Method, device, terminal and base station for TA synchronization in random access process

Abstract

The present invention provides a method, device, terminal and base station for timing advance TA synchronization during a random access process. The method comprises: sending a first message to the terminal during the random access process of the terminal; wherein the first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero and a negative value. The TA synchronization method of the present invention defines the TA delay amount in the random access phase, which can be one of a positive value, zero and a negative value, so that the air interface downlink transmission time from the interfering station to the interfered station is equal to the air interface uplink transmission time from the terminal to the interfered station, so as to ensure that the downlink time slot of the interfering station and the uplink time slot of the interfered station are adjusted in time synchronization, and avoid the problem that the interfered station cannot perform FFT transformation from time domain to frequency domain, which affects signal reconstruction and demodulation.

Description

Technical Field

[0001] The present invention relates to the field of wireless technology, and in particular to a method, device, terminal and base station for timing advance (TA) synchronization in a random access process. Background Art

[0002] When two Time Division Duplexing (TDD) systems use the same or adjacent frequencies, cross-slot interference occurs if the time slots are not synchronized.

[0003] When cross-slot interference occurs between macro and macro, macro and pico, pico and pico, or pico and macro stations, the downlink of one TDD system can interfere with the uplink of another TDD system, as well as conventional co-frequency / adjacent frequency co-slot interference. Baseband cancellation can support the suppression of this cross-slot interference. The victim station reconstructs the interference signal and demodulates the desired signal based on the channel estimation results of the interfering station and the acquisition of source data. The interfering and victim stations are connected using a shared indoor baseband unit (BBU).

[0004] However, due to the time asynchrony between the downlink time slot of the interfering station (macro) and the uplink time slot of the interfered station (micro), the above interference suppression method does not take into account the time asynchrony between base stations, resulting in the interfered station being unable to perform FFT transformation from time domain to frequency domain, and the channel estimation accuracy cannot be guaranteed, which in turn affects the signal reconstruction and demodulation performance. Summary of the Invention

[0005] The technical solution of the present invention aims to provide a method, device, terminal and base station for timing advance TA synchronization during a random access process, which is used to solve the problem in the prior art that the downlink time slot of the interfering station and the uplink time slot of the interfered station are time-asynchronous, resulting in the interfered station being unable to perform FFT transformation from time domain to frequency domain, affecting signal reconstruction and demodulation.

[0006] An embodiment of the present invention provides a method for synchronizing a timing advance (TA) in a random access process, which is applied to a first base station. The method includes:

[0007] During a random access process of a terminal, sending a first message to the terminal;

[0008] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0009] Optionally, in the TA synchronization method, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0010] Optionally, the TA synchronization method further includes:

[0011] Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard time slot GP symbol; or

[0012] Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

[0013] Optionally, in the TA synchronization method, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0014] The timing delay initial information includes multiple initial values.

[0015] Optionally, in the TA synchronization method, the timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal;

[0016] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0017] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0018] Optionally, the TA synchronization method further includes:

[0019] Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount;

[0020] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0021] Optionally, in the TA synchronization method, the first message is a random access response message or a system broadcast message.

[0022] An embodiment of the present invention further provides a method for synchronizing a timing advance (TA) during a random access process, which is applied to a terminal. The method includes:

[0023] During a random access process of a terminal, receiving a first message sent by a first base station;

[0024] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0025] Uplink data is sent according to the TA delay amount.

[0026] Optionally, in the TA synchronization method, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0027] Optionally, in the TA synchronization method, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0028] The timing delay initial information includes multiple initial values.

[0029] Optionally, in the TA synchronization method, the timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal;

[0030] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0031] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0032] Optionally, the TA synchronization method further includes:

[0033] Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal;

[0034] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0035] Optionally, in the TA synchronization method, the first message is a random access response message or a system broadcast message.

[0036] An embodiment of the present invention further provides a base station, which is a first base station and includes a transceiver, wherein the transceiver is configured to:

[0037] During a random access process of a terminal, sending a first message to the terminal;

[0038] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0039] An embodiment of the present invention further provides a terminal, including a transceiver, wherein the transceiver is configured to:

[0040] During a random access process of a terminal, receiving a first message sent by a first base station;

[0041] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0042] Uplink data is sent according to the TA delay amount.

[0043] An embodiment of the present invention further provides a device for timing advance TA synchronization in a random access process, which is applied to a first base station, wherein the device includes:

[0044] A message sending module, configured to send a first message to a terminal during a random access process of the terminal;

[0045] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0046] An embodiment of the present invention further provides a device for TA synchronization during a random access process, which is applied to a terminal, wherein the device includes:

[0047] A message receiving module, configured to receive a first message sent by a first base station during a random access process of a terminal;

[0048] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0049] The data sending module is used to send uplink data according to the TA delay amount.

[0050] An embodiment of the present invention also provides a network device, characterized in that it includes: a processor, a memory, and a program stored on the memory and runnable on the processor, wherein when the program is executed by the processor, the method for timing advance TA synchronization of the random access process as described in any one of the above items is implemented.

[0051] An embodiment of the present invention further provides a readable storage medium, wherein a program is stored on the readable storage medium, and when the program is executed by a processor, the steps in the method for timing advance TA synchronization of a random access process as described in any one of the above items are implemented.

[0052] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0053] The TA synchronization method described in the embodiment of the present invention defines the TA delay amount in the random access phase, which can be one of a positive value, zero, and a negative value, so that the air interface downlink transmission time from the interfering station to the interfered station is equal to the air interface uplink transmission time from the terminal to the interfered station, so as to ensure that the downlink time slot of the interfering station and the uplink time slot of the interfered station are adjusted in time synchronization, thereby avoiding the problem that the interfered station cannot perform FFT transformation from the time domain to the frequency domain, affecting signal reconstruction and demodulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 1 is a flow chart of a TA synchronization method according to one embodiment of the present invention;

[0055] Figure 2 and Figure 3 A schematic diagram illustrating the principle of asynchrony between the time slots of uplink and downlink data transmission between the interfering station and the interfered station;

[0056] Figure 4 Schematic diagram of a flow chart of a TA synchronization method according to another embodiment of the present invention;

[0057] Figure 5 This is a schematic structural diagram of a base station according to one embodiment of the present invention;

[0058] Figure 6 This is a schematic structural diagram of a terminal according to one embodiment of the present invention;

[0059] Figure 7 This is a structural diagram of a TA synchronization device according to one embodiment of the present invention;

[0060] Figure 8 This is a structural diagram of a TA synchronization device according to another embodiment of the present invention;

[0061] Figure 9 This is a schematic structural diagram of a base station according to another embodiment of the present invention;

[0062] Figure 10 It is a structural diagram of a terminal according to another embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0064] To address the problem in the prior art that the downlink time slot of an interfering station and the uplink time slot of a victim station are time-asynchronous, resulting in the victim station being unable to perform FFT transformation from the time domain to the frequency domain, thereby affecting signal reconstruction and demodulation, an embodiment of the present invention provides a method for synchronizing timing advance (TA) in a random access process. By defining the TA delay amount in the random access phase, which can be one of a positive value, zero, and a negative value, the method ensures that the downlink time slot of the interfering station and the uplink time slot of the victim station are adjusted in time synchronization, completes the channel estimation and signal reconstruction process of the interfering station, and avoids the problem that the victim station is unable to perform FFT transformation from the time domain to the frequency domain, thereby affecting signal reconstruction and demodulation.

[0065] One embodiment of the present invention provides a method for synchronizing a timing advance TA during a random access process, which is applied to a first base station, such as Figure 1 Shown, including:

[0066] S110, sending a first message to the terminal during a random access process of the terminal;

[0067] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0068] In the embodiment of the present invention, the first base station may be a victim station during data transmission, wherein the TA delay is used to represent a time offset of an air interface position of downlink synchronization of the terminal relative to the victim station.

[0069] See Figure 2 and Figure 3 As shown, there is a time slot asynchrony problem in the uplink and downlink data transmission between the interfering station and the interfered station. For example, the interfering station uses the 7D3U time slot format and the interfered station uses the 1D3U time slot format for data transmission. The existing random access phase timing advance (TD) can only be a positive value, and does not take into account the asynchrony between base stations. As a result, the interfered station cannot perform the FFT transform from the time domain to the frequency domain. To address this problem, the TA synchronization method described in the embodiment of the present invention can define the TA delay as one of a positive value, zero, and a negative value, so that the air interface downlink transmission time from the interfering station to the interfered station is equal to the air interface uplink transmission time from the terminal to the interfered station, thereby achieving the purpose of synchronous adjustment of the transmission and reception time between the interfering station and the interfered station.

[0070] According to the above, in an embodiment of the present invention, optionally, the TA delay amount is determined according to a reserved time length for uplink and downlink radio frequency channel switching and a downlink air interface transmission delay from the second base station to the first base station.

[0071] The second base station is an interfering station of the first base station.

[0072] Using the TA synchronization method described in the embodiment of the present invention, for the first base station, that is, on the interfered side, a symbol-level scheduling method is adopted, and uplink data is not scheduled on the last orthogonal frequency division multiplexing (OFDM) symbol of the uplink time slot.

[0073] Optionally, the TA delay is equal to the sum of the uplink and downlink radio frequency channel switching reserved time and the downlink air interface transmission delay from the second base station to the first base station.

[0074] Specifically, the reserved duration for uplink and downlink radio frequency channel switching is predefined according to the protocol, and the reserved duration requires the terminal to consider this time and send uplink service data in advance.

[0075] On the other hand, optionally, the method further comprises:

[0076] Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard period (GP) symbol; or

[0077] Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

[0078] In the embodiment of the present invention, optionally, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0079] The timing delay initial information includes multiple initial values.

[0080] Optionally, the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0081] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0082] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0083] Optionally, the first type of terminal may be a terminal using a version lower than R16, and the corresponding first timing delay initial information includes multiple positive initial values, such as a set of multiple initial values ​​(0, 1, 2, ..., 3846), which may be a set of TA initial values ​​predefined by a general protocol.

[0084] Optionally, the second type of terminal may be a terminal using R17 or above version, and the corresponding multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values. In one embodiment, optionally, compared with the commonly predefined TA initial value, the second timing delay initial information may be a redefined TA initial value, such as a set of multiple initial values ​​of (-3846,…0,1,2,...,3846); in another embodiment, optionally, the second timing delay initial information may include a set of commonly predefined TA initial values, such as (0,1,2,...,3846), and may also include a set of redefined multiple initial values, such as (-3846,...,-2,-1,0).

[0085] The TA synchronization method according to the embodiment of the present invention may optionally further include:

[0086] Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount;

[0087] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0088] Specifically, the PRACH resources may be divided into a first group of resources and a second group of resources that do not overlap, and the timing delay initial information used to determine the TA delay amount may be indicated according to the association relationship between different groups of resources and different types of terminals.

[0089] In this way, based on the PRACH resources allocated to the terminal and the association between the first group of resources corresponding to the first type of terminal and the second group of resources corresponding to the second type of terminal, the terminal can determine the timing delay initial information used for the TA delay amount indicated by the base station.

[0090] In the embodiment of the present invention, optionally, in step S110, the first message sent by the terminal may be a random access response message or a system broadcast message.

[0091] That is, the base station may send the TA delay amount through a random access response message or a system broadcast message.

[0092] Optionally, the base station may send the TA delay amount through message 2 of the random access response message.

[0093] By adopting the TA synchronization method described in the embodiment of the present invention, by estimating the TA delay between the interfering station and the interfered station, defining the TA delay between the interfered station and the terminal, and indicating the TA delay to the terminal, the problem of asynchrony in the inter-station reception and transmission time involved in the baseband cancellation scheme can be solved, and the interference problem between macro stations and macro stations, macro stations and pico stations, and pico stations and pico stations can be further reduced, so as to improve the system performance and cell throughput.

[0094] The embodiment of the present invention also provides a method for TA synchronization during random access process timing advance, which is applied to a terminal, such as Figure 4 As shown, the method includes:

[0095] S410, receiving a first message sent by a first base station during a random access process of a terminal;

[0096] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0097] S420: Send uplink data according to the TA delay amount.

[0098] By adopting the TA synchronization method described in the embodiment of the present invention, by defining the TA delay amount in the random access phase, which can be one of a positive value, zero, and a negative value, the air interface downlink transmission time from the interfering station to the interfered station is equal to the air interface uplink transmission time from the terminal to the interfered station, so as to ensure that the downlink time slot of the interfering station and the uplink time slot of the interfered station are adjusted in time synchronization, thereby avoiding the problem that the interfered station cannot perform FFT transformation from the time domain to the frequency domain, affecting signal reconstruction and demodulation.

[0099] Optionally, in the TA synchronization method, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0100] Optionally, in the TA synchronization method, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0101] The timing delay initial information includes multiple initial values.

[0102] Optionally, in the TA synchronization method, the timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal;

[0103] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0104] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0105] Optionally, the TA synchronization method further includes:

[0106] Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal;

[0107] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0108] Optionally, in the TA synchronization method, the first message is a random access response message or a system broadcast message.

[0109] The embodiment of the present invention further provides a base station, which is a first base station. Figure 5 As shown, it includes a transceiver 510, wherein the transceiver 510 is used to:

[0110] During a random access process of a terminal, sending a first message to the terminal;

[0111] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0112] Optionally, in the base station, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0113] Optionally, in the base station, the transceiver 510 is further configured to:

[0114] Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard time slot GP symbol; or

[0115] Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

[0116] Optionally, the base station, wherein the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0117] The timing delay initial information includes multiple initial values.

[0118] Optionally, the base station, wherein the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0119] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0120] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0121] Optionally, in the base station, the transceiver 510 is further configured to:

[0122] Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount;

[0123] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0124] Optionally, in the base station, the first message is a random access response message or a system broadcast message.

[0125] The embodiment of the present invention further provides a terminal, such as Figure 6 As shown, the transceiver 610 is included, wherein the transceiver 610 is used to:

[0126] During a random access process of a terminal, receiving a first message sent by a first base station;

[0127] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0128] Uplink data is sent according to the TA delay amount.

[0129] Optionally, in the terminal, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0130] Optionally, the terminal, wherein the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0131] The timing delay initial information includes multiple initial values.

[0132] Optionally, the terminal, wherein the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0133] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0134] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0135] Optionally, in the terminal, the transceiver 610 is further configured to:

[0136] Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal;

[0137] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0138] Optionally, in the terminal, the first message is a random access response message or a system broadcast message.

[0139] The embodiment of the present invention further provides a device for TA synchronization during random access, which is applied to a first base station, such as Figure 7 As shown, the device includes:

[0140] A message sending module 710 is configured to send a first message to a terminal during a random access process of the terminal;

[0141] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0142] Optionally, in the TA synchronization device, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0143] Optionally, in the TA synchronization device, the message sending module 710 is further configured to:

[0144] Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard time slot GP symbol; or

[0145] Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

[0146] Optionally, in the TA synchronization device, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0147] The timing delay initial information includes multiple initial values.

[0148] Optionally, in the TA synchronization device, the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0149] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0150] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0151] Optionally, in the TA synchronization device, the message sending module 710 is further configured to:

[0152] Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount;

[0153] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0154] Optionally, in the TA synchronization device, the first message is a random access response message or a system broadcast message.

[0155] The embodiment of the present invention also provides a device for TA synchronization during random access, which is applied to a terminal, such as Figure 8 As shown, the device includes:

[0156] The message receiving module 810 is configured to receive a first message sent by a first base station during a random access process of a terminal;

[0157] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0158] The data sending module 820 is configured to send uplink data according to the TA delay amount.

[0159] Optionally, in the TA synchronization device, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0160] Optionally, in the TA synchronization device, the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0161] The timing delay initial information includes multiple initial values.

[0162] Optionally, in the TA synchronization device, the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0163] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0164] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0165] Optionally, in the TA synchronization device, the data sending module 820 is further configured to:

[0166] Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal;

[0167] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0168] Optionally, in the TA synchronization device, the first message is a random access response message or a system broadcast message.

[0169] Another aspect of the embodiment of the present invention further provides a base station, which is a first base station. Figure 9 As shown, the base station includes: a processor 901; and a memory 903 connected to the processor 901 through a bus interface 902, wherein the memory 903 is used to store programs and data used by the processor 901 when performing operations, and the processor 901 calls and executes the programs and data stored in the memory 903.

[0170] The transceiver 904 is connected to the bus interface 902 and is used to receive and send data under the control of the processor 901. Specifically, the processor 901 is used to read the program in the memory 903 and execute the following process:

[0171] During a random access process of a terminal, sending a first message to the terminal;

[0172] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value.

[0173] Optionally, in the base station, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0174] Optionally, in the base station, the processor 901 is further configured to:

[0175] Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard time slot GP symbol; or

[0176] Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

[0177] Optionally, the base station, wherein the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0178] The timing delay initial information includes multiple initial values.

[0179] Optionally, the base station, wherein the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0180] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0181] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0182] Optionally, in the base station, the processor 901 is further configured to:

[0183] Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount;

[0184] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0185] Optionally, in the base station, the first message is a random access response message or a system broadcast message.

[0186] Among them, Figure 9In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 901 and memory represented by memory 903. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 904 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 may store data used by the processor 901 when performing operations.

[0187] One embodiment of the present invention further provides a terminal, such as Figure 10 As shown, the terminal includes: a processor 1001; and a memory 1003 connected to the processor 1001 through a bus interface 1002, the memory 1003 is used to store programs and data used by the processor 1001 when performing operations, and a transceiver 1004 is connected to the bus interface 1002, and is used to receive and send data under the control of the processor 1001.

[0188] When the processor 1001 calls and executes the program and data stored in the memory 1003, the following process is performed:

[0189] During a random access process of a terminal, receiving a first message sent by a first base station;

[0190] The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value;

[0191] Uplink data is sent according to the TA delay amount.

[0192] Optionally, in the terminal, the TA delay amount is determined according to the reserved time length for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station.

[0193] Optionally, the terminal, wherein the TA delay amount is one of the initial values ​​in predefined timing delay initial information;

[0194] The timing delay initial information includes multiple initial values.

[0195] Optionally, the terminal, wherein the timing delay initial information includes first timing delay initial information corresponding to a first type of terminal and second timing delay initial information corresponding to a second type of terminal;

[0196] Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values;

[0197] The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive values, zero, and negative values.

[0198] Optionally, in the terminal, the processor 1001 is further configured to:

[0199] Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal;

[0200] Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

[0201] Optionally, in the terminal, the first message is a random access response message or a system broadcast message.

[0202] It should be noted that in Figure 10 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1001 and memory represented by memory 1003. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1004 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different terminals, the user interface 1005 may also be an interface capable of connecting external or internal devices as required, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 may store data used by the processor 1001 when performing operations.

[0203] A specific embodiment of the present invention further provides a readable storage medium having a program stored thereon, wherein the program, when executed by a processor, implements the steps in the TA synchronization method as described above.

[0204] Specifically, the readable storage medium is applied to the above-mentioned base station or terminal. When applied to the base station or terminal, the execution steps in the corresponding uplink scheduling method are as described in detail above and will not be repeated here.

[0205] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection of some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0206] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may be physically included separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or hardware plus software functional units.

[0207] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to perform some of the steps of the sending and receiving methods described in various embodiments of the present invention. The aforementioned storage medium includes: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, and other media that can store program code.

[0208] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for timing advance (TA) synchronization in a random access process, applied to a first base station, characterized in that: The method comprises: During a random access process of a terminal, sending a first message to the terminal; The first message includes a TA delay amount, and the TA delay amount is one of a positive value, zero, and a negative value; wherein the TA delay amount is determined according to the uplink and downlink radio frequency channel switching reserved time and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; The method further comprises: Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

2. The TA synchronization method according to claim 1, wherein: The method further comprises: Obtaining a downlink air interface transmission delay from the second base station to the first base station by measuring a pilot reference signal within a guard time slot GP symbol; or Determine a downlink air interface transmission delay from the second base station to the first base station according to the location information of the first base station and the location information of the second base station.

3. The TA synchronization method according to claim 1, characterized in that: The first message is a random access response message or a system broadcast message.

4. A method for TA synchronization during random access process, applied to a terminal, characterized in that: The method comprises: During a random access process of a terminal, receiving a first message sent by a first base station; The first message includes a TA delay, which is one of a positive value, zero, and a negative value; the TA delay is determined according to the reserved time for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; Sending uplink data according to the TA delay amount; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; Wherein, the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; The method further comprises: Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

5. The TA synchronization method according to claim 4, characterized in that: The first message is a random access response message or a system broadcast message.

6. A base station, the base station being a first base station, comprising a transceiver, characterized in that: The transceiver is used for: During a random access process of a terminal, sending a first message to the terminal; The first message includes a TA delay, which is one of a positive value, zero, and a negative value; the TA delay is determined according to the reserved time for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; Wherein, the transceiver is further used for: Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

7. A terminal comprising a transceiver, characterized in that: The transceiver is used for: During a random access process of a terminal, receiving a first message sent by a first base station; The first message includes a TA delay, which is one of a positive value, zero, and a negative value; the TA delay is determined according to the reserved time for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; Sending uplink data according to the TA delay amount; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; Wherein, the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; Wherein, the transceiver is further used for: Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

8. A device for timing advance TA synchronization in a random access process, applied to a first base station, characterized in that: The device comprises: A message sending module, configured to send a first message to a terminal during a random access process of the terminal; The first message includes a TA delay, which is one of a positive value, zero, and a negative value; the TA delay is determined according to the reserved time for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; Wherein, the message sending module is further used for: Indicating, to the terminal, through a physical random access channel PRACH resource allocated to the terminal, initial timing delay information used to determine the TA delay amount; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

9. A device for timing advance TA synchronization in a random access process, applied to a terminal, characterized in that: The device comprises: A message receiving module, configured to receive a first message sent by a first base station during a random access process of a terminal; The first message includes a TA delay, which is one of a positive value, zero, and a negative value; the TA delay is determined according to the reserved time for uplink and downlink radio frequency channel switching and the downlink air interface transmission delay from the second base station to the first base station, and the second base station is an interfering station of the first base station; A data sending module, configured to send uplink data according to the TA delay amount; The TA delay amount is one of the initial values ​​in the predefined timing delay initial information; Wherein, the timing delay initial information includes multiple initial values; The timing delay initial information includes first timing delay initial information corresponding to the first type of terminal and second timing delay initial information corresponding to the second type of terminal; Wherein, the multiple initial values ​​in the first timing delay initial information are all positive values; The multiple initial values ​​in the second timing delay initial information include initial values ​​of positive, zero and negative values; The message receiving module is further configured to: Determining timing delay initial information used for the TA delay amount by using a physical random access channel PRACH resource allocated by the first base station to the terminal; Among them, the first group of resources in the physical random access channel PRACH resources corresponds to the first type of terminal, and the second group of resources corresponds to the second type of terminal; the first group of resources and the second group of resources do not overlap.

10. A network device, characterized in that: include: A processor, a memory, and a program stored on the memory and executable on the processor, wherein when the program is executed by the processor, the method for TA synchronization during timing advance of a random access process according to any one of claims 1 to 3 is implemented, or the method for TA synchronization during timing advance of a random access process according to any one of claims 4 to 5 is implemented.

11. A readable storage medium, characterized in that: The readable storage medium stores a program, and when the program is executed by the processor, the steps of the method for timing advance TA synchronization of the random access process according to any one of claims 1 to 3 are implemented, or the steps of the method for timing advance TA synchronization of the random access process according to any one of claims 4 to 5 are implemented.

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