CN109842945B - Method and device for detecting PRACH (physical random Access channel) preamble sequence - Google Patents
Method and device for detecting PRACH (physical random Access channel) preamble sequence Download PDFInfo
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Abstract
The embodiment of the invention provides a method and a device for detecting a PRACH leader sequence; the base station is connected with User Equipment (UE) through a cell, and the method comprises the following steps: the base station sends broadcast information to the UE via the cell; the base station judges whether the number of PRACH leader sequences in the same sending period is greater than a preset sequence number threshold value or not; wherein the transmission period is predetermined by the PRACH configuration parameter; when the number of the PRACH leader sequences is not greater than a preset sequence number threshold, the base station acquires PRACH configuration parameters of the cell; when a base station receives a leader sequence sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequence; time domain positions corresponding to the PRACH configuration parameters are different; the base station outputs a detection result; the consumption of FPGA resources in PRACH preamble sequence detection can be effectively reduced, and the random access user capacity and the detection success rate are effectively ensured.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting a PRACH preamble sequence.
Background
In the Random Access process of TD-LTE (Time Division Long Term Evolution), PRACH (Physical Random Access Channel) preamble sequence detection is a first step of a UE (User Equipment) contacting a base station, and the base station can obtain information such as Time offset of the UE through a detection result; in the current FPGA (Field-Programmable Gate Array) scheme, in order to ensure the random access of UEs in each cell, each cell occupies independent FPGA processing resources and an independent configuration scheme, referring to fig. 1, a schematic diagram of a PRACH preamble sequence detection scheme in the prior art is shown, where an antenna of each cell is connected to a PRACH preamble sequence detection component, and then outputs a corresponding detection result; in the existing detection scheme, FPGA resources of each cell are independent, so that a large amount of resources are consumed.
Especially in the case of multiple antennas, FPGA resources increase as the number of antennas increases. In Massive MIMO (Multiple-Input Multiple-Output), the number of antennas is large and the consumption of resources is also large.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting a PRACH leader sequence, which aim to solve the problem that the existing FPGA resource is independent, so that a large amount of resources are wasted.
In order to solve the above problems, an embodiment of the present invention discloses a method for detecting a PRACH preamble sequence of a physical random access channel, which is applied to a base station, wherein the base station includes a plurality of cells, and the base station is connected to a user equipment UE through the cells, and the method includes:
the base station sends broadcast information to the UE via the cell; wherein the broadcast information comprises PRACH configuration parameters;
the base station judges whether the number of PRACH leader sequences in the same sending period is greater than a preset sequence number threshold value or not; wherein the transmission period is predetermined by the PRACH configuration parameter;
when the number of the PRACH leader sequences is not greater than a preset sequence number threshold, the base station acquires PRACH configuration parameters of the cell;
when a base station receives a leader sequence sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequence; time domain positions corresponding to the PRACH configuration parameters are different;
and the base station outputs a detection result.
Preferably, before the step of the base station sending the broadcast information to the UE via the cell, the method further includes:
the base station allocates a cyclic shift sequence Ncs parameter to the cell;
and the base station determines the PRACH configuration parameters of the cell according to the Ncs parameters.
Preferably, the step of determining, by the base station, the PRACH configuration parameters of the cell according to the Ncs parameter includes:
the base station acquires a Field Programmable Gate Array (FPGA) processing time parameter according to the Ncs parameter;
and the base station determines the PRACH configuration parameters of the cell according to the FPGA processing time parameters.
Preferably, the step of obtaining the FPGA time parameter according to the Ncs parameter includes:
establishing a mapping relation between the Ncs parameter and the FPGA time parameter;
and inquiring according to the mapping relation to obtain the FPGA time parameter corresponding to the Ncs parameter.
The embodiment of the invention also discloses a detection method of the PRACH leader sequence of the physical random access channel, which is applied to User Equipment (UE), wherein the UE is connected with a base station through a cell, and the method comprises the following steps:
the UE receives broadcast information from the cell; wherein the broadcast information includes the PRACH configuration parameters and a cyclic shift sequence Ncs parameter;
the UE generates a PRACH leader sequence by adopting the Ncs parameter;
the UE sends the PRACH leader sequence to a base station through a cell according to a sending period; wherein the transmission period is predetermined by the PRACH configuration parameter.
Preferably, the step of generating, by the UE, a PRACH preamble sequence using the Ncs parameter includes:
the UE calculates a root sequence by adopting the Ncs parameter;
and the UE generates a PRACH leader sequence according to the root sequence.
The embodiment of the invention also discloses a detection device of the PRACH leader sequence of the physical random access channel, which is applied to a base station, wherein the base station comprises a plurality of cells, the base station is connected with User Equipment (UE) through the cells, and the device comprises:
a broadcast information sending module, configured to send, by the base station, broadcast information to the UE via the cell; wherein the broadcast information comprises PRACH configuration parameters;
a judging module, configured to judge, by the base station, whether the number of PRACH preamble sequences in the same transmission period is greater than a preset sequence number threshold; wherein the transmission period is predetermined by the PRACH configuration parameter;
an obtaining module, configured to, when the number of PRACH preamble sequences is not greater than a preset sequence number threshold, obtain, by the base station, PRACH configuration parameters of the cell;
the detection module is used for detecting the PRACH leader sequence when the base station receives the leader sequence sent by the UE at the time domain position corresponding to the PRACH configuration parameters; time domain positions corresponding to the PRACH configuration parameters are different;
and the output module is used for outputting the detection result by the base station.
Preferably, the module connected to the broadcast information sending module further includes:
an allocating module, configured to allocate the cyclic shift sequence Ncs parameter to the cell by the base station;
and a configuration parameter determining module, configured to determine, by the base station, PRACH configuration parameters of the cell according to the Ncs parameter.
Preferably, the configuration parameter determination module includes:
the processing time parameter obtaining submodule is used for obtaining a Field Programmable Gate Array (FPGA) processing time parameter by the base station according to the Ncs parameter;
and the configuration parameter determining submodule is used for determining the PRACH configuration parameters of the cell by the base station according to the FPGA processing time parameters.
Preferably, the processing time parameter obtaining sub-module includes:
the mapping relation establishing unit is used for establishing a mapping relation between the Ncs parameter and the FPGA time parameter;
and the query unit is used for querying and obtaining the FPGA time parameter corresponding to the Ncs parameter according to the mapping relation.
The embodiment of the invention also discloses a detection device of the PRACH leader sequence of the physical random access channel, which is applied to User Equipment (UE), wherein the UE is connected with a base station through a cell, and the device comprises:
a broadcast information receiving module, configured to receive, by the UE, broadcast information from the cell; wherein the broadcast information includes the PRACH configuration parameters and a cyclic shift sequence Ncs parameter;
a sequence generation module, configured to generate a PRACH preamble sequence by the UE using the Ncs parameter;
a sequence sending module, configured to send, by the UE, the PRACH preamble sequence to a base station via a cell according to a sending period; wherein the transmission period is predetermined by the PRACH configuration parameter.
Preferably, the sequence generating module includes:
a root sequence calculation submodule, configured to calculate a root sequence by using the Ncs parameter by the UE;
and the sequence generation submodule is used for generating the PRACH leader sequence by the UE according to the root sequence.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, a base station sends broadcast information to UE through the cell; the method comprises the steps that broadcast information comprises Physical Random Access Channel (PRACH) configuration parameters, a base station judges whether the number of PRACH preamble sequences in the same transmission period is larger than a preset sequence number threshold or not, wherein the transmission period is predetermined by the PRACH configuration parameters, and when the number of the PRACH preamble sequences is not larger than the preset sequence number threshold, the base station acquires the PRACH configuration parameters of a cell; when a base station receives a leader sequence sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequence, and outputting a detection result by the base station; time domain positions corresponding to the PRACH configuration parameters are different; in the core concept of the embodiment of the present invention, because the time domain positions occupied by the PRACH configuration parameters are different, the PRACH configuration parameters are allocated for all cells, the UE connected to the cell sends a PRACH preamble sequence to the base station according to the PRACH time domain positions, and allocates cell user data to different detection components of the base station according to different PRACH time domain positions, so as to implement time division multiplexing of different FPGA detection resources, and in a low-density wide-coverage scenario, a high Ncs (Number of cyclic shift sequence) value can be used, thereby increasing the time delay redundancy of detection, improving the success rate of detection, and in a hot-spot high-capacity small-coverage scenario, a low Ncs value can be used, the detection duration of the PRACH preamble sequence can be shortened, and the Number of random access users can be increased; the consumption of FPGA resources in PRACH preamble sequence detection can be effectively reduced, and the random access user capacity and the detection success rate are effectively ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts
Figure 1 is a schematic diagram of a PRACH preamble sequence detection scheme of the prior art;
fig. 2 is a flowchart illustrating a first step of a method for detecting a PRACH preamble sequence according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a PRACH preamble sequence detection scheme according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a second step of a method for detecting a PRACH preamble sequence according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a third step of a method for detecting a PRACH preamble sequence according to an embodiment of the present invention;
fig. 6 is a block diagram of a fourth embodiment of a PRACH preamble sequence detection apparatus according to an embodiment of the present invention;
fig. 7 is a block diagram of a fifth embodiment of a PRACH preamble sequence detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the embodiments of the present invention more clearly apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, a flowchart of a first step of a method for detecting a PRACH preamble sequence according to an embodiment of the present invention is shown, and is applied to a base station, where the base station includes multiple cells, and the base station is connected to a user equipment UE through the cells, and specifically includes the following steps:
in the embodiment of the invention, in the random access process of the UE and the base station, a cell corresponding to the base station firstly sends broadcast information to the UE, wherein the broadcast information can comprise PRACH configuration parameters; the PRACH configuration parameters may be preset at the base station side, and specifically, the PRACH configuration parameters may be obtained from an Ncs parameter by an FPGA processing time parameter, and the base station determines the PRACH configuration parameters according to the FPGA processing time parameter, where the FPGA processing time parameter is a time length required for detecting a PRACH preamble sequence.
The Ncs parameter is used as input data, FPGA processing time parameters can be determined through testing of simulation software, the number of root sequences required by different Ncs parameters is different, the FPGA processing time parameters are larger as the number of root sequences is larger, time domain position intervals corresponding to PRACH configuration parameters are larger than the FPGA processing time parameters, and therefore the success rate of PRACH preamble sequence detection can be guaranteed.
Referring to table 1, a table of PRACH configuration parameters according to an embodiment of the present invention is shown; as shown in the table, the PRACH configuration parameters may include a PRACH configuration number, a density of every 10ms, and a PRACH time domain position, and the base station may allocate the PRACH configuration parameters to multiple cells according to the PRACH configuration number, and a UE connected to the cell may send a PRACH preamble sequence to the base station according to the PRACH time domain position, and start a random access procedure.
Table 1: PRACH configuration parameters
In practice, after determining the PRACH configuration parameters, the base station configures the PRACH configuration parameters into broadcast information of a cell, and after receiving the broadcast information, the UE configures a PRACH preamble sequence using the PRACH configuration parameters in the broadcast information, and sends the PRACH preamble sequence at different time domain positions on a subframe.
It should be noted that the PRACH configuration parameter described above is only an example of the embodiment of the present invention, and those skilled in the art may set the PRACH configuration parameter according to different formats (format 2, format 3, and the like), different transmission period settings, and different subframe locations, and other changes to the PRACH configuration parameter fall within the protection scope of the present invention as long as the change does not depart from the core concept of the present invention.
102, the base station judges whether the number of PRACH preamble sequences in the same sending period is larger than a preset sequence number threshold value; wherein the transmission period is predetermined by the PRACH configuration parameter;
specifically, in the embodiment of the present invention, after receiving broadcast information including PRACH configuration parameters, the UE sends a PRACH preamble sequence generated using a root sequence to the base station, and the base station receives the PRACH preamble sequence via a cell antenna, so as to perform the next operation.
In the embodiment of the invention, a base station can receive PRACH leader sequences of different sending periods; dividing PRACH leader sequences according to sending periods to obtain the number of PRACH leader sequences in different sending periods;
further, the base station may determine whether the number of PRACH preamble sequences in the same period is greater than a preset sequence number threshold, and if so, indicate that the number of PRACH preamble sequences processed at the same time has exceeded the number of FPGA processing resources, and the base station returns to the step of sending broadcast information to the UE.
It should be noted that the preset sequence number threshold may be any value set by a person skilled in the art according to the size of the base station processing resource, and the embodiment of the present invention does not specifically limit this.
103, when the number of the PRACH leader sequences is not greater than a preset sequence number threshold, the base station acquires PRACH configuration parameters of the cell;
specifically, when the base station determines that the number of the PRACH preamble sequences is not greater than the threshold of the preset number of sequences, the base station may obtain PRACH configuration parameters of the cell of the base station, where it is to be noted that the number of the cells may be multiple, but is not limited in this embodiment of the present invention.
104, when a base station receives a leader sequence sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequence; time domain positions corresponding to the PRACH configuration parameters are different;
in practical application, in the embodiment of the present invention, when the base station determines that the number of the PRACH preamble sequences in the same period is not greater than the threshold of the preset sequence number, that is, the number of the PRACH preamble sequences in the same period is less than or equal to the threshold of the preset sequence number, it indicates that the base station has sufficient FPGA processing resources to detect the PRACH preamble sequence, and at this time, if the base station receives the preamble sequence sent by the UE at the time domain position corresponding to the PRACH configuration parameter, the base station detects the PRACH preamble sequence.
Furthermore, the time domain positions corresponding to the PRACH configuration parameters are different, the base station receives the PRACH preamble sequence sent by the UE through the cell antenna, the PRACH preamble sequence received at the different time domain positions corresponding to the PRACH configuration parameters is allocated to the PRACH preamble sequence detection component for detection, and then the cell detection result is output.
It should be noted that, in the embodiment of the present invention, a detection algorithm for detecting a PRACH preamble sequence may be based on a fixed power detection algorithm, or may be based on a noise estimation detection algorithm, and the embodiment of the present invention does not specifically limit the type of the detection algorithm.
And 105, outputting the detection result by the base station.
Specifically, in the embodiment of the present invention, when the base station receives the preamble sequence sent by the UE at the time domain position corresponding to the PRACH configuration parameters, the PRACH preamble sequence is detected, and the base station outputs a detection result, that is, determines the several cyclic shift sequences generated by the root sequence of the received PRACH preamble sequence;
referring to fig. 3, a schematic diagram of a PRACH preamble sequence detection scheme according to an embodiment of the present invention is shown; a base station receives PRACH leader sequences sent by UE according to different time domain positions in PRACH configuration parameters through a cell antenna, an input judgment component distributes the received PRACH leader sequences to a PRACH leader sequence detection component for detection, and an output judgment component outputs a cell detection result;
the input decision component of the base station may be configured to allocate PRACH preamble sequences to different PRACH preamble sequence detection components, and may also be configured to determine whether the number of PRACH preamble sequences in the same transmission period is greater than a preset sequence number threshold, where the PRACH preamble sequence detection component is configured to detect a PRACH preamble sequence, and the output decision component is configured to output a detection result of a cell.
In the embodiment of the invention, a base station sends broadcast information to UE through the cell; the method comprises the steps that broadcast information comprises Physical Random Access Channel (PRACH) configuration parameters, a base station judges whether the number of PRACH preamble sequences in the same transmission period is larger than a preset sequence number threshold or not, wherein the transmission period is predetermined by the PRACH configuration parameters, and when the number of the PRACH preamble sequences is not larger than the preset sequence number threshold, the base station acquires the PRACH configuration parameters of a cell; when a base station receives a leader sequence sent by the UE at a time domain position corresponding to PRACH configuration parameters, detecting the PRACH leader sequence, wherein the time domain positions corresponding to the PRACH configuration parameters are different; the base station outputs a detection result; in the embodiment of the invention, the consumption of FPGA resources in PRACH preamble sequence detection can be effectively reduced, and the random access user capacity and the detection success rate are effectively ensured.
Referring to fig. 4, a flowchart illustrating a step of a second method for detecting a PRACH preamble sequence according to an embodiment of the present invention is applied to a base station, where the base station includes multiple cells, and the base station is connected to a user equipment UE through the cells, and specifically includes the following steps:
in the embodiment of the present invention, the base station allocates the Ncs parameter to the cell to which the base station belongs, and sends the Ncs parameter to the UE through the broadcast information of the cell.
further, the step of the base station determining the PRACH configuration parameters of each cell according to the Ncs parameter includes the following substeps:
substep S2021, the base station obtains FPGA processing time parameters according to the Ncs parameters;
and substep S2022, the base station determines PRACH configuration parameters of the cell according to the FPGA processing time parameters.
Specifically, the base station acquires an FPGA processing time parameter according to the Ncs parameter, and determines PRACH configuration parameters of the cell according to the FPGA processing time parameter, that is, different time domain positions of the PRACH sequence in a subframe are determined according to the FPGA processing time parameter.
Preferably, the step of obtaining the FPGA time parameter according to the Ncs parameter includes the following substeps:
substep S20211, establishing a mapping relationship between the Ncs parameter and the FPGA time parameter;
and a substep S20212, obtaining the FPGA time parameter corresponding to the Ncs parameter according to the mapping relation query.
In the embodiment of the invention, the mapping relation between the Ncs parameter and the FPGA time parameter is established in a software simulation mode, and the FPGA time parameter corresponding to the Ncs parameter is obtained by inquiring according to the mapping relation.
in the embodiment of the invention, a cell corresponding to a base station firstly sends broadcast information to UE, wherein the broadcast information can comprise PRACH configuration parameters; the PRACH configuration parameters may be obtained by pre-calculation at the base station side, and specifically, the PRACH configuration parameters may obtain FPGA processing time parameters from Ncs parameters; and the base station determines the PRACH configuration parameters of the cell according to the FPGA processing time parameters, wherein the FPGA processing time parameters are the time length required for detecting the PRACH leader sequence.
Specifically, after receiving the broadcast information including the PRACH configuration parameters, the UE may send a PRACH preamble sequence generated by using the root sequence.
because the time domain position in the PRACH configuration parameter has already determined the sending period of the PRACH preamble sequence in the UE, the base station only needs to judge whether the number of the PRACH preamble sequence in the same sending period is greater than the threshold of the number of preset sequences, and when the number of the PRACH preamble sequence is greater than the threshold of the number of preset sequences, the base station returns to the step of sending the broadcast information to the UE.
In a preferred embodiment of the present invention, the preset sequence number threshold may be the number of PRACH preamble sequence detection components.
in practical application to the embodiment of the present invention, when the base station determines that the number of the PRACH preamble sequences is not greater than the threshold of the preset number of sequences, the base station may obtain PRACH configuration parameters of the cell of the base station, where it is to be noted that the number of the cells may be multiple, but is not limited in this embodiment of the present invention.
in the embodiment of the present invention, when the base station determines that the number of PRACH preamble sequences in the same period is not greater than the preset sequence number threshold, that is, the number of PRACH preamble sequences in the same period is less than or equal to the preset sequence number threshold, it indicates that the base station has sufficient FPGA processing resources to detect the PRACH preamble sequences, and at this time, if the base station receives the preamble sequences sent by the UE at the time domain positions corresponding to the PRACH configuration parameters, the base station detects the PRACH preamble sequences, where the time domain positions corresponding to the PRACH configuration parameters are different from each other, and detailed configuration conditions refer to table 1.
Specifically, in the embodiment of the present invention, when the base station determines that the number of the PRACH preamble sequences is not greater than the threshold of the number of the preset sequences, the PRACH preamble sequences are detected, and the base station outputs a detection result.
In the embodiment of the invention, a base station distributes Ncs parameters to the cells, the base station determines PRACH configuration parameters of the cells according to the Ncs parameters, and the base station sends broadcast information to the UE through the cells; the broadcast information comprises PRACH configuration parameters, the base station receives PRACH leader sequences sent by the UE, and the base station judges whether the number of the PRACH leader sequences in the same sending period is greater than a preset sequence number threshold value or not; the sending period is predetermined by the PRACH configuration parameters, and the base station acquires the PRACH configuration parameters of the cell when the number of the PRACH leader sequences is not greater than a preset sequence number threshold; when a base station receives a leader sequence sent by the UE at a time domain position corresponding to PRACH configuration parameters, detecting the PRACH leader sequence, wherein the time domain positions corresponding to the PRACH configuration parameters are different; the base station outputs the detection result, thereby effectively reducing the consumption of FPGA resources in PRACH preamble sequence detection, and also effectively ensuring the random access user capacity and the detection success rate under different access user density and coverage scenes.
Referring to fig. 5, a flowchart illustrating a third step of the method for detecting a PRACH preamble sequence according to the embodiment of the present invention is applied to a UE, where the UE is connected to a base station through a cell, and the method specifically includes the following steps:
in the embodiment of the invention, the UE receives broadcast information sent by a base station through a cell, and the UE transmits the broadcast information to the base station through the cell
The broadcast information may include PRACH configuration parameters and Ncs parameters, the PRACH configuration parameters may include a PRACH configuration sequence number, density every 10ms, and a PRACH time domain position, and the PRACH time domain position determines a transmission period of a PRACH preamble sequence.
specifically, in the embodiment of the present invention, when receiving the Ncs parameter in the broadcast information, the UE calculates the root sequence using the Ncs parameter, and then the root sequence generates the PRACH preamble sequence through cyclic shift; the root sequence may be a Zadoff-Chu sequence.
Preferably, the step of generating the PRACH preamble sequence by the UE using the Ncs parameter includes the following sub-steps:
a substep S3021, in which the UE calculates a root sequence using the Ncs parameter;
and a substep S3022, in which the UE generates a PRACH preamble sequence according to the root sequence.
In the embodiment of the invention, after the PRACH leader sequence is generated, the UE sends the PRACH leader sequence to the base station through the cell according to the sending period predetermined by the PRACH configuration parameters.
In the embodiment of the invention, UE receives broadcast information from the cell, wherein the broadcast information comprises the PRACH configuration parameter and the Ncs parameter, the UE adopts the Ncs parameter to generate a PRACH leader sequence, and the UE sends the PRACH leader sequence to a base station through the cell according to a sending period; the sending period is predetermined by the PRACH configuration parameters, so that the consumption of FPGA resources in PRACH preamble sequence detection can be effectively reduced, and the random access user capacity and the detection success rate can be effectively ensured under different access user densities and coverage scenes.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 6, a block diagram of a fourth embodiment of a PRACH preamble sequence detection apparatus according to an embodiment of the present invention is shown, and is applied to a base station, where the base station includes multiple cells, and the base station is connected to a user equipment UE through the cells, and specifically includes the following modules:
a broadcast information sending module 401, configured to send, by the base station, broadcast information to the UE via the cell; the broadcast information comprises PRACH configuration parameters;
a determining module 402, configured to determine, by the base station, whether the number of PRACH preamble sequences in the same transmission period is greater than a preset sequence number threshold; wherein the transmission period is predetermined by the PRACH configuration parameter;
an obtaining module 403, configured to, when the number of the PRACH preamble sequences is not greater than a preset sequence number threshold, obtain, by the base station, PRACH configuration parameters of the cell;
a detection module 404, configured to detect, when a base station receives a preamble sequence sent by the UE at a time domain position corresponding to a PRACH configuration parameter, the PRACH preamble sequence; time domain positions corresponding to the PRACH configuration parameters are different;
an output module 405, configured to output the detection result by the base station.
Preferably, the module connected to the broadcast information sending module further includes:
an allocation module, configured to allocate, by the base station, the Ncs parameter to the cell;
and a configuration parameter determining module, configured to determine, by the base station, PRACH configuration parameters of the cell according to the Ncs parameter.
Preferably, the configuration parameter determination module includes:
the processing time parameter obtaining submodule is used for obtaining a Field Programmable Gate Array (FPGA) processing time parameter by the base station according to the Ncs parameter;
and the configuration parameter determining submodule is used for determining the PRACH configuration parameters of the cell by the base station according to the FPGA processing time parameters.
Preferably, the processing time parameter obtaining sub-module includes:
the mapping relation establishing unit is used for establishing a mapping relation between the Ncs parameter and the FPGA time parameter;
and the query unit is used for querying and obtaining the FPGA time parameter corresponding to the Ncs parameter according to the mapping relation.
Referring to fig. 7, a block diagram of a fifth structure of an embodiment of a detection apparatus for a PRACH preamble sequence according to an embodiment of the present invention is shown, and is applied to a UE, where the UE is connected to a base station through a cell, and specifically includes the following modules:
a broadcast information receiving module 501, configured to receive broadcast information from the cell by the UE; wherein the broadcast information includes the PRACH configuration parameters and Ncs parameters;
a sequence generating module 502, configured to generate a PRACH preamble sequence by the UE using the Ncs parameter;
a sequence sending module 503, configured to send, by the UE, the PRACH preamble sequence to a base station via a cell according to a sending period; wherein the transmission period is predetermined by the PRACH configuration parameter.
Preferably, the sequence generating module includes:
a root sequence calculation submodule, configured to calculate a root sequence by using the Ncs parameter by the UE;
and the sequence generation submodule is used for generating the PRACH leader sequence by the UE according to the root sequence.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of 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, embodiments of 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, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (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 terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, 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 terminal 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 terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The detailed description of the method and the apparatus for detecting a PRACH preamble sequence provided by the present invention is provided above, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. A detection method of PRACH leader sequence of physical random access channel is characterized in that the method is applied to a base station, the base station comprises a plurality of cells, the base station is connected with User Equipment (UE) through the cells, and the method comprises the following steps:
the base station sends broadcast information to the UE via the cell; wherein the broadcast information comprises PRACH configuration parameters;
the base station judges whether the number of PRACH leader sequences in the same sending period is greater than a preset sequence number threshold value or not; wherein the transmission period is predetermined by the PRACH configuration parameter;
when the number of the PRACH leader sequences is not greater than a preset sequence number threshold, the base station acquires PRACH configuration parameters of the cell;
when a base station receives a leader sequence sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequence; time domain positions corresponding to the PRACH configuration parameters are different;
and the base station outputs a detection result.
2. The method of claim 1, wherein the step of the base station sending broadcast information to the UE via the cell is preceded by the step of:
the base station allocates a cyclic shift sequence Ncs parameter to the cell;
and the base station determines the PRACH configuration parameters of the cell according to the Ncs parameters.
3. The method of claim 2, wherein the step of the base station determining the PRACH configuration parameters of the cell according to the Ncs parameter comprises:
the base station acquires a Field Programmable Gate Array (FPGA) processing time parameter according to the Ncs parameter;
and the base station determines the PRACH configuration parameters of the cell according to the FPGA processing time parameters.
4. The method according to claim 3, wherein the step of obtaining the FPGA processing time parameter according to the Ncs parameter comprises:
establishing a mapping relation between the Ncs parameter and the FPGA processing time parameter;
and inquiring according to the mapping relation to obtain the FPGA processing time parameter corresponding to the Ncs parameter.
5. A detection method of PRACH preamble sequence of physical random access channel is characterized in that the method is applied to User Equipment (UE), the UE is connected with a base station through a cell, and the method comprises the following steps:
the UE receives broadcast information from the cell; the broadcast information comprises PRACH configuration parameters and cyclic shift sequence Ncs parameters;
the UE generates a PRACH leader sequence by adopting the Ncs parameter;
the UE sends the PRACH leader sequence to a base station through a cell according to a sending period so that the base station outputs a detection result; the sending period is predetermined by a time domain position corresponding to the PRACH configuration parameter; the detection result is obtained by the base station judging whether the number of PRACH leader sequences in the same transmission period is greater than a preset sequence number threshold, when the number of the PRACH leader sequences is not greater than the preset sequence number threshold, the base station obtaining PRACH configuration parameters of the cell, and when the base station receives the leader sequences sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequences; and the time domain positions corresponding to the PRACH configuration parameters are different.
6. The method of claim 5, wherein the step of the UE generating the PRACH preamble sequence by using the Ncs parameter comprises:
the UE calculates a root sequence by adopting the Ncs parameter;
and the UE generates a PRACH leader sequence according to the root sequence.
7. A detection device for PRACH preamble sequence of physical random access channel is characterized in that the detection device is applied to a base station, the base station comprises a plurality of cells, the base station is connected with User Equipment (UE) through the cells, and the device comprises:
a broadcast information sending module, configured to send, by the base station, broadcast information to the UE via the cell; wherein the broadcast information comprises PRACH configuration parameters;
a judging module, configured to judge, by the base station, whether the number of PRACH preamble sequences in the same transmission period is greater than a preset sequence number threshold; wherein the transmission period is predetermined by the PRACH configuration parameter;
an obtaining module, configured to, when the number of PRACH preamble sequences is not greater than a preset sequence number threshold, obtain, by the base station, PRACH configuration parameters of the cell;
the detection module is used for detecting the PRACH leader sequence when the base station receives the leader sequence sent by the UE at the time domain position corresponding to the PRACH configuration parameters; time domain positions corresponding to the PRACH configuration parameters are different;
and the output module is used for outputting the detection result by the base station.
8. The apparatus of claim 7, wherein the module coupled to the broadcast information sending module further comprises:
an allocating module, configured to allocate the cyclic shift sequence Ncs parameter to the cell by the base station;
and a configuration parameter determining module, configured to determine, by the base station, PRACH configuration parameters of the cell according to the Ncs parameter.
9. The apparatus of claim 8, wherein the configuration parameter determining module comprises:
the processing time parameter obtaining submodule is used for obtaining a Field Programmable Gate Array (FPGA) processing time parameter by the base station according to the Ncs parameter;
and the configuration parameter determining submodule is used for determining the PRACH configuration parameters of the cell by the base station according to the FPGA processing time parameters.
10. The apparatus of claim 9, wherein the processing time parameter obtaining sub-module comprises:
the mapping relation establishing unit is used for establishing a mapping relation between the Ncs parameter and the FPGA processing time parameter;
and the query unit is used for querying and obtaining the FPGA processing time parameter corresponding to the Ncs parameter according to the mapping relation.
11. A detection device for PRACH preamble sequence of physical random access channel is characterized in that the detection device is applied to User Equipment (UE), the UE is connected with a base station through a cell, and the device comprises:
a broadcast information receiving module, configured to receive, by the UE, broadcast information from the cell; the broadcast information comprises PRACH configuration parameters and cyclic shift sequence Ncs parameters;
a sequence generation module, configured to generate a PRACH preamble sequence by the UE using the Ncs parameter;
a sequence sending module, configured to send, by the UE, the PRACH preamble sequence to a base station via a cell according to a sending period, so that the base station outputs a detection result; the sending period is predetermined by a time domain position corresponding to the PRACH configuration parameter; the detection result is obtained by the base station judging whether the number of PRACH leader sequences in the same transmission period is greater than a preset sequence number threshold, when the number of the PRACH leader sequences is not greater than the preset sequence number threshold, the base station obtaining PRACH configuration parameters of the cell, and when the base station receives the leader sequences sent by the UE at a time domain position corresponding to the PRACH configuration parameters, detecting the PRACH leader sequences; and the time domain positions corresponding to the PRACH configuration parameters are different.
12. The apparatus of claim 11, wherein the sequence generation module comprises:
a root sequence calculation submodule, configured to calculate a root sequence by using the Ncs parameter by the UE;
and the sequence generation submodule is used for generating the PRACH leader sequence by the UE according to the root sequence.
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| CN115442196B (en) * | 2022-08-24 | 2024-05-28 | 成都中科微信息技术研究院有限公司 | Method for enhancing NR PRACH_format_0 coverage capability |
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