth communication interface 2101 can be understood by referring to the above method.

[0497] Of course, in actual application, the various components in the third terminal 2100 are coupled together through the bus system 2104. It can be understood that the bus system 2104 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 2104 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.21 Various buses are labeled as bus system 2104.

[0498] The fourth memory 2103 in the embodiment of the present application is used to store various types of data to support the operation of the third terminal 2100. Examples of such data include: any computer program used to operate on the first terminal 2100.

[0499] The method disclosed in the above embodiment of the present application can be applied to the fourth processor 2102, or implemented by the fourth processor 2102. The fourth processor 2102 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the fourth processor 2102 or an instruction in the form of software. The above-mentioned fourth processor 2102 may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The fourth processor 2102 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in the fourth memory 2103, and the fourth processor 2102 reads the information in the fourth memory 2103 and completes the steps of the above method in combination with its hardware.

[0500] In an exemplary embodiment, the third terminal 2100 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0501] Based on the hardware implementation of the above program module, and in order to implement the method on the third base station side of the embodiment of the present application, the embodiment of the present application also provides a third base station, such as Fig. 22 As shown, the third base station 2200 includes:

[0502] A fifth communication interface 2201, capable of exchanging information with other network nodes;

[0503] The fifth processor 2202 is connected to the fifth communication interface 2201 to implement information interaction with other network nodes, and is used to execute the method provided by one or more technical solutions of the fourth base station side when running a computer program. The computer program is stored in the fifth memory 2203.

[0504] Specifically, the fifth communication interface 2201 is used to send fourth information to the third terminal; wherein,

[0505] The fourth information is used to indicate a TA to the third terminal; the value of the TA is greater than 0.

[0506] In one embodiment, the fourth information includes TAC.

[0507] In one embodiment, the TA is determined based on the following parameters:

[0508] Second delay; the second delay represents the downlink transmission delay from the second base station to the third base station;

[0509] a CP length of the second base station;

[0510] The symbol length of a single OFDM symbol;

[0511] Set the reserved time for uplink and downlink switching of the RF channel.

[0512] In one embodiment, the fifth processor 2202 is configured to:

[0513] The second delay is determined by one of the following:

[0514] Acquire the second time delay by measuring the first reference signal of the second base station in the GP time slot;

[0515] Determine the second delay by using the third working parameter information of the third base station and the second working parameter information of the second base station;

[0516] Determine the second delay by a transmission distance between the third base station and the second base station;

[0517] The second delay is determined by obtaining a second reference signal of the second base station at a set resource location.

[0518] In one embodiment, the fifth communication interface 2201 is further used for:

[0519] In determining the second delay by obtaining the second reference signal of the second base station at the set resource position, the method further includes:

[0520] and exchanging third information with the second base station; wherein:

[0521] The third information represents a set resource location for transmitting the second reference signal.

[0522] In one embodiment, the second reference signal includes at least one of the following:

[0523] SSB;

[0524] SRS;

[0525] CSI-RS.

[0526] It should be noted that the specific processing process of the fifth processor 2202 and the fifth communication interface 2201 can be understood by referring to the above method.

[0527] Of course, in actual application, the various components in the third base station 2200 are coupled together through the bus system 2204. It can be understood that the bus system 2204 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 2204 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig. 22 Various buses are labeled as bus system 2204.

[0528] The fifth memory 2203 in the embodiment of the present application is used to store various types of data to support the operation of the third base station 2200. Examples of such data include: any computer program used to operate on the third base station 2200.

[0529] The method disclosed in the above embodiment of the present application can be applied to the fifth processor 2202, or implemented by the fifth processor 2202. The fifth processor 2202 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of the hardware in the fifth processor 2202 or an instruction in the form of software. The fifth processor 2202 mentioned above can be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The fifth processor 2202 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the fifth memory 2203, and the fifth processor 2202 reads the information in the fifth memory 2203 and completes the steps of the above method in combination with its hardware.

[0530] In an exemplary embodiment, the third base station 2200 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0531] Based on the hardware implementation of the above program modules, and in order to implement the method on the fourth base station side of the embodiment of the present application, the embodiment of the present application also provides a fourth base station, such as Fig.23 As shown, the fourth base station 2300 includes:

[0532] The sixth communication interface 2301 is capable of exchanging information with other network nodes;

[0533] The sixth processor 2302 is connected to the sixth communication interface 2301 to implement information interaction with other network nodes, and is used to execute the method provided by one or more technical solutions of the fourth base station side when running a computer program. The computer program is stored in the sixth memory 2303.

[0534] Specifically, the sixth processor 2302 is configured to perform channel estimation on the GP timeslot of the fourth base station.

[0535] It should be noted that the specific processing process of the sixth processor 2302 can be understood by referring to the above method.

[0536] Of course, in actual application, the various components in the fourth base station 2300 are coupled together through the bus system 2304. It can be understood that the bus system 2304 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 2304 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig.23 Various buses are labeled as bus system 2304.

[0537] The sixth memory 2303 in the embodiment of the present application is used to store various types of data to support the operation of the fourth base station 2300. Examples of such data include: any computer program used to operate on the fourth base station 2300.

[0538] The method disclosed in the above embodiment of the present application can be applied to the sixth processor 2302, or implemented by the sixth processor 2302. The sixth processor 2302 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the sixth processor 2302. The above-mentioned sixth processor 2302 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The sixth processor 2302 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in the sixth memory 2303, and the sixth processor 2302 reads the information in the sixth memory 2303 and completes the steps of the above method in combination with its hardware.

[0539] In an exemplary embodiment, the fourth base station 2300 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0540] It can be understood that the memory (first memory 1803, second memory 1903, third memory 2003, fourth memory 2103, fifth memory 2203, sixth memory 2303) of the embodiment of the present application can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. Volatile memory can be random access memory (RAM), which acts as external cache.By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), direct memory bus random access memory (DRRAM). The memory described in the embodiments of the present application is intended to include but is not limited to these and any other suitable types of memory.

[0541] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, that is, a computer storage medium, specifically a computer-readable storage medium, for example, including a first memory 1803 storing a computer program, and the computer program can be executed by the first processor 1802 of the first terminal 1800 to complete the steps of the first terminal side method. For example, a second memory 1903 storing a computer program is included, and the computer program can be executed by the second processor 1902 of the second terminal 1900 to complete the steps of the second terminal side method. For example, a third memory 2003 storing a computer program is included, and the computer program can be executed by the third processor 2002 of the second base station 2000 to complete the steps of the second base station side method. For example, a fourth memory 2103 storing a computer program is included, and the computer program can be executed by the fourth processor 2102 of the third terminal 2100 to complete the steps of the third terminal side method. For example, a fifth memory 2203 storing a computer program is included, and the computer program can be executed by the fifth processor 2202 of the third base station 2200 to complete the steps of the third base station side method. For another example, a sixth memory 2303 storing a computer program may be executed by a sixth processor 2302 of the fourth base station 2300 to complete the steps of the fourth base station side method. The computer readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM.

[0542] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0543] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0544] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A signal processing method, characterized in that: Applied to the first terminal, comprising: Not expecting to receive a downlink signal within a first duration after the last transmitted uplink first orthogonal frequency division multiplexing OFDM symbol; Switching from the RF transmission state to the RF reception state within at least one last OFDM symbol of the uplink time slot; and / or, Switching from the RF transmission state to the RF reception state within at least one last OFDM symbol of the transmission period; and / or, The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

2. The method according to claim 1, characterized in that The method further comprises at least one of the following: According to a pre-agreed agreement or a base station instruction, it is determined that the value of the timing advance TA offset is 0; According to the instruction of the base station, confirm that the uplink and downlink switching period from the transmitter ON period to the transmitter OFF period is greater than the first switching delay; Confirming that at least one last OFDM symbol of the transmission period is not scheduled for uplink transmission; According to the instruction of the base station, confirm that at least one last OFDM symbol of the transmission period is not used for uplink transmission; According to the instruction of the base station, confirm that the last at least one OFDM symbol of the transmission period is used for radio frequency adjustment or radio frequency conversion.

3. A signal processing device, characterized in that: include: A first processing unit, configured to not expect to receive a downlink signal within a first time duration after a last transmitted uplink OFDM symbol; A second processing unit, configured to switch from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of an uplink time slot; and / or, switching from a radio frequency transmission state to a radio frequency reception state within at least one last OFDM symbol of a transmission period; and / or, The third processing unit is used to perform radio frequency adjustment or radio frequency conversion within a first time duration after the last transmitted uplink OFDM symbol.

4. A first terminal, characterized in that: It includes a first processor and a first communication interface; wherein, The first processor is configured to not expect to receive a downlink signal within a first time duration after a last transmitted uplink OFDM symbol; Switching from the RF transmission state to the RF reception state within at least one last OFDM symbol of the uplink time slot; and / or, Switching from the RF transmission state to the RF reception state within at least one last OFDM symbol of the transmission period; and / or, The radio frequency adjustment or radio frequency conversion is performed within the first time duration after the last transmitted uplink OFDM symbol.

5. A first terminal, characterized in that: include: a first processor and a first memory for storing a computer program executable on the processor, Wherein, when the first processor is used to run the computer program, it executes the steps of the signal processing method according to any one of claims 1 to 2.

6. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the signal processing method according to any one of claims 1 to 2 are implemented.

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