CN113766625A - Timing advance compensation indication and determination method, device, apparatus and medium - Google Patents
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Abstract
The invention discloses a timing advance compensation indication and determination method, a device and a medium, comprising the following steps: a terminal acquires first configuration information, wherein the first configuration information comprises a corresponding relation between physical random access channel resource configuration and timing advance compensation when a random access process is initiated; and the terminal determines the timing advance compensation required by sending the uplink signal, and selects a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to the first configuration information. The base station acquires the first configuration information, receives the detection leader sequence and the time frequency resource bearing the leader sequence, and determines the timing advance compensation of the terminal according to the first configuration information and the detection result. By adopting the invention, the uplink scheduling can be ensured to be correct and the uplink transmission efficiency can be improved.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a timing advance compensation indication method, a timing advance compensation determination device, a timing advance compensation indication apparatus, and a timing advance compensation indication medium.
Background
In order to realize the connection between the terminal and the base stationWhen the terminal sends the uplink data, a Timing Advance is needed, the Timing Advance is assumed to be TA-adjust (TA: Timing Advance, Timing Advance), and the parameter is determined according to the indication of the base station. Taking the existing 5G system as an example, TA-adjust ═ (N)TA+NTA,offset)·TcWherein T iscTiming adjustment of time units, N, for a UE (User Equipment)TA,offsetA Frequency band position and a Duplex mode configuration for transmitting uplink data by a UE side are determined, and one existing mode is that a specific parameter value is determined with reference to a 3GPP TS 38.133V16.0.0 table 7.1.2-2, for example, a TDD (Time Division Duplex) mode is adopted, a Frequency band is a low Frequency FR (Frequency range)1, and a value is 0 if there is coexistence of NR-LTE (Long Term Evolution); adopting TDD or FDD (Frequency Division Duplex) mode, Frequency band low Frequency FR1 and no NR-LTE coexistence, then the value is 25600, NTAIt is determined from the timing advance indication received by the UE. N if the UE sends uplink data as Msg3 sent after receiving random access response Msg (message) 2 in the conventional 4-step random access procedureTA＝TA·16·64/2μWherein T isAFor the timing advance indicated by RAR (Random Access Response) related to the preamble sequence transmitted by the terminal in Msg2, the parameter μ is a parameter related to the subcarrier spacing of uplink transmission, for example, if the subcarrier spacing is 15KHz, μ is 0. If the UE transmits uplink data and newly receives an uplink timing advance command indicated by a MAC CE (Media Access Control Unit; MAC: Media Access Control; CE: Control Unit, Control Element), NTA_new＝NTA_old+(TA-31)·16·64/2μWherein T isAIs the timing advance indicated in the timing advance command.
According to the existing system, the terminal obtains the timing advance indication in the random access process and the RRC (Radio Resource Control) connection state, and when sending the random access signal (generating the random access preamble sequence), the timing advance N is advancedTAIs zeroI.e. without timing advance pre-compensation. In the existing system, the maximum range of the timing advance indication is 2ms, which corresponds to the maximum coverage supported by the base station.
The prior art has the defect that the prior timing advance processing mode is not suitable for the communication environment with the range of more than 2 ms.
Disclosure of Invention
The invention provides a timing advance compensation indication and determination method, a device and a medium, which are used for solving the problem that the existing timing advance processing mode is not suitable for the communication environment with the range of more than 2 ms.
The embodiment of the invention provides a timing advance compensation indication method, which comprises the following steps:
a terminal acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
and the terminal determines the timing advance compensation required by sending the uplink signal, and selects a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to the first configuration information.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In an implementation, when the preamble sequence is grouped, the method further includes:
and if the PUSCH load needing to be sent due to the triggering of the random access exceeds the set size and the group where the leader sequence is located is replaced, when the PUSCH load and the group where the leader sequence corresponding to the timing advance compensation are in conflict, adjusting the group where the leader sequence corresponding to the timing advance compensation is located.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the method further comprises the following steps:
if the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
In an implementation, the first configuration information is sent by the base station to the terminal, and/or is written to the UE according to a protocol agreement.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
The embodiment of the invention provides a timing advance compensation determining method, which comprises the following steps:
a base station acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
and the base station receives the detection leader sequence and the time-frequency resource bearing the leader sequence, and determines the timing advance compensation of the terminal according to the first configuration information and the detection result.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the first configuration information is written to the base station according to a protocol convention.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
In an implementation, the method further comprises the following steps:
and the base station acquires the complete timing advance information of the terminal by combining the timing advance indication given to the terminal and schedules the uplink transmission resource for the terminal according to the timing advance information.
An embodiment of the present invention provides a terminal, including:
a processor for reading the program in the memory, performing the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
determining timing advance compensation required by sending an uplink signal, and selecting a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to first configuration information;
a transceiver for receiving and transmitting data under the control of the processor.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In an implementation, when the preamble sequence is grouped, the method further includes:
and if the PUSCH load needing to be sent due to the triggering of the random access exceeds the set size and the group where the leader sequence is located is replaced, when the PUSCH load and the group where the leader sequence corresponding to the timing advance compensation are in conflict, adjusting the group where the leader sequence corresponding to the timing advance compensation is located.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the method further comprises the following steps:
if the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
In an implementation, the first configuration information is sent by the base station to the terminal, and/or is written to the UE according to a protocol agreement.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
An embodiment of the present invention provides a base station, including:
a processor for reading the program in the memory, performing the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
receiving a detection leader sequence and a time frequency resource bearing the leader sequence, and determining timing advance compensation of the terminal according to the first configuration information and the detection result;
a transceiver for receiving and transmitting data under the control of the processor.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the first configuration information is written to the base station according to a protocol convention.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
In an implementation, the method further comprises the following steps:
and combining the timing advance indication given to the terminal to obtain the complete timing advance information of the terminal, and scheduling uplink transmission resources for the terminal according to the timing advance information.
The embodiment of the invention provides a timing advance compensation indicating device, which comprises:
a terminal acquisition module, configured to acquire first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the terminal sending module is used for determining the timing advance compensation required by sending the uplink signal, and selecting the leader sequence corresponding to the timing advance compensation and the time-frequency resource bearing the leader sequence to send the leader sequence according to the first configuration information.
The embodiment of the invention provides a timing advance compensation determining device, which comprises:
a base station obtaining module, configured to obtain first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the base station receiving module is used for receiving the detection leader sequence and the time-frequency resource bearing the leader sequence and determining the timing advance compensation of the terminal according to the first configuration information and the detection result.
An embodiment of the present invention provides a computer-readable storage medium storing a computer program for executing the above timing advance compensation indication method and/or timing advance compensation determination method.
The invention has the following beneficial effects:
in the scheme provided by the embodiment of the invention, a terminal can acquire first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated; therefore, after the terminal determines the timing advance compensation required for sending the uplink signal, the preamble sequence corresponding to the timing advance compensation and the time-frequency resource bearing the preamble sequence can be selected to send the preamble sequence according to the first configuration information. By the method, the terminal can report the terminal uplink timing advance compensation information to the base station through the recessive indication in the random access process. And the base station can acquire the complete uplink timing compensation information of the terminal, so that the uplink scheduling can be ensured to be correct and the uplink transmission efficiency can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a timing advance compensation indication method of a terminal side according to an embodiment of the present invention;
FIG. 2 is a timing advance compensation determining method of a base station side according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating conflicts in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a base station structure according to an embodiment of the present invention.
Detailed Description
The inventor notices in the process of invention that:
the existing timing advance processing mode is not suitable for a long-distance communication scene between a terminal and a base station, for example, a non-ground communication scene, and an uplink timing advance range is required to be far beyond an indicating range of the existing system. In order to realize that the uplink transmission signal can be correctly detected at the base station side, the terminal needs to transmit the uplink signal, including the random access signal and the like as the base station timing advance indication NTAAnd NTA,offsetExternal timing advance pre-compensation. The timing advance precompensation is superimposed with N of the existing systemTAAnd NTA,offsetThe uplink timing advance range of the terminal is expanded, and the communication requirement of a longer distance is correspondingly supported.
The timing advance pre-compensation is performed for the uplink signal of the terminal, and the timing advance pre-compensation can be performed according to the system indication, that is, the base station indicates or agrees with the timing advance information of one or more reference positions for the terminal, and the terminal uses the timing advance information of one reference position as the timing advance compensation information. Correspondingly, if the terminal selects one piece of timing advance compensation information from the timing advance information of the multiple reference positions, the base station in the existing system cannot know which one the terminal selects as the timing advance compensation, and further cannot know the complete uplink timing advance information of the terminal.
When the base station cannot acquire the complete uplink timing advance information of the terminal, the base station side uplink resource scheduling is affected. The base station needs to refer to the uplink timing advance information of the terminal, so that the terminal is ensured to have enough processing time delay to process the scheduled uplink signal after receiving the downlink signal of the scheduled uplink transmission. If the base station does not acquire the terminal uplink timing advance information, the terminal does not have enough processing time delay to send the scheduled uplink signal, so that an error is caused, or the base station performs uplink scheduling by referring to the maximum propagation distance, and indicates the maximum uplink signal timing to the terminal, so that the uplink signal transmission efficiency is reduced.
Based on this, the technical solution provided in the embodiment of the present invention is to solve the problem that a base station reports and selects an uplink timing advance compensation to a base station when the base station indicates or agrees with a plurality of uplink timing advance compensations to the terminal, so that the base station can know the complete uplink timing compensation information of the terminal, ensure the correct uplink scheduling, and improve the uplink transmission efficiency. In the scheme, the terminal reports the uplink timing advance compensation information of the terminal to the base station in a mode of implicit indication in the random access process.
The following describes embodiments of the present invention with reference to the drawings.
In the description process, the implementation of the UE and the base station will be described separately, and then an example of the implementation of the UE and the base station in cooperation will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together or separately, and actually, when the UE and the base station are implemented separately, the UE and the base station solve the problems on the UE side and the base station side, respectively, and when the two are used in combination, a better technical effect is obtained.
Since the base station side and the UE side have a certain correspondence, the UE side will be mainly used for description in the description process, and the implementation of the base station side can be determined by a person skilled in the art by performing appropriate adjustment according to the implementation of the UE side.
In the implementation, the UE is mainly taken as a mobile communication terminal, a base station or an access point AP as an access device for illustration, because it is typical and is a technology being adopted and about to be adopted, so it is taken as an example here; however, as long as the communication device related to timing advance compensation can also adopt the technical solution provided by the embodiment of the present invention, the terminal described in the embodiment of the present invention refers to a terminal side product capable of supporting a communication protocol of a land mobile communication system, and a special communication Modem module (Wireless Modem) which can be integrated by various types of terminals such as a mobile phone, a tablet computer, and a data card to complete a communication function, and the UE, the base station, or the access point AP is only used for teaching a person skilled in the art how to implement the present invention specifically, but is not meant to be used only in the UE, the base station, or the access point AP, and the implementation process may be modified according to practical needs.
Fig. 1 is a timing advance compensation indication method on a terminal side, which is characterized by comprising:
and 102, the terminal determines the timing advance compensation required by sending the uplink signal, and selects a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to the first configuration information.
Fig. 2 is a method for determining timing advance compensation at a base station side, which is characterized by comprising:
step 202, the base station receives the detection leader sequence and the time frequency resource bearing the leader sequence, and determines the timing advance compensation of the terminal according to the first configuration information and the detection result.
The following description will be made mainly for the terminal, in steps.
A terminal acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH (Physical Random Access Channel) resource configuration and timing advance compensation when a Random Access process is initiated;
specifically, the terminal acquires first configuration information, where the first configuration information includes information related to PRACH resource configuration in a process of initiating random access.
The first configuration information includes a corresponding relationship between uplink timing advance compensation and PRACH resources. The terminal can select which PRACH resource to initiate random access according to the corresponding relationship and uplink timing advance compensation by acquiring the first configuration information.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
The following description will be made separately.
1. The first configuration information comprises grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value.
The first configuration information includes N (N is an integer greater than or equal to 1) groups of random access preamble sequence information, where a group of preamble sequences corresponds to an uplink timing advance compensation value, which may be shown in the following table:
table 1:
| grade | Uplink timing advance compensation | Preamble packet |
| 1 | Pre_TA 1 | Group 1 |
| 2 | Pre_TA 2 | Group 2 |
| 3 | Pre_TA 3 | Group 3 |
| … | … | … |
| N | Pre_TA N | Group N |
For example, when N is 2, when the UE determines that the timing advance compensation is Pre _ TA1, it initiates random access with the preamble sequences in group 1 in the preamble packet, and when the UE determines that the timing advance compensation is Pre _ TA2, it initiates random access with the preamble sequences in group 2 in the preamble packet.
In a specific implementation, when the preamble sequence is grouped, the method may further include:
if the load of a Physical Uplink Shared Channel (PUSCH) required to be sent due to triggering random access exceeds a set size, a packet where a preamble sequence is located is replaced, and when the packet where the preamble sequence corresponding to the timing advance compensation is located collides, the packet where the preamble sequence corresponding to the timing advance compensation is located is adjusted.
Optionally, when the preamble sequence of the random access has a packet, for example, the packet is divided into a group a and a group B, and when the PUSCH load required to be sent for triggering the random access exceeds a set size, the preamble sequence in the group B is selected to initiate the random access. In this way, the different timing advance offsets for the corresponding preamble packets are implemented in the existing random access preamble sequence packets to avoid preamble sequence selection collisions. Specifically, for example, it is assumed that the existing random access preamble sequences are grouped into a group a and a group B, and the preamble sequences in the group a and the group B are further divided into N groups, which correspond to N uplink timing advance compensation values, respectively, as shown in table 2 below.
Table 2:
for example, when N ═ 2, when the UE determines to select a preamble sequence in the preamble sequence group a, it initiates random access with the preamble sequence in the a1 th group in the preamble group if the timing advance backoff is Pre _ TA1, and with the preamble sequence in the a2 th group in the preamble group if the timing advance backoff is Pre _ TA 2.
2. The first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value.
The first configuration information includes N (N is an integer greater than or equal to 1) groups of random access opportunities (ROs), where a group of ROs corresponds to an uplink timing advance compensation value, as shown in table 3 below:
table 3:
the RO is used for bearing leader sequence time-frequency resources. When N is 2, the UE initiates random access with the preamble sequence in the group 1 in the RO packet when it determines that the timing advance compensation is Pre _ TA1, and initiates random access with the preamble sequence in the group 2 in the RO packet when it determines that the timing advance compensation is Pre _ TA 2.
In specific implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
Specifically, a specific implementation manner of the N RO packets may be to configure a time domain configuration index (e.g., PRACH-configuration index _ N, N is 1,2, …, N) of the N random access opportunities, where the PRACH-configuration index _ N (PRACH-configuration index _ N) corresponds to the nth timing backoff advance value. The time domain configuration index of the random access opportunity can determine a time slot position occupied by the random access opportunity in the time domain, a symbol position occupied by the random access opportunity in a time slot, and a symbol length occupied by a random access opportunity in the time domain, and a corresponding random access time domain configuration index can correspond to one or more RO resources in the time domain.
A specific implementation of the N RO packets may be a frequency domain configuration indication (e.g., Msg1-FDM _ N, N is 1,2, …, N) for configuring N random access opportunities, where Msg1-FDM _ N corresponds to the nth timing compensation advance value. The frequency domain configuration indication of the random access opportunity may determine a frequency domain position occupied by the random access opportunity in the frequency domain, and a corresponding one of the random access frequency domain configuration indications may correspond to one or more RO resources in the frequency domain.
In a specific implementation, the random access opportunity is configured by a random access period and a time domain and/or a frequency domain.
Specifically, a specific implementation manner of the N RO packets may be that, assuming that Z (Z is an integer greater than or equal to 1) ROs are included in one random access period according to the random access configuration information, and assuming that an RO resource corresponds to P time domain RO indexes and Q frequency domain RO indexes in one random access period, Z ═ P · Q and Z RO resources are divided into N groups, so taking the standard T38.321 as an example, one random access period may be one or more random access configuration periods (PRACH configuration periods) or one or more random access opportunity association periods (PRACH association periods) or one or more random access opportunity association pattern periods (PRACH association periods) defined in the standard (38.321).
In particular implementations, the random access opportunities are configured in time and/or frequency domain resources by group.
Specifically, a specific implementation manner of the N RO groups may be to divide the configured RO resources into N groups in the time domain.
For example, the allocated RO resource has a time domain index of T1T2T3T4 and a frequency domain index of F1F2, and the corresponding 8 RO resource indexes are (T1F1), (T1F2), (T2F1), (T2F2), (T3F1), (T3F2), (T4F1) and (T4F 2). The ROs are divided into two groups in the time domain, such as dividing the index T1T2 into one group, and T3T4 into one group, and the corresponding RO groups are (T1F1), (T1F2), (T2F1), (T2F2) in the first group, and (T3F1), (T3F2), (T4F1), (T4F2) in the second group.
A specific implementation manner of the N RO groups may be to divide the configured RO resources into N groups in the frequency domain. For example, the allocated RO resource has a time domain index of T1T2, a frequency domain index of F1F2F3F4, and corresponding to 8 RO resource indexes of (T1F1), (T1F2), (T1F3), (T1F4), (T2F1), (T2F2), (T2F3), and (T2F 4). The ROs are divided into two groups in the frequency domain, such as dividing the index F1F2 into one group, and F3F4 into one group, and the corresponding RO groups are (T1F1), (T1F2), (T1F3), (T1F4) in the first group, and (T2F1), (T2F2), (T2F3), (T2F4) in the second group.
In a specific implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
Specifically, when the random access is configured with two random access types, such as 4-step RACH (4-step random access) and 2-step RACH (2-step random access), if the 4-step RACH and the 2-step RACH adopt different RO configurations, for example, different random access time domain configuration indexes are adopted. In this feature, the RO packets corresponding to the different timing advance compensations are implemented in the RO configurations corresponding to the random access types, so that the RO configurations corresponding to the different random access types correspond to different uplink timing advance compensations based on the RO packets. Specifically, for example, assume that there are 4-step RACH RO packets and 2-step RACH RO packets, which correspond to N uplink timing advance backoff values, respectively, as shown in table 4 below.
Table 4:
for example, when N is 2, when the UE determines that the 4-step RACH initiates random access, it initiates random access using the RO bearer preamble sequence in the a1 th group of the 4-step RACH RO packet if the timing advance backoff is Pre _ TA1, and initiates random access using the RO bearer preamble sequence in the a2 th group of the 4-step RACH RO packet if the timing advance backoff is Pre _ TA 2.
3. The first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
The first configuration information includes N (N is an integer greater than or equal to 1) sets of SSBs (Synchronization Signal Block), where one set of SSBs corresponds to an uplink timing advance compensation value, as shown in table 5 below:
table 5:
the SSB includes a primary synchronization signal, a broadcast signal, and a secondary synchronization signal, and corresponds to an SSB time-frequency resource or a beam. For example, when N is 2, when the UE determines that the timing advance backoff is Pre _ TA1, it initiates random access using the SSB-associated random access resources in group 1 in the SSB packet, and when the UE determines that the timing advance backoff is Pre _ TA2, it initiates random access using the SSB-associated random access resources in group 2 in the SSB packet.
In specific implementation, the method may further include:
if the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
Specifically, the terminal does not want different timing advances to compensate for the position conflict between corresponding preamble sequence identifications or ROs or SSB indexes. If the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
Fig. 3 is a schematic diagram of a collision, and as shown in fig. 3, when the preamble sequence identifiers or ROs or SSBs corresponding to the timing advance compensations Pre _ TA1 and Pre _ TA2 collide with each other, the preamble sequence identifiers or ROs or the timing advance compensations corresponding to the SSBs in the collision area are smaller or larger than the preamble sequence identifiers or ROs or SSBs corresponding to Pre _ TA 2.
In an implementation, the first configuration information is sent by the base station to the terminal, and/or is written to the UE according to a protocol agreement.
Specifically, the manner in which the terminal acquires the first configuration information may be that the base station sends the first configuration information to the terminal, or writes the first configuration information according to a protocol agreement device, or acquires the first configuration information in a manner combining the above manners.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
Specifically, the Uplink timing advance compensation includes timing advance compensation for Uplink transmission signals including a preamble sequence, a PUCCH (Physical Uplink Control Channel), a PUSCH, and the like.
In practical applications, the uplink timing advance compensation can be implemented on the terminal side or on the base station side. For example, assuming that the uplink timing advance compensation is Pre _ TA, the total timing advance compared to the downlink timing when transmitting the uplink signal to the terminal is achieved at the terminal side is Pre _ TA, NTA(base station indication timing advance) and NTA,offsetIf the sum is present, the base station side receives the uplink signal according to the original uplink timing. The realization of sending the uplink signal for the terminal at the base station side is NTA(base station indication timing advance) and NTA,offsetIf the sum is available, the uplink timing of the base station side is deviated from the downlink timing by one Pre _ TA to receive the uplink signal of which the uplink timing compensation is corresponding to the Pre _ TA.
And secondly, the terminal determines the timing advance compensation required by sending the uplink signal, and selects a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to the first configuration information.
Specifically, the terminal determines the timing advance compensation required for sending the uplink signal, and selects the preamble sequence corresponding to the timing advance compensation and the time-frequency resource carrying the preamble sequence to send the preamble sequence according to the first configuration information.
The terminal determines the timing advance compensation required for sending the uplink signal, and the corresponding mode can be determined according to the propagation delay between the terminal and the base station or between the terminal and the reference position, or determined in a measured mode such as SSB. For example, if the determined required timing advance compensation amount is Pre _ TA _ corrected, one of the N timing advance compensations that is closest to the Pre _ TA _ corrected size or one of the timing advance compensations that is smaller than the Pre _ TA _ corrected size is selected as the timing advance compensation. For another example, the terminal measures the SSBs, selects one SSB satisfying the random access condition, and uses the timing advance compensation corresponding to the SSB as the timing advance compensation.
The terminal further combines the first configuration information to select the RO and the leader sequence corresponding to the random access and send a random access signal.
If the first configuration information contains the leader sequence group, when the UE determines that the selected timing advance compensates the leader sequence group, the UE transmits the random access signal by adopting the leader sequence in the leader sequence group.
If the first configuration information contains the RO packet, when the UE determines that the selected timing advance compensates the RO packet, the UE transmits the random access signal by adopting the RO bearing leader sequence.
If the first configuration information contains the SSB packet, when the UE determines that the SSB packet where the timing advance compensation is located is selected by the UE, the random access signal is sent by adopting the RO and the leader sequence associated with the SSB.
Correspondingly, the embodiment of the present invention also provides a processing scheme at the base station side, which is explained below.
Firstly, a base station acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
specifically, the base station obtains first configuration information, where the first configuration information includes information related to PRACH resource configuration in a process of initiating random access.
The first configuration information may refer to implementation of the UE, and is not described in detail.
The manner in which the base station acquires the first configuration information may be obtained by writing in the device or by sending from another network device.
And secondly, the base station receives the detection leader sequence and the time frequency resource bearing the leader sequence, and determines the timing advance compensation of the terminal according to the first configuration information and the detection result.
Specifically, the base station receives the detection leader sequence according to the first configuration information, and identifies the timing advance compensation information of the terminal according to the detection result.
If the first configuration information includes a preamble sequence, if the base station detects the preamble sequence in the nth (N ═ 1,2, …, N) group, the timing advance of the corresponding terminal is compensated to be Pre _ TA N;
if the first configuration information contains RO, such as the base station detects a preamble sequence carried by RO in the nth (N ═ 1,2, …, N) group, the timing advance of the corresponding terminal is compensated to Pre _ TA N;
if the first configuration information includes an SSB, e.g., the base station identifies an nth (N ═ 1,2, …, N) group of corresponding SSB indexes in the SSB packet through preamble sequence detection, the timing advance of the corresponding terminal is compensated to be Pre _ TA N.
In the implementation, the method can further comprise the following steps:
and the base station acquires the complete timing advance information of the terminal by combining the timing advance indication given to the terminal and schedules the uplink transmission resource for the terminal according to the timing advance information.
Specifically, after the base station identifies the terminal timing advance compensation information, the base station may obtain the complete timing advance information of the terminal by combining the timing advance indication given to the terminal, and schedule the uplink transmission resource for the terminal according to the timing advance information.
Based on the same inventive concept, the embodiment of the present invention further provides a base station side device, a terminal, a timing advance compensation indicating device, a timing advance compensation determining device, and a computer readable storage medium, and because the principles of solving the problems of these devices are similar to those of the methods, the implementation of these devices can refer to the implementation of the timing advance compensation indicating method and the timing advance compensation determining method, and repeated details are omitted.
When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.
Fig. 4 is a schematic structural diagram of a terminal, as shown in the figure, including:
the processor 400, which is used to read the program in the memory 420, executes the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
determining timing advance compensation required by sending an uplink signal, and selecting a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to first configuration information;
a transceiver 410 for receiving and transmitting data under the control of the processor 400.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In an implementation, when the preamble sequence is grouped, the method further includes:
and if the PUSCH load needing to be sent due to the triggering of the random access exceeds the set size and the group where the leader sequence is located is replaced, when the PUSCH load and the group where the leader sequence corresponding to the timing advance compensation are in conflict, adjusting the group where the leader sequence corresponding to the timing advance compensation is located.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the method further comprises the following steps:
if the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
In an implementation, the first configuration information is sent by the base station to the terminal, and/or is written to the UE according to a protocol agreement.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
Where in fig. 4, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors, represented by processor 400, and memory, represented by memory 420, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 410 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 430 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 400 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 400 in performing operations.
The embodiment of the invention provides a timing advance compensation indicating device, which comprises:
a terminal acquisition module, configured to acquire first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the terminal sending module is used for determining the timing advance compensation required by sending the uplink signal, and selecting the leader sequence corresponding to the timing advance compensation and the time-frequency resource bearing the leader sequence to send the leader sequence according to the first configuration information.
Specific implementations can be found in the implementation of the timing advance compensation indication method.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.
Fig. 5 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:
the processor 500, which is used to read the program in the memory 520, executes the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
receiving a detection leader sequence and a time frequency resource bearing the leader sequence, and determining timing advance compensation of the terminal according to the first configuration information and the detection result;
a transceiver 510 for receiving and transmitting data under the control of the processor 500.
In implementation, the first configuration information includes grouped leader sequences, and a group of leader sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
In implementation, the random access opportunity is a time domain configuration index for identifying a time slot position correspondingly occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity in a time slot, or a symbol length occupied by the random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
In an implementation, the random access opportunity is configured for a time domain and/or a frequency domain by a random access period.
In an implementation, the random access opportunities are configured time and/or frequency domain resources by group.
In implementation, the first configuration information includes grouped random access opportunities, and a group of random access opportunities corresponds to an uplink timing advance compensation value of one random access type.
In an implementation, the first configuration information is written to the base station according to a protocol convention.
In an implementation, the timing advance compensation is performed on one or a combination of the following uplink transmission signals:
preamble sequence, PUCCH, PUSCH.
In an implementation, the method further comprises the following steps:
and combining the timing advance indication given to the terminal to obtain the complete timing advance information of the terminal, and scheduling uplink transmission resources for the terminal according to the timing advance information.
Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 500, and various circuits, represented by memory 520, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.
The embodiment of the invention provides a timing advance compensation determining device, which comprises:
a base station obtaining module, configured to obtain first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the base station receiving module is used for receiving the detection leader sequence and the time-frequency resource bearing the leader sequence and determining the timing advance compensation of the terminal according to the first configuration information and the detection result.
Specific implementations can be found in the implementation of the timing advance compensation determination method.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.
The embodiment of the invention provides a computer-readable storage medium, which is characterized in that the computer-readable storage medium stores a computer program for executing the timing advance compensation indication method and/or the timing advance compensation determination method.
Specific implementations can be found in implementations of the timing advance compensation indication method and/or the timing advance compensation determination method.
In summary, the present invention provides a scheme for reporting uplink timing advance, in which a terminal reports uplink timing advance compensation information of the terminal to a base station through a method of implicit indication in a random access process.
Therefore, the base station can acquire the complete uplink timing compensation information of the terminal, ensure the correct uplink scheduling and improve the uplink transmission efficiency.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for timing advance compensation indication, comprising:
a terminal acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
and the terminal determines the timing advance compensation required by sending the uplink signal, and selects a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to the first configuration information.
2. The method of claim 1, wherein the first configuration information includes grouped preamble sequences, and a group of preamble sequences corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information comprises grouped random access opportunities, and one group of random access opportunities corresponds to an uplink timing advance compensation value; or the like, or, alternatively,
the first configuration information includes grouped synchronous broadcast blocks, and a group of synchronous broadcast blocks corresponds to an uplink timing advance compensation value.
3. The method of claim 2, wherein the random access opportunity is identified by a time domain configuration index as a slot position occupied by the random access opportunity in a time domain, a symbol position occupied by the random access opportunity within one slot, or a symbol length occupied by one random access opportunity in the time domain; and/or the presence of a gas in the gas,
the random access opportunity is a frequency domain configuration index used for identifying the frequency domain position occupied by the random access opportunity in the frequency domain.
4. The method of claim 2, further comprising:
if the leading sequence identifications corresponding to different timing advance compensations have conflict, or if the position conflict between the random access opportunity ROs corresponding to different timing advance compensations occurs, or if the SSB indexes corresponding to different timing advance compensations have conflict, the leading sequence identification of the conflict area or the timing advance compensation corresponding to the RO or the SSB index is the minimum value or the maximum value in the timing advance compensation corresponding to the RO.
5. A method for timing advance compensation determination, comprising:
a base station acquires first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
and the base station receives the detection leader sequence and the time-frequency resource bearing the leader sequence, and determines the timing advance compensation of the terminal according to the first configuration information and the detection result.
6. A terminal, comprising:
a processor for reading the program in the memory, performing the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
determining timing advance compensation required by sending an uplink signal, and selecting a preamble sequence corresponding to the timing advance compensation and a time-frequency resource bearing the preamble sequence to send the preamble sequence according to first configuration information;
a transceiver for receiving and transmitting data under the control of the processor.
7. A base station, comprising:
a processor for reading the program in the memory, performing the following processes:
acquiring first configuration information, wherein the first configuration information comprises a corresponding relation between PRACH resource configuration and timing advance compensation when a random access process is initiated;
receiving a detection leader sequence and a time frequency resource bearing the leader sequence, and determining timing advance compensation of the terminal according to the first configuration information and the detection result;
a transceiver for receiving and transmitting data under the control of the processor.
8. A timing advance compensation indicating device, comprising:
a terminal acquisition module, configured to acquire first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the terminal sending module is used for determining the timing advance compensation required by sending the uplink signal, and selecting the leader sequence corresponding to the timing advance compensation and the time-frequency resource bearing the leader sequence to send the leader sequence according to the first configuration information.
9. A timing advance compensation determining apparatus, comprising:
a base station obtaining module, configured to obtain first configuration information, where the first configuration information includes a correspondence between PRACH resource configuration and timing advance compensation when a random access procedure is initiated;
and the base station receiving module is used for receiving the detection leader sequence and the time-frequency resource bearing the leader sequence and determining the timing advance compensation of the terminal according to the first configuration information and the detection result.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 5.
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| PCT/CN2020/133268 WO2021243988A1 (en) | 2020-06-02 | 2020-12-02 | Indication and determination method, device, and apparatus for timing advance compensation, and medium |
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| CN108738134A (en) * | 2017-04-13 | 2018-11-02 | 普天信息技术有限公司 | A kind of time division multiplexing random access resource selection method |
| CN108811160A (en) * | 2017-04-27 | 2018-11-13 | 普天信息技术有限公司 | A kind of the accidental access signal sending method and device of multi-sub-band system |
| CN110971374B (en) * | 2018-09-29 | 2022-05-31 | 展讯通信（上海）有限公司 | Configuration method, transmission method and device for uplink physical channel transmission time |
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