CN108811110B - Random access method and device, readable storage medium and base station - Google Patents
Random access method and device, readable storage medium and base station Download PDFInfo
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- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
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Abstract
The invention provides a random access method and a device, a readable storage medium and a base station, wherein the random access method comprises the following steps: issuing random access configuration information to a terminal, wherein the random access configuration information at least comprises a lead code subset range, an association relation exists between the lead code subset range and a beam, and the lead code subset range is used for indicating lead codes for selection when the terminal accesses the beam; receiving a lead code from a terminal, and determining a target beam according to the lead code from the terminal and the incidence relation between the lead code subset range and the beam; and indicating the terminal to access the target beam. The technical scheme of the invention can carry out random access in the NR system supporting multi-beam operation.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a random access method and apparatus, a readable storage medium, and a base station.
Background
Random Access (RA) is an Access process before User Equipment (UE) starts communication with a network, and is referred to as a terminal in the present invention for convenience of description.
The main role of random access is to obtain uplink synchronization of communication, and after the random access process is completed, the base station and the user perform conventional data transmission.
With the development of wireless technology, multi-beam operation can be supported in New systems, for example, New Radio access technology (NR) is introduced by 3GPP, at least including fifth generation mobile communication technology (5G), and a 5G system can support multi-beam operation, so that a New random access method needs to be designed to adapt to the characteristics of the NR system.
Disclosure of Invention
The technical problem solved by the present invention is how to perform random access in NR systems supporting multi-beam operation.
To solve the foregoing technical problem, an embodiment of the present invention provides a random access method, including: issuing random access configuration information to a terminal, wherein the random access configuration information at least comprises a lead code subset range, an association relation exists between the lead code subset range and a beam, and the lead code subset range is used for indicating lead codes for selection when the terminal accesses the beam; receiving a lead code from a terminal, and determining a target beam according to the lead code from the terminal and the incidence relation between the lead code subset range and the beam; and indicating the terminal to access the target beam.
Optionally, the preamble subset ranges associated with different beams indicate different numbers of preambles.
Optionally, the random access method further includes: and determining the number of the preambles indicated by the preamble subset range associated with the beam according to the number of the terminals expected to be carried by the beam.
Optionally, the random access configuration information is issued to a terminal through an associated beam, where the associated beam is a beam having an association relationship with the preamble subset range.
Optionally, the preamble subset range includes a preamble index range indicating at least one preamble index indicating a sequence content of the preamble.
Optionally, the preamble index range at least includes the number of preambles for the terminal to select when accessing the beam; the at least one preamble index is indicated by the number of preambles for the terminal to select when accessing the beam and a preset condition common to the terminal and the network side.
Optionally, the preamble index range further includes: the starting value or the ending value of the preamble index indicates the at least one preamble index through the number of preambles for the terminal to select when accessing the beam and the starting value or the ending value of the preamble index.
Optionally, the number of preambles indicated by the preamble index range is selected from a preset set, where the set includes a plurality of preset numbers.
Optionally, the range of preamble subsets associated with different beams is different.
Optionally, the random access configuration information further includes a random access resource range, where an association relationship exists between the random access resource range and the beam, and the random access resource range is used to indicate a random access resource for a terminal to select when accessing the beam; the preamble from the terminal is received through the random access resource; the target beam is determined according to a random access resource for receiving the preamble, the preamble from the terminal, an association between the preamble subset range and a beam identity, and an association between the random access resource range and a beam.
An embodiment of the present invention further provides a random access apparatus, including: the device comprises a configuration information sending unit and a random access configuration unit, wherein the configuration information sending unit is suitable for sending random access configuration information to a terminal, the random access configuration information at least comprises a lead code subset range, an incidence relation exists between the lead code subset range and a beam, and the lead code subset range is used for indicating lead codes for the terminal to select when the terminal accesses the beam; the target beam determining unit is suitable for receiving the lead codes from the terminals, and determining the target beam according to the lead codes from the terminals and the association relation between the lead code subset range and the beam; an indicating unit adapted to indicate the terminal to access the target beam.
Optionally, the preamble subset ranges associated with different beams indicate different numbers of preambles.
Optionally, the random access apparatus further includes a number determining unit, adapted to determine, according to the number of terminals expected to be carried by the beam, the number of preambles indicated by the preamble subset range associated with the beam.
Optionally, the configuration information sending unit is adapted to issue the random access configuration information to a terminal through an associated beam, where the associated beam is a beam having an association relationship with the preamble subset range.
Optionally, the preamble subset range includes a preamble index range indicating at least one preamble index indicating a sequence content of the preamble.
Optionally, the preamble index range at least includes the number of preambles for the terminal to select when accessing the beam; the at least one preamble index is indicated by the number of preambles for the terminal to select when accessing the beam and a preset condition common to the terminal and the network side.
Optionally, the preamble index range further includes: the starting value or the ending value of the preamble index indicates the at least one preamble index through the number of preambles for the terminal to select when accessing the beam and the starting value or the ending value of the preamble index.
Optionally, the number of preambles indicated by the preamble index range is selected from a preset set, where the set includes a plurality of preset numbers.
Optionally, the range of preamble subsets associated with different beams is different.
Optionally, the random access configuration information further includes a random access resource range, where an association relationship exists between the random access resource range and the beam, and the random access resource range is used to indicate a random access resource for a terminal to select when accessing the beam; the target beam determining unit receives the lead code from the terminal through the random access resource, and determines the target beam according to the random access resource for receiving the lead code, the lead code from the terminal, the association relationship between the lead code subset range and the beam identification, and the association relationship between the random access resource range and the beam.
An embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the random access method are performed.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the random access method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the random access configuration information is issued to the terminal, the random access configuration information at least comprises the lead code subset range, and the lead code subset range and the beam have an association relationship, so that after the terminal receives the random access configuration information, the terminal can select the lead code in the lead code subset range associated with the target beam according to the target beam selected for access and send the lead code to the network side. After receiving the preamble from the terminal, the network side may determine a target beam selected to be accessed by the terminal according to the preamble from the terminal and an association relationship between the preamble subset range and the beam, and instruct the terminal to access the target beam. Thus, the random access method of the present invention can complete random access in an NR system supporting multiple beams.
Because the association relationship exists between the lead code subset range and the wave beams, the lead code subset range can be flexibly set aiming at different wave beams, so that the setting of the lead code subset range can be more targeted, the resource waste of the system can be reduced, the probability of access conflict of the user terminal is reduced, and the access capacity of the system can be further improved.
Drawings
Fig. 1 is a flow chart of a random access method in an embodiment of the present invention;
fig. 2 is a schematic diagram of an association relationship between a preamble subset range and a synchronization signal block in an embodiment of the present invention;
fig. 3 is a schematic diagram of an association relationship between a preamble subset range, a random access resource range and a synchronization signal block in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a random access apparatus according to an embodiment of the present invention.
Detailed Description
As mentioned above, with the continuous development of wireless technology, multi-beam operation can be supported in new systems, for example, 3GPP will introduce new wireless technology including at least fifth generation mobile communication technology, and 5G system can support multi-beam operation, so that a new random access method needs to be designed to adapt to the characteristics of NR system supporting multi-beam operation.
In LTE systems, there has been a concept of a preamble, where a terminal sends a preamble, otherwise known as a random access preamble, to a base station, indicating to the base station the occurrence of a random access attempt, and allowing the base station to estimate the time delay between the base station and the terminal in preparation for further access. A Channel for transmitting the Random Access preamble signal is called a Physical Random Access Channel (PRACH), and the Random Access time-frequency resource is a time-frequency resource allocated for transmitting the Random Access preamble signal on the PRACH.
In the NR system supporting multi-beam, the usage of the preamble may be the same as or similar to that of the preamble in LTE, and the specific signal design of the preamble may be the same as or similar to that in LTE, or may be a new design, which is not limited herein. In the embodiment of the present invention, a resource used for transmitting a preamble is referred to as a random access resource, and a specific design of the random access resource may be the same as or similar to that of the LTE system, or may be a new design, which is not limited herein.
In the NR system supporting multiple beams, each beam may carry one or more Synchronization Signal blocks (SS blocks), and a terminal may select a target beam to access according to reception and detection of the SS blocks. The preamble may be transmitted to the network side when attempting to access the target beam. In a similar manner to that in the LTE system, there is no concept of the preamble subset range, and the network side does not indicate the preamble subset range to the terminal, and the terminal does not know the correspondence between the beam and the preamble subset range. That is, the terminal does not know the specific range of preambles that can be selected corresponding to its selected target beam.
Therefore, if a similar manner to that in the LTE system is adopted, when the terminal selects different beams as target beams, the selectable preambles are all the same, and the network side cannot set different preamble subset ranges for different beams, so that the probability of access collision of the user terminal is high, the resource waste is high, and the access capacity of the system is also limited.
In addition, in the LTE system, in order to avoid inter-cell interference, preambles arranged between cells are usually different, and the LTE system does not support multi-beams, and can be considered as a cell in which a serving cell operates with a single beam, in comparison with an NR system supporting multi-beams. In the NR system supporting multiple beams, one cell may correspond to multiple beams, and thus, in a manner similar to that in LTE, the network side cannot determine the target beam selected by the terminal.
In the embodiment of the invention, the random access configuration information is issued to the terminal, the random access configuration information at least comprises the lead code subset range, and the lead code subset range and the beam have an association relationship, so that after the terminal receives the random access configuration information, the terminal can select the lead code in the lead code subset range associated with the target beam according to the target beam selected for access and send the lead code to the network side. After receiving the preamble from the terminal, the network side may determine a target beam selected to be accessed by the terminal according to the preamble from the terminal and an association relationship between the preamble subset range and the beam, and instruct the terminal to access the target beam. Thus, the random access method of the present invention can complete random access in an NR system supporting multiple beams.
Because the incidence relation exists between the lead code subset range and the wave beams, the lead code subset range can be flexibly set aiming at different wave beams, so that the lead code subset range can be set more pertinently, the resource waste of the system can be reduced, the probability of access conflict of the user terminal is reduced, and the access capacity of the system can be further improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a random access method in an embodiment of the present invention, which may specifically include the following steps:
step S11, sending random access configuration information to the terminal, wherein the random access configuration information at least comprises a lead code subset range, an association relationship exists between the lead code subset range and the beam, and the lead code subset range is used for indicating the lead code for the terminal to select when accessing the beam;
step S12, receiving a lead code from a terminal, and determining a target beam according to the lead code from the terminal and the association relationship between the lead code subset range and the beam;
step S13, instructing the terminal to access the target beam.
In a specific access process, the terminal may select a target beam according to the synchronization signal block, determine a preamble subset range having an association relationship with the target beam after selecting the target beam, select a preamble in the preamble subset range, and transmit the preamble to the network side.
As will be appreciated by those skilled in the art, there is an association between the synchronization signal block and the beam, and therefore an association between the synchronization signal block and the preamble subset range. For the terminal, there is an association relationship between the synchronization signal block and the preamble subset range, and the terminal may also determine the preamble to the associated preamble subset range according to the selected synchronization signal block. The target beam is the beam in which the synchronization signal block is located.
The network side can configure and send the random access configuration information through system information broadcasting or dedicated signaling. As will be understood by those skilled in the art, the network side includes a base station, and the random access configuration information sent by the network side to the terminal may be sent by the base station.
And indicating the terminal to access the target beam means that the network side interacts with the terminal after determining the target beam selected by the terminal according to the lead code and assists the terminal in a subsequent access process, and is not limited to issuing information for access to the terminal.
As described above, in the embodiment of the present invention, there is an association relationship between the preamble subset range and the beam, and the preamble subset range can be set more flexibly for different beams. In particular implementations, the number of preambles indicated by the preamble subset ranges associated with different beams may be different.
Still further, the number of preambles indicated by the preamble subset range associated with the beam may be determined according to the number of terminals expected to be carried by the beam.
The number of preambles indicated by the preamble subset range is the number of preambles that can be selected when the terminal accesses the beam associated with the preamble subset range. In the embodiment of the present invention, the number of terminals to be carried may be set according to the predicted number of the terminals to be carried.
For example, a larger number of preambles may be configured for beams that need to carry more terminals, and indicated by the preamble subset range. In this way, the probability of user terminal access collisions may be reduced. Accordingly, a smaller number of preambles may also be configured for beams that need to carry fewer terminals.
Since the total available number of the preambles of the system is limited, the number of the preambles indicated by the preamble subset range having the association relationship with the beam is determined according to the number of the terminals expected to be carried by the beam, so that the preambles can be more reasonably allocated to different beams, and the provided access capacity can be further improved.
The number of terminals expected to be carried by the beam can be determined according to historical data recorded by the network side, the number of terminals expected to be carried by the beam can be different in different periods, and the number of preambles indicated by the preamble subset range determined that the beam has the association relationship can be different in different periods.
The network side may periodically re-determine the preamble subset range according to the number of terminals expected to be carried by the beam, or may re-determine the preamble subset range at a node where the number of terminals expected to be carried varies according to the number of terminals expected to be carried by the beam.
The number of terminals expected to be carried by the beam may also be determined according to the result of the big data analysis, for example, the preamble subset range may be determined according to the location distribution of the terminals in different time periods, and by combining the direction of the beam and the coverage range. Therefore, the preamble subset range corresponding to different beams can be determined more reasonably under the condition that the base station is initially used and the historical data is insufficient.
In other embodiments of the present invention, the number of preambles indicated by the preamble subset ranges associated with different beams may also be the same, for example, when the base station initially operates, if there is no history data and the analysis is not performed according to big data, the same number of preambles may be configured for different beams.
The number of preambles indicated by the preamble subset range may be directly or indirectly indicated, and accordingly, the number of preambles available for the access beam may be integer or enumerated.
That is, the number of preambles available for the access beam may be any integer set within the range of all available preamble numbers on the network side, or the number of preambles may only be selected from a preset set, where the set includes a plurality of preset numbers.
For example, the number of preambles may be 0, 4, 8, 12, 16, etc. in number. In this way, the number of preambles may be indicated with fewer bits, e.g., the number of available preambles may be indicated as 12 with a binary number of 11.
The step S11 of issuing the random access configuration information to the terminal may be issued through an associated beam, where the associated beam is a beam having an association relationship with the preamble subset range. That is, each beam may only issue a range of preamble subsets associated with the beam to the terminal. Thus, system resources can be saved.
In other embodiments, one beam may also issue multiple preamble subset ranges to the terminal and inform the terminal that the preamble subset ranges are associated with different beams, respectively.
In an embodiment of the present invention, a base station may send a preamble subset range corresponding to a plurality of beams of the base station to a terminal through one beam. In this scenario, the preamble subset range may only indicate the number of preambles for each beam for the terminal to select.
For example, the base station has 3 beams in total, and the base station may issue a preamble subset range associated with each beam to the terminal: 10. 20, 30, the terminal may determine alternative preambles corresponding to different beams according to the convention of the base station and the terminal and the preamble subset range.
Assuming that the base station and the terminal have agreed, the configured preamble subset range is sequentially allocated according to the beam index, three numbers respectively correspond to the number of preambles of the beam 1, the beam 2, and the beam 3 for the terminal to select, the preamble 0 is used as a starting point for determining the preambles of the beams, and the preamble ranges of the three beams for the terminal to select are continuous, the preambles of the beam 1 for the terminal to select are the preambles 0 to 9, the preambles of the beam 2 for the terminal to select are the preambles 10 to 29, and the preambles of the beam 3 for the terminal to select are the preambles 30 to 59.
The preamble subset range configured by the base station in agreement with the network side may be sequentially allocated according to the configured beam sequence, the three beams sequentially correspond to the beam 2, the beam 1, and the beam 3, respectively, and the preamble 59 may be used as an end point for determining the preamble of each beam, or other agreements may be made. The preamble code that can be selected by the terminal for each beam can be determined according to the convention and the preamble code subset range.
Each beam may carry one or more synchronization signal blocks, so there is also an association between the synchronization signal blocks and the preamble subset range.
As can be seen from the foregoing embodiments, the preamble index range indicates that at least one preamble index may be indicated in various manners, for example, in the above example, by informing the terminal of the number of available preambles in different beams, and combining the agreement between the network side and the terminal, that is, the preset condition that the network side and the terminal share, the preamble indicated by the preamble index range may be determined.
In other embodiments of the present invention, the preamble index range may indicate the preamble more directly, for example, the preamble index range may directly include a start value or an end value of the preamble index and the number of preambles for selecting when accessing the beam, and the preamble indicated by the preamble index range may also be determined according to the start value or the end value of the preamble index and the number of preambles for selecting when accessing the beam.
As described above, the preamble subset range is used to indicate the preambles for the terminal to select when accessing the beam, in a specific implementation, the indication may be performed by using a preamble index, the preamble subset range may include the preamble index range, there is an association relationship between the preamble index and the preamble, and the preamble may be determined according to the preamble index, that is, the specific sequence content of the preamble may be determined.
The specific implementation of the preamble index may be the same or similar to the preamble index in the LTE system, for example, in the existing LTE system, each cell has 64 available preambles, and accordingly, there are 64 preamble indexes, and each preamble index corresponds to one preamble. The preamble index in the present invention may also be in other forms different from those in the LTE system, and is not limited herein.
The preamble index range may be defined by the following information: a start value of the preamble index and a number of preambles indicated by the preamble index range, or an end value of the preamble index and a number of preambles indicated by the preamble index range.
That is, the network side may issue the starting value of the preamble index to the terminal in the preamble index range, and the number of preambles available for the terminal to select on the beam. After receiving the two values, the terminal determines, corresponding to a preset index table, a preamble pointed by a preamble index from a start value of the preamble index to a value obtained by adding the start value of the preamble index and the number of preambles available for the terminal to select, and is a preamble available for a beam associated with the preamble index range. If the terminal selects the beam as a target beam, the terminal can select the preamble and transmit the selected preamble to the network side.
Similarly, the network side may issue an end value of the preamble index to the terminal in the preamble index range, and the number of preambles available for the terminal to select on the beam. After receiving the two values, the terminal determines, corresponding to a preset index table, preambles pointed by preamble indexes from the end value of the preamble index to the end value of the preamble index, starting by subtracting the number of preambles available for the terminal to select, and being available for beams associated with the preamble index range.
The preamble index range is defined by a start value or an end value of the preamble index and the number of preambles indicated by the preamble index range, and the preamble index range corresponding to one beam is continuous.
In an embodiment of the present invention, when the base station initially operates, the range of the available preamble subsets in each beam may be configured in an evenly distributed manner. For example, the base station has 4 beams, and the available preambles of the beams are 16. The network side issues to the terminal the start values of the preamble indexes associated with each beam respectively 0,16, 32, 48, and the number of preambles selectable by the terminal on each beam is 16. The preamble subset range of the synchronization signal block 0 may be preambles with preamble indexes of 0 to 15 from the perspective of the synchronization signal block; the preamble subset range of the synchronization signal block 1 may be preambles with preamble indexes of 16 to 31; the preamble subset range of the synchronization signal block 2 may be preambles with preamble indexes of 32 to 47; the preamble subset range of the synchronization signal block 3 may be preambles with preamble indexes of 48 to 63. In the present embodiment, the number of preambles indicated by the preamble subset range, i.e. the size of the preamble subset, is 16.
In another embodiment of the present invention, the range of the preamble subset is set according to the number of terminals that the beam is expected to need to carry. For example, the base station has 4 beams in total, and the available preambles for the respective beams are different. The network side issues to the terminal the initial values of the preamble indexes associated with each beam which are respectively 0,16,41 and 48, and the number of the preambles which can be selected by the terminal on each beam is 16,25, 7 and 16. The preamble subset range of the synchronization signal block 0 may be preambles with preamble indexes of 0 to 15; the preamble subset range of the synchronization signal block 1 may be preambles with preamble indexes of 16 to 40; the preamble subset range of the synchronization signal block 2 may be preambles with preamble indexes of 41 to 47; the preamble subset range of the synchronization signal block 3 may be preambles with preamble indexes of 48 to 63. The range may be set by the base station based on historical data, or may be set in conjunction with the results of the big data analysis when the base station is initially operating.
The manner in which the preamble index indicates the number of preambles may be a direct indication or an indirect indication, and accordingly, the number of preambles available for the access beam may be an integer type or an enumerated type.
That is, the number of preambles available for the access beam may be any integer set within the range of all available preamble numbers on the network side, or the number of preambles may only be selected from a preset set, where the set includes a plurality of preset numbers. For details, reference is made to the foregoing description and no further details are provided herein.
As described above, the terminal may select a target beam according to the synchronization signal block, and there is an association relationship between the synchronization signal block and the beam. From the angle, after the terminal detects the synchronous signal block, the synchronous signal block is selected, the beam carrying the synchronous signal block is determined to be a target beam according to the synchronous signal block, the optional lead code is determined according to the lead code subset range associated with the target beam, and the lead code is further determined and sent to the network side.
There is an association between the synchronization signal block and the preamble subset range, and one embodiment can refer to fig. 2.
A plurality of sync signal blocks, sync signal block 1 through sync signal block n are shown in the figure, may be included in the sync signal burst.
Taking the synchronization signal block 1 and the synchronization signal block n as an example, the preamble subset range 1 associated with the synchronization signal block 1 indicates that the preambles 1 to m can be used by the terminal that selects the beam in which the synchronization signal block 1 is located as the target beam; the preamble subset range 2 associated with the synchronization signal block 2 indicates that the preambles n to n + f can be used by the terminal that selects the beam in which the synchronization signal block 1 is located as the target beam. Wherein n, m and f are positive numbers. The contents of the specific signal sequences of the preambles 1 to m and the preambles n to n + f are known to the network side and the terminal.
In the above embodiments, the preamble subset ranges associated with different beams are different. The network side can determine the target beam according to the received preamble and the association relationship between the preamble subset range and the beam.
In other embodiments of the present invention, the preamble subset ranges associated with different beams may be the same, and the random access configuration information may further include a random access resource range, where an association relationship exists between the random access resource range and the beam.
The network side may determine the target beam jointly according to the random access resource for receiving the preamble, the preamble from the terminal, the association between the preamble subset range and the beam identifier, and the association between the random access resource range and the beam.
The random access resource range indicates random access resources which can be selected by the terminal when the terminal transmits the preamble to the network side. The network side can jointly determine the target beam selected by the terminal according to the lead code from the terminal and the random access resource for transmitting the lead code.
The association between the preamble subset range and the beam, and the association between the random access resource range and the beam may also be defined by the synchronization signal block. Referring to fig. 3, the synchronization signal blocks 1 to 5 are respectively associated to different combinations of preamble subset ranges and random access resource ranges.
Although the synchronization signal block 2 and the synchronization signal block 4 are associated to the same preamble subset range 1, the random access resource ranges associated with the synchronization signal block 2 and the synchronization signal block 4 are different, so that the network side can determine the target beam selected by the terminal through the combination of the random access resource range and the preamble subset range.
An embodiment of the present invention further provides a random access apparatus, a schematic structural diagram of which is shown in fig. 4, and the random access apparatus may include:
a configuration information sending unit 41, adapted to issue random access configuration information to the terminal, where the random access configuration information at least includes a preamble subset range, and there is an association relationship between the preamble subset range and a beam, where the preamble subset range is used to indicate preambles for the terminal to select when accessing the beam;
a target beam determining unit 42, adapted to receive the preamble from the terminal, and determine a target beam according to at least the preamble from the terminal and the association relationship between the preamble subset range and the beam;
an instructing unit 43 adapted to instruct the terminal to access the target beam.
In particular implementations, the number of preambles indicated by the preamble subset ranges associated with different beams may be different.
In a specific implementation, the random access apparatus may further include a number determining unit (not shown in the figure) adapted to determine, according to the number of terminals expected to be carried by the beam, the number of preambles indicated by the preamble subset range associated with the beam.
In a specific implementation, the configuration information sending unit 41 is adapted to send the random access configuration information to the terminal through an associated beam, where the associated beam is a beam having an association relationship with the preamble subset range.
In a specific implementation, the preamble subset range may include a preamble index range indicating at least one preamble index indicating a sequence content of the preamble.
In a specific implementation, the preamble index range may include at least the number of preambles for the terminal to select when accessing the beam; the at least one preamble index is indicated by the number of preambles for the terminal to select when accessing the beam and a preset condition common to the terminal and the network side.
In a specific implementation, the preamble index range may further include: the starting value or the ending value of the preamble index indicates the at least one preamble index through the number of preambles for the terminal to select when accessing the beam and the starting value or the ending value of the preamble index.
In a specific implementation, the number of preambles indicated by the preamble index range may be selected from a preset set, where the set includes a plurality of preset numbers.
In particular implementations, the range of preamble subsets associated with different beams may be different.
In a specific implementation, the random access configuration information may further include a random access resource range, where an association relationship exists between the random access resource range and the beam, and the random access resource range is used to indicate a random access resource for the terminal to select when accessing the beam.
The target beam determining unit 42 may receive the preamble from the terminal through the random access resource, and determine the target beam according to the random access resource for receiving the preamble, the preamble from the terminal, the association relationship between the preamble subset range and the beam identifier, and the association relationship between the random access resource range and the beam.
Specific implementation and beneficial effects of the random access apparatus in the embodiment of the present invention may refer to the random access method in the embodiment of the present invention, and are not described herein again.
The embodiment of the present invention further provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the random access method in the embodiment of the present invention may be executed.
The computer readable storage medium may be an optical disc, a mechanical hard disk, a solid state hard disk, etc.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and when the processor executes the computer instruction, the step of the random access method in the embodiment of the present invention may be executed.
The terminal can be various appropriate terminals such as a smart phone and a tablet computer.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A random access method, comprising:
issuing random access configuration information to a terminal, wherein the random access configuration information at least comprises a lead code subset range, an association relation exists between the lead code subset range and a beam, and the lead code subset range is used for indicating lead codes for selection when the terminal accesses the beam;
receiving a lead code from a terminal, and determining a target beam according to the lead code from the terminal and the incidence relation between the lead code subset range and the beam;
instructing the terminal to access the target beam;
and issuing the random access configuration information to a terminal through associated beams, wherein the associated beams are beams which have an association relation with the preamble subset range, and each beam only issues the preamble subset range associated with the beam to the terminal.
2. The random access method according to claim 1, wherein the preamble subset ranges associated with different beams indicate different numbers of preambles.
3. The random access method of claim 1, further comprising: and determining the number of the preambles indicated by the preamble subset range associated with the beam according to the number of the terminals expected to be carried by the beam.
4. The random access method of claim 1, wherein the preamble subset range comprises a preamble index range indicating at least one preamble index indicating a sequence content of the preamble.
5. The random access method of claim 4, wherein the preamble index range at least includes a number of preambles for the terminal to select when accessing the beam; the at least one preamble index is indicated by the number of preambles for the terminal to select when accessing the beam and a preset condition common to the terminal and the network side.
6. The random access method of claim 5, wherein the preamble index range further comprises: the starting value or the ending value of the preamble index indicates the at least one preamble index through the number of preambles for the terminal to select when accessing the beam and the starting value or the ending value of the preamble index.
7. The random access method according to claim 5, wherein the number of preambles indicated by the preamble index range is selected from a preset set, and the set comprises a plurality of preset numbers.
8. The random access method of claim 1, wherein the range of preamble subsets associated with different beams is different.
9. The random access method according to claim 1, wherein the random access configuration information further includes a random access resource range, and there is an association relationship between the random access resource range and a beam, and the random access resource range is used for indicating a random access resource for a terminal to select when accessing the beam;
the preamble from the terminal is received through the random access resource;
the target beam is determined according to a random access resource for receiving the preamble, the preamble from the terminal, an association between the preamble subset range and a beam identity, and an association between the random access resource range and a beam.
10. A random access apparatus, comprising:
the device comprises a configuration information sending unit and a random access configuration unit, wherein the configuration information sending unit is suitable for sending random access configuration information to a terminal, the random access configuration information at least comprises a lead code subset range, an incidence relation exists between the lead code subset range and a beam, and the lead code subset range is used for indicating lead codes for the terminal to select when the terminal accesses the beam; the target beam determining unit is suitable for receiving the lead codes from the terminals, and determining the target beam according to the lead codes from the terminals and the association relation between the lead code subset range and the beam;
an indicating unit adapted to indicate the terminal to access the target beam;
the configuration information sending unit is adapted to issue the random access configuration information to the terminal through associated beams, where the associated beams are beams having an association relationship with the preamble subset range, and each beam only issues the preamble subset range associated with the beam to the terminal.
11. The random access apparatus of claim 10, wherein the preamble subset ranges associated with different beams indicate different numbers of preambles.
12. The random access apparatus according to claim 10, further comprising a number determining unit adapted to determine the number of preambles indicated by the preamble subset range associated with the beam according to the number of terminals expected to be carried by the beam.
13. The random access apparatus of claim 10, wherein the preamble subset range comprises a preamble index range indicating at least one preamble index indicating a sequence content of the preamble.
14. The access device of claim 13, wherein the preamble index range comprises at least a number of preambles for the terminal to select when accessing a beam; the at least one preamble index is indicated by the number of preambles for the terminal to select when accessing the beam and a preset condition common to the terminal and the network side.
15. The random access apparatus of claim 14, wherein the preamble index range further comprises: a start value or an end value of a preamble index, the at least one preamble index being indicated by a number of preambles for a terminal to select when accessing a beam and the start value or the end value of the preamble index.
16. The random access apparatus of claim 14, wherein the number of preambles indicated by the preamble index range is selected from a preset set, and wherein the set comprises a plurality of preset numbers.
17. The random access apparatus of claim 10, wherein the range of preamble subsets associated with different beams is different.
18. The apparatus according to claim 10, wherein the random access configuration information further includes a random access resource range, and there is an association relationship between the random access resource range and a beam, and the random access resource range is used to indicate a random access resource for the terminal to select when accessing the beam;
the target beam determining unit receives the lead code from the terminal through the random access resource, and determines the target beam according to the random access resource for receiving the lead code, the lead code from the terminal, the association relationship between the lead code subset range and the beam identification, and the association relationship between the random access resource range and the beam.
19. A computer readable storage medium having stored thereon computer instructions, characterized in that the computer instructions are operable to perform the steps of the random access method according to any one of claims 1 to 9.
20. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the random access method of any one of claims 1 to 9.
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| KR20210089165A (en) | 2018-11-14 | 2021-07-15 | 지티이 코포레이션 | Generation of a random access signal with bearer information |
| WO2020165977A1 (en) * | 2019-02-13 | 2020-08-20 | 株式会社Ｎｔｔドコモ | User device |
| US20220191945A1 (en) * | 2019-03-27 | 2022-06-16 | Panasonic Intellectual Property Corporation Of America | Terminal and transmission method |
| CN117395808A (en) | 2019-03-29 | 2024-01-12 | 华为技术有限公司 | Communication method, communication device and communication system |
| US11419147B2 (en) * | 2019-06-03 | 2022-08-16 | Qualcomm Incorporated | Beam association in random access procedures |
| CN112020135B (en) * | 2020-09-04 | 2022-08-26 | 朗恒科技集团有限公司 | Medical big data transmission method and system based on license-free frequency spectrum |
| CN112422248B (en) * | 2020-09-30 | 2023-07-14 | 国网安徽省电力有限公司信息通信分公司 | Method and system for distributing leader subset supporting network slice and large connection |
| CN113630896B (en) * | 2021-02-22 | 2023-09-01 | 中国科学院上海高等研究院 | Random access method, base station and terminal |
| CN113316266B (en) * | 2021-05-28 | 2023-04-07 | 成都蒙特斯科技有限公司 | Audio and video stream transmission method and system based on 5G network |
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