CN118317416A - Timing advance transmission method, device, equipment and medium - Google Patents
Timing advance transmission method, device, equipment and medium Download PDFInfo
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Abstract
The invention provides a transmission method, a device, equipment and a medium for timing advance, wherein the method is applied to a terminal, a first node and a second node, and the method applied to the terminal comprises the following steps: acquiring a first timing advance and a second timing advance; carrying out uplink transmission by using the first timing advance and/or the second timing advance; the first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the uplink signal sent by the terminal to the second node, so that different and proper timing advances can be adopted for uplink transmission for different nodes respectively, thereby avoiding mutual interference among signals in a cell and ensuring correct decoding of data.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a timing advance transmission method, a device, equipment and a medium.
Background
In the field of wireless communication technology, in the existing multi-TRP (Transmit-Receive Point) scenario, only that the transmission time for 2 TRPs to reach the UE (User Equipment) is considered to be basically the same, and the UE also adopts the same TA (TIMING ADVANCE ) to perform uplink transmission. However, in the FR2 band, since the carrier interval of the SCS (sub-CARRIER SPACE, subcarrier interval) is increased, the CP (Cyclic Prefix) is shortened, and the shortened CP may have difficulty in covering a transmission time difference of 2 TRP, and the TA is inaccurate, so that the transmission data cannot be correctly decoded.
Disclosure of Invention
The embodiment of the invention provides a timing advance transmission method, a device, equipment and a medium, which are used for solving the technical problem that in the prior art, UE adopts the same TA to carry out uplink transmission under a multi-TRP scene, and the transmission data cannot be decoded correctly due to inaccurate TA.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for transmitting timing advance in a multi-node scenario, where the method is applied to a terminal, and the method includes:
acquiring a first timing advance and a second timing advance;
carrying out uplink transmission by using the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the terminal sending the uplink signal to the second node.
Preferably, acquiring the second timing advance includes:
Receiving a second timing advance sent by the first node;
And/or receiving a second timing advance sent by the second node;
And/or receiving the offset value sent by the first node, and determining a second timing advance according to the first timing advance and the offset value.
Preferably, receiving the second timing advance transmitted by the first node includes:
respectively receiving downlink signals from a first node and a second node;
determining a time difference of the downlink signals of the first node and the second node according to the receiving time of the downlink signals;
and transmitting the time difference to the first node, wherein the time difference is used for determining a second timing advance.
Preferably, the method further comprises:
and transmitting an uplink transmission to the second node with the second timing advance.
Preferably, the uplink transmission is associated with a reference signal of the second node;
The reference signal includes at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a first value.
Preferably, the method further comprises:
and transmitting uplink transmission to the first node by the first timing advance.
Preferably, the uplink transmission is associated with a reference signal of the first node;
The reference signal includes at least one of: the downlink signal sent by the first node, the control resource set pool index of the first node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a second value.
Preferably, the method further comprises:
Receiving a timing adjustment instruction of the second node;
adjusting the second timing advance according to the timing adjustment instruction;
and taking the second timing advance after timing adjustment as a new second timing advance.
Preferably, the method further comprises:
Receiving a timing advance and/or a timing advance identifier sent by the first node;
Determining a timing advance to be updated, the timing advance to be updated comprising at least one of: a first timing advance, a second timing advance;
And updating the timing advance to be updated by adopting the timing advance.
Preferably, determining the timing advance to be updated comprises:
Determining the timing advance used when the uplink signal is transmitted last time as the timing advance to be updated;
or determining the timing advance to be updated according to the timing advance identifier.
Preferably, the second timing advance is associated with at least one second timing advance group.
In a second aspect, an embodiment of the present invention provides a method for transmitting timing advance in a multi-node scenario, where the method is applied to a first node, and the method includes:
A second timing advance and/or offset value is determined.
Preferably, determining the second timing advance and/or the offset value comprises:
Receiving a time difference sent by a terminal;
Wherein the time difference may be used to determine a second timing advance and/or a bias value.
Preferably, the time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node; the offset value is used for determining a second timing advance; the second timing advance is the timing advance of the terminal sending an uplink signal to the second node.
Preferably, the method further comprises:
determining the second timing advance according to the time difference and the first timing advance; the first timing advance is the timing advance of the uplink signal sent by the terminal to the first node.
Preferably, determining the second timing advance from the time difference and the first timing advance comprises:
And determining a second timing advance according to the time difference, the first timing advance and a synchronization error between the first node and the second node.
Preferably, the method further comprises:
And determining a bias value according to the time difference and the synchronization error between the first node and the second node.
Preferably, the method further comprises:
transmitting the second timing advance to the terminal; or transmitting the second timing advance to a second node.
Preferably, the method further comprises:
And sending the timing advance and/or the timing advance identification to the terminal.
Preferably, the timing advance identification is used to determine the timing advance to be updated.
In a third aspect, an embodiment of the present invention provides a method for transmitting timing advance in a multi-node scenario, where the method is applied to a second node, and the method includes:
Receiving a second timing advance sent by the first node;
and the terminal is instructed to send uplink transmission with the second timing advance.
Preferably, the instructing the terminal to send the uplink transmission with the second timing advance includes:
And after the second timing advance takes effect, the terminal is instructed to send uplink transmission by the second timing advance.
Preferably, the second timing advance is determined by the first node according to a time difference; the time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node.
Preferably, the method further comprises:
and adjusting the second timing advance.
Preferably, adjusting the second timing advance includes:
receiving uplink transmission sent by the terminal;
and adjusting the second timing advance according to the receiving time of the uplink transmission.
Preferably, the uplink transmission is associated with a reference signal of the second node;
The reference signal includes at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a first value.
Preferably, the second timing advance is associated with at least one second timing advance group.
In a fourth aspect, an embodiment of the present invention provides a transmission apparatus for timing advance in a multi-node scenario, where the apparatus is applied to a terminal, and the apparatus includes:
the acquisition module is used for acquiring the first timing advance and the second timing advance;
the transmission module is used for carrying out uplink transmission by the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the terminal sending the uplink signal to the second node.
In a fifth aspect, an embodiment of the present invention provides a transmission apparatus for timing advance in a multi-node scenario, where the apparatus is applied to a first node, and the apparatus includes:
and the determining module is used for determining the second timing advance and/or the offset value.
In a sixth aspect, an embodiment of the present invention provides a transmission apparatus for timing advance in a multi-node scenario, where the apparatus is applied to a second node, and the apparatus includes:
the receiving module is used for receiving a second timing advance sent by the first node;
and the sending module is used for indicating the terminal to send the uplink transmission by the second timing advance.
In a seventh aspect, an embodiment of the present invention provides a network device, including: a processor, a memory and a program stored on the memory and executable on the processor, the program realizing the steps of the timing advance transmission method according to the first aspect when executed by the processor, or the steps of the timing advance transmission method according to the second aspect when executed by the processor, or the steps of the timing advance transmission method according to the third aspect when executed by the processor.
In an eighth aspect, an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the timing advance transmission method according to the first aspect, or which, when executed by a processor, implements the steps of the timing advance transmission method according to the second aspect, or which, when executed by the processor, implements the steps of the timing advance transmission method according to the third aspect.
In the embodiment of the invention, the method applied to the terminal comprises the following steps: acquiring a first timing advance and a second timing advance; carrying out uplink transmission by using the first timing advance and/or the second timing advance; the first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the uplink signal sent by the terminal to the second node, so that different and proper timing advances can be adopted for uplink transmission for different nodes respectively, interference among signals in a cell is avoided, and correct decoding of data is ensured.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
Fig. 1 is a flowchart of a transmission method of timing advance according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a terminal receiving downlink signals from a first node and a second node according to an embodiment of the present invention;
fig. 3 is a flowchart of a transmission method of timing advance according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a relationship between time difference and timing advance without considering synchronization error according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a relationship between time difference and timing advance in consideration of synchronization error according to an embodiment of the present invention;
fig. 6 is a flowchart of a transmission method of timing advance according to an embodiment of the present invention;
FIG. 7 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention;
FIG. 8 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention;
FIG. 9 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention;
Fig. 10 is a block diagram of a network device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following embodiments of the present invention relate to an information interaction flow among a terminal, a first node, and a second node, and now introduce a timing advance transmission method in a multi-node scenario with the terminal, the first node, and the second node as emphasis points, respectively. It should be noted that, the first node and the second node may be a plurality of base stations, a plurality of cells, or a plurality of TRPs, where the first node is a node corresponding to a current serving cell of the terminal, and the second node is a node corresponding to a non-current serving cell, or the second node may also be a candidate cell.
Fig. 1 shows a transmission method of timing advance in a multi-node scenario according to an embodiment of the present invention, where the method shown in fig. 1 is applied to a terminal, the method includes:
Step S101, acquiring a first timing advance and a second timing advance;
step S102, uplink transmission is carried out according to the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node, and the second timing advance is the timing advance of the uplink signal sent by the terminal to the second node, and the uplink signal can be an uplink channel.
In one possible implementation manner, the terminal in step S101 obtains the second timing advance in three cases: receiving a second timing advance sent by the first node; and/or receiving a second timing advance sent by the second node; and/or, receiving the offset value sent by the first node, and determining the second timing advance according to the first timing advance and the offset value. Wherein receiving the second timing advance sent by the first node includes: respectively receiving downlink signals from a first node and a second node; determining the time difference of the downlink signals of the first node and the second node according to the receiving time of the downlink signals; the time difference is transmitted to the first node, wherein the time difference is used to determine the second timing advance (if at the perspective of the first node, the first node may determine the second timing advance and/or the offset value based on the time difference and transmit the second timing advance and/or the offset value to the terminal). It should be noted that, the downlink signal may also be a downlink channel, and a schematic diagram of the terminal receiving the downlink signals from the first node and the second node is shown in fig. 2.
The above implementation is described taking a specific application scenario as an example. The UE (i.e. the above terminal) accesses from the base station 1 (i.e. the above first node, which may be TRP 1), performs downlink synchronization (as shown in fig. 2) through ssb#1, then obtains uplink synchronization to TRP1 through corresponding PRACH, the UE may obtain uplink timing advance TA1 (i.e. the above first timing advance) from the access process of TRP1, the UE receives ssb#1 (as shown in fig. 2) and ssb#2 from TRP2 (as shown in fig. 2) to obtain an arrival time difference offset of the downlink signal between the two nodes, and this information may assist the base station 1 in adjusting the timing advance of the UE for TRP2 uplink communication. However, it should be noted that, in the prior art, the difference between the propagation times acquired by the TRP1 and the TRP2 is not known, and therefore, in the above implementation of the embodiment of the present invention, the time difference may be used to determine the second timing advance, and in a preferred implementation, the first node may receive the time difference from the terminal, and perform the configuration of the UE to the timing of the TRP2 uplink communication according to the time difference. In summary, the UE may access TRP1 to obtain TA1, receive ssb#1 from TRP1 and ssb#2 from TRP2, obtain an arrival time difference offset of the downlink signal between the two nodes, and report the arrival time difference offset to TRP1, so that TRP1 indicates TA2 (i.e. the second timing advance) or indicates offset value offset2 of TA2 compared to TA1 based on the offset (corresponding to the terminal in the above implementation may receive the second timing advance sent by the first node), and/or receives the offset value sent by the first node.
In one possible implementation, the method further includes: an uplink transmission is transmitted to the second node with a second timing advance. In the above implementation manner, the first node configures the second timing advance according to the time difference from the terminal, so that the second timing advance for the second node can be accurately configured by using the time difference, so as to solve the technical problem that in the prior art, in a multi-TRP scene, the UE adopts the same TA to perform uplink transmission, the TA definition is inaccurate, and thus the transmission data cannot be decoded correctly.
It should be noted that, the uplink transmission may be an uplink signal and/or an uplink channel, where the uplink transmission is associated with the reference signal of the second node; the reference signal includes at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node, and the control resource set pool index of CORESET associated with the control channel of uplink transmission is a first value. That is, TRP1 schedules transmission of SRS in which the UE transmits an SSB associated with TRP2 or other reference signal of TRP2 to TRP2 using TA 2. In one possible implementation, the method further includes: the uplink transmission is transmitted to the first node with a first timing advance. The uplink transmission may be an uplink signal and/or an uplink channel, the uplink transmission being associated with a reference signal of the first node; the reference signal includes at least one of: the first node transmits a downlink signal, a control resource set pool index of the first node, and a control resource set pool index of CORESET associated with a control channel of uplink transmission is a second value. The uplink transmission includes at least one of: SRS, DMRS, CQI, ACK, NACK, PUSCH.
In one possible implementation, the method further includes: receiving a timing adjustment instruction of a second node; and adjusting the second timing advance according to the timing adjustment instruction to enable the second timing advance after timing adjustment to be a new second timing advance. It should be noted that, TRP2 may acquire TA2 or time of arrival of an uplink signal according to the uplink SRS transmission of the UE, and TRP2 may adjust TA2 corresponding to the relevant SSB or other reference signals at the home terminal. Therefore, TRP2 can verify TA2 configured by TRP1 according to the time difference offset measured by the UE, TRP2 can obtain accurate timing information by receiving uplink SRS transmission or other uplink transmission of the UE, and adjust (calibrate) TA2 to further ensure accuracy of timing advance.
In one possible implementation, the method further includes: receiving a timing advance and/or a timing advance identifier sent by a first node; determining a timing advance to be updated, the timing advance to be updated comprising at least one of: a first timing advance, a second timing advance; and updating the timing advance to be updated by adopting the timing advance. Wherein determining the timing advance to be updated comprises: determining the timing advance used when the uplink signal is transmitted last time as the timing advance to be updated; or determining the timing advance to be updated according to the timing advance identification.
It should be noted that, the timing advance to be updated is the timing advance that needs to be updated. The first node needs to indicate a specific TA or an identification of the TA when performing TA update, or the UE defaults to update the timing advance used when the uplink signal is transmitted last time. In a specific application scenario, the first node may specifically indicate or configure a TA for uplink transmission of a non-own cell, for example: TRP1 indicates the UE's dedicated TA for other cells (not the current serving cell sending the message) or non-serving cells, and in case TRP1 is not specifically indicated, the UE may update the current uplink TA for transmission or the TA of the cell sending the MAC CE. Thus, the timing advance can be updated as needed according to the actual situation. And in a preferred implementation, the second timing advance is associated with at least one second timing advance group.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
The above-described embodiment focuses on a transmission method of timing advance in a multi-node scenario applied to a terminal side, and fig. 3 shows a transmission method of timing advance in a multi-node scenario applied to a first node side, as shown in fig. 3, the method includes:
step S301, receiving a time difference sent by a terminal;
Step S302, determining a second timing advance and/or a bias value according to the time difference.
The time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node, and the time difference can be used for determining the second timing advance and/or the offset value, and the time difference can be time or other time parameters. In a preferred implementation, the first node may receive the time difference and determine the second timing advance and/or the offset value based on the time difference to ensure accuracy of the second timing advance. However, the embodiment of the present invention is not limited to this, and in a specific application scenario, the first node does not necessarily determine the second timing advance according to the time difference. And the offset value may be used to determine a second timing advance, which is the timing advance of the terminal sending the uplink signal to the second node.
In a preferred implementation, the first node may determine the second timing advance based on the time difference and the first timing advance; the first timing advance is the timing advance of the uplink signal sent by the terminal to the first node. Specifically, the first node may further determine the second timing advance at the first node side according to the time difference, the first timing advance, and a synchronization error between the first node and the second node, so as to further ensure accuracy of the second timing advance. Or the first node may determine the offset value according to the time difference and the synchronization error between the first node and the second node, and send the offset value to the terminal, so that on the terminal side, the terminal determines the second timing advance according to the first timing advance and the offset value (corresponding to one of the three methods that the terminal obtains the second timing advance in the above embodiment).
The principle and concept of the method for determining the second timing advance by the first node will now be described in detail. The embodiment of the invention considers that: the UE (the above terminal) may estimate the timing advance and the propagation delay difference (the above time difference) by receiving SSBs of the first and second nodes in the downlink, and the transmission time points in the downlink are aligned without considering the synchronization error between the first and second nodes, as shown in fig. 4. If there is a synchronization error between the first node and the second node, the synchronization error will not exceed 3us in normal cases, and if the synchronization error is greater than 3us, a cross time slot interference will occur between the first node and the second node (the downlink of one node will affect the uplink reception of the other base station), so the delay difference (the above time difference) of the propagation from 2 nodes to the UE can be obtained by the difference of the arrival times of the downlink SSBs. Ideally, as shown in fig. 4, if the synchronization error between the first node and the second node is not considered, the propagation delay difference offset=tp2-TP 1, and the formula is equivalent to the above implementation manner: the time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node. Since the timing advance of the uplink is to compensate for the propagation delay of the uplink transmission, the TA to the second node can be compensated based on the propagation delay difference (offset) of the downlink. That is, the second timing advance may be determined by the following formula:
TA2＝2*TP2＝2*(TP1+offset)＝TA1+2*offset；
However, the difference in propagation delay or the difference in arrival time of the downlink measured by the UE is not known to trp#1 (first node) and trp#2 (second node). Thus, in embodiments of the present invention, the terminal may send the time difference to the first node so that the first node may configure the second timing advance according to the time difference.
If the synchronization error between base stations is further considered, the situation is as shown in fig. 5, and the equation for determining TA2 is as follows:
TA2＝2*TP2＝2*(offset+TP1-delta)＝TA1+2*offset-2*delta
Offset＝TRX2-TRX1＝(delta+L_slot+TP2)-(L_slot+TP1)＝delta+(TP2-TP1)
t1=1/2×ta1, tp2=1/2×ta2. Here, the timing advance of TA1 refers to the timing advance when TRP1 is uplink-transmitted with reference to the downlink arrival time of TRP 1. The timing advance of TA2 is the timing advance when TRP2 is transmitted in the uplink with the arrival time of the downlink signal of TRP2 as the reference point.
Delta is a synchronization error between TRP1 and TRP2, and has an influence on the downlink receiving timing of the UE. And the synchronization error Delta can be obtained by interaction among TRPs based on common timing reference information (such as GPS timing information or time service information indicated by 1588 protocol). TRX2 is the arrival time of the UE receiving TRP2 downlink signal, and TRX1 is the arrival time of the UE receiving TRP1 downlink signal.
If the UE is to estimate the uplink timing for TRP2, it needs to consider offset and timing error Delta (synchronization error) between base stations on the basis of TA 1. While delta is not available to the UE. Thus, the embodiments of the present invention disclose: the first node can also determine a second timing advance according to the time difference, the first timing advance and a synchronization error between the first node and the second node, so as to solve the problem that the UE cannot acquire the timing error Delta. The embodiment of the invention comprehensively considers the situation that the first node cannot acquire the time difference and the terminal cannot acquire the synchronous error to construct the technical scheme, so that the first node can configure the second timing advance. In summary, the first node may directly configure and indicate TA2, or may configure and indicate offset value offset_2 of TA2 compared to TA1, where configuring the offset value may reduce the indicated bit number compared to directly indicating a specific TA 2.
In one possible implementation, the method further includes: transmitting a second timing advance to the terminal; or send the second timing advance to the second node.
It should be noted that, TRP1 may indicate or configure SRS transmission of SSB associated with TRP2 or other reference signals (such as coreset pool inde) of TRP2, UE uses TA2 to perform SRS transmission (corresponding to the terminal shown in fig. 1 receiving the second timing advance and performing uplink transmission with the second timing advance), and in addition, the TRP1 and TRP2 may interact with the operating time of TA2 that the UE may use (i.e. after X time, UE may use TA2 to perform transmission) and/or TA2. That is, there are two cases, that is, the first node may send the second timing advance to the terminal, and the terminal performs uplink transmission with the second timing advance; the first node may also send the second timing advance to the second node, and the second node may receive the second timing advance sent by the first node, and instruct the terminal to send uplink transmission with the second timing advance (which is described in a transmission method that focuses on the timing advance of the second node later).
In one possible implementation, the method further includes: and sending the timing advance and/or the timing advance identification to the terminal. The timing advance identification is used to determine the timing advance to be updated. The timing advance to be updated is the timing advance to be updated, and the embodiment of the invention discloses a configuration method of the timing advance and also discloses the condition of maintaining and updating the timing advance. It is understood that the updated timing advance and the timing advance do not substantially differ, and the method for configuring the timing advance is also applicable to the updated timing advance. In updating the timing advance, the first node needs to
Indicates the specific TA or identity of the TA, or the UE defaults to updating the timing advance used by 5 when the uplink signal was last transmitted. In a specific application scenario, the first node may specifically indicate or configure a TA for uplink transmission of a non-own cell, for example: TRP1 indicates the UE's dedicated TA for other cells (not the current serving cell sending the message) or non-serving cells, and in case TRP1 is not specifically indicated, the UE may update the current uplink TA for transmission or the TA of the cell sending the MAC CE. Thus, the timing advance can be updated as needed according to the actual situation. And in one preferred 0 implementation, the second timing advance is associated with at least one second timing advance group.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
Fig. 6 is a flowchart of a method for timing advance according to an embodiment of the present invention, where, as shown in fig. 6, the method is applied to a second node, and the method includes:
step S601, receiving a second timing advance sent by the first node;
Step S602, the terminal is instructed to send uplink transmission with the second timing advance.
In a preferred implementation, instructing the terminal to send the uplink transmission with the second timing advance includes:
after the second timing advance is validated, the terminal is instructed to transmit uplink transmission with the second timing advance, namely
In other words, the working time of TA2 that can be adopted by the UE can be interacted between TRP1 and TRP2 (i.e. after X time 0, the UE can transmit by using TA2 after the second timing advance takes effect), thereby ensuring standardization of signal transmission.
As in the previous embodiments, the second timing advance is determined by the first node according to the time difference (but not limited to this implementation), and the time difference is the time difference that the terminal receives the downlink signal of the first node and the second node
The time of the downstream signal of the second node. And the second timing advance is associated with at least one second timing advance 5 preamble group.
In one possible implementation, the method further includes: adjusting the second timing advance, specifically, receiving uplink transmission sent by the terminal; and adjusting the second timing advance according to the receiving time of the uplink transmission. That is, the second node may obtain accurate timing information by receiving the uplink SRS transmission of the terminal or the receiving time of other uplink transmissions, and adjust (calibrate) the TA2 to further ensure accuracy of the timing advance. And the second node can also acquire the effective time of the second timing advance and the identification of the TA to be updated through information interaction with the first node, and after the effective time of the second timing advance arrives, the second node can schedule the terminal to carry out uplink transmission (such as PUSCH or SRS) by adopting the second timing advance, and the second node can adjust the timing advance corresponding to the identification of the TA to be updated obtained through interaction between the local terminal and the first node according to the receiving time of the uplink actual transmission.
In one possible implementation, the uplink transmission is associated with a reference signal of the second node, the reference signal comprising at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node, and the control resource set pool index of CORESET associated with the control channel of uplink transmission are the first value. Wherein the uplink transmission may be an uplink signal and/or an uplink channel. The uplink transmission includes at least one of: SRS, DMRS, CQI, ACK, NACK, PUSCH.
In summary, in a specific application scenario, after TA2 is validated, TRP1 schedules UE to transmit an SSB associated with TRP2 or SRS transmission of other reference signals of TRP2 to TRP2 by using TA2, and TRP2 obtains arrival time of TA2 or uplink signals according to UE uplink SRS transmission, and adjusts TA2 corresponding to the associated SSB or other reference signals at the home terminal. In addition, TRP1 may inform TRP2 of TA2 that needs to be updated and/or the id of the TA for TRP2 when the TA update is performed, so that TRP2 knows which TA should be updated.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
The above embodiments introduce a transmission method of timing advance in a multi-node scenario from the angles of the terminal, the first node and the second node, and now three execution bodies are integrated, so that the main invention point of the embodiment of the present invention is briefly introduced.
The UE is accessed from TRP1, performs downlink synchronization through SSB#1 of TRP1, and then acquires uplink synchronization of TRP1 and uplink TA1 through corresponding PRACH. The UE receives ssb#1 and ssb#2 from TRP2, obtains an arrival time difference offset of a downlink signal between the two nodes, and reports the offset to TRP1. Compared with an offset value of TA1, offset_2=2, offset- [2, delta ] of the configuration TA2 of the TRP1, delta is a synchronization error among the TRP, and is obtained by interaction among the TRP based on common timing reference information (such as GPS timing information or time service information indicated by 1588 protocol), and then TA2 of uplink transmission of the TRP2 by the UE is obtained by calculating the TRP1 or the UE according to the TA 2=ta 1+offset_2, and TA2 is saved to the UE or the TA1 of the UE is updated to TA2.
After a certain time, TRP1 indicates or configures transmission of SRS of SSB associated with TRP2 or other reference signals (such as coreset pool inde) of TRP2, UE adopts TA2 to transmit SRS, TRP2 acquires TA2 or uplink signal arrival time according to transmission of UE uplink SRS, and adjusts TA2 corresponding to the associated SSB or other reference signals at the local end; or the effective time of TA2 and the identification of the TA to be updated are obtained through interaction among TRPs, after the effective time is reached, the TRP2 schedules the UE to carry out uplink transmission (PUSCH or SRS) by adopting the TA2, and the TRP2 adjusts the TA corresponding to the identification of the TA to be updated, which is obtained through interaction between the terminal and the TRP1, according to the reaching time of the uplink actual transmission.
Fig. 7 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention, where the apparatus is applied to a terminal, and as shown in fig. 7, an apparatus 70 includes:
an acquiring module 701, configured to acquire a first timing advance and a second timing advance;
A transmission module 702, configured to perform uplink transmission with the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the terminal transmitting the uplink signal to the second node.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
Fig. 8 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention, where the apparatus is applied to a first node, and as shown in fig. 8, an apparatus 80 includes:
a determining module 801 is configured to determine a second timing advance and/or offset value.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
Fig. 9 is a block diagram of a timing advance propagation apparatus according to an embodiment of the present invention, where the apparatus is applied to a second node, and as shown in fig. 9, an apparatus 90 includes:
a receiving module 901, configured to receive a second timing advance sent by a first node;
A sending module 902, configured to instruct the terminal to send the uplink transmission with the second timing advance.
Therefore, for different nodes, different and proper timing advance can be adopted to carry out uplink transmission, so that interference among signals in a cell is avoided, and correct decoding of data is ensured.
An embodiment of the present invention provides a network device 100, as shown in fig. 10, where the network device 100 includes: the processor 1001, the memory 1002, and a program stored in the memory 1002 and executable on the processor 1001, which when executed by the processor 1001, implement the steps of the transmission method of timing advance as shown in the above-described embodiment.
The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements the steps of the timing advance transmission method as shown in the foregoing embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no redundant description is provided herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (34)
1. A method for transmitting timing advance in a multi-node scenario, wherein the method is applied to a terminal, the method comprising:
acquiring a first timing advance and a second timing advance;
carrying out uplink transmission by using the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the terminal sending the uplink signal to the second node.
2. The method of claim 1, wherein obtaining the second timing advance comprises:
Receiving a second timing advance sent by the first node;
And/or receiving a second timing advance sent by the second node;
And/or receiving the offset value sent by the first node, and determining a second timing advance according to the first timing advance and the offset value.
3. The method of claim 2, wherein receiving the second timing advance transmitted by the first node comprises:
respectively receiving downlink signals from a first node and a second node;
determining a time difference of the downlink signals of the first node and the second node according to the receiving time of the downlink signals;
And sending the time difference to the first node.
4. The method of claim 3, wherein the step of,
The time difference is used to determine a second timing advance.
5. The method according to claim 1, wherein the method further comprises:
and transmitting an uplink transmission to the second node with the second timing advance.
6. The method of claim 5, wherein the step of determining the position of the probe is performed,
The uplink transmission is associated with a reference signal of the second node;
The reference signal includes at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a first value.
7. The method according to claim 1, wherein the method further comprises:
and transmitting uplink transmission to the first node by the first timing advance.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
The uplink transmission is associated with a reference signal of the first node;
The reference signal includes at least one of: the downlink signal sent by the first node, the control resource set pool index of the first node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a second value.
9. The method according to claim 1, wherein the method further comprises:
Receiving a timing adjustment instruction of the second node;
adjusting the second timing advance according to the timing adjustment instruction;
and taking the second timing advance after timing adjustment as a new second timing advance.
10. The method according to claim 1, wherein the method further comprises:
Receiving a timing advance and/or a timing advance identifier sent by the first node;
Determining a timing advance to be updated, the timing advance to be updated comprising at least one of: a first timing advance, a second timing advance;
And updating the timing advance to be updated by adopting the timing advance.
11. The method of claim 10, wherein determining the timing advance to be updated comprises:
Determining the timing advance used when the uplink signal is transmitted last time as the timing advance to be updated;
or determining the timing advance to be updated according to the timing advance identifier.
12. The method of any of claims 1-11, wherein the second timing advance is associated with at least one second timing advance group.
13. A method for transmitting timing advance in a multi-node scenario, the method being applied to a first node, the method comprising:
A second timing advance and/or offset value is determined.
14. The method of claim 13, wherein determining the second timing advance and/or offset value comprises:
And receiving the time difference sent by the terminal.
15. The method of claim 14, wherein the step of providing the first information comprises,
The time difference is used to determine a second timing advance and/or offset value.
16. The method of claim 14, wherein the step of providing the first information comprises,
The time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node; the offset value is used for determining a second timing advance; the second timing advance is the timing advance of the terminal sending an uplink signal to the second node.
17. The method of claim 14, wherein the method further comprises:
determining the second timing advance according to the time difference and the first timing advance; the first timing advance is the timing advance of the uplink signal sent by the terminal to the first node.
18. The method of claim 17, wherein determining the second timing advance based on the time difference and the first timing advance comprises:
And determining a second timing advance according to the time difference, the first timing advance and a synchronization error between the first node and the second node.
19. The method of claim 14, wherein the method further comprises:
And determining a bias value according to the time difference and the synchronization error between the first node and the second node.
20. The method of claim 13, wherein the method further comprises:
Transmitting the second timing advance to a terminal; or transmitting the second timing advance to a second node.
21. The method of claim 13, wherein the method further comprises:
and sending the timing advance and/or the timing advance identification to the terminal.
22. The method of claim 21, wherein the timing advance identification is used to determine a timing advance to update.
23. A method for transmitting timing advance in a multi-node scenario, the method being applied to a second node, the method comprising:
Receiving a second timing advance sent by the first node;
and the terminal is instructed to send uplink transmission with the second timing advance.
24. The method of claim 23, wherein instructing the terminal to send the uplink transmission with the second timing advance comprises:
And after the second timing advance takes effect, the terminal is instructed to send uplink transmission by the second timing advance.
25. The method of claim 23, wherein the step of determining the position of the probe is performed,
The second timing advance is determined by the first node according to the time difference; the time difference is determined by the terminal according to the time of receiving the downlink signal of the first node and the downlink signal of the second node.
26. The method of claim 23, wherein the method further comprises:
and adjusting the second timing advance.
27. The method of claim 26, wherein adjusting the second timing advance comprises:
receiving uplink transmission sent by the terminal;
and adjusting the second timing advance according to the receiving time of the uplink transmission.
28. The method of claim 23, wherein the uplink transmission is associated with a reference signal of the second node;
The reference signal includes at least one of: the downlink signal sent by the second node, the control resource set pool index of the second node,
And the control resource set pool index of CORESET associated with the control channel of the uplink transmission is a first value.
29. The method of any of claims 23-28, wherein the second timing advance is associated with at least one second timing advance group.
30. A transmission apparatus for timing advance in a multi-node scenario, the apparatus being applied to a terminal, the apparatus comprising:
the acquisition module is used for acquiring the first timing advance and the second timing advance;
the transmission module is used for carrying out uplink transmission by the first timing advance and/or the second timing advance;
The first timing advance is the timing advance of the uplink signal sent by the terminal to the first node; the second timing advance is the timing advance of the terminal sending the uplink signal to the second node.
31. A transmission apparatus for timing advance in a multi-node scenario, the apparatus being applied to a first node, the apparatus comprising:
and the determining module is used for determining the second timing advance and/or the offset value.
32. A transmission apparatus for timing advance in a multi-node scenario, the apparatus being applied to a second node, the apparatus comprising:
the receiving module is used for receiving a second timing advance sent by the first node;
and the sending module is used for indicating the terminal to send the uplink transmission by the second timing advance.
33. A network device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, the program when executed by the processor implementing the steps of the timing advance transmission method according to any one of claims 1 to 12, or the program when executed by the processor implementing the steps of the timing advance transmission method according to any one of claims 13 to 22, or the program when executed by the processor implementing the steps of the timing advance transmission method according to any one of claims 23 to 29.
34. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the transmission method of a timing advance according to any one of claims 1 to 12, or which computer program, when being executed by a processor, implements the steps of the transmission method of a timing advance according to any one of claims 13 to 22, or which program, when being executed by the processor, implements the steps of the transmission method of a timing advance according to any one of claims 23 to 29.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310017339.1A CN118317416A (en) | 2023-01-06 | 2023-01-06 | Timing advance transmission method, device, equipment and medium |
| PCT/CN2024/070279 WO2024146544A1 (en) | 2023-01-06 | 2024-01-03 | Transmission method and apparatus for timing advance, and device and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310017339.1A CN118317416A (en) | 2023-01-06 | 2023-01-06 | Timing advance transmission method, device, equipment and medium |
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| CN118317416A true CN118317416A (en) | 2024-07-09 |
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| CN202310017339.1A Pending CN118317416A (en) | 2023-01-06 | 2023-01-06 | Timing advance transmission method, device, equipment and medium |
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|---|---|---|---|---|
| CN102917393A (en) * | 2011-08-05 | 2013-02-06 | 华为技术有限公司 | Timing advance TA determining method, information transmitting method and equipment |
| CN113163481B (en) * | 2020-01-23 | 2022-12-27 | ***通信有限公司研究院 | Method for determining uplink transmission timing, terminal and base station |
| FI20205398A1 (en) * | 2020-04-20 | 2021-10-21 | Nokia Technologies Oy | Determining timing advance |
| CN117641458A (en) * | 2022-08-17 | 2024-03-01 | ***通信有限公司研究院 | Uplink transmission method, device, equipment, system and storage medium |
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